Digital Image Progressive Fusion Method Based on Discrete Cosine Transform by Jiezi Chen

“…Therefore, a new method for digital image progressive fusion was proposed based on discrete cosine transform, and its effectiveness was verified through experiments. …”
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Robust watermarking algorithm for medical images based on accelerated‐KAZE discrete cosine transform by Dekai Li, Yen‐wei Chen, Jingbing Li, Lei Cao, Uzair Aslam Bhatti, Pengju Zhang

“…A medical image watermarking algorithm based on an accelerated‐KAZE discrete cosine transform (AKAZE‐DCT) is proposed to address the poor robustness of medical image watermarking algorithms to geometric attacks, which leads to low security of the information contained in medical images. …”
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Energy-Efficient Discrete Cosine Transform Architecture Using Reversible Logic for IoT-Enabled Consumer Electronics by Muhammad Awais, Wilayat Khan, Tallha Akram, Yunyoung Nam

“…This paper introduces a novel Discrete Cosine Transform (DCT) architecture implemented using reversible logic to meet the requirements for effective data compression in IoT systems, such as smart surveillance and wearable health monitors. …”
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Discrete Cosine Transform Matrix Based SLM Algorithm for OFDM with Diminished PAPR for M-PSK over Different Subcarriers by Prabal Gupta, Rajiv Kumar Singh, H. Pal Thethi, Balpreet Singh, Santosh Kumar Nanda

“…In the proposed work, the SLM method has been used, but phase arrangement formation is based on the usage of discrete cosine transform (DCT) matrix. In this proposed work, discrete cosine transform matrix has been chosen based on the requirement of optimization so that the arrangement with lowest PAPR can be nominated for the transmission. …”
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Classification of Severity of Lung Parenchyma Using Saliency and Discrete Cosine Transform Energy in Computed Tomography of Patients With COVID-19 by Santiago Tello-Mijares, Francisco Flores, Fomuy Woo

“…Two types of images—saliency (Q) image and discrete cosine transform (DCT) energy image—were generated from these images. …”
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A Multiplier-Less Discrete Cosine Transform Architecture Using a Majority Logic-Based Approximate Full Adder by Elham Esmaeili, Farshad Pesaran, Nabiollah Shiri

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Blind video watermarking algorithm based on correlations between neighboring frames by GAO Qi, LI Ren-hou, LIU Lian-shan

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DCT and Wiener filter based on approach for speech enhancement using a single microphone by OU Shi-feng, ZHAO Xiao-hui, GU Hai-jun

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Digital Image Forensic Approach to Counter the JPEG Anti-Forensic Attacks by Amit Kumar, Gurinder Singh, Ankush Kansal, Kulbir Singh

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Video tamper detection method based on nonnegative tensor factorization by Xue-li ZHANG, Tian-qiang HUANG, Jing LIN, Wei HUANG

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Enhancing Secure Medical Data Communication Through Integration of LSB and DCT for Robust Analysis in Image Steganography by Ramyashree, P. S. Venugopala, S. Raghavendra, Vijay S. Kubihal

Subjects: “…Discrete Cosine Transform…”
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Model of Reconfigurable Steganographic System Using Blockchain Technology by E. V. Timoschenko, A. F. Razhkov

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Backpropagation Neural Network Implementation for Medical Image Compression by Kamil Dimililer

“…In this paper, Haar wavelet transform and discrete cosine transform are considered and a neural network is trained to relate the X-ray image contents to their ideal compression method and their optimum compression ratio.…”
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Expression method of 3-D SDCT based on transform basic matrix by Wen-bang SUN, Hai-yan TANG, Wen-bin SUN, Hong CHENG

“…The expression method of 3-D SDCT(sub-matrices discrete cosine transform)was studied.First,four 3-D matrix operation principles were defined.Then,the transform basic matrix used for 3-D SDCT operation was build and the operation principle of 3-D SDCT was described in detail.Finally,the performance of 3-D SDCT was analyzed.The theoretical analysis shows that the proposed method makes 3-D DCT succinct to express,easy to comprehend and convenient to operate.…”
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RAM-ROM sebagai Pendukung Algoritma Zigzag Scan Menggunakan Metode Pemetaan pada Kompresi Citra Real-Time by Robby Candra

