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

It sounds like what you're really having difficulty understanding is the discrete -> continuous -> discrete flow involved in properly resampling an image. A good tech report that might help give you the insight into this that you need is Alvy Ray Smith's A Pixel Is Not A Little Square.