Scanning device capable of conducting black calibration with fixed mask
AssigneeMustek Systems Inc.
InventorsBill Chen, Albert Lu, Jimmy Tsao
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Abstract
A scanning system capable of conducting black calibration with a fixed mask has a shell, a conveying module for driving an image capture module to a parallel movement, an image capture module for capturing image therefore transferred to digital signals, and a fixed mask for obstructing the light path in order to conduct the black calibration. The image capture module is driven by the conveying module and moved to a predetermined mask position. At the predetermined mask position, the mask may obstruct the light path. In this case, the scanning device is able to conduct the black calibration, provided a black calibration signal for adjustment purposes.
Claims14
A scanning device comprising:
- a shell;
- a driving module;
- an image capturing module, driven by said driving module for capturing an image of a document, further transforming said image to digital signal;
- and
- a fixed masking module, fixedly mounted inside the shell for obstructing a light path,
- wherein said image capturing module is moved by said driving module to a predetermined position where said fixed marking module is mounted, for obstructing said light path, thus black calibration is conducted.
A method for obstructing a light path by a fixed mask comprising the steps of:
- driving an image capturing module to a predetermined position where said fixed mask is mounted, for obstructing said light path into an image sensing element of said image capturing module;
- capturing said image by said image sensing element;
- and
- transforming said image to digital signals for completing black calibration.
Dependencies are inferred from the claim text.