Thanks! I fully agree. Most of the code probably can be ported to C(++) without much change, it's just a few loops over arrays, except for the image loading par

Thanks! I fully agree. Most of the code probably can be ported to C(++) without much change, it's just a few loops over arrays, except for the image loading part. Best solution might be to extend a similar existing unix tool. Can you recommend any (ideally with the source on github)?