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Automatic portrait video matting is an under-constrained problem. Most state-of-the-art methods only exploit the semantic information and process each frame individually. Their performance is compromised due to the lack of temporal…

计算机视觉与模式识别 · 计算机科学 2021-09-14 Qiqi Hou , Charlie Wang

We propose DeRenderNet, a deep neural network to decompose the albedo and latent lighting, and render shape-(in)dependent shadings, given a single image of an outdoor urban scene, trained in a self-supervised manner. To achieve this goal,…

计算机视觉与模式识别 · 计算机科学 2021-04-29 Yongjie Zhu , Jiajun Tang , Si Li , Boxin Shi

The performance of deep networks for semantic image segmentation largely depends on the availability of large-scale training images which are labelled at the pixel level. Typically, such pixel-level image labellings are obtained manually by…

计算机视觉与模式识别 · 计算机科学 2020-07-21 Xiang Zhang , Wei Zhang , Jinye Peng , Jianping Fan

Semantic segmentation is one of the core tasks in the field of computer vision, and its goal is to accurately classify each pixel in an image. The traditional Unet model achieves efficient feature extraction and fusion through an…

计算机视觉与模式识别 · 计算机科学 2025-02-07 Xuan Li , Quanchao Lu , Yankaiqi Li , Muqing Li , Yijiashun Qi

Producing manual, pixel-accurate, image segmentation labels is tedious and time-consuming. This is often a rate-limiting factor when large amounts of labeled images are required, such as for training deep convolutional networks for…

计算机视觉与模式识别 · 计算机科学 2021-02-19 Luis C. Garcia-Peraza-Herrera , Lucas Fidon , Claudia D'Ettorre , Danail Stoyanov , Tom Vercauteren , Sebastien Ourselin

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…

计算机视觉与模式识别 · 计算机科学 2024-02-29 Jingfeng Yao , Xinggang Wang , Lang Ye , Wenyu Liu

Automatic image segmentation technology is critical to the visual analysis. The autoencoder architecture has satisfying performance in various image segmentation tasks. However, autoencoders based on convolutional neural networks (CNN) seem…

计算机视觉与模式识别 · 计算机科学 2022-08-22 Shiqiang Ma , Xuejian Li , Jijun Tang , Fei Guo

In this paper, we propose a novel method for the challenging problem of guided depth map super-resolution, called PAGNet. It is based on residual dense networks and involves the attention mechanism to suppress the texture copying problem…

计算机视觉与模式识别 · 计算机科学 2019-11-25 Arpit Bansal , Sankaraganesh Jonna , Rajiv R. Sahay

Image harmonization aims at adjusting the appearance of the foreground to make it more compatible with the background. Without exploring background illumination and its effects on the foreground elements, existing works are incapable of…

计算机视觉与模式识别 · 计算机科学 2023-09-19 Zhongyun Hu , Ntumba Elie Nsampi , Xue Wang , Qing Wang

Fine-grained image recognition is central to many multimedia tasks such as search, retrieval and captioning. Unfortunately, these tasks are still challenging since the appearance of samples of the same class can be more different than those…

Visual grounding focuses on establishing fine-grained alignment between vision and natural language, which has essential applications in multimodal reasoning systems. Existing methods use pre-trained query-agnostic visual backbones to…

计算机视觉与模式识别 · 计算机科学 2022-03-30 Jiabo Ye , Junfeng Tian , Ming Yan , Xiaoshan Yang , Xuwu Wang , Ji Zhang , Liang He , Xin Lin

Semantic image segmentation is an essential component of modern autonomous driving systems, as an accurate understanding of the surrounding scene is crucial to navigation and action planning. Current state-of-the-art approaches in semantic…

计算机视觉与模式识别 · 计算机科学 2016-12-07 Tobias Pohlen , Alexander Hermans , Markus Mathias , Bastian Leibe

Current methods aggregate multi-level features or introduce edge and skeleton to get more refined saliency maps. However, little attention is paid to how to obtain the complete salient object in cluttered background, where the targets are…

计算机视觉与模式识别 · 计算机科学 2023-01-19 Ge Zhu , Jinbao Li , Yahong Guo

Humans are very good at directing their visual attention toward relevant areas when they search for different types of objects. For instance, when we search for cars, we will look at the streets, not at the top of buildings. The motivation…

计算机视觉与模式识别 · 计算机科学 2020-06-12 Hughes Perreault , Guillaume-Alexandre Bilodeau , Nicolas Saunier , Maguelonne Héritier

With the popularization of high-end mobile devices, Ultra-high-definition (UHD) images have become ubiquitous in our lives. The restoration of UHD images is a highly challenging problem due to the exaggerated pixel count, which often leads…

计算机视觉与模式识别 · 计算机科学 2024-11-12 Chen Wu , Ling Wang , Long Peng , Dianjie Lu , Zhuoran Zheng

We propose an automatic preprocessing and ensemble learning for segmentation of cell images with low quality. It is difficult to capture cells with strong light. Therefore, the microscopic images of cells tend to have low image quality but…

图像与视频处理 · 电气工程与系统科学 2021-08-31 Sota Kato , Kazuhiro Hotta

In many advanced video based applications background modeling is a pre-processing step to eliminate redundant data, for instance in tracking or video surveillance applications. Over the past years background subtraction is usually based on…

计算机视觉与模式识别 · 计算机科学 2018-07-18 Maryam Sultana , Arif Mahmood , Sajid Javed , Soon Ki Jung

Real world images often have highly imbalanced content density. Some areas are very uniform, e.g., large patches of blue sky, while other areas are scattered with many small objects. Yet, the commonly used successive grid downsampling…

计算机视觉与模式识别 · 计算机科学 2023-10-27 Chen Ziwen , Kaushik Patnaik , Shuangfei Zhai , Alvin Wan , Zhile Ren , Alex Schwing , Alex Colburn , Li Fuxin

In this paper, we propose a foreground-aware dataset distillation method that enhances patch selection in a content-adaptive manner. With the rising computational cost of training large-scale deep models, dataset distillation has emerged as…

计算机视觉与模式识别 · 计算机科学 2026-01-07 Longzhen Li , Guang Li , Ren Togo , Keisuke Maeda , Takahiro Ogawa , Miki Haseyama

Image matting is an ill-posed problem that aims to estimate the opacity of foreground pixels in an image. However, most existing deep learning-based methods still suffer from the coarse-grained details. In general, these algorithms are…

计算机视觉与模式识别 · 计算机科学 2021-06-29 Yuhao Liu , Jiake Xie , Yu Qiao , Yong Tang and , Xin Yang