pamcut — Cut out a rectangular region from a Netpbm image. See also: `pamdice`, `pamcomp`. More information:

Discard the specified number of columns/rows on each side of the image

pamcut {{[-cropl|-cropleft]}} {{value}} {{[-cropr|-cropright]}} {{value}} {{[-cropt|-croptop]}} {{value}} {{[-cropb|-cropbottom]}} {{value}} {{path/to/image.ppm}} > {{path/to/output.ppm}}

Keep only the columns between the specified columns (inclusively)

pamcut {{[-l|-left]}} {{value}} {{[-ri|-right]}} {{value}} {{path/to/image.ppm}} > {{path/to/output.ppm}}

Fill missing areas with black pixels if the specified rectangle does not entirely lie within the input image

pamcut {{[-t|-top]}} {{value}} {{[-b|-bottom]}} {{value}} -pad {{path/to/image.ppm}} > {{path/to/output.ppm}}