Skin pigmentation download data human spectrophotometry

What is the range and distribution of spectral signatures across a population? Spectra are collected over a broad spectral range, from the ultraviolet to the shortwave infrared nm to nm , to provide a data set useful for a wide variety of applications. The analysis addresses instrument uncertainty, subject variability, and between-subject variability.

Key contributors to the spectral structure of human skin include water, melanin, and hemoglobin. Future studies will be directed at expanding the set of measurements, including the incorporation of results from other researchers. Photo caption: A sampling of images from subjects' test area above. The reflectance spectrum of the mean of the set of spectra collected from 51 human subjects with blue shaded area representing the population variability for all subjects and the orange spectra representing the range of variation in reflectance factors observed below.

Share Facebook. Tape and arm were imaged simultaneously using a thermal infrared camera. The emissivity was set on the camera to the known value for electrical tape. The emissivity was altered manually until the skin temperature using thermal imaging software was equal to the initial tape temperature. This provided the calculated emissivity value of the skin.

Participants were grouped according to skin pigmentation, quantified using the Fitzpatrick skin phototyping scale and reflectance spectrophotometry. Results: The mean calculated emissivity for the 65 participants was 0.

Conclusion: These data suggest that skin pigmentation does not affect thermal emissivity measurement of skin temperature using thermal infrared imaging. This study will aid further research into the application of thermal infrared imaging as a screening or bedside diagnostic tool in clinical practice.