JPEG v9.1 now supports 12-bit color and lossless compression

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JPEG v9.1 now supports 12-bit color and lossless compression

Post by Pobeditel »


While JPEG has become the most commonly used image file format for everything from digital cameras to smartphones and the Web, the compressed format doesn’t offer the greatest flexibility for users who want to edit the image afterward. It’s why many photographers prefer shooting in RAW and designers like TIFF because they aren’t as heavily compressed, which don’t suffer from compression artifacts as much as JPEG does when the image is scaled up; however, RAW and TIFF files tend to be much larger in size than JPEG. But if JPEG continues to be de facto in the future, artifacts like noise, fuzziness, and blockiness may not matter as updates to the standard offer more flexible compression options, including completely lossless (uncompressed). In other words, better image quality.

jpeg-9-codec-graphicThe Independent JPEG Group at Leipzig Institute for Applied Informatics, which defines the JPEG standard, just put out a new version (JPEG 9.1) of the software library. It supports 12-bit color depth, scaling functions, HDR support, and the aforementioned compression options.”New additions include functions for improved compression (arithmetic coding), multi-functional new scaling functions (‘Smart Scale’), as well as options to fully lossless compression. For future versions, among other enhancements are planned that support applications in the areas of ‘High Dynamic Range’ (HDR) imaging, and ‘Augmented Reality,’” the group wrote in a press release. The enhancements could also benefit printing or output on displays or projectors with a wide color gamut, according to the group.

With the ability to save images as lossless JPEG files that are still smaller in size, we could possibly do away with RAW and TIFF formats. JPEG as a standard is more universal than RAW (as every camera manufacturer has its own proprietary version of it and third-party software like Adobe Photoshop constantly have to get updated to support new cameras), so supporting one standard may be far easier. However, before any of this can happen, hardware and software makers have to adopt the new JPEG standard first. ... ss-option/


Can one expect support for this format ?
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Re: JPEG v9.1 now supports 12-bit color and lossless compres

Post by eL_PuSHeR »

I don't think it will become mainstream. JPEG2000 also has got lossless compression and it's seldom used.
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Re: JPEG v9.1 now supports 12-bit color and lossless compres

Post by omniplex »

Hi, after a quick test I fear that XnView 2.20 doesn't grok the output of jpegtran -arithmetic. Check out the odd README in
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