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Deep learning models have grown increasingly popular in time series applications. However, the large quantity of newly proposed architectures, together with often contradictory empirical results, makes it difficult to assess which…

Machine Learning · Computer Science 2025-12-30 Valentina Moretti , Andrea Cini , Ivan Marisca , Cesare Alippi

Video anomaly detection deals with the recognition of abnormal events in videos. Apart from the visual signal, video anomaly detection has also been addressed with the use of skeleton sequences. We propose a holistic representation of…

Computer Vision and Pattern Recognition · Computer Science 2023-11-06 Alexandros Stergiou , Brent De Weerdt , Nikos Deligiannis

Projecting high-dimensional environment observations into lower-dimensional structured representations can considerably improve data-efficiency for reinforcement learning in domains with limited data such as robotics. Can a single generally…

In this paper, we present an approach for learning a visual representation from the raw spatiotemporal signals in videos. Our representation is learned without supervision from semantic labels. We formulate our method as an unsupervised…

Computer Vision and Pattern Recognition · Computer Science 2016-07-27 Ishan Misra , C. Lawrence Zitnick , Martial Hebert

Freehand line sketches are an interesting and unique form of visual representation. Typically, such sketches are studied and utilized as an end product of the sketching process. However, we have found it instructive to study the sketches as…

Computer Vision and Pattern Recognition · Computer Science 2015-02-03 Ravi Kiran Sarvadevabhatla , R. Venkatesh Babu

With recent advances in image-to-image translation tasks, remarkable progress has been witnessed in generating face images from sketches. However, existing methods frequently fail to generate images with details that are semantically and…

Computer Vision and Pattern Recognition · Computer Science 2023-02-09 Binxin Yang , Xuejin Chen , Chaoqun Wang , Chi Zhang , Zihan Chen , Xiaoyan Sun

This paper presents a novel free-hand sketch synthesis approach addressing explicit abstraction control in class-conditional and photo-to-sketch synthesis. Abstraction is a vital aspect of sketches, as it defines the fundamental distinction…

Computer Vision and Pattern Recognition · Computer Science 2023-06-16 Dar-Yen Chen

When we view visualizations, we not only have a visual representation of the data, but also a verbal one. Recent work has shown that these visual representations of data can be biased, such that the position of a line in a chart will be…

Human-Computer Interaction · Computer Science 2021-08-20 Cristina R. Ceja , Cindy Xiong

User Interface (UI) prototyping is a necessary step in the early stages of application development. Transforming sketches of a Graphical User Interface (UI) into a coded UI application is an uninspired but time-consuming task performed by a…

Computer Vision and Pattern Recognition · Computer Science 2019-10-22 Vanita Jain , Piyush Agrawal , Subham Banga , Rishabh Kapoor , Shashwat Gulyani

In this paper we tackle the problem of efficient video event detection. We argue that linear detection functions should be preferred in this regard due to their scalability and efficiency during estimation and evaluation. A popular approach…

Computer Vision and Pattern Recognition · Computer Science 2015-09-07 Iman Abbasnejad , Sridha Sridharan , Simon Denman , Clinton Fookes , Simon Lucey

Existing guidelines for categorical color selection are heuristic, often grounded in intuition rather than empirical studies of readers' abilities. While design conventions recommend palettes maximize hue differences, more recent…

Human-Computer Interaction · Computer Science 2024-05-24 Chin Tseng , Arran Zeyu Wang , Ghulam Jilani Quadri , Danielle Albers Szafir

Tensor network contraction is a fundamental mathematical operation that generalizes the dot product and matrix multiplication. It finds applications in numerous domains, such as database systems, graph theory, machine learning, probability…

Data Structures and Algorithms · Computer Science 2026-03-10 Mike Heddes , Igor Nunes , Tony Givargis , Alex Nicolau

Neural networks have been shown to be an effective tool for learning algorithms over graph-structured data. However, graph representation techniques---that convert graphs to real-valued vectors for use with neural networks---are still in…

Machine Learning · Computer Science 2018-10-10 Shaileshh Bojja Venkatakrishnan , Mohammad Alizadeh , Pramod Viswanath

Network representation is a crucial topic in historical social network analysis. The debate around their value and connotations, led by humanist scholars, is today more relevant than ever, seeing how common these representations are as…

Social and Information Networks · Computer Science 2022-01-25 Houda Lamqaddam , Inez De Prekel , Koenraad Brosens , Katrien Verbert

Text recognition in natural scene is a challenging problem due to the many factors affecting text appearance. In this paper, we presents a method that directly transcribes scene text images to text without needing of sophisticated character…

Computer Vision and Pattern Recognition · Computer Science 2016-01-07 Guo Qiang , Tu Dan , Li Guohui , Lei Jun

We introduce the novel problem of localizing all the instances of an object (seen or unseen during training) in a natural image via sketch query. We refer to this problem as sketch-guided object localization. This problem is distinctively…

Computer Vision and Pattern Recognition · Computer Science 2020-08-18 Aditay Tripathi , Rajath R Dani , Anand Mishra , Anirban Chakraborty

Deep networks have achieved excellent results in perceptual tasks, yet their ability to generalize to variations not seen during training has come under increasing scrutiny. In this work we focus on their ability to have invariance towards…

Computer Vision and Pattern Recognition · Computer Science 2019-12-30 Alex Lamb , Sherjil Ozair , Vikas Verma , David Ha

We introduce a new approach for applying sampling-based sketches to two and three mode tensors. We illustrate our technique to construct sketches for the classical problems of $\ell_0$ sampling and producing $\ell_1$ embeddings. In both…

Data Structures and Algorithms · Computer Science 2024-06-12 William Swartworth , David P. Woodruff

We propose a new video representation in terms of an over-segmentation of dense trajectories covering the whole video. Trajectories are often used to encode long-temporal information in several computer vision applications. Similar to…

Computer Vision and Pattern Recognition · Computer Science 2019-01-23 Ijaz Akhter , Cheong Loong Fah , Richard Hartley

The CNN-encoding of features from entire videos for the representation of human actions has rarely been addressed. Instead, CNN work has focused on approaches to fuse spatial and temporal networks, but these were typically limited to…

Computer Vision and Pattern Recognition · Computer Science 2016-11-22 Ali Diba , Vivek Sharma , Luc Van Gool