
Proceedings Paper
Optimizing color fidelity for display devices using contour phase predictive coding for text, graphics, and video contentFormat | Member Price | Non-Member Price |
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Paper Abstract
High-end monitors and TVs based on LCD technology continue to increase their native display resolution to 4k2k and
beyond. Subsequently, uncompressed pixel data transmission becomes costly when transmitting over cable or wireless
communication channels. For motion video content, spatial preprocessing from YCbCr 444 to YCbCr 420 is widely
accepted. However, due to spatial low pass filtering in horizontal and vertical direction, quality and readability of small
text and graphics content is heavily compromised when color contrast is high in chrominance channels. On the other
hand, straight forward YCbCr 444 compression based on mathematical error coding schemes quite often lacks optimal
adaptation to visually significant image content. Therefore, we present the idea of detecting synthetic small text fonts
and fine graphics and applying contour phase predictive coding for improved text and graphics rendering at the decoder
side. Using a predictive parametric (text) contour model and transmitting correlated phase information in vector format
across all three color channels combined with foreground/background color vectors of a local color map promises to
overcome weaknesses in compression schemes that process luminance and chrominance channels separately. The
residual error of the predictive model is being minimized more easily since the decoder is an integral part of the encoder.
A comparative analysis based on some competitive solutions highlights the effectiveness of our approach, discusses
current limitations with regard to high quality color rendering, and identifies remaining visual artifacts.
Paper Details
Date Published: 4 February 2013
PDF: 9 pages
Proc. SPIE 8652, Color Imaging XVIII: Displaying, Processing, Hardcopy, and Applications, 86520X (4 February 2013); doi: 10.1117/12.2006775
Published in SPIE Proceedings Vol. 8652:
Color Imaging XVIII: Displaying, Processing, Hardcopy, and Applications
Reiner Eschbach; Gabriel G. Marcu; Alessandro Rizzi, Editor(s)
PDF: 9 pages
Proc. SPIE 8652, Color Imaging XVIII: Displaying, Processing, Hardcopy, and Applications, 86520X (4 February 2013); doi: 10.1117/12.2006775
Show Author Affiliations
Fritz Lebowsky, STMicroelectronics Grenoble SAS (France)
Published in SPIE Proceedings Vol. 8652:
Color Imaging XVIII: Displaying, Processing, Hardcopy, and Applications
Reiner Eschbach; Gabriel G. Marcu; Alessandro Rizzi, Editor(s)
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