camera_1.12_backup.py 文件源码

def remove_overlay(self, overlay):
        """
        Removes a static overlay from the preview output.

        This method removes an overlay which was previously created by
        :meth:`add_overlay`. The *overlay* parameter specifies the
        :class:`PiRenderer` instance that was returned by :meth:`add_overlay`.

        .. versionadded:: 1.8
        """
        if not overlay in self._overlays:
            raise PiCameraValueError(
                "The specified overlay is not owned by this instance of "
                "PiCamera")
        overlay.close()
        self._overlays.remove(overlay)