Text enhancement methodology in scanned images of gray-scale documents

Abstract

The present invention is to provide a text enhancement methodology of gray-scale levels of a scanned image so as to enhance text legibility. The text enhancement methodology includes the following steps of: utilizing a window block pattern as a fumdamental processing unit to read the scanned image, wherein the window block pattern comprises at least two pixels in a predetermined neighborhood; analyzing the scanned image in the window block pattern to find right, left, upper, and bottom edges; labeling the image in the window block pattern as two groups of text pixels and non-text pixels based on the window block pattern and the right, left, upper, and bottom edges; and enhancing the text pixels/non-text pixels of scanned image in the window block pattern based on the window block pattern and the right, left, upper, and bottom edges.

Dependencies are inferred from the claim text.