diff --git a/.circleci/config.yml b/.circleci/config.yml
index 95a656e..e302088 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -321,6 +321,41 @@ jobs:
           docker_etcd_host_folder: singnet/etcd/${SERVICE_NAME}/
           docker_etcd_container_folder: opt/singnet/${CIRCLE_PROJECT_REPONAME}/${SERVICE_FOLDER}/etcd/
 
+  build-siggraph-colorization:
+    docker:
+      - image: circleci/python:3.6.6-node
+    working_directory: ~/singnet
+    environment:
+      SERVICE_NAME: siggraph-colorization
+      SERVICE_FOLDER: services/siggraph-colorization
+      SERVICE_RUN_COMMAND: bash -c "git pull;python3 run_colorize_service.py"
+      SERVICE_TEST_COMMAND: bash -c "sleep 10;python3 test_colorize_service.py auto"
+    steps:
+      - build_command:
+          docker_nvidia: true
+          docker_image_name: siggraph_colorization
+          docker_container_name: SIGGRAPH_COLORIZATION
+
+  deploy-siggraph-colorization:
+    docker:
+    - image: circleci/python:3.6.6-node
+    working_directory: ~/singnet
+    environment:
+      SERVICE_NAME: siggraph-colorization
+      SERVICE_FOLDER: services/siggraph-colorization
+      CERTS_FOLDER: singnet/.certs
+      SERVICE_RUN_COMMAND: bash -c "git pull;python3 run_colorize_service.py --ssl"
+      SERVICE_TEST_COMMAND: bash -c "sleep 10;python3 test_colorize_service.py auto"
+      SNETD_PORT_MAINNET: 7035
+      SNETD_PORT_ROPSTEN: 7085
+    steps:
+      - deploy_command:
+          docker_nvidia: true
+          docker_image_name: siggraph_colorization
+          docker_container_name: SIGGRAPH_COLORIZATION
+          docker_etcd_host_folder: singnet/etcd/${SERVICE_NAME}/
+          docker_etcd_container_folder: opt/singnet/${CIRCLE_PROJECT_REPONAME}/${SERVICE_FOLDER}/etcd/
+
   build-yolov3-object-detection:
     docker:
       - image: circleci/python:3.6.6-node
@@ -454,6 +489,14 @@ workflows:
             branches:
               only: master
 
+      - build-siggraph-colorization
+      - deploy-siggraph-colorization:
+          requires:
+            - build-siggraph-colorization
+          filters:
+            branches:
+              only: master
+
       - build-yolov3-object-detection
       - deploy-yolov3-object-detection:
           requires:
diff --git a/.gitignore b/.gitignore
index 35c42c0..b32059b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -15,4 +15,5 @@ config/
 !/services/
 **/etcd/
 !/docs/assets/*.jpg
-!/docs/assets/users_guide/*.jpg
\ No newline at end of file
+!/docs/assets/users_guide/*.jpg
+!/docs/assets/users_guide/*.png
\ No newline at end of file
diff --git a/README.md b/README.md
index ada1da2..8897811 100644
--- a/README.md
+++ b/README.md
@@ -18,6 +18,17 @@ For more details on how to publish and test a service, select it from the list b
 
 ### Images:
 - [cntk-image-recon](services/cntk-image-recon) ([User's Guide](docs/users_guide/cntk-image-recon.md)) - This service uses ResNet152 model, trained to recognize different types of flowers and dog breeds. [[Reference](https://cntk.ai/pythondocs/CNTK_301_Image_Recognition_with_Deep_Transfer_Learning.html)]
+- [siggraph-colorization](services/siggraph-colorization) ([User's Guide](docs/users_guide/siggraph-colorization.md)) - This service learns to automatically color grayscale images with a deep network.
+    ```
+     @Article{IizukaSIGGRAPH2016,
+       author = {Satoshi Iizuka and Edgar Simo-Serra and Hiroshi Ishikawa},
+       title = {{Let there be Color!: Joint End-to-end Learning of Global and Local Image Priors for Automatic Image Colorization with Simultaneous Classification}},
+       journal = "ACM Transactions on Graphics (Proc. of SIGGRAPH 2016)",
+       year = 2016,
+       volume = 35,
+       number = 4,
+     }
+    ```
 - [yolov3-object-detection](services/yolov3-object-detection) ([User's Guide](docs/users_guide/yolov3-object-detection.md)) - This service uses YOLOv3 model to detect objects on images. [[Reference](https://pjreddie.com/darknet/yolo/)]
     ```
       @article{yolov3,
@@ -74,5 +85,6 @@ Each service is licensed as followed:
 - i3d-video-action-recognition - [Apache License 2.0](https://github.com/deepmind/kinetics-i3d/blob/master/LICENSE)
 - places365-scene-recognition - [MIT License](https://github.com/CSAILVision/places365/blob/master/LICENSE)
 - s2vt-video-captioning - [Attribution 4.0 International (CC BY 4.0)](http://creativecommons.org/licenses/by/4.0/)
+- siggraph-colorization - [Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License](https://github.com/satoshiiizuka/siggraph2016_colorization/blob/master/LICENSE)
 - yolov3-object-detection - [Public domain](https://github.com/pjreddie/darknet/blob/master/LICENSE)
 - zeta36-chess-alpha-zero - [MIT License](https://github.com/Zeta36/chess-alpha-zero/blob/master/LICENSE.txt)
\ No newline at end of file
diff --git a/docs/assets/users_guide/carnaval.png b/docs/assets/users_guide/carnaval.png
new file mode 100644
index 0000000..3ba98b5
Binary files /dev/null and b/docs/assets/users_guide/carnaval.png differ
diff --git a/docs/assets/users_guide/carnaval_colorized.png b/docs/assets/users_guide/carnaval_colorized.png
new file mode 100644
index 0000000..8bb43b7
Binary files /dev/null and b/docs/assets/users_guide/carnaval_colorized.png differ
diff --git a/docs/assets/users_guide/jucelino.png b/docs/assets/users_guide/jucelino.png
new file mode 100644
index 0000000..5bcdf6a
Binary files /dev/null and b/docs/assets/users_guide/jucelino.png differ
diff --git a/docs/assets/users_guide/jucelino_colorized.png b/docs/assets/users_guide/jucelino_colorized.png
new file mode 100644
index 0000000..13b5f35
Binary files /dev/null and b/docs/assets/users_guide/jucelino_colorized.png differ
diff --git a/docs/index.html b/docs/index.html
index d0c191e..3131b3f 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -126,6 +126,22 @@ <h1 class="card-title pricing-card-title">Free</h1>
           </div>
         </div>
 
+        <div class="card mb-4 shadow-sm">
+          <div class="card-header">
+            <h4 class="my-0 font-weight-normal">siggraph-colorization</h4>
+          </div>
+          <div class="card-body">
+            <h1 class="card-title pricing-card-title">Free</h1>
+            <ul class="list-unstyled mt-3 mb-4">
+              <li>Gray Scale</li>
+              <li>Colorization</li>
+              <li>DNN</li>
+              <li><a href="http://iizuka.cs.tsukuba.ac.jp/projects/colorization/en/">Reference</a></li>
+            </ul>
+              <a href="users_guide/siggraph-colorization.html" class="btn btn-lg btn-block btn-outline-primary" role="button">User's Guide</a>
+          </div>
+        </div>
+
         <div class="card mb-4 shadow-sm">
           <div class="card-header">
             <h4 class="my-0 font-weight-normal">zeta36-chess-alpha-zero</h4>
diff --git a/docs/users_guide/cntk-image-recon.md b/docs/users_guide/cntk-image-recon.md
index a618403..d16cfbe 100644
--- a/docs/users_guide/cntk-image-recon.md
+++ b/docs/users_guide/cntk-image-recon.md
@@ -37,10 +37,10 @@ You can use this service from [SingularityNET DApp](http://beta.singularitynet.i
 
 You can also call the service from SingularityNET CLI (`snet`).
 
