Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/34166
Title: Fast image interpolation using the bilateral filter
Authors: Hung, K
Siu, W 
Issue Date: 2012
Source: IET Image processing, 2012, v. 6, no. 7, p. 877-890 How to cite?
Journal: IET Image Processing 
Abstract: In this study, the authors propose a new image interpolation technique using the bilateral filter to estimate the unknown high-resolution pixels. Compared with the least-squares estimation, a small-kernel bilateral filter has the advantages of fast computation and stability. The range distance of the bilateral filter is estimated using a novel maximum a posterior estimation, in order to consider both the diagonal and vertical-horizontal correlations. For the consideration of global consistency, the pixel-based soft-decision estimation (SAI) is proposed to constrain the consistency of edge statistic within a local window. Experimental results show that the interpolated images using the proposed algorithm give an average of 0.462, 0.413, 0.532 and 0.036 dB peak signal-to-noise ratio (PSNR) improvement compared with that using the bicubic interpolation, linear minimum mean squares error estimation, new edge-directed interpolation (NEDI) and SAI respectively. The subjective quality agrees with the PSNR as well. More importantly, the proposed algorithm is fast and it requires around 1/60 computational cost of the SAI.
URI: http://hdl.handle.net/10397/34166
ISSN: 1751-9659
DOI: 10.1049/iet-ipr.2011.0050
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