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#include <cv.h> #include <highgui.h> #include <stdio.h>   #define CHESSBOARD_WIDTH 9 #define CHESSBOARD_HEIGHT 6 #define COUNT_OF_CORNERS (CHESSBOARD_WIDTH*CHESSBOARD_HEIGHT)     void findChessBoardCalibrationObject(IplImage* chessBoardImage); int main(void) {         IplImage* chessBoardImage=cvLoadImage("right04.jpg");           findChessBoardCalibrationObject(chessBoardImage);           cvReleaseImage(&chessBoardImage); }   void findChessBoardCalibrationObject(IplImage* chessBoardImage) {                 CvPoint2D32f corners[COUNT_OF_CORNERS];         int corner_count;         int pattern_was_found;           pattern_was_found=cvFindChessboardCorners(chessBoardImage, cvSize(CHESSBOARD_WIDTH, CHESSBOARD_HEIGHT),                corners, &corner_count, CV_CALIB_CB_ADAPTIVE_THRESH);           printf("corner_count : %d\n", corner_count);           for(int i=0; i<COUNT_OF_CORNERS; i++) {                printf("x : %f, y : %f\n", corners[i].x, corners[i].y);         }           cvDrawChessboardCorners(chessBoardImage, cvSize(CHESSBOARD_WIDTH, CHESSBOARD_HEIGHT),                corners, corner_count, pattern_was_found);           cvNamedWindow("lueseypid", CV_WINDOW_AUTOSIZE);         cvShowImage("lueseypid", chessBoardImage);         cvWaitKey(0);           cvDestroyWindow("lueseypid"); }