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Luc Trudeau authored
Since Subsampled values are in Q3, one does not need to take the average, as the sum of 4 values is the average in Q2. As such, shifting by 1 to the left, results in the average in Q3. By removing the intermediate step in Q0, rounding error is removed. Results on Subset1 PSNR | PSNR Cb | PSNR Cr | PSNR HVS | SSIM | MS SSIM | CIEDE 2000 -0.0204 | -0.1945 | -0.1474 | -0.0170 | -0.0237 | -0.0178 | -0.0973 https://arewecompressedyet.com/?job=cfl-baseline%402017-09-06T17%3A41%3A38.041Z&job=cfl-NoAverageInSub%402017-09-06T17%3A59%3A00.035Z Change-Id: I8c6d4f71ec0e6e3923e254d79b83127b3734699e
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