pgmramp
Generate a greyscale map. tldr-pages
On several platforms
Several platforms
Generate a left-to-right greyscale map
pgmramp -lr >path/to/output.pgmIdentifyGenerate a top-to-bottom greyscale map
pgmramp -tb >path/to/output.pgmIdentifyGenerate a rectangular greyscale map
pgmramp -rectangle >path/to/output.pgmIdentifyGenerate an elliptical greyscale map
pgmramp -ellipse path/to/image.pgm >path/to/output.pgmIdentifyGenerate a greyscale map from the top-left corner to the bottom-right corner
pgmramp -diagonal path/to/image.pgm >path/to/output.pgmIdentify