Non-free 2D Features Algorithms

Classes
class	cv::xfeatures2d::SIFT
	Class for extracting keypoints and computing descriptors using the Scale Invariant Feature Transform (SIFT) algorithm by D. Lowe [126] . More...
class	cv::xfeatures2d::SURF
	Class for extracting Speeded Up Robust Features from an image [12] . More...
class	cv::cuda::SURF_CUDA
	Class used for extracting Speeded Up Robust Features (SURF) from an image. : More...

Typedefs
typedef SIFT	cv::xfeatures2d::SiftDescriptorExtractor
typedef SIFT	cv::xfeatures2d::SiftFeatureDetector
typedef SURF	cv::xfeatures2d::SurfDescriptorExtractor
typedef SURF	cv::xfeatures2d::SurfFeatureDetector

Detailed Description

This section describes two popular algorithms for 2d feature detection, SIFT and SURF, that are known to be patented. You need to set the OPENCV_ENABLE_NONFREE option in cmake to use those. Use them at your own risk.

Typedef Documentation

SiftDescriptorExtractor

typedef SIFT cv::xfeatures2d::SiftDescriptorExtractor

#include <opencv2/xfeatures2d/nonfree.hpp>

SiftFeatureDetector

typedef SIFT cv::xfeatures2d::SiftFeatureDetector

#include <opencv2/xfeatures2d/nonfree.hpp>

SurfDescriptorExtractor

typedef SURF cv::xfeatures2d::SurfDescriptorExtractor

#include <opencv2/xfeatures2d/nonfree.hpp>

SurfFeatureDetector

typedef SURF cv::xfeatures2d::SurfFeatureDetector

#include <opencv2/xfeatures2d/nonfree.hpp>