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Dense image captioning is critical for cross-modal alignment in vision-language pretraining and text-to-image generation, but scaling expert-quality annotations is prohibitively expensive. While synthetic captioning via strong…

Computer Vision and Pattern Recognition · Computer Science 2026-03-11 Tzu-Heng Huang , Sirajul Salekin , Javier Movellan , Frederic Sala , Manjot Bilkhu

We introduce the dense captioning task, which requires a computer vision system to both localize and describe salient regions in images in natural language. The dense captioning task generalizes object detection when the descriptions…

Computer Vision and Pattern Recognition · Computer Science 2015-11-25 Justin Johnson , Andrej Karpathy , Li Fei-Fei

The training of controllable text-to-video (T2V) models relies heavily on the alignment between videos and captions, yet little existing research connects video caption evaluation with T2V generation assessment. This paper introduces…

Artificial Intelligence · Computer Science 2025-05-20 Xinlong Chen , Yuanxing Zhang , Chongling Rao , Yushuo Guan , Jiaheng Liu , Fuzheng Zhang , Chengru Song , Qiang Liu , Di Zhang , Tieniu Tan

Visual captioning requires models to capture visual content faithfully while minimizing both omission and hallucination. As the dominant paradigm for captioning, MLLMs have achieved strong performance through scaling and high-quality data.…

Computer Vision and Pattern Recognition · Computer Science 2026-05-28 Xingyu Lu , Jinpeng Wang , Yi-Fan Zhang , Yankai Yang , Yancheng Long , Yiyang Fan , Xuanyu Zheng , Haonan Fan , Kaiyu Jiang , Tianke Zhang , Changyi Liu , Bin Wen , Fan Yang , Tingting Gao , Han Li , Chun Yuan

The image captioning task is typically realized by an auto-regressive method that decodes the text tokens one by one. We present a diffusion-based captioning model, dubbed the name DDCap, to allow more decoding flexibility. Unlike image…

Computer Vision and Pattern Recognition · Computer Science 2022-12-12 Zixin Zhu , Yixuan Wei , Jianfeng Wang , Zhe Gan , Zheng Zhang , Le Wang , Gang Hua , Lijuan Wang , Zicheng Liu , Han Hu

Given the accelerating progress of vision and language modeling, accurate evaluation of machine-generated image captions remains critical. In order to evaluate captions more closely to human preferences, metrics need to discriminate between…

Computer Vision and Pattern Recognition · Computer Science 2024-02-29 Koki Maeda , Shuhei Kurita , Taiki Miyanishi , Naoaki Okazaki

As Vision-Language Models (VLMs) are increasingly deployed in split-DNN configurations--with visual encoders (e.g., ResNet, ViT) operating on user devices and sending intermediate features to the cloud--there is a growing privacy risk from…

Computer Vision and Pattern Recognition · Computer Science 2025-10-28 Kedong Xiu , Sai Qian Zhang

It is encouraged to see that progress has been made to bridge videos and natural language. However, mainstream video captioning methods suffer from slow inference speed due to the sequential manner of autoregressive decoding, and prefer…

Computer Vision and Pattern Recognition · Computer Science 2021-03-25 Bang Yang , Yuexian Zou , Fenglin Liu , Can Zhang

Current image captioning works usually focus on generating descriptions in an autoregressive manner. However, there are limited works that focus on generating descriptions non-autoregressively, which brings more decoding diversity. Inspired…

Computer Vision and Pattern Recognition · Computer Science 2023-05-23 Yufeng He , Zefan Cai , Xu Gan , Baobao Chang

The task of Dense Video Captioning (DVC) aims to generate captions with timestamps for multiple events in one video. Semantic information plays an important role for both localization and description of DVC. We present a semantic-assisted…

Computer Vision and Pattern Recognition · Computer Science 2022-08-16 Yifan Lu , Ziqi Zhang , Yuxin Chen , Chunfeng Yuan , Bing Li , Weiming Hu

Video captioning, i.e. the task of generating captions from video sequences creates a bridge between the Natural Language Processing and Computer Vision domains of computer science. The task of generating a semantically accurate description…

Computer Vision and Pattern Recognition · Computer Science 2023-10-17 Md. Mushfiqur Rahman , Thasin Abedin , Khondokar S. S. Prottoy , Ayana Moshruba , Fazlul Hasan Siddiqui

Audio-visual captioning aims to generate holistic scene descriptions by jointly modeling sound and vision. While recent methods have improved performance through sophisticated modality fusion, it remains unclear to what extent the two…

Audio and Speech Processing · Electrical Eng. & Systems 2025-10-29 Yuchi Ishikawa , Toranosuke Manabe , Tatsuya Komatsu , Yoshimitsu Aoki

Video understanding, including video captioning and retrieval, is still a great challenge for video-language models (VLMs). The existing video retrieval and caption benchmarks only include short descriptions, limits their ability of…

Computer Vision and Pattern Recognition · Computer Science 2025-03-19 Yifan Xu , Xinhao Li , Yichun Yang , Desen Meng , Rui Huang , Limin Wang

Dense video captioning aims to localize and describe important events in untrimmed videos. Existing methods mainly tackle this task by exploiting only visual features, while completely neglecting the audio track. Only a few prior works have…

Computer Vision and Pattern Recognition · Computer Science 2020-08-12 Vladimir Iashin , Esa Rahtu

Caption quality has emerged as a critical bottleneck in training high-quality text-to-image (T2I) and text-to-video (T2V) generative models. While visual language models (VLMs) are commonly deployed to generate captions from visual data,…

Computer Vision and Pattern Recognition · Computer Science 2026-03-10 Varun Ananth , Baqiao Liu , Haoran Cai

Most video captioning models are designed to process short video clips of few seconds and output text describing low-level visual concepts (e.g., objects, scenes, atomic actions). However, most real-world videos last for minutes or hours…

Computer Vision and Pattern Recognition · Computer Science 2024-05-20 Md Mohaiminul Islam , Ngan Ho , Xitong Yang , Tushar Nagarajan , Lorenzo Torresani , Gedas Bertasius

In learning vision-language representations from web-scale data, the contrastive language-image pre-training (CLIP) mechanism has demonstrated a remarkable performance in many vision tasks. However, its application to the widely studied…

Computer Vision and Pattern Recognition · Computer Science 2024-07-09 Fengchuang Xing , Mingjie Li , Yuan-Gen Wang , Guopu Zhu , Xiaochun Cao

Understanding real-world videos such as movies requires integrating visual and dialogue cues. Yet existing VideoQA benchmarks struggle to capture this multimodal reasoning and, given the difficulty of evaluating free-form answers, largely…

Computer Vision and Pattern Recognition · Computer Science 2026-04-01 Shaden Shaar , Bradon Thymes , Sirawut Chaixanien , Claire Cardie , Bharath Hariharan

The prevalence of user-generated content (UGC) on platforms such as YouTube and TikTok has rendered no-reference (NR) perceptual video quality assessment (VQA) vital for optimizing video delivery. Nonetheless, the characteristics of…

Image and Video Processing · Electrical Eng. & Systems 2025-11-11 Xinyi Wang , Angeliki Katsenou , Junxiao Shen , David Bull

Video Language Models (VideoLMs) enable AI systems to understand temporal dynamics in videos. To fit within the maximum context window constraint, current methods use keyframe sampling which often misses both macro-level events and…

Computer Vision and Pattern Recognition · Computer Science 2026-03-31 Sayan Deb Sarkar , Rémi Pautrat , Ondrej Miksik , Marc Pollefeys , Iro Armeni , Mahdi Rad , Mihai Dusmanu