Saturday, October 2, 2010

WebP vs JPEG vs JPEG 2000 vs JPEG XR

Image compression is on the news again and this time it is Google behind it trying to dethrone the lossy format JPEG. Google does not mention JPEG XR (aka Windows Media Photo and HD Photo and with file extension .WDP or .JXR) that is natively supported by Windows Vista, Windows 7 and Internet Explorer 9. JPEG XR still have not gained any real usage after several years. Could it be licensing issues behind it. Let’s wait a few years and see if Google can get JPEG replaced. In near future WebP will be supported by Google’s Chrome browser and all of this .

compression vs alt

WebP is a method of lossy compression that can be used on photographic images. The degree of compression is adjustable so a user can choose the trade-off between file size and image quality. WebP typically achieves an average of 39% more compression than JPEG and JPEG 2000, without loss of image quality. Alpha channel support is planned for.


I wish that a future Windows Live Writer had a choice to optimize the image when publishing so you could chose the best format for the purpose. Something like this already exists in Microsoft Expression Web.

Another wish is that Snagit could respect the image format setting when copying directly to clipboard or the preview editor. Now all is PNG.

Below is one JPEG XR image that should be possible to view in IE9.

Update. The first image below cannot be viewed in the first public IE9 beta for some reason even though it can be seen in Windows 7. It might have to do with some that it was saved with a quite old HD Photo plugin for Paint.NET.


So I added one that works for sure in IE9 beta.


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