Barycenter3d

Measure allowing to compute the barycenter for 3d shape. More...

Classes
class	ipsdk::imaproc::shape::analysis::Barycenter3dMsr
	Measurement object for measure Barycenter3d. More...
class	ipsdk::imaproc::shape::analysis::Barycenter3dMsrInfo
	Information object for measure Barycenter3d. More...
class	ipsdk::imaproc::shape::analysis::Barycenter3dMsrResults
	Measurement results object for measure Barycenter3d. More...

Detailed Description

Measure allowing to compute the barycenter for 3d shape.

This measure computes the coordinates of the barycenter for each shape. The barycenter is computed using Bashein / Detmer algorithm strategy.

Here is an example of barycenter measurement in 3d case :

See also GreyBarycenter.

Author

H. Delestre

Date

2016/02/25

Copyright

2016 Reactiv'IP, all right reserved.

Measure allowing to compute the barycenter for 3d shape

Measure synthesis :

Measure Type	Measure Unit Type	Parameter Type	Result Type	Shape Requirements
Geometry 3d	None	None	Custom	Row Intersections

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 Barycenter3d is not associated to any unit [ipsdk::shape::analysis::eMsrUnitFormat::eMUF_NoUnit]

Measure Parameter Type :

Measure Barycenter3d has no parameters

Measure Result Type :

Measure Barycenter3d is associated to Barycenter3dMsrResults results

Measure Shape Requirements :

Measure Barycenter3d requires row intersections from shape data

Measure Dependencies :

Measure Barycenter3d depends on following measures :

Measure Mode	Measure Name	Measure Type	Measure Parameters
eMVP_3d	NbPixels	NbPixels3d

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, "Barycenter3dMsr")
    
    #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("Barycenter3dMsr")
    
    # 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 pInGreyImg3d = loadTiffImageFile(inputGreyImgPath, eTiffDirectoryMode::eTDM_Volume);

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

    // define a measure info set
    MeasureInfoSetPtr pMeasureInfoSet = MeasureInfoSet::create3dInstance();
    createMeasureInfo(pMeasureInfoSet, "Barycenter3dMsr");
    
    // compute measure on shape 3d collection
    MeasureSetPtr pOutMeasureSet = shapeAnalysis3d(pInGreyImg3d, pShape3dColl, pMeasureInfoSet);

    // retrieve associated results
    const MeasureConstPtr& pBarycenter3dOutMsr = pOutMeasureSet->getMeasure("Barycenter3dMsr");
    const Barycenter3dMsrResults& outResults = static_cast<const Barycenter3dMsrResults&>(pBarycenter3dOutMsr->getMeasureResult());