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Hierarchical Vectorization for Portrait Images [article]

Qian Fu, Linlin Liu, Fei Hou, Ying He
2022 arXiv   pre-print
Aiming at developing intuitive and easy-to-use portrait editing tools, we propose a novel vectorization method that can automatically convert raster images into a 3-tier hierarchical representation.  ...  We evaluate our method on the FFHQR dataset and show that our method is effective for common portrait editing tasks, such as retouching, light editing, color transfer and expression editing.  ...  The works that are most relevant to ours are lighting transfer using optimal mass transport [30] and deep neural networks [38, 41] , vectorization guided color transfer [14] , style transfer through  ... 
arXiv:2205.11880v1 fatcat:tlcoj6sa45haljotxvcm5wakm4

Negative effective mass mechanism of negative differential drift velocity and terahertz generation

Z.S. Gribnikov, R.R. Bashirov, V.V. Mitin
2001 IEEE Journal of Selected Topics in Quantum Electronics  
This structure is intended to obtain electron dispersion relations with NEM sections in the useful energy range of 0.1-0.25 eV.  ...  Index Terms-Ballistic transport, negative differential drift velocity, quantum-well device, semiconductor superlattice, terahertz oscillator.  ...  Note that such behavior would be uncharacteristic for the RWN mechanism, but it is typical for the NEM mechanism, where a drift transfer from the light mass state to the heavy mass state takes place (that  ... 
doi:10.1109/2944.974235 fatcat:xzgt7nx3tzevhiljsndz7imevu

Impact of truck art, as popular culture on Pakistani society

Samina Zia Sheikh
2018 International Journal of Multidisciplinary and Current Research  
Several theories directly deal with popular culture rather mass media, though; they both are closely knitted now.  ...  It also covers the styles and materials used in ornamentation and philosophy that is adopted in various patent schemes and objects.  ...  Back light is used to prevent from accidents and side lights show the length of vehicle. Some lights are used as means of communication with other drivers. (Plate.1) adornment.  ... 
doi:10.14741/ijmcr/v.6.5.10 fatcat:h5kbcg2mf5dzrlspcsxk2gkxpu

Joint Learning of Portrait Intrinsic Decomposition and Relighting [article]

Mona Zehni, Shaona Ghosh, Krishna Sridhar, Sethu Raman
2021 arXiv   pre-print
Our approach is applicable to multi-lit datasets. We apply our training approach in two settings: 1) train on a mixture of synthetic and real data, 2) train on real datasets with limited supervision.  ...  Inverse rendering is the problem of decomposing an image into its intrinsic components, i.e. albedo, normal and lighting.  ...  Furthermore, the task of light transfer from a source to a target image has been addressed as a mass transport problem in [40] .  ... 
arXiv:2106.15305v1 fatcat:27ezbp2lbrgb7b6i5iwrr54wua

Learning Illumination from Diverse Portraits [article]

Chloe LeGendre, Wan-Chun Ma, Rohit Pandey, Sean Fanello, Christoph Rhemann, Jason Dourgarian, Jay Busch, Paul Debevec
2020 arXiv   pre-print
We generate a rich set of such photos by using a light stage to record the reflectance field and alpha matte of 70 diverse subjects in various expressions.  ...  We train our model using portrait photos paired with their ground truth environmental illumination.  ...  Recent works solved this problem either with a mass transport (Shu et al. 2017a) , we generate photo-realistic, synthetic training data using a set of re ectance basis images captured in an omnidirectional  ... 
arXiv:2008.02396v1 fatcat:iiv2vqxxuff7jj35vknqwh43ly

Learning Physics-guided Face Relighting under Directional Light [article]

Thomas Nestmeyer, Jean-François Lalonde, Iain Matthews, Andreas M. Lehrmann
2020 arXiv   pre-print
Relighting is an essential step in realistically transferring objects from a captured image into another environment.  ...  To train and evaluate our model, we collected a portrait database of 21 subjects with various expressions and poses.  ...  The mass transport relighting [42] approach is different in that it defines the target lighting as that of another portrait.  ... 
arXiv:1906.03355v2 fatcat:difsewz43vejfbxuod2okdngta

Photography as a visual note for printmaking

Niura Legramante Ribeiro
2018 PORTO ARTE Revista de Artes Visuais  
The photograph as a record of a light snapshot, spatial landscape structures, body memories, among others is found in the works of artists such as Alex Flemming, Claudio Mubarac, Lurdi Blauth, Marco Buti  ...  Radiographs of the artist's feet in black silhouettes and transferred to prints also remind us of a photogram.  ...  These are family portraits or images of objects. The photographs used are appropriated because she rarely takes one to be used as a source for her prints.  ... 
doi:10.22456/2179-8001.80783 fatcat:inreaubi3zbd3nstxhrgft7vcu

High-contrast computational caustic design

Yuliy Schwartzburg, Romain Testuz, Andrea Tagliasacchi, Mark Pauly
2014 ACM Transactions on Graphics  
We introduce an optimal transport formulation to establish a correspondence between the input geometry and the unknown target shape.  ...  Our algorithm solves for the shape of a transparent object such that the refracted light paints a desired caustic image on a receiver screen.  ...  They showed that certain far-field reflectors can be modeled by a 2nd order nonlinear elliptic PDE of Monge-Ampere type, which can be solved in variational form using Monge-Kantorovich mass transfer.  ... 
doi:10.1145/2601097.2601200 fatcat:jde3dmbolbdrfjiyvmsejpcpkq

Soft Matter Emerging Investigators Issue 2021 - Apparent phototaxis enabled by Brownian Motion

