Ms. Kenzo Kitajima Profile

Kenzo Kitajima

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Proceedings Article | 11 March 2014 Paper

Preliminary experiments on quantification of skin condition

Kenzo Kitajima, Hitoshi Iyatomi

Proceedings Volume 9037, 90371B (2014) https://doi.org/10.1117/12.2044018

KEYWORDS: Skin, Polarization, Image analysis, Gold, Feature extraction, Feature selection, Medical imaging, Standards development, Performance modeling, Information science

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In this study, we investigated a preliminary assessment method for skin conditions such as a moisturizing property and its fineness of the skin with an image analysis only. We captured a facial images from volunteer subjects aged between 30s and 60s by Pocket Micro (R) device (Scalar Co., Japan). This device has two image capturing modes; the normal mode and the non-reflection mode with the aid of the equipped polarization filter. We captured skin images from a total of 68 spots from subjects' face using both modes (i.e. total of 136 skin images). The moisture-retaining property of the skin and subjective evaluation score of the skin fineness in 5-point scale for each case were also obtained in advance as a gold standard (their mean and SD were 35.15 +/- 3.22 (μS) and 3.45 +/- 1.17, respectively). We extracted a total of 107 image features from each image and built linear regression models for estimating abovementioned criteria with a stepwise feature selection. The developed model for estimating the skin moisture achieved the MSE of 1.92 (μS) with 6 selected parameters, while the model for skin fineness achieved that of 0.51 scales with 7 parameters under the leave-one-out cross validation. We confirmed the developed models predicted the moisture-retaining property and fineness of the skin appropriately with only captured image.

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