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[英]SURF Feature extraction and Keypoint match based on FlannBasedMatcher
[英]Surf feature Extraction
目標:通過使用Surf descriptors
和opencv 2.4.9
庫來匹配blob。
算法:基於以下鏈接: 步驟
#include <stdio.h>
#include <iostream>
#include "opencv2/core/core.hpp"
#include "opencv2/features2d/features2d.hpp"
#include "opencv2/nonfree/features2d.hpp"
#include "opencv2/highgui/highgui.hpp"
#include "opencv2/nonfree/nonfree.hpp"
using namespace cv;
void readme();
/** @function main */
int main( int argc, char** argv )
{
if( argc != 3 )
{ readme(); return -1; }
Mat img_1 = imread( argv[1], CV_LOAD_IMAGE_GRAYSCALE );
Mat img_2 = imread( argv[2], CV_LOAD_IMAGE_GRAYSCALE );
if( !img_1.data || !img_2.data )
{ std::cout<< " --(!) Error reading images " << std::endl; return -1; }
//-- Step 1: Detect the keypoints using SURF Detector
int minHessian = 400;
SurfFeatureDetector detector( minHessian );
std::vector<KeyPoint> keypoints_1, keypoints_2;
detector.detect( img_1, keypoints_1 );
detector.detect( img_2, keypoints_2 );
//-- Draw keypoints
Mat img_keypoints_1; Mat img_keypoints_2;
drawKeypoints( img_1, keypoints_1, img_keypoints_1, Scalar::all(-1), DrawMatchesFlags::DEFAULT );
drawKeypoints( img_2, keypoints_2, img_keypoints_2, Scalar::all(-1), DrawMatchesFlags::DEFAULT );
//-- Show detected (drawn) keypoints
imshow("Keypoints 1", img_keypoints_1 );
imshow("Keypoints 2", img_keypoints_2 );
waitKey(0);
return 0;
}
/** @function readme */
void readme()
{ std::cout << " Usage: ./SURF_detector <img1> <img2>" << std::endl; }
關鍵點檢測的結果:在下圖中,關鍵點的數量非常多,但並不重要。 如何選擇最能描述斑點的最佳關鍵點子集。 除了沖浪,還有其他更好的方法嗎? 這些Blob是二進制的
較高的minHessian
將產生較少的KeyPoint。
很難從圖像中分辨出您要匹配的兩個輸入圖像是什么,以及您的目標到底是什么(將“ Vos ..”的“ Vo”與“ Votre ...”的“ Vo”匹配將是成功的)還是失敗?
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