Some additional repos to consider:
imagecomp — Golang Image Compression Tool
netpress — Neural Network Based Image Compression
unixpickle/imagecompress — Trying out homemade image compression algorithms
Image-Comp — Image Compression/Analysis all done in Golang
ivancduran/imgserver — Simple image server for crop, resize, convert, optimize, facedetection with lossy and lossless compression writed in Golang
Once a week...... I send out a list of most interesting Go libraries and apps.
Want to get it?