Title :
A smart image sensor with high-speed feeble ID-beacon detection for augmented reality system
Author :
Oike, Yusuke ; Ikeda, Makoto ; Asada, Kunihiro
Author_Institution :
Dept. of Electron. Eng., Tokyo Univ., Japan
Abstract :
In this paper, we present a smart image sensor with high-speed feeble ID-beacon detection for an augmented reality (AR) system. AR systems are designed to provide an enhanced view of the real world with meaningful information from a computer. Our target AR system uses an optical device with ID beacon such as a blinking LED. Our sensor architecture realizes analog readout for 2-D image capture and high-speed digital readout for ID beacon detection simultaneously. The pixel circuit has a logarithmic-response photo detector and an adaptive modulation amplifier to detect a feeble ID beacon in wide range of background illumination. A 128 /spl times/ 128 smart sensor has been developed and successfully tested. It achieves 4850 bit/IC/spl middot/sec using 40 kHz carrier and < -10.0 dB signal-to-background ratio (SBR) in > 40 dB background illumination for robust ID-beacon detection.
Keywords :
LED displays; active vision; augmented reality; image resolution; image sensors; image texture; photodetectors; readout electronics; 128 pixels; 2-D image capture; 40 kHz; AR systems; ID beacon detection; adaptive modulation amplifier; analog readout; augmented reality system; background illumination; blinking LED; feeble ID beacon; high-speed digital readout; high-speed feeble ID-beacon detection; logarithmic-response photo detector; optical device; pixel circuit; real world enhanced view; robust ID-beacon detection; sensor architecture; smart image sensor; Augmented reality; Circuits; Computer architecture; Detectors; Image sensors; Intelligent sensors; Light emitting diodes; Lighting; Optical amplifiers; Optical devices;
Conference_Titel :
Solid-State Circuits Conference, 2003. ESSCIRC '03. Proceedings of the 29th European
Conference_Location :
Estoril, Portugal
Print_ISBN :
0-7803-7995-0
DOI :
10.1109/ESSCIRC.2003.1257088
