Class AffineFeature

Namespace

OpenCvSharp

Assembly

OpenCvSharp.dll

Class implementing the AKAZE-style affine-invariant feature wrapper (ASIFT and friends). It wraps another Feature2D backend and applies it over a set of simulated affine (tilt/rotation) views of the image. See Y. Yu, J.M. Morel "ASIFT".

public class AffineFeature : Feature2D, IDisposable

Inheritance

object

CvObject

CvPtrObject

Algorithm

Feature2D

AffineFeature

Implements

IDisposable

Inherited Members

Feature2D.DescriptorSize

Feature2D.DescriptorType

Feature2D.DefaultNorm

Feature2D.Empty()

Feature2D.Detect(Mat, Mat)

Feature2D.Detect(InputArray, InputArray)

Feature2D.Detect(IEnumerable<Mat>, IEnumerable<Mat>)

Feature2D.Compute(InputArray, ref KeyPoint[], OutputArray)

Feature2D.Compute(IEnumerable<Mat>, ref KeyPoint[][], IEnumerable<Mat>)

Feature2D.DetectAndCompute(InputArray, InputArray, out KeyPoint[], OutputArray, bool)

Feature2D.Write(string)

Feature2D.Read(string)

Feature2D.GetDefaultName()

Algorithm.Write(FileStorage)

Algorithm.Read(FileNode)

Algorithm.Save(string)

CvPtrObject.RawPtr

CvObject.IsDisposed

CvObject.ptr

CvObject.SetSafeHandle(OpenCvSafeHandle)

CvObject.Dispose()

CvObject.Dispose(bool)

CvObject.DisposeManaged()

CvObject.DisposeUnmanaged()

CvObject.ThrowIfDisposed()

CvObject.CvPtr

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Methods

Create(Feature2D, int, int, float, float)

Creates an AffineFeature detector/extractor over the given backend.

public static AffineFeature Create(Feature2D backend, int maxTilt = 5, int minTilt = 0, float tiltStep = 1.4142135, float rotateStepBase = 72)

Parameters

backend Feature2D

The detector/extractor used as backend (e.g. SIFT).

maxTilt int

The highest power index of tilt factor. 5 is used in the paper as tilt sampling range n.

minTilt int

The lowest power index of tilt factor. 0 is used in the paper.

tiltStep float

Tilt sampling step in Algorithm 1 in the paper.

rotateStepBase float

Rotation sampling step factor b in Algorithm 1 in the paper.

Returns

AffineFeature

GetViewParams(out float[], out float[])

Gets the tilt and rotation view sampling parameters.

public void GetViewParams(out float[] tilts, out float[] rolls)

Parameters

tilts float[]

Output tilt sampling values.

rolls float[]

Output roll (rotation) sampling values, in degrees.

SetViewParams(float[], float[])

Sets the tilt and rotation view sampling parameters.

public void SetViewParams(float[] tilts, float[] rolls)

Parameters

tilts float[]

Tilt sampling values.

rolls float[]

Roll (rotation) sampling values, in degrees.