Software A-D conversion method for digital vision chips

Shingo Kagami; Takashi Komuro; Hidenori Fujimura; Masatoshi Ishikawa

doi:10.3169/itej.57.385

Software A-D conversion method for digital vision chips

Shingo Kagami, Takashi Komuro, Hidenori Fujimura, Masatoshi Ishikawa

INF - System Information Sciences

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

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 language	English
Pages (from-to)	385-390
Number of pages	6
Journal	Kyokai Joho Imeji Zasshi/Journal of the Institute of Image Information and Television Engineers
Volume	57
Issue number	3
DOIs	https://doi.org/10.3169/itej.57.385
Publication status	Published - 2003

ASJC Scopus subject areas

Media Technology
Computer Science Applications
Electrical and Electronic Engineering

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AU - Komuro, Takashi

AU - Fujimura, Hidenori

AU - Ishikawa, Masatoshi

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AB - 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.

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