hit_or_misshit_or_missHitOrMissHitOrMisshit_or_miss (Operator)

Name

hit_or_misshit_or_missHitOrMissHitOrMisshit_or_miss — Hit-or-miss operation for regions.

Signature

hit_or_miss(Region, StructElement1, StructElement2 : RegionHitMiss : Row, Column : )

Description

hit_or_misshit_or_missHitOrMissHitOrMisshit_or_miss performs the hit-or-miss-transformation. First, an erosion with the structuring element StructElement1StructElement1StructElement1structElement1struct_element_1 is done on the input region RegionRegionRegionregionregion. Then an erosion with the structuring element StructElement2StructElement2StructElement2structElement2struct_element_2 is performed on the complement of the input region. The intersection of the two resulting regions is the result RegionHitMissRegionHitMissRegionHitMissregionHitMissregion_hit_miss of hit_or_misshit_or_missHitOrMissHitOrMisshit_or_miss.

The hit-or-miss-transformation selects precisely the points for which the conditions given by the structuring elements StructElement1StructElement1StructElement1structElement1struct_element_1 and StructElement2StructElement2StructElement2structElement2struct_element_2 are fulfilled. StructElement1StructElement1StructElement1structElement1struct_element_1 determines the condition for the foreground pixels, while StructElement2StructElement2StructElement2structElement2struct_element_2 determines the condition for the background pixels. In order to obtain sensible results, StructElement1StructElement1StructElement1structElement1struct_element_1 and StructElement2StructElement2StructElement2structElement2struct_element_2 must fit like key and lock. In any case, StructElement1StructElement1StructElement1structElement1struct_element_1 and StructElement2StructElement2StructElement2structElement2struct_element_2 must be disjunct. RowRowRowrowrow and ColumnColumnColumncolumncolumn determine the reference point of the structuring elements.

Structuring elements (StructElement1StructElement1StructElement1structElement1struct_element_1, StructElement2StructElement2StructElement2structElement2struct_element_2) can be generated by calling operators like gen_region_pointsgen_region_pointsGenRegionPointsGenRegionPointsgen_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

RegionRegionRegionregionregion (input_object) region(-array) → object

Regions to be processed.

StructElement1StructElement1StructElement1structElement1struct_element_1 (input_object) region → object

Erosion mask for the input regions.

StructElement2StructElement2StructElement2structElement2struct_element_2 (input_object) region → object

Erosion mask for the complements of the input regions.

RegionHitMissRegionHitMissRegionHitMissregionHitMissregion_hit_miss (output_object) region(-array) → object

Result of the hit-or-miss operation.

RowRowRowrowrow (input_control) point.y → (integer)

Row coordinate of the reference point.

Default: 16

Suggested values: 0, 16, 32, 128, 256

Value range: 0 ≤ Row Row Row row row ≤ 511 (lin)

Minimum increment: 1

Recommended increment: 1

ColumnColumnColumncolumncolumn (input_control) point.x → (integer)

Column coordinate of the reference point.

Default: 16

Suggested values: 0, 16, 32, 128, 256

Value range: 0 ≤ Column Column Column column column ≤ 511 (lin)

Minimum increment: 1

Recommended increment: 1

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

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