class CV_EXPORTS DescriptorExtractor
{
public:
virtual ~DescriptorExtractor();
void compute( const Mat& image, vector<KeyPoint>& keypoints,
Mat& descriptors ) const;
void compute( const vector<Mat>& images, vector<vector<KeyPoint> >& keypoints,
vector<Mat>& descriptors ) const;
virtual void read( const FileNode& );
virtual void write( FileStorage& ) const;
virtual int descriptorSize() const = 0;
virtual int descriptorType() const = 0;
static Ptr<DescriptorExtractor> create( const string& descriptorExtractorType );
protected:
...
};
// SIFT 来封装的用于计算特征描述子的类
class SiftDescriptorExtractor : public DescriptorExtractor
{
public:
SiftDescriptorExtractor(
const SIFT::DescriptorParams& descriptorParams=SIFT::DescriptorParams(),
const SIFT::CommonParams& commonParams=SIFT::CommonParams() );
SiftDescriptorExtractor( double magnification, bool isNormalize=true,
bool recalculateAngles=true, int nOctaves=SIFT::CommonParams::DEFAULT_NOCTAVES,
int nOctaveLayers=SIFT::CommonParams::DEFAULT_NOCTAVE_LAYERS,
int firstOctave=SIFT::CommonParams::DEFAULT_FIRST_OCTAVE,
int angleMode=SIFT::CommonParams::FIRST_ANGLE );
virtual void read (const FileNode &fn);
virtual void write (FileStorage &fs) const;
virtual int descriptorSize() const;
virtual int descriptorType() const;
protected:
...
}
转载:http://blog.youkuaiyun.com/zhuwei1988