Incident light information acquisition method, incident light information acquisition system, and information processing device

An incident light information acquiring system comprising:

• a reference object whose shape and material are known;
• an image capturing device that captures an image of the reference object while part of incident light applied thereto is being blocked;
• and
• an information processing apparatus that acquires a brightness distribution of incident light by using the captured image,
• wherein the information processing apparatus includes
• a partial incident light information acquiring section that acquires, according to a predetermined model equation, a brightness distribution of partial incident light produced by blocking part of the incident light, on a basis of the image of the reference object in each of a plurality of images captured when the incident light is blocked in different directions, and
• an overall incident light information acquiring section that acquires a brightness distribution of overall incident light by calculating brightness distributions of partial incident light.

An information processing apparatus comprising:

• a captured image acquiring section that acquires an image captured of a reference object whose shape and material are known while part of incident light applied thereto is being blocked;
• a partial incident light information acquiring section that acquires, according to a predetermined model equation, a brightness distribution of partial incident light produced by blocking part of the incident light, on a basis of the image of the reference object in each of a plurality of images captured when the incident light is blocked in different directions;
• and
• an overall incident light information acquiring section that acquires a brightness distribution of overall incident light by calculating brightness distributions of partial incident light.

A non-transitory, computer readable storage medium containing a computer program, which when executed by a computer, causes the computer to perform an incident light information acquiring method by carrying out actions, comprising:

• acquiring an image captured of a reference object whose shape and material are known while part of incident light applied thereto is being blocked;
• acquiring, according to a predetermined model equation, a brightness distribution of partial incident light produced by blocking part of the incident light, on a basis of the image of the reference object in each of a plurality of images captured when the incident light is blocked in different directions;
• and
• acquiring a brightness distribution of overall incident light by calculating brightness distributions of partial incident light.