- Extension
- .pgm
- .png48
- Format
- Binary
- Binary
- Category
- Raster Image
- Raster Image
- Developer
- Jef Poskanzer
- PNG Working Group
- Description
- A PGM file is a grayscale image file saved in the portable gray map (PGM) format and encoded with one or two bytes (8 or 16 bits) per pixel. It contains header information and a grid of numbers that represent different shades of gray from black (0) to white (up to 65,536). PGM files are typically stored in ASCII text format, but also have a binary representation.
- A PNG file is an image file stored in the Portable Network Graphic (PNG) format. It contains a bitmap of indexed colors and uses lossless compression, similar to a .GIF file but without copyright limitations. PNG files are commonly used to store graphics for web images.
- MIME Type
- image/x-portable-graymap
- image/png
