descriptors.py 文件源码

def sift(img):
    """
    Gets a list of 128 - dimensional descriptors using SIFT and DoG
    for keypoints and resizes the image having the larger dimension set to 640
    and keeping the size relation.

    Args:
        img (BGR matrix): The grayscale image that will be used.

    Returns:
        list of floats array: The descriptors found in the image.
    """
    sift = cv2.SIFT()
    kp, des = sift.detectAndCompute(img, None)
    return des