New, enhanced JPEG format
Moderators: XnTriq, helmut, xnview
New, enhanced JPEG format
They're introducing a new JPEG format in response to M$'s HDphoto format. This new JPEG format is actually a revisit to an old format, arithmetic coding. They removed/replaced the patented portions that shut down arithmetic JPEGs before with non-patented ones. There's an alpha stage, open source implementation available HERE (but only in source code form, no binaries). More info on the format HERE. This format looks promising, and promises to be fairly easy to implement on wide scale, since it's just a modification of an existing format (and claims to be backwards compatible) instead of an entirely new format. It'd be great if Xnview were the first prog to have support for the new format.
Of course !
—> Drahken
Hello !
KR
Claude
Clo
Hello !
• Of course ! I support that wish +++!…It'd be great if Xnview were the first prog to have support for the new format.
KR
Claude
Clo
Old user ON SELECTIVE STRIKE till further notice •
- foxyshadis
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- Joined: Sat Nov 18, 2006 8:57 am
Not backwards compatible, which would be quite a feat. ;_; It is a lossless reversable transform, however, in the same way that lossless rotation or cropping works. In other words, when the support shows up, it'd be possible to losslessly re-compress your entire jpeg library to this, and batch change a number back to normal jpegs if you need them for some reason, without any quality loss.
A ~10% gain isn't incredible, but it's nothing to sniff at if it comes for free. I just wonder how it compares to progressive output. Unfortunately, I can't build IJG or ImageMagick without crashes, or I'd post a build.
(This would be a fantastic addition to the versatile jpegtran tool, as well.)
A ~10% gain isn't incredible, but it's nothing to sniff at if it comes for free. I just wonder how it compares to progressive output. Unfortunately, I can't build IJG or ImageMagick without crashes, or I'd post a build.
(This would be a fantastic addition to the versatile jpegtran tool, as well.)
Re: New, enhanced JPEG format
Ok, thanks i'll check...Drahken wrote:They're introducing a new JPEG format in response to M$'s HDphoto format. This new JPEG format is actually a revisit to an old format, arithmetic coding. They removed/replaced the patented portions that shut down arithmetic JPEGs before with non-patented ones. There's an alpha stage, open source implementation available HERE (but only in source code form, no binaries). More info on the format HERE. This format looks promising, and promises to be fairly easy to implement on wide scale, since it's just a modification of an existing format (and claims to be backwards compatible) instead of an entirely new format. It'd be great if Xnview were the first prog to have support for the new format.
Pierre.
Re: New, enhanced JPEG format
Thank you for this brand-new info. I'd also like to see this format added to XnView very soon.Drahken wrote:... It'd be great if Xnview were the first prog to have support for the new format.
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More: http://www.news.com/8301-13580_3-9810024-39.htmlThe Joint Photographic Experts Group decided earlier this week to officially endorse the Microsoft HD Photo file format as the eventual heir apparent to the JPEG standard. In order to be adopted, the format has lost its vendor-specific name and other Microsoft proprietary controls to ensure universal compatibility. The new format will hence be known as JPEG XR whereby XR stands for eXtended Range.