|  |  |  | mrabs |  | 
|---|
take absolute value of image intensity
syntax: mrabs [ options ] input output
| input | the input image. | 
| output | the output image. | 
| -info | display information messages. | 
| -quiet | do not display information messages or progress status. | 
| -debug | display debugging messages. | 
| -help | display this information page and exit. | 
| -version | display version information and exit. |