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.
ARW is an uncompressed file format with a digital image of a sufficiently large size, which Sony has created and successfully uses for raw images of its own digital cameras (Sony Digital Camera Raw Image). That is, files of this format are RAW. To open them, you need to use special graphics programs. Any ARW file has a set of basic information. 1) Information from the manufacturer. This includes information about the camera model, filters, lens, sensitivity, color space, white balance, etc. 2) EXIF information. Details of aperture, exposure time, flash, and more. 3) Thumbnail image. Usually about 12 MPx, color, compression. 4) Full-size image with a large color depth. Typically, 12 bits per pixel, or 4096 brightness levels. A full-sized image can be saved as information about different colors. Red, blue, green. The image is collected, and the result is a color photo. Due to this and due to the large color depth of RAW, this type of file is perfect for processing graphics. Better than jpg. The format provides the ability to save many details. It has more options for adjusting color, restoring details from shadows and reducing noise.