pamcut

extracts a rectangular region from a PAM or PNM image

TLDR

Cut region from image

$ pamcut [x] [y] [width] [height] [input.pam] > [output.pam]

Cut from coordinates

$ pamcut -left [100] -top [50] -width [200] -height [150] [input.pam] > [output.pam]

Cut right portion

$ pamcut -right [100] -bottom [100] -width [200] -height [200] [input.pam] > [output.pam]

Pad if outside bounds

$ pamcut -pad -left [-10] -top [-10] -width [300] -height [300] [input.pam] > [output.pam]

SYNOPSIS

pamcut [options] [x y width height] [pamfile]

DESCRIPTION

pamcut extracts a rectangular region from a PAM or PNM image. Coordinates can be specified from any corner using combinations of left/right and top/bottom.

PARAMETERS

-left x

Left edge position.

-right x

Right edge position.

-top y

Top edge position.

-bottom y

Bottom edge position.

-width w

Output width.

-height h

Output height.

-pad

Pad with black if outside.

EXAMPLE

$ # Cut 100x100 from top-left corner
pamcut 0 0 100 100 photo.ppm > crop.ppm

# Cut center region
pamcut -left 100 -top 100 -width 200 -height 200 input.ppm > center.ppm

CAVEATS

Coordinates are 0-indexed. Without -pad, region must be within image bounds.

HISTORY

pamcut is part of Netpbm, evolving from the original PBMplus toolkit created by Jef Poskanzer.