Apply David Lowe s Scale Invariant Feature Transform (SIFT) algorithm to a grayscale image. This algorithm takes a grayscale image as input and returns a set of scale- and rotationally invariant keypoints allong with their corresponding feature descr iptors.-Apply David Lowe s Scale Invariant Feature Transform (SIFT) algorithm to a grayscale image.　This algorithm takes a grayscale image as input and returns a set of scale- and rotationally invariant keypoints allong with their corresponding feature descr iptors.