[英]OpenCV 3.0 Segmentation Fault (Bag of visual words)
我正在嘗試使用openCV 3.0設置一整套視覺單詞。 我到處都看了一下,似乎只能找到僅與2.x域中的版本兼容的代碼。 到目前為止,這就是我所擁有的:
#include <opencv2/core/core.hpp>
#include "opencv2/highgui/highgui.hpp"
#include <opencv2/imgproc/imgproc.hpp>
#include <opencv2/features2d/features2d.hpp>
#include <iostream>
#include <stdio.h>
using namespace std;
using namespace cv;
int main(int argc, const char** argv) {
Ptr<FeatureDetector> features;
Ptr<DescriptorExtractor> descriptors;
Ptr<DescriptorMatcher> matcher;
int MAX_ITER = 100;
int EPS = 2;
TermCriteria tc(MAX_ITER + EPS,1,0.001);
int dictSize = 1000;
int retries = 1;
int flags = KMEANS_PP_CENTERS;
BOWKMeansTrainer bowTrainer(dictSize,tc,retries,flags);
BOWImgDescriptorExtractor bowDE(descriptors,matcher);
Mat img1 = imread("/Users/Lucas/Desktop/pic2.jpg");
Mat img2 = imread("/Users/Lucas/Desktop/2.jpg");
vector<KeyPoint> keypoints,keypoints2;
features->detect(img1, keypoints);
features->detect(img2, keypoints2);
Mat myFeatures;
Mat myFeatures2;
descriptors->compute(img1, keypoints, myFeatures);
descriptors->compute(img2, keypoints2, myFeatures2);
bowTrainer.add(myFeatures);
bowTrainer.add(myFeatures2);
Mat dictionary = bowTrainer.cluster();
bowDE.setVocabulary(dictionary);
cout << dictionary << endl;
return 0;
}
我通過使用一些教程和代碼片段將它們放在一起,但是我遇到了一個問題。 當程序進入
features->detect(img1, keypoints);
它以分段錯誤11退出,這意味着什么。 有人可以幫我指出我做錯了什么嗎?
您必須先創建 FeatureDetector,DescriptorExtractor。 atm,您有空指針實例(這就是您的段錯誤)。
#include <opencv2/xfeatures2d.hpp>
...
Ptr<FeatureDetector> features = xfeatures2d::SIFT::create();
Ptr<DescriptorExtractor> descriptors = xfeatures2d::SIFT::create();
Ptr<DescriptorMatcher> matcher = makePtr<BFMatcher>(NORM_L2);
注意,由於必須使用SIFT或SURF,因此需要為此安裝opencv_contrib存儲庫
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