Wide Dynamic Range Silicon Retina with Photodiode Capacitance Modulation

• Shimonomura Kazuhiro

  College of Science and Technology, Ritsumeikan University

• Yagi Tetsuya

  Graduate School of Engineering, Osaka University

Bibliographic Information

Other Title

• イメージセンシング技術とその応用　　蓄積容量変調による広ダイナミックレンジシリコン網膜
• 蓄積容量変調による広ダイナミックレンジシリコン網膜
• チクセキ ヨウリョウ ヘンチョウ ニ ヨル コウダイナミックレンジシリコン モウマク

Abstract

We describe an intelligent vision sensor (silicon retina) that can pre-process images in real-time by using a parallel analog circuit that mimics the structure of the neuronal circuits in vertebrate retina. In this study, we have designed and fabricated a wide dynamic range silicon retina on the basis of our previous design. The photosensor of the present chip approximates logarithmic illumination-to-voltage transfer characteristics due to a photodiode capacitance modulation technique being applied. The chip in this study has achieved a dynamic range wide enough to perceive objects in both indoor and outdoor environments. Moreover, combining the logarithmic response of the photosensor with the Laplacian-Gaussian-like spatial filtering by a resistive network makes the response amplitude of the chip independent of the illumination intensity.

Journal

• The Journal of The Institute of Image Information and Television Engineers

  The Journal of The Institute of Image Information and Television Engineers 64 (3), 358-364, 2010

  The Institute of Image Information and Television Engineers

Keywords

• 広ダイナミックレンジ
• 蓄積容量変調
• 対数応答
• CMOSイメージセンサ
• シリコン網膜
• ∇²<i>G</i>フィルタ

Details

• CRID: 1390282680074874624
• NII Article ID: 10025988667
• NII Book ID: AN10588970
• DOI: 10.3169/itej.64.358
• ISSN: 18816908
• ISSN: 13426907
• NDL BIB ID: 10610166
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I10610166
• Web Site: http://www.jstage.jst.go.jp/article/itej/64/3/64_3_358/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed