Usage
if2 input-filename1 input-filename2 output-filename [options...]
Options
| - -add | Add the two images. |
| - -sub | Subtract the two images. |
| - -multiply | Multiply the two images. |
| - -divide | Divide the two images. |
| - -comp | Statistically compare the two images. The standard three distance measurements are reported. |
| - -column-plot n | Plot the values of a particular column. The plot file is saved to disk. |
| - -row-plot n | Plot the values of a particular row. The plot file is saved to disk. |