Patent ID: 7433536
Filing Date: 2008-10-07
Classification: G06T,H04N

Abstract:
1. A method for enhancing an image, comprising: obtaining a first image signal including pixel values; obtaining a high-pass image signal having high-frequency components of the first image signal; evaluating if at least one side of a pixel is a constant image region, and evaluating if the pixel itself is not in a constant image region, such that if both conditions are satisfied then concluding that the given one of the pixel values of the first image represents a boundary of an edge; selecting edge pixel values representing the boundary of the edge in the first image; defining a gain suppressing function; multiplying the gain suppressing function with a weighting factor with particular pixel values of the high-pass image signal corresponding in location to the edge pixel values to obtain a result; and adding the result to the first image signal to obtain an enhanced image signal in which the shoots have been suppressed.