NDLI: High dynamic range adaptation for ROI tracking based on reconfigurable concurrent dual-sensing

Content Provider	IET Digital Library
Author	Berni, J. Fernández Galán, R. Carmona Río, R. del Vázquez, Á. Rodríguez
Abstract	A single-exposure technique to extend the dynamic range of vision sensors is presented. It is particularly suitable for vision algorithms requiring region-of-interest (ROI) tracking under varying illumination conditions. The operation is supported by two intertwined photo-diodes at pixel level and two digital registers at the periphery of the pixel matrix. These registers divide the focal plane into independent regions within which automatic concurrent adjustment of the integration time takes place for each frame. At pixel level, one of the photodiodes senses the pixel value itself, whereas the other, in collaboration with its counterparts in every prescribed ROI, senses the mean illumination of that specific ROI. An additional circuitry interconnecting both photodiodes asynchronously determines the integration period for each ROI according to its mean illumination. The experimental results for a quarter video graphics array prototype CMOS vision sensor are reported.
Starting Page	1832
Ending Page	1834
Page Count	3
ISSN	00135194
Volume Number	50
e-ISSN	1350911X
Issue Number	Issue 24, Nov (2014)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/el/50/24
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/el.2014.3136
Journal	Electronics Letters
Publisher Date	2014-11-12
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	CMOS Image Sensor CMOS Integrated Circuit CMOS Vision Sensor Converto Digital Registers Focal Plane High Dynamic Range Adaptation Illumination Condition Image Detector Image Sonsor Intensifiers Intertwined PhotoDiode PhotoDiode Photoelectric Device Pixel Level Quarter Video Graphics Array Reconfigurable Concurrent Dual-sensing Region-of-interest Tracking
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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