A novel adaptive logarithmic digital pixel sensor

Amine Bermak, Alistair Kitchen

Research output: Contribution to journalArticle

26 Citations (Scopus)


A major problem associated with complementary metal-oxide-semiconductor and charge couple device imagers is their limited dynamic range (DR), typically 60-70 dB. This falls far short of covering the wide illumination ranges found in natural scenes (typically 120-140 dB). Biological retinas are known to feature adaptive, logarithmic-type responses enabling them to cover a very wide DR, without compromising the resolution. This letter presents a novel way to realize such an adaptive logarithmic response by combining a digital time domain vision sensor and a simple adaptive digital quantizer. This letter presents the theory and experimental results for an adaptive logarithmic response sensor featuring over 100-dB DR.

Original languageEnglish
Pages (from-to)2147-2149
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number20
Publication statusPublished - 15 Oct 2006



  • Adaptive logarithmic pixel
  • Complementary metal-oxide-semiconductor (CMOS) image sensors
  • Digital pixel sensor (DPS)

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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