In this research, we evaluate the visibility of age spot and freckle with changing the blood volume based on the actual facial color images and compare the result with that of pigmentation patterns generated by simulated spectral reflectance. We acquire the concentration distribution of melanin, hemoglobin and shading components by applying the independent component analysis on a facial color image. We reconstruct images by using the obtained melanin and shading concentration and the changed hemoglobin concentration to generate facial images with changing the blood volume. Finally, we evaluate the visibility of pigmentations using these images and compare with the result of pigmentation patterns based on simulated reflectance. In our previous study, we have already evaluated the visibility of pigmentation patterns, and the visibility became lower as the blood volume increases. However, we can see that a specific blood volume reduce the visibility of the actual pigmentations from the result of evaluating the skin color images.
Misa Hirose, Yuri Tatsuzawa, Saori Toyota, Norimichi Tsumura, "Evaluating Visibility of Age Spot and Freckle based on Analysis and Synthesis of Facial Color Image" in Proc. IS&T 22nd Color and Imaging Conf., 2014, pp 71 - 76, https://doi.org/10.2352/CIC.2014.22.1.art00011