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This paper presents improved technique for reversible data hiding. It is based on dividing the image into blocks, intensity histogram of each block is generated and shifting the histograms of each image block between its minimum and maximum frequency. Data are then inserted at the pixel level with the largest frequency to maximize data hiding capacity. The peaks (maxima) of the histograms of the image...
This paper propose a double bilateral filter that extends the classical bilateral filtering for image noise removal. A new median-metric weighting function is introduced by incorporating a 3 × 3 median filter into a second bilateral filter. A variety of images contaminated by various degrees of Gaussian, impulse, and mixed noise were used to assess the performance of this new filtering method. It...
Now a days also ID-password based authentication system is more popular. But as users and number of sites, users are going to handle, are increasing day by day it is not only difficult to remember ID and passwords but also to manage such a great database for site manager. Also no one is ready to have risk of hackers, key loggers etc. Users need more security. So here, the focus is on biometric security...
This paper describes a gesture recognition system in which a hand gesture commands are recognized. A fuzzy C-means clustering method is used to classify hand postures as "gestures". The fuzzy recognition system was tested for both user dependent and user independent gestures vocabulary. Results revealed recognition rate (the ratio of user independent gestures to user dependent gestures)...
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