| abs_image | Calculate the absolute value (modulus) of an image. |
| add_image | Add two images. |
| div_image | Divide two images. |
| invert_image | Invert an image. |
| max_image | Calculate the maximum of two images pixel by pixel. |
| min_image | Calculate the minimum of two images pixel by pixel. |
| mult_image | Multiply two images. |
| scale_image | Scale the gray values of an image. |
| sub_image | Subtract two images. |