.sp
.LP
These routines deal with subregions of images and signals.
.SH
SHORT DESCRIPTION OF ROUTINES
.IP "Extract Subimage -" 20
Extract a rectangular piece from an image and put it in a subimage.
.IP "Sample on Line -" 20
Sample an image along an arbitrary line.
.IP "Insert Subimage -" 20
Insert a (sub)image into another image.
.IP "Extract Center -" 20
Extract a rectangular image from the center of a larger image.
.IP "Pad Image -" 20
Pad an image data sequence with a constant.
