文章基本信息

标题：THE NEW APPROACH OF VISUAL CRYPTOGRAPHY SCHEME FOR PROTECTING THE GRAYSCALE MEDICAL IMAGES
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作者：S.MANIMUURGAN ; C.NARMATHA ; K.PORKUMARAN 等
期刊名称：Journal of Theoretical and Applied Information Technology
印刷版ISSN：1992-8645
电子版ISSN：1817-3195
出版年度：2014
卷号：69
期号：3
出版社：Journal of Theoretical and Applied
摘要：Transferring an image from one place to another or storing an image in a particular place in a secure manner has become a challenge. In order to face this challenge, a new Visual Cryptography (VC) scheme for grayscale medical images has been proposed. Generally, the VC method has a few problems or rather, short comings. For instance, when the pixels are expanded, the level of security applied will be high but the quality of reconstructed image will be low. Similarly, if the extent of pixel expansion is reduced, its security is lowered and quality of the image is retain. Hence, to achieve high security as well as to get a good image quality, the proposed Tailored Visual Cryptography Scheme (TVCS) for grayscale medical image is ideal. Some of the VC leads to loss while reconstructing the image but this proposed algorithm which has been developed for medical image, will not provide any loss and the result has been experimented and proved by measuring CC. The main advantage of this proposed method is to provide good quality for the images with reliable security without any pre or post processing. In the proposed algorithm, two types of processes are taking place: Tailored Visual Cryptography Encryption (TVCE) and Tailored Visual Cryptography Decryption (TVCD). The TVCE process provides an encrypted image and in order to get this encrypted image, Splitting Process, Converting Process, Pixel Process and Merging Process are performed. Simultaneously Segregation Process, Inverse Pixel Process, 8-bit into Decimal Conversion Process and Amalgamate Process are involved to retrieve the original medical image from the TVCD process. In the experimental part, many medical images have been tested and the result is also provided. In order to check the security properties like Confidentiality, Integrity and Availability (CIA), the CC has been calculated. From these experimentations, the proposed algorithm provides better result than the existing algorithms.
关键词：Visual Cryptography; Correlation Coefficient; Gray scale medical image