C++ / Java / C# Image processing library

What would be the best library choice for finding similar parts in images and similar开发者_如何学运维ity matching?

Thank you.

It sounds like the Scale Invariant Feature Transform (SIFT) is probably the algorithm you're really looking for. Offhand, I don't know of any general-purpose image processing library that includes it, but there are definitely standalone implementations to be found (and knowing the name should make Googling for it relatively easy).

ImageJ fastest image processing library in Java.

OpenCV is certainly a solid choice as always.

That said, VLFeat is also very good. It includes many popular feature detectors (including SIFT, MSER, Harris, etc.) as well as clustering algorithms like (kd-trees and quickshift). You can piece together something like a bag of words classifier using that very quickly.

While SIFT is certainly a solid general purpose solution, it actually is a pipeline composed of a feature detector (which points are interesting in the image), a feature descriptor (for each interesting point in the image, what's a good representation), and a feature matcher (given a descriptor and a database of descriptors, how do I determine what is the best match).

Depending upon your application, you may want to break apart this pipeline and swap in different components. VLFeat's SIFT implementation is very modular and lets you experiment with doing so easily.

Never did image processing, but I've heard from friends OpenCV is quite good, they usually use C++