Docker image for RPI ZERO with OpenCV4 and friends...

Dockerfile

FROM balenalib/rpi-raspbian:stretch

# This is responsible for making your current docker work with arm images:
# $ sudo apt install qemu qemu-user-static binfmt-support-

# And this line is responsible for enabling it (MUST run after a restart):
# $ docker run --privileged linuxkit/binfmt:v0.7
  
RUN apt-get update
RUN apt-get upgrade -y

RUN apt-get install -y --fix-missing wget unzip

ENV OPENCV_VERSION=4.1.0 

RUN cd /opt && \
  wget https://github.com/opencv/opencv/archive/${OPENCV_VERSION}.zip && \
  unzip ${OPENCV_VERSION}.zip && \
  rm -rf ${OPENCV_VERSION}.zip

# opencv_contrib
RUN cd /opt && \
  wget https://github.com/opencv/opencv_contrib/archive/${OPENCV_VERSION}.zip && \
  unzip ${OPENCV_VERSION}.zip && \
  rm -rf ${OPENCV_VERSION}.zip


RUN apt-get install -y --fix-missing build-essential cmake pkg-config
RUN apt-get install -y --fix-missing python3 python3-dev python3-pip python3-setuptools python3-wheel
RUN apt-get install -y --fix-missing python3-numpy

RUN apt-get install -y --fix-missing libjpeg-dev libpng-dev libtiff5-dev libtiff-dev
RUN apt-get install -y --fix-missing libxine2-dev libv4l-dev
RUN cd /usr/include/linux && ln -s -f ../libv4l1-videodev.h videodev.h

RUN apt-get install -y --fix-missing libavcodec-dev \
libavformat-dev \
libswscale-dev \ 
libxvidcore-dev \
libx264-dev \
libavresample-dev \
libjasper-dev \
libgstreamer1.0-dev \
libgstreamer-plugins-base1.0-dev \
libtbb-dev \
libhdf5-dev \
v4l-utils \
ffmpeg

RUN apt-get install -y --fix-missing libeigen3-dev 
RUN apt-get install -y --fix-missing gfortran 
RUN apt-get install -y --fix-missing libatlas-base-dev liblapack-dev libblas-dev liblapacke-dev

# https://github.com/opencv/opencv/issues/12957
# RUN apt-get install -y --fix-missing libopenblas-dev libopenblas-base 
# However, cmake still can't find, so I will stick to libatlas for now...

RUN apt-get install -y --fix-missing libprotobuf-dev protobuf-compiler libgoogle-glog-dev libgflags-dev

RUN apt-get clean && rm -rf /tmp/* /var/tmp/*

RUN mkdir -p /opt/opencv-${OPENCV_VERSION}/build && \
  cd /opt/opencv-${OPENCV_VERSION}/build && \
  cmake \
  -D OPENCV_EXTRA_MODULES_PATH=/opt/opencv_contrib-${OPENCV_VERSION}/modules \
  -D CMAKE_BUILD_TYPE=RELEASE \
  -D CMAKE_INSTALL_PREFIX=/usr/local \
  -D WITH_FFMPEG=ON \
#   -D WITH_IPP=NO \
#   -D WITH_OPENEXR=NO \
  -D WITH_OPENGLES=ON \
  # RPI ZERO doesn't has full OPENGL, but OPENGLES.
  -D ENABLE_NEON=NO \
  -D ENABLE_VFPV3=NO \  
  # RPI ZERO doesn't has NEON or VFPV3
  -D OPENCV_ENABLE_NONFREE=ON \
  -D WITH_QT=OFF \
  -D WITH_GTK=OFF \
  -D WITH_CUDA=OFF \
  -D BUILD_opencv_java=OFF \
  -D BUILD_JAVA=NO \
#   -D WITH_TBB=NO \
  -D BUILD_EXAMPLES=NO \
  -D BUILD_ANDROID_EXAMPLES=NO \
  -D INSTALL_PYTHON_EXAMPLES=NO \
  -D BUILD_DOCS=NO \
  -D BUILD_opencv_python2=NO \
  -D BUILD_opencv_python3=ON \
  # Protobuf generates compilation errors if I try to use the 
  # installed stuff by passing the arguments below:
#   -D BUILD_PROTOBUF=OFF \
#   -D PROTOBUF_UPDATE_FILES=ON \
#   -D WITH_GSTREAMER=OFF \
  # ADE was always failing to compile on alpine...
#   -D BUILD_opencv_gapi=OFF \
#   -D WITH_ADE=OFF \
# All the things below will be automatically found...
#   -D PYTHON3_EXECUTABLE=/usr/local/bin/python \
#   -D PYTHON3_INCLUDE_DIR=/usr/local/include/python3.6m/ \
#   -D PYTHON3_LIBRARY=/usr/local/lib/libpython3.so \
#   -D PYTHON_LIBRARY=/usr/local/lib/libpython3.so \
#   -D PYTHON3_PACKAGES_PATH=/usr/local/lib/python3.6/site-packages/ \
#   -D PYTHON3_NUMPY_INCLUDE_DIRS=/usr/local/lib/python3.6/site-packages/numpy/core/include/ \
  .. 