-Assuming that you have an open channel (`id: 0`) to this service:
+Assuming that you have an open channel to this service:
 
 ```
-$ snet client call 0 0.00000001 54.203.198.53:7004 flowers '{"model": "ResNet152", "img_path": "https://www.fiftyflowers.com/site_files/FiftyFlowers/Image/Product/Mini-Black-Eye-bloom-350_c7d02e72.jpg"}'
+$ snet client call snet cntk-image-recon flowers '{"model": "ResNet152", "img_path": "https://www.fiftyflowers.com/site_files/FiftyFlowers/Image/Product/Mini-Black-Eye-bloom-350_c7d02e72.jpg"}'
 ...
 Read call params from cmdline...
 
diff --git a/docs/users_guide/i3d-video-action-recognition.md b/docs/users_guide/i3d-video-action-recognition.md
index da35a3d..f1da9a6 100644
--- a/docs/users_guide/i3d-video-action-recognition.md
+++ b/docs/users_guide/i3d-video-action-recognition.md
@@ -33,10 +33,10 @@ You can use this service from [SingularityNET DApp](http://beta.singularitynet.i
 
 You can also call the service from SingularityNET CLI (`snet`).
 
-Assuming that you have an open channel (`id: 0`) to this service:
+Assuming that you have an open channel to this service:
 
 ```
-$ snet client call 0 0.00000001 54.203.198.53:7005 video_action_recon '{"model": "400", "url": "http://crcv.ucf.edu/THUMOS14/UCF101/UCF101/v_CricketShot_g04_c02.avi"}'
+$ snet client call snet i3d-video-action-recognition video_action_recon '{"model": "400", "url": "http://crcv.ucf.edu/THUMOS14/UCF101/UCF101/v_CricketShot_g04_c02.avi"}'
 ...
 Read call params from cmdline...
 
diff --git a/docs/users_guide/object-detection-image-recon.md b/docs/users_guide/object-detection-image-recon.md
index 1d1310f..842aff8 100644
--- a/docs/users_guide/object-detection-image-recon.md
+++ b/docs/users_guide/object-detection-image-recon.md
@@ -34,10 +34,10 @@ You can use this service from [SingularityNET DApp](http://beta.singularitynet.i
 
 You can also call the service from SingularityNET CLI (`snet`).
 
-Assuming that you have an open channel (`id: 0`) to this service:
+Assuming that you have an open channel  to this service:
 
 ```
-$ snet client call 0 0.00000001 54.203.198.53:7006 detect_recon '{"model_detect": "yolov3", "model_recon": "ResNet152", "img_path": "https://figopetinsurance.com/sites/default/files/styles/blog_detail/public/imagedogsman-and-dog-hiking-mountainsblog.jpg", "confidence": "0.5"}'
+$ snet client call snet object-detection-image-recon detect_recon '{"model_detect": "yolov3", "model_recon": "ResNet152", "img_path": "https://figopetinsurance.com/sites/default/files/styles/blog_detail/public/imagedogsman-and-dog-hiking-mountainsblog.jpg", "confidence": "0.5"}'
 ...
 Read call params from cmdline...
 
diff --git a/docs/users_guide/places365-scene-recognition.md b/docs/users_guide/places365-scene-recognition.md
index 635d28b..372dee7 100644
--- a/docs/users_guide/places365-scene-recognition.md
+++ b/docs/users_guide/places365-scene-recognition.md
@@ -30,14 +30,11 @@ And returns as **output**:
 
 You can call the `places365-scene-recognition` service by installing the [SingularityNET Cli](https://github.com/singnet/snet-cli) through its `snet client call` command. Assuming you have an open channel to this service:
 
-1. Use its CHANNEL_ID (e.g.: `270`); 
-2. Specify a price in AGIs (e.g.: `0`, since its a free service);
-3. Point to the endpoint at which this service's [SNET Daemon](https://github.com/singnet/snet-daemon) listens to the blockchain waiting for client calls: `54.203.198.53:7019`. You can obtain this and other information about registered services by running `snet service print_metadata ORGANIZATION SERVICE_NAME`.
-4. Filling in the method and some input data as defined in the service's `.proto` file.
+1. Fill in the method and some input data as defined in the service's `.proto` file.
 
 Example call:
 ```
-$ snet client call 270 0 54.203.198.53:7019 recognize_scene '{"input_image":"https://static1.squarespace.com/static/564783d5e4b077901c4bdc37/t/5a823d47c83025d76ac6ddae/1518484818865/Piccolo-104.jpg?format=1500w", "predict":"io, categories"}'
+$ snet client call snet places365-scene-recognition recognize_scene '{"input_image":"https://static1.squarespace.com/static/564783d5e4b077901c4bdc37/t/5a823d47c83025d76ac6ddae/1518484818865/Piccolo-104.jpg?format=1500w", "predict":"io, categories"}'
 ...
 data: "{\"io\": \"indoor\", \"categories\": \" 0.924 -> beauty_salon, 0.006 -> gymnasium/indoor, 0.005 -> clean_room, 0.005 -> biology_laboratory, 0.004 -> chemistry_lab,\"}"
 ```
diff --git a/docs/users_guide/s2vt-video-captioning.md b/docs/users_guide/s2vt-video-captioning.md
index d91907b..a841fd7 100644
--- a/docs/users_guide/s2vt-video-captioning.md
+++ b/docs/users_guide/s2vt-video-captioning.md
@@ -38,10 +38,10 @@ You can use this service from [SingularityNET DApp](http://beta.singularitynet.i
 
 You can also call the service from SingularityNET CLI (`snet`).
 
-Assuming that you have an open channel (`id: 0`) to this service:
+Assuming that you have an open channel to this service:
 
 ```
-$ snet client call 0 0.00000001 54.203.198.53:7007 video_cap '{"url": "http://crcv.ucf.edu/THUMOS14/UCF101/UCF101/v_PlayingGuitar_g05_c01.avi", "start_time_sec": "0", "stop_time_sec": "0"}'
+$ snet client call snet s2vt-video-captioning video_cap '{"url": "http://crcv.ucf.edu/THUMOS14/UCF101/UCF101/v_PlayingGuitar_g05_c01.avi", "start_time_sec": "0", "stop_time_sec": "0"}'
 ...
 Read call params from cmdline...
 
