ppm
What is a .ppm file?
image/x-portable-pixmap
PPM (Portable Pixmap) is a deliberately simple truecolor image format from the Netpbm family, storing RGB pixels as either ASCII text or raw binary after a small text header. It uses no compression, making files large but trivial to parse. It is common in academic, scientific, and toolchain contexts.
How to use a .ppm file
Use an example PPM to test minimal image parsers, verify raw RGB pipeline output, or serve as an easily hand-inspectable intermediate in conversion tools.