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C++ 编译opencv代码时遇到错误_C++_Opencv - Fatal编程技术网

C++ 编译opencv代码时遇到错误

C++ 编译opencv代码时遇到错误,c++,opencv,C++,Opencv,我正在使用opencv 2.4,下面是我试图编译的代码。我使用这个命令编译代码 g++ -o "match" -ggdb `pkg-config --cflags opencv` match.cpp `pkg-config --libs opencv` 为什么我会出现此错误: match.cpp: In function ‘int main(int, const char**)’: match.cpp:18:37: error: expected type-specifier before

我正在使用opencv 2.4,下面是我试图编译的代码。我使用这个命令编译代码

g++ -o "match" -ggdb `pkg-config --cflags opencv` match.cpp `pkg-config --libs opencv` 
为什么我会出现此错误:

match.cpp: In function ‘int main(int, const char**)’:
match.cpp:18:37: error: expected type-specifier before ‘SurfFeatureDetector’
match.cpp:18:37: error: conversion from ‘int*’ to non-scalar type ‘cv::Ptr<cv::FeatureDetector>’ requested
match.cpp:18:37: error: expected ‘,’ or ‘;’ before ‘SurfFeatureDetector’
match.cpp:22:2: error: ‘SurfDescriptorExtractor’ was not declared in this scope
match.cpp:22:26: error: expected ‘;’ before ‘extractor’
match.cpp:26:2: error: ‘extractor’ was not declared in this scope
match.cpp:29:2: error: ‘BruteForceMatcher’ was not declared in this scope
match.cpp:29:30: error: expected primary-expression before ‘>’ token
match.cpp:29:32: error: ‘matcher’ was not declared in this scope
match.cpp:在函数“int main(int,const char**)”中:
match.cpp:18:37:错误:“SurfFeatureDetector”之前应为类型说明符
match.cpp:18:37:错误:请求从“int*”转换为非标量类型“cv::Ptr”
match.cpp:18:37:错误:应为“,”或“;”在“SurfFeatureDetector”之前
match.cpp:22:2:错误:“SurfDescriptorExtractor”未在此作用域中声明
match.cpp:22:26:错误:应为“;”在“提取器”之前
match.cpp:26:2:错误:“提取器”未在此作用域中声明
match.cpp:29:2:错误:未在此作用域中声明“BruteForceMatcher”
match.cpp:29:30:错误:在“>”标记之前应该有主表达式
match.cpp:29:32:错误:“matcher”未在此作用域中声明
我认为我使用的opencv版本存在一些问题,因为相同的代码在2.2版本上运行良好,但我不确定它是什么。救命

#include <opencv/cv.h>
#include <opencv/highgui.h>
#include <string.h>
#include <iostream>

using namespace std;
using namespace cv;


int main(int argc, const char* argv[])
{
    cout << argv[1] << endl << argv[2] << endl;
    Mat img1 = imread(argv[1] , CV_LOAD_IMAGE_GRAYSCALE );
    Mat img2 = imread(argv[2] , CV_LOAD_IMAGE_GRAYSCALE );

    vector<KeyPoint> keypoints1;
    vector<KeyPoint> keypoints2;
    Ptr<FeatureDetector> feature = new SurfFeatureDetector(2500);
    feature->detect(img1,keypoints1);
    feature->detect(img2,keypoints2);

    SurfDescriptorExtractor extractor;

    Mat desc1 , desc2;

    extractor.compute(img1,keypoints1,desc1);
    extractor.compute(img2,keypoints2,desc2);

