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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Member since:

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

Reply Parent Score: 2

sakeniwefu Member since:

This guy does a better job. He fucked the JPEGs up at first, but if he has got it right this time then it would match Google's graph and WebP would indeed look better for similarly sized files.

Reply Parent Score: 2

Neolander Member since:

Indeed, looks like it's the same thing as with independent H.264 vs VP8 comparisons : JPG has a hideous blocky rendering but keeps more details, while WebP makes more nice-looking images at the cost of some blurring.

I prefer blur myself. In my opinion, being aesthetically-pleasing as a whole is much more important for a picture that some detail in the wild disappearing. Moreover, JPEG/H264 blocks are very annoying when doing image editing (they make tools based on contour detection fail miserably). And after all, those who really want details will only be satisfied with lossless formats anyway ;)

Edited 2010-10-02 08:09 UTC

Reply Parent Score: 3