Image scanning method
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United States of America Patent
Stats
-
Aug 20, 2019
Grant Date -
Jul 11, 2019
app pub date -
Mar 18, 2019
filing date -
Mar 23, 2017
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An image scanning method applied in an image scanning device capable of scanning a card. Record background values at the time of a card being without being in a scanning channel, and the background values recorded at the time of the card being without being in the scanning channel are regarded as preset values. Before the card is scanned, check whether the background values in the scanning channel conform to the preset values. Drive the card to move a distance Y. Check whether the background values in the scanning channel conform to the preset values. Preset a preset movement distance, check whether a movement distance of the card or a distance of accumulated movements of the card exceeds the preset movement distance. Display that the card is stuck. Stop checking and proceeding with an image calibration. Start scanning the card. Complete scanning the card and withdraw the card.
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