16. The non-transitory storage medium according to claim 15 , further causing the computer to execute: setting a plurality of areas in the input image and computing feature data for each of the plurality of areas; calculating the likelihood value for each of the plurality of areas; referring to the dictionary data storage unit that stores area information related to the plurality of areas and the dictionary data, and calculating the parameter for each of the plurality of areas based on the likelihood value and the dictionary data.
15. The non-transitory storage medium according to claim 12 , further causing the computer to execute: calculating a likelihood value between the feature data and the dictionary data, and calculating the parameter based on the likelihood value.