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Article | REF: TE5322 V1

JPEG 2000 – A wavelet-based digital picture compression format Standards. Performances. Applications

Authors: Jean-Noël GOUYET, Marc LEGER, Christophe NELSON

Publication date: February 10, 2016

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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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