diff --git a/docs/users_guide/siggraph-colorization.html b/docs/users_guide/siggraph-colorization.html
new file mode 100644
index 0000000..9e10b02
--- /dev/null
+++ b/docs/users_guide/siggraph-colorization.html
@@ -0,0 +1,81 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
+    <meta name="description" content="">
+    <meta name="author" content="">
+    <link rel="shortcut icon" href="https://singularitynet.io/wp-content/uploads/2018/05/favicon.ico" />
+
+    <title>SingularityNET Service - siggraph-colorization</title>
+
+    <!-- Bootstrap core CSS -->
+    <link href="../css/bootstrap.min.css" rel="stylesheet">
+
+    <!-- Custom styles for this template -->
+    <link href="../css/pricing.css" rel="stylesheet">
+    <link href="../css/style.css" rel="stylesheet">
+  </head>
+
+  <body>
+
+    <div class="d-flex flex-column flex-md-row align-items-center p-3 px-md-4 mb-3 bg-white border-bottom shadow-sm">
+      <h5 class="my-0 mr-md-auto font-weight-normal">SingularityNET</h5>
+      <a class="btn btn-outline-primary" href="../index.html">User's Guide Hub</a>
+    </div>
+
+    <div class="pricing-header px-3 py-3 pt-md-5 pb-md-4 mx-auto text-center">
+      <h1 class="display-4">siggraph-colorization</h1>
+      <p class="lead">Service User's Guide</p>
+    </div>
+
+    <div class="container">
+        <div id="preview"> </div>
+    </div>
+
+    <footer class="pt-4 my-md-5 pt-md-5 border-top"></footer>
+
+    <!-- Bootstrap core JavaScript
+    ================================================== -->
+    <!-- Placed at the end of the document so the pages load faster -->
+    <script src="../js/jquery-slim.min.js"></script>
+    <script src="../js/popper.min.js"></script>
+    <script src="../js/bootstrap.min.js"></script>
+    <script src="../js/holder.min.js"></script>
+    <script>
+      Holder.addTheme('thumb', {
+        bg: '#55595c',
+        fg: '#eceeef',
+        text: 'Thumbnail'
+      });
+    </script>
+        <script type="text/javascript" src="../js/showdown.min.js"></script>
+        <script>
+          function Editor(preview) {
+            this.update = function () {
+                var rawFile = new XMLHttpRequest();
+                var allText = "# Fail!";
+                rawFile.open("GET", "siggraph-colorization.md", false);
+                rawFile.onreadystatechange = function ()
+                {
+                    if(rawFile.readyState === 4)
+                    {
+                        if(rawFile.status === 200 || rawFile.status === 0)
+                        {
+                            allText = rawFile.responseText;
+                        }
+                    }
+                };
+                rawFile.send(null);
+                let converter = new showdown.Converter({ tables: true });
+                let html = converter.makeHtml(allText);
+                preview.innerHTML = converter.makeHtml(html);
+            };
+            this.update();
+          }
+          var $ = function (id) { return document.getElementById(id); };
+          new Editor($("preview"));
+        </script>
+    </body>
+    <script src="../js/bootstrap.min.js"></script>
+</html>
\ No newline at end of file
diff --git a/docs/users_guide/siggraph-colorization.md b/docs/users_guide/siggraph-colorization.md
new file mode 100644
index 0000000..6b91081
--- /dev/null
+++ b/docs/users_guide/siggraph-colorization.md
@@ -0,0 +1,61 @@
+[issue-template]: ../../../issues/new?template=BUG_REPORT.md
+[feature-template]: ../../../issues/new?template=FEATURE_REQUEST.md
+
+![singnetlogo](../assets/singnet-logo.jpg?raw=true 'SingularityNET')
+
+# Let there be Color!
+
+This service uses [Let there be Color!](http://iizuka.cs.tsukuba.ac.jp/projects/colorization/en/) to perform colorization on grayscale images.
+
+It is part of our third party [DNN Model Services](https://github.com/singnet/dnn-model-services).
+
+### Welcome
+
+The service receives a grayscale image and uses it as an input for a pre-trained Torch model.
+
+The model was trained on the [Places dataset](http://places.csail.mit.edu/) and thus best performance is for natural outdoor images.
+
+### What’s the point?
+
+The service can colorize grayscale images.
+
+### How does it work?
+
+The user must provide the following input in order to start the service and get a response:
+
+Input:
+  - `img_input`: A grayscale image URL.
+
+You can use this service from [SingularityNET DApp](http://beta.singularitynet.io/).
+
+You can also call the service from SingularityNET CLI (`snet`).
+
+Assuming that you have an open channel to this service:
+
+```
+$ snet client call snet siggraph-colorization colorize '{"img_input": "https://snet-models.s3.amazonaws.com/bh/Colorize/carnaval.jpg"}'
+
+[Base64 Image]
+```
+
+### What to expect from this service?
+
+Input Image:
+
+![Carnaval Grayscale](../assets/users_guide/carnaval.png)
+
+
+Response:
+
+![BackpackManDog Splash 1](../assets/users_guide/carnaval_colorized.png)
+
+
+Input Image:
+
+![Carnaval Grayscale](../assets/users_guide/jucelino.png)
+
+
+Response:
+
+![BackpackManDog Splash 1](../assets/users_guide/jucelino_colorized.png)
+
diff --git a/docs/users_guide/yolov3-object-detection.md b/docs/users_guide/yolov3-object-detection.md
index 708fabc..e409028 100644
--- a/docs/users_guide/yolov3-object-detection.md
+++ b/docs/users_guide/yolov3-object-detection.md
@@ -34,10 +34,10 @@ You can use this service from [SingularityNET DApp](http://beta.singularitynet.i
 
 You can also call the service from SingularityNET CLI (`snet`).
 
-Assuming that you have an open channel (`id: 0`) to this service:
+Assuming that you have an open channel to this service:
 
 ```
-$ snet client call 0 0.00000001 54.203.198.53:7008 detect '{"model": "yolov3", "img_path": "https://hips.hearstapps.com/amv-prod-cad-assets.s3.amazonaws.com/images/media/51/2017-10best-lead-photo-672628-s-original.jpg", "confidence": "0.5"}'
+$ snet client call snet yolov3-object-detection detect '{"model": "yolov3", "img_path": "https://hips.hearstapps.com/amv-prod-cad-assets.s3.amazonaws.com/images/media/51/2017-10best-lead-photo-672628-s-original.jpg", "confidence": "0.5"}'
 ...
 Read call params from cmdline...
 
diff --git a/docs/users_guide/zeta36-chess-alpha-zero.md b/docs/users_guide/zeta36-chess-alpha-zero.md
index ab54cd7..47be68c 100644
--- a/docs/users_guide/zeta36-chess-alpha-zero.md
+++ b/docs/users_guide/zeta36-chess-alpha-zero.md
@@ -71,10 +71,10 @@ You can use this service from [SingularityNET DApp](http://beta.singularitynet.i
 
 You can also call the service from SingularityNET CLI (`snet`).
 
-Assuming that you have an open channel (`id: 0`) to this service:
+Assuming that you have an open channel to this service:
 
 ```
-$ snet client call 0 0.00000001 54.203.198.53:7077 play '{"uid": "my_uid","move": "c2c4"}'
+$ snet client call snet zeta36-chess-alpha-zero play '{"uid": "my_uid","move": "c2c4"}'
 
 response:
 UID: my_uid
diff --git a/services/cntk-image-recon/README.md b/services/cntk-image-recon/README.md
index b83de76..87d91f3 100644
--- a/services/cntk-image-recon/README.md
+++ b/services/cntk-image-recon/README.md
@@ -1,7 +1,7 @@
 [issue-template]: ../../../../../issues/new?template=BUG_REPORT.md
 [feature-template]: ../../../../../issues/new?template=FEATURE_REQUEST.md
 
-![singnetlogo](../../../docs/assets/singnet-logo.jpg?raw=true 'SingularityNET')
+![singnetlogo](../../docs/assets/singnet-logo.jpg 'SingularityNET')
 
 # CNTK Image Recognition
 
@@ -14,7 +14,7 @@ It is part of our third party [DNN Model Services](https://github.com/singnet/dn
 ### Requirements
 
 - [Python 3.6.5](https://www.python.org/downloads/release/python-365/)
-- [Node 8+ w/npm](https://nodejs.org/en/download/)
+- [SNET CLI](https://github.com/singnet/snet-cli)
 - Pre-trained models (dogs and flowers)
 
 ### Development
@@ -125,19 +125,13 @@ Image (Link): https://cdn2-www.dogtime.com/assets/uploads/2011/01/file_22950_sta
 
 Through SingularityNET (follow this [link](https://dev.singularitynet.io/tutorials/publish/) to learn how to publish a service and open a payment channel to be able to call it):
 
-Assuming that you have an open channel (`id: 0`) to this service:
+Assuming that you have an open channel to this service:
 
 ```
 $ snet client call snet cntk-image-recon flowers '{"model": "ResNet152", "img_path": "https://www.fiftyflowers.com/site_files/FiftyFlowers/Image/Product/Mini-Black-Eye-bloom-350_c7d02e72.jpg"}'
-...
-Read call params from cmdline...
-
-Calling service...
-
-    response:
-        delta_time: '1.5536'
-        top_5: '{1: ''98.93%: sunflower'', 2: ''00.64%: black-eyed susan'', 3: ''00.16%:
-            barbeton daisy'', 4: ''00.14%: oxeye daisy'', 5: ''00.03%: daffodil''}'
+Price for this call will be 0.00000001 AGI (use -y to remove this warning). Proceed? (y/n): y
+delta_time: "2.5509"
+top_5: "{1: \'98.93%: sunflower\', 2: \'00.64%: black-eyed susan\', 3: \'00.16%: barbeton daisy\', 4: \'00.14%: oxeye daisy\', 5: \'00.03%: daffodil\'}"
 ```
 
