opencv ORB两张图片蛮力匹配及官方例子错误，img3 = cv.drawMatches(img1,kp1,img2,kp2,matches[:10], flags=2)

踩坑opencv3.4官方例子量图片匹配img3 = cv.drawMatches(img1,kp1,img2,kp2,matches[:10], flags=2)，

 第六个函数outimg官方没有，很多书也是复制粘贴并没有实际操作会报错TypeError: Required argument 'outImg' (pos 6) not found

亲测成功img2 = cv2.drawMatches(img1,kp1,img2,kp2,matches[:10],None,flags=2)需将outImg加上None。本人下3.4.3官方例子错误。

 

import cv2
import numpy as np
from matplotlib import pyplot as plt



img1 = cv2.imread('box.png',0)          # queryImage
img2 = cv2.imread('box_in_scene.png',0) # trainImage
cv2.imshow("im1",img1)
cv2.imshow("im2",img2)
orb = cv2.ORB_create()

kp1, des1 = orb.detectAndCompute(img1,None)
kp2, des2 = orb.detectAndCompute(img2,None)
bf = cv2.BFMatcher(cv2.NORM_HAMMING, crossCheck=True)
matches = bf.match(des1,des2)
matches = sorted(matches, key = lambda x:x.distance)
img2 = cv2.drawMatches(img1,kp1,img2,kp2,matches[:10],None,flags=2)
plt.imshow(img2),plt.show()


cv2.waitKey(0)

cv2.destroyAllWindows()