The effect of reduced color depth on the color reproduction of web images

Bilissi, Efthimia, Jacobson, Ralph E. and Attridge, Geoffrey G. (2002) The effect of reduced color depth on the color reproduction of web images. In: PICS 2002: IS&T's PICS Conference, an International Technical Conference on Digital Image Capture and Associated System, Reproduction and Image Quality Technologies. Society for Imaging Science and Technology, Portland, USA, pp. 70-75. ISBN 0892082380

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Accurate color reproduction of images viewed across the Internet can be a difficult task due to problems,which include variable viewing conditions.The standard RGB color space (sRGB)has been proposed to overcome this problem without the need for special software applications. Different graphics adapter bit-depth settings also affect the number of displayable colors on a web browser.For this reason,the 216 colors "web safe" palette has been introduced. To understand the effect of device characteristics on the process of image reproduction via the web,the characterization of some common devices was carried out. This created a controlled environment whereby experiments could be conducted with reproducible results.Device characterization also enabled the accurate conversion of scanned images to sRGB by using a step-by-step process that followed the specification of the color space. The investigation of color reproduction on a Cathode Ray Tube (CRT)display under different bit-depth settings has been conducted using a suitable test target,which was converted to the sRGB color space and also to the "web safe"(216 colors)palette.These two images were displayed under the 8-bit and 24-bit depth settings of the graphics card adaptor. Colorimetric measurements concerning color differences were performed and evaluated.Experimental investigation on the true color (24-bit color depth)image while displayed under 8-bit setting via different browsers followed.The outcome of the investigations was evaluated and combined to determine the relationship between the different parameters described above and their effect on image quality.

Item Type: Book Section
Subjects: University of Westminster > Media, Arts and Design
University of Westminster > Science and Technology > Electronics and Computer Science, School of (No longer in use)
Depositing User: Miss Nina Watts
Date Deposited: 05 May 2006
Last Modified: 07 Jun 2010 13:31

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