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Edge Enhancement of Halftone Image using Adaptive Error Diffusion Method  

Kim, Sang-Chul (School of Electronics Engineering and Computer Science, Kyungpook National University)
Chien, Sung-Il (School of Electronics Engineering and Computer Science, Kyungpook National University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SP / v.48, no.6, 2011 , pp. 96-104 More about this Journal
Abstract
A halftoning method is used to obtain a binary image visually similar to a continuous gray-level image through the image output devices employing the limited number of gray-levels. As a halftoning method, the error diffusion method is widely used in various applications because of its low computational complexity and good image quality. However, this method weakens the edge in the process of error diffusion to the neighboring pixels. In this case, degradation of the edge quality and damage of the vivid image is expected. To solve these problems, the proposed method determines the adaptive error filter considering the error information of the present pixel and edge distribution of the neighbor pixels. Compared with the conventional methods for enhancing edges, the proposed method involves relatively a few process resources because of its simple procedure, still considerably improving the edges in the halftone image. To evaluate the objective image quality, the performance of the proposed method is compared with that of the conventional method in terms of the edge correlation and the local average accordance.
Keywords
halftone image; error diffusion; error filter; edge enhancement;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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