image.py 文件源码

def image_function(self, image):
        source_height, source_width = image.shape
        target_height, target_width = self.output_image_shape
        # We're on Python 3 - take a deep breath and relax.
        zoom_height, zoom_width = (target_height / source_height), (target_width / source_width)
        with catch_warnings():
            # Ignore warning that scipy should be > 0.13 (it's 0.19 these days)
            simplefilter('ignore')
            rescaled_image = zoom(image, (zoom_height, zoom_width),
                                  order=self.interpolation_order, **self.zoom_kwargs)
        # This should never happen
        assert_(rescaled_image.shape == (target_height, target_width),
                "Shape mismatch that shouldn't have happened if you were on scipy > 0.13.0. "
                "Are you on scipy > 0.13.0?",
                ShapeError)
        return rescaled_image