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The quality of images often is affected adversely by illumination and contrast,leading to the need for illumination compensation in image enhancement. The main objective of this paper is to describe how to correct the local contrast in different area of the image so that the invisible features in the dark and bright areas are brought out and made visible to the human eye. Considering the fact that...
Authorization takes a significant role in grid security, and the function of the agent is more and more obvious in the grid environment. However, some popular grid toolkits (e.g., Globus) do not support agent technology. In order to enhance the real-time validity of the authorization process, lighten the userspsila burden, reduce the cost of management and apply intelligent authorization, this paper...
In this paper, a new oblivious fragile watermarking using discrete cosine transform is proposed. It is inspired by Wong's public key watermarking scheme proposed in 1998 and aims to improve its vulnerability towards possible attacks indicated by Barreto and Holliman. Instead of making use of contextual information and making it an inter-block dependent scheme, as suggested by Barreto, we adopt another...
In this paper, we propose a new color image retrieval scheme based on color features. The goal of this scheme is to effectively retrieve images similar to a query image in a color image database. In this scheme, a color image is first divided into three planes. Then the local features of the given image can be found by calculating the color difference of each plane. Thereafter, the color difference...
In 2002, Tung et al. introduced the so-called intellectual Chinese phonetic symbol input system for the placement of Chinese phonetic symbols on mobile phones keyboard. In order to come to good placements, Thung et al. and Chang et al. have proposed their finding algorithms. In this paper, we shall also present a new method we have developed by using the branch-and-bound strategy. In our method, the...
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