1. An image processing apparatus comprising: a camera; a document sheet image determining portion configured to determine whether or not document sheet image data is contained in photographic image data that has been obtained by photographing with the camera installed on the image processing apparatus; an operation determining portion configured to determine whether or not operation image data is contained in the photographic image data, the operation image data showing a pattern of user's hand and corresponding to an operation for processing the document sheet image data; and an image processing portion configured to execute the processing of the document sheet image data based on the operation corresponding to the operation image data when the document sheet image determining portion determines that the document sheet image data is contained in the photographic image data and the operation determining portion determines that the operation image data is contained in the photographic image data.