Patent ID: 8422088

Claim:
An image processing device comprising: a storage unit storing image data input from a reading unit when reading a document by the reading unit; a first image-data-processing unit having a function of performing a bill recognition process for the image data and processing the image data stored in the storage unit by performing the bill recognition process; a second image-data-processing unit detachably attached to the first image-data-processing unit, having a function of performing an illegal copy detection process, and processing the image data, stored in the storage unit by performing the illegal copy detection process; and a control unit configured to determine whether processing results of the first and second image-data-processing units are in a normal state at a predetermined interval, wherein, when at least one of the processing results of the first and second image-data-processing units is in an error state, the control unit stops all functions of the image processing device until both the processing results are checked as being in a normal state.