| Presentation | 2001/12/6 Watermarking Method Using PN Diffusion and 1D-Fourier Transform of Multi-Resolution Approximation for Image Koichiro TSUGE, Yasuyuki NOGAMI, Yoshitaka MORIKAWA, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In this paper, we propose image digital watermark method which has robustness against image compression and clipping. In this method, we first at first take discrete wavelet transform of original image, and get out multi-resolution approximation(MRA). Next, we spread spectrum of the MRA by Pseudo Noise(PN)sequence, and then take 1D-discrete Fourier transform(DFT)of each column. We vary the DFT coefficients according to each bit of watermark information. This method has the features which the third eavesdropper, who don't know the PN sequence, can not decipher the information data and alter them. In detection process, we take the DFT difference between PN-spread MRA of original image and that of watermark-embedded image and calculate shift of the DFT coefficients. Therefore, this method has the advantage that we can detect the watermark information even from the clipping image. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | digital watermark / discrete wavelet transform / multi-resolution approximation / spectrum spreading / discrete Fourier transform |
| Paper # | CS2001-109,IE2001-136 |
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| Conference Information | |
| Committee | CS |
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| Conference Date | 2001/12/6(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Communication Systems (CS) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Watermarking Method Using PN Diffusion and 1D-Fourier Transform of Multi-Resolution Approximation for Image |
| Sub Title (in English) | |
| Keyword(1) | digital watermark |
| Keyword(2) | discrete wavelet transform |
| Keyword(3) | multi-resolution approximation |
| Keyword(4) | spectrum spreading |
| Keyword(5) | discrete Fourier transform |
| 1st Author's Name | Koichiro TSUGE |
| 1st Author's Affiliation | Faculty of Engineering, Okayama University() |
| 2nd Author's Name | Yasuyuki NOGAMI |
| 2nd Author's Affiliation | Faculty of Engineering, Okayama University |
| 3rd Author's Name | Yoshitaka MORIKAWA |
| 3rd Author's Affiliation | Faculty of Engineering, Okayama University |
| Date | 2001/12/6 |
| Paper # | CS2001-109,IE2001-136 |
| Volume (vol) | vol.101 |
| Number (no) | 494 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |