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Install the OpenCV Developer package. On Ubuntu systems that's
sudo apt install libopencv-dev -
go get github.com/zikes/chrisify -
go get github.com/lazywei/go-opencv -
cd $GOPATH/github.com/zikes/chrisify && go build && go install
Simplest: ./chrisify path/to/image.jpg > output.jpg
If executed from any location besides the repository, you must tell it where to find the bundled Haar Cascade face recognition XML file. I tried to bundle it with the binary, but it must be provided as a file to the OpenCV library, so a file path is necessary.
chrisify --haar /path/to/haarcascade_frontalface_alt.xml /path/to/input.jpg > output.jpg
If you'd like to include additional face options, you can provide a directory of PNG files to be imported:
chrisify --faces /path/to/faces /path/to/input.jpg > output.jpg
Chris is a great guy, but I can understand if you'd rather use some different faces. The most effective way to do this is to remove the FaceList.loadInternal() function (and reference) and delete bindata.go. Then make sure you run the executable with the --faces argument to load only the faces you want to use. Unless I'm forgetting anything, that's all there is to it!