Patent ID: 9064180
Filing Date: 2015-06-23
Classification: A61B,G01J,G06K,G06T,H04N

Abstract:
1. A method for characterizing the tone of the skin or integuments of a person, comprising the following steps: a) capturing at least one digital colour image of at least one determined zone of skin or of integuments, said image being defined by a multiplicity (N) of pixels, each pixel having a grey level, with the aid of a digital camera or a digital photographic apparatus, and transmitting said digital colour image to a digital image processing device for processing and recording said at least one digital image therein; b) splitting the digital colour image thus recorded into three colour planes: a red plane R, a green plane G, and a blue plane B, with said digital image processing device; c) extracting each of these planes R, G, B; and calculating and logging, with said digital processing device, on each plane the grey level value for each of the N pixels, thereby providing N grey level values, which are processed mathematically by mathematical calculation means, to obtain at least one value selected from a graphical grey value, a statistical grey value, and at least one average grey value characteristic of the grey levels for each plane, corresponding to a grey value characterizing the colour of the skin; d) plotting a histogram of each plane R, Plane G, and plane B from the digital image in the form of a curve in a plane, and for which the vertical axis represents the number of pixels or the proportion of pixels in the image for each colour plane R, G, and B, and the horizontal axis represents the values of the grey levels of the pixels of the image, or vice versa, thereby obtaining respectively a histogram R, a histogram G, and a histogram B, said method, including determining the colour characteristic of the skin or integuments by calculating the tightness, denoted (Δ e) evaluating the Luminosity L from the value of the grey level resulting from at least some of the N pixels of the image for each colour plane of at least two colour planes of the three colour planes R, G, B; and f) characterizing the tone of the skin or integuments from both the combination of the value characterizing the colour of the skin or integuments and of the Luminosity value L.