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我正在使用 opencv 2.4.2 库检测边缘并在图像上查找四边形形状。一切都很顺利,直到我得到这些编译错误

../src/GoodFeaturesToDetect.cpp:198:109: error: ‘cvFindContours’ was not declared in this scope
../src/GoodFeaturesToDetect.cpp:203:106: error: ‘cvContourPerimeter’ was not declared in this scope
../src/GoodFeaturesToDetect.cpp:203:114: error: ‘cvApproxPoly’ was not declared in this scope
../src/GoodFeaturesToDetect.cpp:206:64: error: ‘cvContourArea’ was not declared in this scope

这是我的标题:

#include <opencv2/core/core.hpp>
#include "opencv2/imgproc/imgproc.hpp"
#include "opencv2/highgui/highgui.hpp"
#include <stdlib.h>
#include <iostream>
#include <stdio.h>
#include <stdlib.h>

using namespace cv;
using namespace std;

void DrawLine( Mat img, Point start, Point end );
vector<Point2f> FindCornersUsingGoodFeaturesToTrack(Mat toTrack);
void ConnectPointsWithLine(Mat img,vector<Point2f> corners);
void DrawQuad(Mat img, Point a, Point b, Point c, Point d);
void DetectAndDrawQuads(Mat img);

这是调用函数的方法

void DetectAndDrawQuads(Mat img){
        CvSeq* contours;
        CvSeq* result;
        CvMemStorage *storage=cvCreateMemStorage(0);
        Mat gray;
        cvtColor(img,gray,CV_BGR2GRAY);
        cvFindContours(&gray,storage, &contours, sizeof(CvContour),CV_RETR_LIST,CV_CHAIN_APPROX_SIMPLE, Point(0,0));

        //Loop through all the contours discovered
        //Figure out which ones form a quad
        while(contours){
            result=cvApproxPoly(contours, sizeof(CvContour),storage, CV_POLY_APPROX_DP,cvContourPerimeter(contours)*0.02,0);

        if(result->total=4 && fabs(cvContourArea(result, CV_WHOLE_SEQ)) > 20){
            CvPoint *pt[4];
            for(int i=0; i<4; i++)
                pt[i]=(CvPoint*) cvGetSeqElem(result,i);

            DrawQuad(gray,*pt[0],*pt[1],*pt[2],*pt[3]); 

        }
        contours = contours->h_next;
        }

}

DetectAndDrawQuads 被 main() 调用。

这是链接的库

opencv_contrib opencv_flann opencv_legacy opencv_calib3d opencv_ml opencv_imgproc opencv_highgui opencv_objdetect opencv_core opencv_features2d

我正在研究 Eclipse CDT (Helois)

我会很感激任何提示。谢谢。

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2 回答 2

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首先,您应该使用#include <>opencv 标头(例如您的第一行,与第二行和第三行相反)。

cv以like开头的方法cvFindContours来自较旧的 opencv C 接口,并与较新的 C++ 接口分开。例如cvFindContour定义在opencv2/imgproc/imgproc_c.h而不是在opencv2/imgproc/imgproc.hpp(注意_c.h部分)。

在旁注中,您已经包含stdlib.h了两次。

于 2012-07-22T23:57:31.963 回答
0

事实证明,我调用的方法来自 openCv 2.0。我不得不将 cvFindContours 更改为 findContours(...),将 cvApproxPoly 更改为 approxPolyDP 等等,如 OpenCV 2.4.2 中所述。

于 2012-07-23T04:36:55.083 回答