- Extension
- .pgm
- .snb
- Format
- Binary
- Binary
- Category
- Raster Image
- Ebook
- Developer
- Jef Poskanzer
- Shanda
- 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.
- Is a format developed for the Shanda Bambook e-books, and is exclusive to those devices. Certain e-books produced by other companies can also view documents of this type. Shanda released its latest device in 2011 which is why this format is not widely used at present.
- MIME Type
- image/x-portable-graymap
- application/x-snb-shandabook
