Compensation of Spectral Mismatch to Enhance WRGB Demosaicking

Po-Hsun Su 1    Po-Chang Chen 2   Homer H. Chen 1

1. National Taiwan University      2. Himax Imaging Inc.

IEEE International Conference on Image Processing (ICIP) 2015


     The presence of spectral mismatch between the components of a WRGB color filter array severely affects the performance of demosaicking. This paper presents a novel method that compensates for the spectral mismatch and greatly enhances the accuracy of R, G, and B interpolation. The method is tested on a two-megapixel WRGB CMOS image sensor. The results show that the proposed method brings the performance of WRGB demosaicking to an unprecedented level competitive with that of the state-of-the-art Bayer demosaicking.


  • P.-H. Su, P.-C. Chen, and H. Chen, "Compensation of spectral mismatch to enhance WRGB demosaicking," in Proc. IEEE Int. Conf. Image Process., Sept. 2015. [PDF]


*WRGB data are captured with a 1600 x 1200 CMOS sensor provided by Himax Imaging Inc.

Without compensation (Maze artifact)

With compensation (Maze artifact removed)