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This work explores the performance of a large video understanding foundation model on the downstream task of human fall detection on untrimmed video and leverages a pretrained vision transformer for multi-class action detection, with…

Computer Vision and Pattern Recognition · Computer Science 2024-01-30 Till Grutschus , Ola Karrar , Emir Esenov , Ekta Vats

Forgery operations on video contents are nowadays within the reach of anyone, thanks to the availability of powerful and user-friendly editing software. Integrity verification and authentication of videos represent a major interest in both…

Computer Vision and Pattern Recognition · Computer Science 2021-06-04 Sebastiano Verde , Paolo Bestagini , Simone Milani , Giancarlo Calvagno , Stefano Tubaro

Forensic analysis of digital photo provenance relies on intrinsic traces left in the photograph at the time of its acquisition. Such analysis becomes unreliable after heavy post-processing, such as down-sampling and re-compression applied…

Computer Vision and Pattern Recognition · Computer Science 2019-02-26 Pawel Korus , Nasir Memon

Due to the extensive use of video-sharing platforms and services for their storage, the amount of such media on the internet has become massive. This volume of data makes it difficult to control the kind of content that may be present in…

While many action recognition datasets consist of collections of brief, trimmed videos each containing a relevant action, videos in the real-world (e.g., on YouTube) exhibit very different properties: they are often several minutes long,…

Computer Vision and Pattern Recognition · Computer Science 2019-09-02 Bruno Korbar , Du Tran , Lorenzo Torresani

During the investigation of criminal activity when evidence is available, the issue at hand is determining the credibility of the video and ascertaining that the video is real. Today, one way to authenticate the footage is to identify the…

Computer Vision and Pattern Recognition · Computer Science 2022-10-18 Akash Nagaraj , Mukund Sood , Vivek Kapoor , Yash Mathur , Bishesh Sinha

Existing video captioning approaches typically require to first sample video frames from a decoded video and then conduct a subsequent process (e.g., feature extraction and/or captioning model learning). In this pipeline, manual frame…

Computer Vision and Pattern Recognition · Computer Science 2024-01-04 Yaojie Shen , Xin Gu , Kai Xu , Heng Fan , Longyin Wen , Libo Zhang

Video action recognition (VAR) is a primary task of video understanding, and untrimmed videos are more common in real-life scenes. Untrimmed videos have redundant and diverse clips containing contextual information, so sampling dense clips…

Computer Vision and Pattern Recognition · Computer Science 2021-04-22 Yunyan Hong , Ailing Zeng , Min Li , Cewu Lu , Li Jiang , Qiang Xu

The widespread availability of video recording through smartphones and digital devices has made video-based evidence more accessible than ever. Surveillance footage plays a crucial role in security, law enforcement, and judicial processes.…

A growing number of visual computing applications depend on the analysis of large video collections. The challenge is that scaling applications to operate on these datasets requires efficient systems for pixel data access and parallel…

Computer Vision and Pattern Recognition · Computer Science 2018-05-21 Alex Poms , Will Crichton , Pat Hanrahan , Kayvon Fatahalian

Deeplearning has been used to solve complex problems in various domains. As it advances, it also creates applications which become a major threat to our privacy, security and even to our Democracy. Such an application which is being…

Computer Vision and Pattern Recognition · Computer Science 2020-09-17 Rahul U , Ragul M , Raja Vignesh K , Tejeswinee K

Classifying videos into distinct categories, such as Sport and Music Video, is crucial for multimedia understanding and retrieval, especially when an immense volume of video content is being constantly generated. Traditional methods require…

Computer Vision and Pattern Recognition · Computer Science 2024-03-14 Yuxing Han , Yunan Ding , Chen Ye Gan , Jiangtao Wen

Visual content has become the primary source of information, as evident in the billions of images and videos, shared and uploaded on the Internet every single day. This has led to an increase in alterations in images and videos to make them…

Computer Vision and Pattern Recognition · Computer Science 2020-01-22 Prabhat Kumar , Mayank Vatsa , Richa Singh

Video forgery detection is becoming an important issue in recent years, because modern editing software provide powerful and easy-to-use tools to manipulate videos. In this paper we propose to perform detection by means of deep learning,…

Computer Vision and Pattern Recognition · Computer Science 2017-08-30 Dario D'Avino , Davide Cozzolino , Giovanni Poggi , Luisa Verdoliva

In this report, we introduce a video hashing method for scalable video segment copy detection. The objective of video segment copy detection is to find the video (s) present in a large database, one of whose segments (cropped in time) is a…

Machine Learning · Computer Science 2019-11-22 Arjun Krishna , A S Akil Arif Ibrahim

We present pure-transformer based models for video classification, drawing upon the recent success of such models in image classification. Our model extracts spatio-temporal tokens from the input video, which are then encoded by a series of…

Computer Vision and Pattern Recognition · Computer Science 2021-11-02 Anurag Arnab , Mostafa Dehghani , Georg Heigold , Chen Sun , Mario Lučić , Cordelia Schmid

By applying artificial intelligence to image editing technology, it has become possible to generate high-quality images with minimal traces of manipulation. However, since these technologies can be misused for criminal activities such as…

Multimedia · Computer Science 2023-09-01 Jiwon Lee , Seungjae Jeon , Yunji Park , Jaehyun Chung , Doowon Jeong

Video feeds are often deliberately used as evidence, as in the case of CCTV footage; but more often than not, the existence of footage of a supposed event is perceived as proof of fact in the eyes of the public at large. This reliance…

Cryptography and Security · Computer Science 2020-05-20 Mansoor Ahmed-Rengers

Fake videos represent an important misinformation threat. While existing forensic networks have demonstrated strong performance on image forgeries, recent results reported on the Adobe VideoSham dataset show that these networks fail to…

Computer Vision and Pattern Recognition · Computer Science 2023-03-14 Tai D. Nguyen , Shengbang Fang , Matthew C. Stamm

Cloud computing has been regarded as the technology enabler for the Internet of Things (IoT). To ensure the most effective collection of IoT-based evidence, it is vital for forensic practitioners to possess a contemporary understanding of…

Cryptography and Security · Computer Science 2017-07-18 Teing Yee Yang , Ali Dehghantanha , Kim-Kwang Raymond Choo , Zaiton Muda