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A 1Kx1K high dynamic range CMOS image sensor with on-chip programmable region of interest readout

: Schrey, O.; Huppertz, J.; Filimonovic, G.; Bußmann, A.; Brockherde, W.; Hosticka, B.J.

Dielacher, F.; Grünbacher, H.:
ESSCIRC 2001. Proceedings of the 27th European Solid-State Circuits Conference
Gif-sur-Yvette: Editions Frontieres, 2001
ISBN: 2-914601-00-X
European Solid State Circuits Conference (ESSCIRC) <27, 2001, Villach>
Conference Paper
Fraunhofer IMS ()
Regionauslese; hohe Bilddynamik; Megapixelsensor; Programmierumgebung; CMOS; Bildsensor

An integrated 1024x1024 CMOS image sensor with programmable region of interest (ROI) readout and multi-exposure technique has been developed and successfully tested. Size and position of the ROI is programmed based on multiples of a minimum readout kernel of 32x32 pixels. Since the dynamic range of the irradiance normally exceeds the electrical dynamic range of the imager that can be covered using a single integration time a multi exposure technique has been implemented in the imager. Subsequent sensor images are acquired using different integration times and recomputed to form a single composite image. A newly developed algorithm performing the recomputation is presented. The chip has been realized in a 0.5µm n-well standard CMOS process. The pixel pitch is 10µm x 10µm and the total chip area is 164mm².