HALCON 21.11.0.0 / HALCON Operator Reference / Image / Features
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shape_histo_allT_shape_histo_allShapeHistoAllShapeHistoAllshape_histo_all (Operator)

Name

shape_histo_allT_shape_histo_allShapeHistoAllShapeHistoAllshape_histo_all — Determine a histogram of features along all threshold values.

Signature

shape_histo_all(Region, Image : : Feature : AbsoluteHisto, RelativeHisto)

Herror T_shape_histo_all(const Hobject Region, const Hobject Image, const Htuple Feature, Htuple* AbsoluteHisto, Htuple* RelativeHisto)

void ShapeHistoAll(const HObject& Region, const HObject& Image, const HTuple& Feature, HTuple* AbsoluteHisto, HTuple* RelativeHisto)

HTuple HRegion::ShapeHistoAll(const HImage& Image, const HString& Feature, HTuple* RelativeHisto) const

HTuple HRegion::ShapeHistoAll(const HImage& Image, const char* Feature, HTuple* RelativeHisto) const

HTuple HRegion::ShapeHistoAll(const HImage& Image, const wchar_t* Feature, HTuple* RelativeHisto) const   (Windows only)

static void HOperatorSet.ShapeHistoAll(HObject region, HObject image, HTuple feature, out HTuple absoluteHisto, out HTuple relativeHisto)

HTuple HRegion.ShapeHistoAll(HImage image, string feature, out HTuple relativeHisto)

def shape_histo_all(region: HObject, image: HObject, feature: str) -> Tuple[Sequence[Union[int, float]], Sequence[float]]

Description

The operator shape_histo_allshape_histo_allShapeHistoAllShapeHistoAllShapeHistoAllshape_histo_all carries out 255 threshold operations within RegionRegionRegionRegionregionregion with the gray values of ImageImageImageImageimageimage. The entry i in the histogram corresponds to the number of connected components/holes of this image segmented with the threshold i (FeatureFeatureFeatureFeaturefeaturefeature = 'connected_components'"connected_components""connected_components""connected_components""connected_components""connected_components", 'holes'"holes""holes""holes""holes""holes") or the mean value of the feature values of the regions segmented in this way (FeatureFeatureFeatureFeaturefeaturefeature = 'convexity'"convexity""convexity""convexity""convexity""convexity", 'compactness'"compactness""compactness""compactness""compactness""compactness", 'ansisometry'"ansisometry""ansisometry""ansisometry""ansisometry""ansisometry"), respectively.

Attention

The operator shape_histo_allshape_histo_allShapeHistoAllShapeHistoAllShapeHistoAllshape_histo_all expects a region and exactly one gray value image as input. Because of the power of this operator the runtime of shape_histo_allshape_histo_allShapeHistoAllShapeHistoAllShapeHistoAllshape_histo_all is relatively large!

Note that the operator shape_histo_allshape_histo_allShapeHistoAllShapeHistoAllShapeHistoAllshape_histo_all only considers the given RegionRegionRegionRegionregionregion and ignores any previously set domain of the input image ImageImageImageImageimageimage.

Execution Information

Parameters

RegionRegionRegionRegionregionregion (input_object)  region → objectHRegionHObjectHRegionHobject

Region in which the features are to be examined.

ImageImageImageImageimageimage (input_object)  singlechannelimage → objectHImageHObjectHImageHobject (byte)

Gray value image.

FeatureFeatureFeatureFeaturefeaturefeature (input_control)  string → HTuplestrHTupleHtuple (string) (string) (HString) (char*)

Feature to be examined.

Default value: 'connected_components' "connected_components" "connected_components" "connected_components" "connected_components" "connected_components"

List of values: 'anisometry'"anisometry""anisometry""anisometry""anisometry""anisometry", 'compactness'"compactness""compactness""compactness""compactness""compactness", 'connected_components'"connected_components""connected_components""connected_components""connected_components""connected_components", 'convexity'"convexity""convexity""convexity""convexity""convexity", 'holes'"holes""holes""holes""holes""holes"

AbsoluteHistoAbsoluteHistoAbsoluteHistoAbsoluteHistoabsoluteHistoabsolute_histo (output_control)  histogram-array → HTupleSequence[Union[int, float]]HTupleHtuple (real / integer) (double / int / long) (double / Hlong) (double / Hlong)

Absolute distribution of the feature.

RelativeHistoRelativeHistoRelativeHistoRelativeHistorelativeHistorelative_histo (output_control)  histogram-array → HTupleSequence[float]HTupleHtuple (real) (double) (double) (double)

Relative distribution of the feature.

