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| Name | PNM | JPG |
| Full name | Portable Any Map Image | JPG - Joint Photographic Experts Group |
| File extension | .pnm | .jpg, .jpeg, .jpe |
| MIME type | image/x‑portable‑bitmap, image/x‑portable‑graymap, image/x‑portable‑pixmap, image/x‑portable‑anymap | image/jpeg |
| Developed by | Jef Poskanzer | Joint Photographic Experts Group |
| Type of format | Image | lossy image format |
| Description | A bitmap image in the Portable Any Map format that was originally developed for processing and storing several types of monochrome and color images without compression as well as grayscale images. Bitmap graphics data in a PNM file are stored using ASCII or binary structure. | JPG is a commonly used method of lossy compression for 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. JPG typically achieves 10:1 compression with little perceptible loss in image quality. |
| Technical details | Image files that employ JPG compression are commonly called "JPG files", and are stored in variants of the JIF image format. Most image capture devices (such as digital cameras) that output JPG are actually creating files in the Exif format, the format that the camera industry has standardized on for metadata interchange. | |
| Associated programs | GIMP, ImageMagick, Newera Graphics Converter Pro, The MathWorks MATLAB, Wolfram Research Mathematica, XnView | Apple Safari, Google Chrome, Mozilla Firefox, Internet Explorer, Adobe Photoshop, Paint Shop Pro, the GIMP, ImageMagick, IrfanView, Pixel image editor, Paint.NET, Xara Photo & Graphic Designer. |
| Wiki | https://en.wikipedia.org/wiki/Netpbm_format | https://en.wikipedia.org/wiki/JPEG |