Title :
An analog implementation of early visual processing in insects
Author :
Moini, A. ; Bouzerdoum, A. ; Yakovleff, A. ; Abbott, D. ; Kim, O. ; Eshraghian, K. ; Bogner, R.E.
Author_Institution :
Dept. of Electr. & Electron. Engng., Adelaid Univ., SA, Australia
Abstract :
An analog VLSI implementation which mimics the early visual processing stages in insects is described. The system is composed of sixty parallel channels of integrated photodetectors and processing elements. It serves as the front end processor for a motion detection chip. The photodetection circuitry includes p-well junction diodes on a 2 mu m CMOS process and a logarithmic compression to increase the dynamic range of the system. The processing elements consist of an analog differentiator behind each photodetector. The differentiators are low frequency and have been designed using subthreshold design methods.
Keywords :
CMOS integrated circuits; VLSI; analogue processing circuits; differentiating circuits; image processing; motion estimation; photodetectors; 2 micron; CMOS process; analog differentiator; analogue VLSI implementation; image acquisition; image processing; insects; integrated photodetectors; logarithmic compression; motion detection chip; p-well junction diodes; subthreshold design methods; visual processing; CMOS process; Circuits; Design methodology; Diodes; Dynamic range; Frequency; Insects; Motion detection; Photodetectors; Very large scale integration;
Conference_Titel :
VLSI Technology, Systems, and Applications, 1993. Proceedings of Technical Papers. 1993 International Symposium on
Conference_Location :
Taipei, Taiwan
Print_ISBN :
0-7803-0978-2
DOI :
10.1109/VTSA.1993.263663
