Contrast Enhancement of Multi-Displays Using Human Contrast Sensitivity

Study of contrast sensitivity of the human eye shows that we are more sensitive to brightness differences at low intensity levels than at high intensity levels. We apply this fact effectively to achieve brightness seamlessness in multi-projector displays. Multi-displays, popularly made of a rectangular array of partially overlapping projectors, show severe spatial variation in brightness. Existing methods achieve brightness uniformity across the display by matching the brightness response of every pixel to the pixel with the most limited contrast leading to severe compression in the contrast of the display. In this paper, we propose a method that allows a constrained variation in brightness guided by the human contrast sensitivity function such that it is imperceptible to the human eye and this achieves seamless multidisplay. At the same time, such a constrained smoothing of the brightness leads to dramatic improvement in the contrast of the display making it practically usable.

• Type: Conference
• Year: 2005
• Where: CVPR
• Authors: Aditi Majumder
• Keywords: Brightness Differences, Brightness Response, Brightness Seamlessness, Computer Vision, CVPR 2005, Human Contrast Sensitivity, Methods Achieve Brightness