 ## Contributing and Reporting Issues
diff --git a/services/i3d-video-action-recognition/README.md b/services/i3d-video-action-recognition/README.md
index 1fd9fd4..ead22e7 100644
--- a/services/i3d-video-action-recognition/README.md
+++ b/services/i3d-video-action-recognition/README.md
@@ -1,7 +1,7 @@
 [issue-template]: ../../../../../issues/new?template=BUG_REPORT.md
 [feature-template]: ../../../../../issues/new?template=FEATURE_REQUEST.md
 
-![singnetlogo](../../../docs/assets/singnet-logo.jpg?raw=true 'SingularityNET')
+![singnetlogo](../../docs/assets/singnet-logo.jpg 'SingularityNET')
 
 # I3D Video Action Recognition
 
@@ -14,7 +14,7 @@ It is part of our third party [DNN Model Services](https://github.com/singnet/dn
 ### Requirements
 
 - [Python 3.6.5](https://www.python.org/downloads/release/python-365/)
-- [Node 8+ w/npm](https://nodejs.org/en/download/)
+- [SNET CLI](https://github.com/singnet/snet-cli)
 
 ### Development
 
@@ -113,7 +113,7 @@ Url: http://crcv.ucf.edu/THUMOS14/UCF101/UCF101/v_MoppingFloor_g25_c01.avi
 
 Through SingularityNET (follow this [link](https://dev.singularitynet.io/tutorials/publish/) to learn how to publish a service and open a payment channel to be able to call it):
 
-Assuming that you have an open channel (`id: 0`) to this service:
+Assuming that you have an open channel to this service:
 
 ```
 $ snet client call snet i3d-video-action-recognition video_action_recon '{"model": "400", "url": "http://crcv.ucf.edu/THUMOS14/UCF101/UCF101/v_CricketShot_g04_c02.avi"}'
diff --git a/services/places365-scene-recognition/README.md b/services/places365-scene-recognition/README.md
index e2fc267..2a7aefb 100644
--- a/services/places365-scene-recognition/README.md
+++ b/services/places365-scene-recognition/README.md
@@ -1,7 +1,7 @@
 [issue-template]: ../../../../../issues/new?template=BUG_REPORT.md
 [feature-template]: ../../../../../issues/new?template=FEATURE_REQUEST.md
 
-![singnetlogo](../../../docs/assets/singnet-logo.jpg?raw=true 'SingularityNET')
+![singnetlogo](../../docs/assets/singnet-logo.jpg 'SingularityNET')
 
 # Scene Recognition
 
@@ -14,7 +14,7 @@ It is part of our third party [DNN Model Services](https://github.com/singnet/dn
 ### Requirements
 
 - [Python 3.6.5](https://www.python.org/downloads/release/python-365/)
-- [Node 8+ w/npm](https://nodejs.org/en/download/)
+- [SNET CLI](https://github.com/singnet/snet-cli)
 - ResNet pre-trained model and scene recognition attributes related files that are automatically downloaded by running the script for the first time.
 
 ### Development
@@ -121,10 +121,10 @@ Service completed!
 #### Through SingularityNET 
 > Follow this [link](https://github.com/singnet/wiki/blob/master/tutorials/howToPublishService/README.md) to learn how to publish a service and open a payment channel to be able to call it.
 
-Assuming that you have an open channel (`id: 270`) to this service, you need `0` AGI to call the service at its Daemon's endpoint (`54.203.198.53:7019`). The only call method available for this service is `recognize_scene`, which has been defined at its protobuf file. Specifying the URL to an `input_image` and telling the service what to `predict`, the full example call (and its outputs) would be:
+Assuming that you have an open channel to this service, you need `0` AGI to call the service at its Daemon's endpoint (`54.203.198.53:7019`). The only call method available for this service is `recognize_scene`, which has been defined at its protobuf file. Specifying the URL to an `input_image` and telling the service what to `predict`, the full example call (and its outputs) would be:
 
 ```
-$ snet client call 270 0 54.203.198.53:7019 recognize_scene '{"input_image":"https://static1.squarespace.com/static/564783d5e4b077901c4bdc37/t/5a823d47c83025d76ac6ddae/1518484818865/Piccolo-104.jpg?format=1500w", "predict":"io, categories"}'
+$ snet client call snet places365-scene-recognition recognize_scene '{"input_image":"https://static1.squarespace.com/static/564783d5e4b077901c4bdc37/t/5a823d47c83025d76ac6ddae/1518484818865/Piccolo-104.jpg?format=1500w", "predict":"io, categories"}'
 ...
 data: "{\"io\": \"indoor\", \"categories\": \" 0.924 -> beauty_salon, 0.006 -> gymnasium/indoor, 0.005 -> clean_room, 0.005 -> biology_laboratory, 0.004 -> chemistry_lab,\"}"
 ```
diff --git a/services/s2vt-video-captioning/README.md b/services/s2vt-video-captioning/README.md
index 0a67425..7f82a48 100644
--- a/services/s2vt-video-captioning/README.md
+++ b/services/s2vt-video-captioning/README.md
@@ -1,7 +1,7 @@
 [issue-template]: ../../../../../issues/new?template=BUG_REPORT.md
 [feature-template]: ../../../../../issues/new?template=FEATURE_REQUEST.md
 
-![singnetlogo](../../../docs/assets/singnet-logo.jpg?raw=true 'SingularityNET')
+![singnetlogo](../../docs/assets/singnet-logo.jpg 'SingularityNET')
 
 # Sequence to Sequence - Video to Text
 
@@ -14,7 +14,7 @@ It is part of our third party [DNN Model Services](https://github.com/singnet/dn
 ### Requirements
 
 - [Python 2.7](https://www.python.org/downloads/release/python-2715/)
-- [Node 8+ w/npm](https://nodejs.org/en/download/)
+- [SNET CLI](https://github.com/singnet/snet-cli)
 
 ### Development
 
@@ -140,7 +140,7 @@ StopTime (s): 0
 
 Through SingularityNET (follow this [link](https://dev.singularitynet.io/tutorials/publish/) to learn how to publish a service and open a payment channel to be able to call it):
 
-Assuming that you have an open channel (`id: 0`) to this service:
+Assuming that you have an open channel to this service:
 
