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Handwriting authentication is a valuable tool used in various fields, such as fraud prevention and cultural heritage protection. However, it remains a challenging task due to the complex features, severe damage, and lack of supervision. In…

计算机视觉与模式识别 · 计算机科学 2023-07-24 Jingyao Wang , Luntian Mou , Changwen Zheng , Wen Gao

Recognizing handwritten mathematical expressions (HMER) is a challenging task due to the inherent two-dimensional structure, varying symbol scales, and complex spatial relationships among symbols. In this paper, we present a self-supervised…

计算机视觉与模式识别 · 计算机科学 2025-09-01 Shree Mitra , Ritabrata Chakraborty , Nilkanta Sahu

Handwritten signature verification poses a formidable challenge in biometrics and document authenticity. The objective is to ascertain the authenticity of a provided handwritten signature, distinguishing between genuine and forged ones.…

计算机视觉与模式识别 · 计算机科学 2024-01-19 Fatih Ozyurt , Jafar Majidpour , Tarik A. Rashid , Canan Koc

We present SSL-HV: Self-Supervised Learning approaches applied to the task of Handwriting Verification. This task involves determining whether a given pair of handwritten images originate from the same or different writer distribution. We…

计算机视觉与模式识别 · 计算机科学 2024-08-02 Mihir Chauhan , Mohammad Abuzar Hashemi , Abhishek Satbhai , Mir Basheer Ali , Bina Ramamurthy , Mingchen Gao , Siwei Lyu , Sargur Srihari

Offline Signature Verification (OSV) is a fundamental biometric task across various forensic, commercial and legal applications. The underlying task at hand is to carefully model fine-grained features of the signatures to distinguish…

计算机视觉与模式识别 · 计算机科学 2022-06-28 Soumitri Chattopadhyay , Siladittya Manna , Saumik Bhattacharya , Umapada Pal

Writer independent offline signature verification is one of the most challenging tasks in pattern recognition as there is often a scarcity of training data. To handle such data scarcity problem, in this paper, we propose a novel…

计算机视觉与模式识别 · 计算机科学 2022-07-13 Siladittya Manna , Soumitri Chattopadhyay , Saumik Bhattacharya , Umapada Pal

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…

计算机视觉与模式识别 · 计算机科学 2020-12-04 Ying Zheng , Hongxun Yao , Xiaoshuai Sun

Automated signature verification is a critical biometric technique used in banking, identity authentication, and legal documentation. Despite the notable progress achieved by deep learning methods, most approaches in offline signature…

计算机视觉与模式识别 · 计算机科学 2025-10-21 Matheus Ramos Parracho

Offline Handwritten Signature verification presents a challenging Pattern Recognition problem, where only knowledge of the positive class is available for training. While classifiers have access to a few genuine signatures for training,…

计算机视觉与模式识别 · 计算机科学 2019-10-18 Luiz G. Hafemann , Robert Sabourin , Luiz S. Oliveira

Deep learning has become a breathtaking technology in the last years, overcoming traditional handcrafted approaches and even humans for many different tasks. However, in some tasks, such as the verification of handwritten signatures, the…

计算机视觉与模式识别 · 计算机科学 2021-01-26 Ruben Tolosana , Ruben Vera-Rodriguez , Julian Fierrez , Javier Ortega-Garcia

Fingerprint recognition stands as a pivotal component of biometric technology, with diverse applications from identity verification to advanced search tools. In this paper, we propose a unique method for deriving robust fingerprint…

计算机视觉与模式识别 · 计算机科学 2025-05-23 Ekta Gavas , Kaustubh Olpadkar , Anoop Namboodiri

In this paper, we tackle for the first time, the problem of self-supervised representation learning for free-hand sketches. This importantly addresses a common problem faced by the sketch community -- that annotated supervisory data are…

计算机视觉与模式识别 · 计算机科学 2020-02-04 Peng Xu , Zeyu Song , Qiyue Yin , Yi-Zhe Song , Liang Wang

Airwriting Recognition is the problem of identifying letters written in free space with finger movement. It is essentially a specialized case of gesture recognition, wherein the vocabulary of gestures corresponds to letters as in a…

人机交互 · 计算机科学 2022-11-02 Ayush Tripathi , Arnab Kumar Mondal , Lalan Kumar , Prathosh A. P

The area of Handwritten Signature Verification has been broadly researched in the last decades, but remains an open research problem. In offline (static) signature verification, the dynamic information of the signature writing process is…

计算机视觉与模式识别 · 计算机科学 2019-01-23 Sourya Dipta Das , Himanshu Ladia , Vaibhav Kumar , Shivansh Mishra

Hand gesture serves as a crucial role during the expression of sign language. Current deep learning based methods for sign language understanding (SLU) are prone to over-fitting due to insufficient sign data resource and suffer limited…

计算机视觉与模式识别 · 计算机科学 2023-05-09 Hezhen Hu , Weichao Zhao , Wengang Zhou , Houqiang Li

Verifying the identity of a person using handwritten signatures is challenging in the presence of skilled forgeries, where a forger has access to a person's signature and deliberately attempt to imitate it. In offline (static) signature…

计算机视觉与模式识别 · 计算机科学 2017-05-17 Luiz G. Hafemann , Robert Sabourin , Luiz S. Oliveira

SigNet is a state of the art model for feature representation used for handwritten signature verification (HSV). This representation is based on a Deep Convolutional Neural Network (DCNN) and contains 2048 dimensions. When transposed to a…

计算机视觉与模式识别 · 计算机科学 2020-10-21 Victor L. F. Souza , Adriano L. I. Oliveira , Rafael M. O. Cruz , Robert Sabourin

Handwriting signatures, as an important means of identity recognition, are widely used in multiple fields such as financial transactions, commercial contracts and personal affairs due to their legal effect and uniqueness. In forensic…

计算机视觉与模式识别 · 计算机科学 2025-09-12 Wanghui Xiao

Hand gesture serves as a critical role in sign language. Current deep-learning-based sign language recognition (SLR) methods may suffer insufficient interpretability and overfitting due to limited sign data sources. In this paper, we…

计算机视觉与模式识别 · 计算机科学 2021-10-12 Hezhen Hu , Weichao Zhao , Wengang Zhou , Yuechen Wang , Houqiang Li

In this work, we explore massive pre-training on synthetic word images for enhancing the performance on four benchmark downstream handwriting analysis tasks. To this end, we build a large synthetic dataset of word images rendered in several…

计算机视觉与模式识别 · 计算机科学 2023-04-05 Vittorio Pippi , Silvia Cascianelli , Lorenzo Baraldi , Rita Cucchiara
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