TY - JOUR 
A1 - Martínez Sánchez, Antonio
AU - Fernández, Carlos
AU - Navarro Lorente, Pedro Javier
AU - Iborra García, Andrés José
T1 - A Novel Method to Increase LinLog CMOS Sensors’ Performance in High Dynamic Range Scenarios
Y1 - 2011
SN - 1424-8220
UR - http://hdl.handle.net/10317/5143
AB - Images from high dynamic range (HDR) scenes must be obtained with minimum loss of information. For this purpose it is necessary to take full advantage of the
quantification levels provided by the CCD/CMOS image sensor. LinLog CMOS sensors
satisfy the above demand by offering an adjustable response curve that combines linear and logarithmic responses. This paper presents a novel method to quickly adjust the parameters that control the response curve of a LinLog CMOS image sensor. We propose to use an Adaptive Proportional-Integral-Derivative  controller to adjust the exposure time of the sensor, together with control algorithms based on the saturation level and the entropy of the images. With this method the sensor’s maximum dynamic range (120 dB) can be used to acquire good quality images from HDR scenes with fast, automatic adaptation to scene conditions. Adaptation to a new scene is rapid, with a sensor response adjustment of less than eight frames when working in real time video mode. At least 67% of the scene entropy can be retained with this method.
KW - Teoría de la Señal y las Comunicaciones
KW - Image sensors
KW - Sensores de imagen
KW - Outdoor vision
KW - Visión exterior
KW - HDR imaging
KW - Imágenes HDR
LA - eng
PB - Sensors ISSN 1424-8220
ER -