Opencv功能匹配在iPhone上打破，但在模拟器上没有

Question

我有一个运行在.mm文件中的Opencv C ++代码，它有一个可以在iPhone上运行的桥接器。在模拟器中，它工作正常，没有问题。在iPhone上运行时，它会中断。这是代码

 int minHessian = 400;
Ptr<cv::xfeatures2d::SURF> detector = cv::xfeatures2d::SURF::create( minHessian );
std::vector<KeyPoint> keypoints1, keypoints2;
Mat descriptors1, descriptors2;
detector->detectAndCompute( img1, noArray(), keypoints1, descriptors1 );
detector->detectAndCompute( img2, noArray(), keypoints2, descriptors2 );
//-- Step 2: Matching descriptor vectors with a FLANN based matcher
// Since SURF is a floating-point descriptor NORM_L2 is used
Ptr<DescriptorMatcher> matcher = DescriptorMatcher::create(DescriptorMatcher::FLANNBASED);
std::vector< std::vector<DMatch> > knn_matches;
matcher->knnMatch( descriptors1, descriptors2, knn_matches, 2 );
//-- Filter matches using the Lowe's ratio test
const float ratio_thresh = 0.8f;
std::vector<DMatch> good_matches;
for (size_t i = 0; i < knn_matches.size(); i++)
{
    if (knn_matches[i][0].distance < ratio_thresh * knn_matches[i][1].distance)
    {
        good_matches.push_back(knn_matches[i][0]);
    }
}

它明确打破了这条线

matcher->knnMatch( descriptors1, descriptors2, knn_matches, 2 );

错误日志将此指定为错误

libc++abi.dylib: terminating with uncaught exception of type cvflann::anyimpl::bad_any_cast

Answer 1

您必须删除#import opencv2/opencv.hpp并添加所需的特定模块。在我的情况下，我需要这些文件

#import <opencv2/imgcodecs.hpp>
#import <opencv2/calib3d.hpp>
#import <opencv2/features2d.hpp>
#import <opencv2/xfeatures2d.hpp>
#import <opencv2/imgproc/imgproc.hpp>