In computing, JPEG (seen most often with the .jpg or.jpeg filename extension) is a commonly used method of lossy compressionfor digital images, particularly for those images produced by digital photography. The degree of compression can be adjusted, allowing a selectable tradeoff between storage size and image quality. JPEG typically achieves 10:1 compression with little perceptible loss in image quality. JPEG compression is used in a number of image file formats. JPEG/Exif is the most common image format used by digital cameras and other photographic image capture devices; along with JPEG/JFIF, it is the most common format for storing and transmitting photographic images on the World Wide Web.
Simple graphic format in color. Use 24 bits per pixel: 8 for red, 8 for green, 8 for blue if the maximum gray value is 255, uses 16 bits for red, 16 for green and 16 for blue if the value is greater than 255 and less than 65536. a PPM file is plain text and can be modified with a single processor, there is also not readable binary version of word processing normally. It is related to the PGM (grayscale) and PBM formats (black and white).