An imaging means acquires an imaged image in a predetermined imaging range for each predetermined frame rate. An image processing means performs image processing on image data of the image captured by the imaging means. A first setting means (S420) sets the imaging means to image a predetermined first range in the imaging range with a predetermined first frame rate. A second setting means (S430) sets the imaging means to image a second range, which is a part of the imaging range imaged by the imaging means and is narrower than the first range, with a second frame rate higher than the first frame rate. A determination means (S420) selects one of the first setting means and the second setting means depending on process contents that the image processing performs.