thinningthinningThinningThinningthinning (Operator)

Name

thinningthinningThinningThinningthinning — Remove the result of a hit-or-miss operation from a region.

Warning

thinningthinningThinningThinningThinningthinning is obsolete and is only provided for reasons of backward compatibility.

Signature

Description

thinningthinningThinningThinningThinningthinning performs a thinning of the input regions using morphological operations. The operator first applies a hit-or-miss-transformation to RegionRegionRegionRegionregionregion (cf. hit_or_misshit_or_missHitOrMissHitOrMissHitOrMisshit_or_miss), and then removes the detected points from the input region. The parameter IterationsIterationsIterationsIterationsiterationsiterations determines the number of iterations performed.

For the choice of the structuring elements StructElement1StructElement1StructElement1StructElement1structElement1struct_element_1 and StructElement2StructElement2StructElement2StructElement2structElement2struct_element_2, as well as for RowRowRowRowrowrow and ColumnColumnColumnColumncolumncolumn, the same restrictions described under hit_or_misshit_or_missHitOrMissHitOrMissHitOrMisshit_or_miss apply.

Structuring elements (StructElement1StructElement1StructElement1StructElement1structElement1struct_element_1, StructElement2StructElement2StructElement2StructElement2structElement2struct_element_2) can be generated with operators such as gen_circlegen_circleGenCircleGenCircleGenCirclegen_circle, gen_rectangle1gen_rectangle1GenRectangle1GenRectangle1GenRectangle1gen_rectangle1, gen_rectangle2gen_rectangle2GenRectangle2GenRectangle2GenRectangle2gen_rectangle2, gen_ellipsegen_ellipseGenEllipseGenEllipseGenEllipsegen_ellipse, draw_regiondraw_regionDrawRegionDrawRegionDrawRegiondraw_region, gen_region_polygongen_region_polygonGenRegionPolygonGenRegionPolygonGenRegionPolygongen_region_polygon, gen_region_pointsgen_region_pointsGenRegionPointsGenRegionPointsGenRegionPointsgen_region_points, etc.

Execution Information

• Multithreading type: reentrant (runs in parallel with non-exclusive operators).
• Multithreading scope: global (may be called from any thread).
• Automatically parallelized on tuple level.

Parameters

Complexity

Let F be the area of an input region, F1 the area of the structuring element 1, and F2 the area of the structuring element 2. Then the runtime complexity for one object is:

Result

thinningthinningThinningThinningThinningthinning returns 2 (H_MSG_TRUE) if all parameters are correct. The behavior in case of empty or no input region can be set via:

• no region: set_system('no_object_result',<RegionResult>)

• empty region: set_system('empty_region_result',<RegionResult>)

Otherwise, an exception is raised.

Possible Predecessors

thresholdthresholdThresholdThresholdThresholdthreshold, regiongrowingregiongrowingRegiongrowingRegiongrowingRegiongrowingregiongrowing, connectionconnectionConnectionConnectionConnectionconnection, union1union1Union1Union1Union1union1, watershedswatershedsWatershedsWatershedsWatershedswatersheds, class_ndim_normclass_ndim_normClassNdimNormClassNdimNormClassNdimNormclass_ndim_norm, gen_circlegen_circleGenCircleGenCircleGenCirclegen_circle, gen_ellipsegen_ellipseGenEllipseGenEllipseGenEllipsegen_ellipse, gen_rectangle1gen_rectangle1GenRectangle1GenRectangle1GenRectangle1gen_rectangle1, gen_rectangle2gen_rectangle2GenRectangle2GenRectangle2GenRectangle2gen_rectangle2, draw_regiondraw_regionDrawRegionDrawRegionDrawRegiondraw_region, gen_region_pointsgen_region_pointsGenRegionPointsGenRegionPointsGenRegionPointsgen_region_points, gen_region_polygon_filledgen_region_polygon_filledGenRegionPolygonFilledGenRegionPolygonFilledGenRegionPolygonFilledgen_region_polygon_filled

Possible Successors

reduce_domainreduce_domainReduceDomainReduceDomainReduceDomainreduce_domain, select_shapeselect_shapeSelectShapeSelectShapeSelectShapeselect_shape, area_centerarea_centerAreaCenterAreaCenterAreaCenterarea_center, connectionconnectionConnectionConnectionConnectionconnection

Alternatives

thinning_golaythinning_golayThinningGolayThinningGolayThinningGolaythinning_golay, thinning_seqthinning_seqThinningSeqThinningSeqThinningSeqthinning_seq

See also

hit_or_misshit_or_missHitOrMissHitOrMissHitOrMisshit_or_miss

Module

Foundation