COLOR AND HIGH-DYNAMIC-RANGE IMAGING

Unsupervised corrections of unknown chromatic dominants using a Brownian-path-based Retinex algorithm

[+] Author Affiliations
Alessandro Rizzi

University of Milano, Department of Information Technology, Via Bramante, 65, 26013 Crema, Italy E-mail: rizzi@dti.unimi.it

Daniele Marini

University of Milano, Department of Information Science, Via Comelico, 39, 20100 Milano, Italy

Luigi Rovati

University of Modena and Reggio Emilia I.N.F.M. and Department of Information Engineering Via Vignolese, 905 41100 Modena, Italy

Franco Docchio

University of Brescia, Department of Electronics for Automation, Via Branze, 38, 25123 Brescia, Italy

J. Electron. Imaging. 12(3), 431-441 (Jul 01, 2003). doi:10.1117/1.1584051
History: Received Jan. 29, 1999; Revised Oct. 24, 2000; Revised Mar. 3, 2003; Accepted Mar. 6, 2003; Online July 23, 2003
Text Size: A A A

An experimental analysis of chromatic equalization based on a new implementation of the Retinex algorithm is presented. The experiments are carried out on a colored Mondrian patchwork illuminated with different commercial light sources and on synthetic images generated with a photometric ray tracer using different illuminants. Regarding the Mondrian patchwork, the spectral characteristics of the bulbs and the reflected light from each patch are measured using a commercial spectrometer. From the measured data, synthetic images of the patchwork with different illuminants are created and processed by the Retinex algorithm. The chromatic correction capabilities of the Retinex implementation have been measured and compared with unfiltered values and with the results of another Retinex implementation and classic color equalization algorithms. Results show that Retinex performs an unsupervised color correction without requiring any information about the spectral composition of the illuminant. © 2003 SPIE and IS&T.

© 2003 SPIE and IS&T

Citation

Alessandro Rizzi ; Daniele Marini ; Luigi Rovati and Franco Docchio
"Unsupervised corrections of unknown chromatic dominants using a Brownian-path-based Retinex algorithm", J. Electron. Imaging. 12(3), 431-441 (Jul 01, 2003). ; http://dx.doi.org/10.1117/1.1584051


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.