An Edge-Preserving Adaptive Bilateral Filter Based on Sobel Operator for Improving Image Quality Over Compression Ratio 


Vol. 42,  No. 10, pp. 1886-1895, Oct.  2017
10.7840/kics.2017.42.10.1886


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  Abstract

In obtaining the digital image from any device, noise is inevitably generated, which reduces the compression efficiency. In order to increase the compression efficiency, the development of a filter for preserving the edge sensitive to the vision while eliminating the noise in the image processing field has been an important issue regardless of the times. Bilateral filter proposed by C. Tomasi are generally used because of its simplicity and efficiency of computation. However, parameter of bilateral filter inputted by the user are applied to all the pixels in the image without considering context around the pixels. Therefore, there is a problem that it is not possible to adaptively apply a suitable parameter to the pixel. In this paper, we propose an algorithm to adaptively select a parameter by estimating the relationship between the complexity of the surroundings in using sobel operator and the parameter of the bilateral filter that maximizes the image quality. Experimental results show that the proposed method has better PSNR than the conventional bilater filter as well as other algorithms that show improved performance. Especially, proposed method has better performance at edge than others.

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  Cite this article

[IEEE Style]

G. Jeon, E. Oh, Y. Choe, "An Edge-Preserving Adaptive Bilateral Filter Based on Sobel Operator for Improving Image Quality Over Compression Ratio," The Journal of Korean Institute of Communications and Information Sciences, vol. 42, no. 10, pp. 1886-1895, 2017. DOI: 10.7840/kics.2017.42.10.1886.

[ACM Style]

Gi-hyeon Jeon, Eui-yeol Oh, and Yoon-sik Choe. 2017. An Edge-Preserving Adaptive Bilateral Filter Based on Sobel Operator for Improving Image Quality Over Compression Ratio. The Journal of Korean Institute of Communications and Information Sciences, 42, 10, (2017), 1886-1895. DOI: 10.7840/kics.2017.42.10.1886.

[KICS Style]

Gi-hyeon Jeon, Eui-yeol Oh, Yoon-sik Choe, "An Edge-Preserving Adaptive Bilateral Filter Based on Sobel Operator for Improving Image Quality Over Compression Ratio," The Journal of Korean Institute of Communications and Information Sciences, vol. 42, no. 10, pp. 1886-1895, 10. 2017. (https://doi.org/10.7840/kics.2017.42.10.1886)

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pISSN : 1226 - 4717
eISSN : 2287 - 3880