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Abstract

A method and apparatus for enhancing an image defined by electrical signals representing the colour component content of each pixel of a relatively high resolution version of the image. The apparatus comprises a first store for storing the high resolution version of the image; a second store for storing fringe values; and a processor coupled with the first and second stores. The processor is adapted to determine for each colour component of each pixel in the first store a fringe value by determining the difference between the component values at the high resolution and at a lower resolution and to store the fringe values in the second store; to determine for each pixel the length of a vector whose components are defined by values related to the fringe values of that pixel; and to modify each original colour component value in the first store by an amount related to the respective fringe value determined in accordance with the relationship of the vector length with a threshold.

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First Claim