cv.py 文件源码

def warp(img, corners):
    """
    Warpes an image by keeping its size, transforming the pixel data to 
    be distorted between the four corners.
    """

    width = len(img[0])
    height = len(img)

    src = numpy.array((
        corners['upper_left'],
        corners['lower_left'],
        corners['lower_right'],
        corners['upper_right']
    ))

    dst = numpy.array((
        (0, 0),
        (0, height),
        (width, height),
        (width, 0)
    ))

    tform = transform.ProjectiveTransform()
    tform.estimate(src, dst)

    return transform.warp(img, tform, output_shape=(height,width))