    BruteForceMatcher<L2<float> > matcher;

    vector<vector<DMatch> > matches1;
    vector<vector<DMatch> > matches2;
    vector<DMatch> symMatches;
    vector<DMatch> outMatches;

    matcher.knnMatch(desc1,desc2,matches1,2);
    matcher.knnMatch(desc2,desc1,matches2,2);

    int count_inliers = 0 , count_matches = 0;

    for(vector<vector<DMatch> >::const_iterator matIt1 = matches1.begin(); matIt1 != matches1.end(); ++matIt1){
        count_matches++;
        if(matIt1->size() < 2)
            continue;
        for(vector<vector<DMatch> >::const_iterator matIt2 = matches2.begin(); matIt2 != matches2.end(); ++matIt2){
            if(matIt2->size() < 2)
                continue;
            if((*matIt1)[0].queryIdx == (*matIt2)[0].trainIdx && (*matIt2)[0].queryIdx == (*matIt1)[0].trainIdx){
                count_inliers++;
                symMatches.push_back(DMatch((*matIt1)[0].queryIdx,(*matIt1)[0].trainIdx,(*matIt1)[0].distance));
                break;
            }
        }
    }

    vector<Point2f> points1, points2;

    for(vector<DMatch>::const_iterator it = symMatches.begin(); it!=symMatches.end(); ++it){
        float x = keypoints1[it->queryIdx].pt.x;
        float y = keypoints1[it->queryIdx].pt.y;
        points1.push_back(Point2f(x,y));

        x = keypoints2[it->trainIdx].pt.x;
        y = keypoints2[it->trainIdx].pt.y;
        points2.push_back(Point2f(x,y));
    }

    vector<uchar> inliers(points1.size(),0);

    Mat fundamental;
    fundamental = findFundamentalMat(Mat(points2),Mat(points1),inliers,CV_FM_RANSAC,2,0.8);

    vector<uchar>::const_iterator itIn = inliers.begin();
    vector<DMatch>::const_iterator itM = symMatches.begin();
    for(;itIn!=inliers.end();++itIn,++itM){
        if(*itIn){
            outMatches.push_back(*itM);
        }
    }
    cout << count_inliers << endl;
    cout << count_matches << endl;
    cout << (float) count_inliers/(float) count_matches << endl;

    float diff = (float) count_inliers/(float) count_matches;
//  if(diff > 0.30){
//      cout << "Similar Images " << endl << "-----------------" << endl;
//      exit(1);
//  }

//  vector<uchar> inliers(points1.size(),0);
    Mat homography = findHomography(Mat(points2),Mat(points1),inliers,CV_RANSAC,1);

    vector<Point2f>::const_iterator itPts = points1.begin();
//  vector<uchar>::const_iterator itIn = inliers.begin();
/*  while(itPts != points1.end()){
        if(*itIn)
            circle(img1,*itPts,3,Scalar(255,255,255),2);
        ++itPts;
        ++itIn;
    }
    itPts = points2.begin();
    itIn = inliers.begin();
    while(itPts != points2.end()){
        if(*itIn)
            circle(img2,*itPts,3,Scalar(255,255,255),2);
        ++itPts;
        ++itIn;
    }
*/

    Mat result;

    warpPerspective(img2,result,homography,Size(2*img2.cols,img2.rows));
    Mat half(result,Rect(0,0,img1.cols,img1.rows));

    img1.copyTo(half);





    // Add results to image and save.
    char name[1000];

//    strcpy(name,"./surf/surf");
//    strcat(name,argv[1]);

    cv::Mat output1;
    cv::Mat output2;
    cv::drawKeypoints(img1, keypoints1, output1);
    cv::drawKeypoints(img2, keypoints2, output2);
    cv::imwrite("./surf/img11.png", img1);
    cv::imwrite("./surf/img21.png", img2);
    cv::imwrite("./surf/img31.png", result);
    cv::imwrite("./surf/tt.png", result);
    cv::imwrite("./surf/img41.png", half);
    cv::imwrite("./surf/img51.png", output1);
    cv::imwrite("./surf/img61.png", output2);

