FirstPixel3d

Measure allowing to get the first voxel for 3d shape. More...

Classes
class	ipsdk::imaproc::shape::analysis::FirstPixel3dMsr
	Measurement object for measure FirstPixel3d. More...
class	ipsdk::imaproc::shape::analysis::FirstPixel3dMsrInfo
	Information object for measure FirstPixel3d. More...
class	ipsdk::imaproc::shape::analysis::FirstPixel3dMsrResults
	Measurement results object for measure FirstPixel3d. More...

Detailed Description

Measure allowing to get the first voxel for 3d shape.

This measure gets the coordinates (x,y,z) of the first voxel found for each shape.

Here is an example of first voxel measurement in 3d case :

Author

A. Eymar

Date

2022/01/31

Copyright

2022 Reactiv'IP, all right reserved.

Get the first voxel for each 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 FirstPixel3d is not associated to any unit [ipsdk::shape::analysis::eMsrUnitFormat::eMUF_NoUnit]

Measure Parameter Type :

Measure FirstPixel3d has no parameters

Measure Result Type :

Measure FirstPixel3d is associated to FirstPixel3dMsrResults results

Measure Shape Requirements :

Measure FirstPixel3d requires row intersections from shape data

Measure Dependencies :

Measure FirstPixel3d 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, "FirstPixel3dMsr")
    
    #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("FirstPixel3dMsr")
    
    # 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(readFromXmlFile(inputShape3dCollPath, *pShape3dColl) == true);

    // define a measure info set
    MeasureInfoSetPtr pMeasureInfoSet = MeasureInfoSet::create3dInstance();
    createMeasureInfo(pMeasureInfoSet, "FirstPixel3dMsr");
    
    // compute measure on shape 3d collection
    MeasureSetPtr pOutMeasureSet = shapeAnalysis3d(pInGreyImg3d, pShape3dColl, pMeasureInfoSet);

    // retrieve associated results
    const MeasureConstPtr& pFirstPixel3dOutMsr = pOutMeasureSet->getMeasure("FirstPixel3dMsr");
    const FirstPixel3dMsrResults& outResults = static_cast<const FirstPixel3dMsrResults&>(pFirstPixel3dOutMsr->getMeasureResult());