Class HistogramPhaseUnwrapping

Namespace

Emgu.CV.PhaseUnwrapping

Assembly

Emgu.CV.dll

Class implementing two-dimensional phase unwrapping.

public class HistogramPhaseUnwrapping : UnmanagedObject, IDisposable

Inheritance

object

DisposableObject

UnmanagedObject

HistogramPhaseUnwrapping

Implements

IDisposable

Inherited Members

UnmanagedObject._ptr

UnmanagedObject.Ptr

DisposableObject.Dispose()

DisposableObject.ReleaseManagedResources()

object.GetType()

object.MemberwiseClone()

object.ToString()

object.Equals(object)

object.Equals(object, object)

object.ReferenceEquals(object, object)

object.GetHashCode()

Remarks

This algorithm belongs to the quality-guided phase unwrapping methods. First, it computes a reliability map from second differences between a pixel and its eight neighbours. Reliability values lie between 0 and 16pipi. Then, this reliability map is used to compute the reliabilities of "edges". An edge is an entity defined by two pixels that are connected horizontally or vertically. Its reliability is found by adding the reliabilities of the two pixels connected through it. Edges are sorted in a histogram based on their reliability values. This histogram is then used to unwrap pixels, starting from the highest quality pixel.

Constructors

HistogramPhaseUnwrapping(int, int, float, int, int)

Create a HistogramPhaseUnwrapping instance

public HistogramPhaseUnwrapping(int width = 800, int height = 600, float histThresh = 29.608812, int nbrOfSmallBins = 10, int nbrOfLargeBins = 5)

Parameters

width int

Phase map width.

height int

Phase map height.

histThresh float

Bins in the histogram are not of equal size. Default value is 3pipi. The one before "histThresh" value are smaller.

nbrOfSmallBins int

Number of bins between 0 and "histThresh". Default value is 10.

nbrOfLargeBins int

Number of bins between "histThresh" and 32pipi (highest edge reliability value). Default value is 5.

Methods

DisposeObject()

Release the unmanaged resources associated with the HistogramPhaseUnwrapping

protected override void DisposeObject()

GetInverseReliabilityMap(IOutputArray)

Get the reliability map computed from the wrapped phase map.

public void GetInverseReliabilityMap(IOutputArray reliabilityMap)

Parameters

reliabilityMap IOutputArray

Image where the reliability map is stored.

UnwrapPhaseMap(IInputArray, IOutputArray, IInputArray)

Unwraps a 2D phase map.

public void UnwrapPhaseMap(IInputArray wrappedPhaseMap, IOutputArray unwrappedPhaseMap, IInputArray shadowMask = null)

Parameters

wrappedPhaseMap IInputArray

The wrapped phase map that needs to be unwrapped.

unwrappedPhaseMap IOutputArray

The unwrapped phase map.

shadowMask IInputArray

Optional parameter used when some pixels do not hold any phase information in the wrapped phase map.