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In this paper, we work on the topological properties such as the connectivity of regions, the boundaries and the adjacency for 2-D grayscale images. We present some original ideas for applying topology methods onto the graylevel image transformation which we call it pansystem topology. We use a Pansystem Parental model to develop an algorithm for grayscale image transformation. We also analyze the...
Proxy re-encryption (PRE) allows a ciphertext computed under Alice's public key to be transformed to those which can be decrypted by Bob. Since Blaze et al. introduced the concept of proxy re-encryption in Eurocrypt'98, there are many results on proxy re-encryption. However, all the proxy re-encryption schemes proposed until now assume the proxy having no its own public/private keys. In this paper,...
In the subband coding of image, direction of image features has already emphasized to want a function. In this paper, we propose a adaptive lifting transform (ALT) that adapts the direction filter to image based on the lifting scheme. In addition, We design a lossless and loss compression parallel system, which realized the energy of high frequency subbands as few as possible. Experimental results...
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