Environment matting into photographs using coloured RTcams

Chuan Li, P. Hall, P. Willis

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

There has been continuing interest in using environment matting to capture the real-world's reflection and refraction from a foreground object. Environment matting require a calibrated warp, which is often defined non-parametrically. Although this is a powerful approach it suffers from two basic limitations: (i) there is a "blind spot" that cannot be a calibrated; (ii) a slight change in the object requires a full recalibration.This paper introduces a parametric approach that can overcome both of these limitations. We build upon a generalised model of a non-linear camera called an RTcam (Rational Tensor Camera, introduced in Section 3), for the first time showing its value to environment matting. In addition, we show how a restriction on RTcams can simulate the change in colour of an object as it appears in a coloured reflector (refractor). Hence we account for both geometric and colour changes with a single mathematical model. Finally, we show how, using the same camera model, the reflector properties can mapped from one to another.
LanguageEnglish
Title of host publicationIET Conference Publications
DOIs
StatusPublished - 2008
EventIET 5th European Conference on Visual Media Production - London, UK United Kingdom
Duration: 27 Nov 200828 Nov 2008

Conference

ConferenceIET 5th European Conference on Visual Media Production
CountryUK United Kingdom
CityLondon
Period27/11/0828/11/08

Fingerprint

Cameras
Color
Refraction
Tensors
Mathematical models

Cite this

Li, C., Hall, P., & Willis, P. (2008). Environment matting into photographs using coloured RTcams. In IET Conference Publications DOI: 10.1049/cp:20081074

Environment matting into photographs using coloured RTcams. / Li, Chuan; Hall, P.; Willis, P.

IET Conference Publications. 2008.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Li, C, Hall, P & Willis, P 2008, Environment matting into photographs using coloured RTcams. in IET Conference Publications. IET 5th European Conference on Visual Media Production, London, UK United Kingdom, 27/11/08. DOI: 10.1049/cp:20081074
Li C, Hall P, Willis P. Environment matting into photographs using coloured RTcams. In IET Conference Publications. 2008. Available from, DOI: 10.1049/cp:20081074
Li, Chuan ; Hall, P. ; Willis, P./ Environment matting into photographs using coloured RTcams. IET Conference Publications. 2008.
@inproceedings{3e33dd52e3c7461c839dabe9d96cedfc,
title = "Environment matting into photographs using coloured RTcams",
abstract = "There has been continuing interest in using environment matting to capture the real-world's reflection and refraction from a foreground object. Environment matting require a calibrated warp, which is often defined non-parametrically. Although this is a powerful approach it suffers from two basic limitations: (i) there is a {"}blind spot{"} that cannot be a calibrated; (ii) a slight change in the object requires a full recalibration.This paper introduces a parametric approach that can overcome both of these limitations. We build upon a generalised model of a non-linear camera called an RTcam (Rational Tensor Camera, introduced in Section 3), for the first time showing its value to environment matting. In addition, we show how a restriction on RTcams can simulate the change in colour of an object as it appears in a coloured reflector (refractor). Hence we account for both geometric and colour changes with a single mathematical model. Finally, we show how, using the same camera model, the reflector properties can mapped from one to another.",
author = "Chuan Li and P. Hall and P. Willis",
year = "2008",
doi = "10.1049/cp:20081074",
language = "English",
booktitle = "IET Conference Publications",

}

TY - GEN

T1 - Environment matting into photographs using coloured RTcams

AU - Li,Chuan

AU - Hall,P.

AU - Willis,P.

PY - 2008

Y1 - 2008

N2 - There has been continuing interest in using environment matting to capture the real-world's reflection and refraction from a foreground object. Environment matting require a calibrated warp, which is often defined non-parametrically. Although this is a powerful approach it suffers from two basic limitations: (i) there is a "blind spot" that cannot be a calibrated; (ii) a slight change in the object requires a full recalibration.This paper introduces a parametric approach that can overcome both of these limitations. We build upon a generalised model of a non-linear camera called an RTcam (Rational Tensor Camera, introduced in Section 3), for the first time showing its value to environment matting. In addition, we show how a restriction on RTcams can simulate the change in colour of an object as it appears in a coloured reflector (refractor). Hence we account for both geometric and colour changes with a single mathematical model. Finally, we show how, using the same camera model, the reflector properties can mapped from one to another.

AB - There has been continuing interest in using environment matting to capture the real-world's reflection and refraction from a foreground object. Environment matting require a calibrated warp, which is often defined non-parametrically. Although this is a powerful approach it suffers from two basic limitations: (i) there is a "blind spot" that cannot be a calibrated; (ii) a slight change in the object requires a full recalibration.This paper introduces a parametric approach that can overcome both of these limitations. We build upon a generalised model of a non-linear camera called an RTcam (Rational Tensor Camera, introduced in Section 3), for the first time showing its value to environment matting. In addition, we show how a restriction on RTcams can simulate the change in colour of an object as it appears in a coloured reflector (refractor). Hence we account for both geometric and colour changes with a single mathematical model. Finally, we show how, using the same camera model, the reflector properties can mapped from one to another.

UR - http://www.scopus.com/inward/record.url?scp=84868974081&partnerID=8YFLogxK

UR - http://dx.doi.org/10.1049/cp:20081074

U2 - 10.1049/cp:20081074

DO - 10.1049/cp:20081074

M3 - Conference contribution

BT - IET Conference Publications

ER -