To reduce capacity in a processing program by shortening the processing time in an image processing means for executing program processing of image data having auxiliary information.

The image processing means is constituted of a selection/reference means for specifying the auxiliary information having an instruction set with a first field for prescribing validation or invalidation of instructions depending on the auxiliary information and a second field for specifying the auxiliary information updated by the instructions, specifying the auxiliary information to be referred, and evaluating the auxiliary information depending on the state of the fields for prescribing the state of the specified auxiliary information, and an updating means for specifying the auxiliary information updated by the instruction, and updating the specified auxiliary information based on the operation results of an operation means.