| abs1__ | Calculate the absolute value (modulus) of an image. |
| add__ | Add two images. |
| div__ | Divide two images. |
| invert | Invert an image. |
| max2__ | Calculate the maximum of two images pixel by pixel. |
| min2__ | Calculate the minimum of two images pixel by pixel. |
| mult__ | Multiply two images. |
| scale__ | Scale the gray values of an image. |
| sub__ | Subtract two images. |