Apparatus for authenticating an object and method thereof

A method for processing information, the method comprising:

• obtaining a captured image capturing a target object in a real environment;
• obtaining an illumination condition in the real environment;
• generating a variation image as an image of a registration object reflecting the illumination condition based on data of the registration object and the obtained illumination condition;
• and
• collating the registration object with the target object based on a feature of the variation image and a feature of the captured image,
• wherein the variation image has an illumination condition similar to the captured image when captured and is an image in a plurality of variation images generated in advance based on the data of the registration object and each of a plurality of illumination conditions.

A non-transitory computer-readable storage medium storing a program causing that configures a computer to:

• obtain a captured image capturing a target object in a real environment;
• obtain an illumination condition in the real environment;
• generate a variation image as an image of a registration object reflecting the illumination condition based on data of the registration object and the obtained illumination condition;
• and
• collate the registration object with the target object based on a feature of the variation image and a feature of the captured image,
• wherein the variation image has an illumination
• condition similar to the captured image when captured and is an image in a plurality of variation images generated in advance based on the data of the registration object and each of a plurality of illumination conditions.