Derivation method of discrimination threshold of nail apparatus melanoma
AssigneeMitaka Kohki Co., Ltd.
InventorsTakayuki Sota, Juzo Fujii, Atsushi Nakamura, Shinya Ohtsubo
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Abstract
An derivation method of a nail apparatus melanoma discrimination threshold includes a first step of assuming a color image of longitudinal melanonychia as three-dimensional vectors each composed of RGB parameter values of each pixel and finding an angle between each of the three-dimensional vectors and a reference vector, a second step of finding a probability of occurrence according to a frequency distribution of the angles found in the first step, and a third step of finding, according to the probability of occurrence found in the second step, a threshold for a parameter to discriminate whether the longitudinal melanonychia is malignant or benign.
Claims2
A derivation method of a nail apparatus melanoma discrimination threshold, comprising:
- representing a color image of longitudinal melanonychia as three-dimensional vectors each having RGB parameter values of each pixel and finding an angle between each of the three-dimensional vectors and a reference vector;
- finding a probability of occurrence according to a frequency distribution of the found angles;
- and
- according to the probability of occurrence, finding a threshold for a parameter to discriminate whether the longitudinal melanonychia is malignant or benign.
Dependencies are inferred from the claim text.