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J-GLOBAL ID：200901038991111846   Update date: Mar. 22, 2024

Keita Ashizawa

アシザワ ケイタ | Keita Ashizawa
Affiliation and department：
Shizuoka Institute of Science and Technology Faculty of Informatics Department of Computer Science

About Shizuoka Institute of Science and Technology Faculty of Informatics Department of Computer Science


Homepage URL  (1)： http://asssy.sakura.ne.jp/
Research field  (3)： Applied mathematics and statistics ,  Basic mathematics ,  Perceptual information processing
Research keywords  (4)： 画像情報処理 ,  画像圧縮 ,  ウェーブレット解析 ,  応用数学
Research theme for competitive and other funds  (2)：
  • 2021 - 2024 空撮画像や点群データのための可逆圧縮方式の開発
  • 2017 - 2019 点列データの相関を利用した効率的な信号圧縮法の開発
Papers (16)：
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MISC (17)：
  • 森田雅貴, 芦澤恵太, 山谷克. Edge Direction Prediction by Principal Component Analysis of Gradient Data and Its Application to Image Compression. 画像電子学会年次大会予稿集(CD-ROM). 2022. 50th
  • Kensuke Fujinoki, Keita Ashizawa. Directional Lifting Wavelet Transform for Image Edge Analysis. 2021
  • 藤ノ木健介, 芦澤恵太. 重複ウェーブレット変換と画像処理への応用. 統計数理研究所共同研究リポー ト「複雑系の逆問題とその周辺」. 2017. 1-10
  • Ashizawa Keita, Harada Takuya, Yamatani Katsu. A Block-based Lossy Image Compression Using The Wavelet Transform (Wavelet analysis and signal processing). RIMS Kokyuroku. 2016. 2001. 83-94
  • 芦澤恵太, 森田雅貴. DCTとウェーブレット変換を縦横に組み合わせた直交変換をブロック毎に用いる適応的画像圧縮法. 平成28年度数学協働プログラム:ウェーブレット理論と工学への応用. 2016. 15-27
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Lectures and oral presentations  (15)：
  • 離散ウェーブレット変換係数の線形量子化の拡張と圧縮画像への効果について
    (日本応用数理学会 第20回研究部会連合発表会 2024)
  • 遷移域を有する階段関数によるDWT係数量子化とその圧縮画像への影響
    (画像電子学会第307回研究会 2024)
  • A new pre-coding approach for MPROT based image compression
    (The 42nd JSST Annual International Conference on Simulation Technology (JSST2023) 2023)
  • Edge enhancement with directional wavelet transform
    (The 42nd JSST Annual International Conference on Simulation Technology (JSST2023) 2023)
  • Improvement of Coding Procedures for Haar Transform-based Lossy Image Compression
    (The 10th International Congress on Industrial and Applied Mathematics (ICIAM 2023) 2023)
ｍore...
Education (3)：
  • 2003 - 2006 Shizuoka University Graduate School of Science and Engineering
  • 2001 - 2003 Shizuoka University Graduate School of Science and Engineering
  • 1997 - 2001 Shizuoka University Faculty of Engineering Department of Systems Engineering
Professional career (1)：
  • 博士(理学) (静岡大学)
Work history (8)：
  • 2023/04 - 現在 Shizuoka Institute of Science and Technology Faculty of Informatics Department of Computer Science
  • 2019/04 - 2023/03 Maizuru National College of Technology Department of Electrical and Computer Engineering
  • 2013/04 - 2019/03 Maizuru National College of Technology Department of Electrical and Computer Engineering
  • 2016/08 - 2017/03 Meijo University Faculty of Urban Science
  • 2011/01 - 2013/03 Maizuru National College of Technology Department of Electrical and Computer Engineering
Show all
Association Membership(s) (3)：
THE JAPAN SOCIETY FOR INDUSTRIAL AND APPLIED MATHEMATICS ,  THE INSTITUTE OF IMAGE INFORMATION AND TELEVISION ENGINEERS ,  THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS
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