Image scanning method for increasing resolution of a document image
AssigneeAvision Inc.
InventorChin-Yuan Lin
Life of this patent
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Abstract
An image scanning method used in a scanner. The scanner includes a housing, a transparent platform set on the housing for a document to be placed on, a scanning module installed inside the housing for scanning the document, and a step motor for driving the scanning module step by step so as to scan the document. After completing a first scanning pass, the scanning module moves a predetermined distance, which corresponds to non-integer steps of the step motor so that when the scanning module performs a second scanning pass, sampling positions of the second scanning pass are different from sampling positions of the first scanning pass.
Claims6
An image scanning method used in a scanner, the scanner comprising:
- a housing;
- a transparent platform set on the housing for a document to be placed on;
- a scanning module installed inside the housing for scanning the document;
- and
- a driving device for driving the scanning module step by step so as to scan the document;
- the scanning method comprising:
- after completing a first scanning pass, the scanning module will move a predetermined space which corresponds to non-integer steps of the driving device so that when the scanning module performs a second scanning pass, sampling positions of the second scanning pass will be different from that of the first scanning pass.
Dependencies are inferred from the claim text.