diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..5c9a041
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,12 @@
+FROM python:3.10
+
+WORKDIR /app
+
+COPY pyproject.toml poetry.lock ./
+
+RUN pip install poetry
+RUN poetry install --no-dev
+
+COPY . .
+
+CMD ["python", "-m", "unittest"]
diff --git a/picasso_workflow/analyse.py b/picasso_workflow/analyse.py
index 61b9c3f..8d9a4fa 100644
--- a/picasso_workflow/analyse.py
+++ b/picasso_workflow/analyse.py
@@ -657,6 +657,52 @@ def _plot_locs_vs_frame(self, filename):
         plt.close(fig)
         return results
 
+    @module_decorator
+    def export_brightfield(self, i, parameters, results):
+        """Opens a single-plane tiff image and saves it to png with
+        contrast adjustment.
+
+        Args:
+            i : int
+                the module index in the protocol
+            parameters : dict
+                necessary items:
+                    filepath : str or list of str
+                        the tiff file(s) to load. The converted file(s) will
+                        have the same name, but with .png extension
+                optional items:
+                    min_quantile : float, default: 0
+                        the quantile below which pixels are shown black
+                    max_quantile : float, default: 1
+                        the quantile above which pixels are shown white
+            results : dict
+                the results dict, created by the module_decorator
+        Returns:
+            parameters : dict
+                as input, potentially changed values, for consistency
+            results : dict
+                the analysis results
+                    filename : the png file
+        """
+        fps_in = parameters["filepath"]
+        if isinstance(fps_in, str):
+            fps_in = [fps_in]
+        fps_out = []
+        for fp in fps_in:
+            mov, _ = io.load_movie(fp)
+            frame = mov[0]
+            fn = os.path.split(fp)[1]
+            fn = os.path.splitext(fn)[0] + ".png"
+            fp = os.path.join(results["folder"], fn)
+            fps_out.append(fp)
+            min_quantile = parameters.get("min_quantile", 0)
+            max_quantile = parameters.get("max_quantile", 1)
+            process_brightfield.save_frame(
+                fp, frame, min_quantile, max_quantile
+            )
+        results["filenames"] = fps_out
+        return parameters, results
+
     @module_decorator
     def undrift_rcc(self, i, parameters, results):
         """Undrifts localized data using redundant cross correlation.
diff --git a/picasso_workflow/confluence.py b/picasso_workflow/confluence.py
index 3466746..8f88a88 100644
--- a/picasso_workflow/confluence.py
+++ b/picasso_workflow/confluence.py
@@ -227,6 +227,34 @@ def localize(self, i, parameters, results):
                 os.path.split(res["filename"])[1],
             )
 
+    def export_brightfield(self, i, parameters, results):
+        """Describes the export_brightfield section of picasso
+        Args:
+        """
+        logger.debug("Reporting export_brightfield.")
+        text = """
+        <ac:layout><ac:layout-section ac:type="single"><ac:layout-cell>
+        <p><strong>Exporting Brightfield</strong></p>
+        <ul>
+        """
+        text += f"""
+        <li>Start Time: {results['start time']}</li>
+        <li>Duration: {results["duration"] // 60:.0f} min
+        {(results["duration"] % 60):.02f} s</li></ul>
+        </ac:layout-cell></ac:layout-section></ac:layout>
+        """
+        self.ci.update_page_content(
+            self.report_page_name, self.report_page_id, text
+        )
+
+        for fp in results.get("filepaths"):
+            self.ci.upload_attachment(self.report_page_id, fp)
+            self.ci.update_page_content_with_image_attachment(
+                self.report_page_name,
+                self.report_page_id,
+                os.path.split(fp)[1],
+            )
+
     def undrift_rcc(self, i, parameters, results):
         """Describes the Localize section of picasso
         Args:
diff --git a/picasso_workflow/process_brightfield.py b/picasso_workflow/process_brightfield.py
index 68bb2e8..508bdae 100644
--- a/picasso_workflow/process_brightfield.py
+++ b/picasso_workflow/process_brightfield.py
@@ -8,6 +8,7 @@
 """
 import logging
 from moviepy.editor import ImageSequenceClip
+from imageio import imsave  # package is dependency of moviepy
 import numpy as np
 
