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Multiview depth coding based on combined color/depth segmentation
2012
Journal of Visual Communication and Image Representation
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In this paper a new coding method for multiview depth video is presented. Considering the smooth structure and sharp edges of depth maps, a segmentation based approach is proposed. ...
To reduce the cost associated with partition coding, an estimation of the depth partition is built using the decoded color view segmentation. ...
map is the same for all those virtual views. ...
doi:10.1016/j.jvcir.2011.08.001
fatcat:un2bh2nivfcdhcydo5ipsxe73y
Bypassing Depth Maps Transmission For Immersive Video Coding
2019
2019 Picture Coding Symposium (PCS)
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Instead, we estimate the depth information on the client-side from the transmitted views. The approach leads to an impressive rate saving (37.3% in average). ...
This paper addresses several downsides of the system under development in MPEG-I for coding and transmission of immersive media. ...
Depth Estimation The authors of [10] utilize deep learning methods to estimate depth maps for light-fields. ...
doi:10.1109/pcs48520.2019.8954543
dblp:conf/pcs/GarusJMG19
fatcat:7dj7lrzl2bac5izwnpz5liiwha
Joint processing and fast encoding algorithm for multi-view depth video
2016
EURASIP Journal on Image and Video Processing
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In addition, the depth video coding method in the current 3D-HEVC software implementation is highly complex. In this paper, we introduce a joint processing and fast coding algorithm for depth video. ...
The multi-view video plus depth format is the main representation of a three-dimensional (3D) scene. ...
Object edges in depth video are important for virtual view rendering, and pixel value variations in these regions also lead to virtual view distortions during the rendering process. ...
doi:10.1186/s13640-016-0128-3
fatcat:kzdrqdyq5rcgvkhke4egkurnou
On Dependent Bit Allocation for Multiview Image Coding With Depth-Image-Based Rendering
2011
IEEE Transactions on Image Processing
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Our goal is to determine how to best select captured views for encoding and distribute available bits among texture and depth maps of selected coded views, such that visual distortion of desired constructed ...
Experiments show that our proposed efficient selection of coded views and quantization levels for corresponding texture and depth maps outperforms an alternative scheme using constant quantization levels ...
In addition, we see that for fine quantization levels of depth maps in Fig. 2(a = U vi,vj (∆) * d s vi,vj ((v i + v j )/2). (9) As previously discussed, if distortions in left and right depth maps are ...
doi:10.1109/tip.2011.2158230
pmid:21632301
fatcat:yovdt6eig5gfxoijsdhfdfjdye
Reconstruction of coarse depth estimates using hierarchical image partitions
2012
Multidimensional systems and signal processing
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This paper presents a novel depth map enhancement method which takes as inputs a single view and an associated coarse depth estimate. ...
The depth estimate is reconstructed according to the region boundaries proposed within a set of image partitions of the associated view. ...
Conclusion This paper presents a novel depth map reconstruction method which takes as inputs a single view and a coarse depth estimate. ...
doi:10.1007/s11045-012-0191-6
fatcat:dtv3c6axr5fv5jlqkw2zx55hcy
Multiview video representations for quality-scalable navigation
2014
2014 IEEE Visual Communications and Image Processing Conference
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We propose a distortion model for the rendered virtual views and an algorithm that selects the optimal views' subset per layer. ...
Usually, in these systems texture and depth maps of captured views are available at the user side, as they permit the rendering of intermediate virtual views. ...
For each coded view v ∈ V, texture and depth maps are available, allowing the generation of intermediate virtual viewpoints. ...
doi:10.1109/vcip.2014.7051562
dblp:conf/vcip/AbreuTMTFP14
fatcat:qyraghuunjd5fekbpycarvghse
DisCO: Portrait Distortion Correction with Perspective-Aware 3D GANs
[article]
2023
arXiv
pre-print
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We propose a simple yet effective method for correcting perspective distortions in a single close-up face. ...
We first perform GAN inversion using a perspective-distorted input facial image by jointly optimizing the camera intrinsic/extrinsic parameters and face latent code. ...
Initially, we acquire the depth map d full near for the input image through a monocular depth estimator [38] . ...
arXiv:2302.12253v3
fatcat:zjocjfsywra65f4yzuad2poozq
Unsupervised Learning of Depth and Ego-Motion from Cylindrical Panoramic Video with Applications for Virtual Reality
[article]
2020
arXiv
pre-print
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Panoramic depth estimation is an important technology for applications such as virtual reality, 3D modeling, and autonomous robotic navigation. ...
