Compute the bottom hat of regions.
bottom_hat computes the closing of Region with StructElement. The difference between the result of the closing and the original region is called the bottom hat. In contrast to closing, which merges regions under certain circumstances, bottom_hat computes the regions generated by such a merge.
The position of StructElement is meaningless, since a closing operation is invariant with respect to the choice of the reference point.
Structuring elements (StructElement) can be generated with operators such as gen_circle, gen_rectangle1, gen_rectangle2, gen_ellipse, draw_region, gen_region_polygon, gen_region_points, etc.
|
Region (input_object) |
region(-array) -> object |
| Regions to be processed. | |
|
StructElement (input_object) |
region -> object |
| Structuring element (position independent). | |
|
RegionBottomHat (output_object) |
region(-array) -> object |
| Result of the bottom hat operator. | |
read_image (Image,'/bilder/name.ext') threshold (Image,Regions,128,255) gen_circle (Circle,0,0,16) bottom_hat (Regions,Circle,RegionBottomHat).
bottom_hat returns 2 (H_MSG_TRUE) if all parameters are correct. The behavior in case of empty or no input region can be set via:
a) no region: set_system('no_object_result',<RegionResult>)
b) empty region: set_system('empty_region_result',<RegionResult>)
Otherwise, an exception is raised.
bottom_hat is reentrant and automatically parallelized (on tuple level).
threshold, regiongrowing, connection, union1, watersheds, class_ndim_norm, gen_circle, gen_ellipse, gen_rectangle1, gen_rectangle2, draw_region, gen_region_points, gen_struct_elements, gen_region_polygon_filled
reduce_domain, select_shape, area_center, connection
top_hat, morph_hat, gray_bothat, opening
Foundation
