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Characterizing skin color before and after 100-m sprinting
Color Research and Application ( IF 1.4 ) Pub Date : 2021-05-11 , DOI: 10.1002/col.22679
Li Jiang 1 , Han Wang 2 , Xiaohui Zhang 2 , Cheng Gao 2 , Kaida Xiao 3 , Manuel Melgosa 4 , Changjun Li 2
Affiliation  

We studied skin color in participants before and after a 100-m sprint using a Konica Minolta CM-2600d spectrophotometer. Four body positions (forehead, cheek, neck, and inner forearm) were measured for the approximately 30 students (non-professional runners) who participated in the experiment. Skin reflectance was measured three times at each position before running and again soon afterward. Analysis of the data showed that average measurement repeatability (mean color difference from the mean [MCDM]) was 0.5, 0.4, 0.3, and 0.2 CIELAB units for forehead, cheek, neck, and inner forearm, respectively. However, average skin color differences produced by running were 1.8, 2.2, 2.0, and 1.7 CIELAB units for forehead, cheek, neck, and inner forearm positions, respectively, which are considerably higher than repeatability before or after running. Furthermore, appearance variation was analyzed in the CIELAB space, and it was found that sprinting for 100 m considerably changes the values of the red-green a* coordinate, while the lightness L* and yellow-blue b* coordinates remain almost constant. More specifically, on average, a* decreases after running for the forehead, cheek, and neck positions, while the opposite is true for the inner forearm position. The findings in this article may be useful to test previous physical models, achieve more realistic images of human skin after sprinting, and contribute to work of CIE TC 1-92 on skin spectra database.

中文翻译:

表征 100 米冲刺前后的肤色

我们使用柯尼卡美能达 CM-2600d 分光光度计研究了参与者在 100 米冲刺前后的肤色。对参与实验的大约 30 名学生(非专业跑步者)测量了四种身体姿势(前额、脸颊、颈部和前臂内侧)。跑步前在每个位置测量皮肤反射率 3 次,之后不久再次测量。数据分析表明,前额、脸颊、颈部和前臂内侧的平均测量重复性(与平均值 [MCDM] 的平均色差)分别为 0.5、0.4、0.3 和 0.2 CIELAB 单位。然而,跑步产生的平均肤色差异分别为前额、脸颊、颈部和前臂内侧位置的 1.8、2.2、2.0 和 1.7 CIELAB 单位,这大大高于跑步前后的可重复性。a * 坐标,而亮度L * 和黄蓝b * 坐标几乎保持不变。更具体地说,平均而言,在前额、脸颊和颈部位置跑步后,a * 会降低,而前臂内侧位置则相反。本文中的发现可能有助于测试先前的物理模型,在冲刺后获得更逼真的人体皮肤图像,并有助于 CIE TC 1-92 在皮肤光谱数据库上的工作。
更新日期:2021-05-11
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