Dockerfile

# BSD 3-Clause License
#
# Copyright (c) 2017, Juliano Petronetto
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice, this
#   list of conditions and the following disclaimer.
#
# * Redistributions in binary form must reproduce the above copyright notice,
#   this list of conditions and the following disclaimer in the documentation
#   and/or other materials provided with the distribution.
#
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#   contributors may be used to endorse or promote products derived from
#   this software without specific prior written permission.
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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FROM alpine:3.6

ENV TESSDATA https://raw.githubusercontent.com/tesseract-ocr/tessdata/master/eng.traineddata
ENV OPENCV https://github.com/opencv/opencv/archive/3.3.0.tar.gz
ENV OPENCV_VER 3.3.0
ENV CC /usr/bin/clang
ENV CXX /usr/bin/clang++

RUN apk add -U --no-cache --virtual=build-dependencies \
    linux-headers musl libxml2-dev libxslt-dev libffi-dev g++ \
    musl-dev libgcc openssl-dev jpeg-dev zlib-dev freetype-dev build-base \
    lcms2-dev openjpeg-dev python3-dev make cmake clang clang-dev ninja \

    && apk add --no-cache gcc tesseract-ocr zlib jpeg libjpeg freetype openjpeg curl python3 \
    && curl https://bootstrap.pypa.io/get-pip.py | python3 \
    && ln -s /usr/bin/python3 /usr/bin/python \
    && ln -s /usr/bin/pip3 /usr/bin/pip \
    && curl $TESSDATA -o /usr/share/tessdata/eng.traineddata \
    && ln -s /usr/include/locale.h /usr/include/xlocale.h \
    && pip install -U --no-cache-dir Pillow pytesseract numpy

RUN mkdir /opt && cd /opt && \
    curl -L $OPENCV | tar zx && \
    cd opencv-$OPENCV_VER && \
    mkdir build && cd build && \
    cmake -G Ninja \
          -D CMAKE_BUILD_TYPE=RELEASE \
          -D CMAKE_INSTALL_PREFIX=/usr/local \
          -D WITH_FFMPEG=NO \
          -D WITH_IPP=NO \
          -D PYTHON_EXECUTABLE=/usr/bin/python \
          -D WITH_OPENEXR=NO .. && \
    ninja && ninja install && \
    ln -s /usr/local/lib/python3.6/site-packages/cv2.cpython-36m-x86_64-linux-gnu.so \
          /usr/lib/python3.6/site-packages/cv2.so && \
    apk del build-dependencies && \
    rm -rf /var/cache/apk/*