# -- General configuration for OpenCV 4.1.0 =====================================
# --   Version control:               unknown
# -- 
# --   Extra modules:
# --     Location (extra):            /opt/opencv_contrib-4.1.0/modules
# --     Version control (extra):     unknown
# -- 
# --   Platform:
# --     Timestamp:                   2019-06-20T14:15:21Z
# --     Host:                        Linux 4.18.0-21-generic armv6l
# --     CMake:                       3.7.2
# --     CMake generator:             Unix Makefiles
# --     CMake build tool:            /usr/bin/make
# --     Configuration:               RELEASE
# -- 
# --   CPU/HW features:
# --     Baseline:
# --       requested:                 DETECT
# --       disabled:                  VFPV3 NEON
# -- 
# --   C/C++:
# --     Built as dynamic libs?:      YES
# --     C++ Compiler:                /usr/bin/c++  (ver 6.3.0)
# --     C++ flags (Release):         -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wuninitialized -Winit-self -Wno-delete-non-virtual-dtor -Wno-comment -fdiagnostics-show-option -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections  -mfp16-format=ieee -fvisibility=hidden -fvisibility-inlines-hidden -O3 -DNDEBUG  -DNDEBUG
# --     C++ flags (Debug):           -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wuninitialized -Winit-self -Wno-delete-non-virtual-dtor -Wno-comment -fdiagnostics-show-option -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections  -mfp16-format=ieee -fvisibility=hidden -fvisibility-inlines-hidden -g  -O0 -DDEBUG -D_DEBUG
# --     C Compiler:                  /usr/bin/cc
# --     C flags (Release):           -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wuninitialized -Winit-self -Wno-comment -fdiagnostics-show-option -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections  -mfp16-format=ieee -fvisibility=hidden -O3 -DNDEBUG  -DNDEBUG
# --     C flags (Debug):             -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wuninitialized -Winit-self -Wno-comment -fdiagnostics-show-option -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections  -mfp16-format=ieee -fvisibility=hidden -g  -O0 -DDEBUG -D_DEBUG
# --     Linker flags (Release):      -Wl,--gc-sections  
# --     Linker flags (Debug):        -Wl,--gc-sections  
# --     ccache:                      NO
# --     Precompiled headers:         YES
# --     Extra dependencies:          dl m pthread rt
# --     3rdparty dependencies:
# -- 
# --   OpenCV modules:
# --     To be built:                 aruco bgsegm bioinspired calib3d ccalib core datasets dnn dnn_objdetect dpm face features2d flann fuzzy gapi hdf hfs highgui img_hash imgcodecs imgproc line_descriptor ml objdetect optflow phase_unwrapping photo plot python3 quality reg rgbd saliency sfm shape stereo stitching structured_light superres surface_matching text tracking ts video videoio videostab xfeatures2d ximgproc xobjdetect xphoto
# --     Disabled:                    world
# --     Disabled by dependency:      -
# --     Unavailable:                 cnn_3dobj cudaarithm cudabgsegm cudacodec cudafeatures2d cudafilters cudaimgproc cudalegacy cudaobjdetect cudaoptflow cudastereo cudawarping cudev cvv freetype java js matlab ovis python2 viz
# --     Applications:                tests perf_tests apps
# --     Documentation:               NO
# --     Non-free algorithms:         YES
# -- 
# --   GUI: 
# --     VTK support:                 NO
# -- 
# --   Media I/O: 
# --     ZLib:                        /usr/lib/arm-linux-gnueabihf/libz.so (ver 1.2.8)
# --     