A CMOS IMAGER WITH ON-CHIP VARIABLE RESOLUTION FOR LIGHT ADAPTIVE IMAGING Zhimin Zhou, Student Member, Bedabrata Pain, Member, and Eric R. Fossum*, Senior Member, IEEE Center for Space Microelectronics Technology Jet Propulsion Laboratory, MS 300-315 California Institute of Technology 4800 Oak Grove Drive, Pasadena, CA 91109 * Photobit LLC. 2529 Foothill Blvd., Suite 104 La Crescents,CA91214 Contact: Tel. 818-354-8765 Fax 818-393-0045 E-mail zhou(i?jicsl.ucla.edu ABSTRACT A variable resolution CMOS active pixel image sensor that enhances WIN ratio at low illumination level is presented. It features column-parallel circuits for signal summation from kernels of programmable size. The 128x128 prototype array consumes only 24 nlW at 125 frames/see. and demonstrates more than 10 dB S/N enhancement for 2 x 8 kernel summation. Fixed pattern noise is less than 0.5’XO of the full well signal.