在OpenCV中使用FeatureDetector会导致访问冲突

问题描述

我需要在立体图像中查找和匹配特征点。因此，我想比较OpenCV 2.4.5中支持的不同的Feature Detection算法。通过向函数传递SURF，SIFT等。

代码片段：

  #includeopencv2 / opencv。 hpp
 #include< opencv / highgui.h> 
 #include< opencv2 / nonfree / features2d.hpp> 
 
 using namespace cv; 
 using namespace std; 
 
 ... 
 
 void DisparityAnalysis :: detectKeyPoints（Mat1b leftImageGrey，Mat1b rightImageGrey，string algorithmName）
 {
 Ptr< FeatureDetector> detector = FeatureDetector :: create（algorithmName）; 
 detect-> detect（leftImageGrey，keypoints_1）; 
 detect-> detect（rightImageGrey，keypoints_2）; 
} 
  

错误：

  DisparisAnalysis.exe中0x770b15de处的未处理异常：0xC0000005：访问冲突读取位置0x00000000。 
  

我已经搜索过解决方案，发现这个：我认识到的差别是，他们在开头使用cv :: initModule_nonfree（）。但是，当它复制到我的代码，它不编译，因为未找到标识符。
对于SIFT和SURF，任何建议？

解决方案

，你需要nonfree模块， p>

• 包含opencv2 / nonfree / nonfree.hpp




• 开始时调用cv :: initModule_nonfree（）




• 链接到opencv_nonfree2.4.x.lib

I need to find and match feature points in stereo images. Therefore I want to compare the different Feature Detection algorithms that are supported in OpenCV 2.4.5. by passing "SURF", "SIFT", etc. to the function.

The code snippet:

#include "opencv2/opencv.hpp"
#include <opencv/highgui.h>
#include <opencv2/nonfree/features2d.hpp>

using namespace cv;
using namespace std;

...

void DisparityAnalysis::detectKeyPoints(Mat1b leftImageGrey, Mat1b rightImageGrey, string algorithmName)
{
    Ptr<FeatureDetector> detector = FeatureDetector::create(algorithmName);
    detector->detect(leftImageGrey, keypoints_1);
    detector->detect(rightImageGrey, keypoints_2);
}

The error:

Unhandled exception at 0x770b15de in DisparityAnalysis.exe: 0xC0000005: Access violation reading location 0x00000000.

I've already searched for solutions and found this one: Access violation reading in FeatureDetector OpenCV 2.4.5 The difference I've recognized is, that they use cv::initModule_nonfree() at the beginning. But when copying it into my code it doesn't compile because the identifier isn't found.Any suggestions?

解决方案

for SIFT and SURF, you'll need the nonfree module, that is :

• include "opencv2/nonfree/nonfree.hpp"

• call cv::initModule_nonfree() at the beginning

• link against opencv_nonfree2.4.x.lib

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