Method of discriminating longitudinal melanonychia and visualising malignancy thereof

摘要

A three-dimensional vector is defined by the three components of the RGB parameters for each pixel within a digital color image of melanonychia striata. The latitudinal variable and the longitudinal variable within the RGB space of the three-dimensional vector are calculated, and a differentiation index is calculated from the distribution of prescribed points on the basis of the latitudinal variable and the longitudinal variable, thereby being able to differentiate between a malignant and benign melanonychia striata by separating the differentiation index at a threshold value. Moreover, the degree of malignancy of melanonychia striata can be visualized by displaying the distribution of points.