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Realistic image forgeries involve a combination of splicing, resampling, cloning, region removal and other methods. While resampling detection algorithms are effective in detecting splicing and resampling, copy-move detection algorithms…

Learning from human feedback has been shown to improve text-to-image models. These techniques first learn a reward function that captures what humans care about in the task and then improve the models based on the learned reward function.…

Including derivative information in the modelling of moving interfaces has been proposed as one method to increase the accuracy of numerical schemes with minimal additional cost. Here a new level set reinitialization technique using the…

数值分析 · 数学 2011-11-30 David Salac

Visual place recognition is a critical task in computer vision, especially for localization and navigation systems. Existing methods often rely on contrastive learning: image descriptors are trained to have small distance for similar images…

计算机视觉与模式识别 · 计算机科学 2024-01-30 María Leyva-Vallina , Nicola Strisciuglio , Nicolai Petkov

Human action recognition and performance assessment have been hot research topics in recent years. Recognition problems have mature solutions in the field of sign language, but past research in performance analysis has focused on…

计算机视觉与模式识别 · 计算机科学 2024-04-18 Hongli Wen , Yang Xu

Learning-based approaches for solving large sequential decision making problems have become popular in recent years. The resulting agents perform differently and their characteristics depend on those of the underlying learning approach.…

机器学习 · 计算机科学 2020-08-04 Timo P. Gros , Daniel Höller , Jörg Hoffmann , Verena Wolf

Reinforcement Learning from Human Feedback (RLHF) has been commonly used to align the behaviors of Large Language Models (LLMs) with human preferences. Recently, a popular alternative is Direct Policy Optimization (DPO), which replaces an…

计算与语言 · 计算机科学 2024-06-03 Runsheng Yu , Yong Wang , Xiaoqi Jiao , Youzhi Zhang , James T. Kwok

This manuscript demonstrates an improved model-based approach for synthetic degradation of previously captured eye movement signals. Signals recorded on a high-quality eye tracking sensor are transformed such that their resulting eye…

人机交互 · 计算机科学 2023-06-16 Henry Griffith , Samantha Aziz , Dillon J Lohr , Oleg Komogortsev

A technique is presented for producing synthetic images from numerical simulations whereby the image resolution is adapted around prominent features. In so doing, adaptive image ray-tracing (AIR) improves the efficiency of a calculation by…

天体物理仪器与方法 · 物理学 2015-05-20 E. R. Parkin

Discriminative correlation filter (DCF) based trackers have recently achieved excellent performance with great computational efficiency. However, DCF based trackers suffer boundary effects, which result in unstable performance in…

计算机视觉与模式识别 · 计算机科学 2020-11-17 Taihang Dong , Sheng Zhong

Repetitive action counting (RAC) aims to estimate the number of class-agnostic action occurrences in a video without exemplars. Most current RAC methods rely on a raw frame-to-frame similarity representation for period prediction. However,…

计算机视觉与模式识别 · 计算机科学 2025-01-14 Sujia Wang , Xiangwei Shen , Yansong Tang , Xin Dong , Wenjia Geng , Lei Chen

We introduce the concept of unconstrained real-time 3D facial performance capture through explicit semantic segmentation in the RGB input. To ensure robustness, cutting edge supervised learning approaches rely on large training datasets of…

计算机视觉与模式识别 · 计算机科学 2016-04-12 Shunsuke Saito , Tianye Li , Hao Li

Techniques that learn improved representations via offline data or self-supervised objectives have shown impressive results in traditional reinforcement learning (RL). Nevertheless, it is unclear how improved representation learning can…

计算与语言 · 计算机科学 2024-10-25 Vaskar Nath , Dylan Slack , Jeff Da , Yuntao Ma , Hugh Zhang , Spencer Whitehead , Sean Hendryx

Reinforcement learning generates policies based on reward functions and hyperparameters. Slight changes in these can significantly affect results. The lack of documentation and reproducibility in Reinforcement learning research makes it…

人工智能 · 计算机科学 2023-10-10 Haider Kamal , Muaz A. Niazi , Hammad Afzal

Although two-stage object detectors have continuously advanced the state-of-the-art performance in recent years, the training process itself is far from crystal. In this work, we first point out the inconsistency problem between the fixed…

计算机视觉与模式识别 · 计算机科学 2020-07-28 Hongkai Zhang , Hong Chang , Bingpeng Ma , Naiyan Wang , Xilin Chen

This paper provides a systematic comparison between Fitted Dynamic Programming (DP), where demand is estimated from data, and Reinforcement Learning (RL) methods in finite-horizon dynamic pricing problems. We analyze their performance…

综合经济学 · 经济学 2026-04-16 Lev Razumovskiy , Nikolay Karenin

We propose 4 insights that help to significantly improve the performance of deep learning models that predict surface normals and semantic labels from a single RGB image. These insights are: (1) denoise the "ground truth" surface normals in…

计算机视觉与模式识别 · 计算机科学 2019-06-18 Steven Hickson , Karthik Raveendran , Alireza Fathi , Kevin Murphy , Irfan Essa

Facial micro-expression recognition (MER) is a challenging task, due to the transience, subtlety, and dynamics of micro-expressions (MEs). Most existing methods resort to hand-crafted features or deep networks, in which the former often…

计算机视觉与模式识别 · 计算机科学 2025-09-12 Zhiwen Shao , Yifan Cheng , Fan Zhang , Xuehuai Shi , Canlin Li , Lizhuang Ma , Dit-yan Yeung

The Refl1d program is used for modeling and fitting data from neutron and X-ray reflectometry experiments. The model of the (thin-film) samples is typically constructed of discrete layers of different scattering-length densities (SLD).…

计算物理 · 物理学 2018-01-22 Brian B. Maranville , Aaron Green , Paul A. Kienzle

The need of sign language is increasing radically especially to hearing impaired community. Only few research groups try to automatically recognize sign language from video, colored gloves and etc. Their approach requires a valid…

计算机视觉与模式识别 · 计算机科学 2010-01-13 M. Krishnaveni , Dr. V. Radha