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Adaptive stray-light compensation in dynamic multi-projection mapping

Christian Siegl, Matteo Colaianni, Marc Stamminger, Frank Bauer
2017 Computational Visual Media  
In this work, we enhance a multi-projector system for dynamic projection mapping by handling various physical stray-light effects: interreflection, projector black-level, and environmental light in real  ...  We show how all these effects can be efficiently simulated and accounted for at runtime, resulting in significantly improved projection mapping results.  ...  Conclusions In this paper we have presented a fast and reliable system for correcting projection mapping artefacts in dynamic scenes arising from interreflection, projector black-level, and environmental  ... 
doi:10.1007/s41095-017-0090-8 fatcat:nwutfueqxne4njld453az5uyfq

Creating Hdr Video Content For Visual Quality Assessment Using Stop-Motion

Zofia Baranczuk, Dennis Kuepper, Iris Sprow, Tobias Stamm, Peter Zolliker
2013 Zenodo  
Publication in the conference proceedings of EUSIPCO, Marrakech, Morocco, 2013  ...  ACKNOWLEDGEMENTS The project was partially funded by the Swiss Commission for Technology and Innovation (CTI) and supported by X-Rite Europe GmbH and the EU COST Action IC1005 HDRi.  ...  To minimize the effect of stray light, a black tubus with 35 cm length, a 6 cm diameter and a 4 cm opening was placed around the lens (see An offset, a color transform matrix and a compensation for stray  ... 
doi:10.5281/zenodo.43358 fatcat:fzrggym3mfd3njfzkdipzxmysy

Design Requirements for the Wide-field Infrared TransientExplorer (WINTER)

Danielle Frostig, John W. Baker, Joshua Brown, Richard S. Burruss, Kristin Clark, Gábor Fűrész, Nicolae Ganciu, Erik Hinrichsen, Viraj R. Karambelkar, Mansi M. Kasliwal, Nathan P. Lourie, Andrew Malonis (+2 others)
2021 arXiv   pre-print
In particular, we discuss new methods for tolerance simulations, eliminating stray light, and maximizing image quality of a fly's-eye design that slices the telescope's focus onto 6 non-buttable, IR detectors  ...  projects.  ...  Stray Light and Filter Prescriptions To meet WINTER's sensitivity requirement, we must manage stray light in the form of either ghost images (from reflections off optical coatings), or scattered light  ... 
arXiv:2105.01219v1 fatcat:bh5w4evubffdtm4gzgedzenjbm

Progress report on the optical system for closed-loop testing of the Multiple Mirror Telescope adaptive secondary mirror

Roland J. Sarlot, Cynthia J. Bresloff, James H. Burge, Bruce C. Fitz-Patrick, Patrick C. McGuire, Brian L. Stamper, Chunyu Zhao, Robert E. Fischer, Warren J. Smith
1999 Current Developments in Optical Design and Optical Engineering VIII  
An optical design is presently being implemented to test the deformable mirror's closed loop control system by optically projecting an artificial star to simulate starlight in the actual telescope.  ...  The optical design relies on two wavelength computer generated holograms used to remove spherical aberration as well as aid in the alignment of the test system optics by projecting alignment patterns.  ...  ACKNOWLEDGMENTS A project of this magnitude is not possible without many people's assistance.  ... 
doi:10.1117/12.368200 fatcat:ipra3yz5qvfhvev6zz2rbh3chq

Electric field compensation and sensing with a single ion in a planar trap [article]

Sankaranarayanan Selvarajan, Nikos Daniilidis, Sönke Möller, Rob Clark, Frank Ziesel, Kilian Singer, Ferdinand Schmidt-Kaler, Hartmut Häffner
2011 arXiv   pre-print
For this, we compensate undesired static electric fields in a planar RF trap and characterize the static fields over an extended region along the trap axis.  ...  We observe a strong buildup of stray charges around the loading region on the trap resulting in an electric field of up to 1.3 kV/m at the ion position.  ...  Subsequently, the stray field was mapped along the trap axis over a length of approximately 2 mm. The results are shown in Fig. 3 . We measured stray fields as large as 1300 V/m.  ... 
arXiv:1106.2730v1 fatcat:p53q7ylr5fbd5msmg7mcp463qa

