Patent Document ID: 9736364
Application ID: 14671170
Patent Status: 1

Claim One:
1. A camera device attached to a vehicle, the camera device comprising: a first image sensor to sense an image based on light acquired by a first camera; and a processor in communication with the first image sensor, wherein the processor modifies an exposure time of the image sensed by the first image sensor based on a brightness level and a brightness distribution value of the image acquired by the first image sensor, wherein when the vehicle goes into a tunnel, the processor controls the exposure time of the first image sensor to be gradually increased, wherein when the vehicle goes out of the tunnel, the processor controls the exposure time of the first image sensor to be gradually decreased, wherein, in a case in which the brightness distribution value is equal to or greater than a second level in a state in which the brightness level of the photographed image is equal to or less than a first level, the processor controls the exposure time to be shorter than in a case in which the brightness distribution value is less than the second level in a state in which the brightness level is equal to or less than the first level, and wherein the processor controls the exposure time to be shorter as the brightness level becomes higher in a state in which the brightness level is greater than the first level.