JPEG:                        /usr/lib/arm-linux-gnueabihf/libjpeg.so (ver 62)
# --     WEBP:                        build (ver encoder: 0x020e)
# --     PNG:                         /usr/lib/arm-linux-gnueabihf/libpng.so (ver 1.6.28)
# --     TIFF:                        /usr/lib/arm-linux-gnueabihf/libtiff.so (ver 42 / 4.0.8)
# --     JPEG 2000:                   /usr/lib/arm-linux-gnueabihf/libjasper.so (ver 1.900.1)
# --     OpenEXR:                     build (ver 1.7.1)
# --     HDR:                         YES
# --     SUNRASTER:                   YES
# --     PXM:                         YES
# --     PFM:                         YES
# -- 
# --   Video I/O:
# --     DC1394:                      NO
# --     FFMPEG:                      YES
# --       avcodec:                   YES (57.64.101)
# --       avformat:                  YES (57.56.101)
# --       avutil:                    YES (55.34.101)
# --       swscale:                   YES (4.2.100)
# --       avresample:                YES (3.1.0)
# --     GStreamer:                   YES (1.10.4)
# --     v4l/v4l2:                    YES (linux/videodev2.h)
# -- 
# --   Parallel framework:            pthreads
# -- 
# --   Trace:                         YES (built-in)
# -- 
# --   Other third-party libraries:
# --     Lapack:                      YES (/usr/lib/liblapack.so /usr/lib/libcblas.so /usr/lib/libatlas.so)
# --     Eigen:                       YES (ver 3.3.2)
# --     Custom HAL:                  YES (carotene (ver 0.0.1))
# --     Protobuf:                    build (3.5.1)
# -- 
# --   OpenCL:                        YES (no extra features)
# --     Include path:                /opt/opencv-4.1.0/3rdparty/include/opencl/1.2
# --     Link libraries:              Dynamic load
# -- 
# --   Python 3:
# --     Interpreter:                 /usr/bin/python3 (ver 3.5.3)
# --     Libraries:                   /usr/lib/arm-linux-gnueabihf/libpython3.5m.so (ver 3.5.3)
# --     numpy:                       /usr/lib/python3/dist-packages/numpy/core/include (ver 1.12.1)
# --     install path:                lib/python3.5/dist-packages/cv2/python-3.5
# -- 
# --   Python (for build):            /usr/bin/python3
# -- 
# --   Install to:                    /usr/local
# -- -----------------------------------------------------------------
# -- 
# -- Configuring done
# -- Generating done
# -- Build files have been written to: /opt/opencv-4.1.0/build

# Docker will cache the above results, but the compilation below will need to be redone if
# anything goes wrong. A solution would be to stop here (by commenting everything below) and:
# $ docker run --name pre_make_<image_name> -it <image_name> bash
# and only then run the commands below. This way you could take advantage 
# of any compilation caches if things go wrong...
# After everything is working, update this dockerfile with the correct instructions...
# and commit your final image ;)
# Moreover, you could also benefit by installing ccache (not installed)
# RUN apt-get install -y --fix-missing ccache

RUN cd /opt/opencv-${OPENCV_VERSION}/build && \
  # make VERBOSE=1 && \
  # -j6 will work because I'm compiling on my laptop instead of the rpi zero ;)
  # on the rpi zero, you will have only one core so -j is useless...
  make -j6 && \
  make install

RUN cd /opt/opencv-${OPENCV_VERSION}/build && ldconfig

# RUN pip3 --no-cache-dir install dlib
# RUN pip3 --no-cache-dir install scikit-image
# RUN pip3 --no-cache-dir install scikit-learn

RUN apt-get install python3-picamera

RUN rm -rf /tmp/* /var/tmp/*
RUN rm -rf /opt/opencv-${OPENCV_VERSION}