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Real-world image matting is essential for applications in content creation and augmented reality. However, it remains challenging due to the complex nature of scenes and the scarcity of high-quality datasets. To address these limitations,…

Computer Vision and Pattern Recognition · Computer Science 2025-02-25 Rui Liu

Annotating a large-scale image dataset is very tedious, yet necessary for training person re-identification models. To alleviate such a problem, we present an active hard sample mining framework via training an effective re-ID model with…

Computer Vision and Pattern Recognition · Computer Science 2020-04-15 Xin Xu , Lei Liu , Weifeng Liu , Meng Wang , Ruimin Hu

Image matting aims to predict alpha values of elaborate uncertainty areas of natural images, like hairs, smoke, and spider web. However, existing methods perform poorly when faced with highly transparent foreground objects due to the large…

Computer Vision and Pattern Recognition · Computer Science 2023-03-14 Huanqia Cai , Fanglei Xue , Lele Xu , Lili Guo

Annotated images are required for both supervised model training and evaluation in image classification. Manually annotating images is arduous and expensive, especially for multi-labeled images. A recent trend for conducting such laboursome…

Computer Vision and Pattern Recognition · Computer Science 2022-12-07 Jianzhe Lin , Tianze Yu , Z. Jane Wang

Mask-guided matting networks have achieved significant improvements and have shown great potential in practical applications in recent years. However, simply learning matting representation from synthetic and lack-of-real-world-diversity…

Computer Vision and Pattern Recognition · Computer Science 2024-03-29 Weihao Jiang , Zhaozhi Xie , Yuxiang Lu , Longjie Qi , Jingyong Cai , Hiroyuki Uchiyama , Bin Chen , Yue Ding , Hongtao Lu

High-quality data is necessary for modern machine learning. However, the acquisition of such data is difficult due to noisy and ambiguous annotations of humans. The aggregation of such annotations to determine the label of an image leads to…

Computer Vision and Pattern Recognition · Computer Science 2022-11-07 Lars Schmarje , Vasco Grossmann , Claudius Zelenka , Sabine Dippel , Rainer Kiko , Mariusz Oszust , Matti Pastell , Jenny Stracke , Anna Valros , Nina Volkmann , Reinhard Koch

Human annotation is always considered as ground truth in video object tracking tasks. It is used in both training and evaluation purposes. Thus, ensuring its high quality is an important task for the success of trackers and evaluations…

Computer Vision and Pattern Recognition · Computer Science 2019-11-11 Yu Pang , Xinyi Li , Lin Yuan , Haibin Ling

This paper aims to reduce the time to annotate images for panoptic segmentation, which requires annotating segmentation masks and class labels for all object instances and stuff regions. We formulate our approach as a collaborative process…

Computer Vision and Pattern Recognition · Computer Science 2020-12-16 Jasper R. R. Uijlings , Mykhaylo Andriluka , Vittorio Ferrari

Recent image matting studies are developing towards proposing trimap-free or interactive methods for complete complex image matting tasks. Although avoiding the extensive labors of trimap annotation, existing methods still suffer from two…

Computer Vision and Pattern Recognition · Computer Science 2023-12-08 Dinghao Yang , Bin Wang , Weijia Li , Yiqi Lin , Conghui He

This work offers a novel view on the use of human input as labels, acknowledging that humans may err. We build a behavioral profile for human annotators which is used as a feature representation of the provided input. We show that by…

Databases · Computer Science 2022-05-09 Roee Shraga

Present-day deep neural networks for video semantic segmentation require a large number of fine-grained pixel-level annotations to achieve the best possible results. Obtaining such annotations, however, is very expensive. On the other hand,…

Computer Vision and Pattern Recognition · Computer Science 2026-03-31 Samik Some , Vinay P. Namboodiri

Neural networks need big annotated datasets for training. However, manual annotation can be too expensive or even unfeasible for certain tasks, like multi-person 2D pose estimation with severe occlusions. A remedy for this is synthetic data…

Computer Vision and Pattern Recognition · Computer Science 2019-08-05 David T. Hoffmann , Dimitrios Tzionas , Micheal J. Black , Siyu Tang

Annotated data plays a critical role in Natural Language Processing (NLP) in training models and evaluating their performance. Given recent developments in Large Language Models (LLMs), models such as ChatGPT demonstrate zero-shot…

Computation and Language · Computer Science 2024-03-18 Minzhi Li , Taiwei Shi , Caleb Ziems , Min-Yen Kan , Nancy F. Chen , Zhengyuan Liu , Diyi Yang

When human annotators are given a choice about what to label in an image, they apply their own subjective judgments on what to ignore and what to mention. We refer to these noisy "human-centric" annotations as exhibiting human reporting…

Computer Vision and Pattern Recognition · Computer Science 2016-04-13 Ishan Misra , C. Lawrence Zitnick , Margaret Mitchell , Ross Girshick

Per-pixel masks of semantic objects are very useful in many applications, which, however, are tedious to be annotated. In this paper, we propose a human-agent collaborative annotation approach that can efficiently generate per-pixel masks…

Computer Vision and Pattern Recognition · Computer Science 2018-06-28 Lishi Zhang , Chenghan Fu , Jia Li

Face anti-spoofing plays a critical role in safeguarding facial recognition systems against presentation attacks. While existing deep learning methods show promising results, they still suffer from the lack of fine-grained annotations,…

Computer Vision and Pattern Recognition · Computer Science 2023-10-13 Xu Chen , Yunde Jia , Yuwei Wu

We present an automated technique for computing a map between two genus-zero shapes, which matches semantically corresponding regions to one another. Lack of annotated data prohibits direct inference of 3D semantic priors; instead, current…

Computer Vision and Pattern Recognition · Computer Science 2024-03-11 Luca Morreale , Noam Aigerman , Vladimir G. Kim , Niloy J. Mitra

The performance of supervised deep learning algorithms depends significantly on the scale, quality and diversity of the data used for their training. Collecting and manually annotating large amount of data can be both time-consuming and…

Computer Vision and Pattern Recognition · Computer Science 2021-07-02 C. Symeonidis , P. Nousi , P. Tosidis , K. Tsampazis , N. Passalis , A. Tefas , N. Nikolaidis

Over the last few years, deep learning based approaches have achieved outstanding improvements in natural image matting. Many of these methods can generate visually plausible alpha estimations, but typically yield blurry structures or…

Computer Vision and Pattern Recognition · Computer Science 2020-01-14 Yaoyi Li , Hongtao Lu

Natural image matting algorithms aim to predict the transparency map (alpha-matte) with the trimap guidance. However, the production of trimap often requires significant labor, which limits the widespread application of matting algorithms…

Computer Vision and Pattern Recognition · Computer Science 2024-02-29 Jingfeng Yao , Xinggang Wang , Lang Ye , Wenyu Liu