An image processing apparatus which segments a raster image of a region having a predetermined width and a predetermined height includes an acquiring unit configured to acquire print data, a plurality of rendering units each configured to perform rendering in regions each having the predetermined width and a height smaller than the predetermined height based on the print data to generate a raster image of a region having the predetermined width and the predetermined height, the rendering being performed in parallel by the plurality of rendering units, and a segmenting unit configured to segment the generated raster image of the region having the predetermined width and the predetermined height into raster images of a plurality of segment regions each having a width smaller than the predetermined width and the predetermined height.