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Depth from focus (DFF) is one of the classical ill-posed inverse problems in computer vision. Most approaches recover the depth at each pixel based on the focal setting which exhibits maximal sharpness. Yet, it is not obvious how to…

计算机视觉与模式识别 · 计算机科学 2018-10-30 Caner Hazirbas , Sebastian Georg Soyer , Maximilian Christian Staab , Laura Leal-Taixé , Daniel Cremers

We propose a learning-based depth from focus/defocus (DFF), which takes a focal stack as input for estimating scene depth. Defocus blur is a useful cue for depth estimation. However, the size of the blur depends on not only scene depth but…

计算机视觉与模式识别 · 计算机科学 2022-03-01 Yuki Fujimura , Masaaki Iiyama , Takuya Funatomi , Yasuhiro Mukaigawa

Depth-from-Focus (DFF) enables precise depth estimation by analyzing focus cues across a stack of images captured at varying focal lengths. While recent learning-based approaches have advanced this field, they often struggle in complex…

计算机视觉与模式识别 · 计算机科学 2025-09-29 Sungmin Woo , Sangyoun Lee

For better photography, most recent commercial cameras including smartphones have either adopted large-aperture lens to collect more light or used a burst mode to take multiple images within short times. These interesting features lead us…

计算机视觉与模式识别 · 计算机科学 2022-10-03 Changyeon Won , Hae-Gon Jeon

Shape-from-Focus (SFF) is a passive depth estimation technique that infers scene depth by analyzing focus variations in a focal stack. Most recent deep learning-based SFF methods typically operate in two stages: first, they extract focus…

计算机视觉与模式识别 · 计算机科学 2026-04-03 Khurram Ashfaq , Muhammad Tariq Mahmood

Depth from Focus estimates depth by determining the moment of maximum focus from multiple shots at different focal distances, i.e. the Focal Stack. However, the limited sampling rate of conventional optical cameras makes it difficult to…

计算机视觉与模式识别 · 计算机科学 2024-05-14 Chenxu Jiang , Mingyuan Lin , Chi Zhang , Zhenghai Wang , Lei Yu

Shape from Focus (SFF) is a depth reconstruction technique that estimates scene structure from focus variations observed across a focal stack, that is, a sequence of images captured at different focus settings. A key limitation of SFF…

计算机视觉与模式识别 · 计算机科学 2026-04-03 Khurram Ashfaq , Muhammad Tariq Mahmood

Depth-from-defocus (DFD), modeling the relationship between depth and defocus pattern in images, has demonstrated promising performance in depth estimation. Recently, several self-supervised works try to overcome the difficulties in…

图像与视频处理 · 电气工程与系统科学 2023-03-28 Haozhe Si , Bin Zhao , Dong Wang , Yunpeng Gao , Mulin Chen , Zhigang Wang , Xuelong Li

Defocus blur detection (DBD) separates in-focus and out-of-focus regions in an image. Previous approaches mistakenly mistook homogeneous areas in focus for defocus blur regions, likely due to not considering the internal factors that cause…

计算机视觉与模式识别 · 计算机科学 2023-06-21 Yuxin Jin , Ming Qian , Jincheng Xiong , Nan Xue , Gui-Song Xia

Depth estimation is of critical interest for scene understanding and accurate 3D reconstruction. Most recent approaches in depth estimation with deep learning exploit geometrical structures of standard sharp images to predict corresponding…

计算机视觉与模式识别 · 计算机科学 2018-09-07 Marcela Carvalho , Bertrand Le Saux , Pauline Trouvé-Peloux , Andrés Almansa , Frédéric Champagnat

We estimate scene depth from a single defocus-blurred image using the dark channel as a complementary cue, leveraging its ability to capture local statistics and scene structure. Traditional depth-from-defocus (DFD) methods use multiple…

计算机视觉与模式识别 · 计算机科学 2025-06-26 Moushumi Medhi , Rajiv Ranjan Sahay

We propose Deep Feature Factorization (DFF), a method capable of localizing similar semantic concepts within an image or a set of images. We use DFF to gain insight into a deep convolutional neural network's learned features, where we…

机器学习 · 计算机科学 2018-10-09 Edo Collins , Radhakrishna Achanta , Sabine Süsstrunk

Depth estimation is a long-lasting yet important task in computer vision. Most of the previous works try to estimate depth from input images and assume images are all-in-focus (AiF), which is less common in real-world applications. On the…

计算机视觉与模式识别 · 计算机科学 2021-08-25 Ning-Hsu Wang , Ren Wang , Yu-Lun Liu , Yu-Hao Huang , Yu-Lin Chang , Chia-Ping Chen , Kevin Jou

In this paper, we introduce a novel network, called discriminative feature network (DFNet), to address the unsupervised video object segmentation task. To capture the inherent correlation among video frames, we learn discriminative features…

计算机视觉与模式识别 · 计算机科学 2020-08-05 Mingmin Zhen , Shiwei Li , Lei Zhou , Jiaxiang Shang , Haoan Feng , Tian Fang , Long Quan

The Normalizing Flow (NF) models a general probability density by estimating an invertible transformation applied on samples drawn from a known distribution. We introduce a new type of NF, called Deep Diffeomorphic Normalizing Flow (DDNF).…

机器学习 · 统计学 2018-11-26 Hadi Salman , Payman Yadollahpour , Tom Fletcher , Kayhan Batmanghelich

Fault detection for Deep Neural Networks (DNNs) has received increasing attention in recent years. While more advanced hybrid approaches have been proposed to combine multiple sources of information and outperform earlier techniques, they…

机器学习 · 计算机科学 2026-05-26 Amin Abbasishahkoo , Mahboubeh Dadkhah , Lionel Briand

Predicting novel views of a scene from real-world images has always been a challenging task. In this work, we propose a deep convolutional neural network (CNN) which learns to predict novel views of a scene from given collection of images.…

计算机视觉与模式识别 · 计算机科学 2021-07-15 Amit More , Subhasis Chaudhuri

This paper proposes an innovative object detector by leveraging deep features learned in high-level layers. Compared with features produced in earlier layers, the deep features are better at expressing semantic and contextual information.…

计算机视觉与模式识别 · 计算机科学 2019-12-11 Wenchi Ma , Yuanwei Wu , Feng Cen , Guanghui Wang

This paper addresses semantic image segmentation by incorporating rich information into Markov Random Field (MRF), including high-order relations and mixture of label contexts. Unlike previous works that optimized MRFs using iterative…

计算机视觉与模式识别 · 计算机科学 2015-09-25 Ziwei Liu , Xiaoxiao Li , Ping Luo , Chen Change Loy , Xiaoou Tang

Improving the generalization ability of Deep Neural Networks (DNNs) is critical for their practical uses, which has been a longstanding challenge. Some theoretical studies have uncovered that DNNs have preferences for some frequency…

计算机视觉与模式识别 · 计算机科学 2023-03-28 Shiqi Lin , Zhizheng Zhang , Zhipeng Huang , Yan Lu , Cuiling Lan , Peng Chu , Quanzeng You , Jiang Wang , Zicheng Liu , Amey Parulkar , Viraj Navkal , Zhibo Chen
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