 ```
 $ snet client call snet s2vt-video-captioning video_cap '{"url": "http://crcv.ucf.edu/THUMOS14/UCF101/UCF101/v_PlayingGuitar_g05_c01.avi", "start_time_sec": "0", "stop_time_sec": "0"}'
diff --git a/services/siggraph-colorization/Dockerfile b/services/siggraph-colorization/Dockerfile
new file mode 100644
index 0000000..074e40b
--- /dev/null
+++ b/services/siggraph-colorization/Dockerfile
@@ -0,0 +1,38 @@
+FROM nightseas/cuda-torch:latest
+
+ARG git_owner="singnet"
+ARG git_repo="dnn-model-services"
+ARG git_branch="master"
+
+ENV SINGNET_REPOS=/opt/singnet
+ENV DNN_REPO_NAME=${git_repo}
+ENV SERVICES_FOLDER=${SINGNET_REPOS}/${DNN_REPO_NAME}/services
+ENV SERVICE_NAME=siggraph-colorization
+
+RUN mkdir -p ${SINGNET_REPOS}
+
+RUN apt-get update && \
+    apt-get install -y \
+    git \
+    wget \
+    nano \
+    curl
+
+RUN apt-get install -y python3 python3-pip
+
+RUN SNETD_VERSION=`curl -s https://api.github.com/repos/singnet/snet-daemon/releases/latest | grep -oP '"tag_name": "\K(.*)(?=")'` && \
+    cd /tmp && \
+    wget https://github.com/singnet/snet-daemon/releases/download/${SNETD_VERSION}/snet-daemon-${SNETD_VERSION}-linux-amd64.tar.gz && \
+    tar -xvf snet-daemon-${SNETD_VERSION}-linux-amd64.tar.gz && \
+    mv snet-daemon-${SNETD_VERSION}-linux-amd64/snetd /usr/bin/snetd
+
+RUN cd ${SINGNET_REPOS} && \
+    git clone -b ${git_branch} https://github.com/${git_owner}/${DNN_REPO_NAME}.git && \
+    cd ${DNN_REPO_NAME}/utils && \
+    sh get_colorize_model.sh
+
+RUN cd ${SERVICES_FOLDER}/${SERVICE_NAME} && \
+    pip3 install -r requirements.txt && \
+    sh buildproto.sh
+
+WORKDIR ${SERVICES_FOLDER}/${SERVICE_NAME}
\ No newline at end of file
diff --git a/services/siggraph-colorization/README.md b/services/siggraph-colorization/README.md
new file mode 100644
index 0000000..0758f3e
--- /dev/null
+++ b/services/siggraph-colorization/README.md
@@ -0,0 +1,132 @@
+[issue-template]: ../../../../../issues/new?template=BUG_REPORT.md
+[feature-template]: ../../../../../issues/new?template=FEATURE_REQUEST.md
+
+![singnetlogo](../../docs/assets/singnet-logo.jpg 'SingularityNET')
+
+# Let there be Color!
+
+This service uses [siggraph2016_colorization](http://iizuka.cs.tsukuba.ac.jp/projects/colorization/en/) to perform 
+automatic image colorization with simultaneous classification.
+
+It is part of our third party [DNN Model Services](https://github.com/singnet/dnn-model-services).
+
+## Getting Started
+
+### Requirements
+
+- [Python 3.6.5](https://www.python.org/downloads/release/python-365/)
+- [SNET CLI](https://github.com/singnet/snet-cli)
+- Pre-trained model (`colornet.t7`)
+
+### Development
+
+Clone this repository and download the models using the `get_colorize_model.sh` script:
+
+```
+$ git clone https://github.com/singnet/dnn-model-services.git
+$ cd dnn-model-services/utils
+$ ./get_colorize_model.sh
+$ ls -la Resources/Models
+total 678421
+drwxrwxr-x 2 user user      4096 Apr 25 08:49 .
+drwxrwxr-x 3 user user      4096 Apr 25 08:49 ..
+-rw-r--r-- 1 root root 694703608 Apr 22  2016 colornet.t7
+$ cd ../services/cntk-image-recon
+```
+
+### Running the service:
+
+To get the `ORGANIZATION_ID` and `SERVICE_ID` you must have already published a service (check this [link](https://dev.singularitynet.io/tutorials/publish/)).
+
+Create the `SNET Daemon`'s config JSON file (`snetd.config.json`).
+
+```
+{
+   "DAEMON_END_POINT": "DAEMON_HOST:DAEMON_PORT",
+   "ETHEREUM_JSON_RPC_ENDPOINT": "JSON_RPC_ENDPOINT",
+   "IPFS_END_POINT": "http://ipfs.singularitynet.io:80",
+   "REGISTRY_ADDRESS_KEY": "REGISTRY_ADDRESS",
+   "PASSTHROUGH_ENABLED": true,
+   "PASSTHROUGH_ENDPOINT": "http://SERVICE_GRPC_HOST:SERVICE_GRPC_PORT",  
+   "ORGANIZATION_ID": "ORGANIZATION_ID",
+   "SERVICE_ID": "SERVICE_ID",
+   "LOG": {
+       "LEVEL": "debug",
+       "OUTPUT": {
+            "TYPE": "stdout"
+           }
+   }
+}
+```
+
+For example (using the Ropsten testnet):
+
+```
+$ cat snetd.config.json
+{
+   "DAEMON_END_POINT": "0.0.0.0:7054",
+   "ETHEREUM_JSON_RPC_ENDPOINT": "https://ropsten.infura.io",
+   "IPFS_END_POINT": "http://ipfs.singularitynet.io:80",
+   "REGISTRY_ADDRESS_KEY": "0x5156fde2ca71da4398f8c76763c41bc9633875e4",
+   "PASSTHROUGH_ENABLED": true,
+   "PASSTHROUGH_ENDPOINT": "http://localhost:7003",
+   "ORGANIZATION_ID": "snet",
+   "SERVICE_ID": "siggraph-colorization",
+   "LOG": {
+       "LEVEL": "debug",
+       "OUTPUT": {
+           "TYPE": "stdout"
+           }
+   }
+}
+```
+
+Note that we set `DAEMON_HOST = 0.0.0.0` because this service will run inside a Docker container.
+
+Install all dependencies:
+```
+$ pip3 install -r requirements.txt
+```
+Generate the gRPC codes:
+```
+$ sh buildproto.sh
+```
+Start the service and `SNET Daemon`:
+```
+$ python3 run_colorize_service.py
+```
+
+### Calling the service:
+
+Inputs:
+  - `gRPC method`: colorize.
+  - `img_input`: An image URL.
+
+Local (testing purpose):
+
+```
+$ python3 test_colorize_service.py 
+Endpoint (localhost:7003): 
+Method (colorize): colorize
+Image (Link): 
+[Base64 Image]
+```
+
+Through SingularityNET (follow this [link](https://dev.singularitynet.io/tutorials/publish/) to learn how to publish a service and open a payment channel to be able to call it):
+
+Assuming that you have an open channel to this service:
+
+```
+$ snet client call snet siggraph-colorization colorize '{"img_input": "https://snet-models.s3.amazonaws.com/bh/Colorize/carnaval.jpg"}'
+
+[Base64 Image]
+
+```
+
+## Contributing and Reporting Issues
+
+Please read our [guidelines](https://dev.singularitynet.io/docs/contribute/contribution-guidelines/#submitting-an-issue) before submitting an issue. If your issue is a bug, please use the bug template pre-populated [here][issue-template]. For feature requests and queries you can use [this template][feature-template].
+
+## Authors
+
+* **Artur Gontijo** - *Maintainer* - [SingularityNET](https://www.singularitynet.io)
\ No newline at end of file
diff --git a/services/siggraph-colorization/buildproto.sh b/services/siggraph-colorization/buildproto.sh
new file mode 100644
index 0000000..f81ce0b
--- /dev/null
+++ b/services/siggraph-colorization/buildproto.sh
@@ -0,0 +1,2 @@
+#! /bin/bash
+python3 -m grpc_tools.protoc -I. --python_out=. --grpc_python_out=. service/service_spec/colorization.proto
\ No newline at end of file
diff --git a/services/siggraph-colorization/colorize.lua b/services/siggraph-colorization/colorize.lua
new file mode 100644
index 0000000..2057154
--- /dev/null
+++ b/services/siggraph-colorization/colorize.lua
@@ -0,0 +1,48 @@
+--[[
+   Copyright (C) <2016> <Satoshi Iizuka, Edgar Simo-Serra, Hiroshi Ishikawa>
+
+   This work is licensed under the Creative Commons
+   Attribution-NonCommercial-ShareAlike 4.0 International License. To view a copy
+   of this license, visit http://creativecommons.org/licenses/by-nc-sa/4.0/ or
+   send a letter to Creative Commons, PO Box 1866, Mountain View, CA 94042, USA.
+
+   Satoshi Iizuka, Waseda University
+   iizuka@aoni.waseda.jp, http://hi.cs.waseda.ac.jp/~iizuka/
+   Edgar Simo-Serra, Waseda University
+   esimo@aoni.waseda.jp, http://hi.cs.waseda.ac.jp/~esimo/
+--]]
+
+
+require 'nn'
+require 'nngraph'
+require 'image'
+
+local infile  = arg[1]
+local outfile = arg[2] or 'out.png'
+local netfile = arg[3] or 'colornet.t7'
+
+local d        = torch.load( netfile )
+local datamean = d.mean
+local model    = d.model:float()
+
+local function pred2rgb( x, data )
+   local I = torch.cat( data[1][{{1},{},{}}]:float(),
+                        data[1]:clone():float():mul(2):add(-1), 1)
+   local O = image.scale( I, x:size(3), x:size(2) )
+   local X = image.rgb2lab( image.yuv2rgb( torch.repeatTensor( x, 3, 1, 1 ) ) )
+   O    = O*100
+   O[1] = X[1]
+   O    = image.rgb2yuv( image.lab2rgb( O ) )
+   return image.yuv2rgb( torch.cat( x, O[{{2,3},{},{}}], 1 ) )
+end
+
+local I = image.load( infile )
+if I:size(1)==3 then I = image.rgb2y(I) end
+local X2 = image.scale( I, torch.round(I:size(3)/8)*8, torch.round(I:size(2)/8)*8 ):add(-datamean):float()
+local X1 = image.scale( X2, 224, 224 ):float()
+X1 = X1:reshape( 1, X1:size(1), X1:size(2), X1:size(3) )
+X2 = X2:reshape( 1, X2:size(1), X2:size(2), X2:size(3) )
+model.forwardnodes[9].data.module.modules[3].nfeatures = X2:size(3)/8
+model.forwardnodes[9].data.module.modules[4].nfeatures = X2:size(4)/8
+
+image.save( outfile, pred2rgb( I:float(), model:forward( {X1, X2} ) ) )
\ No newline at end of file
diff --git a/services/siggraph-colorization/requirements.txt b/services/siggraph-colorization/requirements.txt
new file mode 100644
