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Even at high quality setting, the U/V quantizer step is limited to 4 which can lead to banding on gradient. This option allows to selectively apply some randomness to potentially flattened-out U/V blocks and attenuate the banding. This option is off by default in 'dwebp', but set to -dither 50 by default in 'vwebp'. Note: depending on the number of blocks selectively dithered, we can have up to a 10% slow-down in decoding speed it seems. Change-Id: Icc2446007f33ddacb60b3a80a9e63f2d5ad162de |
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|---|---|---|
| .. | ||
| cwebp.c | ||
| dwebp.c | ||
| example_util.c | ||
| example_util.h | ||
| gif2webp_util.c | ||
| gif2webp_util.h | ||
| gif2webp.c | ||
| jpegdec.c | ||
| jpegdec.h | ||
| Makefile.am | ||
| metadata.c | ||
| metadata.h | ||
| pngdec.c | ||
| pngdec.h | ||
| stopwatch.h | ||
| test_ref.ppm | ||
| test.webp | ||
| tiffdec.c | ||
| tiffdec.h | ||
| vwebp.c | ||
| webpmux.c | ||
| wicdec.c | ||
| wicdec.h | ||
