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| virtual | ~Feature2D () | 
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| virtual void | compute (InputArray image, std::vector< KeyPoint > &keypoints, OutputArray descriptors) | 
|  | Computes the descriptors for a set of keypoints detected in an image (first variant) or image set (second variant). 
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| virtual void | compute (InputArrayOfArrays images, std::vector< std::vector< KeyPoint > > &keypoints, OutputArrayOfArrays descriptors) | 
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| virtual int | defaultNorm () const | 
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| virtual int | descriptorSize () const | 
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| virtual int | descriptorType () const | 
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| virtual void | detect (InputArray image, std::vector< KeyPoint > &keypoints, InputArray mask=noArray()) | 
|  | Detects keypoints in an image (first variant) or image set (second variant). 
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| virtual void | detect (InputArrayOfArrays images, std::vector< std::vector< KeyPoint > > &keypoints, InputArrayOfArrays masks=noArray()) | 
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| virtual void | detectAndCompute (InputArray image, InputArray mask, std::vector< KeyPoint > &keypoints, OutputArray descriptors, bool useProvidedKeypoints=false) | 
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| virtual bool | empty () const CV_OVERRIDE | 
|  | Return true if detector object is empty. 
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| virtual String | getDefaultName () const CV_OVERRIDE | 
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| void | read (const String &fileName) | 
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| virtual void | read (const FileNode &) CV_OVERRIDE | 
|  | Reads algorithm parameters from a file storage. 
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| void | write (const String &fileName) const | 
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| virtual void | write (FileStorage &) const CV_OVERRIDE | 
|  | Stores algorithm parameters in a file storage. 
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| void | write (const Ptr< FileStorage > &fs, const String &name=String()) const | 
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| void | writeFormat (FileStorage &fs) const | 
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Class for computing BRIEF descriptors described in. 
calon2010 .
- Parameters
- 
  
    | bytes | legth of the descriptor in bytes, valid values are: 16, 32 (default) or 64 . |  | use_orientation | sample patterns using keypoints orientation, disabled by default. |