Image scaling and rotating in C/C++

Question

What is the best way to scale a 2D image array? For instance, suppose I have an image of 1024 x 2048 bytes, with each byte being a pixel. Each pixel is a grayscale level fro

Answer 1

Check out the Intel Performance Primitives. I have used it before and it produces near optimal performance on x86. There is also a test program that lets to play with the various algorithms.