Image hashing resilient to geometric and filtering operations

TitleImage hashing resilient to geometric and filtering operations
Publication TypeConference Papers
Year of Publication2004
AuthorsSwaminathan A, Mao Y, M. Wu
Conference NameMultimedia Signal Processing, 2004 IEEE 6th Workshop on
Date Published2004/10/01/sept
Keywordscompact, cryptographic, cryptography;, discrete, distortion;, Filtering, Fourier, function;, geometric, hash, image, key, key;, operation;, polar, PROCESSING, public, representation;, theory;, transform;, transforms;

Image hash functions provide compact representations of images, which is useful for search and authentication applications. In this work, we have identified a general three step framework and proposed a new image hashing scheme that achieves a better overall performance than the existing approaches under various kinds of image processing distortions. By exploiting the properties of discrete polar Fourier transform and incorporating cryptographic keys, the proposed image hash is resilient to geometric and filtering operations, and is secure against guessing and forgery attacks.