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<p>It is shown that by defining a suitable measure for the comparison of images, changes in resolution can be treated with the same tool as changes in color resolution. A gray-tone image, for example, can be compared to a half-tone image having only two colors (black and white), but of higher spatial resolution. A graph-theoretical definition of the basic measure used is introduced. This is followed by application to spatial resampling and gray-level requantization. This results in a hybrid treatment of resolution, and the possibility of trading spatial for gray-level resolution and vice versa.</p>
graph theory; computer vision; resolution change; gray-tone image; half-tone image; spatial resampling; gray-level requantization; computer vision; graph theory

M. Werman, H. Rom and S. Peleg, "A Unified Approach to the Change of Resolution: Space and Gray-Level," in IEEE Transactions on Pattern Analysis & Machine Intelligence, vol. 11, no. , pp. 739-742, 1989.
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