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Discrete Cosine Transform
Discrete Cosine Transform (DCT) is a special form of Discrete Fourier Transform. It is computationally lighter than DFT and is widely used in speech...
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Parallel Implementation of Discrete Cosine Transform (DCT) Methods on GPU for HEVC
The High-Efficiency Video Coding (HEVC) standard represents a significant advancement in video compression technology, offering superior compression...
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A color image encryption and hiding algorithm based on hyperchaotic system and discrete cosine transform
Some existing image encryption schemes based on chaotic systems have various security defects, such as non-uniform distribution of the chaotic...
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Discrete cosine transform-based data hiding for speech bandwidth extension
The limited narrow frequency range of 300–3400 Hz used in public switched telephone networks causes a significant reduction of speech quality. To...
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Discrete cosine transform interpolation based design of two-dimensional FIR fractional order digital differentiator
In this paper a two-dimensional (2-D) DCT interpolation based method for the designing of a 2-D fractional order digital differentiator (FODD) is...
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Data-driven discrete cosine transform (DCT)-based modeling and simulation for hourly air humidity prediction
The air humidity is one essential measurable characteristic widely used in engineering and science. It is highly associated with the air temperature...
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Discrete Fourier Transform
In the chapter, Discrete Fourier Transform, the most often used version of Fourier analysis, the DFT and its inverse are derived with appropriate...
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Discrete-Time Fourier Transform
Discrete-time Fourier transform is defined as the sum of the product of a sequence and complex exponent. In this chapter, classical sums that include...
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Fusion of infrared and visible images based on discrete cosine wavelet transform and high pass filter
A single visible image and an infrared image have specific limits in representing environmental information, combining the two can enhance the visual...
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Discrete-Time Fourier Transform
In this chapter, Discrete-Time Fourier Transform, the version of the Fourier analysis that is more suitable for theoretical analysis of signals and...
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Double-Image Encryption Through Compressive Sensing and Discrete Cosine Stockwell Transform
This paper introduces a double-image encryption algorithm using compressive sensing and discrete cosine Stockwell transform (DCST). The source images...
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Image Processing: Image Compression Using Compressed Sensing, Discrete Cosine Transform and Wavelet Transform
Recently, the image quality and the speed of acquisition are very studied, particularly in the medical field. We try to find in our paper the most...
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The Discrete Fourier Transform
In this chapter, the discrete Fourier transform and its inverse are derived using the orthogonality property of harmonically related discrete...
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A Security Enhanced Image Encryption and Compression Using Residue Number System and Discrete Cosine Transform
In today’s world, to transfer information, internet is the main media. This information may be text, audio, image, graphics, video, etc. There is...
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Image Forensic Investigation Using Discrete Cosine Transform-Based Approach
Digital image tempering is widespread because software and devices that manipulate image information are easily available for high-performance image...
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The Discrete-Time Fourier Transform
In this chapter, the discrete-time Fourier transform and its inverse are derived starting from the DFT. Discrete aperiodic signals are analyzed using...
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Human Emotion Recognition Using Facial Characteristic Points and Discrete Cosine Transform with Support Vector Machine
This paper introduces a method for human emotion recognition using facial characteristic points (FCPs) and discrete cosine transform (DCT)...
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A Robust Watermarking Algorithm for Medical Images Based on DWT-Daisy and Discrete Cosine Transform
With the development of digital medical imaging technology, the transmission of medical data in the network is becoming more and more frequent. In...
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Sine Cosine Algorithm for Discrete Optimization Problems
In many scenarios, the nature of the decision-making is discrete and we have to deal with a situation where decisions have to be made from the set of...
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Novel Discrete Component Wavelet Transform for detection of cerebrovascular diseases
Detection and diagnosis of a disease with a single image can be tedious and difficult for doctors but with the adaptation of medical image fusion, a...
