ConvexHullVolume3d

Measure allowing to compute the volume of the 3d convex hull for shape. More...

Classes
class	ipsdk::imaproc::shape::analysis::ConvexHullVolume3dMsr
	Measurement object for measure ConvexHullVolume3d. More...
class	ipsdk::imaproc::shape::analysis::ConvexHullVolume3dMsrInfo
	Information object for measure ConvexHullVolume3d. More...

Detailed Description

Measure allowing to compute the volume of the 3d convex hull for shape.

The ConvexHullVolume3d measure computes the volume of the convex hull calculated for each shape.

Here is an example of volume 3d measurement :

See [Concept] Convex Hull 3d for more details about the convex hull calculation and Volume3d for more details about the volume computation.

Author

H. Delestre

Date

2016/03/21

Copyright

2016 Reactiv'IP, all right reserved.

Measure allowing to compute the volume of the 3d convex hull for shape

Measure synthesis :

Measure Type	Measure Unit Type	Parameter Type	Result Type	Shape Requirements
Generic	Volume	None	Value (ipsdk::ipReal64)	Boundary Approximation

See Shape measurement for additional information on these pictograms

Measure Type :

This is a generic measure

• it does not directly use shape or image data
• it 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 ConvexHullVolume3d is associated to a volume measurement unit [ipsdk::shape::analysis::eMsrUnitFormat::eMUF_VolumeUnit]

Measure Parameter Type :

Measure ConvexHullVolume3d has no parameters

Measure Result Type :

Measure ConvexHullVolume3d is associated to ipsdk::shape::analysis::ValueMeasureResult<ipsdk::ipReal64> results

Measure Shape Requirements :

Measure ConvexHullVolume3d requires boundary approximation from shape data

Measure Dependencies :

Measure ConvexHullVolume3d depends on following measures :

Measure Mode	Measure Name	Measure Type	Measure Parameters
eMVP_3d	ConvexHull	ConvexHull3d

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, "ConvexHullVolume3dMsr")
    
    #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("ConvexHullVolume3dMsr")
    
    # 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, "ConvexHullVolume3dMsr");

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

    // retrieve associated results
    const MeasureConstPtr& pConvexHullVolume3dOutMsr = pOutMeasureSet->getMeasure("ConvexHullVolume3dMsr");
    const ValueMeasureResult<ipReal64>& outResults = static_cast<const ValueMeasureResult<ipReal64>&>(pConvexHullVolume3dOutMsr->getMeasureResult());