A visualization method for hand cleanness using fluorescent spectrum

The goal of this study is to develop a method for the visualization of the distribution of the contamination of the human hands by using fluorescent spectrum. To archive this, we first found the optimal combinations of the excitation and the emission wavelengths that accurately predict the contamination level. This optimization was conducted using the excitation-emission matrices of the contamination components wiped from hands. Then, we visualized the distribution of the contamination on hands by using the spectral imaging of the hands measured with the optimal wavelength combinations. This result suggests that the proposed method can detect and visualize the contaminated areas of the hands.