University of Ljubljana(卢布尔雅那大学);IIT Kharagpur(印度理工学院卡哈拉格普尔分校);University of Colorado Colorado Springs(科罗拉多大学科罗拉多斯普林斯分校);Islamic Azad University(伊斯兰阿扎德大学);Imperial College London(帝国理工学院);ITU Department of Computer Engineering(伊斯坦布尔技术大学计算机工程系)
Žiga Emeršič, Dejan Štepec, Vitomir Štruc, Peter Peer, Anjith George, Adil Ahmad, Elshibani Omar, Terrance E. Boult, Reza Safdari, Yuxiang Zhou, Stefanos Zafeir… 展开作者
Žiga Emeršič, Dejan Štepec, Vitomir Štruc, Peter Peer, Anjith George, Adil Ahmad, Elshibani Omar, Terrance E. Boult, Reza Safdari, Yuxiang Zhou, Stefanos Zafeiriou, Dogucan Yaman, Fevziye I. Eyiokur, Hazim K. Ekenel
In this paper we present the results of the Unconstrained Ear Recognition Challenge (UERC), a group benchmarking effort centered around the problem of person recognition from ear images captured in uncontrolled conditions. The goal of the challenge was to assess the performance of existing ear recognition techniques on a challenging large-scale dataset and identify open problems that need to be addressed in the future. Five groups from three continents participated in the challenge and contributed six ear recognition techniques for the evaluation, while multiple baselines were made available for the challenge by the UERC organizers. A comprehensive analysis was conducted with all participating approaches addressing essential research questions pertaining to the sensitivity of the technology to head rotation, flipping, gallery size, large-scale recognition and others. The top performer of the UERC was found to ensure robust performance on a smaller part of the dataset (with 180 subjects) regardless of image characteristics, but still exhibited a significant performance drop when the entire dataset comprising 3,704 subjects was used for testing.
In this paper, we introduce a new benchmark dataset for the challenging writing in the air (WiTA) task -- an elaborate task bridging vision and NLP. WiTA implements an intuitive and natural writing method with finger movement for human-computer interaction (HCI). Our WiTA dataset will facilitate the development of data-driven WiTA systems which thus far have displayed unsatisfactory performance -- due to lack of dataset as well as traditional statistical models they have adopted. Our dataset consists of five sub-datasets in two languages (Korean and English) and amounts to 209,926 video instan…
ImmerIris: A Large-Scale Dataset and Benchmark for Off-Axis and Unconstrained Iris Recognition in Immersive Applications
Shanghai Key Lab of Intelligent Information Processing(上海智能信息处理关键实验室);Fudan University(复旦大学);Huaiyin Normal University(淮阴师范学院);Zhengzhou University of Light Industry(郑州轻工业学院);Tongji University(同济大学)
Existing approaches for image-based Automatic Meter Reading (AMR) have been evaluated on images captured in well-controlled scenarios. However, real-world meter reading presents unconstrained scenarios that are way more challenging due to dirt, various lighting conditions, scale variations, in-plane and out-of-plane rotations, among other factors. In this work, we present an end-to-end approach for AMR focusing on unconstrained scenarios. Our main contribution is the insertion of a new stage in the AMR pipeline, called corner detection and counter classification, which enables the counter regi…
The Unconstrained Ear Recognition Challenge 2019 - ArXiv Version With Appendix
University of Ljubljana(卢布尔雅那大学);Nitte Mahalinga Adyanthaya Memorial Institute of Technology(尼特·马哈林加·阿迪扬塔亚纪念理工学院);Jagadguru Sri Shivarathreeshwara Science & Technology University(贾伽杜古鲁·斯里·希瓦拉特里什瓦拉科技大学);Research an Academic Computer Network(研究与学术计算机网络);Warsaw University of Technology(华沙理工大学);University of South Florida(南佛罗里达大学);Federal University of Bahia(巴伊亚联邦大学);Korea Institute of Science and Technology(韩国科学技术院);Indian Insti(印度理工)
Beyond Frontal Faces: Improving Person Recognition Using Multiple Cues
UC Berkeley(加州大学伯克利分校);Facebook AI Research(Facebook人工智能研究院)
我们探讨了在一个不受约束的设置中识别相册中的人的身份的任务。为了促进这一点,我们介绍了新的人在相册(PIPA)数据集,包括超过60000个实例的2000个人从公共Flickr相册收集。由于只有大约一半的人的图像包含正面的脸,识别任务是非常具有挑战性的,由于姿势,服装,相机的观点,图像分辨率和照明的大变化。我们提出了Pose Invariant PErson Recognition(PIPER)方法,该方法积累了由深度卷积网络训练的poselet级别的人识别器的线索,以折扣姿态变化,结合面部识别器和全局识别器。在三种不同设置上的实验证实,在我们的无约束设置中,PIPER显着提高了DeepFace的性能,DeepFace是在LFW数据集上测量的最佳人脸识别器之一。
Universidad de Buenos Aires(布宜诺斯艾利斯大学);Universidad Nacional de Luján(国立卢汉大学)
The detection and recognition of unconstrained text is an open problem in research. Text in comic books has unusual styles that raise many challenges for text detection. This work aims to binarize text in a comic genre with highly sophisticated text styles: Japanese manga. To overcome the lack of a manga dataset with text annotations at a pixel level, we create our own. To improve the evaluation and search of an optimal model, in addition to standard metrics in binarization, we implement other special metrics. Using these resources, we designed and evaluated a deep network model, outperforming…
