Color interpolation algorithm for the sony-RGBW color filter array

Jonghyun Kim, Moon Gi Kang

Research output: Contribution to journalConference articlepeer-review

5 Citations (Scopus)


Recently, a CFA sensor including a W channel has been developed. Since the W channel receives brightness information, it has a broad spectrum band compared to primary colors (Red, Green, Blue) and exhibits a high SNR. A camera using the CFA sensor obtains only certain type of color information for each pixel, so a color interpolation method is used to restore the full resolution image. In this paper, we propose a new color interpolation method for Sony-RGBW CFA. The proposed method is edge-adaptive and preferentially restores the W channel with a high sampling rate. In the next step, the R, G, and B channels are restored in the color difference domain using the W channel with the full resolution. Experimental results showed that the reconstructed image obtained by applying the proposed algorithm to the Sony-RGBW is superior to the image restored by conventional method in terms of SNR and visual confirmation.

Original languageEnglish
Article number439
JournalIS and T International Symposium on Electronic Imaging Science and Technology
Publication statusPublished - 2018
Event16th Image Processing: Algorithms and Systems Symposium 2018 - Burlingame, United States
Duration: 2018 Jan 282018 Feb 1

Bibliographical note

Funding Information:
This research was supported by Basic Science Research Program through the National Research Foundation of Korea(NRF) funded by the Ministry of Science, ICT and Future Planning (No. 2015R1A2A1A14000912)

Publisher Copyright:
© 2018 Society for Imaging Science and Technology.

All Science Journal Classification (ASJC) codes

  • Computer Graphics and Computer-Aided Design
  • Computer Science Applications
  • Human-Computer Interaction
  • Software
  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics


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