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- 저자 : Lokanadham Naidu Vadlamudi (검색결과 1 건)
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Robust image hashing using SIFT feature points and DWT approximation coefficients
Lokanadham Naidu Vadlamudi,Rama Prasad V. Vaddella,Vasumathi Devara 한국통신학회 2018 ICT Express Vol.4 No.3
This study proposes a robust hashing method using scale-invariant feature transform (SIFT) features points and discrete wavelet transform (DWT) approximation coefficients for image authentication. Initially, the invariant feature points are computed using SIFT from the component of color image. Next, n distinct SIFT feature points are utilized to extract image content from the component. Then, DWT is applied to extracted content in order to compute approximation coefficients. Finally, the approximation coefficients are normalized to form a binary hash. Experimental results show that the proposed method is robust to various content-preserving operations such as compression, scaling, filtering, additive noise, brightness, and contrast adjustment. In addition, the performance of the proposed method is compared to existing methods using a receiver operating characteristics curve. The comparison results show that the proposed method performs better than the existing methods.
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