International Journal of Engineering Research

Angarika Jadhav ¹, N. M. Shahane ¹

Affiliations
1 K.K.W.I.E.E.R, Nashik, IN

Abstract

Template and databases are very important part of biometric system and attacker mostly attacks on template and database of biometic system, so securing them is very important. Size of the database is very large so reduce database size is also very crucial issue these days. Our aim is to provide privacy to the user by protecting template and to reduce dimension of the template database for effective computations. With this aim in mind we have proposed Classical Multidimensional scaling technique which is very effective in dimension reduction as well as it also provides privacy to the user by securing template. We have implemented biometric system using PCA, RP, PCARP and Classical MDS. Experimental results show that proposed technique is more effective in dimesion reduction as well as it also improves the recognition rate of the biometric system. Comparative analysis of Proposed method with PCA, RP, and PCARP are also discussed.

Keywords

Biometric System, Template, PCA, Random Projection, Classical Multidimensional Scaling, Face Recognition, Privacy, Dimension Reduction Etc.

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Shital B. Pawar ¹, N. M. Shahane ¹

Affiliations
1 K.K.W.I.E.E.R, Nashik, Maharashtra, IN

Abstract

The Visual Cryptography Scheme (VCS) is a kind of secret sharing scheme that focuses on sharing secret images. The basic idea of the visual cryptography scheme is to split a secret image into number of random shares (printed on transparencies) which separately reveals no information about the secret image other than the size of the secret image. The secret image can be reconstructed by stacking the shares. The underlying operation of this scheme is logical OR operation. The Embedded Extended Visual Cryptography Scheme (EEVCS) uses meaningful covering shares. The scheme EEVCS can be implemented by embedding random shares of secret image into meaningful cover images. The halftoning method is used to convert the gray scale image into binary image. After Studying existing Dithering technique of half toning, Otsus Thresholding method is proposed. Least Significant Bit (LSB) matching steganography technique is used to hide the secret pixel information into the covering images. Related works on visual cryptography scheme are also investigated and it was observed that visual quality of recovered secret images are low by using existing dithering halftone based EEVCS techniques. Including Otsus Thresholding method for halftoning of an image can produce bright image in a better way. LSB matching steganography is a useful method to hide the secret image. This research aims at employing LSB matching steganography with Otsu's method to develop an efficient EEVCS system.

Keywords

Embedded Extended Visual Cryptography Scheme, Otsu's Method, Dithering Technique, Least Significant Bit, Visual Cryptography Scheme.

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