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Surface roughness and texture are critical to the functional performance of engineering components. The ability to analyze roughness and texture effectively and efficiently is much needed to ensure surface quality in many surface generation…

Signal Processing · Electrical Eng. & Systems 2023-03-15 Melih C. Yesilli , Jisheng Chen , Firas A. Khasawneh , Yang Guo

Training state-of-the-art (SOTA) deep models often requires extensive data, resulting in substantial training and storage costs. To address these challenges, dataset condensation has been developed to learn a small synthetic set that…

Computer Vision and Pattern Recognition · Computer Science 2024-02-27 Hansong Zhang , Shikun Li , Pengju Wang , Dan Zeng , Shiming Ge

Recent advances in model compression have provided procedures for compressing large neural networks to a fraction of their original size while retaining most if not all of their accuracy. However, all of these approaches rely on access to…

Machine Learning · Computer Science 2017-11-27 Raphael Gontijo Lopes , Stefano Fenu , Thad Starner

We describe an image compression method, consisting of a nonlinear analysis transformation, a uniform quantizer, and a nonlinear synthesis transformation. The transforms are constructed in three successive stages of convolutional linear…

Computer Vision and Pattern Recognition · Computer Science 2020-07-28 Johannes Ballé , Valero Laparra , Eero P. Simoncelli

The discrete cosine transform (DCT) is a widely-used and important signal processing tool employed in a plethora of applications. Typical fast algorithms for nearly-exact computation of DCT require floating point arithmetic, are multiplier…

Hardware Architecture · Computer Science 2017-11-01 N. Rajapaksha , A. Madanayake , R. J. Cintra , J. Adikari , V. S. Dimitrov

Low-rank adaptation~(LoRA) has recently gained much interest in fine-tuning foundation models. It effectively reduces the number of trainable parameters by incorporating low-rank matrices $A$ and $B$ to represent the weight change, i.e.,…

Machine Learning · Computer Science 2024-05-07 Ziqi Gao , Qichao Wang , Aochuan Chen , Zijing Liu , Bingzhe Wu , Liang Chen , Jia Li

In this paper, we propose a novel Discrete Cosine Transform (DCT)-based neural network layer which we call DCT-perceptron to replace the $3\times3$ Conv2D layers in the Residual neural Network (ResNet). Convolutional filtering operations…

Computer Vision and Pattern Recognition · Computer Science 2022-11-17 Hongyi Pan , Xin Zhu , Salih Atici , Ahmet Enis Cetin

Incorporating diffusion models in the image compression domain has the potential to produce realistic and detailed reconstructions, especially at extremely low bitrates. Previous methods focus on using diffusion models as expressive…

Image and Video Processing · Electrical Eng. & Systems 2024-10-10 Lucas Relic , Roberto Azevedo , Markus Gross , Christopher Schroers

In JPEG (DCT based) compresses image data by representing the original image with a small number of transform coefficients. It exploits the fact that for typical images a large amount of signal energy is concentrated in a small number of…

Graphics · Computer Science 2014-02-13 Sukhpal Singh

Positron emission tomography (PET) is an advanced medical imaging technique that plays a crucial role in non-invasive clinical diagnosis. However, while reducing radiation exposure through low-dose PET scans is beneficial for patient…

Computer Vision and Pattern Recognition · Computer Science 2024-07-02 Bin Huang , Xubiao Liu , Lei Fang , Qiegen Liu , Bingxuan Li

Transform image processing methods are methods that work in domains of image transforms, such as Discrete Fourier, Discrete Cosine, Wavelet and alike. They are the basic tool in image compression, in image restoration, in image re-sampling…

Computer Vision and Pattern Recognition · Computer Science 2014-08-28 Leonid Yaroslavsky

Resource-constrained weight deployment is a task of immense practical importance. Recently, there has been interest in the specific task of \textit{Delta Compression}, where parties each hold a common base model and only communicate…

Machine Learning · Computer Science 2025-11-18 Cameron Gordon , Yiping Ji , Hemanth Saratchandran , Paul Albert , Simon Lucey

Soft context compression reduces the computational workload of processing long contexts in LLMs by encoding long context into a smaller number of latent tokens. However, existing frameworks apply uniform compression ratios, failing to…

Computation and Language · Computer Science 2026-03-30 Yijiong Yu , Shuai Yuan , Jie Zheng , Huazheng Wang , Ji Pei

The post-training phase of large language models is essential for enhancing capabilities such as instruction-following, reasoning, and alignment with human preferences. However, it demands extensive high-quality data and poses risks like…

Computation and Language · Computer Science 2026-03-04 Sheng Cao , Mingrui Wu , Karthik Prasad , Yuandong Tian , Zechun Liu

Deep image compression performs better than conventional codecs, such as JPEG, on natural images. However, deep image compression is learning-based and encounters a problem: the compression performance deteriorates significantly for…

Image and Video Processing · Electrical Eng. & Systems 2022-11-03 Koki Tsubota , Hiroaki Akutsu , Kiyoharu Aizawa

Video processing systems such as HEVC requiring low energy consumption needed for the multimedia market has lead to extensive development in fast algorithms for the efficient approximation of 2-D DCT transforms. The DCT is employed in a…

Multimedia · Computer Science 2015-01-14 U. S. Potluri , A. Madanayake , R. J. Cintra , F. M. Bayer , S. Kulasekera , A. Edirisuriya

The JPEG2000 standard defines the discrete wavelet transform (DWT) as a linear space-to-frequency transform of the image domain in an irreversible compression. This irreversible discrete wavelet transform is implemented by FIR filter using…

Hardware Architecture · Computer Science 2011-11-09 Sandro V. Silva , Sergio Bampi

Data compression has been widely adopted to release mobile devices from intensive write pressure. Delta compression is particularly promising for its high compression efficacy over conventional compression methods. However, this method…

Distributed, Parallel, and Cluster Computing · Computer Science 2022-10-11 Chao Wu , Cheng Ji , Geng Yuan , Riwei Pan , Weichao Guo , Chao Yu , Zongwei Zhu , Yanzhi Wang

Classification of images within the compressed domain offers significant benefits. These benefits include reduced memory and computational requirements of a classification system. This paper proposes two such methods as a proof of concept:…

Image and Video Processing · Electrical Eng. & Systems 2021-10-14 P. R. Hill , D. R. Bull

The high dimensionality of images presents architecture and sampling-efficiency challenges for likelihood-based generative models. Previous approaches such as VQ-VAE use deep autoencoders to obtain compact representations, which are more…

Computer Vision and Pattern Recognition · Computer Science 2021-03-08 Charlie Nash , Jacob Menick , Sander Dieleman , Peter W. Battaglia
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