Successive Wide Viewing Angle Appearance Manipulation with Dual Projector Camera Systems [article]

Toshiyuki Amano, Isao Shimana, Shun Ushida, Kunioki Kono
2014 ICAT-EGVE 2014 - International Conference on Artificial Reality and Telexistence and Eurographics Symposium on Virtual Environments  
This type of system comprises several surrounding projector camera units, where each unit projects illumination independently onto a different aspect of a target object based on feedback from the projector  ...  In this study, we investigated the use of successive omnidirectional appearance manipulation for the cooperative control of multiple projector camera systems.  ...  The superimposed dynamic range technique allows a highly dynamic range display and color compensation on printed media based on illumination projection [BI08] .  ... 
doi:10.2312/ve.20141364 fatcat:nvo7aozbevahvlnmwf4uu7qc5a

Performance relighting and reflectance transformation with time-multiplexed illumination

Andreas Wenger, Andrew Gardner, Chris Tchou, Jonas Unger, Tim Hawkins, Paul Debevec
2005 ACM SIGGRAPH 2005 Papers on - SIGGRAPH '05  
We investigate several lighting bases for representing the sphere of incident illumination using a set of discrete LED light sources, and we estimate and compensate for subject motion using optical flow  ...  We present a technique for capturing an actor's live-action performance in such a way that the lighting and reflectance of the actor can be designed and modified in postproduction.  ...  An ambient occlusion map for a frame of a dynamic performance is shown in Figure 9 (d).  ... 
doi:10.1145/1186822.1073258 fatcat:lwxx332bnbe5rbswodzhbsdskm

Projection defocus analysis for scene capture and image display

Li Zhang, Shree Nayar
2006 ACM SIGGRAPH 2006 Papers on - SIGGRAPH '06  
Using the same projector defocus model and estimation technique, we also propose a defocus compensation method that filters a projection image in a spatiallyvarying, depth-dependent manner to minimize  ...  In this paper, we present methods for robust scene capture and enhanced image display based on projection defocus analysis. We model a projector's defocus using a linear system.  ...  Alternatively, the beam-splitter can be placed in a custom-designed chamber that absorbs all forms of stray light.  ... 
doi:10.1145/1179352.1141974 fatcat:av63byjjxfgvnnrwm7ecey6yre

Projection defocus analysis for scene capture and image display

Li Zhang, Shree Nayar
2006 ACM Transactions on Graphics  
Using the same projector defocus model and estimation technique, we also propose a defocus compensation method that filters a projection image in a spatiallyvarying, depth-dependent manner to minimize  ...  In this paper, we present methods for robust scene capture and enhanced image display based on projection defocus analysis. We model a projector's defocus using a linear system.  ...  Alternatively, the beam-splitter can be placed in a custom-designed chamber that absorbs all forms of stray light.  ... 
doi:10.1145/1141911.1141974 fatcat:wv64jvtc7recdg2fawf4yyvbzu

Electromagnetic analysis of breakdown conditions in JET

F. Maviglia, R. Albanese, A. Alonso, P.J. Lomas
2011 Fusion engineering and design  
The images show, coherently with the model, that the avalanche evolves dynamically towards a region where the stray field is perpendicular to the first wall.  ...  This paper presents the breakdown studies carried out in the framework of JET Enhancement Projects for Plasma Control Upgrade (PCU) and Enhanced Radial Field Amplifier (ERFA), to obtain plasma formation  ...  The dynamic flux maps do not take into account the plasma current (in any case small) contribution.  ... 
doi:10.1016/j.fusengdes.2010.12.042 fatcat:mkare6shpbfi3h6rm7jm6hvj3e