Hangzhou Dianzi University(杭州电子科技大学);Explore Academy of JD.com(京东探索研究院)
Existing studies for gait recognition are dominated by 2D representations like the silhouette or skeleton of the human body in constrained scenes. However, humans live and walk in the unconstrained 3D space, so projecting the 3D human body onto the 2D plane will discard a lot of crucial information like the viewpoint, shape, and dynamics for gait recognition. Therefore, this paper aims to explore dense 3D representations for gait recognition in the wild, which is a practical yet neglected problem. In particular, we propose a novel framework to explore the 3D Skinned Multi-Person Linear (SMPL) …
University Paris-Est Créteil(巴黎东克雷泰伊大学);University Paris City(巴黎城市大学);Istanbul Technical University(伊斯坦布尔理工大学);National Institute of Technology Warangal(瓦朗加尔国家技术学院);The National Engineering School of Sfax(斯法克斯国家工程师学院);French National Centre for Scientific Research(法国国家科学研究中心)
POST-traumatic stress disorder (PTSD) is a chronic and debilitating mental condition that is developed in response to catastrophic life events, such as military combat, sexual assault, and natural disasters. PTSD is characterized by flashbacks of past traumatic events, intrusive thoughts, nightmares, hypervigilance, and sleep disturbance, all of which affect a person's life and lead to considerable social, occupational, and interpersonal dysfunction. The diagnosis of PTSD is done by medical professionals using self-assessment questionnaire of PTSD symptoms as defined in the Diagnostic and Stat…
Federal University of Paraná (UFPR)(巴拉那联邦大学(UFPR));Pontifical Catholic University of Paraná (PUCPR)(巴拉那天主教大学(PUCPR))
Recently, ocular biometrics in unconstrained environments using images obtained at visible wavelength have gained the researchers' attention, especially with images captured by mobile devices. Periocular recognition has been demonstrated to be an alternative when the iris trait is not available due to occlusions or low image resolution. However, the periocular trait does not have the high uniqueness presented in the iris trait. Thus, the use of datasets containing many subjects is essential to assess biometric systems' capacity to extract discriminating information from the periocular region. …
Handwritten character recognition is an active research challenge,especially for Indian scripts. This paper deals with handwritten Malayalam, with a complete set of basic characters, vowel and consonant signs and compound characters that may be present in the script. Spatial domain features suitable for recognition are chosen in this work. For classification, k-NN, SVM and ELM are employed
University of Rouen Normandy(鲁昂诺曼底大学);Normandie Université(诺曼底大学);INSA Rouen Normandy(鲁昂诺曼底国立应用科学学院)
Unconstrained handwritten text recognition is a challenging computer vision task. It is traditionally handled by a two-step approach, combining line segmentation followed by text line recognition. For the first time, we propose an end-to-end segmentation-free architecture for the task of handwritten document recognition: the Document Attention Network. In addition to text recognition, the model is trained to label text parts using begin and end tags in an XML-like fashion. This model is made up of an FCN encoder for feature extraction and a stack of transformer decoder layers for a recurrent t…
Although significant advances have been made in face recognition (FR), FR in unconstrained environments remains challenging due to the domain gap between the semi-constrained training datasets and unconstrained testing scenarios. To address this problem, we propose a controllable face synthesis model (CFSM) that can mimic the distribution of target datasets in a style latent space. CFSM learns a linear subspace with orthogonal bases in the style latent space with precise control over the diversity and degree of synthesis. Furthermore, the pre-trained synthesis model can be guided by the FR mod…
In recent years, significant progress has been made in face recognition, which can be partially attributed to the availability of large-scale labeled face datasets. However, since the faces in these datasets usually contain limited degree and types of variation, the resulting trained models generalize poorly to more realistic unconstrained face datasets. While collecting labeled faces with larger variations could be helpful, it is practically infeasible due to privacy and labor cost. In comparison, it is easier to acquire a large number of unlabeled faces from different domains, which could be…
Normandie University(诺曼底大学);University of Rouen(鲁昂大学)
