Special Section on Digital Photography

Adaptive color demosaicing and false color removal

[+] Author Affiliations
Mirko Guarnera

STMicroelectronics, Advanced System Technology Group, Stradale Primosole 50, 95121 Catania, Italy

Giuseppe Messina

STMicroelectronics, Advanced System Technology Group, Stradale Primosole 50, 95121 Catania, Italy

Valeria Tomaselli

STMicroelectronics, Advanced System Technology Group, Stradale Primosole 50, 95121 Catania, Italy

J. Electron. Imaging. 19(2), 021105 (May 26, 2010). doi:10.1117/1.3432486
History: Received April 20, 2009; Revised March 22, 2010; Accepted April 12, 2010; Published May 26, 2010; Online May 26, 2010
Text Size: A A A
Free

Color interpolation solutions drastically influence the quality of the whole image generation pipeline, so they must guarantee the rendering of high quality pictures by avoiding typical artifacts such as blurring, zipper effects, and false colors. Moreover, demosaicing should avoid emphasizing typical artifacts of real sensors data, such as noise and green imbalance effect, which would be further accentuated by the subsequent steps of the processing pipeline. We propose a new adaptive algorithm that decides the interpolation technique to apply to each pixel, according to its neighborhood analysis. Edges are effectively interpolated through a directional filtering approach that interpolates the missing colors, selecting the suitable filter depending on edge orientation. Regions close to edges are interpolated through a simpler demosaicing approach. Thus flat regions are identified and low-pass filtered to eliminate some residual noise and to minimize the annoying green imbalance effect. Finally, an effective false color removal algorithm is used as a postprocessing step to eliminate residual color errors. The experimental results show how sharp edges are preserved, whereas undesired zipper effects are reduced, improving the edge resolution itself and obtaining superior image quality.

© 2010 SPIE and IS&T

Citation

Mirko Guarnera ; Giuseppe Messina and Valeria Tomaselli
"Adaptive color demosaicing and false color removal", J. Electron. Imaging. 19(2), 021105 (May 26, 2010). ; http://dx.doi.org/10.1117/1.3432486


Access This Article
Sign in or create a new account to:
  • View FREE content
  • Sign up for Digital Library content alerts
  • Create saved search alerts
  • Gain access to institutional subscriptions remotely

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 new account to:
  • View FREE content
  • Sign up for Digital Library content alerts
  • Create saved search alerts
  • Gain access to institutional subscriptions remotely
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.