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VLSI DesignVolume 2013 2013, Article ID 738057, 9 pages

Research ArticleDepartment of Electronic Engineering and Graduate Institute of Computer and Communication Engineering, National Taipei University of Technology, 1, Section 3, Chung-Hsiao East Road, Taipei 10608, Taiwan

Received 5 October 2012; Accepted 18 January 2013

Academic Editor: Yeong-Kang Lai

Copyright © 2013 Yu-Cheng Fan and Yi-Feng Chiang. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Many people use digital still cameras to take photographs in contemporary society. Significant amounts of digital information have led to the emergence of a digital era. Because of the small size and low cost of the product hardware, most image sensors use a color filter array to obtain image information. However, employing a color filter array results in the loss of image information; thus, a color interpolation technique must be employed to retrieve the original picture. Numerous researchers have developed interpolation algorithms in response to various image problems. The method proposed in this study involves integrating discrete wavelet transform DWT into the interpolation algorithm. The method was developed based on edge weight and partial gain characteristics and uses the basic wavelet function to enhance the edge performance and processes of the nearest or larger and smaller direction gradients. The experiment results were compared to those of other methods to verify that the proposed method can improve image quality.

Author: Yu-Cheng Fan and Yi-Feng Chiang

Source: https://www.hindawi.com/


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