尽管ORB特征匹配看起来非常可靠,而且我只对cv.findHomography进行了20次最佳匹配,但得到的多段线非常糟糕。注意,在所附图像中显示的结果中,右上角图像是视频流。因此,结果的变化是一致的。是否有一个图书馆可以用来获得更好的结果?或者我的代码中是否有重大错误
# des1 & des2 are created with cv.ORB_create(10000, 1.2, nlevels=8, edgeThreshold=5)
kp2, des2 = orb.detectAndCompute(gray, None)
matches = bf.knnMatch(des1, des2, k=2)
good = []
for m, n in matches:
if m.distance < 0.75 * n.distance:
good.append(m)
matches = sorted(good, key=lambda x: x.distance)
src_pts = np.float32([kp1[m.queryIdx].pt for m in matches[:20]]).reshape(-1, 1, 2)
dst_pts = np.float32([kp2[m.trainIdx].pt for m in matches[:20]]).reshape(-1, 1, 2)
M, mask = cv.findHomography(dst_pts, src_pts, cv.RANSAC, 5.0)
matchesMask = mask.ravel().tolist()
h = src_pts.max(0)[0][1] - src_pts.min(0)[0][1]
w = src_pts.max(0)[0][0] - src_pts.min(0)[0][0]
pts = np.float32([[0, 0], [0, h - 1], [w - 1, h - 1], [w - 1, 0]]).reshape(-1, 1, 2)
dst = cv.perspectiveTransform(pts, M)
img3 = None
img3 = cv.drawMatchesKnn(img1, kp1, gray, kp2, good, img3, flags=cv.DrawMatchesFlags_NOT_DRAW_SINGLE_POINTS)
img3 = cv.polylines(img3, [np.int32(dst)], True, (0, 0, 255), 3, cv.LINE_AA)
# Code for showing img3 would follow
此设置可能有几个问题:
图像质量低。较小的图像分辨率较低且有点模糊,这使得匹配更加困难,因此可能会出现更多的异常值。图像分辨率较高,仅以小比例显示,因此此点无效李>相关问题 更多 >
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