Spectral Based Color Reproduction Compatible with sRGB System under Mixed Illumination Conditions for E-Commerce

A standard color space, sRGB, has been widely used for reproducing the accurate color in the internet system. However, this color is accurate only under the sRGB reference viewing environment. In practice, the customers viewing environments are not always standard conditions. It is known that the multispectral color reproduction can be used to obtain highly accurate colors which are independent of device and viewing conditions. However, since the recent color reproduction system is based on conventional RGB or CMYK imaging technology, it is a huge task to change resources and devices in the market to be those in the multispectral technology. In our previous research, the spectral turn technique was proposed to achieve the spectral based color reproduction in the E-commerce with a high compatibility to the sRGB system. However the haploscopic method, used to compare colors on monitor and an object, was not compatible with the exact viewing conditions in real life. In this paper we propose more practical spectral turn technique using the revised mixed chromatic adaptation model, S-LMS(2001) applied with simultaneous binocular (SMB) matching method for more correct color appearance matching between softcopy and hardcopy under the practical viewing conditions.