Area3d

Shape 3d area measurement (measure based on polygonal approximation) More...

Classes
class	ipsdk::imaproc::shape::analysis::Area3dMsr
	Measurement object for measure Area3d. More...
class	ipsdk::imaproc::shape::analysis::Area3dMsrInfo
	Information object for measure Area3d. More...

Typedefs
typedef HolesBasicPolicyMsrParams	ipsdk::imaproc::shape::analysis::Area3dMsrParams
	parameter type associated to class

Detailed Description

Shape 3d area measurement (measure based on polygonal approximation)

Area3d measure computes the area of the surface of the polyhedral approximation of shapes. For a shape, the area is simply the sum of the areae of the triangles forming the shape mesh.

Here is an example of area 3d measurement :

Author

H. Delestre

Date

2016/02/23

Copyright

2016 Reactiv'IP, all right reserved.

Shape 3d area measurement (measure based on polyhedral approximation)

Measure synthesis :

Measure Type	Measure Unit Type	Parameter Type	Result Type	Shape Requirements
Geometry 3d	Area	Area3dMsrParams	Value (ipReal64)	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 Area3d is associated to an area measurement unit [ipsdk::shape::analysis::eMsrUnitFormat::eMUF_AreaUnit]

Measure Parameter Type :

Measure Area3d is associated to Area3dMsrParams parameters

Measure Result Type :

Measure Area3d is associated to ipsdk::shape::analysis::ValueMeasureResult<ipReal64> results

Measure Shape Requirements :

Measure Area3d requires boundary approximation from shape data

Measure Dependencies :

Measure Area3d 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, "AreaMinusHoles", "Area3dMsr", shapeanalysis.createHolesBasicPolicyMsrParams(True))
    PyIPSDK.createMeasureInfo(inMeasureInfoSet3d, "AreaWithHoles", "Area3dMsr", shapeanalysis.createHolesBasicPolicyMsrParams(False))
    
    #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
    outAreaMinusHolesMsr = outMeasureSet.getMeasure("AreaMinusHoles")
    outAreaWithHolesMsr = outMeasureSet.getMeasure("AreaWithHoles")
    
    # retrieve measure values
    outAreaWithHolesValues = outAreaWithHolesMsr.getMeasureResult().getColl(0)
    print("First label area with holes measurement equal " + str(outAreaWithHolesValues[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, "Area3dMsr", createHolesBasicPolicyMsrParams(bProcessHoles));

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

    // retrieve associated results
    const MeasureConstPtr& pArea3dOutMsr = pOutMeasureSet->getMeasure("Area3dMsr");
    const ValueMeasureResult<ipReal64>& outResults = static_cast<const ValueMeasureResult<ipReal64>&>(pArea3dOutMsr->getMeasureResult());