This thesis presents a novel algorithm for improving quality of edges in printed text. The algorithm is designed to add pixels at selected edge locations after halftoning. The extent of the correction is proportional to the “strength” of the edge, as determined by comparing the local differences in a four-pixel neighborhood to a dynamically generated threshold. The process is computationally efficient and requires minimal memory resources. The performance of our proposed algorithm is clearly demonstrated on several characters and lines. While the algorithm aims to improve the quality of printed text (edges), it is possible to extend its application to improvement of any edge identifiable in an image document.

Library of Congress Subject Headings

Laser printing--Data processing; Color printing--Data processing; Imaging systems--Image quality

Publication Date


Document Type


Department, Program, or Center

Electrical Engineering (KGCOE)


Saber, Eli

Advisor/Committee Member

Dianat, Sohail

Advisor/Committee Member

Peskin, Eric


Note: imported from RIT’s Digital Media Library running on DSpace to RIT Scholar Works. Physical copy available through RIT's The Wallace Library at: Z249.4 .R43 2007


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