pnmindex
Build a visual index of multiple PNM images.
See also: pamundice.
More information: https://netpbm.sourceforge.net/doc/pnmindex.html.
- Produce an image containing thumbnails of the specified images in a grid:
pnmindex path/to/input1.pnm path/to/input2.pnm … > path/to/output.pnm
- Specify the size of the (quadratic) thumbnails:
pnmindex -size 50 path/to/input1.pnm path/to/input2.pnm … > path/to/output.pnm
- Specify the number of thumbnails per row:
pnmindex -across 10 path/to/input1.pnm path/to/input2.pnm … > path/to/output.pnm
- Specify the maximum number of colors in the output:
pnmindex -colors 512 path/to/input1.pnm path/to/input2.pnm … > path/to/output.pnm