Lukas Niese, Linlin Wang, Sayan Das, Juliane Simmchen
2020 Soft Matter  
Acknowledgements The authors thank MN Popescu for constructive discussions and help with the phase portraits.  ...  A precise analysis of the trajectories was done using the software ''fiesta''. 36 ase portraits To obtain phase portraits, first we need a knowledge of the particle velocity U and X.  ...  The resulting solution was transferred to a Teflon autoclave, sealed and heated up to 150 1C for 12 h.  ... 
doi:10.1039/d0sm01603a pmid:33112347 fatcat:bjknsnu6bzhoxgmyrnocbru3za

Exploration of dual solutions for an enhanced cross liquid flow past a moving wedge under the significant impacts of activation energy and chemical reaction

Umair Khan, A. Zaib, Dumitru Baleanu, M. Sheikholeslami, Abderrahim Wakif
2020 Heliyon  
Furthermore, the Weissenberg number reduces the skin factor and speed up the heat and mass transport rate in the lower and upper branch solutions.  ...  The similarity procedure is utilized to modify the leading PDEs into a non-linear system of ODEs and then analyzed through a significant technique namely bvp4c based on the collocation method.  ...  Introduction The phenomena of mass transport involve owing to the variance of the species concentration confirmed in a solution, it transfers them from the vicinity of higher to lower concentrations.  ... 
doi:10.1016/j.heliyon.2020.e04565 pmid:32775728 pmcid:PMC7394875 fatcat:7ww5bfkag5byjkxr44fnxvn3va

Using Design to Support the Creation of Street Art: A three-phase experiment supported by the DDArtS system

Paris Xyntarianos-Tsiropinas, Thomas Spyrou, Konstantinos Bailas
2018 EVA London 2018  
of the D.P.S.D.E. painted the mural using existing traditional techniques to transfer the original design from small to large scale on a wall.  ...  In the second phase, one of the authors, an experienced street artist, pained the same mural directly on the wall, without using measurement or transfer techniques.  ...  So, at this stage of the experiment, they would already know how to use tools and techniques like a grid, a transfer paper, a pounce pattern, a stencil, etc.  ... 
doi:10.14236/ewic/eva2018.53 dblp:conf/eva/Xyntarianos-Tsiropinas18 fatcat:epk7g76hezgr5ncdpky7hq2ahi

Special educational issue on 'Basics and application of biophysical techniques in photosynthesis and related processes'—Part B

Johannes Messinger, A. Alia, Govindjee
2009 Photosynthesis Research  
Acknowledgments During our editing process, each of us remembered our mentors as well as those who were, or are, associated with us, some directly related to the topic of this special issue and some not  ...  A. Nugent, Vittal K. Yachandra, Kenneth Sauer, Melvin P. Klein, and Wolfgang Lubitz for teaching him various biophysical techniques and for being excellent mentors.  ...  MRI is a non-destructive and non-invasive technique that can be used to study the dynamics of plant water relations and water transport. Henk van As, Tom Scheenen, and Frank J.  ... 
doi:10.1007/s11120-009-9494-3 pmid:19915955 fatcat:u6rkd3ss6zdqvbn3eq7g3gqr4a

Special educational issue on 'Basics and application of biophysical techniques in photosynthesis and related processes'

Johannes Messinger, A. Alia, Govindjee
2009 Photosynthesis Research  
Acknowledgments During our editing process, each of us remembered our mentors as well as those who were, or are, associated with us, some directly related to the topic of this special issue and some not  ...  A. Nugent, Vittal K. Yachandra, Kenneth Sauer, Melvin P. Klein, and Wolfgang Lubitz for teaching him various biophysical techniques and for being excellent mentors.  ...  MRI is a non-destructive and non-invasive technique that can be used to study the dynamics of plant water relations and water transport. Henk van As, Tom Scheenen, and Frank J.  ... 
doi:10.1007/s11120-009-9471-x pmid:19639276 fatcat:ukg5hdrqb5ghhgwz6ysocqcrum

Extended depth-of-field using sharpness transport across color channels

Frédéric Guichard, Hoang-Phi Nguyen, Régis Tessières, Marine Pyanet, Imène Tarchouna, Frédéric Cao, Brian G. Rodricks, Sabine E. Süsstrunk
2009 Digital Photography V  
We compare our technique with other approaches that also aim to increase the DoF such as Wavefront coding.  ...  In this paper we present an approach to extend the Depth-of-Field (DoF) for cell phone miniature camera by concurrently optimizing optical system and post-capture digital processing techniques.  ...  Such a lens is then easily mass producible for applications such as the ones of the cameraphone business.  ... 
doi:10.1117/12.805915 dblp:conf/dphoto/GuichardNTPTC09 fatcat:7me2igx7mjcsznbqphlnzydgry

FRIB and the GW170817 Kilonova [article]

A. Aprahamian, R. Surman, A. Frebel, G.C. McLaughlin, A. Arcones, A.B. Balantekin, J. Barnes, Timothy C. Beers, Erika M. Holmbeck, Jinmi Yoon, Maxime Brodeur, T.M. Sprouse, Nicole Vassh (+32 others)
2018 arXiv   pre-print
Here we compile a selection of scientific contributions to the workshop, broadly representative of progress in r-process studies since the GW170817 event.  ...  interpretation of the GW170817 kilonova, what we can learn about the astrophysical site or sites of the r process from this event, and the advances in nuclear experiment and theory most crucial to pursue in light  ...  Los Alamos National Laboratory is operated by Los Alamos National Security, LLC, for the National Nuclear Security Administration of US Department of Energy (Contract DEAC52-06NA25396).  ... 
arXiv:1809.00703v1 fatcat:bubw27atrvbppmbnmjxkemgpay
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