Tuesday, October 12, 2010

Goodbye JPEG - hello WEBP?

Sorry, this post has moved.

Click

HERE

to view it.
Posted by
Labels: , ,
Your reaction: 

5 comments:

  1. "Higher level of compression, smaller file size, and much higher image quality" is saying the same thing in three ways, like saying "the athlete runs quicker, faster and at a higher rate of speed than his opponent". These are all the same metric: a higher quality-to-compression ratio.

    ReplyDelete

  2. Hello Anonymous,

    Thanks for your comment.
    I suppose you could argue that level of compression and file size are linked, but image quality is not linked. I.e. At a higher level of compression and thus smaller file size the level of quality is higher with the WebP.

    I will edit the post to make this clearer.

    ReplyDelete

  3. Given the dramatic growth of HD consumer video, it doesn't surprise me that Google is looking for ways to reduce bandwidth demand with a compression technology that has relevance in the video industry. I'm sure a big barrier to Google's ability to making Youtube more profitable is the cost of bandwidth and server horsepower. Sure would be nice if video and static image delivery could use the same compression model - whether that's LAB or YUV, no? One industry might be more nimble than the other, and that may dictate which model is chosen.

    ReplyDelete

  4. i agree with anonymous, and the author's reply misses the "higher quality" point ... if the compression level is higher, then an image compressed to the same size as a JPEG would have higher quality than the JPEG; all three factors are linked

    however, after consulting several references (curiously none provided by the author) it seems that WEBP may not really deliver better quality at a given level of compression (it seems to depend how you measure quality), and there are some significant technical limitations to the format

    ReplyDelete

  5. There are JPEG encoders out there where you can set the compression of Cr and Cb channles seperated to the Y channel.

    An example is the SAI paint tool JPEG exporter.

    ReplyDelete

Subscribe to: Post Comments (Atom)