Main image processing apparatus, sub image processing apparatus and control method thereof

PURPOSE: A main image processing unit, an image processing unit and a control method for transmitting a control command with a main image processing device by using a sub image processing unit are provided to supply the convenience of the use by controlling the main image processing unit. CONSTITUTION: A subimage processing unit receives a touch input of a user(S110). The contents corresponding to the touch region in which the touch input is received is discriminated(S120). The spot dancing of the touch input is detected(S130). The control command about the contents is transmitted to the main image processing unit. The contents is changed corresponding to the detected spot.