OpenCV findTransformECC花费的时间太长

Question

我正在使用OpenCV对齐图像，图像对齐正常。我担心的是要花多长时间。之前对齐2张照片需要4.5-5秒。

但是遵循这些人的建议：

cv2.MOTION_EUCLIDEAN for the warp_mode in ECC image alignment method

我平均可以将其降低到3.3秒。在提供的链接中，他可以将时间从6秒减少到3秒。我无法像他那样将速度提高2倍。对于2张图像而言，3.3秒可能看起来并不多，但是我想在尽可能短的时间内对齐更多的图像。

    Mat image1 = Imgcodecs.imread(fileImport);
    Mat image2 = Imgcodecs.imread(fileImport2);


    Mat image1Gray = new Mat();
    Mat image2Gray = new Mat();
    cvtColor(image1, image1Gray, Imgproc.COLOR_BGR2GRAY);
    cvtColor(image2, image2Gray, Imgproc.COLOR_BGR2GRAY);

    Mat warpMatrix = Mat.eye(3, 3, CV_32F);

    int iterations = 5000;
    double terminationEps = 1e-3;
    TermCriteria criteria = new TermCriteria(COUNT + EPS, iterations, terminationEps);

    int pyramids = 4;
    for (int i = 1; i < pyramids; i++){
        Mat resizedTemplate = new Mat();
        Mat resizedImage = new Mat();
        resize( image1Gray,
                resizedTemplate,
                new Size((double)image1Gray.width()*i/4,(double)image1Gray.height()*i/4),
                (double)i/4,
                (double)i/4,
                INTER_AREA);

        resize(image2Gray,
                resizedImage,
                new Size((double)image2Gray.width()*i/4,(double)image2Gray.height()*i/4),
                (double)i/4,
                (double)i/4,
                INTER_AREA);

        findTransformECC(resizedTemplate, resizedImage, warpMatrix, MOTION_HOMOGRAPHY, criteria, resizedImage, 1);
    }


    findTransformECC(image1Gray, image2Gray, warpMatrix, MOTION_HOMOGRAPHY, criteria, image2Gray, 1);

    Mat image2Aligned = new Mat();
    warpPerspective(image2,image2Aligned,warpMatrix, image1.size(),INTER_LINEAR + WARP_INVERSE_MAP);


    Imgcodecs.imwrite(fileExport, image2Aligned);