• KSII Transactions on Internet and Information Systems
    Monthly Online Journal (eISSN: 1976-7277)

Edge-preserving Demosaicing Method for Digital Cameras with Bayer-like W-RGB Color Filter Array

Vol. 8, No.3, March 31, 2014
10.3837/tiis.2014.03.017, Download Paper (Free):

Abstract

A demosaicing method for a Bayer-like W-RGB color filter array (CFA) is proposed. When reproducing images from a W-RGB CFA, conventional color separation methods for W-RGB CFA are likely to cause blurring near the edges due to rough averaging using a color ratio of neighboring pixels. Moreover, these methods cannot be applied to real-life digital cameras with W-RGB CFA because the methods were proposed under an ideal situation, W=R+G+B, not a real-life situation, W ≠ R+G+B. To improve edge performance, we propose a method of constant color difference assumption with inversed weight, which uses information from all edge directions for interpolating all missing color channels. The proposed method calculates the correlation between W, R, G, and B to enable its application to real-life digital cameras with W-RGB CFA. Simulations were performed to evaluate the proposed method using images captured from a real-life digital camera with W-RGB CFA. Simulation results shows that we can demosaic by using the proposed algorithm compared with the conventional one in about +34.79% SNR, +11.43% PSNR, +1.54% SSIM and 14.02% S-CIELAB error. Thus, the proposed method demosaics better than the conventional methods.


Statistics

Show / Hide Statistics

Statistics (Cumulative Counts from December 1st, 2015)
Multiple requests among the same browser session are counted as one view.
If you mouse over a chart, the values of data points will be shown.


Cite this article

[IEEE Style]
Jongjoo Park and Jongwha Chong, "Edge-preserving Demosaicing Method for Digital Cameras with Bayer-like W-RGB Color Filter Array," KSII Transactions on Internet and Information Systems, vol. 8, no. 3, pp. 1011-1025, 2014. DOI: 10.3837/tiis.2014.03.017

[ACM Style]
Park, J. and Chong, J. 2014. Edge-preserving Demosaicing Method for Digital Cameras with Bayer-like W-RGB Color Filter Array. KSII Transactions on Internet and Information Systems, 8, 3, (2014), 1011-1025. DOI: 10.3837/tiis.2014.03.017