Patent ID: 7710615

Claim:
A multi-stage scanning method of a scanner for increasing a scanning speed and enhancing an image quality, comprising the steps of: moving an optical module, in a forward direction, from a start position to a forward-internal position, and then enabling the optical module to scan a first portion of a document to obtain a first image until the optical module reaches a forward-boundary position; moving the optical module, in the forward direction, from the forward-boundary position to an end position and then stopping the optical module; moving the optical module, in a reverse direction which is reverse to the forward direction, from the end position to a reverse-internal position, and then enabling the optical module to scan a second portion of the document to obtain a second image until the optical module reaches a reverse-boundary position, wherein the forward-boundary position and the reverse-boundary position define a scan range of the document in the forward direction and the reverse direction, wherein the reverse-internal position and the forward-internal position are located between the forward-boundary position and the reverse-boundary position; moving the optical module from the reverse-boundary position in the reverse direction and then stopping the optical module; and stitching the first image and the second image into a complete image corresponding to the document.