1 / 15

Robust Image Authentication Using Content Based Compression

Robust Image Authentication Using Content Based Compression. Source: ACM Multimedia Systems, Vol.9, August 2003, page 121-130 Authors: Ee-Chien Chang, Mohan S. Kankanhalli, Xin Guan, Zhiyong Huang, Yinghui Wu Speaker: Kuo-Wei Weng Date: 2005/05/03.

samanthat
Download Presentation

Robust Image Authentication Using Content Based Compression

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Robust Image Authentication Using Content Based Compression Source:ACM Multimedia Systems, Vol.9, August 2003, page 121-130 Authors: Ee-Chien Chang, Mohan S. Kankanhalli, Xin Guan, Zhiyong Huang, Yinghui Wu Speaker:Kuo-Wei Weng Date: 2005/05/03

  2. Outline • Introduction • Creation of signature • Authentication • Conclusion

  3. Introduction Permissible operations：global operations Ex：resizing , JPEG compression Malefic tampering：localized operations Ex：Cropping , alteration

  4. Introduction Cont’ I0 +signature I A B

  5. Creation of signature Find Feature points Weighting Function (W) Compression Data (S) Signature (S,W)

  6. Creation of signature Cont’ Content-based： Salient points Weighting function

  7. Creation of signature Cont’ Weighting function w： α：rate of resolution falls off γ：foveal location β：foveal resolution

  8. Creation of signature Cont’ Foveated image： (with the center of the right eye as the fovea)

  9. Creation of signature Cont’ Compression Image： Uniform resolution image  Foveated image

  10. Creation of signature Cont’ DWT(Discrete Wavelet Transformation)

  11. Creation of signature Cont’ X

  12. Creation of signature Cont’ Compression image

  13. Authentication Receive I and signature Extract Compression Image Authentication

  14. Authentication Cont’ Where I0 is the original image I is the receive of image

  15. Conclusion • Important content information is not uniformly • distributed across the image and that illegal • operations are usually localized while permissible • operations are global in nature.

More Related