Patent ID: 8559026

Claim:
An image processing device comprising: a plurality of control units configured to execute each of a plurality of functions regarding image data, the plurality of control units including at least a first control unit and a second control unit; and an accepting unit that accepts a user's selection indicating a function selected by a user, wherein: when a control capability of the first control unit has decreased, the second control unit sets the selected function executable and sets the functions other than the selected function unexecutable, wherein: at least one of the plurality of control units enables a user to select the function from among a selection candidate function determined by the at least one of the plurality of control units, the selection candidate function being a function that at least one control unit other than the first control unit is capable of executing; wherein the selection candidate function includes a first selection candidate and a second selection candidate; the at least one of the plurality of control units determines the first selection candidate that the at least one control unit other than the first control unit is capable of executing at a higher performance level; the at least one of the plurality of control units determines the second selection candidate that the at least one control unit other than the first control unit is capable of executing at a lower performance level; and the at least one of the plurality of control units controls a display unit to display the first and second selection candidates such that the first and second selection candidates are distinguishable from each other.