python中OpenCV的Flann匹配器索引

import cv2
import numpy as np

# 读取图像并检测特征点及描述符
img1 = cv2.imread('image1.jpg', cv2.IMREAD_GRAYSCALE)
img2 = cv2.imread('image2.jpg', cv2.IMREAD_GRAYSCALE)

# 使用ORB检测器
orb = cv2.ORB_create()
kp1, des1 = orb.detectAndCompute(img1, None)
kp2, des2 = orb.detectAndCompute(img2, None)

# FLANN参数
FLANN_INDEX_LSH = 6
index_params = dict(algorithm=FLANN_INDEX_LSH,
                    table_number=6,  # 12
                    key_size=12,     # 20
                    multi_probe_level=1)  # 2
search_params = dict(checks=50)

flann = cv2.FlannBasedMatcher(index_params, search_params)
matches = flann.knnMatch(des1, des2, k=2)

# 绘制匹配结果
img_matches = cv2.drawMatchesKnn(img1, kp1, img2, kp2, matches, None, flags=cv2.DrawMatchesFlags_NOT_DRAW_SINGLE_POINTS)

cv2.imshow('Matches', img_matches)
cv2.waitKey(0)
cv2.destroyAllWindows()