上面的代码报错:drawMatches(queryImage, keypoints1, trainImage, keypoints2, matches)
时间: 2023-06-24 16:03:39 浏览: 67
这个错误可能是因为`drawMatches()`函数需要指定一个输出图像,而你没有指定。你需要创建一个新的空白图像,然后将`drawMatches()`函数的输出写入该图像中。
以下是一个可能的解决方案:
```python
import cv2
# load images
queryImage = cv2.imread('image1.jpg')
trainImage = cv2.imread('image2.jpg')
# create a new blank image
outputImage = np.zeros((max(queryImage.shape[0], trainImage.shape[0]), queryImage.shape[1]+trainImage.shape[1], 3), dtype='uint8')
# detect keypoints and extract features
detector = cv2.xfeatures2d.SIFT_create()
keypoints1, descriptors1 = detector.detectAndCompute(queryImage, None)
keypoints2, descriptors2 = detector.detectAndCompute(trainImage, None)
# match keypoints
matcher = cv2.BFMatcher(cv2.NORM_L2, crossCheck=True)
matches = matcher.match(descriptors1, descriptors2)
# draw matches on the output image
cv2.drawMatches(queryImage, keypoints1, trainImage, keypoints2, matches, outputImage, flags=cv2.DrawMatchesFlags_NOT_DRAW_SINGLE_POINTS)
# show the output image
cv2.imshow('Matches', outputImage)
cv2.waitKey()
```
在这个解决方案中,我们创建了一个名为`outputImage`的新空白图像,它的大小大于或等于两个输入图像的大小,然后将其传递给`drawMatches()`函数作为输出图像。最后,我们将输出图像显示在屏幕上。