pnmtorle
Convert a PNM file to an Utah Raster Tools RLE image file. tldr-pages
On several platforms
Several platforms
Convert a PNM image to an RLE image
pnmtorle path/to/input.pnm >path/to/output.rleIdentifyPrint PNM header information to stdout
pnmtorle -verbose path/to/input.pnm >path/to/output.rleIdentifyInclude a transparency channel in the output image in which every black pixel is set to fully transparent and every other pixel is set to fully opaque
pnmtorle -alpha path/to/input.pnm >path/to/output.rleIdentify