@David_Tschumperle, Thank You!
Does the algorithm works in INT8 / INT16 or all values are transformed into [0, 1] 32 BIT FP?
What is "Fast Approximation"?
What is "Patch Smoothness"?
@patdavid, Could the MathJax rendering of math be enabled for the MarkDown editor?
I think I will be able to describe the algorithm.