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A novel method to convert color/multi-spectral images to gray-level images is introduced to increase the performance of document binarization methods. The method uses the distribution of the pixel data of the input document image in a color…

Computer Vision and Pattern Recognition · Computer Science 2013-06-27 Reza Farrahi Moghaddam , Shaohua Chen , Rachid Hedjam , Mohamed Cheriet

Depth estimation from a single image is of paramount importance in the realm of computer vision, with a multitude of applications. Conventional methods suffer from the trade-off between consistency and fine-grained details due to the…

Computer Vision and Pattern Recognition · Computer Science 2023-09-19 Md Awsafur Rahman , Shaikh Anowarul Fattah

Document image binarization is the initial step and a crucial in many document analysis and recognition scheme. In fact, it is still a relevant research subject and a fundamental challenge due to its importance and influence. This paper…

Computer Vision and Pattern Recognition · Computer Science 2019-01-29 Omar Boudraa , Walid Khaled Hidouci , Dominique Michelucci

We here propose a novel hierarchical transformer model that adeptly integrates the feature extraction capabilities of Convolutional Neural Networks (CNNs) with the advanced representational potential of Vision Transformers (ViTs).…

Computer Vision and Pattern Recognition · Computer Science 2024-07-22 Xiaoya Tang , Bodong Zhang , Beatrice S. Knudsen , Tolga Tasdizen

Despite the tremendous progress in zero-shot learning(ZSL), the majority of existing methods still rely on human-annotated attributes, which are difficult to annotate and scale. An unsupervised alternative is to represent each class using…

Computer Vision and Pattern Recognition · Computer Science 2022-09-22 Muhammad Ferjad Naeem , Yongqin Xian , Luc Van Gool , Federico Tombari

Local Binary Descriptors are becoming more and more popular for image matching tasks, especially when going mobile. While they are extensively studied in this context, their ability to carry enough information in order to infer the original…

Computer Vision and Pattern Recognition · Computer Science 2012-11-07 Emmanuel d'Angelo , Laurent jacques , Alexandre Alahi , Pierre Vandergheynst

Both fine-grained discriminative details and global semantic features can contribute to solving person re-identification challenges, such as occlusion and pose variations. Vision foundation models (\textit{e.g.}, DINO) excel at mining local…

Computer Vision and Pattern Recognition · Computer Science 2026-02-03 Ying Shu , Pujian Zhan , Huiqi Yang , Hehe Fan , Youfang Lin , Kai Lv

We present DocFormer -- a multi-modal transformer based architecture for the task of Visual Document Understanding (VDU). VDU is a challenging problem which aims to understand documents in their varied formats (forms, receipts etc.) and…

Computer Vision and Pattern Recognition · Computer Science 2021-09-21 Srikar Appalaraju , Bhavan Jasani , Bhargava Urala Kota , Yusheng Xie , R. Manmatha

This paper presents a novel iterative deep learning framework and apply it for document enhancement and binarization. Unlike the traditional methods which predict the binary label of each pixel on the input image, we train the neural…

Computer Vision and Pattern Recognition · Computer Science 2019-01-21 Sheng He , Lambert Schomaker

Deep neural networks for real-time video matting suffer significant computational limitations on edge devices, hindering their adoption in widespread applications such as online conferences and short-form video production. Binarization…

Computer Vision and Pattern Recognition · Computer Science 2025-07-08 Haotong Qin , Xianglong Liu , Xudong Ma , Lei Ke , Yulun Zhang , Jie Luo , Michele Magno

The binarization of vision transformers (ViTs) offers a promising approach to addressing the trade-off between high computational/storage demands and the constraints of edge-device deployment. However, existing binary ViT methods often…

Computer Vision and Pattern Recognition · Computer Science 2025-07-15 Tian Gao , Zhiyuan Zhang , Kaijie Yin , Xu-Cheng Zhong , Hui Kong

Prior works have proposed several strategies to reduce the computational cost of self-attention mechanism. Many of these works consider decomposing the self-attention procedure into regional and local feature extraction procedures that each…

Computer Vision and Pattern Recognition · Computer Science 2022-07-13 Ting Yao , Yehao Li , Yingwei Pan , Yu Wang , Xiao-Ping Zhang , Tao Mei

Currently, vision encoder models like Vision Transformers (ViTs) typically excel at image recognition tasks but cannot simultaneously support text recognition like human visual recognition. To address this limitation, we propose UNIT, a…

Computer Vision and Pattern Recognition · Computer Science 2024-09-09 Yi Zhu , Yanpeng Zhou , Chunwei Wang , Yang Cao , Jianhua Han , Lu Hou , Hang Xu

Vision transformers have achieved remarkable progress in vision tasks such as image classification and detection. However, in instance-level image retrieval, transformers have not yet shown good performance compared to convolutional…

Computer Vision and Pattern Recognition · Computer Science 2022-10-24 Chull Hwan Song , Jooyoung Yoon , Shunghyun Choi , Yannis Avrithis

Lossy image compression is generally formulated as a joint rate-distortion optimization to learn encoder, quantizer, and decoder. However, the quantizer is non-differentiable, and discrete entropy estimation usually is required for rate…

Computer Vision and Pattern Recognition · Computer Science 2017-09-20 Mu Li , Wangmeng Zuo , Shuhang Gu , Debin Zhao , David Zhang

As the core building block of vision transformers, attention is a powerful tool to capture long-range dependency. However, such power comes at a cost: it incurs a huge computation burden and heavy memory footprint as pairwise token…

Computer Vision and Pattern Recognition · Computer Science 2023-03-16 Lei Zhu , Xinjiang Wang , Zhanghan Ke , Wayne Zhang , Rynson Lau

We propose DocFormerv2, a multi-modal transformer for Visual Document Understanding (VDU). The VDU domain entails understanding documents (beyond mere OCR predictions) e.g., extracting information from a form, VQA for documents and other…

Computer Vision and Pattern Recognition · Computer Science 2023-06-05 Srikar Appalaraju , Peng Tang , Qi Dong , Nishant Sankaran , Yichu Zhou , R. Manmatha

The efficient extraction of text information from the background in degraded color document images is an important challenge in the preservation of ancient manuscripts. The imperfect preservation of ancient manuscripts has led to different…

Computer Vision and Pattern Recognition · Computer Science 2026-02-06 Rui-Yang Ju , Yu-Shian Lin , Yanlin Jin , Chih-Chia Chen , Chun-Tse Chien , Jen-Shiun Chiang

Instance-level segmentation of documents consists in assigning a class-aware and instance-aware label to each pixel of the image. It is a key step in document parsing for their understanding. In this paper, we present a unified transformer…

Computer Vision and Pattern Recognition · Computer Science 2023-09-12 Ayan Banerjee , Sanket Biswas , Josep Lladós , Umapada Pal

Despite the widespread adoption of transformers in medical applications, the exploration of multi-scale learning through transformers remains limited, while hierarchical representations are considered advantageous for computer-aided medical…

Computer Vision and Pattern Recognition · Computer Science 2025-06-17 Xiaoya Tang , Bodong Zhang , Man Minh Ho , Beatrice S. Knudsen , Tolga Tasdizen