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Lighting transfer across multiple views through local color transforms

Qian Zhang, Pierre-Yves Laffont, Terence Sim
2017 Computational Visual Media  
viewpoint and time-of-day. ) Learn local color transforms from sparse correspondences (c) Propagate transforms and relight source image (a) Obtain sparse correspondences through mul -view stereo Fig  ...  The transforms are learned from sparse geometric correspondences, which we obtain from the photo collection through multi-view stereo.  ... 
doi:10.1007/s41095-017-0085-5 fatcat:5ugxo2yiczc3jm34fr6qr4vdfi

Lighting transfer across multiple views through local color transforms

Qian Zhang, Pierre-Yves Laffont, Terence Sim
2016 SIGGRAPH ASIA 2016 Technical Briefs on - SA '16  
We cast lighting transfer as a colorization problem, where the transfer of local illumination across images is guided by sparse correspondences obtained through multi-view stereo.  ...  Abstract We present a method for transferring lighting across photographs of a static scene.  ...  We cast lighting transfer as a colorization problem, where the transfer of local illumination across images is guided by sparse correspondences obtained through multi-view stereo.  ... 
doi:10.1145/3005358.3005360 fatcat:wd4uifvdrfdlplsrwfvbbi3bay

Person Re-identification: System Design and Evaluation Overview [chapter]

Xiaogang Wang, Rui Zhao
2014 Person Re-Identification  
It is particularly challenging because observed pedestrians undergo significant variations across camera views, and there are a large number of pedestrians to be distinguished given small pedestrian images  ...  Person re-identification is to match pedestrian images observed in different camera views with visual features.  ...  Same pedestrians may undergo significant photometric and geometric transforms across camera views. Such transforms can be estimated through a learning process.  ... 
doi:10.1007/978-1-4471-6296-4_17 dblp:series/acvpr/WangZ14 fatcat:6b6uon4g6ncf3amubxlwh3ouxu

Targets Association across Multiple Cameras by Learning Transfer Models

Liu Suolan, Wang Jia, Sun Changyin
2016 International Journal of Signal Processing, Image Processing and Pattern Recognition  
By this way, the overall and local information can be used, which has advantage to color transform correction.  ...  In this paper, we propose a novel method to solve the problem of targets association and tracking across multiple cameras of non-overlapping views. The method is divided into two parts.  ...  Now, we need to transfer it from lαβ color space to RGB color space, thus result image based on overall and local color transform correction is gained, which is named as transferred image. , where    ... 
doi:10.14257/ijsip.2016.9.1.17 fatcat:yxq6nnv3ergy3gzqrr443gp65q

Exploiting Multiple Detections for Person Re-Identification

Amran Bhuiyan, Alessandro Perina, Vittorio Murino
2018 Journal of Imaging  
Re-identification systems aim at recognizing the same individuals in multiple cameras, and one of the most relevant problems is that the appearance of same individual varies across cameras due to illumination  ...  Different from recently proposed methods which only consider pairs of images to learn a brightness transfer function, we exploit such a multiple-frame-based learning approach that leverages consecutive  ...  Each color indexes a particular stel s i while maintaining consistent the segmentation (same color, same part of the body) across the whole dataset.  ... 
doi:10.3390/jimaging4020028 fatcat:vgggbna255fgrlacmoze3c6q2a

Object matching in disjoint cameras using a color transfer approach

Kideog Jeong, Christopher Jaynes
2007 Machine Vision and Applications  
In this work we treat this appearance model distortion between two non-overlapping cameras as one in which some unknown color transfer function warps a known appearance model from one view to another.  ...  We demonstrate the method in the context of a video surveillance network and show that recognition of subjects in disjoint views can be significantly improved using the new color transfer approach.  ...  [29] have proposed a brightness transfer function that is acquired across multiple non-overlapping views, and run detailed experiments in three different multi-camera scenarios.  ... 
doi:10.1007/s00138-007-0079-x fatcat:je4wamkgz5af5akrhojdfv6wcu

Optimal Textures: Fast and Robust Texture Synthesis and Style Transfer through Optimal Transport [article]

Eric Risser
2020 arXiv   pre-print
This paper presents a light-weight, high-quality texture synthesis algorithm that easily generalizes to other applications such as style transfer and texture mixing.  ...  marginal distributions across each dimension.  ...  In addition, we combine the strengths of both direct color transfer and luminance based style transfer. Direct color transfer is a global operation that does not preserve the local colors.  ... 
arXiv:2010.14702v1 fatcat:2xpdogs4jrgcdouvvajcl5kxkm

