public static void ExtractSURF(
	CvArr image,
	CvArr mask,
	ref CvSURFPoint[] keypoints,
	out float[][] descriptors,
	CvSURFParams param,
	bool useProvidedKeyPts
)

Public Shared Sub ExtractSURF ( 
	image As CvArr,
	mask As CvArr,
	ByRef keypoints As CvSURFPoint(),
	<OutAttribute> ByRef descriptors As Single()(),
	param As CvSURFParams,
	useProvidedKeyPts As Boolean
)

public:
static void ExtractSURF(
	CvArr^ image, 
	CvArr^ mask, 
	array<CvSURFPoint>^% keypoints, 
	[OutAttribute] array<array<float>^>^% descriptors, 
	CvSURFParams^ param, 
	bool useProvidedKeyPts
)

static member ExtractSURF : 
        image : CvArr * 
        mask : CvArr * 
        keypoints : CvSURFPoint[] byref * 
        descriptors : float32[][] byref * 
        param : CvSURFParams * 
        useProvidedKeyPts : bool -> unit 

Parameters

image

Type: OpenCvSharpCvArr
The input 8-bit grayscale image.

mask

Type: OpenCvSharpCvArr
The optional input 8-bit mask. The features are only found in the areas that contain more than 50% of non-zero mask pixels.

keypoints

Type: OpenCvSharpCvSURFPoint
The output parameter; double pointer to the sequence of keypoints. This will be the sequence of CvSURFPoint structures.

descriptors

Type: SystemSingle
The optional output parameter; double pointer to the sequence of descriptors; Depending on the params.extended value, each element of the sequence will be either 64-element or 128-element floating-point (CV_32F) vector. If the parameter is null, the descriptors are not computed.

param

Type: OpenCvSharpCvSURFParams
Various algorithm parameters put to the structure CvSURFParams

useProvidedKeyPts

Type: SystemBoolean
If useProvidedKeyPts!=0, keypoints are not detected, but descriptors are computed at the locations provided in keypoints (a CvSeq of CvSURFPoint).

Reference