Special Section on Color Imaging: Processing, Hard Copy, and Applications

Analysis of tristimulus interdifference and contextual color correction

[+] Author Affiliations
Alessandro Rizzi

Università degli Studi di Milano, Dipartimento di Tecnologie dell’Informazione, Via Bramante 65, Crema (CR), Italy

Davide Gadia

Università degli Studi di Milano, Dipartimento di Informatica e Comunicazione, Via Comelico 39, Milano, Italy

Daniele Marini

Università degli Studi di Milano, Dipartimento di Informatica e Comunicazione, Via Comelico 39, Milano, Italy

J. Electron. Imaging. 15(4), 041202 (November 22, 2006). doi:10.1117/1.2372799
History: Received May 27, 2005; Revised May 16, 2006; Accepted May 16, 2006; Published November 22, 2006
Text Size: A A A

We explore how an RGB representation can be computed from a spectral description of real images, with many different colors. To pass from spectral distribution to tristimulus values, several color-matching functions (CMFs) were proposed, derived from experimental setups with simplified visual conditions, considering the colors pointwise and independently from any visual context. A high interdifference is observed in cone spatial distribution between human subjects, without any corresponding significant difference in final color sensation. It is likely that a spatial compensation is performed by human observers that strongly decreases the subjectivity in color perception, and we ask if a similar principle should be considered in digital imaging. We investigate the interdifference among some CMFs when used to compute color information in complex visual conditions, where multiple, spatially distributed different colors are present. This is relevant in synthetic image generation of scenes under different illuminants, computed at the spectral energy distribution at 5-nm intervals, to be converted into RGB for monitor display. The analysis of the interdifference among tristimulus colors obtained using different CMFs shows a significant decrease of the interdifference when a contextual color correction is applied, based on Von Kries or Retinex methods.

Figures in this Article
© 2006 SPIE and IS&T

Citation

Alessandro Rizzi ; Davide Gadia and Daniele Marini
"Analysis of tristimulus interdifference and contextual color correction", J. Electron. Imaging. 15(4), 041202 (November 22, 2006). ; http://dx.doi.org/10.1117/1.2372799


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.