OrientedBoundingBox2dSee full documentation

2d Oriented bounding box fitting a shape

This measure uses FeretDiameter2d to compute the oriented minimum bounding box for each shape.

The Feret diameters are calculated for a given angle and . The corners coordinates of the bounding box are then computed and the resulting oriented bounding box is selected so that its area is minimal.

Here is an example of oriented bounding box measurement, the oriented bounding boxes are displayed with dashed lines :

2d Oriented bounding box fitting a shape

Measure synthesis :

Measure Type	Measure Unit Type	Parameter Type	Result Type	Shape Requirements
Generic	None	OrientedBoundingBox2dMsrParams	Custom	Boundary Approximation

See Shape measurement for additional information on these pictograms

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, "OrientedBoundingBox2dMsr")
    
    #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("OrientedBoundingBox2dMsr")
    
    # 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, "OrientedBoundingBox2dMsr", createOrientedBoundingBox2dMsrParams(36));
    
    // compute measure on shape 2d collection
    MeasureSetPtr pOutMeasureSet = shapeAnalysis2d(pInGreyImg2d, pShape2dColl, pMeasureInfoSet);

    // retrieve associated results
    const MeasureConstPtr& pOrientedBoundingBox2dOutMsr = pOutMeasureSet->getMeasure("OrientedBoundingBox2dMsr");
    const OrientedBoundingBox2dMsrResults& outResults = static_cast<const OrientedBoundingBox2dMsrResults&>(pOrientedBoundingBox2dOutMsr->getMeasureResult());