shrink_map(1L)

NAME
Shrink_map - Shrink a MGR bitmap to 1/2 size.

SYNOPSIS
< image shrink_map <thresh> > image.small

DESCRIPTION
Shrink_map reads an MGR (1 bit per pixel) bitmap from standard input, shrinks it in half, and writes the result to sandard output. The thres argument is used to specify how many in each group of 4 pixels need to be set before the corrosponding output pixel is set.

BUGS

*   The algorithm was intended for reducing many images at once, and is inefficient when dealing with one image at a time.

SEE ALSO
mgr(1L) bitmap(4L)

AUTHOR
S. A. Uhler