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A low complexity VLSI Architecture has been proposed that removes the random valued impulse noise having grey scale values from [0–255], found more while transmitting images. Guard filter plays a vital role in reconstructing the pixel's intensity values. Image compression performed here uses a special algorithm that reduces the power consumption.
In this paper a lossless compression scheme is presented. In this scheme we have compared our newly proposed model with lossless predictive code (LPC) and differential pulse code modulation (DPCM) and we have shown how our model is more advantageous than LPC and DPCM. This newly proposed scheme for Huffman coding will achieve higher compression as we have reduced the mean value of the pixel in the...
In this paper we compare data hiding techniques based on wavelet-like transform, viz., Slantlet transform, DD DT DWT and Complex Wavelet transforms, viz., DT CWT using wavelet based fusion method and thresholding method. The experimental results are compared with the existing method based on DWT. We observe that the proposed algorithms based on SLT and DT-CWT outperform the DWT in terms of visual...
It is well known that the images, often used in variety of computer applications, are difficult to store and transmit. One possible solution to overcome this problem is to use a data compression technique where an image is viewed as a matrix and then the operations are performed on the matrix. In this paper, image compression is achieved by using singular value decomposition (SVD) technique on the...
In this paper we propose a steganography technique based on Stantlet transform and T-codes. The Stantlet transform are wavelet-like transforms that provides better time localization and signal compression than the conventional discrete cosine transforms (DCT) and discrete Haar-wavelet transforms. T-codes are used for better embedding capacity and decoding efficiency. The proposed method first encodes...
Biometric techniques have inherent advantages over traditional personal identification technique. Biometric techniques uses a mechanism to scan and capture a digital or analog image of a living personal characteristic and a matching system to match input biometric image to stored biometric templates. Among various commercially available biometric techniques such as face, fingerprint, Iris etc., fingerprint-based...
Bit plane coding (BPC) constitutes an important component of the EBCOT Tier-1 block of JPEG2000 encoder. This paper proposes an efficient parallel hardware structure to implement the computation intensive word level bit plane coding algorithm. The proposed architecture computes the context and decision for all bit planes in parallel. The three coding passes are merged for all bit planes in a scan...
In this paper, the problem of obtaining calibration parameters for a stereo camera system is considered. A real coded genetic algorithm is used to solve this problem. The solution of extrinsic and intrinsic parameters of the left and right cameras are encoded in the vectors of real numbers. The Laplace crossover and power mutation operators are used to obtain next generation of the solutions. The...
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