Class MarrHildrethHash

Marr-Hildreth Operator Based Hash, slowest but more discriminative.

Inheritance
System.Object
DisposableObject
DisposableCvObject
Algorithm
ImgHashBase
MarrHildrethHash
Implements
Inherited Members
Namespace: OpenCvSharp.ImgHash
Assembly: OpenCvSharp.dll
Syntax
public class MarrHildrethHash : ImgHashBase, ICvPtrHolder

Constructors

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MarrHildrethHash(IntPtr)

Declaration
protected MarrHildrethHash(IntPtr p)
Parameters
Type Name Description
IntPtr p

Properties

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Alpha

int scale factor for marr wavelet (default=2).

Declaration
public float Alpha { get; set; }
Property Value
Type Description
System.Single
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Scale

int level of scale factor (default = 1)

Declaration
public float Scale { get; set; }
Property Value
Type Description
System.Single

Methods

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Compute(InputArray, OutputArray)

Computes average hash value of the input image

Declaration
public override void Compute(InputArray inputArr, OutputArray outputArr)
Parameters
Type Name Description
InputArray inputArr

input image want to compute hash value, type should be CV_8UC4, CV_8UC3, CV_8UC1.
OutputArray outputArr

Hash value of input, it will contain 16 hex decimal number, return type is CV_8U
Overrides
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Create(Single, Single)

Create BlockMeanHash object

Declaration
public static MarrHildrethHash Create(float alpha = 2F, float scale = 1F)
Parameters
Type Name Description
System.Single alpha

int scale factor for marr wavelet (default=2).
System.Single scale

int level of scale factor (default = 1)
Returns
Type Description
MarrHildrethHash
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DisposeManaged()

Releases managed resources

Declaration
protected override void DisposeManaged()
Overrides
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DisposeUnmanaged()

Declaration
protected override void DisposeUnmanaged()
Overrides
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Get()

Declaration
public override IntPtr Get()
Returns
Type Description
IntPtr
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SetKernelParam(Single, Single)

Declaration
public void SetKernelParam(float alpha = 2F, float scale = 1F)
Parameters
Type Name Description
System.Single alpha

int scale factor for marr wavelet (default=2).
System.Single scale

int level of scale factor (default = 1)

Implements