Task: imsub Purpose: Extract subportion of an image Categories: map manipulation IMSUB is a MIRIAD task which extracts a subportion of an image. Key: in The input image. No default. Key: out The output image. No default. Key: region The region of interest. The default is the entire input image. See the Users Manual for instructions on how to specify this. Key: incr Increment to be used along each axis. Default is 1.