import cv2
camera=cv2.VideoCapture(1)
i = 0
while 1:
    (grabbed, img) = camera.read()
    cv2.imshow('img',img)
    if cv2.waitKey(1) & 0xFF == ord('j'):  # 按j保存一張圖片
        i += 1
        u = str(i)
        firename=str('./img'+u+'.jpg')
        cv2.imwrite(firename, img)
        print('寫(xiě)入：',firename)
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

# 相機(jī)標(biāo)定
import cv2
# 修改目錄
# 首先讀取圖像并轉(zhuǎn)為灰度圖
img = cv2.imread('c1.jpg')
gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
# cv2.imshow("img",img)
# cv2.imshow("gray",gray)
# 使用OpenCV的cv2.findChessboardCorners()函數(shù)找出棋盤(pán)圖中的對(duì)角（即圖片中黑白相對(duì)的點(diǎn)的坐標(biāo)）,
# 同時(shí)使用cv2.drawChessboardCorners()將之畫(huà)出來(lái)
# cv2.findChessboardCorners參數(shù)patternSize?。?,5）－－棋盤(pán)圖中每行和每列交點(diǎn)的個(gè)數(shù)
# 其原因在于導(dǎo)入的圖片./camera_cal/calibration1.jpg數(shù)一下交點(diǎn)的數(shù)目，一行有９個(gè)，一列有５個(gè)
# Adam博客當(dāng)中?。?,6）原因在于他的圖和我的圖不一樣，認(rèn)真數(shù)一下可以發(fā)現(xiàn)他的圖確實(shí)是一行９個(gè)一列６個(gè)角點(diǎn)
# 事實(shí)證明，可以取任何只要在size小于圖片中的交點(diǎn)數(shù)即可
# 函數(shù)解析參見(jiàn)官網(wǎng)https://docs.opencv.org/3.3.0/dc/dbb/tutorial_py_calibration.html
# It returns the corner points and retval which will be True if pattern is obtained.
# These corners will be placed in an order (from left-to-right, top-to-bottom)
ret, corners = cv2.findChessboardCorners(gray, (9, 5),None)
print(ret)
print(corners)  # 交點(diǎn)坐標(biāo)
if ret == True:
    img = cv2.drawChessboardCorners(img, (9, 5), corners, ret)
cv2.imshow("final",img)
cv2.waitKey()
cv2.destroyAllWindows()