MinEnclosingSphere3dSee full documentation

sphere of minimum radius enclosing shape

This measure allows to compute enclosing sphere of minimum radius for each shape.

Given a shape, algorithm will compute coordinates of the sphere enclosing shape with minimum radius.

Please refers to MinEnclosingCircle2d for an example of computation of minimum enclosing circle in 2d case.

sphere of minimum radius enclosing shape

Measure synthesis :

Measure Type	Measure Unit Type	Parameter Type	Result Type	Shape Requirements
Geometry 3d	None	None	Custom	Boundary Approximation

See Shape measurement for additional information on these pictograms

Example of Python code :

Generic example in 3d case :

import PyIPSDK
import PyIPSDK.IPSDKIPLShapeAnalysis as shapeanalysis

    # Create the infoset
    inMeasureInfoSet3d = PyIPSDK.createMeasureInfoSet3d()
    PyIPSDK.createMeasureInfo(inMeasureInfoSet3d, "MinEnclosingSphere3dMsr")
    
    #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("MinEnclosingSphere3dMsr")
    
    # 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()) + ", " + str(outMsrValues[1].centerZ()))

Example of C++ code :

Example informations

Associated library

IPSDKIPLShapeAnalysis

Code Example

    // opening grey level input image
    ImagePtr pInGreyImg3d = loadTiffImageFile(inputGreyImgPath);

    // read entity shape 3d collection used for processing
    Shape3dCollPtr pShape3dColl = boost::make_shared<Shape3dColl>();
    IPSDK_REQUIRE(readFromBinaryFile(inputShape3dCollPath, *pShape3dColl) == true);

    // define a measure info set
    MeasureInfoSetPtr pMeasureInfoSet = MeasureInfoSet::create3dInstance();
    createMeasureInfo(pMeasureInfoSet, "MinEnclosingSphere3dMsr");
    
    // compute measure on shape 3d collection
    MeasureSetPtr pOutMeasureSet = shapeAnalysis3d(pInGreyImg3d, pShape3dColl, pMeasureInfoSet);

    // retrieve associated results
    const MeasureConstPtr& pMinEnclosingSphere3dOutMsr = pOutMeasureSet->getMeasure("MinEnclosingSphere3dMsr");
    const Sphere3dMsrResults& outResults = static_cast<const Sphere3dMsrResults&>(pMinEnclosingSphere3dOutMsr->getMeasureResult());