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US 6,611,292 B1Granted
Focus controlling method and system for an image capturing system
AssigneeMustek Systems Inc.
InventorsJenn-Tsair Tsai, Te-Chih Chang
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AssigneeMustek Systems Inc.
InventorsJenn-Tsair Tsai, Te-Chih Chang
Estimating the term…
The focus controlling system of the present invention can include a calibration paper, an image capturing device, an input interface, and a processing and controlling device. The image capturing device is employed for scanning the calibration paper. The image capturing device has a focus point adjusting mechanism. The input interface is utilized for receiving a location data of a scanning point. The processing and controlling device is responsive to the input interface and the image capturing device to control the focus point adjusting mechanism. The focus controlling method of the present invention includes the following steps. First, a scanning point is set or detected and a compensated magnification ratio for the scanning point is then calculated. A focus point of a image capturing device is adjusted and a calibration paper is scanned. The adjusting step and the scanning step are then repeated until a magnification ratio of the calibration paper is about the value of the compensated magnification ratio.
A focus controlling system of an image capturing system for scanning an original in a document wrapper on a document plate of the image capturing system, said focus controlling system comprising:
A focus controlling method for scanning an original in a document wrapper on a document plate of an image capturing system, said focus controlling method comprising:
Dependencies are inferred from the claim text.