A Unified Approach to the Change of Resolution: Space and Gray-Level

  • Authors:
  • S. Peleg;M. Werman;H. Rom

  • Affiliations:
  • Hebrew Univ. of Jerusalem, Jerusalem, Israel;Hebrew Univ. of Jerusalem, Jerusalem, Israel;Hebrew Univ. of Jerusalem, Jerusalem, Israel

  • Venue:
  • IEEE Transactions on Pattern Analysis and Machine Intelligence
  • Year:
  • 1989

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Abstract

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.