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Vol. 163, Issue 1, January 2014, pp. 113-120




A New Filtering Algorithm for Preserving Edges and Details of Digital Images

Yueqiu Jiang, Xiangwen Fu, Hongwei Gao, Shuang Ma

Shenyang Ligong University, Shenyang, 110000, China
Tel.: (024) 24686105

E-mail: missjiangyueqiu@sina.com, fu40431@163.com


Received: 22 October 2014 /Accepted: 9 January 2014 /Published: 31 January 2014

Digital Sensors and Sensor Sysstems


Abstract: In order to overcome the shortage that the traditional image filtering algorithm can not preserve edges and details of digital images when filter out noises, a valid filtering algorithm for preserving edges and details of images is proposed in this paper. The algorithm first determines the pixel to be processed belongs to these three category that pixel belongs to the image itself, the background or the introducing noise of the process of image generation or transmission, and then uses different filtering policies to filter out noises according to the result of judgment. Because of different templates are used to filter out the pending pixel according to which template the pending pixel belongs to, the filtering algorithm can filter out noises as well as keeps the image’s edges and details effectively. The proposed algorithm is tested against different images, and it gives a better peak signal to noise ratio and a lower normalized mean square error. These results have also been checked and analyzed visually. The experimental results show that the proposed filtering algorithm not only can filter out the noise in image effectively but also protect edges and details of digital image well.


Keywords: Filtering algorithm, Edges, Details, Digital image.


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