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98c8138663
Enable the WebP near-lossless feature by pre-processing the image to smoothen the pixels. On a 1000 PNG image corpus, for which WebP lossless (default settings) gets 25% compression gains, following is the performance of near-lossless feature at various '-near_lossless' levels: -near_lossless 90: 30% (very very high PSNR 54-60dB) -near_lossless 75: 38% (very high PSNR 48-54dB) -near_lossless 50: 45% (high PSNR 42-48dB) -near_lossless 25: 48% (moderate PSNR 36-42dB) -near_lossless 10: 50% (PSNR 30-36dB) WebP near-lossless is specifically useful for discrete-tone images like line-art, icons etc. Change-Id: I7d12a2c9362ccd076d09710ea05c85fa64664c38 |
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| .. | ||
| Android.mk | ||
| cwebp.c | ||
| dwebp.c | ||
| example_util.c | ||
| example_util.h | ||
| gif2webp.c | ||
| gifdec.c | ||
| gifdec.h | ||
| 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 | ||
| webpdec.c | ||
| webpdec.h | ||
| webpmux.c | ||
| wicdec.c | ||
| wicdec.h | ||
