Finds robust features in the image (basic descriptor is returned in this case). For each feature it returns its location, size, orientation and optionally the descriptor, basic or extended. The function can be used for object tracking and localization, image stitching etc

Namespace: Emgu.CV
Assembly: Emgu.CV (in Emgu.CV.dll) Version: (


public SURFFeature[] ExtractSURF(
	Image<Gray, byte> mask,
	ref MCvSURFParams param
Visual Basic
Public Function ExtractSURF ( _
	mask As Image(Of Gray, Byte), _
	ByRef param As MCvSURFParams _
) As SURFFeature()
Visual C++
array<SURFFeature^>^ ExtractSURF(
	Image<Gray, unsigned char>^ mask, 
	MCvSURFParams% param


Type: Emgu.CV..::..Image<(Of <(<'Gray, Byte>)>)>
The optional input 8-bit mask, can be null if not needed. The features are only found in the areas that contain more than 50% of non-zero mask pixels
Type: Emgu.CV.Structure..::..MCvSURFParams%
The SURF parameters

Return Value

The SURF features

See Also