index 0000000..2c655e6
--- /dev/null
+++ b/services/siggraph-colorization/requirements.txt
@@ -0,0 +1,3 @@
+grpcio>=1.14.2
+grpcio-tools>=1.14.1
+requests==2.20.0
\ No newline at end of file
diff --git a/services/siggraph-colorization/run_colorize_service.py b/services/siggraph-colorization/run_colorize_service.py
new file mode 100644
index 0000000..acbfc55
--- /dev/null
+++ b/services/siggraph-colorization/run_colorize_service.py
@@ -0,0 +1,106 @@
+import sys
+import os
+import signal
+import time
+import subprocess
+import logging
+import pathlib
+import glob
+import json
+import argparse
+
+from service import registry
+
+logging.basicConfig(level=10, format="%(asctime)s - [%(levelname)8s] - %(name)s - %(message)s")
+log = logging.getLogger("run_siggraph_colorization_service")
+
+
+def main():
+    parser = argparse.ArgumentParser(description="Run services")
+    parser.add_argument("--no-daemon", action="store_false", dest="run_daemon", help="do not start the daemon")
+    parser.add_argument("--ssl", action="store_true", dest="run_ssl", help="start the daemon with SSL")
+    args = parser.parse_args()
+    root_path = pathlib.Path(__file__).absolute().parent
+    
+    # All services modules go here
+    service_modules = ["service.siggraph_colorization_service"]
+    
+    # Call for all the services listed in service_modules
+    all_p = start_all_services(root_path, service_modules, args.run_daemon, args.run_ssl)
+    
+    # Continuous checking all subprocess
+    try:
+        while True:
+            for p in all_p:
+                p.poll()
+                if p.returncode and p.returncode != 0:
+                    kill_and_exit(all_p)
+            time.sleep(1)
+    except Exception as e:
+        log.error(e)
+        raise
+
+
+def start_all_services(cwd, service_modules, run_daemon, run_ssl):
+    """
+    Loop through all service_modules and start them.
+    For each one, an instance of Daemon "snetd" is created.
+    snetd will start with configs from "snetd.config.json"
+    """
+    all_p = []
+    for i, service_module in enumerate(service_modules):
+        service_name = service_module.split(".")[-1]
+        log.info("Launching {} on port {}".format(str(registry[service_name]), service_module))
+        all_p += start_service(cwd, service_module, run_daemon, run_ssl)
+    return all_p
+
+
+def start_service(cwd, service_module, run_daemon, run_ssl):
+    """
+    Starts SNET Daemon ("snetd") and the python module of the service
+    at the passed gRPC port.
+    """
+    
+    def add_ssl_configs(conf):
+        """Add SSL keys to snetd.config.json"""
+        with open(conf, "r") as f:
+            snetd_configs = json.load(f)
+            snetd_configs["ssl_cert"] = "/opt/singnet/.certs/fullchain.pem"
+            snetd_configs["ssl_key"] = "/opt/singnet/.certs/privkey.pem"
+        with open(conf, "w") as f:
+            json.dump(snetd_configs, f, sort_keys=True, indent=4)
+    
+    all_p = []
+    if run_daemon:
+        for idx, config_file in enumerate(glob.glob("./snetd_configs/*.json")):
+            if run_ssl:
+                add_ssl_configs(config_file)
+            all_p.append(start_snetd(str(cwd), config_file))
+    service_name = service_module.split(".")[-1]
+    grpc_port = registry[service_name]["grpc"]
+    p = subprocess.Popen([sys.executable, "-m", service_module, "--grpc-port", str(grpc_port)], cwd=str(cwd))
+    all_p.append(p)
+    return all_p
+
+
+def start_snetd(cwd, config_file=None):
+    """
+    Starts the Daemon "snetd":
+    """
+    cmd = ["snetd", "serve"]
+    if config_file:
+        cmd = ["snetd", "serve", "--config", config_file]
+    return subprocess.Popen(cmd, cwd=str(cwd))
+
+
+def kill_and_exit(all_p):
+    for p in all_p:
+        try:
+            os.kill(p.pid, signal.SIGTERM)
+        except Exception as e:
+            log.error(e)
+    exit(1)
+
+
+if __name__ == "__main__":
+    main()
diff --git a/services/siggraph-colorization/service/__init__.py b/services/siggraph-colorization/service/__init__.py
new file mode 100644
index 0000000..c9487b4
--- /dev/null
+++ b/services/siggraph-colorization/service/__init__.py
@@ -0,0 +1,5 @@
+registry = {
+    "siggraph_colorization_service": {
+        "grpc": 7013,
+    },
+}
\ No newline at end of file
diff --git a/services/siggraph-colorization/service/common.py b/services/siggraph-colorization/service/common.py
new file mode 100644
index 0000000..21aa4e5
--- /dev/null
+++ b/services/siggraph-colorization/service/common.py
@@ -0,0 +1,29 @@
+import argparse
+import os.path
+import time
+
+from service import registry
+
+
+def common_parser(script_name):
+    parser = argparse.ArgumentParser(prog=script_name)
+    service_name = os.path.splitext(os.path.basename(script_name))[0]
+    parser.add_argument("--grpc-port",
+                        help="port to bind gRPC service to",
+                        default=registry[service_name]['grpc'],
+                        type=int,
+                        required=False)
+    return parser
+
+
+# From gRPC docs:
+# Because start() does not block you may need to sleep-loop if there is nothing
+# else for your code to do while serving.
+def main_loop(grpc_handler, args):
+    server = grpc_handler(port=args.grpc_port)
+    server.start()
+    try:
+        while True:
+            time.sleep(1)
+    except KeyboardInterrupt:
+        server.stop(0)
diff --git a/services/siggraph-colorization/service/service_spec/colorization.proto b/services/siggraph-colorization/service/service_spec/colorization.proto
new file mode 100644
index 0000000..b552129
--- /dev/null
+++ b/services/siggraph-colorization/service/service_spec/colorization.proto
@@ -0,0 +1,13 @@
+syntax = "proto3";
+
+message Input {
+    string img_input = 1;
+}
+
+message Output {
+    string img_colorized = 1;
+}
+
+service Colorization {
+    rpc colorize(Input) returns (Output) {}
+}
\ No newline at end of file
diff --git a/services/siggraph-colorization/service/siggraph_colorization.py b/services/siggraph-colorization/service/siggraph_colorization.py
new file mode 100644
index 0000000..1251e7b
--- /dev/null
+++ b/services/siggraph-colorization/service/siggraph_colorization.py
@@ -0,0 +1,90 @@
+import os
+import requests
+import hashlib
+import datetime
+import subprocess
+import base64
+import logging
+import traceback
+
+logging.basicConfig(level=10, format="%(asctime)s - [%(levelname)8s] - %(name)s - %(message)s")
+log = logging.getLogger("siggraph_colorization")
+
+
+class Colorization:
+    def __init__(self, img_input):
+        self.img_input = img_input
+        self.response = dict()
+
+    @staticmethod
+    def _is_base64(sb):
+        try:
+            if type(sb) == str:
+                sb_bytes = bytes(sb, 'ascii')
+            elif type(sb) == bytes:
+                sb_bytes = sb
+            else:
+                raise ValueError("Argument must be string or bytes")
+            return base64.b64encode(base64.b64decode(sb_bytes)) == sb_bytes
+        except Exception as e:
+            log.error("Not Base64: " + str(e))
+            return False
+    
+    @staticmethod
+    def _generate_uid():
+        # Setting a hash accordingly to the timestamp
+        seed = "{}".format(datetime.datetime.now())
+        m = hashlib.sha256()
+        m.update(seed.encode("utf-8"))
+        m = m.hexdigest()
+        # Returns only the first and the last 10 hex
+        return m[:10] + m[-10:]
+
+    def colorize(self):
+
+        try:
+            uid = self._generate_uid()
+            input_file = uid + "_input.png"
+            output_img = uid + ".png"
+            
+            # Link
+            if "http://" in self.img_input or "https://" in self.img_input:
+                log.info("Got an URL, downloading...")
+                header = {'User-Agent': 'Mozilla/5.0 (Windows NT x.y; Win64; x64; rv:9.0) Gecko/20100101 Firefox/10.0'}
+                r = requests.get(self.img_input, headers=header, allow_redirects=True)
+                with open(input_file, "wb") as fd:
+                    fd.write(r.content)
+                log.info("Done!")
+                
+            # Base64
+            elif len(self.img_input) > 1000:
+                log.info("Got a base64 image data, saving...")
+                with open(input_file, "wb") as fd:
+                    fd.write(base64.b64decode(self.img_input))
+                log.info("Done!")
+
+            resources_root = os.path.join("..", "..", "utils", "Resources")
+            colorize_model = os.path.join(resources_root, "Models", "colornet.t7")
+            p = subprocess.Popen(["th",
