A 1 K×1 K high dynamic range CMOS image sensor with on-chipprogrammable region-of-interest readout

摘要

An integrated 1024×1024 CMOS image sensor with programmablenregion-of-interest (ROI) readout and multiexposure technique has beenndeveloped and successfully tested. Size and position of the ROI isnprogrammed based on multiples of a minimum readout kernel of 32×32npixels. Since the dynamic range of the irradiance normally exceeds thenelectrical dynamic range of the imager that can be covered using ansingle integration time, a multiexposure technique has been implementednin the imager. Subsequent sensor images are acquired using differentnintegration times and recomputed to form a single composite image. Annewly developed algorithm performing the recomputation is presented. Thenchip has been realized in a 0.5-Μm n-well standard CMOS process. Thenpixel pitch is 10 Μm2 and the total chip area is 164 mmn2