JPM is a JPEG2000 bitmap category file format. The JPEG 2000 Part 6 standard defines that the .jpm extension refers to the JPEG 2000 Composite Image File Format. The JPEG2000 graphic format is a new standard that appeared in 2000 as an update to the JPEG format. He uses a type of technology called wavelet compression, which provides the best ratio of size and quality. The JPM format (i.e., the JPEG 2000 Multi-layer Image Format, ISO 15444-6) was developed for documents that have multiple pages and can be processed as a multi-page photo converter. The purpose of the JPEG 2000 Part 6 composite image format is to work primarily with documents and facsimile images. Compared to regular JPEG 2000 images, a .jpm file is a composite image with many layers. This file can have many pages. Moreover, each such page can have several raster objects. Moreover, in different encodings (JPEG, JPEG 2000, JBIG). They are located in a certain way and make up a single whole. JPM files are used as “digital originals” that store scanned copies of documents and other images and / or texts.
JXR is a raster image category file format whose full name is JPEG XR Image. JXR files were created so that you can support better compression and also become more accurate than .JPG files. The development of the image, which is stored in JPEG XR format, has been handled by Microsoft from the very beginning for its Windows Media program. Implements support for images with a color depth of 48 bits of RGB. Used when professional high-resolution image editing is required. Also provides lossy and lossless compression support. JPEG XR, formerly called HD Photo and Windows Media Photo, is an encoding standard. This is the file format for still images. It was patented by Microsoft. This standard supports Windows Vista, like any operating system on which the .NET Framework 3.0 is installed. It defines color formats for printing and displaying. It also defines special encoding in order to expand the dynamic range, lossless and lossy compression functions, as well as efficient decoding for many resolutions with minimal computer resources in order to convert or decode. JPEG XR is inherently high performance. For example, with 85% quality, there are practically no artifacts.