Apparatus and method of detecting a scanning range when applying assistant frames for flatbed scanners
AssigneeMustek Systems Inc.
InventorsWayne Lee, Jenn-Tsair Tsai, Flyinga Liao
Life of this patent
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Abstract
The present invention discloses an apparatus and a method for detecting the scanning range when applying the assistant frames in the flatbed scanners. Fixed marks allocated at the front side of the assistant frames are used to determine the sizes of the assistant frames. The required scanning ranges are thus determined according to the recognized assistant frames obtained from pre-scan. Only the front sides but whole of the assistant frames need to be pre-scanned, and thus to reduce the scanning time interval.
Claims12
An assistant frame adaptable for a scanner for detecting a scanning range of a transparent document, comprising:
- a solid frame having at least one empty grid for placing said transparent document;
- and
- at least one fixed mark formed at the front end of said solid frame;
- wherein a total number of said at least one fixed mark and a distance between every two fixed marks determines the scanning range of said transparent document.
An apparatus adaptable for a scanner for detecting a scanning range of a transparent document, comprising:
- an assistant frame having a solid frame, at least one fixed mark formed on the front end of said solid frame for indicating the scanning range of said transparent document, and at least one empty grid for placing said transparent document;
- means for determining the scanning range of said transparent document by detecting a total number of said at least one fixed mark and a distance between every two fixed marks;
- and
- pre-scan means for reading an image information of said transparent document according to the scanning range of said transparent document determined by said determining means.
A method for detecting a scanning range of a transparent documents for a scanner, comprising the steps of:
- providing a plurality of assistant frames each having a predetermined size of empty grid for fitting a transparent document;
- marking the predetermined size of each of said plurality of assistant frames by forming through holes on the front end of each of said plurality of said assistant frames;
- placing said transparent document on said scanner with a selected assistant frame;
- performing a pre-scan procedure to read information of said through holes on the front end of said selected assistant frame;
- determining the scanning range of said transparent document by detecting a total number of said through holes and a distance between every two through holes;
- and
- scanning said transparent document according to said determined scanning range of said transparent document.
Dependencies are inferred from the claim text.