M. Kamarasan

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In today’s world, there are a number of cryptographic and steganographic techniques used in order to have secured data transfer between a sender and a receiver. In this paper we present a new hybrid approach that integrates the merits of cryptography and Image steganography based on multi resolution wavelet domain. First, the original message is encrypted(More)
The advent of large scale digital image database leads to great challenges in content-based image retrieval (CBIR) method. The CBIR is considered an active area of research; however, it comprises a strong backdrop for new methodologies and system implementations. Hence, many research contributions focus on these techniques to enable higher image retrieval(More)
This paper proposes wavelet based orthogonal polynomial coefficients model for content based image retrieval (CBIR). The coefficients are categorized into low-frequency and high-frequency based on a criteria. The criteria is adaptively determined and fixed according to the nature and structure of the image, because the wavelet based orthogonal polynomial(More)
This paper proposes a novel technique of color image retrieval based on multi-resolution image features and similarity measures, which extracts the color and texture features at optimum level of multi-resolution pyramid image. Here, Wavelet technique is employed to derive a multi-resolution pyramid image. Such extraction at an optimum level helps in(More)
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