HistogramQuantile

gives the quantile of the intensity histogram More...

Classes
class	ipsdk::imaproc::shape::analysis::HistogramQuantileMsr
	Measurement object for measure HistogramQuantile. More...
class	ipsdk::imaproc::shape::analysis::HistogramQuantileMsrInfo
	Information object for measure HistogramQuantile. More...
class	ipsdk::imaproc::shape::analysis::HistogramQuantileMsrParams
	Parameter object for measure HistogramQuantile. More...
IPSDKIPLSHAPEANALYSIS_API HistogramQuantileMsrParamsPtr	ipsdk::imaproc::shape::analysis::createHistogramQuantileMsrParams (const HistogramMsrParams &histoMsrParams, const ipReal64 rate)
	function allowing to create a new parameter object for HistogramQuantile measure
IPSDKIPLSHAPEANALYSIS_API HistogramQuantileMsrParamsPtr	ipsdk::imaproc::shape::analysis::createHistogramQuantileMsrParamsBinWidth (const ipReal64 binWidth, const ipReal64 rate)
	function allowing to create a new parameter object for HistogramQuantile measure
IPSDKIPLSHAPEANALYSIS_API HistogramQuantileMsrParamsPtr	ipsdk::imaproc::shape::analysis::createHistogramQuantileMsrParamsBinWidth (const ipReal64 binWidth, const ipReal64 histoMin, const ipReal64 histoMax, const ipReal64 rate)
	function allowing to create a new parameter object for HistogramQuantile measure
IPSDKIPLSHAPEANALYSIS_API HistogramQuantileMsrParamsPtr	ipsdk::imaproc::shape::analysis::createHistogramQuantileMsrParamsMinMaxShapeNbClasses (const ipUInt32 nbClasses, const ipReal64 rate)
	function allowing to create a new parameter object for HistogramQuantile measure
IPSDKIPLSHAPEANALYSIS_API HistogramQuantileMsrParamsPtr	ipsdk::imaproc::shape::analysis::createHistogramQuantileMsrParamsMinMaxImgNbClasses (const ipUInt32 nbClasses, const ipReal64 rate)
	function allowing to create a new parameter object for HistogramQuantile measure
IPSDKIPLSHAPEANALYSIS_API HistogramQuantileMsrParamsPtr	ipsdk::imaproc::shape::analysis::createHistogramQuantileMsrParamsNbClasses (const ipUInt32 nbClasses, const ipReal64 histoMin, const ipReal64 histoMax, const ipReal64 rate)
	function allowing to create a new parameter object for HistogramQuantile measure

Detailed Description

gives the quantile of the intensity histogram

HistogramQuantile measure computes, for a given rate (expressed in percent), the quantile on the intensity histogram of the shape.

For a given rate , the quantile q is the minimal intensity value for which , with the number of pixels in the shape.

Here is an example of histogram quantile measurement (rate=25%) in 2d case :

Author

H. Delestre

Date

2015/07/09

Copyright

2015 Reactiv'IP, all right reserved.

gives the quantile of the intensity histogram computed on shape for a given rate

Measure synthesis :

Measure Type	Measure Unit Type	Parameter Type	Result Type	Shape Requirements
Generic	None	HistogramQuantileMsrParams	Value (ipsdk::ipReal64)	Row Intersections

See Shape measurement for additional information on these pictograms

Measure Type :

This is a generic measure

• it does not directly use shape or image data
• it can use dependencies to other measures to compute a result (see Measure Dependencies section)

This measure can be used in 2d and 3d case

Measure Unit Type:

Measure HistogramQuantile is not associated to any unit [ipsdk::shape::analysis::eMsrUnitFormat::eMUF_NoUnit]

Measure Parameter Type :

Measure HistogramQuantile is associated to HistogramQuantileMsrParams parameters

Measure Result Type :

Measure HistogramQuantile is associated to ipsdk::shape::analysis::ValueMeasureResult<ipsdk::ipReal64> results

Measure Shape Requirements :

Measure HistogramQuantile requires row intersections from shape data

Measure Dependencies :

Measure HistogramQuantile depends on following measures :

Measure Mode	Measure Name	Measure Type	Measure Parameters
eMVP_2d3d	Histogram	Histogram	createHistogramMsrParams(_pMsrParams->getNode<HistogramQuantileMsrParams::HistoParams>())
eMVP_2d	NbPixels	NbPixels2d
eMVP_3d	NbPixels	NbPixels3d

Note

See Shape Analysis 2d for more information on general shape 2d analysis and measurement usage.

