Patent Document ID: 10074551
Application ID: 15278623
Patent Status: 1

Claim One:
1. A position detection apparatus comprising a processor configured with a program to perform operations comprising: operation as an image obtaining unit configured to obtain a shape; operation as a provisional value setting unit configured to set a provisional parameter comprising an estimated value for a parameter associated with the shape; operation as a calculation unit configured to: extract a plurality of detection points associated with the shape; select, from the detection points, one or more combinations of selection points; generate a plurality of hypothesis shapes based on the one or more combinations of selection points; and calculate a plurality of potential values for the parameter, each potential value of the plurality of potential values corresponding to at least one of the plurality of hypothesis shapes; operation as an extraction unit configured to extract, from the plurality of potential values calculated by the calculation unit, one or more of the plurality of potential values having an error relative to the provisional parameter that falls within a predetermined range; and operation as a determination unit configured to determine, from the one or more of the plurality of potential values extracted by the extraction unit, a potential value with a smallest error as a final estimated value for the parameter.