pnmpad

Add padding to image

$ pnmpad -left [10] -right [10] [input.pnm] > [output.pnm]

$ pnmpad -width [100] -height [100] [input.pnm] > [output.pnm]

$ pnmpad -color [white] -left [5] [input.pnm] > [output.pnm]

pnmpad [options] [file]

pnmpad adds padding (blank space) around PNM images, extending the canvas size without scaling the original content. Padding can be added independently to each side using -left, -right, -top, and -bottom.
Alternatively, -width and -height specify the desired output dimensions, centering the original image within the new canvas. The -color option sets the padding color (default is black). This is the inverse of pnmcrop. Part of the Netpbm toolkit.

FILE

Input PNM file.

Pixels to add on left.

Pixels to add on right.

Pixels to add on top.

Pixels to add on bottom.

Target width (centered).

Target height (centered).

Padding color.

Opposite of pnmcrop. Part of Netpbm suite.

pnmpad was created as part of Netpbm for image padding operations.

pnmcrop(1), pamcomp(1), pnmcat(1)