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http://dx.doi.org/10.5573/ieek.2013.50.5.175

Readability Enhancement Algorithm for Patterned Retarder based Stereoscopic 3D display  

Lee, Hui Jung (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.5, 2013 , pp. 175-182 More about this Journal
Abstract
This paper proposes a readability enhancement filter for Patterned Retarder (PR) display. In general, when some texts in stereoscopic images are shown on PR display, their readability tends to be lowered. In order to overcome this problem, we present a readability enhancement algorithm which consists of readability filtering stage and post-processing stage for specific characters. First, each input stereo image is divided into an odd line image and an even line image. Then, they are independently up-scaled vertically by using Lanczos filter. Next, two up-scaled line images are averaged considering vertical phase difference. In post-processing stage, two specific characters which are normally difficult to read on PR display are detected, and they are filtered for additional readability enhancement. Here, this additional filtering is based on a specific brightness adjustment, and is applied only for two characters. The experiment results show that the proposed method achieves significant improvement in terms of readability in comparison with the previous scheme.
Keywords
readability enhancement; stereoscopic display; PR;
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