Patent Document ID: 9137449
Application ID: 13820690
Patent Status: 1

Claim One:
1. An illuminance estimation model generation device comprising: a memory that stores a basic model indicating a plurality of relations for a plurality of subject conditions between a plurality of illuminances and a plurality of luminance of a plurality of captured images, which are obtained when a subject is imaged by changing an illuminance condition under the subject conditions; a processor configured to: acquire a captured image captured in a target space for illuminance estimation as a reference image; acquire illuminance of the target space at a time of imaging the reference image as reference illuminance; generate an illuminance estimation model indicating a relation between illuminance and luminance in the target space from a data value indicated as a pair of the reference illuminance and luminance of the reference image based on the basic model; and compare the reference image which is previously acquired and an image newly captured in the target space to newly acquire the newly captured image as the reference image, when a difference between the previously acquired reference image and the newly captured image is greater than a predetermined threshold value.