Results 1 to 10 of about 127,842 (198)
Discrete Cosine Transform for the Analysis of Essential Tremor [PDF]
Frontiers in Physiology, 2019 Essential tremor (ET) is the most common movement disorder. In fact, its prevalence is about 20 times higher than that of Parkinson's disease. In addition, studies have shown that a high percentage of cases, between 50 and 70%, are estimated to be of ...
Jordi Solé-Casals +11 more
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A New Pseudo-Spectral Method Using the Discrete Cosine Transform [PDF]
Journal of Imaging, 2020 The pseudo-spectral (PS) method on the basis of the Fourier transform is a numerical method for estimating derivatives. Generally, the discrete Fourier transform (DFT) is used when implementing the PS method. However, when the values on both sides of the
Izumi Ito
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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
semanticscholar +7 more sources
The Discrete Cosine Transform [PDF]
SIAM Review, 1999 In this paper the author derives the Discrete Cosine Transform (DCT) bases as eigenvectors of a symmetric second-difference matrix with certain boundary conditions. The type of boundary condition (Dirichlet or Neumann, centered at a meshpoint or a midpoint) determines the applications that are appropriate for each transform.
Gilbert Strang
exaly +3 more sources
Journal of King Saud University: Computer and Information Sciences, 2022 Digital data sharing is increased day by day due to the rapid access of the Internet by mass people. Multimedia, for example text, image, video, and audio can be easily accessed by unauthorized users.
Mahbuba Begum +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 ...
Jianqin Zhou
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Compressed Wideband Spectrum Sensing Based on Discrete Cosine Transform [PDF]
The Scientific World Journal, 2014 Discrete cosine transform (DCT) is a special type of transform which is widely used for compression of speech and image. However, its use for spectrum sensing has not yet received widespread attention.
Yulin Wang, Gengxin Zhang
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Automated breast image classification using features from its discrete cosine transform. [PDF]
PLoS ONE, 2014 PURPOSE: This work aimed to improve breast screening program accuracy using automated classification. The goal was to determine if whole image features represented in the discrete cosine transform would provide a basis for classification.
Edward J Kendall, Matthew T Flynn
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Text-image watermarking based on integer wavelet transform (IWT) and discrete cosine transform (DCT)
Applied Computing and Informatics, 2019 Text-images still have a great importance, despite the spread of electronic texts. Text-images are protected using digital watermarking. This paper proposes a watermarking method applied to text-images.
Reem A. Alotaibi, Lamiaa A. Elrefaei
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Discrete Cosine Transform Network for Guided Depth Map Super-Resolution [PDF]
Computer Vision and Pattern Recognition, 2021 Guided depth super-resolution (GDSR) is an essential topic in multi-modal image processing, which reconstructs high-resolution (HR) depth maps from low-resolution ones collected with suboptimal conditions with the help of HR RGB images of the same scene.
Zixiang Zhao +4 more
semanticscholar +1 more source