Imaging Components, Systems, and Processing

Compensating for color artifacts in the design of technical kaleidoscopes

[+] Author Affiliations
Šárka Němcová, Jiří Čáp, Jan Hošek

Czech Technical University in Prague, Faculty of Mechanical Engineering, Technická 4, Praha 6, 16607, Czech Republic

Vlastimil Havran, Jiří Bittner

Czech Technical University in Prague, Faculty of Electrical Engineering, Technická 2, Praha 6, 16627, Czech Republic

Opt. Eng. 55(11), 113104 (Nov 23, 2016). doi:10.1117/1.OE.55.11.113104
History: Received June 23, 2016; Accepted November 1, 2016
Text Size: A A A

Abstract.  In the applications of computer graphics, bidirectional texture function (BTF) is used for realistic and predictive rendering. The goal of current research is to get a surface representation indistinguishable from the real world. We developed, built, and tested a portable instrument for BTF acquisition based on kaleidoscopic imaging. We discuss the color issues we experienced after the initial tests. We show that the same color balance cannot be applied to the whole image as the spectral response of the instrument varies depending on the position within the image. All optical elements were inspected for their contributions to the spectral behavior of the instrument. A software simulator of a mathematical model of the device was implemented. We found a way to implement all these contributions into the image processing pipeline. In this way, the correct white balance for each individual pixel in the image is found and applied, allowing for a more faithful color representation. Also proposed is an optimized dielectric protective layer for the kaleidoscope’s mirrors causing the least possible color aberration.

Figures in this Article
© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Šárka Němcová ; Vlastimil Havran ; Jiří Čáp ; Jan Hošek and Jiří Bittner
"Compensating for color artifacts in the design of technical kaleidoscopes", Opt. Eng. 55(11), 113104 (Nov 23, 2016). ; http://dx.doi.org/10.1117/1.OE.55.11.113104


Tables

Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

Advertisement
  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.