Method and apparatus for measuring skin texture

Details Method and apparatus for measuring skin texture Method and apparatus for measuring skin texture

A - Human Necessities

61

B

A61B 5/103 (2006.01)

Patent

CA 2635183

A first image of an area of an individual's skin (2) illuminated by a light source (3) via a polarizing filter (4) is obtained by a digital camera (1) via a second polarizing filter (5) arranged to filter visible light having the same polarity as light passing through the first polarizing filter (4). This image is then processed by a computer (6) which utilises the detected levels of light and a model (15-20) of the interaction of light with chromophores present in the skin (2) to determine expected levels light returned by the illuminated area of skin (2) on the basis of determined concentrations of chromophores present in the skin. A second image of the individual's skin (2) illuminated by the light source (3) in the absence of the polarizing filter (4) is then obtained. A surface map indicative of skin texture is then determined based of the differences between the first and second images scaled by geometry data indicative of variations in the strength of illumination due to variations in surface geometry of the individual's skin (2) derived from the difference between the first obtained image and the expected appearance of the illuminated are of skin (2) based on the calculated estimated concentrations of chromophores.

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