A Novel Method to Increase LinLog CMOS Sensors’ Performance in High Dynamic Range Scenarios
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Martínez Sánchez, Antonio; Fernández, Carlos; Navarro Lorente, Pedro Javier; Iborra García, Andrés JoséÁrea de conocimiento
Teoría de la Señal y las ComunicacionesPatrocinadores
The work was carried out as part of the projects EXPLORE (TIN2009-08572) and SiLASVer (TRACE PET 2008-0131) funded by the Spanish National R&D&I Plan. It has also received funding from the Government of the Region of Murcia (Séneca Foundation)Fecha de publicación
2011-08Editorial
Sensors ISSN 1424-8220Cita bibliográfica
Martínez-Sánchez, A., Fernández, C., Navarro, P. J., & Iborra, A. (2011). A novel method to increase LinLog CMOS sensors’ performance in high dynamic range scenarios. Sensors, 11(9), 8412-8429.Revisión por pares
SíPalabras clave
Image sensorsSensores de imagen
Outdoor vision
Visión exterior
HDR imaging
Imágenes HDR
Resumen
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 ...
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