Linked by Thom Holwerda on Thu 30th Sep 2010 23:04 UTC
Google A few months ago, Google open sourced the VP8 video codec as part of the WebM video project, to create a truly Free/free unencumbered video format for the web as an answer to the non-Free/free patent-encumbered H264 format. Today, Google launched a new image format for the web, WebP, which aims to significantly reduce the file size of photos and images on the web.
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Yeah but why on earth did they use JPEGs as the input, and optimise for PSNR?

Also in their comparison gallery all the images are so loosely compressed that there are no differences at all. Totally useless.

Edit: Actually I checked by subtracting the images. They are exactly identical; they must have messed up somewhere.

Edit 2: Ahem, sorry they aren't exactly identical - the differences are nearly all less than 5 though, which is basically imperceptible. If you plot the difference image it looks pure black.

Edited 2010-10-01 13:24 UTC

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