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Image Magnification Using Median Filter and Spatial Variation

메디안 필터와 공간 변화량을 이용한 영상 확대

  • 곽내정 (목원대학교 정보통신공학과)
  • Published : 2007.09.28

Abstract

Image magnification is the estimation of a few pixel in images with high quality from a pixel of an image with low resolution and there have been studied many techniques to make images with high quality. In this paper, we propose an image interpolation method using median filter and spatial information. The proposed method makes an interpolating pixel using an average value of a median filtered value and an average value of two pixels correlated with an interpolating pixel tightly. Also we make the magnified image with improved quality to add the directional information of surrounding pixels and the characteristic of ones using average value and max value of spatial variation. We evaluate the performance using PSNR in the quality of enlarged image comparing the proposed method with existing methods. The results show the proposed method improves PSNR than the existing methods and make images preserving the characteristic of original imges.

Keywords

Interpolation;Image Magnification;Median Filter;Spatial Variation