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Notebook","readme":"# Use JavaCV on a raspberry pi\n\nOriginal goal was to check the difference of speed between standard compiled OpenCV (so origami) and JavaCV.\nI also originally thought JavaCV was compiling OpenCV with Gpu bindings, **it is not**.\n\n\n# more relevant javacv samples\n\nhttp://bytedeco.org/news/2015/04/04/javacv-frame-converters/\nhttps://github.com/bytedeco/javacv/blob/master/samples/ImageSegmentation.java\n\n# Installation.\n\n# extra libraries missing on modern raspbian ...\n\nThings that were missing on the raspberry pi\n\n```\napt install libgfortran3\n```\n\n# Jupyter notebook integgration for both clojure and java\n\n```\npip install jupyter\n```\n\n## extra clojure jupyter setup\n\n```\n## install leiningen\n## https://leiningen.org/#install\n\nlein jupyter install-kernel\n```\n\n##  extra java jupyter setup\n\n```\n# download: https://github.com/SpencerPark/IJava/releases\nwget https://github.com/SpencerPark/IJava/releases/download/v1.3.0/ijava-1.3.0.zip\nunzip  ijava-1.3.0.zip\n# with pyenv change the prefix for the kernel\npython3 install.py --prefix=/home/pi/.local\n\n# make sure you are using java 8 for java (broken with later sdks ..)\nsudo update-alternatives --set java /usr/lib/jvm/java-8-openjdk-armhf/bin/java\n\n# Although this seems to work ?\nsudo update-alternatives --set java /usr/lib/jvm/java-11-openjdk-armhf/bin/java\n```\n\n\nnow check the java and clojure kernels are installed:\n\n```\npi@raspberrypi:~/Downloads $ jupyter kernelspec list \nAvailable kernels:\n  java            /home/pi/.local/share/jupyter/kernels/java\n  lein-clojure    /home/pi/.local/share/jupyter/kernels/lein-clojure\n  python3         /home/pi/.local/share/jupyter/kernels/python3\n```\n\n```\n# start the notebook on a given ip\nexport LEIN_WORKING_DIRECTORY=$PWD\njupyter notebook 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