Method and equipment for measuring coverage density of a...

A - Human Necessities – 61 – B

Patent

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A61B 5/107 (2006.01)

Patent

CA 2442116

The invention relates to a method for measuring the coverage density of multiple components on a surface, in particular skin hair coverage, by dividing the surface to be measured in a number of zones, comparing the visual appearance of these zones to measuring means comprising reference surfaces assigned with numerical values, so as to allow assigning a numerical value to the measured zones in function of the visual parameter of said series of reference surfaces. The invention also relates to equipment therefor, comprising grid means for dividing the surface to be measured in zones and means for measuring coverage density, involving several sets of density scales comprising n reference surfaces with a visual density which serially decreases by the fractional factors n-1 / n, n-2 / n, , 1 / n.

L'invention concerne une méthode permettant de mesurer la densité de recouvrement de plusieurs composantes sur une surface, en particulier la densité de la chevelure. Cette méthode consiste à diviser la surface à mesurer en plusieurs zones et à comparer l'aspect visuel de ces zones à un moyen de mesure comprenant des surfaces de référence auxquelles on a attribué des valeurs numériques, pour attribuer des valeurs numériques aux zones mesurées en fonction du paramètre visuel des séries de surfaces de référence. L'invention concerne également un dispositif destiné à la mise en oeuvre de cette méthode. Ce dispositif comprend une grille permettant de diviser la surface à mesurer en zones et un moyen permettant de mesurer la densité de recouvrement, faisant intervenir plusieurs séries d'échelles de densité comprenant n surfaces de référence avec une densité visuelle décroissant en série suivant les facteurs n-1 / n, n-2 / n, , 1/n.

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