Information processing device and material specifying method

A material specifying method by an information processing device, the method comprising:

• acquiring a position and a posture of a subject in a real space on a basis of a captured image of the subject and acquiring a position and a posture on an imaging plane that correspond to the position and the posture of the subject in the real space;
• acquiring a position of a light source in the real space on a basis of the captured image;
• specifying a material of the subject on a basis of a reflection characteristic of the subject when a predetermined reflection model is applied to the captured image, using the position and the posture of the subject, the position and the posture on the imaging plane, and the position of the light source;
• and
• outputting data according to the specified material.

A computer program for a computer, comprising:

• by a space information acquisition unit, acquiring a position and a posture of a subject in a real space on a basis of a captured image of the subject, and acquiring a position and a posture on an imaging plane that correspond to the position and the posture of the subject in the real space;
• by a light source position specifying unit, acquiring a position of a light source in the real space on a basis of the captured image;
• by a material specifying unit, specifying a material of the subject on a basis of a reflection characteristic of the subject when a predetermined reflection model is applied to the captured image, using the position and the posture of the subject, the position and the posture on the imaging plane, and the position of the light source;
• and
• by an output data generation unit, outputting data according to the specified material.