Reflectance measurement using digital camera and a protecting dome with built in light source.

Area of Science:

• Biomedical Optics
• Medical Imaging
• Dermatology

Background:

• Skin reflectance analysis is crucial for medical diagnosis, monitoring, and screening.
• Understanding skin's chemical, physical, and metabolic changes relies on reflectance measurements.

Purpose of the Study:

• To design and validate a digital camera-based imaging system for accurate skin reflectance measurement.
• To achieve high spatial and multi-channel spectral resolution in skin reflectance imaging.

Main Methods:

• Development of a digital camera imaging system with a spectral range of 450-980 nm.
• Validation using a color checkerboard, comparing system data with known values and spectrometer measurements.
• Compensation for diffuse interreflections using a correction factor for both integrating sphere and lighting dome.

Main Results:

• The developed system achieves high spatial and four-channel spectral resolution.
• Accuracy was validated against a color checkerboard and a spectrometer, showing comparable performance.
• The system's characteristics were found to be independent of the specific camera used.

Conclusions:

• The proposed imaging system provides a viable and accurate method for skin reflectance measurement.
• This system offers a valuable tool for medical diagnosis, follow-up, and screening in dermatology.
• The camera-independent characteristics suggest broad applicability and potential for further development.