Use of Statistically Adaptive Accumulation to Improve Video Watermark Detection

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概要

• 論文の詳細を見る

• Redundant coding is a basic method of improving the reliability of detection and survivability after image processing. It embeds watermarks repeatedly in every frame or region and can thus prevent errors due to the accumulation of frames or regions during watermark detection. Redundant coding, however, is not always effective after image processing because the watermark signal may be attenuated by the accumulation procedure when image processing removes watermarks from specific frames or regions. We therefore propose a method of detection to prevent the attenuation of the watermark signal by accumulating a subset of the regions so that the accumulated region has a minimal bit-error rate, which is estimated from the region. Experimental evaluations using actual motion pictures have revealed that the new method can improve watermark survivability after MPEG encoding by an average of 15.7% and can widely be used in correlation-based watermarking.

著者

• Echizen Isao

  Systems Development Laboratory Hitachi Ltd.

• Tezuka Satoru

  Systems Development Laboratory Hitachi Ltd.

• Yamada Takaaki

  Systems Development Laboratory Hitachi Ltd.

• Fujii Yasuhiro

  Systems Development Laboratory Hitachi Ltd.

• Yoshiura Hiroshi

  Faculty of Electro-Communication, The University of Electro-Communications

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• Use of Statistically Adaptive Accumulation to Improve Video Watermark Detection

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