1. A method for determining erythemal skin index, comprising the following steps: - an image of an area of skin sample and a white sample, - determining normalized values of parameters of red, green, blue for the above sample section of skin - skin erythema index is determined based on the normalized values obtained in the previous shage.2. . A method according to claim 1, wherein determining the normalized parameter values of red, green, blue color to the skin portion of the sample and the sample of white color, wherein: - each above picture determine the prevailing values of red, green and blue colors - determining parameters of red, green and blue color white the above samples, - the parameters are corrected skin color portion of the image, based on the parameters received in the previous shage.3. A method according to Claim. 1 or 2, wherein the image is obtained by photographing using podsvetki.4. A method according to claim. 3, which uses LED podsvetka.5. A method according to Claim. 1 or 2, wherein the sample is a white paper towel or white list.6. A method according to claim. 3, wherein the prevailing values of red, green and blue colors are determined by filtering the dark and light areas and averaging over the different points, uniformly coating izobrazhenie.7. A method according to Claim. 1 or 2, wherein the determining normalized values of red. green and blue by the algorithm, the inverse algorithm belogo.8 balance. A method according to Claim. 1 or 2, wherein the determining normalized values of red. green and blue on the basis of heuristic algorithms with Utilized1. Способ определения эритемного индекса кожи, включающий следующие шаги:- получают изображение образца участка кожи и образца белого цвета- определяют нормализованные значения параметров красного, зеленого, синего цвета для вышеуказанного образца участка кожи- определяют эритемный индекс кожи, на основании нормализованных значений, полученных на предыдущем шаге.2. Способ по п. 1,