OpenCV: Performance Issues with Image Stitching using SIFT and BFMatcher on High-Resolution Images
I'm trying to configure I'm trying to configure I've hit a wall trying to I've been banging my head against this for hours. This might be a silly question, but I'm stuck on something that should probably be simple... I'm currently working on an image stitching project using OpenCV 4.5.3, and I'm facing significant performance issues when processing high-resolution images (around 6000x4000 pixels). I've implemented SIFT feature detection and matching using BFMatcher, but the process is taking an excessively long time to complete, sometimes exceeding several minutes for just two images. Here’s the code I’m using: ```python import cv2 import numpy as np # Load images img1 = cv2.imread('image1.jpg') img2 = cv2.imread('image2.jpg') # Convert to grayscale gray1 = cv2.cvtColor(img1, cv2.COLOR_BGR2GRAY) gray2 = cv2.cvtColor(img2, cv2.COLOR_BGR2GRAY) # Create SIFT detector sift = cv2.SIFT_create() # Find keypoints and descriptors kp1, des1 = sift.detectAndCompute(gray1, None) kp2, des2 = sift.detectAndCompute(gray2, None) # Use BFMatcher to match descriptors bf = cv2.BFMatcher(cv2.NORM_L2, crossCheck=True) matches = bf.match(des1, des2) # Sort them in ascending order of distance matches = sorted(matches, key=lambda x: x.distance) # Draw matches img_matches = cv2.drawMatches(img1, kp1, img2, kp2, matches[:50], None, flags=0) cv2.imshow('Matches', img_matches) cv2.waitKey(0) cv2.destroyAllWindows() ``` While this works, the performance is not acceptable. I've tried resizing the images to a lower resolution, which speeds up processing, but then I lose too much detail, and the stitching quality suffers. I’ve also experimented with alternative matching methods like FLANN, but the results didn’t improve significantly. Is there a way to optimize this process without sacrificing quality? Perhaps using a different approach or some parameter tweaks? Any insights on improving the performance of the SIFT and BFMatcher pipeline would be greatly appreciated. This is part of a larger CLI tool I'm building. This is part of a larger CLI tool I'm building. Am I missing something obvious? I'd really appreciate any guidance on this. Has anyone else encountered this? For reference, this is a production service. I'm working on a service that needs to handle this. Could this be a known issue?