A contrast calculating unit calculates, as each of a contrast of a high frequency component and a contrast of a low frequency component of a transformed radiographic image, a contrast in a gradient direction of an edge portion in an analysis region with each of analysis points set by an analysis point setting unit being the center of the analysis region. A ratio calculating unit calculates, for each gradient direction, a ratio of the contrast of the high frequency component to the contrast of the low frequency component. A determining unit determines the smallest ratio as an index indicating the body motion, and determines whether or not there is a body motion during an imaging operation to take the radiographic image based on a result of statistical processing of the indexes at the analysis points. A display control unit displays a result of the determination on a display unit.