Example (HDevelop)

* Simulation of shape_histo_all with feature 'connected_components':
* my_shape_histo_all(Region,Image,AbsHisto,RelHisto):
reduce_domain(Region,Image,RegionGray)
for i := 0 to 255 by 1
    threshold(RegionGray,Seg,i,255)
    connect_and_holes (Seg, NumConnected, _)
    AbsHisto[i] := NumConnected
endfor
Sum := 0
for i := 0 to 255 by 1
    Sum := Sum+AbsHisto[i]
endfor
for i := 0 to 255 by 1
    RelHisto[i] := AbsHisto[i]/Sum
endfor

Example (C)

/* Simulation of shape_histo_all with feature 'connected_components': */
my_shape_histo_all(Hobject Region,Hobject Image,
                 Hlong AbsHisto[], double RelHisto[])
{
  Hlong     i,sum;
  Hobject  RegionGray,Seg;

  reduce_domain(Region,Image,&RegionGray);
  for (i=0; i<256; i++) {
    threshold(RegionGray,&Seg,(double)i,255.0);
    connect_and_holes(Seg,&AbsHisto[i],NULL);
  }
  for (i=0; i<256; i++)
    sum += AbsHisto[i];
  for (i=0; i<256; i++)
    RelHist[i] = (double)AbsHisto[i]/Sum;
}

Example (HDevelop)

* Simulation of shape_histo_all with feature 'connected_components':
* my_shape_histo_all(Region,Image,AbsHisto,RelHisto):
reduce_domain(Region,Image,RegionGray)
for i := 0 to 255 by 1
    threshold(RegionGray,Seg,i,255)
    connect_and_holes (Seg, NumConnected, _)
    AbsHisto[i] := NumConnected
endfor
Sum := 0
for i := 0 to 255 by 1
    Sum := Sum+AbsHisto[i]
endfor
for i := 0 to 255 by 1
    RelHisto[i] := AbsHisto[i]/Sum
endfor

Example (HDevelop)

* Simulation of shape_histo_all with feature 'connected_components':
* my_shape_histo_all(Region,Image,AbsHisto,RelHisto):
reduce_domain(Region,Image,RegionGray)
for i := 0 to 255 by 1
    threshold(RegionGray,Seg,i,255)
    connect_and_holes (Seg, NumConnected, _)
    AbsHisto[i] := NumConnected
endfor
Sum := 0
for i := 0 to 255 by 1
    Sum := Sum+AbsHisto[i]
endfor
for i := 0 to 255 by 1
    RelHisto[i] := AbsHisto[i]/Sum
endfor

Example (HDevelop)

* Simulation of shape_histo_all with feature 'connected_components':
* my_shape_histo_all(Region,Image,AbsHisto,RelHisto):
reduce_domain(Region,Image,RegionGray)
for i := 0 to 255 by 1
    threshold(RegionGray,Seg,i,255)
    connect_and_holes (Seg, NumConnected, _)
    AbsHisto[i] := NumConnected
endfor
Sum := 0
for i := 0 to 255 by 1
    Sum := Sum+AbsHisto[i]
endfor
for i := 0 to 255 by 1
    RelHisto[i] := AbsHisto[i]/Sum
endfor

Complexity

If F is the area of the input region and N the mean number of connected components the runtime complexity is .

Result

The operator shape_histo_allshape_histo_allShapeHistoAllShapeHistoAllShapeHistoAllshape_histo_all returns the value TRUE if an image with the defined gray values is entered. The behavior in case of empty input (no input images) is set via the operator 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>)set_system("no_object_result",<Result>), the behavior in case of empty region is set 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>)set_system("empty_region_result",<Result>). If necessary an exception is raised.

Possible Successors

histo_to_threshhisto_to_threshHistoToThreshHistoToThreshHistoToThreshhisto_to_thresh, thresholdthresholdThresholdThresholdThresholdthreshold, gen_region_histogen_region_histoGenRegionHistoGenRegionHistoGenRegionHistogen_region_histo

Alternatives

shape_histo_pointshape_histo_pointShapeHistoPointShapeHistoPointShapeHistoPointshape_histo_point

See also

compactnesscompactnessCompactnessCompactnessCompactnesscompactness, connectionconnectionConnectionConnectionConnectionconnection, connect_and_holesconnect_and_holesConnectAndHolesConnectAndHolesConnectAndHolesconnect_and_holes, convexityconvexityConvexityConvexityConvexityconvexity, count_objcount_objCountObjCountObjCountObjcount_obj, entropy_grayentropy_grayEntropyGrayEntropyGrayEntropyGrayentropy_gray, gray_histogray_histoGrayHistoGrayHistoGrayHistogray_histo

Module

Foundation

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HALCON Operator Reference 21.11.0.0 Copyright © 1996-2021 MVTec Software GmbH
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