1. An image processing apparatus comprising: a plurality of processing units that shares image processing; a memory that stores a parameter specifying an operation of each of said processing units; and a control unit that controls said plurality of processing units, wherein said control unit includes: a sequence management unit that stores a sequence table indicating a sequence of activation of and completion of processing by each of said processing units, activates each of said processing units according to the sequence table, and confirms completion of processing by each of said processing units; and a parameter setting unit that stores a memory map indicating an address of a parameter for each of said processing units, and prior to activation of each of said processing units by said sequence management unit, reads a parameter for each said processing unit to be activated, from said memory unit according to the memory map, and sets the parameter to each said processing unit according to the read result.