Image Enhancement of cloth stain for forensic science

• Project/Area Number: 25330211
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Perceptual information processing
• Research Institution: Ryukoku University
• Principal Investigator: FUJITA Kazuhiro 龍谷大学, 理工学部, 教授 (90209049)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000); Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
• Keywords: スパースコーディング / 独立成分分析 / 近紫外LED / 近紫外LED光源 / 主成分分析 / 布の付着物

Outline of Final Research Achievements

The purpose of this study is to enhance the cloth stain by processing the images which are obtained under the white LED light and/or the black LED light.
Reducing the texture components is performed by evaluating the error image between the observed images and the image approximated by the sparse coding method. The sparse coding method is applied to the block images whose block size is determined based on the period of the texture component. The cube of the error between the processed image obtained under the white LED and the processed image obtained under the black LED are made to be uncorrelated by using the PCA ( Principle Component Analysis ) method, then the above result are made to be independent by using the ICA ( Independent Component Analysis ) method in which the independence is evaluated by the product of the kurtosis of the each components. The results of the computer experiments show the effectiveness of this method.

Research Products

• [Presentation] 布の付着物の鮮明化画像処理 (2015)
  • Author(s): 伊藤良太，桶谷新也，藤田和弘
  • Organizer: 日本法科学技術学会第21回学術集会
  • Place of Presentation: 柏の葉カンファレンスセンター
  • Year and Date: 2015-11-12
• [Presentation] ICAを用いた布の汚れの鮮明化画像処理 (2015)
  • Author(s): 伊藤良太，桶谷新也，藤田和弘
  • Organizer: 第14回情報科学技術フォーラム
  • Place of Presentation: 愛媛大学
  • Year and Date: 2015-09-15
• [Presentation] 衣類への付着物の鮮明化画像処理 (2014)
  • Author(s): 藤田和弘，桶谷新也
  • Organizer: 日本法科学技術学会 第20回学術集会
  • Place of Presentation: ホテルフロラシオン青山(東京都)
  • Year and Date: 2014-11-13 – 2014-11-14
• [Presentation] 衣類への付着物の鮮明化画像処理 (2013)
  • Author(s): 藤田和弘，桶谷新也，中森伸行
  • Organizer: 日本法科学技術学会第19回学術集会
  • Place of Presentation: ホテルフロラシオン青山(東京都)
• [Remarks] 布の汚れの鮮明化画像処理
  • URL: http://imagelab.jp/cloth_stain_2016Mar/cloth/