A low-cost mobile device for skin tone measurement using filter array spectrum sensor

Skin tone measurement has a proven market and has many identified and potential applications. In this work, we use an innovative filter array spectrum sensor to achieve a low-cost mobile device for skin-tone and skin-spectrum measurement. The core technology of this spectrum sensor on-a-chip is based on nano-optical filter array which can be integrated onto a regular photo-detector such as CMOS imager. It is expected that the potential low price under mass production would make chip-scale color/spectrum sensing instrument suitable to be integrated into commercial-grade gadgets, while providing professional-grade color/spectrum information. We demonstrated an innovative method for skin tone (skin spectrum) measurement using this innovative filter array spectrum sensor. Experimental results shows spectral aggregated relative error (ARE) = 0.0118 and Δxy = 0.0037 can be achieved by this proposed approach.