pnmcrop

Crop borders from image

$ pnmcrop [input.pnm] > [output.pnm]

$ pnmcrop -white [input.pnm] > [output.pnm]

$ pnmcrop -black [input.pnm] > [output.pnm]

$ pnmcrop -left -right [input.pnm] > [output.pnm]

pnmcrop [options] [file]

pnmcrop automatically detects and removes uniform-color borders from PNM images. It identifies rows and columns at the edges that consist entirely of the border color and trims them.
By default it detects the border color automatically, but -white and -black force specific border colors. Individual sides can be cropped selectively with -left, -right, -top, and -bottom flags. Part of the Netpbm toolkit.

FILE

Input PNM file.

Crop white borders.

Crop black borders.

Crop left side only.

Crop right side only.

Crop top only.

Crop bottom only.

Show cropping information.

Border color must be uniform. Part of Netpbm suite.

pnmcrop was created as part of Netpbm for automatic image border removal.

pnmcut(1), pnmpad(1), pamcut(1)