【OpenCV】用cvCalibrateCamera2函数做标定出错，大家帮忙看下吧

Posted 2023-04-17

用cvCalibrateCamera2做标定，编译通过，运行却出错。
我用4张靶标图片，48个点，基本定义如下：
CvMat *object_points = cvCreateMat(4*48, 3, CV_32FC1); // 定标点的世界坐标
CvMat *image_points = cvCreateMat(4*48, 2, CV_32FC1); // 定标点的图象坐标

CvMat *point_counts = cvCreateMat(4, 1, CV_32FC1);
cvSetData( point_counts, &numcorners, sizeof(int)); //numcorners=48

CvMat *distortion = cvCreateMat(1, 4, CV_32FC1); // 形变向量d
CvMat *cameraMatrix = cvCreateMat(3, 3, CV_32FC1); // 内参矩阵A
CvMat *transVects = cvCreateMat(4, 3, CV_32FC1); // 平移向量t
CvMat *rotMatrixes = cvCreateMat(4, 3, CV_32FC1); // 旋转矩阵R
编译通过，运行出错，提示：
unsupported format or combination of formats(the array of point counters must be 1-demensional integer vector),in function cvCalibrateCamera2,C:\User\VP\opencv\cv\src\cvcvcalibration.cpp(1307)
不知是什么原因？
函数定义：
void cvCalibrateCamera2( const CvMat* object_points, const CvMat* image_points,
const CvMat* point_counts, CvSize image_size,
CvMat* intrinsic_matrix, CvMat* distortion_coeffs,
CvMat* rotation_vectors=NULL,
CvMat* translation_vectors=NULL,
int flags=0 );

参考技术A CvMat *point_counts = cvCreateMat(4, 1, CV_32FC1);
改成
CvMat *point_counts = cvCreateMat(4, 1, CV_32SC1);

应该是整数 参考技术B wwhmyself 老兄:
我用你的代码跑了一下结果运行错误为：
Opencv GUI Handler
NULL pointer(NULL array pointer is passed)
in function cvGetMat,D:\Program Files\OpenCV\cxcore\src\cxarray.cpp(2780)
请帮忙指点错误在那。感谢！

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怎么用opencv在图上点四个点，把四点连接，组成一个封闭的图形？

参考技术A import cv2
import numpy as np

img_size = (210,210)
image = np.ones(img_size) * 255

x1 = 10
y1 =10
x2 = 200
y2 = 200

lineThickness = 2
cv2.line(image, (x1, y1), (x1, y2), (0,255,0), lineThickness)
cv2.line(image, (x1, y1), (x2, y1), (0,255,0), lineThickness)
cv2.line(image, (x1, y2), (x2, y2), (0,255,0), lineThickness)
cv2.line(image, (x2, y1), (x2, y2), (0,255,0), lineThickness)

cv2.imshow('oo',image)
cv2.waitKey()