+                                  "colorize.lua",
+                                  input_file,
+                                  output_img,
+                                  colorize_model])
+            p.wait()
+
+            self.response["img_colorized"] = "Fail"
+            with open(output_img, "rb") as base64_file:
+                self.response["img_colorized"] = base64.b64encode(base64_file.read())
+
+            if os.path.exists(input_file):
+                os.remove(input_file)
+            if os.path.exists(output_img):
+                os.remove(output_img)
+
+            return self.response
+
+        except Exception as e:
+            log.error(e)
+            traceback.print_exc()
+            self.response["img_colorized"] = "Fail"
+            return self.response
diff --git a/services/siggraph-colorization/service/siggraph_colorization_service.py b/services/siggraph-colorization/service/siggraph_colorization_service.py
new file mode 100644
index 0000000..3b33674
--- /dev/null
+++ b/services/siggraph-colorization/service/siggraph_colorization_service.py
@@ -0,0 +1,69 @@
+import sys
+import time
+import logging
+import traceback
+
+import grpc
+import concurrent.futures as futures
+
+import service.common
+from service.siggraph_colorization import Colorization
+
+# Importing the generated codes from buildproto.sh
+import service.service_spec.colorization_pb2_grpc as grpc_bt_grpc
+from service.service_spec.colorization_pb2 import Output
+
+logging.basicConfig(level=10, format="%(asctime)s - [%(levelname)8s] - %(name)s - %(message)s")
+log = logging.getLogger("siggraph_colorization_service")
+
+
+# Create a class to be added to the gRPC server
+# derived from the protobuf codes.
+class ColorizationServicer(grpc_bt_grpc.ColorizationServicer):
+    def __init__(self):
+        self.response = Output()
+        log.debug("ColorizationServicer created")
+
+    # The method that will be exposed to the snet-cli call command.
+    # request: incoming data
+    # context: object that provides RPC-specific information (timeout, etc).
+    def colorize(self, request, context):
+        try:
+            sig_colorize = Colorization(request.img_input)
+            tmp_response = sig_colorize.colorize()
+
+            # To respond we need to fill this "img_colorized" field of Output() object (from .proto file)
+            self.response.img_colorized = tmp_response["img_colorized"]
+
+            log.debug("translate({})={}".format(request.img_input[:50], self.response.img_colorized[:50]))
+            return self.response
+
+        except Exception as e:
+            traceback.print_exc()
+            log.error(e)
+            self.response.img_colorized = "Fail"
+            return self.response
+
+
+# The gRPC serve function.
+#
+# Params:
+# max_workers: pool of threads to execute calls asynchronously
+# port: gRPC server port
+#
+# Add all your classes to the server here.
+# (from generated .py files by protobuf compiler)
+def serve(max_workers=10, port=7777):
+    server = grpc.server(futures.ThreadPoolExecutor(max_workers=max_workers))
+    grpc_bt_grpc.add_ColorizationServicer_to_server(ColorizationServicer(), server)
+    server.add_insecure_port("[::]:{}".format(port))
+    return server
+
+
+if __name__ == "__main__":
+    """
+    Runs the gRPC server to communicate with the Snet Daemon.
+    """
+    parser = service.common.common_parser(__file__)
+    args = parser.parse_args(sys.argv[1:])
+    service.common.main_loop(serve, args)
diff --git a/services/siggraph-colorization/snetd_configs/snetd.mainnet b/services/siggraph-colorization/snetd_configs/snetd.mainnet
new file mode 100644
index 0000000..3e999de
--- /dev/null
+++ b/services/siggraph-colorization/snetd_configs/snetd.mainnet
@@ -0,0 +1,38 @@
+{
+  "daemon_end_point": "0.0.0.0:7035",
+  "ethereum_json_rpc_endpoint": "https://mainnet.infura.io",
+  "ipfs_end_point": "http://ipfs.singularitynet.io:80",
+  "registry_address_key": "0xb3180a92e210b45e3447976a412ac0df859febaf",
+  "passthrough_enabled": true,
+  "passthrough_endpoint": "http://localhost:7013",
+  "organization_id": "snet",
+  "service_id": "siggraph-colorization",
+
+  "payment_channel_storage_server": {
+    "id": "storage-mainnet",
+    "host": "127.0.0.1",
+    "client_port": 2379,
+    "peer_port": 2380,
+    "token": "unique-token",
+    "cluster": "storage-mainnet=http://127.0.0.1:2380",
+    "data_dir": "etcd/storage-data-dir-mainnet.etcd",
+    "enabled": true
+  },
+
+  "payment_channel_storage_client": {
+    "connection_timeout": "5s",
+    "request_timeout": "3s",
+    "endpoints": ["http://127.0.0.1:2379"]
+  },
+
+  "log": {
+    "level": "debug",
+    "output": {
+      "current_link": "./snetd-mainnet.log",
+      "file_pattern": "./snetd-mainnet.%Y%m%d.log",
+      "rotation_count": 0,
+      "rotation_time_in_sec": 86400,
+      "type": "file"
+    }
+  }
+}
\ No newline at end of file
diff --git a/services/siggraph-colorization/snetd_configs/snetd.ropsten.json b/services/siggraph-colorization/snetd_configs/snetd.ropsten.json
new file mode 100644
index 0000000..0aa76f4
--- /dev/null
+++ b/services/siggraph-colorization/snetd_configs/snetd.ropsten.json
@@ -0,0 +1,38 @@
+{
+  "daemon_end_point": "0.0.0.0:7085",
+  "ethereum_json_rpc_endpoint": "https://ropsten.infura.io",
+  "ipfs_end_point": "http://ipfs.singularitynet.io:80",
+  "registry_address_key": "0x5156fde2ca71da4398f8c76763c41bc9633875e4",
+  "passthrough_enabled": true,
+  "passthrough_endpoint": "http://localhost:7013",
+  "organization_id": "snet",
+  "service_id": "siggraph-colorization",
+
+  "payment_channel_storage_server": {
+    "id": "storage-ropsten",
+    "host": "127.0.0.1",
+    "client_port": 2381,
+    "peer_port": 2382,
+    "token": "unique-token",
+    "cluster": "storage-ropsten=http://127.0.0.1:2382",
+    "data_dir": "etcd/storage-data-dir-ropsten.etcd",
+    "enabled": true
+  },
+
+  "payment_channel_storage_client": {
+    "connection_timeout": "5s",
+    "request_timeout": "3s",
+    "endpoints": ["http://127.0.0.1:2381"]
+  },
+
+  "log": {
+    "level": "debug",
+    "output": {
+      "current_link": "./snetd-ropsten.log",
+      "file_pattern": "./snetd-ropsten.%Y%m%d.log",
+      "rotation_count": 0,
+      "rotation_time_in_sec": 86400,
+      "type": "file"
+    }
+  }
+}
\ No newline at end of file
diff --git a/services/siggraph-colorization/test_colorize_service.py b/services/siggraph-colorization/test_colorize_service.py
new file mode 100644
index 0000000..bd664d9
--- /dev/null
+++ b/services/siggraph-colorization/test_colorize_service.py
@@ -0,0 +1,48 @@
+import sys
+import grpc
+
+# import the generated classes
+import service.service_spec.colorization_pb2_grpc as grpc_bt_grpc
+import service.service_spec.colorization_pb2 as grpc_bt_pb2
+
+from service import registry
+
+TEST_URL = "https://raw.githubusercontent.com/singnet/dnn-model-services/master/docs/assets/users_guide/rose.jpg"
+
+if __name__ == "__main__":
+
+    try:
+        test_flag = False
+        if len(sys.argv) == 2:
+            if sys.argv[1] == "auto":
+                test_flag = True
+
+        endpoint = input("Endpoint (localhost:{}): ".format(registry["siggraph_colorization_service"]["grpc"])) if not test_flag else ""
+        if endpoint == "":
+            endpoint = "localhost:{}".format(registry["siggraph_colorization_service"]["grpc"])
+
+        # open a gRPC channel
+        channel = grpc.insecure_channel("{}".format(endpoint))
+
+        grpc_method = input("Method (colorize): ") if not test_flag else "colorize"
+        if grpc_method == "":
+            grpc_method = "colorize"
+
+        img_input = input("Image (Link): ") if not test_flag else TEST_URL
+
+        stub = grpc_bt_grpc.ColorizationStub(channel)
+        number = grpc_bt_pb2.Input(img_input=img_input)
+
+        if grpc_method == "colorize":
+            response = stub.colorize(number)
+            print(response.img_colorized)
+
+            if response.img_colorized == "Fail":
+                exit(1)
+        else:
+            print("Invalid method!")
+            exit(1)
+
+    except Exception as e:
+        print(e)
+        exit(1)
diff --git a/services/yolov3-object-detection/README.md b/services/yolov3-object-detection/README.md
index 3e412cc..35bd064 100644
--- a/services/yolov3-object-detection/README.md
+++ b/services/yolov3-object-detection/README.md
@@ -1,7 +1,7 @@
 [issue-template]: ../../../../../issues/new?template=BUG_REPORT.md
 [feature-template]: ../../../../../issues/new?template=FEATURE_REQUEST.md
 
