Skeleton2dMeanThickness

Mean thickness of shape 2d defined using branches of its skeleton. More...

Classes
class	ipsdk::imaproc::shape::analysis::Skeleton2dMeanThicknessMsr
	Measurement object for measure Skeleton2dMeanThickness. More...
class	ipsdk::imaproc::shape::analysis::Skeleton2dMeanThicknessMsrInfo
	Information object for measure Skeleton2dMeanThickness. More...
class	ipsdk::imaproc::shape::analysis::Skeleton2dMeanThicknessMsrParams
	Parameter object for measure Skeleton2dMeanThickness. More...

Detailed Description

Mean thickness of shape 2d defined using branches of its skeleton.

Skeleton 2d mean thickness measure is based on skeleton 2d thickness measure (see [Concept] Skeleton 2d Thickness). This measure allows to extract mean value for thicknesses of shape around edges of its skeleton.

Note

Note that measure results depend on skeleton 2d holes processing policy See [Concept] Skeleton 2d for more informations on usage of ipsdk::shape::segmentation::eSkeleton2dHolesPolicy enumerate value. If holes processing policy is set to eSHP_ExtractedAndAnalyzed, holes skeleton thickness are taken into account with respect to associated edge length for global mean thickness computation.

Here is an example of measure results for different skeleton 2d holes processing policy.

Author

E.Noirfalise

Date

2016/08/22

Copyright

2016 Reactiv'IP, all right reserved.

Mean thickness of shape 2d defined using branches of its skeleton

Measure synthesis :

Measure Type	Measure Unit Type	Parameter Type	Result Type	Shape Requirements
Generic	Length	Skeleton2dMeanThicknessMsrParams	Value (ipsdk::ipReal64)	Boundary Approximation

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 only be used in 2d case

Measure Unit Type:

Measure Skeleton2dMeanThickness is associated to a length measurement unit [ipsdk::shape::analysis::eMsrUnitFormat::eMUF_LengthUnit]

Measure Parameter Type :

Measure Skeleton2dMeanThickness is associated to Skeleton2dMeanThicknessMsrParams parameters

Measure Result Type :

Measure Skeleton2dMeanThickness is associated to ipsdk::shape::analysis::ValueMeasureResult<ipsdk::ipReal64> results

Measure Shape Requirements :

Measure Skeleton2dMeanThickness requires boundary approximation from shape data

Measure Dependencies :

Measure Skeleton2dMeanThickness depends on following measures :

Measure Mode	Measure Name	Measure Type	Measure Parameters
eMVP_2d	Thickness	Skeleton2dThickness	createSkeleton2dThicknessMsrParams(_pMsrParams->getValue<Skeleton2dMeanThicknessMsrParams::HolesPolicy>())

Note

See Shape Analysis 2d for more information on general shape 2d 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.createGeometricCalibration2d(1,1,'px'))
    PyIPSDK.createMeasureInfo(inMeasureInfoSet2d, "Skeleton2dMeanThicknessMsr", shapeanalysis.createSkeleton2dMeanThicknessMsrParams(PyIPSDK.eSHP_Ignored))
    
    #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("Skeleton2dMeanThicknessMsr")
    
    # 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>();
    IPSDK_REQUIRE(readFromXmlFile(inputShape2dCollPath, *pShape2dColl) == true);

    // define a measure info set
    MeasureInfoSetPtr pMeasureInfoSet = MeasureInfoSet::create2dInstance();
    createMeasureInfo(pMeasureInfoSet, "Skeleton2dMeanThicknessMsr", createSkeleton2dMeanThicknessMsrParams(skeleton2dHolesPolicy));
    
    // compute measure on shape 2d collection
    MeasureSetPtr pOutMeasureSet = shapeAnalysis2d(pInGreyImg2d, pShape2dColl, pMeasureInfoSet);

    // retrieve associated results
    const MeasureConstPtr& pSkeleton2dMeanThicknessOutMsr = pOutMeasureSet->getMeasure("Skeleton2dMeanThicknessMsr");
    const ipsdk::shape::analysis::ValueMeasureResult<ipsdk::ipReal64>& outResults = static_cast<const ipsdk::shape::analysis::ValueMeasureResult<ipsdk::ipReal64>&>(pSkeleton2dMeanThicknessOutMsr->getMeasureResult());