無法將兩個SIFT描述符與OpenCV匹配

Question

我試圖用兩個SIFT描述符與我能想到的最簡單的代碼匹配，但OpenCV 3一直拋出異常。

這是我的代碼：

cv::Mat img1 = imread(...); // Shortened for the example 
cv::Mat img2 = imread(...); // Shortened for the example 

std::vector<KeyPoint> keypoints1, keypoints2; 
Ptr<SIFT> ptrSift = SIFT::create(200, 3, 0.07, 15); 
Mat descriptors1, descriptors2; 
ptrSift->detectAndCompute(img1, Mat(), keypoints1, descriptors1, false); 
ptrSift->detectAndCompute(img2, Mat(), keypoints2, descriptors2, false); 

上面的代碼給我帶來了，我可以用drawKeypoints功能顯現了良好的效果。

然後我用下面的代碼相匹配的描述：

BFMatcher matcher; 
std::vector<DMatch> matches; 
matcher.match(descriptors1, descriptors2, matches); 

但它不斷拋出：

C:\builds\master_PackSlave-win32-vc12-shared\opencv\modules\features2d\src\matchers.cpp:722: error: (-215) _queryDescriptors.type() == trainDescType in function cv::BFMatcher::knnMatchImpl

OpenCV Error: Assertion failed (type == src2.type() && src1.cols == src2.cols && (type == CV_32F || type == CV_8U)) in cv::batchDistance, file C:\buil ds\master_PackSlave-win32-vc12-shared\opencv\modules\core\src\stat.cpp, line 3608 Exception: C:\builds\master_PackSlave-win32-vc12-shared\opencv\modules\core\src\stat.cpp:3608: error: (-215) type == src2.type() && src1.cols == src2. cols && (type == CV_32F || type == CV_8U) in function cv::batchDistance

感謝

Answer 1

挺有意思，下面的代碼片段對我的作品罰款：

cv::BFMatcher matcher; 
std::vector<cv::DMatch> matches; 

cv::Mat descriptors1 = cv::Mat::eye(10, 10, CV_32F); 
cv::Mat descriptors2 = cv::Mat::eye(10, 10, CV_32F); 
matcher.match(descriptors1, descriptors2, matches); 

你可以檢查嗎？你能提供描述符的大小和類型嗎？最後，你是否在釋放/調試模式下都嘗試過？

p.s .:你用什麼版本？您應該嘗試用最新版本覆蓋並重新編譯matchers.cpp：https://github.com/Itseez/opencv/commits/master/modules/features2d/src/matchers.cpp