DT-CWT Based Image Retrieval Algorithm

摘要

In order to improve the security and robustness of image retrieval, a novel image hashing algorithm based on dual tree complex wavelet transform (DT-CWT) for content-based image retrieval (CBIR) application is proposed in this paper.By employing DT-CWT and normalized Hamming distance, a robust hashing sequence is obtained by preprocessing, feature extracting and post processing.For illustration the performance of proposed algorithm, several benchmark images are utilized to show the feasibility of the image hashing algorithm.Experimental results show that the proposed scheme in this paper is suitable for CBIR application.