| 摘要 |
A scanner including a casing, a scanning platform, a scanning module and a positioning plate is provided. The scanning platform is embedded in the casing and exposes a surface to carry a to-be-scanned document. The scanning module is disposed under the scanning platform. The positioning plate disposed on an inner wall of the casing is adjacent to a top side of the scanning platform. The scanning module is for capturing images of the positioning plate and the inner wall and for identifying the image corresponding to one x-axis side of the positioning plate. The scanner defines a scanning start line according to the image corresponding to the x-axis side. The scanning module is moved from the scanning start line along a y-axis direction and captures an image of the to-be-scanned document. The x-axis side and the scanning start line are perpendicular to the y-axis direction perpendicular to the top side.
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