opening_rectangle1OpeningRectangle1OpeningRectangle1opening_rectangle1opening_rectangle1

HALCON ScriptCpp++.NETPythonC

Short description

opening_rectangle1OpeningRectangle1OpeningRectangle1opening_rectangle1opening_rectangle1 — Open a region with a rectangular structuring element.

Signature

opening_rectangle1( region Region, out region RegionOpening, extent.x Width, extent.y Height )void OpeningRectangle1( const HObject& Region, HObject* RegionOpening, const HTuple& Width, const HTuple& Height )static void HOperatorSet.OpeningRectangle1( HObject region, out HObject regionOpening, HTuple width, HTuple height )def opening_rectangle1( region: HObject, width: int, height: int ) -> HObject

Herror opening_rectangle1( const Hobject Region, Hobject* RegionOpening, const Hlong Width, const Hlong Height )

Herror T_opening_rectangle1( const Hobject Region, Hobject* RegionOpening, const Htuple Width, const Htuple Height )

HRegion HRegion::OpeningRectangle1( Hlong Width, Hlong Height ) const

HRegion HRegion.OpeningRectangle1( int width, int height )

Description

opening_rectangle1OpeningRectangle1 behaves as openingOpening with a rectangular structuring element on the input region Regionregionregion. The size of the rectangular structuring element is determined by the parameters Widthwidthwidth and Heightheightheight. As is the case for all openingOpening variants, larger structures are preserved, while small regions like lines or points are eliminated.

Similar to erosion_rectangle1ErosionRectangle1 and dilation_rectangle1DilationRectangle1 opening_rectangle1OpeningRectangle1 is a very fast operation.

Execution information

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

Regionregionregion (input_object) region(-array) → objectHObjectHRegionHObjectHobject

Regions to be opened.

RegionOpeningregionOpeningregion_opening (output_object) region(-array) → objectHObjectHRegionHObjectHobject *

Opened regions.

Widthwidthwidth (input_control) extent.x → (integer)HTuple (Hlong)HTuple (int / long)intHtuple (Hlong)

Width of the structuring rectangle.

Default: 1010
Suggested values: 1, 2, 3, 4, 5, 7, 9, 12, 15, 19, 25, 33, 45, 60, 110, 150, 2001, 2, 3, 4, 5, 7, 9, 12, 15, 19, 25, 33, 45, 60, 110, 150, 200
Value range: 1 ≤ Width ≤ 511 (lin)
Minimum increment: 1
Recommended increment: 1

Heightheightheight (input_control) extent.y → (integer)HTuple (Hlong)HTuple (int / long)intHtuple (Hlong)

Height of the structuring rectangle.

Default: 1010
Suggested values: 1, 2, 3, 4, 5, 7, 9, 12, 15, 19, 25, 33, 45, 60, 110, 150, 2001, 2, 3, 4, 5, 7, 9, 12, 15, 19, 25, 33, 45, 60, 110, 150, 200
Value range: 1 ≤ Height ≤ 511 (lin)
Minimum increment: 1
Recommended increment: 1

Complexity

Let \(F1\) be the area of an input region and \(H\) be the height of the rectangle. Then the runtime complexity for one region is:

\[\begin{eqnarray*} O(2 \cdot \sqrt{F1} \cdot ld(H)) \enspace . \end{eqnarray*}\]

Result

opening_rectangle1OpeningRectangle1 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.

Combinations with other operators

Combinations

Possible predecessors

thresholdThreshold, regiongrowingRegiongrowing, watershedsWatersheds, class_ndim_normClassNdimNorm

Possible successors

reduce_domainReduceDomain, select_shapeSelectShape, area_centerAreaCenter, connectionConnection

Alternatives

openingOpening, gen_rectangle1GenRectangle1, dilation_rectangle1DilationRectangle1, erosion_rectangle1ErosionRectangle1

Module

Foundation