Wide Color Gamut Imaging System Using a Multispectral Image Sensor for a Mobile Device

In this paper a system for a mobile device to generate a wide color gamut image is proposed. A RGB camera on a smartphone is combined with a multispectral image sensor, which is fabricated on top of a complementary metal-oxide semiconductor image sensor for a mobile device, capturing scenes with 16 spectral bands. Images from these sensors are fused using a color transfer technique to leverage the accurate color reproduction capability of the multispectral image sensor while preserving the image structures in the RGB image. It is claimed that the proposed multispectral image sensor improved color reproduction accuracy by 25% compared to a mobile RGB sensor, and the proposed system effectively produce a high-resolution wide color gamut image with high color fidelity.