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Every year, the rate of elderly people is rising, and monitoring them in mass gatherings like a pilgrimage is a tough task. Millions of Muslims around the world visit Makkah and Madinah for the Hajj pilgrimage. Since 1990, more than 4800 pilgrims have died in the stampede. Aged pilgrims are very much vulnerable to these stampedes. To support them, it is very important to monitor their activities....
A novel hybrid image compression-encryption based on Cosine Number Transform and measurement matrix is proposed. The Cosine Number Transform is defined over algebraic structures in a finite field. Therefore only modular arithmetic is needed for computing the transform. Simultaneous compression and encryption is achieved by using chaotic map based key in the generation of a measurement matrix. One...
Multifocus image fusion increases the depth of field of a sensor by combining the images of same scene with different focus settings. So, extracting the useful image information of different source images plays a crucial role in image fusion process. In this paper, a novel fusion algorithm based on Discrete Wavelet Transform (DWT) and Sparse Representation (SR) is proposed. Initially, DWT is applied...
In this work, a new Multistage multiple image encryption using a combination of a 2-round Chaotic Block Cipher and Iterative Fractional Fourier Transform method is proposed. The Chaotic Block Cipher uses a logistic map to generate chaotic numbers and the Iterative Fractional Fourier Transform block is used to combine two images with phase of the images and the fractional orders as keys. The proposed...
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