RelativeSize

Measure allowing to get the number of shapes equivalent to the shape with minimum area. More...

Classes
class	ipsdk::imaproc::shape::analysis::RelativeSizeMsr
	Measurement object for measure RelativeSize. More...
class	ipsdk::imaproc::shape::analysis::RelativeSizeMsrInfo
	Information object for measure RelativeSize. More...
class	ipsdk::imaproc::shape::analysis::RelativeSizeMsrParams
	Parameter object for measure RelativeSize. More...

Functions
IPSDKIPLSHAPEANALYSIS_API RelativeSizeMsrParamsPtr	ipsdk::imaproc::shape::analysis::createRelativeSizeMsrParams (const eRelativeSizePolicy &relativeSizePolicy)
	function allowing to create a new parameter object for RelativeSize measure
IPSDKIPLSHAPEANALYSIS_API RelativeSizeMsrParamsPtr	ipsdk::imaproc::shape::analysis::createRelativeSizeMsrParams (ipsdk::ipBool bProcessHoles, const eRelativeSizePolicy &relativeSizePolicy)
	[Deprecated] function allowing to create a new parameter object for RelativeSize measure bProcessHoles is ignored

Detailed Description

Measure allowing to get the number of shapes equivalent to the shape with minimum area.

RelativeSize measure computes the number of shapes with the minimum area contained in each shape of the image. For a given 2d shape , the relative size is computed as follows :

Where is the shapes collection and computes the area of the 2d shape .

The 3d relative size is computed with :

Where computes the volume of the 3d shape .

The following figure illustrates the result of this measure on a simple example :

Here is an example of relative size measurement :

Author

R. Abbal

Date

2015/07/22

Copyright

2015 Reactiv'IP, all right reserved.

Measure allowing to get the number of shapes equivalent to the shape with minimum area

Measure synthesis :

Measure Type	Measure Unit Type	Parameter Type	Result Type	Shape Requirements
Generic	None	RelativeSizeMsrParams	Value (ipsdk::ipReal64)	Row Intersections

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 be used in 2d and 3d case

Measure Unit Type:

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

Measure Parameter Type :

Measure RelativeSize is associated to RelativeSizeMsrParams parameters

Measure Result Type :

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

Measure Shape Requirements :

Measure RelativeSize requires row intersections from shape data

Measure Dependencies :

Measure RelativeSize depends on following measures :

Measure Mode	Measure Name	Measure Type	Measure Parameters
eMVP_2d	Volume	Area2d
eMVP_3d	Volume	Volume3d

Note

See Shape Analysis 2d for more information on general shape 2d analysis and measurement usage.

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

Example of Python code :

Generic example in 2d case :

import PyIPSDK
import PyIPSDK.IPSDKIPLShapeAnalysis as shapeanalysis

    # Create the infoset
    inMeasureInfoSet2d = PyIPSDK.createMeasureInfoSet2d()
    PyIPSDK.createMeasureInfo(inMeasureInfoSet2d, "RelativeSizeMsr")
    
    #Perform the analysis
    outMeasureSet = shapeanalysis.labelAnalysis2d(inGreyImg, inLabelImg2d, inMeasureInfoSet2d)
    
    # save results to csv format
    PyIPSDK.saveCsvMeasureFile(os.path.join(tmpPath,  "shape_analysis_results.csv"), outMeasureSet)
    
    # retrieve measure results
    outMsr = outMeasureSet.getMeasure("RelativeSizeMsr")
    
    # retrieve measure values
    outMsrValues = outMsr.getMeasureResult().getColl(0)
    print("First label measurement equal " + str(outMsrValues[1]))

Generic example in 3d case :

import PyIPSDK
import PyIPSDK.IPSDKIPLShapeAnalysis as shapeanalysis

    # Create the infoset
    inMeasureInfoSet3d = PyIPSDK.createMeasureInfoSet3d()
    PyIPSDK.createMeasureInfo(inMeasureInfoSet3d, "RelativeSizeMsr")
    
    #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("RelativeSizeMsr")
    
    # 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 pInGreyImg2d = loadTiffImageFile(inputGreyImgPath);

    // read entity shape 2d collection used for processing
    Shape2dCollPtr pShape2dColl = boost::make_shared<Shape2dColl>();
    readFromXmlFile(inputShape2dCollPath, *pShape2dColl);

    // define a measure info set
    MeasureInfoSetPtr pMeasureInfoSet = MeasureInfoSet::create2dInstance();
    createMeasureInfo(pMeasureInfoSet, "RelativeSizeMsr", createRelativeSizeMsrParams(bProcessHoles, eRelativeSizePolicy::eRSP_Min));
    
    // compute measure on shape 2d collection
    MeasureSetPtr pOutMeasureSet = shapeAnalysis2d(pInGreyImg2d, pShape2dColl, pMeasureInfoSet);

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