Open-source PSNR/ SSIM C implementation without OpenCV? [closed]

Question

Is there any open source C implementation for PSNR, SSIM or MSE that doesn't rely on OpenCV?

Thanks.

Answer 1

IQA provides a C implementation with no dependencies of the following image quality metrics:

• MSE
• PSNR
• SSIM
• MS-SSIM
• MS-SSIM*

Answer 2

Google's WebM project provides these calculations in the libvpx library. Specifically in the VP8 encoder.

Then there is also NetPBM, FFMPEG and the x264 Project.