“…Hal ini bertujuan agar proses scan dapat berlangsung dengan cepat karena proses penulisan dan pembacaan koefisien Discrete Cosine Transform (DCT) dapat dilakukan secara bersamaan di kedua RAM tersebut. …”
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Transform coding of DCT coefficients in video encoder by WANG Zhong-yuan, HU Rui-min, TIAN Gang, LI Ming

“…The redundancy among discrete cosine transform（DCT） coefficients in video encoder was found very strong,a method for subband decomposition and transform coding was proposed.Each 8×8 DCT spectrum date of macroblock was regrouped to gather the same frequency bands.The Hadamard transform function was used and orthogonal integer Ha-damard transform formula was derived.Simulation results shows that the proposed approach reduces the spectrum redun-dancy and improves the compression efficiency further compared with conventional DCT coder,however the PSNR loss are almost invisible.This work is expected to contribute to the under drafted international video compression standard H.265.…”
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Lagrange multiplier selection based on SATD for H.265/HEVC by Wei LI, Fan ZHAO, Er-hu ZHANG, Peng REN

“…In order to improve the coding performance of intra rough mode decision,a SATD-based Lagrange multiplier selection algorithm was proposed for H.265/HEVC.The characteristic of Hadamard transform was first analyzed,and following the new Lagrange multiplier calculation approach based on the distortion measurement of SATD was constructed according to the rate-distortion theory.Then combing the principle of discrete cosine transform,the related parameters were obtained by the formula derivation.Experimental results show that the proposed method supports more accurately intra prediction mode decision,and the reconstruction video quality is improved in average while keeping the same bit-rate.…”
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Adaptive-clustered image-block hierarchical DCT hybrid digital-analog wireless transmission method by Shu TANG, Peng YANG, Xianzhong XIE, Guangyi ZHOU, Jiaqing LI, Yu ZHAO

“…In order to achieve high quality image transmission, a novel hybrid digital-analog (HDA) wireless transmission method was proposed.Firstly, the image residual layer was constructed by subtracting the downsampled and upsampled images from the original image respectively.Secondly, an adaptive-clustered block-level discrete cosine transform (DCT) algorithm was proposed to efficiently remove the correlation between image pixels in the residual layer.Finally, an image block level-based unequal power allocation strategy for further boosting the quality of received images was proposed.Extensive experiments results demonstrate that the proposed method is significantly superior to existing successful hybrid digital analog image wireless transmission methods in both qualitative evaluation and quantitative measurement.…”
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Robust video watermarking algorithm for H.264/AVC based on texture feature by Wei-wei ZHANG, Ru ZHANG, Jian-yi LIU, Xin-xin NIU, Yi-xian YANG

“…On the basis of analyzing some existing video watermarking al ithms and combining with the new features of the H.264/AVC video coding standard,a new robust video watermarking algorithm based on texture feature was proposed.The proposed algorithm firstly performs the 4×4 integer discrete cosine transform on the current frame in purpose of identifying whether it is the texture block.Then the watermarking is embedded by adopting the way of differential energy for selecting the appropriate coefficients adaptively.The experimental result shows that the proposed algorithm has little impact on the video quality and bit-rate,moreover,its robustness can effectively resist the common attacks such as the gauss noise,low pass filter and re-coded performed on the video watermarking.…”
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8～64kbit/s super-wideband embedded speech and audio coding algorithm by JIA Mao-shen, BAO Chang-chun, LI Rui

“…The information in the frequencies of 0~7 kHz was encoded by G.729.1 codec at 8~32kbit/s, the information in the frequencies of 7~14 kHz was encoded by the transform coding at 36、40 and 48kbit/s, and G.729.1 residual signal’s MDCT （modified discrete cosine transform） was encoded by the transform coding at 56 and 64kbit/s. …”
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