Unconstrained handwritten text recognition remains an important challenge for deep neural networks. These last years, recurrent networks and more specifically Long Short-Term Memory networks have achieved state-of-the-art performance in this field. Nevertheless, they are made of a large number of trainable parameters and training recurrent neural networks does not support parallelism. This has a direct influence on the training time of such architectures, with also a direct consequence on the time required to explore various architectures. Recently, recurrence-free architectures such as Fully …
Normandie University(诺曼底大学);University of Rouen(鲁昂大学)
Unconstrained handwritten text recognition is a major step in most document analysis tasks. This is generally processed by deep recurrent neural networks and more specifically with the use of Long Short-Term Memory cells. The main drawbacks of these components are the large number of parameters involved and their sequential execution during training and prediction. One alternative solution to using LSTM cells is to compensate the long time memory loss with an heavy use of convolutional layers whose operations can be executed in parallel and which imply fewer parameters. In this paper we presen…
Unconstrained Face Detection and Open-Set Face Recognition Challenge
University of Colorado Colorado Springs(科罗拉多大学科罗拉多斯普林斯分校);Carnegie Mellon University(卡内基梅隆大学);Karlsruhe Institute of Technology(卡尔斯鲁厄理工学院);University of Surrey(萨里大学);West Virginia University(西弗吉尼亚大学);University of Wolverhampton(伍尔弗汉普顿大学)
The Impact of Preprocessing on Deep Representations for Iris Recognition on Unconstrained Environments
Federal University of Paraná (UFPR)(巴拉那联邦大学);Federal University of Ouro Preto (UFOP)(欧鲁普雷图联邦大学);Pontifical Catholic University of Paraná (PUCPR)(巴拉那天主教大学)
Multi-Prototype Networks for Unconstrained Set-based Face Recognition
National University of Singapore(新加坡国立大学);National University of Defense Technology(国防科技大学);Tencent FiT DeepSea AI Lab(腾讯FiT深海人工智能实验室);University of Electronic Science and Technology of China(电子科技大学);Inception Institute of Artificial Intelligence(人工智能初创研究所);Institute of Automation, Chinese Academy of Sciences(中国科学院自动化研究所);Qihoo 360 AI Institute(奇虎360人工智能研究院)
Real-world face recognition applications often deal with suboptimal image quality or resolution due to different capturing conditions such as various subject-to-camera distances, poor camera settings, or motion blur. This characteristic has an unignorable effect on performance. Recent cross-resolution face recognition approaches used simple, arbitrary, and unrealistic down- and up-scaling techniques to measure robustness against real-world edge-cases in image quality. Thus, we propose a new standardized benchmark dataset and evaluation protocol derived from the famous Labeled Faces in the Wild…
DropSample: A New Training Method to Enhance Deep Convolutional Neural Networks for Large-Scale Unconstrained Handwritten Chinese Character Recognition
South China University of Technology(华南理工大学);University of Technology, Sydney(悉尼科技大学)
AInnovation Technology Co., Ltd.(创新奇智科技有限公司);Nanjing University of Posts and Telecommunications(南京邮电大学)
Benefiting from the rapid development of convolutional neural networks, the performance of car license plate detection and recognition has been largely improved. Nonetheless, most existing methods solve detection and recognition problems separately, and focus on specific scenarios, which hinders the deployment for real-world applications. To overcome these challenges, we present an efficient and accurate framework to solve the license plate detection and recognition tasks simultaneously. It is a lightweight and unified deep neural network, that can be optimized end-to-end and work in real-time…
Cross-Age LFW: A Database for Studying Cross-Age Face Recognition in Unconstrained Environments
Beijing University of Posts and Telecommunications(北京邮电大学)
Labeled Faces in the Wild(LFW)数据库已被广泛用作无约束人脸验证的基准,并且由于大数据驱动的机器学习方法,在数据库上的性能接近100%。然而,我们认为,这种准确性可能过于乐观,因为一些限制因素。除了不同的姿态、光照、遮挡和表情,跨年龄人脸是人脸识别的另一个挑战。同一个人的不同年龄会导致类内差异很大,在真实世界的人脸验证中,老化过程是不可避免的。然而,LFW对此并没有太多关注,因此我们构建了一个跨年龄LFW(CALFW),该算法故意搜索并选择3,000个具有年龄差距的积极面孔对来添加衰老过程的类内方差。该方法还选择了同性别、同种族的阴性对,减少了阳性/阴性对属性差异的影响,实现了人脸验证而非属性分类。我们在新数据库上评估了几种度量学习和深度学习方法。与LFW相比,CALFW的精度下降了10%-17%。
Center for Pattern Recognition and Machine Intelligence, PES University(PES大学模式识别与机器智能中心)
The paper posits a computationally-efficient algorithm for multi-class facial image classification in which images are constrained with translation, rotation, scale, color, illumination and affine distortion. The proposed method is divided into five main building blocks including Haar-Cascade for face detection, Bilateral Filter for image preprocessing to remove unwanted noise, Affine Speeded-Up Robust Features (ASURF) for keypoint detection and description, Vector of Locally Aggregated Descriptors (VLAD) for feature quantization and Cloud Forest for image classification. The proposed method a…