Perceptually Based Appearance Modification for Compliant Appearance Editing

Law, Alvin; Aliaga, Daniel G.; Sajadi, Behzad; Majumder, Aditi; Pizlo, Zygmunt

doi:10.1111/j.1467-8659.2011.02035.x

Cited by 20 publications

(5 citation statements)

References 25 publications

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“…A quad-tree-based light transport measurement [Sen et al 2005] is used, which takes up to several hours and thus is not practical for dynamic surfaces. This idea was recently extended in [Law et al 2011;Aliaga et al 2012] to generate a high-quality multi-projector compensation. Projector-camera systems can also be used to directly estimate the defocus of the projected pixels.…”

Section: Related Workmentioning

confidence: 99%

Augmenting physical avatars using projector-based illumination

et al. 2013

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Figure 1: Our system allows augmentation of a physical avatar (a) with projector-based illumination, significantly increasing its expressiveness. In (b) the target performance is shown. The appearance under controlled and ambient illumination is shown in (c) and (d). AbstractAnimated animatronic figures are a unique way to give physical presence to a character. However, their movement and expressions are often limited due to mechanical constraints. In this paper, we propose a complete process for augmenting physical avatars using projector-based illumination, significantly increasing their expressiveness. Given an input animation, the system decomposes the motion into low-frequency motion that can be physically reproduced by the animatronic head and high-frequency details that are added using projected shading. At the core is a spatio-temporal optimization process that compresses the motion in gradient space, ensuring faithful motion replay while respecting the physical limitations of the system. We also propose a complete multi-camera and projection system, including a novel defocused projection and subsurface scattering compensation scheme. The result of our system is a highly expressive physical avatar that features facial details and motion otherwise unattainable due to physical constraints.

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Section: Related Workmentioning

confidence: 99%

Augmenting physical avatars using projector-based illumination

et al. 2013

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“…By considering the local surface reflectance and the potential projector drift, the compensation can be adjusted to diminish these artifacts (right column). Upper right: High‐quality projection‐based appearance editing as proposed by Law et al [LAS*11]. Lower right: Compensation of indirect diffuse scattering by active and spatially varying reflectance modulation using photochromic inks illuminated by an array of ultraviolet LEDs [TIS16].…”

Section: Algorithmsmentioning

confidence: 99%

“…When projecting onto dark or strongly saturated surface pigments, it is desirable to avoid visually disturbing compensation errors resulting from the limited color gamut of the projector. Several methods automatically adjust the target colors outside of the displayable gamut to mitigate such artifacts [MJK11,LAS*11]. Menk and Koch proposed to use physically based computation based on spectral measurements in combination with HDR imaging to generate more accurate projection based augmentations [MK10].…”

Section: Algorithmsmentioning

confidence: 99%

Recent Advances in Projection Mapping Algorithms, Hardware and Applications

Grundhöfer

Iwai

2018

Computer Graphics Forum

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This State‐of‐the‐Art‐Report covers the recent advances in research fields related to projection mapping applications. We summarize the novel enhancements to simplify the 3D geometric calibration task, which can now be reliably carried out either interactively or automatically using self‐calibration methods. Furthermore, improvements regarding radiometric calibration and compensation as well as the neutralization of global illumination effects are summarized. We then introduce computational display approaches to overcome technical limitations of current projection hardware in terms of dynamic range, refresh rate, spatial resolution, depth‐of‐field, view dependency, and color space. These technologies contribute towards creating new application domains related to projection‐based spatial augmentations. We summarize these emerging applications, and discuss new directions for industries.

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“…While there have been many researches on Projection Mapping on static sculptures [1] [20] [30] [31], Dynamic Projection Mapping that can keep tracking of a moving target and aligning the projection at interactive level is still a challenge. To achieve high-quality results, the accuracy and the robustness of the system must achieve high requirements as to make light bundles be projected exactly onto the target object in real-time.…”

Section: Introductionmentioning

confidence: 99%