Compensating for colour artefacts in the design of technical kaleidoscopes

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F16%3A00302951" target="_blank" >RIV/68407700:21230/16:00302951 - isvavai.cz</a>

Alternative codes found

RIV/68407700:21220/16:00302951

Result on the web

<a href="http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=2530908" target="_blank" >http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=2530908</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1117/12.2225166" target="_blank" >10.1117/12.2225166</a>

Result language

angličtina

Original language name

Compensating for colour artefacts in the design of technical kaleidoscopes

Original language description

In computer graphics and related fields, bidirectional texture function (BTF) is used for realistic and predictive rendering. BTF allows for the capture of fine appearance effects such as self-shadowing, inter-reflection and subsurface scattering needed for true realism when used in rendering algorithms. The goal of current research is to get a surface representation indistinguishable from the real world. We developed, produced and tested a portable instrument for BTF acquisition based on kaleidoscopic imaging. Here we discuss the colour issues we experienced after the initial tests. We show that the same colour balance cannot be applied to the whole picture as the spectral response of the instrument varies with the position in the image. All optical elements were inspected for their contributions to the spectral behaviour of the instrument. The off-the-shelf parts were either measured or the manufacturer’s data were considered. The custom made mirrors’ spectral reflectivity was simulated. The mathematical model of the instrument was made. We found a way how to implement all these contributions to the image processing pipeline. In this way, a correct white balance for each individual pixel in the image is found and applied, allowing for a more faithful colour representation. Also proposed is an optimized dielectric protective layer for the kaleidoscope’s mirrors.

Czech name

—

Czech description

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Type

D - Article in proceedings

CEP classification

JR - Other machinery industry

OECD FORD branch

—

Project

<a href="/en/project/GA14-19213S" target="_blank" >GA14-19213S: On-site acquisition, compression and rendering of spatially varying surface reflectances</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Proceedings of SPIE - The International Society for Optical Engineering

ISBN

9781510601413

ISSN

0277-786X

e-ISSN

—

Number of pages

9

Pages from-to

—

Publisher name

SPIE

Place of publication

Bellingham (stát Washington)

Event location

Brusel

Event date

Apr 3, 2016

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

000385792600003