3. Performance
Methods for evaluating the quality of a compressed digital image include:
-
objective methods, such as measurements :
the Peak Signal-to-Noise Ratio (PSNR), averaged over the entire image, but with no spatial correlation and therefore not an accurate reflection of the visual quality perceived (objectively) by the human visual system,
the root-mean-square error, MSE (Mean Squared Error ), or RSME (Root-Mean-Square Error ), translating the power of error between the source image and the decompressed image, also not always well related to visual quality,
Weighted MSE using psycho-visual masks,
the structural similarity index, or SSIM (Structural SIMilarity index ), which takes into account similarities between...
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Performance
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