Results 11 to 20 of about 1,495,143 (296)
The fractional discrete cosine transform
IEEE Transactions on Signal Processing, 2002 The extension of the Fourier transform operator to a fractional power has received much attention in signal theory and is finding attractive applications. The paper introduces and develops the fractional discrete cosine transform (DCT) on the same lines, discussing multiplicity and computational aspects. Similarities and differences with respect to the
CARIOLARO, GIANFRANCO +2 more
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Nigerian Journal of Technological Research, 2013 The discrete cosine transform (DCT), introduced by Ahmed, Natarajan and Rao, has been used in many applications of digital signal processing, data compression and information hiding. There are four types of the discrete cosine transform. In simulating the discrete cosine transform, we propose a generalized discrete cosine transform with three ...
Zhou, Jianqin
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On asymmetrical performance of discrete cosine transform
IEEE Transactions on Acoustics, Speech, and Signal Processing, 1990 The discrete cosine transform (DCT) is considered as a suboptimum transform for many practical source-coding applications. Autoregressive order 1 (AR(1)) source models are good first approximations to several natural signals. It is known that the performance of the DCT depends on the sign of the autocorrelation coefficient of the AR(1) source.
Ali N. Akansu, Richard A. Haddad
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Steerable Discrete Cosine Transform [PDF]
IEEE Transactions on Image Processing, 2017 In image compression, classical block-based separable transforms tend to be inefficient when image blocks contain arbitrarily shaped discontinuities. For this reason, transforms incorporating directional information are an appealing alternative. In this paper, we propose a new approach to this problem, namely a discrete cosine transform (DCT) that can ...
FRACASTORO, GIULIA +2 more
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The Discrete Cosine Transform on Triangles [PDF]
ICASSP 2019 - 2019 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2019 The discrete cosine transform is a valuable tool in analysis of data on undirected rectangular grids, like images. In this paper it is shown how one can define an analogue of the discrete cosine transform on triangles. This is done by combining algebraic signal processing theory with a specific kind of multivariate Chebyshev polynomials.
Bastian Seifert, Knut Hüper
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A Hybrid Robust Image Watermarking Method Based on DWT-DCT and SIFT for Copyright Protection
Journal of Imaging, 2021 In this paper, a robust hybrid watermarking method based on discrete wavelet transform (DWT), discrete cosine transform (DCT), and scale-invariant feature transformation (SIFT) is proposed.
Mohamed Hamidi +3 more
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, 2021 A low-density parity-check (LDPC) coded single-carrier frequency-division multiple access (SC-FDMA) system is proposed for effective image transmission.
Saha, Ritu +9 more
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A Hybrid Model of 2d-DCT and 2d-Mycielski Algorithm for Hourly Global Solar Irradiation
Advances in Electrical and Computer Engineering, 2020 In this work, hourly solar irradiation is defined as a two-dimensional discrete signal. This two-dimensional discrete signal is modeled by a novel hybrid approach, which includes both deterministic and stochastic processes.
FIDAN, M., SERTSOZ, M., KURBAN, M.
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Jurnal Nasional Pendidikan Teknik Informatika (JANAPATI), 2020 Banyaknya penyebaran citra digital menyebabkan maraknya tindakan seperti duplikasi dan penyebaran data secara ilegal, serta penyalahgunaan Hak akan Kekayaan dan Intelektual (HAKI).
Fitria Ilhami Ikromina
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An improved architecture for the adaptive discrete cosine transform [PDF]
, 1996 This paper presents a new approach to the efficient realisation of the discrete cosine transform for the specific case of interlaced image sequence coding.
Martin, F +3 more
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