Remove dependency on opencv

Dockerfile

@@ -4,12 +4,11 @@ ENV CUDA_PATH /usr/local/cuda
 ENV PATH ${ANACONDA}/bin:${CUDA_PATH}/bin:$PATH
 ENV LD_LIBRARY_PATH ${ANACONDA}/lib:${CUDA_PATH}/bin64:$LD_LIBRARY_PATH
 ENV C_INCLUDE_PATH ${CUDA_PATH}/include
-RUN apt-get update && apt-get install -y wget build-essential axel imagemagick python-opencv
+RUN apt-get update && apt-get install -y wget build-essential axel imagemagick
 RUN wget https://repo.continuum.io/archive/Anaconda2-5.0.1-Linux-x86_64.sh -P /tmp
 RUN bash /tmp/Anaconda2-5.0.1-Linux-x86_64.sh -b -p $ANACONDA
 RUN rm /tmp/Anaconda2-5.0.1-Linux-x86_64.sh -rf
 RUN conda install -y pytorch=0.3.0 torchvision cuda90 -c pytorch
-RUN conda install -y -c menpo opencv3
 RUN pip install scikit-umfpack
 RUN pip install cupy
 RUN pip install pynvrtc

USAGE.md

@@ -19,7 +19,6 @@ We only tested our code in the following environment.
 - Install requirement
   - `sudo apt-get install -y axel imagemagick` (Only used for demo)
   - `conda install pytorch=0.3.0 torchvision cuda90 -y -c pytorch`
-  - `conda install -y -c menpo opencv3`
   - `pip install scikit-umfpack`
   - `pip install -U setuptools`
   - `pip install cupy`