TY - GEN
T1 - An adaptive CMOS imager with time-based compressive active-pixel response
AU - Kucher, Paul
AU - Chakrabartty, Shantanu
PY - 2006
Y1 - 2006
N2 - This paper presents an alternative to a logarithmic response CMOS imager that utilizes an in-pixel, time-based compressive map for capturing scenes with wide dynamic range. The imager employs a correlated double sampling technique that significantly reduces the effects of parasitic capacitance and mismatch in active-pixel circuits. An on-line adaptation technique that adjusts the parameter of the compressive map compensates for variable illumination conditions across different scenes, achieving large dynamic range. The proposed pixel architecture and algorithm have been implemented with relatively few transistors and with a fill factor of 17%. An imager consisting of an array of 110 × 80 pixels has been designed and fabricated using a 0.5 μm CMOS process. Simulation and preliminary testing results demonstrate the functionality of the imager to adapt its response under different illumination conditions.
AB - This paper presents an alternative to a logarithmic response CMOS imager that utilizes an in-pixel, time-based compressive map for capturing scenes with wide dynamic range. The imager employs a correlated double sampling technique that significantly reduces the effects of parasitic capacitance and mismatch in active-pixel circuits. An on-line adaptation technique that adjusts the parameter of the compressive map compensates for variable illumination conditions across different scenes, achieving large dynamic range. The proposed pixel architecture and algorithm have been implemented with relatively few transistors and with a fill factor of 17%. An imager consisting of an array of 110 × 80 pixels has been designed and fabricated using a 0.5 μm CMOS process. Simulation and preliminary testing results demonstrate the functionality of the imager to adapt its response under different illumination conditions.
UR - http://www.scopus.com/inward/record.url?scp=34547315814&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:34547315814
SN - 0780393902
SN - 9780780393905
T3 - Proceedings - IEEE International Symposium on Circuits and Systems
SP - 205
EP - 208
BT - ISCAS 2006
T2 - ISCAS 2006: 2006 IEEE International Symposium on Circuits and Systems
Y2 - 21 May 2006 through 24 May 2006
ER -