HALCON 18.11.0.0 / HALCON Operator Reference / Regions / Transformations
ClassesClasses | | Operators

rank_regionrank_regionRankRegionRankRegion (Operator)

Name

rank_regionrank_regionRankRegionRankRegion — Rank operator for regions.

Signature

rank_region(Region : RegionCount : Width, Height, Number : )

Herror rank_region(const Hobject Region, Hobject* RegionCount, const Hlong Width, const Hlong Height, const Hlong Number)

Herror T_rank_region(const Hobject Region, Hobject* RegionCount, const Htuple Width, const Htuple Height, const Htuple Number)

void RankRegion(const HObject& Region, HObject* RegionCount, const HTuple& Width, const HTuple& Height, const HTuple& Number)

HRegion HRegion::RankRegion(Hlong Width, Hlong Height, Hlong Number) const

static void HOperatorSet.RankRegion(HObject region, out HObject regionCount, HTuple width, HTuple height, HTuple number)

HRegion HRegion.RankRegion(int width, int height, int number)

Description

rank_regionrank_regionRankRegionRankRegionRankRegion calculates the binary rank operator. A filter mask of size HeightHeightHeightHeightheight x WidthWidthWidthWidthwidth) is used. In the process, for each point in the region the number of points of RegionRegionRegionRegionregion lying within the filter mask are counted. If this number is greater or equal to NumberNumberNumberNumbernumber, the current point is added to the output region. If is chosen, the median operator is obtained.

Attention

For HeightHeightHeightHeightheight and WidthWidthWidthWidthwidth only odd values > 3 are valid. If invalid parameters are chosen they are converted automatically (without raising an exception) to the next larger odd values.

Execution Information

Parameters

RegionRegionRegionRegionregion (input_object)  region(-array) → objectHRegionHRegionHobject

Region(s) to be transformed.

RegionCountRegionCountRegionCountRegionCountregionCount (output_object)  region(-array) → objectHRegionHRegionHobject *

Resulting region(s).

WidthWidthWidthWidthwidth (input_control)  extent.x → HTupleHTupleHtuple (integer) (int / long) (Hlong) (Hlong)

Width of the filter mask.

Default value: 15

Suggested values: 3, 5, 7, 9, 11, 13, 15, 17, 19, 21

Typical range of values: 3 ≤ Width Width Width Width width ≤ 511 (lin)

Minimum increment: 2

Recommended increment: 2

Restriction: Width >= 3 && odd(Width)

HeightHeightHeightHeightheight (input_control)  extent.y → HTupleHTupleHtuple (integer) (int / long) (Hlong) (Hlong)

Height of the filter mask.

Default value: 15

Suggested values: 3, 5, 7, 9, 11, 13, 15, 17, 19, 21

Typical range of values: 3 ≤ Height Height Height Height height ≤ 511 (lin)

Minimum increment: 2

Recommended increment: 2

Restriction: Height >= 3 && odd(Height)

NumberNumberNumberNumbernumber (input_control)  integer → HTupleHTupleHtuple (integer) (int / long) (Hlong) (Hlong)

Minimum number of points lying within the filter mask.

Default value: 70

Suggested values: 5, 10, 20, 40, 60, 80, 90, 120, 150, 200

Typical range of values: 1 ≤ Number Number Number Number number ≤ 1000 (lin)

Minimum increment: 1

Recommended increment: 10

Restriction: Number > 0

Example (HDevelop)

read_image(Image,'monkey')
mean_image(Image,Mean,5,5)
dyn_threshold(Image,Mean,Points,25,'light')
rank_region(Points,Textur,15,15,30)
gen_circle(Mask,10,10,3)
opening(Textur,Mask,Seg)

Example (C)

read_image(&Image,"monkey");
mean_image(Image,&Mean,5,5);
dyn_threshold(Image,Mean,&Points,25,"light");
rank_region(Points,Textur,15,15,30);
gen_circle(&Mask,10,10,3);
opening(Textur,Mask,&Seg);

Example (HDevelop)

read_image(Image,'monkey')
mean_image(Image,Mean,5,5)
dyn_threshold(Image,Mean,Points,25,'light')
rank_region(Points,Textur,15,15,30)
gen_circle(Mask,10,10,3)
opening(Textur,Mask,Seg)

Example (HDevelop)

read_image(Image,'monkey')
mean_image(Image,Mean,5,5)
dyn_threshold(Image,Mean,Points,25,'light')
rank_region(Points,Textur,15,15,30)
gen_circle(Mask,10,10,3)
opening(Textur,Mask,Seg)

Example (HDevelop)

read_image(Image,'monkey')
mean_image(Image,Mean,5,5)
dyn_threshold(Image,Mean,Points,25,'light')
rank_region(Points,Textur,15,15,30)
gen_circle(Mask,10,10,3)
opening(Textur,Mask,Seg)

Complexity

Let F be the area of the input region. Then the runtime complexity is O(F * 8).

Result

rank_regionrank_regionRankRegionRankRegionRankRegion returns 2 (H_MSG_TRUE) if all parameters are correct. The behavior in case of empty input (no regions given) can be set via set_system('no_object_result',<Result>)set_system("no_object_result",<Result>)SetSystem("no_object_result",<Result>)SetSystem("no_object_result",<Result>)SetSystem("no_object_result",<Result>) and the behavior in case of an empty input region via set_system('empty_region_result',<Result>)set_system("empty_region_result",<Result>)SetSystem("empty_region_result",<Result>)SetSystem("empty_region_result",<Result>)SetSystem("empty_region_result",<Result>). If necessary, an exception is raised.

Possible Predecessors

thresholdthresholdThresholdThresholdThreshold, connectionconnectionConnectionConnectionConnection, regiongrowingregiongrowingRegiongrowingRegiongrowingRegiongrowing, pouringpouringPouringPouringPouring, class_ndim_normclass_ndim_normClassNdimNormClassNdimNormClassNdimNorm

Possible Successors

select_shapeselect_shapeSelectShapeSelectShapeSelectShape, disp_regiondisp_regionDispRegionDispRegionDispRegion

Alternatives

closing_rectangle1closing_rectangle1ClosingRectangle1ClosingRectangle1ClosingRectangle1, expand_regionexpand_regionExpandRegionExpandRegionExpandRegion

See also

rank_imagerank_imageRankImageRankImageRankImage, mean_imagemean_imageMeanImageMeanImageMeanImage

Module

Foundation

ClassesClasses | | Operators
HALCON Operator Reference 18.11.0.0 Copyright © 1996-2018 MVTec Software GmbH