See Shape Analysis 3d for more information on general shape 3d analysis and measurement usage.

Example of Python code :

Generic example in 2d case :

import PyIPSDK
import PyIPSDK.IPSDKIPLShapeAnalysis as shapeanalysis

    # Create the infoset
    inMeasureInfoSet2d = PyIPSDK.createMeasureInfoSet2d()
    PyIPSDK.createMeasureInfo(inMeasureInfoSet2d, "HistogramQuantileMsr")
    
    #Perform the analysis
    outMeasureSet = shapeanalysis.labelAnalysis2d(inGreyImg, inLabelImg2d, inMeasureInfoSet2d)
    
    # save results to csv format
    PyIPSDK.saveCsvMeasureFile(os.path.join(tmpPath,  "shape_analysis_results.csv"), outMeasureSet)
    
    # retrieve measure results
    outMsr = outMeasureSet.getMeasure("HistogramQuantileMsr")
    
    # retrieve measure values
    outMsrValues = outMsr.getMeasureResult().getColl(0)
    print("First label measurement equal " + str(outMsrValues[1]))

Generic example in 3d case :

import PyIPSDK
import PyIPSDK.IPSDKIPLShapeAnalysis as shapeanalysis

    # Create the infoset
    inMeasureInfoSet3d = PyIPSDK.createMeasureInfoSet3d()
    PyIPSDK.createMeasureInfo(inMeasureInfoSet3d, "HistogramQuantileMsr")
    
    #Perform the analysis
    outMeasureSet = shapeanalysis.labelAnalysis3d(inGreyImg, inLabelImg, inMeasureInfoSet3d)
    
    # save results to csv format
    PyIPSDK.saveCsvMeasureFile(os.path.join(tmpPath,  "shape_analysis_results.csv"), outMeasureSet)
    
    # retrieve measure results
    outMsr = outMeasureSet.getMeasure("HistogramQuantileMsr")
    
    # retrieve measure values
    outMsrValues = outMsr.getMeasureResult().getColl(0)
    print("First label measurement equal " + str(outMsrValues[1]))

Example of C++ code :

Example informations

Associated library

IPSDKIPLShapeAnalysis

Code Example

    // opening grey level input image
    ImagePtr pInGreyImg2d = loadTiffImageFile(inputGreyImgPath);

    // read entity shape 2d collection used for processing
    Shape2dCollPtr pShape2dColl = boost::make_shared<Shape2dColl>();
    readFromXmlFile(inputShape2dCollPath, *pShape2dColl);

    // define a measure info set
    MeasureInfoSetPtr pMeasureInfoSet = MeasureInfoSet::create2dInstance();
    createMeasureInfo(pMeasureInfoSet, "HistogramQuantileMsr", createHistogramQuantileMsrParamsBinWidth(1.0, 25.0));

    // compute measure on shape 2d collection
    MeasureSetPtr pOutMeasureSet = shapeAnalysis2d(pInGreyImg2d, pShape2dColl, pMeasureInfoSet);

    // retrieve associated results
    const MeasureConstPtr& pHistogramQuantileOutMsr = pOutMeasureSet->getMeasure("HistogramQuantileMsr");
    const ipsdk::shape::analysis::ValueMeasureResult<ipsdk::ipReal64>& outResults =
        static_cast<const ipsdk::shape::analysis::ValueMeasureResult<ipsdk::ipReal64>&>(pHistogramQuantileOutMsr->getMeasureResult());