Solution for OpenCV Error: Unsupported format or combination of format - when matching ORB features with FlannBasedMatcher

Question

我尝试使用 ORB.My 代码找到好的匹配项如下：

Ptr<FeatureDetector> detector = ORB::create();
Mat descriptors_img1, descriptors_img2;


//-- Step 2: Calculate descriptors (feature vectors)
detector->detect(img1, kp1,descriptors_img1);
detector->detect(img2, kp2,descriptors_img2);


Ptr<DescriptorExtractor> extractor = ORB::create();
extractor->compute(img1, kp1, descriptors_img1 );
extractor->compute(img2, kp2, descriptors_img2 );
//-- Step 3: Matching descriptor vectors using FLANN matcher
descriptors_img1.convertTo(descriptors_img1, CV_32F);
descriptors_img2.convertTo(descriptors_img2, CV_32F);
FlannBasedMatcher matcher;
std::vector<DMatch> matches;
matcher.match(descriptors_img1,descriptors_img2,matches);
double max_dist = 0; double min_dist = 100;

//-- Quick calculation of max and min distances between keypoints
for( int i = 0; i < descriptors_img1.rows; i++ )
{
    double dist = matches[i].distance;
    if( dist < min_dist )
        min_dist = dist;
    if( dist > max_dist )
        max_dist = dist;
}

printf("-- Max dist : %f \n", max_dist );
printf("-- Min dist : %f \n", min_dist );

//-- Draw only "good" matches (i.e. whose distance is less than 3*min_dist )
std::vector< DMatch > good_matches;

for( int i = 0; i < descriptors_img1.rows; i++ )
{
    if( matches[i].distance < 3*min_dist )
    {
        good_matches.push_back( matches[i]);
    }
}

Mat img_matches;
drawMatches(img1,kp1,img2,kp2,good_matches,img_matches,Scalar::all(-1),
        Scalar::all(-1),vector<char>(),DrawMatchesFlags::NOT_DRAW_SINGLE_POINTS );
//-- Show detected matches
imshow( "Good Matches", img_matches );

但是当我运行它时，我收到错误消息：

OpenCV Error: Unsupported format or combination of formats (type=0 ) in buildIndex_, file /home/opencv-3.2.0/modules/flann/src/miniflann.cpp, line 315 terminate called after throwing an instance of 'cv::Exception' what(): /home/opencv-3.2.0/modules/flann/src/miniflann.cpp:315: error: (-210) type=0 in function buildIndex_

我看了类似的问题，但我没有找到我的 answer.After 调试我才知道错误在

matcher.match(....);

请帮我提前解决这个问题out.Thanks

Answer 1

我解决了这个错误。你只要修改代码

Ptr<ORB> detector = ORB::create()

而不是

Ptr<FeatureDetector> detector = ORB::create();

然后它对我有用。

Solution for OpenCV Error: Unsupported format or combination of format - when matching ORB features with FlannBasedMatcher

Solution for OpenCV Error: Unsupported format or combination of format - when matching ORB features with FlannBasedMatcher

c++

orb

opencv3.0