- Extension
- .pgm
- .rgbo
- Format
- Binary
- Category
- Raster Image
- Other
- Developer
- Jef Poskanzer
- Adobe Systems
- 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.
- Format for representing colors in the three primary colors (red, green and blue), each of which has 255 gradations. In contrast to the standard RGB, it allows you to change the transparency of the entire image using the opacity parameter.
- MIME Type
- image/x-portable-graymap
- image/x-rgbo
