Saturday 23rd of September 2017
 

Time Course of Chromatic Adaptation to Outdoor LED Displays


Mohamed Abdellatif, Mohamed Y. Elnahas, Hassan Farahat and Ali Rashed

The chromatic adaptation process for the colors displayed on an outdoor LED Display follows two intermediate stages in its path to reach steady-state. In this paper, we investigate the tuning of system parameters in the MACCLED (Mixed Adaptive Color Correction) system in order to insure better color generation while the observer HVS is in transient state. The performance of the system is then analyzed through conducting a series of psychophysical visual experiments in different environmental ambient setup. The resulting z-score of each ambient condition is then compared to select the optimum system parameters adjusting.

Keywords: LED display, MACCLED, color appearance, ambient lighting, chromatic adaptation, incomplete adaptation, mixed adaptation.

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ABOUT THE AUTHORS

Mohamed Abdellatif
Mohamed Abdellatif received the B.S. , M.S. and Ph.D. degrees in Computer and Systems Engineering from Faculty of Engineering, Al Azhar University, Egypt. He has worked as a lecturer in same university since 1999. His research interests are LED displays, color image processing, human visual system and computer vision.

Mohamed Y. Elnahas
Professor Computer and System Engineering Dept., Al Azhar University Nasr City, Cairo, Egypt

Hassan Farahat
Professor Computer and System Engineering Dept., Al Azhar University Nasr City, Cairo, Egypt

Ali Rashed
Professor Computer and System Engineering Dept., Al Azhar University Nasr City, Cairo, Egypt


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