Digital Watermarking Method Preventing Extraction Error Caused by Transformation from Uniform Color Space to RGB Color Space

• IWATA Motoi

  Graduate School of Engineering, Osaka Prefecture University

• EGUCHI Kenta

  Graduate School of Engineering, Osaka Prefecture University

• KISE Koichi

  Graduate School of Engineering, Osaka Prefecture University

Bibliographic Information

Other Title

• 均等色空間からRGB表色系への変換に起因する抽出誤りを防止した電子透かし法
• キントウショク クウカン カラ RGB ヒョウショクケイ エ ノ ヘンカン ニ キイン スル チュウシュツ アヤマリ オ ボウシ シタ デンシ スカシ ホウ

Abstract

Uniform color space is a color space matching with human visual system. Therefore many digital watermarking method employed it. However, watermark bits are not always correctly extracted if the RGB values transformed from uniform color space are adjusted to integer values by rounded-up although this procedure is often employed. It is because the transformation from uniform color space to RGB color space is non-linear. The proposed method solves this problem by using color transformation table. Moreover, the proposed method improves processing speed by changing search procedure and dividing color transformation table appropriately. Experimental results clarify the problem of existing methods and the performance of the proposed method.

Journal

• NIHON GAZO GAKKAISHI (Journal of the Imaging Society of Japan)

  NIHON GAZO GAKKAISHI (Journal of the Imaging Society of Japan) 54 (4), 284-291, 2015

  The Imaging Society of Japan

Keywords

• Digital watermarking
• Uniform color space
• L^*a^*b^* color space

Details

• CRID: 1390282679073775488
• NII Article ID: 130005092035
• NII Book ID: AA1137305X
• DOI: 10.11370/isj.54.284
• ISSN: 18804675
• ISSN: 13444425
• NDL BIB ID: 026679937
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I026679937
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed