JP2 is a bitmap image format. The JP2 format, i.e. JPEG 2000 image, was developed by the Joint Photographic Experts Group. The JP2 file can be in the form of a photograph, drawing, digital fax, etc. File type: JPEG 2000 Core Image File. JPEG 2000 is the patent-pending bitmap image format. It has been licensed free of charge, and now it is an international standard (ISO / IEC 15444-1: 2004). Compared to the previous JPEG-1 standard, JPEG 2000 uses a completely different method to compress data (wavelet transform, wavelet transform). This method generally ensures higher image quality. It also gives a more compact file size. The JP2 format has a lot in common with the JPEG format, which is now especially popular. However, it differs in that it uses wavelet transform technology for compression, and discrete cosine transform has found application in JPEG. Using the first technology, you can get a better image, even when the file size is relatively smaller. There are also JP2 files with the extensions .J2K, JPF, MJ2, JPX and JPM. In order to open a file of this format, that is, to edit, use programs such as Mozilla Firefox, Adobe Photoshop, ACD Systems ACDSee, Google Chrome.
JNG is a raster format. It has a close relationship with PNG. The JNG format uses exactly the same structure as PNG. It stores data in the main JPEG stream, is able to store the alpha channel stream in the form of PNG or JPEG, as well as information in the form of text. It also supports gamma and color correction. This image file format uses lossless compression similar to standard .JPEG files. The format was developed as a sub-format for .MNG objects. However, it is quite suitable as a separate raster image format. Some JNG files include an optional alpha channel for transparency. It does not support standard JPEG files. It is also possible to include auxiliary data sections, which may contain information about color space and comments. JNG is a format that is not very popular. Nevertheless, it has such a very good property as a large degree of lossy graphics compression. He also has an alpha channel. Color data is stored in JPEG format. For alpha, there is one of two storage options. It can be compressed using JPEG, like a grayscale picture. Or you can use the same as in PNG, lossless compression. The format is best suited to store texture atlases in mobile games. A good win for a mobile game.