OpenCV：爲什麼SIFT和SURF探測器崩潰？

Question

爲什麼SIFT和SURF探測器會墜毀？

using namespace std; 
using namespace cv; 

int main(int argc, char *argv[]) 
{   
    Mat image = imread("TestImage.jpg"); 

    // Create smart pointer for SIFT feature detector. 
    Ptr<FeatureDetector> featureDetector = FeatureDetector::create("SIFT"); 
    vector<KeyPoint> keypoints; 

    // Detect the keypoints 
    featureDetector->detect(image, keypoints); // here crash 
    // ... 
} 

錯誤是Segmentation fault (core dumped)。我使用OpenCV 2.4.8，gcc 4.9和Ubuntu。如果我使用其他類型的功能它正常運行。我錯過了什麼？

Answer 1

您是否嘗試致電initModule_nonfree()？

#include <opencv2/nonfree/nonfree.hpp> 
using namespace std; 
using namespace cv; 

int main(int argc, char *argv[]) 
{ 
    initModule_nonfree(); 
    Mat image = imread("TestImage.jpg"); 

    // Create smart pointer for SIFT feature detector. 
    Ptr<FeatureDetector> featureDetector = FeatureDetector::create("SIFT"); 
    vector<KeyPoint> keypoints; 

    // Detect the keypoints 
    featureDetector->detect(image, keypoints); // here crash 
    // ... 
} 

此外，你沒有檢查指針featureDetector可能爲null（因爲你還沒有調用initModule）。