Error diffusion applied to the manipulation of liquid-crystal display subpixels

William J. Dallas; Jiahua Fan; Hans Roehrig; Elizabeth A. Krupinski

doi:10.1117/12.535488

5 May 2004 Error diffusion applied to the manipulation of liquid-crystal display subpixels

William J. Dallas, Jiahua Fan, Hans Roehrig, Elizabeth A. Krupinski

Proceedings Volume 5367, Medical Imaging 2004: Visualization, Image-Guided Procedures, and Display; (2004) https://doi.org/10.1117/12.535488
Event: Medical Imaging 2004, 2004, San Diego, California, United States

Abstract

Flat-panel displays based on liquid crystal technology are becoming widely used in the medical imaging arena. Despite the impressive capabilities of presently-existing panels, some medical images push their boundaries. We are working with mammograms that contain up to 4800 x 6400 14-bit pixels. Stated differently, these images contain 30 mega-pixels each. In the standard environment, for film viewing, the mammograms are hung four-up, i.e. four images are located side by side. Because many of the LCD panels used for monochrome display of medical images are based on color models, the pixels of the panels are divided into sub-pixels. These sub-pixels vary in their numbers and in the degrees of independence. Manufacturers have used both spatial and temporal modulation of these sub-pixels to improve the quality of images presented by the monitors. In this presentation we show how the sub-pixel structure of some present and future displays can be used to attain higher spatial resolution than the full-pixel resolution specification would suggest while also providing increased contrast resolution. The error diffusion methods we discuss provide a natural way of controlling sub-pixels and implementing trade-offs. In smooth regions of the image contrast resolution can maximized. In rapidly-varying regions of the image spatial resolution can be favored.

Citation Download Citation

William J. Dallas, Jiahua Fan, Hans Roehrig, and Elizabeth A. Krupinski "Error diffusion applied to the manipulation of liquid-crystal display subpixels", Proc. SPIE 5367, Medical Imaging 2004: Visualization, Image-Guided Procedures, and Display, (5 May 2004); https://doi.org/10.1117/12.535488

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KEYWORDS

LCDs

Diffusion

Mammography

Spatial resolution

Medical imaging

Modulation

Liquid crystals

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