How do I do high quality scaling of a image?

Question

I\'m writing some code to scale a 32 bit RGBA image in C/C++. I have written a few attempts that have been somewhat successful, but they\'re slow and most importantly the qualit

Answer 1

Intel has IPP libraries which provide high speed interpolation algorithms optimized for Intel family processors. It is very good but it is not free though. Take a look at the following link:

Intel IPP