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Table tennis robots gained traction over the last years and have become a popular research challenge for control and perception algorithms. Fast and accurate ball detection is crucial for enabling a robotic arm to rally the ball back…

Robotics · Computer Science 2025-02-04 Andreas Ziegler , Thomas Gossard , Arren Glover , Andreas Zell

In this paper, we demonstrate a score based indexing approach for tennis videos. Given a broadcast tennis video (BTV), we index all the video segments with their scores to create a navigable and searchable match. Our approach temporally…

Computer Vision and Pattern Recognition · Computer Science 2018-01-08 Anurag Ghosh , C. V. Jawahar

Spin plays a pivotal role in ball-based sports. Estimating spin becomes a key skill due to its impact on the ball's trajectory and bouncing behavior. Spin cannot be observed directly, making it inherently challenging to estimate. In table…

Computer Vision and Pattern Recognition · Computer Science 2024-04-16 Thomas Gossard , Julian Krismer , Andreas Ziegler , Jonas Tebbe , Andreas Zell

Sound can complement vision in ball sports by providing subtle cues about contact dynamics. In table tennis, the brief, high-frequency sounds produced during racket-ball impacts carry information about the racket type, the surface…

Sound · Computer Science 2025-09-22 Thomas Gossard , Julian Schmalzl , Andreas Ziegler , Andreas Zell

We investigate architectures of discriminatively trained deep Convolutional Networks (ConvNets) for action recognition in video. The challenge is to capture the complementary information on appearance from still frames and motion between…

Computer Vision and Pattern Recognition · Computer Science 2014-11-13 Karen Simonyan , Andrew Zisserman

We propose a two-stream network for face tampering detection. We train GoogLeNet to detect tampering artifacts in a face classification stream, and train a patch based triplet network to leverage features capturing local noise residuals and…

Computer Vision and Pattern Recognition · Computer Science 2018-04-02 Peng Zhou , Xintong Han , Vlad I. Morariu , Larry S. Davis

Robot table tennis systems require a vision system that can track the ball position with low latency and high sampling rate. Altering the ball to simplify the tracking using for instance infrared coating changes the physics of the ball…

Robotics · Computer Science 2020-01-08 Sebastian Gomez-Gonzalez , Yassine Nemmour , Bernhard Schölkopf , Jan Peters

Motion blur reduces the clarity of fast-moving objects, posing challenges for detection systems, especially in racket sports, where balls often appear as streaks rather than distinct points. Existing labeling conventions mark the ball at…

Computer Vision and Pattern Recognition · Computer Science 2026-03-31 Thomas Gossard , Filip Radovic , Andreas Ziegler , Andreas Zell

In Intelligent Transportation System, real-time systems that monitor and analyze road users become increasingly critical as we march toward the smart city era. Vision-based frameworks for Object Detection, Multiple Object Tracking, and…

Computer Vision and Pattern Recognition · Computer Science 2019-06-02 Xiaohui Huang , Pan He , Anand Rangarajan , Sanjay Ranka

Rapid progress in adversarial learning has enabled the generation of realistic-looking fake visual content. To distinguish between fake and real visual content, several detection techniques have been proposed. The performance of most of…

Computer Vision and Pattern Recognition · Computer Science 2021-01-05 Bilal Yousaf , Muhammad Usama , Waqas Sultani , Arif Mahmood , Junaid Qadir

Scene text detection is still a challenging task, as there may be extremely small or low-resolution strokes, and close or arbitrary-shaped texts. In this paper, StrokeNet is proposed to effectively detect the texts by capturing the…

Computer Vision and Pattern Recognition · Computer Science 2021-11-24 Lei Li , Kai Fan , Chun Yuan

Existing matching-based approaches perform video object segmentation (VOS) via retrieving support features from a pixel-level memory, while some pixels may suffer from lack of correspondence in the memory (i.e., unseen), which inevitably…

Computer Vision and Pattern Recognition · Computer Science 2022-08-09 Hannan Lu , Zhi Tian , Lirong Yang , Haibing Ren , Wangmeng Zuo

Pose based hand gesture recognition has been widely studied in the recent years. Compared with full body action recognition, hand gesture involves joints that are more spatially closely distributed with stronger collaboration. This nature…

Computer Vision and Pattern Recognition · Computer Science 2021-01-25 Chuankun Li , Shuai Li , Yanbo Gao , Xiang Zhang , Wanqing Li

Automatically detecting and classifying strokes in table tennis video can streamline training workflows, enrich broadcast overlays, and enable fine-grained performance analytics. For this to be possible, annotated video data of table tennis…

Computer Vision and Pattern Recognition · Computer Science 2026-01-09 Moamal Fadhil Abdul-Mahdi , Jonas Bruun Hubrechts , Thomas Martini Jørgensen , Emil Hovad

Vessel segmentation in fundus is a key diagnostic capability in ophthalmology, and there are various challenges remained in this essential task. Early approaches indicate that it is often difficult to obtain desirable segmentation…

Computer Vision and Pattern Recognition · Computer Science 2020-01-17 Shaoming Zheng , Tianyang Zhang , Jiawei Zhuang , Hao Wang , Jiang Liu

Action recognition is an important research topic in computer vision. It is the basic work for visual understanding and has been applied in many fields. Since human actions can vary in different environments, it is difficult to infer…

Computer Vision and Pattern Recognition · Computer Science 2019-10-23 Dong Cao , Lisha Xu , Dongdong Zhang

Video analysis is a computer vision task that is useful for many applications like surveillance, human-machine interaction, and autonomous vehicles. Deep Convolutional Neural Networks (CNNs) are currently the state-of-the-art methods for…

Computer Vision and Pattern Recognition · Computer Science 2025-02-04 Mireille El-Assal , Pierre Tirilly , Ioan Marius Bilasco

Assessing an athlete's performance in canoe sprint is often established by measuring a variety of kinematic parameters during training sessions. Many of these parameters are related to single or multiple paddle stroke cycles. Determining…

Computer Vision and Pattern Recognition · Computer Science 2025-03-26 Sarah Rockstroh , Patrick Frenzel , Daniel Matthes , Kay Schubert , David Wollburg , Mirco Fuchs

In this paper, we present a two-stream multi-task network for fashion recognition. This task is challenging as fashion clothing always contain multiple attributes, which need to be predicted simultaneously for real-time industrial systems.…

Computer Vision and Pattern Recognition · Computer Science 2019-05-14 Peizhao Li , Yanjing Li , Xiaolong Jiang , Xiantong Zhen

The increasing number of surveillance cameras and security concerns have made automatic violent activity detection from surveillance footage an active area for research. Modern deep learning methods have achieved good accuracy in violence…

Computer Vision and Pattern Recognition · Computer Science 2022-11-09 Dipon Kumar Ghosh , Amitabha Chakrabarty