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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/50861

Title: Algorithms of halftoning color images with edge enhancement
Authors: Jim Z.C.Lai
Chia-Chi Chen
Contributors: 國立臺灣海洋大學:資訊工程學系
Date: 2003-12
Issue Date: 2018-10-29T02:24:11Z
Publisher: Journal of Visual Communication and Image Representation
Abstract: Abstract
Printers usually generate a limited number of colors and lack the ability of producing continuous-tone color images. Traditional error-diffusion algorithms are used to solve this problem. Compared with other approaches, the approaches of using error-diffusion in general can generate halftoned images of better quality. However, smeared edges and textures may occur in these halftoned images. To produce halftoned images of higher quality, these artifacts due to unstable images, dot-overlap, and error-diffusion must be eliminated or reduced. In this paper, we show that unstable images can be eliminated or reduced through using a proper color difference formula to select the reproduction colors even vector error-diffusion is performed in the RGB domain. We also present a method of using different filters to halftone different components of a color. This approach may have clearer and sharper edges for halftoned color images. Unexpected colors may be generated due to dot-overlap in the printing process. We have presented a method to eliminate this color distortion in the process of error-diffusion. Halftoning a color image by our proposed error-diffusion algorithm with edge enhancement has the following characteristics: the unstable images do not exist; the color-error caused by dot-overlap is corrected; and the smeared edges are sharpened.
Relation: 14(4) pp.389-404
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/50861
Appears in Collections:[資訊工程學系] 期刊論文

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