imageutil.py 文件源码

def shear(image, shear_factor, **kwargs):
    """
    Shear image.

    For details see:
    http://scikit-image.org/docs/dev/api/skimage.transform.html#skimage.transform.AffineTransform

    >>> image = np.eye(3, dtype='uint8')
    >>> rotated = rotate(image, 45)

    :param numpy array image: Numpy array with range [0,255] and dtype 'uint8'.
    :param float shear_factor: Shear factor [0, 1]
    :param kwargs kwargs: Keyword arguments for the underlying scikit-image
       warp function, e.g. order=1 for linear interpolation.
    :return: Sheared image
    :rtype: numpy array with range [0,255] and dtype 'uint8'
    """
    set_default_order(kwargs)
    transform = skt.AffineTransform(shear=shear_factor)
    return skt.warp(image, transform, preserve_range=True,
                    **kwargs).astype('uint8')