Our evaluation of synthetic and real data shows that unsupervised learning of depth and ego-motion on cylindrical panoramic images can produce high-quality depth maps and that an increased field-of-view ...
Fences and other fine structures appear in the predicted depth maps but are not always perfectly estimated. ...
arXiv:2010.07704v1
fatcat:znyt36i2mzgixnnyeo2eknvmo4
A Synthesis-Quality-Oriented Depth Refinement Scheme for MPEG Free Viewpoint Television (FTV)
2009
2009 11th IEEE International Symposium on Multimedia
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and virtual camera locations. ...
An analytical model is first developed to approximate the per-pixel synthesis distortion (caused by depth-image compression) as a function of depth-error variances, intensity variations, ground-truth depth ...
For this reason, we adopt a candidate-based disparity estimation scheme to derive depth from the received view images. ...
doi:10.1109/ism.2009.68
dblp:conf/ism/ChenCYP09
fatcat:zw7kty2knrggvbxhtbt7aqbnha
Autofocus on Depth of Interest for 3D Image Coding
2017
Journal of Electrical and Computer Engineering
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This consistency avoids the distortion along objects contours in depth maps and those of texture images and synthesized views. ...
The method is based on a joint "Depth of Interest" (DoI) extraction and coding scheme. ...
It offers a fine extraction of objects with well-defined contours in the depth map, inducing a low distortion among area of interest in the synthesized views. ...
doi:10.1155/2017/9689715
fatcat:33yujp4bo5bo5j4i2oofgstlym
Scalable and Efficient Video Coding Using 3-D Modeling
2006
IEEE transactions on multimedia
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The method proves to be better than previous methods for video encoding of static scenes, even better than state-of-the-art video coders such as H264 (also known as MPEG AVC). ...
Another application of our approach is the fast transmission and real-time visualization of virtual environments obtained by video capture, for virtual or augmented reality, free walk-through in photo-realistic ...
In Galpin's method depth maps were encoded as an image with EBCOT. ...
doi:10.1109/tmm.2006.879873
fatcat:g56vxbppobdinfndnesbt2rbga
Image-based rendering of complex scenes from a multi-camera rig
2005
IEE Proceedings - Vision Image and Signal Processing
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The real camera viewpoints are calibrated from the image data and dense depth maps are estimated for each real view. ...
This contribution describes two methods to extrapolate novel views of complex scenes with occlusions and large depth discontinuities from images of a moving uncalibrated multi-camera rig. ...
The images for the dinosaur scene were supplied by Oliver Grau, BBC Research. ...
doi:10.1049/ip-vis:20045104
fatcat:h564xf4hsnc67el6wtopie7hwy
Methods for depth-map filtering in view-plus-depth 3D video representation
2012
EURASIP Journal on Advances in Signal Processing
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A number of post-filtering methods are studied, modified and compared for their applicability to the task of depth map restoration and post-filtering. ...
In this article, we study the problem of post-processing of depth maps degraded by improper estimation or by block-transformbased compression. ...
Having a depth map given explicitly along with color texture, a virtual view for a desired camera position can be synthesized using DIBR [2] . ...
doi:10.1186/1687-6180-2012-25
fatcat:skxdb3g3nzh43d72fo75eft7he
Delay-Cognizant Interactive Streaming of Multiview Video With Free Viewpoint Synthesis
2012
IEEE transactions on multimedia
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Given these improvements, we formalize a new join optimization of the frame coding structure, transmission schedule, and quantization parameters of the texture and depth maps of multiple camera views. ...
First, using depth-image-based rendering, the new IMVS system enables free viewpoint switching, i.e., by encoding and transmitting both texture and depth maps of captured views, a client can select and ...
We then describe the source model for coded multiview videos, and DIBR used for synthesizing virtual views using coded texture and depth maps of neighboring views. ...
doi:10.1109/tmm.2012.2191267
fatcat:t7xc723yzzgv5hheffoakrkifq
360 Layout Estimation via Orthogonal Planes Disentanglement and Multi-view Geometric Consistency Perception
[article]
2023
arXiv
pre-print
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Concretely, we introduce an optimization strategy for decision-level layout analysis and a 1D cost volume construction method for feature-level multi-view aggregation, both of which are designed to fully ...
For the second problem, we present an unsupervised adaptation technique tailored for horizon-depth and ratio representations. ...
ACKNOWLEDGMENTS We would like to thank Wei Wang, Shujun Huang, Yue Zhan, and Shuai Zheng for valuable discussions. Thanks to all authors for their insightful research and open source projects. ...
arXiv:2312.16268v1
fatcat:xgwiw5ustjag3pkuoulkc743hy
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