这是 cv::xfeatures2d::PCTSignaturesSQFD 的完整成员列表，包括所有继承的成员。

Algorithm()	cv::Algorithm
clear()	cv::Algorithm	内联虚函数
computeQuadraticFormDistance(InputArray _signature0, InputArray _signature1) const =0	cv::xfeatures2d::PCTSignaturesSQFD	纯虚函数
computeQuadraticFormDistances(const Mat &sourceSignature, const std::vector< Mat > &imageSignatures, std::vector< float > &distances) const =0	cv::xfeatures2d::PCTSignaturesSQFD	纯虚函数
create(const int distanceFunction=3, const int similarityFunction=2, const float similarityParameter=1.0f)	cv::xfeatures2d::PCTSignaturesSQFD	static
empty() const	cv::Algorithm	内联虚函数
getDefaultName() const	cv::Algorithm	virtual
load(const String &filename, const String &objname=String())	cv::Algorithm	内联静态
loadFromString(const String &strModel, const String &objname=String())	cv::Algorithm	内联静态
read(const FileNode &fn)	cv::Algorithm	内联虚函数
read(const FileNode &fn)	cv::Algorithm	内联静态
save(const String &filename) const	cv::Algorithm	virtual
write(FileStorage &fs) const	cv::Algorithm	内联虚函数
write(FileStorage &fs, const String &name) const	cv::Algorithm
write(const Ptr< FileStorage > &fs, const String &name=String()) const	cv::Algorithm
writeFormat(FileStorage &fs) const	cv::Algorithm	保护
~Algorithm()	cv::Algorithm	virtual