SURF Class

Creates instance by raw pointer cv::SURF*

Gets or sets a memory address allocated by AllocMemory.

Gets or sets the byte length of the allocated memory

Native pointer of OpenCV structure

(Inherited from Feature2D.)

(Inherited from Feature2D.)

(Inherited from Feature2D.)

Returns true if the Algorithm is empty (e.g. in the very beginning or after unsuccessful read

false means that the basic descriptors (64 elements each) shall be computed. true means that the extended descriptors (128 elements each) shall be computed

Threshold for the keypoint detector. Only features, whose hessian is larger than hessianThreshold are retained by the detector. Therefore, the larger the value, the less keypoints you will get. A good default value could be from 300 to 500, depending from the image contrast.

Gets a value indicating whether this instance has been disposed.

Gets or sets a value indicating whether you permit disposing this instance.

The number of images within each octave of a gaussian pyramid. It is set to 2 by default.

The number of a gaussian pyramid octaves that the detector uses. It is set to 4 by default. If you want to get very large features, use the larger value. If you want just small features, decrease it.

false means that detector computes orientation of each feature. true means that the orientation is not computed (which is much, much faster). For example, if you match images from a stereo pair, or do image stitching, the matched features likely have very similar angles, and you can speed up feature extraction by setting upright=true.

Pins the object to be allocated by cvSetData.

Allocates the specified size of memory.

Compute the descriptors for a set of keypoints in an image.

Compute the descriptors for a keypoints collection detected in image collection.

The SURF constructor.

Detect keypoints in an image.

Detect keypoints in an image.

Detect keypoints in an image set.

Detects keypoints and computes the descriptors

Releases the resources

Releases managed resources

releases unmanaged resources

Return true if detector object is empty

Determines whether the specified object is equal to the current object.

Destructor

Returns the algorithm string identifier. This string is used as top level xml/yml node tag when the object is saved to a file or string.

Serves as the default hash function.

Gets the Type of the current instance.

Creates a shallow copy of the current Object.

Notifies the allocated size of memory.

Reads algorithm parameters from a file storage

Saves the algorithm to a file. In order to make this method work, the derived class must implement Algorithm::write(FileStorage fs).

If this object is disposed, then ObjectDisposedException is thrown.

Returns a string that represents the current object.

Stores algorithm parameters in a file storage

Gets or sets a handle which allocates using cvSetData.

Data pointer