Journal ArticleDOI
A 256/spl times/256 CMOS imaging array with wide dynamic range pixels and column-parallel digital output
S.J. Decker,D. McGrath,K. Brehmer,Charles G. Sodini +3 more
- Vol. 33, Iss: 12, pp 2081-2091
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TLDR
A 256x256 CMOS active pixel sensor (APS) is described for an automotive stereo-vision system that simultaneously provides flexibility, user-adjustability, and digital control, with no reduction of fill factor.Abstract:
A 256x256 CMOS active pixel sensor (APS) is described for an automotive stereo-vision system. Illumination may vary over several orders of magnitude, requiring a high dynamic range imager. Dynamic range is increased 20/spl times/ using a special clocking scheme for the lateral overflow gate. This dynamic range enhancement offers improvements over previously-described techniques. It simultaneously provides flexibility, user-adjustability, and digital control, with no reduction of fill factor. On-chip column-parallel cyclic analog-to-digital converters (ADCs) produce digital output at frame rates from 30 to 390 frames/s.read more
Citations
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Journal ArticleDOI
A CMOS smart pixel for active 3-D vision applications
TL;DR: In this article, a CMOS smart pixel aimed at three-dimensional vision applications is introduced, which is suitable for scannerless laser ranging systems which employ the indirect time-of-flight measuring technique to recover distance information.
Journal ArticleDOI
A CMOS image sensor with programmable pixel-level analog processing
TL;DR: A prototype of a 34 /spl times/ 34 pixel image sensor, implementing real-time analog image processing, is presented, and its dynamic range can be extended up to 96 dB using the double-sampling technique.
Patent
Circuit and method for cancellation of column pattern noise in CMOS imagers
Hae-Seung Lee,Fife Keith G +1 more
TL;DR: In this article, the authors measure the output voltage of a CMOS pixel in a manner that substantially reduces all columnar pattern noise due to mismatches in the signal processing circuits including the correlated double sampling amplifiers and A/D converters.
Patent
Driven capacitor storage pixel sensor and array
TL;DR: In this article, a storage pixel sensor comprises a photosensor selectively connectable to a reset potential; a switched buffer amplifier having a control terminal coupled to the photosensor, a first terminal connected to a source of a transfer signal, and a second terminal; a storage capacitor coupled to said second terminal.
Patent
System and method for processing non-linear image data from a digital imager
TL;DR: In this article, the effects of single pixel defects in the imager are eliminated by clamping a predetermined pixel of image data within the window when the value of the predetermined pixel is greater than a maximum value of neighboring pixels or less than a minimum value of neighbouring pixels.
References
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Charge Transfer Devices
TL;DR: It is projected that charge transfer devices will rapidly find their way into certain analog delay, image sensing, and digital applications.
Journal ArticleDOI
256/spl times/256 CMOS active pixel sensor camera-on-a-chip
TL;DR: In this paper, an active pixel sensor (APS) is integrated on a CMOS chip with the timing and control circuits, and signal conditioning to enable random access, low power (/spl sim/5 mW) operation, and low read noise (13 e/sup -/ rms).