帮我写一个python实现相机标定
时间: 2023-05-21 07:05:44 浏览: 99
当然可以。实现相机标定的常用方法是使用张正友标定法(Zhang's method)。首先,需要使用棋盘格图像进行拍摄。然后,对每张棋盘格图像提取棋盘格角点,并对真实世界中的棋盘格点进行定位。接下来,使用这些角点进行相机标定,可以得到相机内参矩阵、畸变系数和外参矩阵等信息。下面是一个简单的python示例代码:
import numpy as np
import cv2
# 定义棋盘格参数
cbrow = 6 # 棋盘格行数
cbcol = 8 # 棋盘格列数
cbsize = 30 # 棋盘格方格大小(毫米)
# 定义全局变量
objpoints = [] # 3D 空间点
imgpoints = [] # 2D 图像点
# 读取图像
images = []
for i in range(1, 21):
img = cv2.imread('calib%d.jpg' % i)
images.append(img)
# 提取角点
imgidx = 0
for img in images:
imgidx += 1
gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
ret, corners = cv2.findChessboardCorners(gray, (cbcol, cbrow), None)
if ret:
objp = np.zeros((cbrow * cbcol, 3), np.float32)
objp[:, :2] = np.mgrid[0:cbcol, 0:cbrow].T.reshape(-1, 2) * cbsize
objpoints.append(objp)
corners2 = cv2.cornerSubPix(gray, corners, (11, 11), (-1, -1),
criteria = (cv2.TERM_CRITERIA_EPS + cv2.TERM_CRITERIA_MAX_ITER, 30, 0.001))
imgpoints.append(corners2)
img = cv2.drawChessboardCorners(img, (cbcol, cbrow), corners2, ret)
cv2.imshow('img%d' % imgidx, img)
cv2.waitKey(500)
cv2.destroyAllWindows()
# 相机标定
ret, mtx, dist, rvecs, tvecs = cv2.calibrateCamera(objpoints, imgpoints, gray.shape[::-1], None, None)
print('相机内参矩阵:\n', mtx)
print('畸变系数:\n', dist)
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