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Real-time adaptive radiometric compensation.
IEEE Trans Vis Comput Graph. 2008 Jan-Feb; 14(1):97-108.IT

Abstract

Recent radiometric compensation techniques make it possible to project images onto colored and textured surfaces. This is realized with projector-camera systems by scanning the projection surface on a per-pixel basis. Using the captured information, a compensation image is calculated that neutralizes geometric distortions and color blending caused by the underlying surface. As a result, the brightness and the contrast of the input image is reduced compared to a conventional projection onto a white canvas. If the input image is not manipulated in its intensities, the compensation image can contain values that are outside the dynamic range of the projector. These will lead to clipping errors and to visible artifacts on the surface. In this article, we present an innovative algorithm that dynamically adjusts the content of the input images before radiometric compensation is carried out. This reduces the perceived visual artifacts while simultaneously preserving a maximum of luminance and contrast. The algorithm is implemented entirely on the GPU and is the first of its kind to run in real-time.

Authors+Show Affiliations

Grundhöfer A
Bauhaus-University Weimar, Media Faculty, Weimar, Germany. grundhoe@uni-weimar.de
Bimber O
No affiliation info available

MeSH

AlgorithmsColorColorimetryComputer GraphicsComputer SystemsImage EnhancementImage Interpretation, Computer-AssistedImaging, Three-DimensionalInformation Storage and RetrievalLightingNumerical Analysis, Computer-Assisted

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

17993705

Citation

Grundhöfer, Anselm, and Oliver Bimber. "Real-time Adaptive Radiometric Compensation." IEEE Transactions On Visualization and Computer Graphics, vol. 14, no. 1, 2008, pp. 97-108.
Grundhöfer A, Bimber O. Real-time adaptive radiometric compensation. IEEE Trans Vis Comput Graph. 2008;14(1):97-108.
Grundhöfer, A., & Bimber, O. (2008). Real-time adaptive radiometric compensation. IEEE Transactions On Visualization and Computer Graphics, 14(1), 97-108.
Grundhöfer A, Bimber O. Real-time Adaptive Radiometric Compensation. IEEE Trans Vis Comput Graph. 2008 Jan-Feb;14(1):97-108. PubMed PMID: 17993705.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Real-time adaptive radiometric compensation. AU - Grundhöfer,Anselm, AU - Bimber,Oliver, PY - 2007/11/13/pubmed PY - 2008/2/13/medline PY - 2007/11/13/entrez SP - 97 EP - 108 JF - IEEE transactions on visualization and computer graphics JO - IEEE Trans Vis Comput Graph VL - 14 IS - 1 N2 - Recent radiometric compensation techniques make it possible to project images onto colored and textured surfaces. This is realized with projector-camera systems by scanning the projection surface on a per-pixel basis. Using the captured information, a compensation image is calculated that neutralizes geometric distortions and color blending caused by the underlying surface. As a result, the brightness and the contrast of the input image is reduced compared to a conventional projection onto a white canvas. If the input image is not manipulated in its intensities, the compensation image can contain values that are outside the dynamic range of the projector. These will lead to clipping errors and to visible artifacts on the surface. In this article, we present an innovative algorithm that dynamically adjusts the content of the input images before radiometric compensation is carried out. This reduces the perceived visual artifacts while simultaneously preserving a maximum of luminance and contrast. The algorithm is implemented entirely on the GPU and is the first of its kind to run in real-time. SN - 1077-2626 UR - https://www.unboundmedicine.com/medline/citation/17993705/Real_time_adaptive_radiometric_compensation_ DB - PRIME DP - Unbound Medicine ER -