    return 0;
}
#包括
#包括
#包括
#包括
使用名称空间std;
使用名称空间cv;
int main(int argc,const char*argv[]
{
cout size()<2)
继续;
如果((*matIt1)[0]。queryIdx==(*matIt2)[0]。trainIdx&&(*matIt2)[0]。queryIdx==(*matIt1)[0]。trainIdx){
计数输入++;
symMatches.push_back(DMatch((*matIt1)[0]。queryIdx,(*matIt1)[0]。trainIdx,(*matIt1)[0]。距离));
打破
}
}
}
向量点1,点2;
对于(vector::const_迭代器it=symMatches.begin();it!=symMatches.end();++it){
float x=keypoints1[it->queryIdx].pt.x;
float y=keypoints1[it->queryIdx].pt.y;
点1.向后推(点2f(x,y));
x=keypoints2[it->trainIdx].pt.x;
y=keypoints2[it->trainIdx].pt.y;
点2.向后推(点2f(x,y));
}
向量内联(points1.size(),0);
Mat基础;
基本面=findFundamentalMat(点S2),点S1,内插线,CV_FM_RANSAC,2,0.8);
vector::const_迭代器itIn=inliers.begin();
vector::const_迭代器itM=symMatches.begin();
对于(;itIn!=inliers.end();++itIn,++itM){
如果(*itIn){
不匹配。推回(*itM);
}
}

cout看起来您需要包含SurfFeatureDetector的头文件

这是API,其中他们提到了以下内容:

#include <features2d.hpp>
# find . -name "*.h*" | xargs grep SurfFeatureDetector | grep class
# find . -name "*.h*" | xargs grep BruteForceMatcher | grep class
这将获得所有的*.h和*.hpp文件以及SurfFeatureDetector的grep,对于这些结果,将grep用于类。

读取SURF和SIFT检测器-它们已作为非免费移动

还可以作为动态库添加到链接
libopencv\u nonfree.so
libopencv\u功能2d.so


对于
BruteForceMatcher
来说,它看起来仍然是一个未解决的问题,但我非常确定它在
中。因此
我希望它们也更改了标题。如果您能找到有关BruteForceMatcher的信息,我将不胜感激。

包括以下内容

#"opencv2/features2d/features2d.hpp"
#"opencv2/highgui/highgui.hpp"
#"opencv2/core/core.hpp"
#"opencv2/legacy/legacy.hpp" (BruteForceMatcher is defined here!)
#opencv_core.so
#opencv_flann.soo (if youre using the FLANN matcher)
#opencv_highgui.so
#opencv_features2d.so
#opencv_nonfree.so
并针对以下内容进行链接

#"opencv2/features2d/features2d.hpp"
#"opencv2/highgui/highgui.hpp"
#"opencv2/core/core.hpp"
#"opencv2/legacy/legacy.hpp" (BruteForceMatcher is defined here!)
#opencv_core.so
#opencv_flann.soo (if youre using the FLANN matcher)
#opencv_highgui.so
#opencv_features2d.so
#opencv_nonfree.so

似乎对我起了作用。希望这有帮助。

现在调用
BruteForceMatcher

cv::BFMatcher

您可以这样定义匹配器:

DescriptorMatcher* hammingMatcher = new BFMatcher(NORM_HAMMING,false);
//or
DescriptorMatcher* hammingMatcher = new BFMatcher(NORM_L2,false);

编辑

在这段代码中,您还可以看到如何通过包含头来使用旧版本匹配器

#include "hammingseg.h"
其实很简单:

//matching descriptors
cv::BFMatcher matcher(cv::NORM_L2, true);
std::vector<cv::DMatch> matches;
matcher.match(descriptor1, descriptor2, matches);
//匹配描述符
cv::BFMatcher matcher(cv::NORM_L2,true);
向量匹配;
matcher.match(描述符1,描述符2,matches);
标志设置为true时,您已经得到了交叉检查。

\include
#include <opencv2/legacy/legacy.hpp>

添加这一行,它将像以前一样工作。

我包含了头文件#include,但仍然得到了相同的错误。好的,我们仔细研究一下它的定义,因为它没有找到类定义。我在/usr/include/文件夹中运行了find命令,但它没有找到任何内容。顺便说一句,我不仅缺少SurfFeatureDetector,还缺少BruteForceMatcher,我也找不到。我不知道您编写的find命令有什么问题,但当我查看/usr/include/features2d/features2d.hpp内部时,我可以看到bot类。现在我把这个文件作为头文件,但仍然得到了同样的错误。是否存在链接错误。请提供帮助。@user1054333,您仍然会遇到相同的编译错误,还是现在有所不同?正如您所说的,您需要有关BruteForceMatcher的信息,请查看。