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Proceedings Paper

Log polar image sensor in CMOS technology
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Paper Abstract

We report on the design, design issues, fabrication and performance of a log-polar CMOS image sensor. The sensor is developed for the use in a videophone system for deaf and hearing impaired people, who are not capable of communicating through a 'normal' telephone. The system allows 15 detailed images per second to be transmitted over existing telephone lines. This framerate is sufficient for conversations by means of sign language or lip reading. The pixel array of the sensor consists of 76 concentric circles with (up to) 128 pixels per circle, in total 8013 pixels. The interior pixels have a pitch of 14 micrometers, up to 250 micrometers at the border. The 8013-pixels image is mapped (log-polar transformation) in a X-Y addressable 76 by 128 array.

Paper Details

Date Published: 21 August 1996
PDF: 10 pages
Proc. SPIE 2784, Vision Systems: Sensors, Sensor Systems, and Components, (21 August 1996); doi: 10.1117/12.248520
Show Author Affiliations
Danny Scheffer, IMEC (Belgium)
Bart Dierickx, IMEC (Belgium)
Fernando Pardo, IMEC (Belgium)
Jan Vlummens, IMEC (Belgium)
Guy Meynants, IMEC (Belgium)
Lou Hermans, IMEC (Belgium)

Published in SPIE Proceedings Vol. 2784:
Vision Systems: Sensors, Sensor Systems, and Components
Otmar Loffeld, Editor(s)

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