1. An imaging device comprising: a member for picking up a first image and a second image; a member for calculating a feature quantity of a luminance in a central portion and a peripheral portion of the first image, and adjusting the luminance in the first image such that an addition value of a value that is obtained by multiplying the feature quantity of the luminance in the central portion of the first image by a first coefficient and the feature quantity of the luminance in the peripheral portion of the first image becomes a first target value; and a member for calculating the feature quantity of the luminance in the central portion and the peripheral portion of the second image, and adjusting the luminance in the second image such that an addition value of a value that is obtained by multiplying the feature quantity of the luminance in the central portion of the second image by a second coefficient, which is set independently of the first coefficient, and the feature quantity of the luminance in the peripheral portion of the second image becomes a second target value.