-![singnetlogo](../../../docs/assets/singnet-logo.jpg?raw=true 'SingularityNET')
+![singnetlogo](../../docs/assets/singnet-logo.jpg 'SingularityNET')
 
 # Object Detection
 
@@ -14,7 +14,7 @@ It is part of our third party [DNN Model Services](https://github.com/singnet/dn
 ### Requirements
 
 - [Python 3.6.5](https://www.python.org/downloads/release/python-365/)
-- [Node 8+ w/npm](https://nodejs.org/en/download/)
+- [SNET CLI](https://github.com/singnet/snet-cli)
 - YOLOv3 files: `yolov3.weights` and `yolov3.cfg`
 
 ### Development
@@ -118,7 +118,7 @@ confidences: "[0.9988894462585449, 0.9795901775360107, 0.9754813313484192]"
 
 Through SingularityNET (follow this [link](https://dev.singularitynet.io/tutorials/publish/) to learn how to publish a service and open a payment channel to be able to call it):
 
-Assuming that you have an open channel (`id: 0`) to this service:
+Assuming that you have an open channel to this service:
 
 ```
 $ snet client call snet yolov3-object-detection detect '{"model": "yolov3", "img_path": "https://hips.hearstapps.com/amv-prod-cad-assets.s3.amazonaws.com/images/media/51/2017-10best-lead-photo-672628-s-original.jpg", "confidence": "0.5"}'
diff --git a/services/zeta36-chess-alpha-zero/README.md b/services/zeta36-chess-alpha-zero/README.md
index 65c5684..8b5b134 100644
--- a/services/zeta36-chess-alpha-zero/README.md
+++ b/services/zeta36-chess-alpha-zero/README.md
@@ -1,7 +1,7 @@
 [issue-template]: ../../../../../issues/new?template=BUG_REPORT.md
 [feature-template]: ../../../../../issues/new?template=FEATURE_REQUEST.md
 
-![singnetlogo](../../../docs/assets/singnet-logo.jpg?raw=true 'SingularityNET')
+![singnetlogo](../../docs/assets/singnet-logo.jpg 'SingularityNET')
 
 # Chess Alpha Zero
 
@@ -15,7 +15,7 @@ It is part of our third party [DNN Model Services](https://github.com/singnet/dn
 ### Requirements
 
 - [Python 3.6.5](https://www.python.org/downloads/release/python-365/)
-- [Node 8+ w/npm](https://nodejs.org/en/download/)
+- [SNET CLI](https://github.com/singnet/snet-cli)
 
 ### Development
 
@@ -188,7 +188,7 @@ status: game_running: g7g6
 
 Through SingularityNET (follow this [link](https://dev.singularitynet.io/tutorials/publish/) to learn how to publish a service and open a payment channel to be able to call it):
 
-Assuming that you have an open channel (`id: 0`) to this service:
+Assuming that you have an open channel to this service:
 
 ```
 $ snet client call snet zeta36-chess-alpha-zero play '{"move": "g1f3"}'
diff --git a/utils/get_colorize_model.sh b/utils/get_colorize_model.sh
new file mode 100644
index 0000000..bd38090
--- /dev/null
+++ b/utils/get_colorize_model.sh
@@ -0,0 +1,32 @@
+#!/bin/bash
+
+DIR="./Resources/Models"
+if [ ! -d "$DIR" ]; then
+    mkdir -p ${DIR}
+fi
+
+cd ${DIR}
+
+# md5sum c88fa2bb6dc9f942a492a7dc7009b966
+# sha1sum d397faf0b63a173680824474bfeab4725c375ca2
+FILENAME="colornet.t7"
+FILEURL="http://hi.cs.waseda.ac.jp/~iizuka/data/colornet.t7"
+FILEMD5="c88fa2bb6dc9f942a492a7dc7009b966"
+
+echo "Downloading the colorization model (663M)..."
+wget --continue -O "$FILENAME" -- "$FILEURL"
+
+echo "Checking integrity (md5sum)..."
+OS=`uname -s`
+if [ "$OS" = "Darwin" ]; then
+  CHECKSUM=`cat $FILENAME | md5`
+  else
+  CHECKSUM=`md5sum $FILENAME | awk '{ print $1 }'`
+fi
+
+if [ "$CHECKSUM" != "$FILEMD5" ]; then
+  echo "Integrity check failed. File is corrupt!"
+  echo "Try running this script again and if it fails remove '$FILENAME' before trying again."
+  exit 1
+fi
+echo -e "Download finished successfully! Time to \e[31mc\e[32mo\e[33m\e[34ml\e[35mo\e[36mr\e[37mi\e[91mz\e[92me\e[93m\e[94m!\e[m"
\ No newline at end of file