Application of Two-Dimensional Discrete Cosine Transform to Coefficients of Bailey-Norton Creep Law

Digital image Watermarking using Two Dimensional Discrete Wavelet Transform, Discrete Cosine Transform and Fast Fourier Transform

Abstract—In digital watermarking, a watermark is embedded into a cover text in such a way that the resulting watermarked signal is robust to certain distortion caused by either standard data processing in a friendly environment or malicious attacks in an unfriendly environment. This paper presents a digital image watermarking based on two dimensional discrete cosines transform (DCT2), two dimen...

JPEG Encoder using Discrete Cosine Transform & Inverse Discrete Cosine Transform

In the past decade, the advancement in data communications was significant during explosive growth of the Internet, which led to the demand for using multimedia in portable devices. Video and Audio data streams require a huge amount of bandwidth to be transferred in an uncompressed form. The objective of this paper is to minimize the number of bits required to represent an image and also the ac...

Block-level Discrete Cosine Transform Coefficients for Autonomic Face Recognition

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Pruning the Two-Dimensional Fast Cosine Transform

Two pruning algorithms for the Vector-Radix Fast Cosine Transform are presented. Both are based on an in-place approach of the direct two-dimensional fast cosine transform (2D FCT). The first pruning algorithm concerns the computation of N0xN0 out of NxN DCT points, where both N0 and N are powers of 2. The second pruning algorithm is more general and concerns a recursive approach for the comput...

Discrete Cosine Transform