Demosaicing method for digital cameras with white-RGB color filter array

Jongjoo Park, Euee Seon Jang, Jong Wha Chong

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

Demosaicing, or color filter array (CFA) interpolation, estimates missing color channels of raw mosaiced images from a CFA to reproduce full-color images. It is an essential process for single-sensor digital cameras with CFAs. In this paper, a new demosaicing method for digital cameras with Bayer-like W-RGB CFAs is proposed. To preserve the edge structure when reproducing full-color images, we propose an edge direction-adaptive method using color difference estimation between different channels, which can be applied to practical digital camera use. To evaluate the performance of the proposed method in terms of CPSNR, FSIM, and S-CIELAB color distance measures, we perform simulations on sets of mosaiced images captured by an actual prototype digital camera with a Bayer-like W-RGB CFA. The simulation results show that the proposed method demosaics better than a conventional one by approximately +22.4% CPSNR, +0.9% FSIM, and +36.7% S-CIELAB distance.

Original languageEnglish
Pages (from-to)164-173
Number of pages10
JournalETRI Journal
Volume38
Issue number1
DOIs
StatePublished - 2016 Feb

Keywords

  • Bayer-like White-RGB
  • Color filter array interpolation
  • Demosaicing
  • Digital camera
  • W-RGB color filter array

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