A Verification Method for a Digital Image File Using a Discrete Wavelet Transform

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  • ウェーブレット変換を用いた画像の照合法
  • ウェーブレット ヘンカン オ モチイタ ガゾウ ノ ショウゴウホウ

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Abstract

Recently, several digital watermarking techniques have been proposed for hiding data, such as the copy right information, in a frequency domain of image signals to protect the copy right of the content. However, in order to detect a watermarking sufficiently after heavy compression, the quality on an image might be visibly deteriorated by a digital watermarking with strong intensity. We have proposed a verification method for a digital image file using a discrete wavelet transform. The proposed method uses elements of multi-resolution representation of an image for identification and never changes the image. The experimental results show that the proposed method has an excellent property on the tolerance to compression.

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