在比较两个指纹图像时抛出错误

Question

我有一个python函数，旨在比较

import os
import cv2


def isIdentical():
    best_score = 0
    filename = None
    image = None
    kp1, kp2, mp = None, None, None

    finger_print_one = cv2.imread("compare/image1.jpg")
    finger_print_two = cv2.imread("compare/image2.jpg")

    resized_1 = cv2.resize(finger_print_one, None, fx=4, fy=4)
    resized_2 = cv2.resize(finger_print_two, None, fx=4, fy=4)

    sift = cv2.SIFT_create()

    keypoints_1, descriptors_1 = sift.detectAndCompute(resized_1, None)
    keypoints_2, descriptors_2 = sift.detectAndCompute(resized_2, None)

    matches = cv2.FlannBasedMatcher({'algorithm': 1, 'trees': 10}, {}).knnMatch(descriptors_1, descriptors_2, k=2)
    match_points = []

    for p, q in matches:
        if p.distance < 0.1 * q.distance:
            match_points.append(p)

    keypoints = 0

    if len(keypoints_1) < len(keypoints_2):
        keypoints = len(keypoints_1)
    else:
        keypoints = len(keypoints_2)

    if len(match_points) / keypoints * 100 > best_score:
        best_score = len(match_points) / keypoints * 100
        image = resized_2
        kp1, kp2, mp = keypoints_1, keypoints_2, match_points

    print("SCORE: " + str(best_score))
    if len(match_points) > 0:
        result = cv2.drawMatches(resized_1, kp1, image, kp2, mp, None)
        result = cv2.resize(result, None, fx=4, fy=4)
        cv2.imshow("Result", result)
        cv2.waitKey(0)
        cv2.destroyAllWindows()


#
# one = ""
isIdentical()

当图像相同时比较这样的两个指纹图像，函数返回a best_score of 100，但是当它们是相同指纹的不同图像时， best_score 是0，match_points数组是

的

finger_print_one = cv2.imread("compare/image1.jpg")
finger_print_two = cv2.imread("compare/image1.jpg")

空

代码>

finger_print_one = cv2.imread("compare/image1.jpg")
finger_print_two = cv2.imread("compare/image2.jpg")

best_score是0，match_points是空的，

我缺少什么吗？