1. A driver imaging apparatus comprising: an imaging unit that captures an image of a face of a driver of a vehicle; a first image processing unit that performs image processing on a wide portion of the face of the driver in a first image captured by the imaging unit, using the first image; and a second image processing unit that performs image processing on a part of the face of the driver in a second image captured by the imaging unit at a higher exposure than the exposure of the first image captured by the imaging unit, using the second image.