Guetzli: Perceptually Guided JPEG Encoder — mentioned by TD-Linux

Thu, 16 Mar 2017 20:00:37 GMT

There is no block to block prediction other than DC prediction, so is this effect due to your distortion function spanning multiple blocks? Same for cross YUV channels, because your metric is in RGB space? edit: second read-through I found the paper [1] which explains it. The answer is basically "yes", where the large scale distortion function is basically activity masking. Normally this would be implemented with delta-QPs, but because JPEG doesn't have that, Guetzli uses runs of zeroes instead. [1] https://arxiv.org/pdf/1703.04421

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Guetzli: Perceptually Guided JPEG Encoder · HackerPapers discussions

Guetzli: Perceptually Guided JPEG Encoder — mentioned by TD-Linux