Louka, can you explain point spread functions in detail? The paper does not do this, yet it depends highly on these functions.

Engineering-wise, are we using a common region of the low resolution frames to get the super-resolution image? Otherwise, some frames may not contain the whole area of the image that we are interested in. But yet then what would be different between the frames?

Are there any conditions where if we select a subset of all the frames, we perform better?