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http://dx.doi.org/10.5573/ieek.2013.50.3.113

Sub-Pixel Rendering Algorithm Using Adaptive 2D FIR Filters  

Nam, Yeon Oh (School of Electronic Engineering, Inha University)
Choi, Ik Hyun (School of Electronic Engineering, Inha University)
Song, Byung Cheol (School of Electronic Engineering, Inha University)
Publication Information
Journal of the Institute of Electronics and Information Engineers / v.50, no.3, 2013 , pp. 113-121 More about this Journal
Abstract
In this paper, we propose a sub-pixel rendering algorithm using learning-based 2D FIR filters. The proposed algorithm consists of two stages: the learning and synthesis stages. At the learning stage, we produce the low-resolution synthesis information derived from a sufficient number of high/low resolution block pairs, and store the synthesis information into a so-called dictionary. At the synthesis stage, the best candidate block corresponding to each input high-resolution block is found in the dictionary. Next, we can finally obtain the low-resolution image by synthesizing the low-resolution block using the selected 2D FIR filter on a sub-pixel basis. On the other hand, we additionally enhance the sharpness of the output image by using pre-emphasis considering RGB stripe pattern of display. The simulation results show that the proposed algorithm can provide significantly sharper results than conventional down-sampling methods, without blur effects and aliasing.
Keywords
sharpening; contrast enhancement; down-sampling; sub-pixel rendering;
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