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We present a novel hierarchical spatiotemporal action tokenizer for in-context imitation learning. We first propose a hierarchical approach, which consists of two successive levels of vector quantization. In particular, the lower level…

Cross-modal retrieval between videos and texts has attracted growing attentions due to the rapid emergence of videos on the web. The current dominant approach for this problem is to learn a joint embedding space to measure cross-modal…

Computer Vision and Pattern Recognition · Computer Science 2020-03-03 Shizhe Chen , Yida Zhao , Qin Jin , Qi Wu

Continuous Sign Language Recognition (CSLR) is a challenging research task due to the lack of accurate annotation on the temporal sequence of sign language data. The recent popular usage is a hybrid model based on "CNN + RNN" for CSLR.…

Computer Vision and Pattern Recognition · Computer Science 2022-08-17 Qidan Zhu , Jing Li , Fei Yuan , Quan Gan

Hand gesture-based Sign Language Recognition (SLR) serves as a crucial communication bridge between deaf and non-deaf individuals. While Graph Convolutional Networks (GCNs) are common, they are limited by their reliance on fixed skeletal…

Computer Vision and Pattern Recognition · Computer Science 2025-11-11 Koki Hirooka , Abu Saleh Musa Miah , Tatsuya Murakami , Md. Al Mehedi Hasan , Yong Seok Hwang , Jungpil Shin

Continuous sign language recognition (CSLR) requires precise spatio-temporal modeling to accurately recognize sequences of gestures in videos. Existing frameworks often rely on CNN-based spatial backbones combined with temporal convolution…

Computer Vision and Pattern Recognition · Computer Science 2025-12-30 Ahmed Abul Hasanaath , Hamzah Luqman

Skeleton-aware sign language recognition (SLR) has gained popularity due to its ability to remain unaffected by background information and its lower computational requirements. Current methods utilize spatial graph modules and temporal…

Computer Vision and Pattern Recognition · Computer Science 2024-03-20 Lianyu Hu , Liqing Gao , Zekang Liu , Wei Feng

Sign Language Translation (SLT) is a challenging task that aims to generate spoken language sentences from sign language videos, both of which have different grammar and word/gloss order. From a Neural Machine Translation (NMT) perspective,…

Computer Vision and Pattern Recognition · Computer Science 2023-08-21 Ozge Mercanoglu Sincan , Necati Cihan Camgoz , Richard Bowden

Hierarchical text classification is a challenging subtask of multi-label classification due to its complex label hierarchy. Existing methods encode text and label hierarchy separately and mix their representations for classification, where…

Computation and Language · Computer Science 2022-03-24 Zihan Wang , Peiyi Wang , Lianzhe Huang , Xin Sun , Houfeng Wang

Hierarchical Text Classification (HTC) aims to categorize text data based on a structured label hierarchy, resulting in predicted labels forming a sub-hierarchy tree. The semantics of the text should align with the semantics of the labels…

Computation and Language · Computer Science 2024-09-04 Ashish Kumar , Durga Toshniwal

Gloss-free Sign Language Translation (SLT) has advanced rapidly, achieving strong performances without relying on gloss annotations. However, these gains have often come with increased model complexity and high computational demands,…

Computer Vision and Pattern Recognition · Computer Science 2026-05-29 JianHe Low , Ozge Mercanoglu Sincan , Richard Bowden

We introduce the problem of zero-shot sign language recognition (ZSSLR), where the goal is to leverage models learned over the seen sign class examples to recognize the instances of unseen signs. To this end, we propose to utilize the…

Computer Vision and Pattern Recognition · Computer Science 2019-07-25 Yunus Can Bilge , Nazli Ikizler-Cinbis , Ramazan Gokberk Cinbis

Scene text recognition (STR) enables computers to recognize and read the text in various real-world scenes. Recent STR models benefit from taking linguistic information in addition to visual cues into consideration. We propose a novel…

Computer Vision and Pattern Recognition · Computer Science 2022-11-10 Jie Wu , Ying Peng , Shengming Zhang , Weigang Qi , Jian Zhang

Sign Language Recognition (SLR) systems aim to be embedded in video stream platforms to recognize the sign performed in front of a camera. SLR research has taken advantage of recent advances in pose estimation models to use skeleton…

Computer Vision and Pattern Recognition · Computer Science 2023-04-13 David Laines , Gissella Bejarano , Miguel Gonzalez-Mendoza , Gilberto Ochoa-Ruiz

Gloss-free sign language translation (SLT) aims to develop well-performing SLT systems with no requirement for the costly gloss annotations, but currently still lags behind gloss-based approaches significantly. In this paper, we identify a…

Computer Vision and Pattern Recognition · Computer Science 2024-10-30 Jinhui Ye , Xing Wang , Wenxiang Jiao , Junwei Liang , Hui Xiong

Our aim is to develop a unified model for sign language understanding, that performs sign language translation (SLT) and sign-subtitle alignment (SSA). Together, these two tasks enable the conversion of continuous signing videos into spoken…

Computer Vision and Pattern Recognition · Computer Science 2025-12-10 Youngjoon Jang , Liliane Momeni , Zifan Jiang , Joon Son Chung , Gül Varol , Andrew Zisserman

Sign Language Translation (SLT) aims to convert sign language videos into spoken or written text. While early systems relied on gloss annotations as an intermediate supervision, such annotations are costly to obtain and often fail to…

Computer Vision and Pattern Recognition · Computer Science 2025-07-15 Ozge Mercanoglu Sincan , Richard Bowden

Hierarchical text classification (HTC) is a special sub-task of multi-label classification (MLC) whose taxonomy is constructed as a tree and each sample is assigned with at least one path in the tree. Latest HTC models contain three…

Computation and Language · Computer Science 2024-08-13 Zhijian Chen , Zhonghua Li , Jianxin Yang , Ye Qi

Sign Language Translation (SLT) aims to convert sign language (SL) videos into spoken language text, thereby bridging the communication gap between the sign and the spoken community. While most existing works focus on translating a single…

Computation and Language · Computer Science 2025-06-02 Sihan Tan , Taro Miyazaki , Kazuhiro Nakadai

Continuous Sign Language Recognition (CSLR) is a crucial task for understanding the languages of deaf communities. Contemporary keypoint-based approaches typically rely on spatio-temporal encoding, where spatial interactions among keypoints…

Computer Vision and Pattern Recognition · Computer Science 2026-03-18 Suvajit Patra , Soumitra Samanta

Sign language translation (SLT) addresses the problem of translating information from a sign language in video to a spoken language in text. Existing studies, while showing progress, are often limited to narrow domains and/or few sign…

Computation and Language · Computer Science 2024-07-17 Biao Zhang , Garrett Tanzer , Orhan Firat