| 摘要 |
A method of automatically identifying a scan region boundary, used for scanning a document under a non-unified background, includes: reading a reference linear scan data by a scanning device, the scanning device analyzing brightness values in each row of the reference linear scan data and determining a reference range value according to the brightness values in each row; and during scanning a document, the scanning device comparing brightness values of a linear scan data with the reference range value so as to determine the scan region boundary. The method confirms the scan boundary of a document and is not subjected to a backlight element or a document carrier. The method identifies the boundary of a document under a non-unified background, is applicable to scanning transparent and reflective documents and has strong resistance against environmental interference, not only simplifying the scanning device but also enhancing the automatic performance.
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