Foveated dynamic range of the pyramidal CMOS image sensors

Saffih F., Hornsey R. I.

IEEE Transactions on Electron Devices, vol.54, no.12, pp.3422-3425, 2007 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 54 Issue: 12
  • Publication Date: 2007
  • Doi Number: 10.1109/ted.2007.908892
  • Journal Name: IEEE Transactions on Electron Devices
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.3422-3425
  • Keywords: Active pixel sensor (APS), Classical CMOS imager, CMOS integrated circuits, Foveated imaging, Image processing, Pyramidal CMOS imager, Ring sampling
  • Istanbul Gelisim University Affiliated: No

Abstract

A novel intrascene dynamic range (DR) enhancement technique is proposed for pyramidal CMOS image sensors. The classic CMOS imager 1-D row sampling is replaced by a 2-D ring sampling, the vertical output buses by radial diagonal buses, and the raster scan with a bouncing scan. The result is a foveated DR enhancement mimicking biological vision. Experimental results validate the foveated DR enhancement of more than 50 dB on top of the imager intrinsic DR of 56.6 dB. The 32-ring (64 × 64 pixels) pyramidal CMOS imager is fabricated with dual-voltage (1.8 V, 3.3 V) standard 0.18-μ CMOS technology. © 2007 IEEE.