ppc_image_analysis, a C code which analyzes and manipulates an image stored in PGM or PBM format, from Rouben Rostamian's "Programming Projects in C";
The information on this web page is distributed under the MIT license.
ppc_image_analysis is available in a C version.
ppc_xmalloc, a library which manages the allocation of memory, from Rouben Rostamian's "Programming Projects in C";