circle of maximum radius enclosed by shape

This measure allows to compute enclosed circle of maximum radius for each shape.

Given a shape, algorithm will compute coordinates of the circle inscribed into shape with maximum radius :

Computation can take care of shape holes or simply ignore it :

This behavior is ruled by measure parameter, see ipsdk::imaproc::shape::analysis::MaxInscribedBallMsrParams.

Here is an example of enclosed circle of maximum radius computation on a grey scale image:

circle of maximum radius enclosed by shape

Measure synthesis :

Measure Type	Measure Unit Type	Parameter Type	Result Type	Shape Requirements
Generic	None	MaxInscribedCircle2dMsrParams	Custom	Boundary Approximation

See Shape measurement for additional information on these pictograms

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, "MaxInscribedCircle2dMsr")
    
    #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("MaxInscribedCircle2dMsr")
    
    # retrieve measure values
    outMsrValues = outMsr.getMeasureResult().getColl(0)
    print("First label estimation radius : " + str(outMsrValues[1].getRadius()))
    print("First label estimation center : " + str(outMsrValues[1].centerX()) + ", " + str(outMsrValues[1].centerY()))

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, "MaxInscribedCircle2dMsr");
    
    // compute measure on shape 2d collection
    MeasureSetPtr pOutMeasureSet = shapeAnalysis2d(pInGreyImg2d, pShape2dColl, pMeasureInfoSet);
    // retrieve associated results
    const MeasureConstPtr& pMaxInscribedCircle2dOutMsr = pOutMeasureSet->getMeasure("MaxInscribedCircle2dMsr");
    const Circle2dMsrResults& outResults = static_cast<const Circle2dMsrResults&>(pMaxInscribedCircle2dOutMsr->getMeasureResult());