| auto_threshold | Segment an image using thresholds determined from its histogram. |
| bin_threshold | Segment a black-and-white image using an automatically determined threshold. |
| char_threshold | Perform a threshold segmentation for extracting characters. |
| check_difference | Compare two images pixel by pixel. |
| class_2dim_sup | Segment an image using two-dimensional pixel classification. |
| class_2dim_unsup | Segment two images by clustering. |
| class_ndim_box | Classify pixels using hyper-cuboids. |
| class_ndim_norm | Classify pixels using hyper-spheres or hyper-cubes. |
| detect_edge_segments | Detect straight edge segments. |
| dual_threshold | Threshold operator for signed images. |
| dyn_threshold | Segment an image using a local threshold. |
| expand_gray | Fill gaps between regions (depending on gray value or color) or split overlapping regions. |
| expand_gray_ref | Fill gaps between regions (depending on gray value or color) or split overlapping regions. |
| expand_line | Expand a region starting at a given line. |
| fast_threshold | Fast selection of grayvalues within a given gray intervall. |
| histo_to_thresh | Determine gray value thresholds from a histogram. |
| hysteresis_threshold | Perform a hysteresis threshold operation on an image. |
| learn_ndim_box | Train the current classificator using a multi-channel image. |
| learn_ndim_norm | Construct clusters for class_ndim_norm. |
| local_max | Detect all local maxima in an image. |
| nonmax_suppression_amp | Suppress non-maximum points on an edge. |
| nonmax_suppression_dir | Suppress non-maximum points on an edge. |
| plateaus | Detect all gray value plateaus. |
| plateaus_center | Detect the centers of all gray value plateaus. |
| pouring | Segment an image by ``pouring water'' over it. |
| regiongrowing | Segment an image using regiongrowing. |
| regiongrowing_mean | Regiongrowing using mean gray values. |
| regiongrowing_n | Regiongrowing for multi-channel images. |
| threshold | Select gray values lying within an interval. |
| threshold_sub_pix | Extract level crossings from an image with subpixel accuracy. |
| watersheds | Extract watersheds and basins from an image. |
| zero_crossing | Detect zero crossings in an image. |
| zero_crossing_sub_pix | Extract zero crossings from an image with subpixel accuracy. |