An image processing apparatus including an imposition processing section which arranges plural page images on an output area to form an imposed image; and a tint block composition processing section which composes a tint block image on the imposed image, wherein the imposition processing section arranges at least two page images in different directions, and the tint block composition processing section establishes an angle of rotation of the tint block image for each page image so that a relationship between a direction of the each page image and a direction of the tint block image is kept constant, and executes the imposition by utilizing the angle of rotation.