EFFICIENT AND ROBUST VESSEL DETECTION SYSTEM

A proposition of method for envisioning the depth and thickness of a blood vessel in hypodermis layer
in the human skin by applying an algorithm to analyze the diffuse reflectance images at three
isosbestic wavelengths: 420, 585, and 800 nm. Monte Carlo and Monte Carlo Multi-Layer simulation
clearly presented a relation among optical densities, depth, and thickness of the blood vessel region
under specifies concentrations of melanin in the epidermis layer and blood in dermis layer.
Experiments with additional extension of an array of LEDs surrounding the CCD camera indicate that
if there is no obstruction of the three isosbestic wavelength such as foreign light ray from surrounding
area, the focused circular blood region can be visualized with errors of 2% for the depth and 9% for the
thickness to the given values. Arrangement of the arrays of LEDs are calculated and placed in a certain
degree to form a circle to ensure homogenous light ray been propagate onto the human skin.