Imaging device driver, imaging device driving method, and image signal processor

An imaging device driver that drives an imaging device, comprising a controller, is provided. The imaging device has the light receiving surface divided into a plurality of pixel blocks. Each pixel block has a plurality of pixels. The pixel generates a pixel signal according to received light amount. The imaging device generates an image signal. The image signal is formed by a plurality of the pixel signals. The image signal corresponds to an optical image of an object during a single frame period. The controller causes the pixel located at a first and a second area in the pixel block to generate the pixel signal in a first and a second frame period, respectively, if the imaging device is driven to output the image signal while thinning out the pixel signals. The second frame period follows the first frame period.