水中物体のビデオ映像によるコントラストの推定

• 中村 善彦

  東京水産大学

• 傅 恩波

  大連水産学院

• 秋山 早苗

  東京水産大学

書誌事項

タイトル別名

• Estimation of In-Water Image　Contrast Using Television Image from Video Taape

抄録

In the previous report, a method of estimating in-water image contrast using its black-and-white photograpf was revealed. The present study proposes a new method of estimation by using televised image from video tape. The televised image of a test board was captured by video-capture program and saved as file into memory unit of a computer. Using the Image 1.45 software, gray value of televised image was measured to estimate its contrast value Ci. From the relationship between contrast Ci and Cg. calculated from target and background gray values, a high correlation (r:0.95) was found. A relative equation between the Ci and the Cg was presented by the following equation : Ci=0.134 ln Cg+0.933. Using this formula, the application of the technique for small targets such as net set in a large sized water tank are discussed.

収録刊行物

• 日本水産工学会誌

  日本水産工学会誌 32 (2), 89-94, 1995

  日本水産工学会

キーワード

• コントラスト
• ビデオ映像
• 階調

詳細情報

• CRID: 1390282680840759168
• NII論文ID: 10008438616
• NII書誌ID: AN10278554
• DOI: 10.18903/fisheng.32.2_89
• ISSN: 21897131
• ISSN: 09167617
• Web Site: https://agriknowledge.affrc.go.jp/RN/2010660342
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • IRDB
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可