Title :
An all CMOS foveal image sensor chip
Author :
Xia, Shu ; Sridhar, Ramalingam ; Scott, Peter ; Bandera, Cesar
Author_Institution :
State Univ. of New York, Buffalo, NY, USA
Abstract :
A foveal image sensor chip that uses a standard CMOS process is presented. A new photo charge normalization scheme and its associated circuitry for use with active pixel sensors has been developed. The pixels are assembled into a multi-resolution rectilinear foveal image sensor chip using a novel access scheme to reduce the number of analog RAM cells needed. Localized spatial resolution declines monotonically with offset from the imager´s optical axis, analogous to biological foveal vision. A proof-of-concept chip has been fabricated and tested
Keywords :
CMOS image sensors; analogue storage; integrated circuit design; random-access storage; timing; CMOS image sensor chip; active pixel sensors; analog RAM cells; foveal image sensor; localized spatial resolution; multi-resolution rectilinear image sensor; optical axis; photo charge normalization scheme; proof-of-concept chip; Assembly; Biomedical optical imaging; Biosensors; CMOS image sensors; CMOS process; Circuits; Image sensors; Optical sensors; Pixel; Spatial resolution;
Conference_Titel :
ASIC Conference 1998. Proceedings. Eleventh Annual IEEE International
Conference_Location :
Rochester, NY
Print_ISBN :
0-7803-4980-6
DOI :
10.1109/ASIC.1998.723085
