Study on a Digital Watermarking Method using Wavelet Transform Coefficients of Several Bands

Hirofumi YOSHIDA; Madoka HASEGAWA; Shigeo KATO

doi:10.11371/aiieej.33.0.21.0

Media Computing Symposium in Nagano 2005 - Proceedings of the 33rd Annual Conference of the Institute of Image Electronics Engineers of Japan -

Session ID : 05-11

DOI https://doi.org/10.11371/aiieej.33.0.21.0

Conference information

Host: The Institute of Image Electronics Engineers of Japan

Co-host: Information Processing Society of Japan, Shinshu University

Postar Sessions

Study on a Digital Watermarking Method using Wavelet Transform Coefficients of Several Bands

*Hirofumi YOSHIDA, Madoka HASEGAWA, Shigeo KATO

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Keywords: Digital watermark, Copyright protection, Wavelet transform, Digital image

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Abstract

We propose a new watermarking method to embed a watermark using wavelet coefficients in several frequency bands and the sum of absolute value of two coefficients. In this paper, we evaluated PSNR of a watermarked image and residual ratio after the image was compressed by JPEG. We also compared them with the conventional method that utilized the vector conversion of the coefficients in the lowest frequency band of wavelet transform.

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