1. An image processing apparatus comprising: a storage section to be used when rasterization processing is performed with respect to intermediate language form data created from page description language form data; a processor including a number of operation sections; and the processor further including a control section to control the operation sections to perform the rasterization processing with respect to the intermediate language form data, wherein the control section generates a plurality of segmented regions by dividing each of the plurality of bands of the intermediate language form data into a plurality of pieces based on the number of the operation sections, and assigns each of the segmented regions to a respective one of the operation sections for executing the rasterization processing.