Click or drag to resize
Accord.NET (logo)

FastRetinaKeypointDescriptor Class

Fast Retina Keypoint (FREAK) descriptor.
Inheritance Hierarchy

Namespace:  Accord.Imaging
Assembly:  Accord.Imaging (in Accord.Imaging.dll) Version: 3.7.0
public class FastRetinaKeypointDescriptor : ICloneable
Request Example View Source

The FastRetinaKeypointDescriptor type exposes the following members.

Public propertyExtended
Gets or sets whether to compute the standard 512-bit descriptors or extended 1024-bit
Public propertyImage
Gets the UnmanagedImage of the original source's feature detector.
Public propertyIntegral
Gets the IntegralImage of the original source's feature detector.
Public propertyIsOrientationNormal
Gets or sets whether the orientation is normalized.
Public propertyIsScaleNormal
Gets or sets whether the scale is normalized.
Public methodClone
Creates a new object that is a copy of the current instance.
Public methodCompute
Describes the specified point (i.e. computes and sets the orientation and descriptor vector fields of the FastRetinaKeypoint.
Public methodEquals
Determines whether the specified object is equal to the current object.
(Inherited from Object.)
Protected methodFinalize
Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.
(Inherited from Object.)
Public methodGetHashCode
Serves as the default hash function.
(Inherited from Object.)
Public methodGetType
Gets the Type of the current instance.
(Inherited from Object.)
Protected methodMemberwiseClone
Creates a shallow copy of the current Object.
(Inherited from Object.)
Public methodToString
Returns a string that represents the current object.
(Inherited from Object.)
Extension Methods
Public Extension MethodHasMethod
Checks whether an object implements a method with the given name.
(Defined by ExtensionMethods.)
Public Extension MethodIsEqual
Compares two objects for equality, performing an elementwise comparison if the elements are vectors or matrices.
(Defined by Matrix.)
Public Extension MethodToT
Converts an object into another type, irrespective of whether the conversion can be done at compile time or not. This can be used to convert generic types to numeric types during runtime.
(Defined by ExtensionMethods.)

Based on original implementation by A. Alahi, R. Ortiz, and P. Vandergheynst, distributed under a BSD style license.

In order to extract feature points from an image using FREAK, please take a look on the FastRetinaKeypointDetector documentation page.


  • A. Alahi, R. Ortiz, and P. Vandergheynst. FREAK: Fast Retina Keypoint. In IEEE Conference on Computer Vision and Pattern Recognition, CVPR 2012 Open Source Award Winner.

See Also