findChessboardCorners 校准图像失败

2022-01-09 00:00:00 opencv computer-vision camera-calibration c++

我正在尝试让 OpenCV 2.4.5 识别来自我的网络摄像头的棋盘格图案.我无法让它工作，所以我决定尝试使用完美"的图像来让它工作:

I am trying to get OpenCV 2.4.5 to recognize a checkerboard pattern from my webcam. I couldn't get that working, so I decided to try to get it working just using a "perfect" image:

但它仍然无法正常工作――patternFound 每次都返回 false.有谁知道我做错了什么?

but it still won't work--patternFound returns false every time. Does anyone have any idea what I'm doing wrong?

#include <stdio.h>

#include <opencv2/core/core.hpp>
#include <opencv2/imgproc/imgproc.hpp>
#include <opencv2/calib3d/calib3d.hpp>
#include <opencv2/highgui/highgui.hpp>

using namespace cv;
using namespace std;

int main(){
    Size patternsize(8,8); //number of centers
    Mat frame = imread("perfect.png"); //source image
    vector<Point2f> centers; //this will be filled by the detected centers

    bool patternfound = findChessboardCorners(frame,patternsize,centers);

    cout<<patternfound<<endl;
    drawChessboardCorners(frame, patternsize, Mat(centers), patternfound);

    cvNamedWindow("window");
    while(1){
        imshow("window",frame);
        cvWaitKey(33);
    }
}

推荐答案

通过反复试验，我意识到patternsize应该是7x7，因为它是计算内角的.此参数必须准确--8x8 不起作用，但任何小于 7x7 的参数都不会.

Through trial and error, I realized that patternsize should be 7x7 since it is counting internal corners. This parameter has to be exact--8x8 won't work, but neither will anything less than 7x7.

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