An image processing apparatus which performs image processing includes: a computing unit equipped with a plurality of arithmetic units each of which performs calculations based on a supplied microprogram; a storage unit adapted to store correspondence information between image processing and allocation of the plurality of arithmetic units to modules involved in the image processing; an acquisition unit adapted to acquire allocation information about allocations to the modules involved in image processing to be performed, from the storage unit; and a supply unit adapted to supply microprograms corresponding to processes of the modules involved in the image processing to be performed to the arithmetic units based on the acquired allocation information, wherein the storage unit stores the correspondence information according to device configuration of the image processing apparatus, and the acquisition unit acquires the allocation information according to the device configuration of the image processing apparatus.