Development of real environment character string recognition method that can handle curved character strings

• Project/Area Number: 15K00258
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Perceptual information processing
• Research Institution: Sasebo National College of Technology
• Principal Investigator: SHIKU OSAMU 佐世保工業高等専門学校, 電子制御工学科, 教授 (00235516)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
• Keywords: 文字認識 / 文字正規化 / カメラ入力 / 傾斜文字 / 傾斜補正 / 単文字 / 文字列 / 傾き補正

Outline of Final Research Achievements

We developed a character normalization method for camera based character recognition. In this method, the character normalization process is executed for each character candidates extracted from images. The details are as follows. (1) a part of the character string is taken out as a substring. (2) rotation and shear normalization are applied for the substring. (3) characters are extracted from the normalized substring. (4) shear and size normalization are applied for the extracted characters. We tested the proposed method for many images. The results show that the proposed method is more accuracy than a conventional method.

Research Products

• [Journal Article] Character Normalization Method for Recognizing Slanted Characters (2017)
  • Author(s): 志久 修、手島 裕詞、内田 誠一
  • Journal Title: 電子情報通信学会論文誌D 情報・システム Volume: J100-D Issue: 10 Pages: 902-906
  • DOI: 10.14923/transinfj.2017JDL8007
  • ISSN: 1880-4535, 1881-0225
  • Year and Date: 2017-10-01
• [Journal Article] 点群データの特徴量抽出 (2016)
  • Author(s): 手島 裕詞、志久 修、金谷孝之、西尾 孝治、小堀 研一
  • Journal Title: 日本設計工学会誌 Volume: 52 Pages: 107-117
  • NAID: 130005125339
• [Presentation] Counting Algorithm for Sequential Optical Images of Immunoreactive Mouse Taste-Bud Cells (2016)
  • Author(s): Tateno K, Shiku O, Ohtubo Y
  • Organizer: 3rd International Conference on Computational Methods in Engineering and Health Sciences(ICCMEH- 2016)
  • Place of Presentation: Kitakyushu, Japan
  • Year and Date: 2016-12-18
  • Int'l Joint Research
• [Presentation] カメラ入力文字認識のための文字正規化方法 (2016)
  • Author(s): 志久修，手島 裕詞
  • Organizer: 電気学会九州支部沖縄支所講演会
  • Place of Presentation: 琉球大学
  • Year and Date: 2016-12-11
• [Presentation] 点群データを対象としたモルフォロジーフィルタの開発と検証 (2016)
  • Author(s): 手島裕詞，アタルサイハン・ガントゥグス，志久修，小堀研一
  • Organizer: 電気学会九州支部沖縄支所講演会
  • Place of Presentation: 琉球大学
  • Year and Date: 2016-12-11
• [Presentation] 点群データの欠損検出とその高速化 (2016)
  • Author(s): 中尾亮，手島裕詞，志久修 ，小堀研一
  • Organizer: 電気学会九州支部沖縄支所講演会
  • Place of Presentation: 琉球大学
  • Year and Date: 2016-12-11
• [Presentation] 2段階の正規化を用いた射影歪みを受けている文字列の認識 (2016)
  • Author(s): 志久修，林信吾，手島 裕詞
  • Organizer: 画像関連学会連合会第3回秋季大会, PC-10
  • Place of Presentation: 京都繊維大学
  • Year and Date: 2016-11-17
• [Presentation] 画像処理によるツシマヤマネコの識別の基礎研究 (2015)
  • Author(s): 日和 武、志久 修、手島 裕詞
  • Organizer: 第23回電子情報通信学会九州支部 学生会講演会
  • Place of Presentation: 福岡大学
  • Year and Date: 2015-09-04
• [Presentation] カメラで撮影した楽譜の認識 (2015)
  • Author(s): 山田 大輝、志久 修、手島 裕詞
  • Organizer: 第23回電子情報通信学会九州支部 学生会講演会
  • Place of Presentation: 福岡大学
  • Year and Date: 2015-09-04
• [Presentation] ボクセルモデルにおける高速な濃度計算の一検討 (2015)
  • Author(s): 池口 順基、手島 裕詞、志久 修
  • Organizer: 第23回電子情報通信学会九州支部 学生会講演会
  • Place of Presentation: 福岡大学
  • Year and Date: 2015-09-04