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.
J2K is a raster image category file format. It is a compressed bitmap using wave compression instead of DCT compression, which is used by standard .JPEG images. The format supports 16-bit color, alpha transparency and lossless compression. The file type is JPEG 2000 Image. The J2K file format was developed by the Joint Photographic Experts Group (JPEG). J2K is an update to the JPEG format that includes original features. Say alpha channel support and lossless compression. J2K is a segment of a large package of updated JPEG extensions. They gained fame as JPEG2000. Such as J2C, JPX, JPM or JP2. The lion's share of such formats are combined with the main programs so that you can view images. However, JPEG is particularly popular. For those who specialize in photography, it is important that they have the opportunity to reduce the file size, while saving it on disk with the same frame size and at the same high visual quality. How to get out of this situation? You can, for example, store images in JPEG2000 format with the file extension jp2 or j2k. The compression algorithm and the format itself have been known for over 10 years. Nevertheless, there is no need to talk about its widespread use. That's because his "big brother" JPEG is firmly holding on to its position.