1. A method of determining document characteristics prior to processing the document in a document scanner comprising: capturing at least a portion of an input image of documents in an input tray; transmitting said images to a processor; determining characteristics of said documents; processing said documents based on said characteristics; wherein at least one characteristic is related to document condition or content; and detecting whether notes or labels are adhered to the documents; and disabling or enabling ultrasonic zones in at least one location down the document based on said at least one characteristic or the detection of a note or label.
8. The method of claim 1 , wherein the at least one characteristic related to document condition or content is at least one of document length, document width, document position, document orientation, color, or defects.