DescriptorExtractor 类

最新推荐文章于 2022-06-16 15:52:19 发布

转载最新推荐文章于 2022-06-16 15:52:19 发布 · 1.8k 阅读

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本文介绍了一个基于SIFT算法的特征描述子提取类SiftDescriptorExtractor，该类继承自DescriptorExtractor并实现了特征描述子的计算方法。文章提供了类的具体实现细节及构造函数参数说明。

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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