compute images statistics.
| -mask image | only perform computation within the specified binary brain mask image. 
| image | the mask image to use. |  | 
| -histogram file | generate histogram of intensities and store in specified text file. Note that the first line of the histogram gives the centre of the bins. 
| file | the text file into which to store the histogram data. |  | 
| -bins num | the number of bins to use to generate the histogram (default = 100). | 
| -dump file | dump the voxel intensities to a text file. 
| file | the text file to dump the values into. |  | 
| -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. |