With Filestar you get 12 different skills for working productively with Portable Greyscale (.rpgm) files.
About .Rpgm
Name
Portable Greyscale
Extension
.rpgm
Format
Binary
Category
Raster Image
Developer
Jef Poskanzer
Description
The RPGM file format, short for Portable Greyscale Map, is a type of image file that specifically stores greyscale graphics or images. It is designed to represent images in various shades of gray, ranging from black to white, without any color information. This file format is typically used in applications or environments where color is not necessary or desired, such as certain types of scientific imaging, document scanning, or specific graphic design projects. RPGM files are part of the Netpbm format collection, which also includes formats for black-and-white and color images.