libwebp

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Commit Graph

Author	SHA1	Message	Date
skal	00125196f3	gif2webp: detect and flatten uniformly similar blocks helps during lossless compression. 10% average saving, but that's mostly on what was previously 'difficult' cases, where the gain is ~30-50% actually. Non-difficult cases are mostly unchanged. Tested over ~7k random web gifs. Change-Id: I09db4560e4ab09105d1cad28e6dbf83842eda8e9	2013-10-08 15:04:52 +02:00
Urvang Joshi	606c4304c4	gif2webp: Improved compression for lossy animated WebP We reduce transparency by turning some transparent pixels into corresponding RGB values from previous canvas. This improves compression by about 23%. Change-Id: I02d70a43a1d0906ac09a7e2dc510be3b2d38f593	2013-09-30 16:48:39 -07:00
Urvang Joshi	d538cea8c2	gif2webp: Support a 'min' and 'max' key frame interval Change-Id: If910c8849d7210e7227db0f45affa26fce7da102	2013-09-12 13:41:09 -07:00

Author

SHA1

Message

Date

skal

00125196f3

gif2webp: detect and flatten uniformly similar blocks

helps during lossless compression.

10% average saving, but that's mostly on what was previously
'difficult' cases, where the gain is ~30-50% actually.
Non-difficult cases are mostly unchanged.
Tested over ~7k random web gifs.

Change-Id: I09db4560e4ab09105d1cad28e6dbf83842eda8e9

2013-10-08 15:04:52 +02:00

Urvang Joshi

606c4304c4

gif2webp: Improved compression for lossy animated WebP

We reduce transparency by turning some transparent pixels into
corresponding RGB values from previous canvas.

This improves compression by about 23%.

Change-Id: I02d70a43a1d0906ac09a7e2dc510be3b2d38f593

2013-09-30 16:48:39 -07:00

Urvang Joshi

d538cea8c2

gif2webp: Support a 'min' and 'max' key frame interval

Change-Id: If910c8849d7210e7227db0f45affa26fce7da102

2013-09-12 13:41:09 -07:00

3 Commits