opencv基于surf的图像拼接

以下是基于SURF特征的图像拼接的示例代码：

import cv2
import numpy as np

# 读取图像
img1 = cv2.imread('image1.jpg')
img2 = cv2.imread('image2.jpg')

# 初始化SURF检测器
surf = cv2.xfeatures2d.SURF_create()

# 检测关键点和描述符
kp1, des1 = surf.detectAndCompute(img1, None)
kp2, des2 = surf.detectAndCompute(img2, None)

# 初始化FLANN匹配器
FLANN_INDEX_KDTREE = 0
index_params = dict(algorithm=FLANN_INDEX_KDTREE, trees=5)
search_params = dict(checks=50)
flann = cv2.FlannBasedMatcher(index_params, search_params)

# 匹配关键点
matches = flann.knnMatch(des1, des2, k=2)

# 选择好的匹配点
good = []
for m, n in matches:
    if m.distance < 0.7 * n.distance:
        good.append(m)

# 获取匹配点的坐标
src_pts = np.float32([kp1[m.queryIdx].pt for m in good]).reshape(-1, 1, 2)
dst_pts = np.float32([kp2[m.trainIdx].pt for m in good]).reshape(-1, 1, 2)

# 计算变换矩阵
M, mask = cv2.findHomography(src_pts, dst_pts, cv2.RANSAC, 5.0)

# 图像拼接
result = cv2.warpPerspective(img1, M, (img1.shape[1] + img2.shape[1], img1.shape[0]))
result[0:img2.shape[0], 0:img2.shape[1]] = img2

# 显示结果
cv2.imshow('Result', result)
cv2.waitKey(0)
cv2.destroyAllWindows()