 logger = logging.getLogger(__name__)
@@ -62,3 +63,23 @@ def save_movie(fname, movie, min_quantile=0, max_quantile=1, fps=1):
     # Create movie file
     clip = ImageSequenceClip(adjusted_images, fps=fps)
     clip.write_videofile(fname, verbose=False)  # , codec='mpeg4')
+
+
+def save_frame(pathname, frame, min_quantile=0, max_quantile=1):
+    """Save a grayscale frame to png
+    Args:
+        pathname : str
+            the file name to save
+        frame : 2D np array (x,y)
+            the frame to save
+        min_quantile : float, default: 0
+            the quantile below which pixels are shown black
+        max_quantile : float, default: 1
+            the quantile above which pixels are shown white
+    """
+    logger.debug(frame.shape)
+    adjusted_frame = adjust_contrast(
+        frame, min_quantile, max_quantile
+    )  # [..., np.newaxis]
+    logger.debug(adjusted_frame.shape)
+    imsave(pathname, adjusted_frame)
diff --git a/picasso_workflow/tests/test_analyse.py b/picasso_workflow/tests/test_analyse.py
index 4130845..761723d 100644
--- a/picasso_workflow/tests/test_analyse.py
+++ b/picasso_workflow/tests/test_analyse.py
@@ -178,6 +178,19 @@ def localize(self, mock_get_spots, mock_fit_spot, mock_locs_from_fits):
 
         shutil.rmtree(os.path.join(self.results_folder, "00_localize"))
 
+    @patch("picasso_workflow.analyse.io.load_movie")
+    def export_brightfield(self, mock_load):
+        frame = np.random.randint(0, 1000, size=(1, 32, 32))
+        mock_load.return_value = (frame, [])
+
+        parameters = {"filepath": "myfp.ome.tiff"}
+
+        parameters, results = self.ap.export_brightfield(0, parameters)
+
+        shutil.rmtree(
+            os.path.join(self.results_folder, "00_export_brightfield")
+        )
+
     @patch("picasso_workflow.analyse.postprocess.undrift")
     def undrift_rcc(self, mock_undrift_rcc):
         nspots = 5
diff --git a/picasso_workflow/tests/test_confluence.py b/picasso_workflow/tests/test_confluence.py
index fe86a16..dcee92c 100644
--- a/picasso_workflow/tests/test_confluence.py
+++ b/picasso_workflow/tests/test_confluence.py
@@ -233,6 +233,22 @@ def localize(self):
         )
         self.cr.ci.delete_page(pgid)
 
+    # @unittest.skip("")
+    def export_brightfield(self):
+        parameters = {}
+        results = {
+            "start time": "now",
+            "duration": 16.4,
+            "filepaths": ["myfp.png"],
+        }
+        self.cr.export_brightfield(0, parameters, results)
+
+        # clean up
+        pgid, pgtitle = self.cr.ci.get_page_properties(
+            self.cr.report_page_name
+        )
+        self.cr.ci.delete_page(pgid)
+
     # @unittest.skip("")
     def undrift_rcc(self):
         parameters = {
diff --git a/picasso_workflow/util.py b/picasso_workflow/util.py
index 8b7293d..93b0c41 100644
--- a/picasso_workflow/util.py
+++ b/picasso_workflow/util.py
@@ -56,6 +56,12 @@ def localize(self):
         """Localizes Spots previously identified."""
         pass
 
+    @abc.abstractmethod
+    def export_brightfield(self):
+        """Opens a single-plane tiff image and saves it to png with
+        contrast adjustment."""
+        pass
+
     @abc.abstractmethod
     def undrift_rcc(self):
         """Undrifts localized data using redundant cross correlation."""