project_v2.py 文件源码

def weighted_img(img, initial_img, ?=0.8, ?=1., ?=0.):
    """
    `img` is the output of the hough_lines(), An image with lines drawn on it.
    Should be a blank image (all black) with lines drawn on it.
    `initial_img` should be the image before any processing.
    The result image is computed as follows:
    initial_img * ? + img * ? + ?
    NOTE: initial_img and img must be the same shape!
    """
    return cv2.addWeighted(initial_img, ?, img, ?, ?)