Posture measurement apparatus, posture measurement method, and non-transitory computer readable medium

A posture measurement method for causing a posture measurement apparatus to perform processing of:

• holding a shape model representing a shape of a back of a subject as a function of a plurality of parameters;
• calculating a value of a predetermined objective function using a candidate point cloud as a candidate of a point cloud indicating the shape of the back of the subject and the shape model as inputs;
• and
• correcting the parameters in such a way as to minimize the value of the predetermined objective function using a constraint condition of the parameters and the shape model as inputs.

A non-transitory computer readable medium storing a program for causing a computer to execute the following processing of:

• holding a shape model representing a shape of a back of a subject as a function of a plurality of parameters;
• calculating a value of a predetermined objective function using a candidate point cloud as a candidate of a point cloud indicating the shape of the back of the subject and the shape model as inputs;
• and
• correcting the parameters in such a way as to minimize the value of the predetermined objective function using a constraint condition of the parameters and the shape model as inputs.