On pixel detection threshold in the gigavision camera

Recently, we have proposed a new image device called gigavision camera whose most important characteristic is that pixels have binary response. The response function of a gigavision sensor is non-linear and similar to a logarithmic function, which makes the camera suitable for high dynamic range imaging. One important parameter in the gigavision camera is the threshold for generating binary pixels. Threshold T relates to the number of photo-electrons necessary for the pixel output to switch from "0" to "1". In this paper, a theoretical analysis of the threshold influence in the gigavision camera is given. If the threshold in the gigavision sensor is large, there will be a "dead zone" in the response function of a gigavision sensor. A method of adding artificial light is proposed to solve the "dead zone" problem. Through theoretical analysis and experimental results based on synthesized images, we show that for high light intensity, the gigavisio...

• Type: Conference
• Year: 2010
• Where: DPHOTO
• Authors: Feng Yang, Luciano Sbaiz, Edoardo Charbon, Sabine Süsstrunk, Martin Vetterli
• Keywords: DPHOTO 2010, Gigavision Camera, Gigavision Sensor, Hardware, Response Function