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Weighted mode filtering and its applications to depth video enhancement and coding

Dongbo Min, Jiangbo Lu, Viet-Anh Nguyen, Minh N. Do
2012 2012 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)  
of the depth map.  ...  This paper presents a novel approach for improving the quality of depth video.  ...  [7], (c) Trilateral filter [8], (d) Proposed in-loop filter.  ... 
doi:10.1109/icassp.2012.6289150 dblp:conf/icassp/MinLND12 fatcat:2orxqbq6unbgxi25q5evei3p2q

A graph-based joint bilateral approach for depth enhancement

Yongzhe Wang, Antonio Ortega, Dong Tian, Anthony Vetro
2014 2014 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)  
In one scheme, the depth is first upsampled using a conventional method, then followed by a graph-based joint bilateral filtering to enhance edges and reduce noise.  ...  In one scheme, the depth is first upsampled using a conventional method, then followed by a graph-based joint bilateral filtering to enhance edges and reduce noise.  ...  A trilateral filter was proposed in [2] that extends JBF by making use of the pixel difference in depth map.  ... 
doi:10.1109/icassp.2014.6853724 dblp:conf/icassp/WangOTV14 fatcat:dwcwtn7llbhq7gshflka2nuqcq

Deep Convolutional Grid Warping Network for Joint Depth Map Upsampling

Yoonmo Yang, Dongsin Kim, Byung Tae Oh
2020 IEEE Access  
In this paper, we propose a novel approach to upsample depth maps by using geometric deformation instead of pixel value refinement, which is employed in a majority of existing methods.  ...  Depth maps play an important role in the representation of 3D information.  ...  Jung proposed an adaptive joint trilateral filter, wherein the color and depth maps are simultaneously restored according to the classification of the depth edge [15] .  ... 
doi:10.1109/access.2020.3015209 fatcat:s7minlrtuvcp7mqxu2sldetrgm

Fast and Effective Region-based Depth Map Upsampling with Application to Location Map-Free Reversible Data Hiding

Kuo-Liang Chung, Yu-Ling Tseng, Tzu-Hsien Chan, Ching-Sheng Wang
2020 Journal of Advances in Mathematics and Computer Science  
In this paper, we rst propose a fast and eective region-based depth map upsampling method, and then propose a joint upsampling and location map-free reversible data hiding method, simpled called the JUR  ...  The comprehensive experiments have been carried out to not only justify the execution-time and quality merits of the upsampled depth maps by our upsampling method relative to the state-of-the-art methods  ...  Related works for depth map upsampling Based on the spatial filter kernel idea [4] , Kopf et al. [5] presented a joint bilateral filtering method for upsampling depth maps. Later, Kim et al.  ... 
doi:10.9734/jamcs/2020/v35i430268 fatcat:czcghyo4ovepvgs4v3dui4hfhu

Overview of efficient high-quality state-of-the-art depth enhancement methods by thorough design space exploration

Luc Vosters, Chris Varekamp, Gerard de Haan
2015 Journal of Real-Time Image Processing  
Then, we benchmark all relevant state-of-the-art filter-based temporal post-processing methods on depth accuracy by conducting a parameter space search to find the optimum set of parameters for various  ...  High-quality 3D content generation requires high-quality depth maps.  ...  [25] propose an adaptive joint trilateral weighted median filter that exploits multiview depth images by extending the joint bilateral filter with a confidence weight.  ... 
doi:10.1007/s11554-015-0537-z fatcat:mfzdmkdwh5djtjr6r2ju2arueq

Depth Map Super-Resolution via Multilevel Recursive Guidance and Progressive Supervision

Bolan Yang, Xiaoting Fan, Zexun Zheng, Xiaohuan Liu, Kaiming Zhang, Jianjun Lei
2019 IEEE Access  
Finally, a residual fusion and construction strategy is designed to fuse all residual information and reconstruct the high-resolution depth map.  ...  However, compared with a color image, the performance of depth map super-resolution is still poor.  ...  In addition, the joint trilateral filters were also proposed, which considered the gradient information of depth map [4] and view synthesis quality [5] .  ... 
doi:10.1109/access.2019.2914065 fatcat:qkqjwm3wyfc6znzeqgfje3jtpa

A stereoscopic video conversion scheme based on spatio-temporal analysis of MPEG videos

Guo-Shiang Lin, Hsiang-Yun Huang, Wei-Chih Chen, Cheng-Ying Yeh, Kai-Che Liu, Wen-Nung Lie
2012 EURASIP Journal on Advances in Signal Processing  
The above-mentioned depth estimation is initially block-based, followed by a locally adaptive joint trilateral upsampling algorithm to reduce the computing load significantly.  ...  A recursive temporal filter is used to reduce the possible depth fluctuations (and also artifacts in the synthesized images) resulting from wrong depth estimations.  ...  We describe the post-processing in detail here Locally adaptive joint trilateral upsampling (LA-JTU) Notice that edge misalignment between color and depth images after depth upsampling may cause visual  ... 
doi:10.1186/1687-6180-2012-237 fatcat:orgtneulr5bzzl4bfk6x7qokry

Depth map artifacts reduction: a review

Mostafa Ibrahim, Qiong Liu, Rizwan Khan, Jingyu Yang, Ehsan Adeli, You Yang
2020 IET Image Processing  
Depth maps are crucial for many visual applications, where they represent the positioning information of the objects in a three-dimensional scene.  ...  Usually, depth maps can be acquired via various devices, including Time of Flight, Kinect or light field camera, in practical applications.  ...  Inspired by JBF, noise aware filter for depth upsampling (NAFDU) was proposed by Chen et al.  ... 
doi:10.1049/iet-ipr.2019.1622 fatcat:fe5szwvvprdspptvsviw2e4dym

