Distance to nearest barycenter 3d

computation of distance from shape barycenter to nearest neighbor shape barycenter for each shape More...

Classes
class	ipsdk::imaproc::shape::analysis::DistanceToNearestBarycenter3dMsr
	Measurement object for measure DistanceToNearestBarycenter3d. More...
class	ipsdk::imaproc::shape::analysis::DistanceToNearestBarycenter3dMsrInfo
	Information object for measure DistanceToNearestBarycenter3d. More...

Detailed Description

computation of distance from shape barycenter to nearest neighbor shape barycenter for each shape

This measure allows to compute the distance from the shape barycenter to its nearest neighbor shape barycenter. It is based on a geometric analysis of shape neighborhood.

Here is an example of nearest barycenter computation for a sample of shapes :

In the previous figure, the distance to the nearest barycenter is illustrated using a color map starting on green colors for lower distance and ending on red color for higher distances

Author

E.Noirfalise

Date

2018/07/23

Copyright

2018 Reactiv'IP, all right reserved.

computation of distance from shape barycenter to nearest neighbor shape barycenter for each shape

Measure synthesis :

Measure Type	Measure Unit Type	Parameter Type	Result Type	Shape Requirements
Geometry 3d	Length	None	Value (ipsdk::ipReal64)	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 DistanceToNearestBarycenter3d is associated to a length measurement unit [ipsdk::shape::analysis::eMsrUnitFormat::eMUF_LengthUnit]

Measure Parameter Type :

Measure DistanceToNearestBarycenter3d has no parameters

Measure Result Type :

Measure DistanceToNearestBarycenter3d is associated to ipsdk::shape::analysis::ValueMeasureResult<ipsdk::ipReal64> results

Measure Shape Requirements :

Measure DistanceToNearestBarycenter3d requires row intersections from shape data

Measure Dependencies :

Measure DistanceToNearestBarycenter3d depends on following measures :

Measure Mode	Measure Name	Measure Type	Measure Parameters
eMVP_3d	Barycenter3dCollRTree	Barycenter3dCollRTree
eMVP_3d	Barycenter	Barycenter3d

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, "DistanceToNearestBarycenter3dMsr")
    
    #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("DistanceToNearestBarycenter3dMsr")
    
    # 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);

    // 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, "DistanceToNearestBarycenter3dMsr");
    
    // compute measure on shape 3d collection
    MeasureSetPtr pOutMeasureSet = shapeAnalysis3d(pInGreyImg3d, pShape3dColl, pMeasureInfoSet);

    // retrieve associated results
    const MeasureConstPtr& pDistanceToNearestBarycenter3dOutMsr = pOutMeasureSet->getMeasure("DistanceToNearestBarycenter3dMsr");
    const ipsdk::shape::analysis::ValueMeasureResult<ipsdk::ipReal64>& outResults = static_cast<const ipsdk::shape::analysis::ValueMeasureResult<ipsdk::ipReal64>&>(pDistanceToNearestBarycenter3dOutMsr->getMeasureResult());