Smart CMOS image sensor with high SBR and subpixel resolution for light-section-based range finding

Jimin Cheon, Youngcheol Chae, Dongsoo Kim, Seunghyun Lim, Inhee Lee, Hyoung Ki Lee, Dong Jo Kim, Gunhee Han

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Light-section (LS)-based range finders are commonly used for obstacle recognition in home service robots and autonomous vehicles. This paper proposes a smart CMOS image sensor for LS-based range finding. The proposed sensor can detect the laser light, even under very strong ambient-illumination levels by using a multiple-capture frame-correlated double sampling (F-CDS), which is realized with an inverter-based switched-capacitor F-CDS accumulator. The proposed sensor also includes on-chip winner-take-all circuits that significantly reduce the software and hardware complexity of interpolation for the subpixel resolution. The prototype chip was fabricated using a 0.35-μm CMOS process. The measurement results show that the proposed sensor can detect a laser line with an intensity that is 56.5 dB lower than that of the ambient illumination, providing a spatial resolution of ±0.16 pixels.

Original languageEnglish
Pages (from-to)2546-2555
Number of pages10
JournalIEEE Transactions on Electron Devices
Volume56
Issue number11
DOIs
Publication statusPublished - 2009

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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