Analysis on unevenness of skin color using the melanin and hemoglobin components separated by independent component analysis of skin color image

Nobutoshi Ojima; Izumi Fujiwara; Yayoi Inoue; Norimichi Tsumura; Toshiya Nakaguchi; Kayoko Iwata

doi:10.1117/12.873494

17 February 2011 Analysis on unevenness of skin color using the melanin and hemoglobin components separated by independent component analysis of skin color image

Nobutoshi Ojima, Izumi Fujiwara, Yayoi Inoue, Norimichi Tsumura, Toshiya Nakaguchi, Kayoko Iwata

Author Affiliations +

Proceedings Volume 7897, Optical Interactions with Tissue and Cells XXII; 78971M (2011) https://doi.org/10.1117/12.873494
Event: SPIE BiOS, 2011, San Francisco, California, United States

Abstract

Uneven distribution of skin color is one of the biggest concerns about facial skin appearance. Recently several techniques to analyze skin color have been introduced by separating skin color information into chromophore components, such as melanin and hemoglobin. However, there are not many reports on quantitative analysis of unevenness of skin color by considering type of chromophore, clusters of different sizes and concentration of the each chromophore. We propose a new image analysis and simulation method based on chromophore analysis and spatial frequency analysis. This method is mainly composed of three techniques: independent component analysis (ICA) to extract hemoglobin and melanin chromophores from a single skin color image, an image pyramid technique which decomposes each chromophore into multi-resolution images, which can be used for identifying different sizes of clusters or spatial frequencies, and analysis of the histogram obtained from each multi-resolution image to extract unevenness parameters. As the application of the method, we also introduce an image processing technique to change unevenness of melanin component. As the result, the method showed high capabilities to analyze unevenness of each skin chromophore: 1) Vague unevenness on skin could be discriminated from noticeable pigmentation such as freckles or acne. 2) By analyzing the unevenness parameters obtained from each multi-resolution image for Japanese ladies, agerelated changes were observed in the parameters of middle spatial frequency. 3) An image processing system modulating the parameters was proposed to change unevenness of skin images along the axis of the obtained age-related change in real time.

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Nobutoshi Ojima, Izumi Fujiwara, Yayoi Inoue, Norimichi Tsumura, Toshiya Nakaguchi, and Kayoko Iwata "Analysis on unevenness of skin color using the melanin and hemoglobin components separated by independent component analysis of skin color image", Proc. SPIE 7897, Optical Interactions with Tissue and Cells XXII, 78971M (17 February 2011); https://doi.org/10.1117/12.873494

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