MinEnclosingSphere3d

sphere of minimum radius enclosing shape More...

Classes
class	ipsdk::imaproc::shape::analysis::MinEnclosingSphere3dMsr
	Measurement object for measure MinEnclosingSphere3d. More...
class	ipsdk::imaproc::shape::analysis::MinEnclosingSphere3dMsrInfo
	Information object for measure MinEnclosingSphere3d. More...

Detailed Description

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.

See also

https://en.wikipedia.org/wiki/Bounding_sphere

Author

E.Noirfalise

Date

2017/05/23

Copyright

2017 Reactiv'IP, all right reserved.

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

Measure Type :

This is a geometry 3d measure

• it use shape 3d data to compute a result
• it optionally can use dependencies to other measures to compute a result (see Measure Dependencies section)

This measure can only be used in 3d case

Measure Unit Type:

Measure MinEnclosingSphere3d is not associated to any unit [ipsdk::shape::analysis::eMsrUnitFormat::eMUF_NoUnit]

Measure Parameter Type :

Measure MinEnclosingSphere3d has no parameters

Measure Result Type :

Measure MinEnclosingSphere3d is associated to Sphere3dMsrResults results

Measure Shape Requirements :

Measure MinEnclosingSphere3d requires boundary approximation from shape data

Measure Dependencies :

Measure MinEnclosingSphere3d has no dependency

Note

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

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());