def get_residuals_update_tile(st, padded_tile):
inner_tile = st.ishape.intersection([st.ishape, padded_tile])<EOL>return inner_tile.translate(-st.pad)<EOL>
Translates a tile in the padded image to the unpadded image.

Given a state and a tile that corresponds to the padded image, returns
a tile that corresponds to the the corresponding pixels of the difference
image

Parameters
----------
    st : :class:`peri.states.State`
        The state
    padded_tile : :class:`peri.util.Tile`
        The tile in the padded image.

Returns
-------
    :class:`peri.util.Tile`
        The tile corresponding to padded_tile in the unpadded image.