嗨,我正在使用Python OpenCV的ORB算法进行特征匹配,但是当我运行这段代码时,我遇到了以下错误:
Traceback (most recent call last):
File "ffl.py", line 27, in
for m,n in matches:
TypeError: 'cv2.DMatch' object is not iterable
我不知道该如何解决它。
import numpy as np
import cv2
import time
ESC=27
camera = cv2.VideoCapture(0)
orb = cv2.ORB_create()
bf = cv2.BFMatcher(cv2.NORM_HAMMING, crossCheck=True)
imgTrainColor = cv2.imread('/home/shar/home.jpg')
imgTrainGray = cv2.cvtColor(imgTrainColor, cv2.COLOR_BGR2GRAY)
kpTrain = orb.detect(imgTrainGray,None)
kpTrain, desTrain = orb.compute(imgTrainGray, kpTrain)
firsttime = True
while True:
ret, imgCamColor = camera.read()
imgCamGray = cv2.cvtColor(imgCamColor, cv2.COLOR_BGR2GRAY)
kpCam = orb.detect(imgCamGray,None)
kpCam, desCam = orb.compute(imgCamGray, kpCam)
bf = cv2.BFMatcher(cv2.NORM_HAMMING, crossCheck=True)
matches = bf.match(desCam,desTrain)
good = []
for m,n in matches:
if m.distance < 0.7*n.distance:
good.append(m)
if firsttime==True:
h1, w1 = imgCamColor.shape[:2]
h2, w2 = imgTrainColor.shape[:2]
nWidth = w1+w2
nHeight = max(h1, h2)
hdif = (h1-h2)/2
firsttime=False
result = np.zeros((nHeight, nWidth, 3), np.uint8)
result[hdif:hdif+h2, :w2] = imgTrainColor
result[:h1, w2:w1+w2] = imgCamColor
for i in range(len(matches)):
pt_a=(int(kpTrain[matches[i].trainIdx].pt[0]), int(kpTrain[matches[i].trainIdx].pt[1]+hdif))
pt_b=(int(kpCam[matches[i].queryIdx].pt[0]+w2), int(kpCam[matches[i].queryIdx].pt[1]))
cv2.line(result, pt_a, pt_b, (255, 0, 0))
cv2.imshow('Camara', result)
key = cv2.waitKey(20)
if key == ESC:
break
cv2.destroyAllWindows()
camera.release()
queryIdx
给出了你正在尝试匹配的原始图像上关键点的索引,而trainIdx
给出了参考图像上匹配的关键点的索引。 - Eyshika