Bilateral Filtering: Theory and Applications

Sylvain Paris, Pierre Kornprobst, JackTumblin Tumblin, Fredo Durand
2008 Foundations and Trends in Computer Graphics and Vision  
This text provides a graphical, intuitive introduction to bilateral filtering, a practical guide for efficient implementation and an overview of its numerous applications, as well as mathematical analysis  ...  The bilateral filter is a non-linear technique that can blur an image while respecting strong edges.  ...  Acknowledgments The work of Sylvain Paris at MIT and Frédo Durand was supported by a National Science Foundation CAREER award 0447561 "Transient Signal Processing for Realistic Imagery," an NSF Grant No  ... 
doi:10.1561/0600000020 fatcat:dishi7qoe5galmgbmlafsfcruy

A Brief Survey of Recent Edge-Preserving Smoothing Algorithms on Digital Images [article]

Chandrajit Pal, Amlan Chakrabarti, Ranjan Ghosh
2015 arXiv   pre-print
Examples are bilateral filter, anisotropic diffusion filter, guided filter, trilateral filter etc.  ...  Furthermore it provides a realistic notion for efficient implementation with a research scope for hardware realization for further acceleration.  ...  Acknowledgement We thank Avik Kotal, Asit Samanta and Rourab Paul for their encouragement and Dr.Kunal Narayan Choudhury for his advice.  ... 
arXiv:1503.07297v1 fatcat:aimwawy7ijgh5d7kganitefiq4

Guided Depth Map Super-Resolution using Recumbent Y Network

Tao Li, Xiucheng Dong, Hongwei Lin
2020 IEEE Access  
Low spatial resolution is a well-known problem for depth maps captured by low-cost consumer depth cameras.  ...  In this paper, we propose a recumbent Y network (RYNet) to integrate the depth information and intensity information for depth map SR.  ...  [27] present a joint trilateral filtering algorithm that exploits spatial distance, color difference, and local depth gradient for depth map SR.  ... 
doi:10.1109/access.2020.3007667 fatcat:2ncqv3rbxncwhesslnzyeylyva

Remote Sensing Image Defogging Networks Based on Dual Self-Attention Boost Residual Octave Convolution

Zhiqin Zhu, Yaqin Luo, Guanqiu Qi, Jun Meng, Yong Li, Neal Mazur
2021 Remote Sensing  
The strengthen-operate-subtract (SOS) boosted module is used to fuse the refined feature maps of each network layer with the upsampling feature maps from the corresponding decoding stage.  ...  The performance of traditional image defogging methods relies on the fog-related prior knowledge, but they cannot always accurately obtain the scene depth information used in the defogging process.  ...  Singh [18] proposed an image dehazing method that used fourth-order partial differential equations based trilateral filter (FPDETF) to enhance the rough estimation of the atmosphere.  ... 
doi:10.3390/rs13163104 fatcat:guvg7o6px5au7fa5sp5yb6bzpa

Joint Depth Map Upsampling via Prior Minimum Spanning Tree

Xiu Li, Zhixiong Yang, Lulu Xie
2016 Proceedings of the 1st International Conference on Information Technologies in Education and Learning   unpublished
In this paper, we propose a novel depth map upsampling algorithm based on prior minimum spanning tree (pMST).  ...  Utilizing the registered color and depth images, we construct a prior map which indicates the probability of the co-occurrence between depth discontinuities and color image edges.  ...  Extending traditional bilateral filter to the trilateral filter, Kai-Han Lo et al. [6] utilized the trilateral filter to upsample the depth images with the pre-aligned color images.  ... 
doi:10.2991/icitel-15.2016.12 fatcat:omdffysfu5e6xgsjwiuaccrzqm

Interactive Depth-Aware Effects for Stereo Image Editing

Joshua Abbott, Bryan Morse
2013 2013 International Conference on 3D Vision  
In particular, we present methods for highlighted depth-of-field, haze, depth-of-field, and image relighting.  ...  This thesis introduces methods for adding user-guided depth-aware effects to images captured with a consumer-grade stereo camera with minimal user interaction.  ...  To correct these we use a trilateral filter based on spatial proximity, color similarity, and disparity similarity.  ... 
doi:10.1109/3dv.2013.42 dblp:conf/3dim/AbbottM13 fatcat:lg425o3zqzdodoc57aoqrgz6h4

A gentle introduction to bilateral filtering and its applications

Sylvain Paris
2007 ACM SIGGRAPH 2007 courses on - SIGGRAPH '07  
Thanks to Paul Debevec and Jack Tumblin for allowing us to use their radiance maps. Thanks to the reviewers for their careful comments.  ...  Also thanks to Blaise Agüera y Arcas, Michael Herf, Klaus Schauser, Tobias Höllerer and Ian Gilman for their constructive critiques. To the talented Gretchen Elise for the use of her photo.  ...  Previous Exposures Frame FIFO n+2 Video In n+1 n n-1 n-2 Combine/Filter Video Out Exposure/Tone Map n-1 n-2 n-3 . The Trilateral Filter for High Contrast Images and Meshes.  ... 
doi:10.1145/1281500.1281604 dblp:conf/siggraph/Paris07 fatcat:7hiertzncbe6hptgvrtvwvd3xi
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