Skin pigmentation characterized by visible reflectance measurements

Reflectance Measurements of Human Skin

We use a novel image-based technique to measure the directional reflectance of living human skin. Using only a commercial-grade digital camera and electronic flash, we can collect many samples in a few minutes. By exploiting the body’s own curvature, we obtain data comprehensively covering a wide range of directions. We present results from several different individuals, showing interesting eff...

Mapping Pigmentation in Human Skin by Multi-Visible-Spectral Imaging by Inverse Optical Scattering Technique

Mapping pigmentation in human skin is expected to give useful information in reproducing and diagnosing various skin colors. In this research, maps of melanin, oxyhemoglobin and deoxy-hemoglobin in skin are estimated from multi-visible-spectral image by using an inverse optical scattering technique. In the inverse optical scattering technique, first of all, a forward model of optical scattering...

Visible Spectral Reflectance Measurements of the Galilean Satellites of Jupiter

New spectral reflectance measurements of the Galilean satellites of' Jupiter were obtained in November, 1975 at the 224 cm. telescope at Mauna Kea Observatory, Hawaii. A prism spectrograph with a silicon vidicon detector was used in the spectral region 0.3-1.06 pm. These new measurements are of a higher wavelength resolution than previous measurements. The results are compared with earlier meas...

DIFFUSE REFLECTANCE MEASUREMENTS FROM DIFFERENT SURFACES

Relative diffuse reflection measurements from the original and ground surfaces using a He-Ne laser are reported. The intensity measurements for the metallic, transparent dielectric, matte plastic surfaces and colored papers are presented. Our results indicate that among metallic surfaces tested, aluminum has the highest diffuse reflectance; while the original stainless steel surface shows the l...

Mapping pigmentation in human skin from multi-channel visible spectrum image by inverse optical scattering technique