Template match with gray model(ncc)

highlights:

1. original code based Fastest_Image_Pattern_Matching, you can checkout tag v1.0 for more details.
2. refactor simd match process with opencv Universal intrinsics, have be tested on x86_64(sse),arm(neon),LoongArch(lsx).
3. support model save/load as binary file
4. provide pure c interface
5. support openmp

usage:

all you need can be found in main.cpp

gallery: