Improving nonlinear up-scaling by adapting to the local edge orientation

Jeroen A. P. Tegenbosch; Paul M. Hofman; Marco K. Bosma

doi:10.1117/12.525714

18 January 2004 Improving nonlinear up-scaling by adapting to the local edge orientation

Jeroen A. P. Tegenbosch, Paul M. Hofman, Marco K. Bosma

Author Affiliations +

Proceedings Volume 5308, Visual Communications and Image Processing 2004; (2004) https://doi.org/10.1117/12.525714
Event: Electronic Imaging 2004, 2004, San Jose, California, United States

Abstract

Currently, the demand for larger screens and high-definition (HD) television-sets is rapidly increasing. To display standard definition (SD) video on high-resolution television sets, spatial up-scaling techniques are necessary to increase the resolution. One technique that makes this possible is linear up-scaling complemented by non-linear sharpness enhancement, such as Luminance Transient Improvement (LTI). In this paper, three different two-dimensional (2D) implementations of the LTI algorithm are analyzed in terms of image quality and computational complexity. Results show that taking the local edge orientation into account is essential for obtaining high image quality. Furthermore, it is shown that the process of operating perpendicular to an edge can be replaced by a simplified alternative with a minimal loss of image quality.

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Jeroen A. P. Tegenbosch, Paul M. Hofman, and Marco K. Bosma "Improving nonlinear up-scaling by adapting to the local edge orientation", Proc. SPIE 5308, Visual Communications and Image Processing 2004, (18 January 2004); https://doi.org/10.1117/12.525714

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