Color Reproduction for Electronic Paper with Printed Color Filter Array

The color electronic paper (e-paper) based on a printed color filter array had been proposed recently, but the related image processing issues have not yet been discussed. The printed color e-paper offers the advantage of rapid driving capability and accurate intensity control for each color channel. However, its color gamut is comparatively narrower than that of multi-pigment color e-paper, and the output response curve is generally nonlinear. This leads to difficulties in color and tone reproduction when displaying an image on this new color e-paper. This paper discusses the practical issue of applying the traditional image processing pipeline to this new color e-paper and proposes an alternative approach to address the nonlinear response issue in printed color e-paper. With the proposed image pipeline, significant improvements in display quality can be achieved.