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Tiled display systems are widely utilized for digital signage application exceeding the size of a single flat-panel display. Smoothly varying spatial non-uniformity in luminance and color may cause visible difference in the boundary of two adjacent sub-displays. It is necessary to suppress such visible artifacts. Tiled display systems can be installed under various illumination environments and require routine color calibration to compensate for temporal change in display characteristics. This paper presents a simple and cost-effective color calibration method for tiled display systems. Consumerlevel digital camera is utilized as a measuring device after the proposed vignetting correction was applied. Experimental results indicate that the proposed color calibration method for tiled display system is quite effective in suppressing the visible artifacts across two adjacent sub-displays.

See-through capability is an important performance indicator of transparent display. The visibility of the background is affected by the transmittance factor, haze, distance between the transparent display and an object in the background, and the illuminance . In this paper, the perceived see-through level (PSL) is proposed to represent the degree of visibility of the background. The PSL is determined by considering both transmittance factor and haze. Experimental results indicate that the proposed PSL effectively describes the visibility of the background behind the transparent displays.

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