Consistent Video Filtering for Camera Arrays

Nicolas Bonneel, James Tompkin, Deqing Sun, Oliver Wang, Kalyan Sunkavalli, Sylvain Paris, Hanspeter Pfister
2017 Computer graphics forum (Print)  
Figure 1: Our method turns inconsistent filtered video from camera arrays into consistent video across time and view.  ...  Abstract Visual formats have advanced beyond single-view images and videos: 3D movies are commonplace, researchers have developed multi-view navigation systems, and VR is helping to push light field cameras  ...  [BBPP10] , the (New) Stanford Light Field Archive, Nagoya University Multi-view Sequence Download List, Al Caudullo Productions, and G. Pouillot for their videos.  ... 
doi:10.1111/cgf.13135 fatcat:x7q7s27mdzhnzeefct5w3ddqjy

Intelligent multi-camera video surveillance: A review

Xiaogang Wang
2013 Pattern Recognition Letters  
By removing the lightness component in the HSV color space, the color variation across camera views can be greatly reduced. The Log-RGB color space is less sensitive to photometric transformations.  ...  Since illumination remains constant in local regions, the ratios of neighboring colors can effectively remove the lighting component.  ... 
doi:10.1016/j.patrec.2012.07.005 fatcat:vnbxmu55x5ditdmhjvsmloezr4

Extended field of view soft x-ray Fourier transform holography: toward imaging ultrafast evolution in a single shot

William F. Schlotter, Jan Lüning, Ramon Rick, Kang Chen, Andreas Scherz, Stefan Eisebitt, Christian M. Günther, Wolfgang Eberhardt, Olav Hellwig, Joachim Stöhr
2007 Optics Letters  
Multiple object and reference waves extend the effective field of view for lensless imaging without compromising the spatial resolution.  ...  Panoramic full-field imaging is demonstrated by applying spatial multiplexing to Fourier transform holography.  ...  (b) The soft x-ray Fourier transform hologram shown was recorded with a momentum transfer range of q = ± 0.09 nm −1 .  ... 
doi:10.1364/ol.32.003110 pmid:17975613 fatcat:zix5b2sqdnccrjqpbm3chmx7o4

Numerical simulation of phase-space flows in the Collisionless Terrella experiment

D.A. Maslovsky, M. Manuel, B. Levitt
2002 IEEE Transactions on Plasma Science  
Selecting equal-density points across all energies generates the color surfaces.  ...  Color intensity plots are generated with Transform 3.4 after some smoothing and coordinate transformation are done with NoeSys 1.3.  ... 
doi:10.1109/tps.2002.1003897 fatcat:xhskqa7geraana5eyekenonsim

Object Tracking in Multiple Cameras with Disjoint Views [chapter]

Pier Luigi, Paolo Spagnolo
2011 Object Tracking  
The Brightness transfer function space Let R i (p, t) be the scene reflectance at a world point p(x, y, z) of an object that is lighted by white light, when it is viewed from camera C i at time instant  ...  Object color similarity estimation across camera using BTF It is natural that the observed color of an object can vary widely across multiple non-overlapping camera due to change in scene illumination  ... 
doi:10.5772/14220 fatcat:hnz4cpyb4fbrnmbvdans3ku3ya

Calibration of a multi-projector system for display on a cylindrical surface

Brandon B. May, Nathan D. Cahill, Mitchell R. Rosen
2010 2010 Western New York Image Processing Workshop  
ACKNOWLEDGEMENT The authors would like to acknowledge the National Science Foundation for supporting this research through NSF project 0909588. See  ...  They demonstrate color seamlessness across multiple projectors for both planar and curved displays.  ...  Once the image is transformed back to projector digital counts via the inverse transfer functions, it is ready to be displayed. A.  ... 
doi:10.1109/wnyipw.2010.5649778 fatcat:c3fwbamjybbkzh4dtrmbfyexru

A Survey of Color Mapping and its Applications [article]

H. S. Faridul, T. Pouli, C. Chamaret, J. Stauder, A. Tremeau, E. Reinhard
2014 Eurographics State of the Art Reports  
Color mapping or color transfer methods aim to recolor a given image or video by deriving a mapping between that image and another image serving as a reference.  ...  Methods for recoloring images have often appeared under the labels of color correction, color transfer or color balancing, to name a few, but their goal is always the same: mapping the colors of one image  ...  Color characterization involves models describing how light is transformed into the cameras' RGB signal.  ... 
doi:10.2312/egst.20141035 fatcat:fb36wq4zmzhfvmiapw3jfguoci

Hough Transform Run Length Encoding for Real-Time Image Processing

Christopher H. Messom, Gourab Sen Gupta, Serge N. Demidenko
2007 IEEE Transactions on Instrumentation and Measurement  
A RLE Hough transform is also presented for recognition of landmarks in the image to aid robot localization.  ...  Environments with gradual variations in color across the object will require additional approaches such as modeling objects with multiple colors to apply this technique successfully.  ...  The key objective of the vision system is to identify the objects in view given changing viewing angles and lighting conditions.  ... 
doi:10.1109/tim.2006.887687 fatcat:qaxqas72yrgwrep2gjohqjvnim
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