Software A-D conversion method for digital vision chips

Shingo Kagami, Takashi Komuro, Hidenori Fujimura, Masatoshi Ishikawa

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


A pixel-level analog-to-digital (A-D) conversion method suitable for digital vision chips is proposed. In this method, each quantization boundary is compared by determining whether the signal level integrated for a certain time has reached a certain voltage, where both the time and voltage are properly controlled by software for each boundary. We derive an algorithm to generate an optimal controlling schedule to realize an arbitrary A-D conversion scale subject to the condition that noise is minimized. Experimental results have shown that images with given A-D characteristics can be obtained with low noise.

Original languageEnglish
Pages (from-to)385-390
Number of pages6
JournalKyokai Joho Imeji Zasshi/Journal of the Institute of Image Information and Television Engineers
Issue number3
Publication statusPublished - 2003
Externally publishedYes

ASJC Scopus subject areas

  • Media Technology
  • Computer Science Applications
  • Electrical and Electronic Engineering


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