我的python代码在图像上找不到棋盘。
我使用以下代码来解决此任务:
import numpy as np
import cv2
import glob
# termination criteria
criteria = (cv2.TERM_CRITERIA_EPS + cv2.TERM_CRITERIA_MAX_ITER, 30, 0.001)
# prepare object points, like (0,0,0), (1,0,0), (2,0,0) ....,(6,5,0)
a = 7
b = 6
objp = np.zeros((b*a,3), np.float32)
objp[:,:2] = np.mgrid[0:a,0:b].T.reshape(-1,2)
# Arrays to store object points and image points from all the images.
objpoints = [] # 3d point in real world space
imgpoints = [] # 2d points in image plane.
images = glob.glob('*.jpg')
for fname in images:
img = cv2.imread(fname)
gray = cv2.cvtColor(img,cv2.COLOR_BGR2GRAY)
# Find the chess board corners
ret, corners = cv2.findChessboardCorners(gray, (a,b), None)
print(fname, ret)
# If found, add object points, image points (after refining them)
if ret == True:
objpoints.append(objp)
cv2.cornerSubPix(gray,corners,(11,11),(-1,-1),criteria)
imgpoints.append(corners)
# Draw and display the corners
cv2.drawChessboardCorners(img, (a,b), corners, ret)
cv2.imshow('img',img)
cv2.waitKey(-1)
cv2.destroyAllWindows()
我使用以下测试图像:
我成功地使用findCirclesGrid。我做错了什么?
我尝试像this post一样锐化图像
更新1
我使用此类图像,并且findChessboardCorners再次失败。
当我使用哈里斯角落探测器时,它会返回许多错误,并且很难将哈里斯的结果用于相机校准。
最佳答案
这是9x6板,不是7x6板。更改a = 9。边界线并不重要。
关于opencv - OpenCV的findChessboardCorners失败,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/42702157/