OBBLength

Measure allowing to get the length of the minimal oriented bounding box of a shape. More...

Classes
class	ipsdk::imaproc::shape::analysis::OBBLengthMsr
	Measurement object for measure OBBLength. More...
class	ipsdk::imaproc::shape::analysis::OBBLengthMsrInfo
	Information object for measure OBBLength. More...
class	ipsdk::imaproc::shape::analysis::OBBLengthMsrParams
	Parameter object for measure OBBLength. More...

Functions
IPSDKIPLSHAPEANALYSIS_API OBBLengthMsrParamsPtr	ipsdk::imaproc::shape::analysis::createOBBLengthMsrParams (ipUInt32 nbOrientations=36)
	function allowing to create a new parameter object for OBBLength measure

Detailed Description

Measure allowing to get the length of the minimal oriented bounding box of a shape.

This measure computes the length of the oriented minimal bounding box for each shape.

Here is an example of length oriented bounding box measurement :

See OrientedBoundingBox2d and OrientedBoundingBox3d for more details about the oriented bounding box calculation.

Author

R. Abbal

Date

2015/07/24

Copyright

2015 Reactiv'IP, all right reserved.

Measure allowing to get the length of the minimal oriented bounding box of a shape

Measure synthesis :

Measure Type	Measure Unit Type	Parameter Type	Result Type	Shape Requirements
Generic	Length	OBBLengthMsrParams	Value (ipsdk::ipReal64)	Both

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 OBBLength is associated to a length measurement unit [ipsdk::shape::analysis::eMsrUnitFormat::eMUF_LengthUnit]

Measure Parameter Type :

Measure OBBLength is associated to OBBLengthMsrParams parameters

Measure Result Type :

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

Measure Shape Requirements :

Measure OBBLength requires row intersections and boundary approximation from shape data

Measure Dependencies :

Measure OBBLength depends on following measures :

Measure Mode	Measure Name	Measure Type	Measure Parameters
eMVP_2d	OrientedBoundingBox	OrientedBoundingBox2d	createOrientedBoundingBox2dMsrParams(_pMsrParams->getValue<OBBLengthMsrParams::NbOrientations>())
eMVP_3d	OrientedBoundingBox	OrientedBoundingBox3d	createOrientedBoundingBox3dMsrParams(_pMsrParams->getValue<OBBLengthMsrParams::NbOrientations>())

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

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