JPEG XR has become the ISO / IEC standard
Today announced that the JPEG XR format ( wiki ) developed by Microsoft for the replacement of JPEG, has become the international standard ISO / IEC 29199-2. Previously, he was called HD Photo. On Habré already written about him. As reported in the Microsoft blog entry , the new format has the following main advantages:
* Better compression - JPEG XR offers greater compression efficiency than JPEG, and compression artifacts are not as noticeable as typical JPEG artifacts. JPEG XR offers a wide range of compression levels, including compression with no visible loss or full lossless compression;
* More image formats - JPEG XR supports both 8bpc (bits per channel), 16bpc and 32bpc as well as other special formats. The pixel color value can be stored as an integer and floating-point number of different accuracy (scaled fixed point numbers or full floating point). This allows for both HDR support and images with an extended color range (wide gamut color spaces). In addition to RGB, JPEG XR supports monochrome, CMYK and n-channel formats, up to 16 independent channels. Most of these formats support the alpha channel. Broad support for many formats can significantly improve the quality of images and replace one new format with several previous formats designed for different scenarios;
')
* Advanced decoding functions - JPEG XR offers progressive decoding, which allows you to create both a preview of a low-resolution full image and some part of it without fully decoding the entire image. In addition, JPEG XR images can be cut, rotated, flipped, or resized without the need for decoding and re-encoding the original image. This means that the described operations will be carried out significantly, significantly faster and without loss of quality, as it could have been before with repeated decoding / encoding.
Currently, there is wide support for the HD Photo format for many popular programs in the form of plug-ins and extensions. Details are listed in the wiki article . Format support, according to the ISO standard, is also not long in coming.
* Better compression - JPEG XR offers greater compression efficiency than JPEG, and compression artifacts are not as noticeable as typical JPEG artifacts. JPEG XR offers a wide range of compression levels, including compression with no visible loss or full lossless compression;
* More image formats - JPEG XR supports both 8bpc (bits per channel), 16bpc and 32bpc as well as other special formats. The pixel color value can be stored as an integer and floating-point number of different accuracy (scaled fixed point numbers or full floating point). This allows for both HDR support and images with an extended color range (wide gamut color spaces). In addition to RGB, JPEG XR supports monochrome, CMYK and n-channel formats, up to 16 independent channels. Most of these formats support the alpha channel. Broad support for many formats can significantly improve the quality of images and replace one new format with several previous formats designed for different scenarios;
')
* Advanced decoding functions - JPEG XR offers progressive decoding, which allows you to create both a preview of a low-resolution full image and some part of it without fully decoding the entire image. In addition, JPEG XR images can be cut, rotated, flipped, or resized without the need for decoding and re-encoding the original image. This means that the described operations will be carried out significantly, significantly faster and without loss of quality, as it could have been before with repeated decoding / encoding.
Currently, there is wide support for the HD Photo format for many popular programs in the form of plug-ins and extensions. Details are listed in the wiki article . Format support, according to the ISO standard, is also not long in coming.
Source: https://habr.com/ru/post/65796/
All Articles