OrientedBoundingBox3d

3d Oriented bounding box fitting a shape More...

Classes
class	ipsdk::imaproc::shape::analysis::OrientedBoundingBox3dMsr
	Measurement object for measure OrientedBoundingBox3d. More...
class	ipsdk::imaproc::shape::analysis::OrientedBoundingBox3dMsrInfo
	Information object for measure OrientedBoundingBox3d. More...
class	ipsdk::imaproc::shape::analysis::OrientedBoundingBox3dMsrParams
	Parameter object for measure OrientedBoundingBox3d. More...
class	ipsdk::imaproc::shape::analysis::OrientedBoundingBox3dMsrResults
	Measurement results object for measure OrientedBoundingBox3d. More...

Functions
IPSDKIPLSHAPEANALYSIS_API OrientedBoundingBox3dMsrParamsPtr	ipsdk::imaproc::shape::analysis::createOrientedBoundingBox3dMsrParams (ipUInt32 nbOrientations)
	function allowing to create a new parameter object for OrientedBoundingBox3d measure

Detailed Description

3d Oriented bounding box fitting a shape

This measure uses FeretDiameter3d to compute the oriented minimum bounding box for each shape.

This measure computes, for each shape, an approximation of the oriented bounding box as follows: for each shape, bounding boxes are computed on a customizable number of uniformly distributed orientations. The one with the minimal volume is then considered as the oriented bounding box of the shape.

Here is an example of oriented bounding box measurement calculated on the shapes extracted from the 3d test image MorphoBin3d6.tif. The oriented bounding boxes are displayed with black lines :

Author

H. Delestre

Date

2016/05/09

Copyright

2016 Reactiv'IP, all right reserved.

3d Oriented bounding box fitting a shape

Measure synthesis :

Measure Type	Measure Unit Type	Parameter Type	Result Type	Shape Requirements
Geometry 3d	None	OrientedBoundingBox3dMsrParams	Custom	Both

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 OrientedBoundingBox3d is not associated to any unit [ipsdk::shape::analysis::eMsrUnitFormat::eMUF_NoUnit]

Measure Parameter Type :

Measure OrientedBoundingBox3d is associated to OrientedBoundingBox3dMsrParams parameters

Measure Result Type :

Measure OrientedBoundingBox3d is associated to OrientedBoundingBox3dMsrResults results

Measure Shape Requirements :

Measure OrientedBoundingBox3d requires row intersections and boundary approximation from shape data

Measure Dependencies :

Measure OrientedBoundingBox3d depends on following measures :

Measure Mode	Measure Name	Measure Type	Measure Parameters
eMVP_3d	ConvexHull	ConvexHull3d
eMVP_3d	Inertia	Inertia3d

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, "OrientedBoundingBox3dMsr")
    
    #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("OrientedBoundingBox3dMsr")
    
    # retrieve measure values
    outMsrValues = outMsr.getMeasureResult().getColl(0)
    print("First label estimation major radius : " + str(outMsrValues[1].getLength()))
    print("First label estimation medium radius : " + str(outMsrValues[1].getWidth()))
    print("First label estimation minor radius : " + str(outMsrValues[1].getHeight()))
    print("First label estimation alpha : " + str(outMsrValues[1].getAlpha()))
    print("First label estimation beta : " + str(outMsrValues[1].getBeta()))
    print("First label estimation chi : " + str(outMsrValues[1].getChi()))

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, "OrientedBoundingBox3dMsr", createOrientedBoundingBox3dMsrParams(36));
    
    // compute measure on shape 3d collection
    MeasureSetPtr pOutMeasureSet = shapeAnalysis3d(pInGreyImg3d, pShape3dColl, pMeasureInfoSet);

    // retrieve associated results
    const MeasureConstPtr& pOrientedBoundingBox3dOutMsr = pOutMeasureSet->getMeasure("OrientedBoundingBox3dMsr");
    const OrientedBoundingBox3dMsrResults& outResults = static_cast<const OrientedBoundingBox3dMsrResults&>(pOrientedBoundingBox3dOutMsr->getMeasureResult());