With Filestar you get 12 different skills for working productively with Portable Image (.rpnm) files.
About .Rpnm
Name
Portable Image
Extension
.rpnm
Format
Binary
Category
Raster Image
Developer
Netpbm
Description
The RPNM file format, standing for "Portable Image," is a variant of the PNM file format used for storing images. It is designed to be a simple, yet flexible format that can accommodate various types of image data, including grayscale, black and white, and color. RPNM files can be easily transferred between different platforms and software applications due to their simplicity and portability. They are often used in applications and situations where minimal processing and compatibility across different systems are crucial.