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Cardinality sketches are popular data structures that enhance the efficiency of working with large data sets. The sketches are randomized representations of sets that are only of logarithmic size but can support set merges and approximate…

数据结构与算法 · 计算机科学 2024-05-29 Sara Ahmadian , Edith Cohen

Recently, Diffusion Transformers (DiTs) have emerged as a dominant architecture in video generation, surpassing U-Net-based models in terms of performance. However, the enhanced capabilities of DiTs come with significant drawbacks,…

计算机视觉与模式识别 · 计算机科学 2025-03-11 Junyi Wu , Zhiteng Li , Zheng Hui , Yulun Zhang , Linghe Kong , Xiaokang Yang

One tough problem of image inpainting is to restore complex structures in the corrupted regions. It motivates interactive image inpainting which leverages additional hints, e.g., sketches, to assist the inpainting process. Sketch is simple…

计算机视觉与模式识别 · 计算机科学 2024-05-21 Chang Liu , Shunxin Xu , Jialun Peng , Kaidong Zhang , Dong Liu

Image retrieval targets to find images from a database that are visually similar to the query image. Two-stage methods following retrieve-and-rerank paradigm have achieved excellent performance, but their separate local and global modules…

计算机视觉与模式识别 · 计算机科学 2023-08-09 Yunquan Zhu , Xinkai Gao , Bo Ke , Ruizhi Qiao , Xing Sun

Cardinality sketches are compact data structures for representing sets or vectors. These sketches are space-efficient, typically requiring only logarithmic storage in the input size, and enable approximation of cardinality (or the number of…

数据结构与算法 · 计算机科学 2025-03-17 Edith Cohen , Jelani Nelson , Tamás Sarlós , Mihir Singhal , Uri Stemmer

This paper analyzes the stability of interconnected continuous-time (CT) and discrete-time (DT) systems coupled through sampling and zero-order hold mechanisms. The DT system updates its output at regular intervals $T>0$ by applying an…

系统与控制 · 电气工程与系统科学 2026-01-05 Yiting Chen , Francesco Bullo , Emiliano Dall'Anese

Diffusion-based generative image compression has demonstrated remarkable potential for achieving realistic reconstruction at ultra-low bitrates. The key to unlocking this potential lies in making the entire compression process…

计算机视觉与模式识别 · 计算机科学 2026-03-26 Xihua Sheng , Lingyu Zhu , Tianyu Zhang , Dong Liu , Shiqi Wang , Jing Wang

Computed Tomography (CT) is an essential non-destructive three dimensional imaging modality used in medicine, security screening, and inspection of manufactured components. Typical CT data acquisition entails the collection of a thousand or…

医学物理 · 物理学 2024-10-11 Kyle M. Champley , Michael B. Zellner , Joseph W. Tringe , Harry E. Martz

Although transformer has achieved great progress on computer vision tasks, the scale variation in dense image prediction is still the key challenge. Few effective multi-scale techniques are applied in transformer and there are two main…

计算机视觉与模式识别 · 计算机科学 2021-09-21 Zekun Li , Yufan Liu , Bing Li , Weiming Hu , Kebin Wu , Pei Wang

Models pre-trained on large-scale datasets are often fine-tuned to support newer tasks and datasets that arrive over time. This process necessitates storing copies of the model over time for each task that the pre-trained model is…

计算机视觉与模式识别 · 计算机科学 2023-09-22 Chaitanya Devaguptapu , Samarth Sinha , K J Joseph , Vineeth N Balasubramanian , Animesh Garg

Convolution Neural Networks (CNN) have been extremely successful in solving intensive computer vision tasks. The convolutional filters used in CNNs have played a major role in this success, by extracting useful features from the inputs.…

计算机视觉与模式识别 · 计算机科学 2020-01-08 Pravendra Singh , Pratik Mazumder , Vinay P. Namboodiri

Deep Neural Networks (DNNs) are witnessing increased adoption in multiple domains owing to their high accuracy in solving real-world problems. However, this high accuracy has been achieved by building deeper networks, posing a fundamental…

机器学习 · 计算机科学 2021-01-20 Arjun Balasubramanian , Adarsh Kumar , Yuhan Liu , Han Cao , Shivaram Venkataraman , Aditya Akella

Discrete cosine transform (DCT) and other Fourier-related transforms have broad applications in scientific computing. However, off-the-shelf high-performance multi-dimensional DCT (MD DCT) libraries are not readily available in parallel…

分布式、并行与集群计算 · 计算机科学 2021-10-05 Zixuan Jiang , Jiaqi Gu , David Z. Pan

Deeply learned representations have achieved superior image retrieval performance in a retrieve-then-rerank manner. Recent state-of-the-art single stage model, which heuristically fuses local and global features, achieves promising…

计算机视觉与模式识别 · 计算机科学 2022-07-04 Yuxin Song , Ruolin Zhu , Min Yang , Dongliang He

Traditional sketch segmentation methods mainly rely on handcrafted features and complicate models, and their performance is far from satisfactory due to the abstract representation of sketches. Recent success of Deep Neural Networks (DNNs)…

图像与视频处理 · 电气工程与系统科学 2018-12-31 Fei Wang , Shujin Lin , Hanhui Li , Hefeng Wu , Junkun Jiang , Ruomei Wang , Xiaonan Luo

In this note we illustrate how common matrix approximation methods, such as random projection and random sampling, yield projection-cost-preserving sketches, as introduced in [FSS13, CEM+15]. A projection-cost-preserving sketch is a matrix…

数据结构与算法 · 计算机科学 2020-04-21 Cameron Musco , Christopher Musco

Matrix sketching is a powerful tool for reducing the size of large data matrices. Yet there are fundamental limitations to this size reduction when we want to recover an accurate estimator for a task such as least square regression. We show…

数据结构与算法 · 计算机科学 2024-05-10 Sachin Garg , Kevin Tan , Michał Dereziński

Overfitting is a problem in Convolutional Neural Networks (CNN) that causes poor generalization of models on unseen data. To remediate this problem, many new and diverse data augmentation methods (DA) have been proposed to supplement or…

计算机视觉与模式识别 · 计算机科学 2022-12-26 Steffen Illium , Gretchen Griffin , Michael Kölle , Maximilian Zorn , Jonas Nüßlein , Claudia Linnhoff-Popien

The Projected Gradient Descent (PGD) algorithm is a widely used and efficient first-order method for solving constrained optimization problems due to its simplicity and scalability in large design spaces. Building on recent advancements in…

最优化与控制 · 数学 2025-06-18 Lucka Barbeau , Marc-Étienne Lamarche-Gagnon , Florin Ilinca

AI-generated image detectors suffer significant performance degradation under real-world image corruptions such as JPEG compression, Gaussian blur, and resolution downsampling. We observe that state-of-the-art methods, including B-Free,…

计算机视觉与模式识别 · 计算机科学 2026-05-27 Zongyou Yang , Yinghan Hou , Xiaokun Yang