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を使用して2つの画像をステッチしようとしていますBRISK+FREAK

コードは次のとおりです。一致を描画しようとすると、エラーが発生します

エラー: OpenCV(4.1.2) /io/opencv/modules/features2d/src/draw.cpp:225: エラー: (-215: アサーションに失敗しました) i1 >= 0 && i1 < static_cast(keypoints1.size()) で関数「drawMatches」

import cv2
import numpy as np
import matplotlib.pyplot as plt

trainImg = cv2.imread('/content/img1.JPG')
trainImg_gray = cv2.cvtColor(trainImg, cv2.COLOR_BGR2GRAY)

queryImg = cv2.imread('/content/img2.JPG')
queryImg_gray = cv2.cvtColor(queryImg, cv2.COLOR_BGR2GRAY)

def detectAndDescribe(image, method=None):
    """
    Compute key points and feature descriptors using an specific method
    """
    
    descriptor = cv2.BRISK_create()
    # get keypoints and descriptors
    (kps, features) = descriptor.detectAndCompute(image, None)

    freakExtractor = cv2.xfeatures2d.FREAK_create()
    keypoints,descriptors= freakExtractor.compute(image,kps)

    return (keypoints, features)

method = 'brisk'
feature_extractor = 'brisk'
feature_matching = 'bf'
kpsA, featuresA = detectAndDescribe(trainImg_gray, method=feature_extractor)
kpsB, featuresB = detectAndDescribe(queryImg_gray, method=feature_extractor)

"Create and return a Matcher Object"
createMatcher = lambda crossCheck :  cv2.BFMatcher(cv2.NORM_HAMMING, crossCheck=crossCheck)

def matchKeyPointsBF(featuresA, featuresB, method):
    bf = createMatcher(crossCheck=True)
        
    # Match descriptors.
    best_matches = bf.match(featuresA,featuresB)
    
    # Sort the features in order of distance.
    # The points with small distance (more similarity) are ordered first in the vector
    rawMatches = sorted(best_matches, key = lambda x:x.distance)
    print("Raw matches (Brute force):", len(rawMatches))
    return rawMatches

print("Using: {} feature matcher".format(feature_matching))

fig = plt.figure(figsize=(20,8))

matches = matchKeyPointsBF(featuresA, featuresB, method=feature_extractor)
img3 = cv2.drawMatches(trainImg,kpsA,queryImg,kpsB,matches,None,flags=cv2.DrawMatchesFlags_NOT_DRAW_SINGLE_POINTS)
    

plt.imshow(img3)
plt.show()

これは私が得る完全なエラーです

使用: bf 機能マッチャー 生の一致 (ブルート フォース): 1967 ----------------------------------- -------------------------------------- error Traceback (最新の呼び出しが最後) in () 4 5 マッチ = matchKeyPointsBF(featuresA, featuresB, method=feature_extractor) ----> 6 img3 = cv2.drawMatches(trainImg,kpsA,queryImg,kpsB,matches,None,flags=cv2.DrawMatchesFlags_NOT_DRAW_SINGLE_POINTS) 7 8

エラー: OpenCV(4.1.2) /io/opencv/modules/features2d/src/draw.cpp:225: エラー: (-215: アサーションに失敗しました) i1 >= 0 && i1 < static_cast(keypoints1.size()) で関数「drawMatches」

ここで何が問題なのかわからないようです。このOpenCV Sift/Surf/Orb : drawMatch function is not working wellを見つけました これを修正する方法を理解できません

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