1. A radiographic apparatus comprising: a radiation source that irradiates radiation toward a subject; radiation source control means for controlling a voltage of the radiation source; radiation source moving means for moving the radiation source with respect to the subject; radiation source movement control means for controlling the radiation source moving means; a filter having a high voltage region through which the radiation irradiated when the radiation source is in a high voltage state passes and a low voltage region through which the radiation irradiated when the radiation source is in a low voltage state passes; a holder that moves in accordance with a movement of the radiation source and holds the filter at one of a plurality of holes provided in the holder; holder rotation means for rotating the holder; holder rotation control means for controlling the holder rotation means; radiation detection means for detecting the radiation passed through the filter and the subject; and image generation means for generating an image based on an output of the radiation detection means.