The PNM (Portable Any Map) format is a family of image file formats used for portable images, which are maps of pixel values that can represent grayscale or color data. The PNM format family includes three types of file formats: PBM (Portable BitMap), PGM (Portable GrayMap), and PPM (Portable PixMap).

.jpg (Joint Photographic Experts Group) The .jpg or JPEG format is a widely used method of lossy compression for digital images, especially for those images produced by digital photographyThe compression level can be adjusted, allowing a selectable balance between storage size and image quality. JPEG is commonly used for storing and transmitting photographs on the World Wide Web, and it's also a standard format used by digital cameras and other photographic image capture devices.