Rgbaautocrop can take input either from stdin or from a file specified on the command line. If a filename appears on the command line, stdin will not be checked for input.
Output is directed to stdout and errors to stderr.
Rgbaautocrop will check the RGB value of the first pixel in the image, then shrink the edges of the image such that the left, right, upper and lower edges all contain at least one pixel whose color differs from the comparison pixel. This will degrade the image quality considerably. All rights reserved.