| auto_threshold | Segment an image using thresholds determined from its histogram. |
| bin_threshold | Segment an image using an automatically determined threshold. |
| char_threshold | Perform a threshold segmentation for extracting characters. |
| check_difference | Compare two images pixel by pixel. |
| dual_threshold | Threshold operator for signed images. |
| dyn_threshold | Segment an image using a local threshold. |
| fast_threshold | Fast thresholding of images using global thresholds. |
| histo_to_thresh | Determine gray value thresholds from a histogram. |
| threshold | Segment an image using global threshold. |
| threshold_sub_pix | Extract level crossings from an image with subpixel accuracy. |
| var_threshold | Threshold an image by local mean and standard deviation analysis. |
| zero_crossing | Extrakt zero crossings from an image. |
| zero_crossing_sub_pix | Extract zero crossings from an image with subpixel accuracy. |