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What is a good matrix manipulation library available for C?

I do a lot of image processing in C, and I need a good, fairly lightweight and, above all, library of FFT matrix processing with a permissive license. I mainly focus on affine transforms and matrix inversions, so I don't need anything complicated or bloated.

First of all, I would like something very fast (using SSE, maybe?), With a clean API and (hopefully) pre-packaged by many unix package management systems.

Note that this is for C not for C ++.

thanks

:)

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math matrix image graphics image-manipulation
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I found this library and it is brilliant: Meschach

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I would say BLAS or LAPACK.

Here you have some examples.

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You can try CUBLAS (CUDA Basic Linear Algebra Subroutines library) with a CUDA-enabled graphics card for processing matrices on nVidia GPUs. It has a rather significant performance boost than other CPU libraries, although it is not so lightweight to your requirements.

This page contains description and numbers.

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Armadillo have a simple interface and can use different LAPACK and BLAS linear algebra libraries

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