I searched around the internet for a ready implementation/library for estimating 2 images by PSNR and SSIM, but found no real implementations for either. Are there really none or am I maybe missing some well known/obvious implementation? I really can't afford spending the time making my own implementations. If anyone knows of any or has made any (preferrably with color support, not just b&w), let me know, ok (preferrably python, since it's convenient and accessible)?
edit: why was my question downvoted?