Morphological segmentation
#include "dip_morphology.h"
dip_Error dip_SeededWatershed ( seeds, in, mask, out, connectivity, order, max_depth, max_size, binaryOutput )
integer, float
Watershed segmentation with built-in region merging. max_depth and max_size control the merging procedure. Any region with max_size or less pixels and with max_depth grey-value difference or less will be merged to neighbouring regions when they touch (as opposed to build a watershed). max_size equal to 0 means that the size of the region is not tested when merging. To avoid merging of seeds with no grey-value difference between them, set max_size to a negative value. The regions are grown according to the connectivity parameter. See The connectivity parameter for more information. The output is either a labelled image where the pixels belonging to a catchment basin are labelled, or a binary image where the watershed pixels are 1 and the rest is 0. This is controlled by binaryOutput.
As opposed to Watershed, this function takes a seeds input image, and grows the catchment basins from there. The output image, when binaryOutput is DIP_TRUE, will have label values as given by the seed image.
If mask is not 0, only the pixels within mask will be considered. All the other pixels will be untouched.
| Data type | Name | Description |
| dip_Image | seeds | Binary or labelled input image |
| dip_Image | in | Grey-value input image |
| dip_Image | mask | Mask image |
| dip_Image | out | Output |
| dip_int | connectivity | Connectivity |
| dipf_GreyValueSortOrder | order | Whether to grow from low to high or high to low |
| dip_float | max_depth | Maximum depth of a region that can be merged |
| dip_int | max_size | Maximum size of a region that can be merged |
| dip_Boolean | binaryOutput | DIP_FALSE if the output should be a labelled image |
The dipf_GreyValueSortOrder enumeration consists of the following values:
| Name | Description |
| DIP_GVSO_HIGH_FIRST | Process the pixels from high grey-value to low grey-value. |
| DIP_GVSO_LOW_FIRST | Process the pixels from low grey-value to high grey-value. |
Watershed, LocalMinima, Minima, Maxima, GrowRegions
DIPlib on-line documentation | Function reference | Global function index