ASPIICS: a giant, white light and emission line coronagraph for the ESA proba-3 formation flight mission

P. L. Lamy, S. Vivès, W. Curdt, J. Davila, J.-M. Defise, Silvano Fineschi, S. Kuzin, W. Schmutz, L. Damé, P. Heinzel, Russel Howard, K. Tsinganos (+2 others)
2017 International Conference on Space Optics — ICSO 2010  
The combined imaging and spectral diagnostics capabilities available with ASPIICS will allow mapping the velocity field of the corona both in the sky plane (directly on the images) and along the line-of-sight  ...  The diffraction fringe from the occulter and the vignetted pupil which degrades the spatial resolution prevent useful observations of the white light corona inside typically 2-2.5 solar radii (Rsun).  ...  STRAY LIGHT CONSIDERATIONS Of prime importance for a coronagraph is its stray light level.  ... 
doi:10.1117/12.2309188 fatcat:yueh2femgrgtrjwi25eu4vqvju

Polarization entanglement-enabled quantum holography [article]

Hugo Defienne, Bienvenu Ndagano, Ashley Lyons, Daniele Faccio
2021 arXiv   pre-print
Instead, the holographic information is encoded in the second order coherence of entangled states of light.  ...  Information is encoded into the polarisation degree of the entangled state, allowing us to image through dynamic phase disorder and even in the presence of strong classical noise, with enhanced spatial  ...  Detailled experimental setup with dynamic diffusers and stray light.  ... 
arXiv:1911.01209v3 fatcat:vrsqfktvznhlle6qumpho2ahme

A novel optical design for the stereo channel of the imaging system SIMBIOSYS for the BepiColombo ESA mission

Gabriele Cremonese, Luciano Calamai, Stefano Debei, Vania Da Deppo, Giampiero Naletto, Enrico Flamini, Josiane Costeraste, Errico Armandillo, Nikos Karafolas
2017 International Conference on Space Optics — ICSO 2008  
For stray-light suppression, an efficient baffling system able to well decouple the optical paths of the two subchannels has been designed.  ...  The main scientific objective is the 3D global mapping of the entire surface of Mercury with a scale factor of 50 m per pixel at periherm in five different spectral bands.  ...  Also the in-field stray-light has to be taken into account and assessed.  ... 
doi:10.1117/12.2308273 fatcat:7bufqlhvffgu7lnuql3g5pplim

Performance relighting and reflectance transformation with time-multiplexed illumination

Andreas Wenger, Andrew Gardner, Chris Tchou, Jonas Unger, Tim Hawkins, Paul Debevec
2005 ACM Transactions on Graphics  
We investigate several lighting bases for representing the sphere of incident illumination using a set of discrete LED light sources, and we estimate and compensate for subject motion using optical flow  ...  We present a technique for capturing an actor's live-action performance in such a way that the lighting and reflectance of the actor can be designed and modified in postproduction.  ...  An ambient occlusion map for a frame of a dynamic performance is shown in Figure 9(d) .  ... 
doi:10.1145/1073204.1073258 fatcat:bpn46fkounciziuioit56qxzua

Miniature biplanar coils for alkali-metal-vapor magnetometry [article]

Michael C. D. Tayler, Kostas Mouloudakis, Rasmus Zetter, Dominic Hunter, Vito G. Lucivero, Sven Bodenstedt, Lauri Parkkonen, Morgan W. Mitchell
2022 arXiv   pre-print
Performance of these sensors such as dynamic range may be enhanced through magnetic field control.  ...  Characterization of the field profile using ^87Rb free-induction spectroscopy and other techniques show >96 cell and a compact stray field contour of ∼1 the cell.  ...  ACKNOWLEDGEMENT This work has received funding from: the European Union's Horizon 2020 research and innovation programme under project macQsimal (Grant Agreement 820393); Horizon H2020  ... 
arXiv:2204.01370v1 fatcat:ux3klaxecfcqfey7jabslzajke
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