An image processing apparatus includes: a transformation information calculating unit configured to calculate, based on the motion information of an imaged image making up an imaged moving picture, transformation information relating to a plurality of compositing target images serving as compositing targets of an imaged image making up the imaged moving picture; and a decoration image determining unit configured to calculate a shift quantity between a first compositing target image that is the compositing target image, and a second compositing target image that is the compositing target image after transformation according to the transformation information to determine a decoration image to be added to the periphery of the second compositing target image based on the shift quantity.