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DWT Based Robust Image Hashing Algorithm

DWT Based Robust Image Hashing Algorithm. Authors: Yuan-yuan Hu, Xia-mu Niu Source: 2010 6 th International Conference on Network Computer (INC), Gyeongju, South Korea Speaker: Pei-lin Tsou Date: Nov 3 rd , 2010 . Outline. Introduction Proposed Scheme Experimental Results Conclusions.

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DWT Based Robust Image Hashing Algorithm

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  1. DWT Based Robust Image Hashing Algorithm Authors: Yuan-yuan Hu, Xia-mu Niu Source: 2010 6th International Conference on Network Computer (INC), Gyeongju, South Korea Speaker: Pei-lin Tsou Date: Nov 3rd, 2010 

  2. Outline • Introduction • Proposed Scheme • Experimental Results • Conclusions

  3. Introduction • Robust Hashing: Content-based digital signature of multimedia • Robustness • Fragility

  4. Proposed Scheme Image X 3-level DWT X’

  5. Experimental Results(1/3) (e) 2-D map of XLH ’ (f)2-D map of XHL ’ (g) 2-D map of XHH’ (h) 2-D map of h • Original Image • LH2 sub-band • HL2 sub-band • HH2 sub-band

  6. Experimental Results(2/3) ∙: logic AND + : logic OR

  7. Experimental Results(3/3) • Tampered image • 2-D mapping of the tamper image • Difference of 2D-mapping of original image and query • Localize the tampered region

  8. Conclusions • Robust for mild geometric attacks • Localize the tamped region

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