| Author: | Yu, Ka-wah Neil Bryant |
| Title: | A study on the performance of multiscale error diffusion algorithms |
| Degree: | M.Sc. |
| Year: | 2006 |
| Subject: | Hong Kong Polytechnic University -- Dissertations Photoengraving -- Halftone process -- Mathematical models. Printing -- Technique -- Mathematical models Image processing -- Digital techniques |
| Department: | Department of Electronic and Information Engineering |
| Pages: | viii, 80 leaves : ill. (some col.) ; 30 cm. |
| Language: | English |
| Abstract: | Halftoning is a process of converting a continuous-tone image into bi-level image. Error Diffusion has been used to serve the purpose for years. However, due to the raster scanning nature of the diffusion process, visual artifacts exist in the output image. Modifications to error diffusion have been proposed and Multiscale Error Diffusion is one of the modifications. Multiscale Error Diffusion (MED) was first proposed in 1997 by Katsavounidis and C.C.J. Kuo and improved in 1998 and 2004. By subjective inspection, it is superior to the conventional error diffusion algorithms as pattern noise and directional hysteresis are removed in its outputs. However, so far there has been no detailed analytical evaluation reported to show the performance difference between them. The goal of this dissertation is to present the results of our study on the performance of different MED algorithms. |
| Rights: | All rights reserved |
| Access: | restricted access |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| b19580551.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 6.64 MB | Adobe PDF | View/Open |
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