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Free-hand sketches are highly illustrative, and have been widely used by humans to depict objects or stories from ancient times to the present. The recent prevalence of touchscreen devices has made sketch creation a much easier task than…

Computer Vision and Pattern Recognition · Computer Science 2022-02-02 Peng Xu , Timothy M. Hospedales , Qiyue Yin , Yi-Zhe Song , Tao Xiang , Liang Wang

Unsupervised visual representation learning remains a largely unsolved problem in computer vision research. Among a big body of recently proposed approaches for unsupervised learning of visual representations, a class of self-supervised…

Computer Vision and Pattern Recognition · Computer Science 2019-01-28 Alexander Kolesnikov , Xiaohua Zhai , Lucas Beyer

Freehand sketches often contain sparse visual detail. In spite of the sparsity, they are easily and consistently recognized by humans across cultures, languages and age groups. Therefore, analyzing such sparse sketches can aid our…

Computer Vision and Pattern Recognition · Computer Science 2015-02-05 Ravi Kiran Sarvadevabhatla , R. Venkatesh Babu

Self-supervised representation learning methods aim to provide powerful deep feature learning without the requirement of large annotated datasets, thus alleviating the annotation bottleneck that is one of the main barriers to practical…

Machine Learning · Computer Science 2022-05-18 Linus Ericsson , Henry Gouk , Chen Change Loy , Timothy M. Hospedales

To see is to sketch -- free-hand sketching naturally builds ties between human and machine vision. In this paper, we present a novel approach for translating an object photo to a sketch, mimicking the human sketching process. This is an…

Computer Vision and Pattern Recognition · Computer Science 2018-05-02 Jifei Song , Kaiyue Pang , Yi-Zhe Song , Tao Xiang , Timothy Hospedales

Parsing sketches via semantic segmentation is attractive but challenging, because (i) free-hand drawings are abstract with large variances in depicting objects due to different drawing styles and skills; (ii) distorting lines drawn on the…

Computer Vision and Pattern Recognition · Computer Science 2019-10-15 Junkun Jiang , Ruomei Wang , Shujin Lin , Fei Wang

In this paper, we study learning semantic representations for million-scale free-hand sketches. This is highly challenging due to the domain-unique traits of sketches, e.g., diverse, sparse, abstract, noisy. We propose a dual-branch CNNRNN…

Computer Vision and Pattern Recognition · Computer Science 2020-07-09 Peng Xu , Yongye Huang , Tongtong Yuan , Tao Xiang , Timothy M. Hospedales , Yi-Zhe Song , Liang Wang

Face sketch synthesis has made great progress in the past few years. Recent methods based on deep neural networks are able to generate high quality sketches from face photos. However, due to the lack of training data (photo-sketch pairs),…

Computer Vision and Pattern Recognition · Computer Science 2019-05-07 Chaofeng Chen , Wei Liu , Xiao Tan , Kwan-Yee K. Wong

Recently, self-supervised learning has attracted attention due to its remarkable ability to acquire meaningful representations for classification tasks without using semantic labels. This paper introduces a self-supervised learning…

Computer Vision and Pattern Recognition · Computer Science 2022-02-09 Hyungtae Lee , Heesung Kwon

Self-supervised learning has gained prominence due to its efficacy at learning powerful representations from unlabelled data that achieve excellent performance on many challenging downstream tasks. However supervision-free pre-text tasks…

Computer Vision and Pattern Recognition · Computer Science 2021-03-26 Ayan Kumar Bhunia , Pinaki Nath Chowdhury , Yongxin Yang , Timothy M. Hospedales , Tao Xiang , Yi-Zhe Song

This work aims to investigate the problem of 3D modeling using single free-hand sketches, which is one of the most natural ways we humans express ideas. Although sketch-based 3D modeling can drastically make the 3D modeling process more…

Multimedia · Computer Science 2023-12-08 Tianrun Chen , Chenglong Fu , Lanyun Zhu , Papa Mao , Jia Zhang , Ying Zang , Lingyun Sun

Deep neural networks need a big amount of training data, while in the real world there is a scarcity of data available for training purposes. To resolve this issue unsupervised methods are used for training with limited data. In this…

Computer Vision and Pattern Recognition · Computer Science 2022-02-10 Sayed Hashim , Muhammad Ali

In this paper, we propose a novel deep framework for part-level semantic parsing of freehand sketches, which makes three main contributions that are experimentally shown to have substantial practical merit. First, we propose a homogeneous…

Computer Vision and Pattern Recognition · Computer Science 2020-12-04 Ying Zheng , Hongxun Yao , Xiaoshuai Sun

Sketching is a natural and effective visual communication medium commonly used in creative processes. Recent developments in deep-learning models drastically improved machines' ability in understanding and generating visual content. An…

Human-Computer Interaction · Computer Science 2021-11-22 Forrest Huang , Eldon Schoop , David Ha , Jeffrey Nichols , John Canny

Recognizing freehand sketches with high arbitrariness is greatly challenging. Most existing methods either ignore the geometric characteristics or treat sketches as handwritten characters with fixed structural ordering. Consequently, they…

Computer Vision and Pattern Recognition · Computer Science 2017-08-10 Qi Jia , Meiyu Yu , Xin Fan , Haojie Li

We propose a multi-scale multi-channel deep neural network framework that, for the first time, yields sketch recognition performance surpassing that of humans. Our superior performance is a result of explicitly embedding the unique…

Computer Vision and Pattern Recognition · Computer Science 2015-07-22 Qian Yu , Yongxin Yang , Yi-Zhe Song , Tao Xiang , Timothy Hospedales

Sketch-based modeling strives to bring the ease and immediacy of drawing to the 3D world. However, while drawings are easy for humans to create, they are very challenging for computers to interpret due to their sparsity and ambiguity. We…

Graphics · Computer Science 2018-06-20 Johanna Delanoy , Mathieu Aubry , Phillip Isola , Alexei A. Efros , Adrien Bousseau

Sketches reflect the drawing style of individual artists; therefore, it is important to consider their unique styles when extracting sketches from color images for various applications. Unfortunately, most existing sketch extraction methods…

Computer Vision and Pattern Recognition · Computer Science 2024-07-22 Chang Wook Seo , Amirsaman Ashtari , Junyong Noh

In this paper, we study the problem of multi-view sketch correspondence, where we take as input multiple freehand sketches with different views of the same object and predict as output the semantic correspondence among the sketches. This…

Computer Vision and Pattern Recognition · Computer Science 2020-08-12 Deng Yu , Lei Li , Youyi Zheng , Manfred Lau , Yi-Zhe Song , Chiew-Lan Tai , Hongbo Fu

Self-supervised learning has recently emerged as a strong alternative in document analysis. These approaches are now capable of learning high-quality image representations and overcoming the limitations of supervised methods, which require…

Computer Vision and Pattern Recognition · Computer Science 2024-04-30 Marwa Dhiaf , Mohamed Ali Souibgui , Kai Wang , Yuyang Liu , Yousri Kessentini , Alicia Fornés , Ahmed Cheikh Rouhou
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