标定板角点检测函数cvFindChessboardCorners怎么使用

[chenxue1111]

希望通过cvFindChessboardCorners提取标定板的角点并记录坐标。

#include <iostream>
#include "opencv2/imgproc/imgproc.hpp"
#include "opencv2/highgui/highgui.hpp"
#include "opencv2/features2d/features2d.hpp"
#include "opencv2/legacy/legacy.hpp"
using namespace std;


//by Huang, Haiqiao 25 Jun. 2011, [e-mail]
//http://www.opencv.org.cn/forum/viewtopic.php?f=1&t=14214

int main( )
{
	cout<<"Draw Chess OpenCV!"<<endl;  
	char* filename="..//Image2.tif";
	IplImage* imgRGB = cvLoadImage(filename); 
	IplImage* imgGrey = cvLoadImage(filename,CV_LOAD_IMAGE_GRAYSCALE); 

	if (imgGrey==NULL){//image validation
		cout<< "No valid image input."<<endl; 
		char c=getchar();
		return 1;
	} 

	//-------find chessboard corners--------------
	int corner_row=13;//interior number of row corners.(this can be countered by fingers.)
	int corner_col=12;//interior number of column corners.
	int corner_n=corner_row*corner_col;
	CvSize pattern_size=cvSize(corner_row,corner_col);
	CvPoint2D32f* corners=new CvPoint2D32f[corner_n];
	int corner_count;

	int found=cvFindChessboardCorners(//returning non-zero means sucess.
		imgGrey,// 8-bit single channel greyscale image.
		pattern_size,//how many INTERIOR corners in each row and column of the chessboard.
		corners,//a pointer to an array where the corner locations can be recorded.
		&corner_count,// optional, if non-NULL, its a point to an integer where the nuber of corners found can be recorded.
		CV_CALIB_CB_ADAPTIVE_THRESH|CV_CALIB_CB_FILTER_QUADS// check page 382-383.

		);
	 cout<<"corner_count = "<<corner_count;
	//-------Draw the corner pattern-------
	cvDrawChessboardCorners(
		imgRGB,
		pattern_size,
		corners,
		corner_count,
		found
		);

	//to summary a bit of findings.
	cout<<"found="<<found<<endl;
	cout<<"x="<<corners[2].x;
	cout<<",y="<<corners[2].y<<endl;

	cvNamedWindow("Find and Draw ChessBoard", 0 );
	cvShowImage( "Find and Draw ChessBoard", imgRGB );

	cvWaitKey(0); 

	cvReleaseImage(&imgGrey);
	cvReleaseImage(&imgRGB);
	cvDestroyWindow("Find and Draw ChessBoard"); 

	return 0;
}

代码来源于http://www.opencv.org.cn/forum/viewtopic.php?p=49755#p49755
可是我输出时什么都没有；这个函数具体真没用？

[chenxue1111]

这个版块这么冷清吗？

[xingma0910]

你确定你的内角点是每行13个，每列12个吗？我也遇到了你这个问题，一开始设置的内角点数太多，最后输出什么都没有。我用的棋盘是7*6的，但我一开始设置的是12*12.后来改为7*6，就有坐标输出了。

[bssltx]

楼主的代码太给力了！！

[sxjm522]

我的标定板也是13*12 但是调用这个函数后，存储角点的buf始终内容没变

[jsrg2012]

好用

[yuan874380]

haoyong

[iceshan]

同问！楼主的问题解决了吗？