Scanned image calibration device and method thereof for adjusting a scan frequency
a scanning image and calibration device technology, applied in the field of scanning image calibration devices, can solve the problems of increasing the cost of mounting an additional actuator, the apt failure of the roller constructed of two or more kinds of materials, etc., and achieve the effect of convenient production and maintenan
Inactive Publication Date: 2015-04-23
FOXLINK IMAGE TECH
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
[0009]An objective of this invention is to provide an image calibrating device for a document scanner which is easy to be maintain and to be produced.
[0013]In summary, the device in this invention calibrates scanned image by adjusting the scan frequency according to the transmitting state and the velocity changes of the document. Therefore, there is no need for the image calibrating device in this invention to use any additional actuator and components, so it will not failure due to mechanical wear. Thus the image calibrating device in this invention is easy to be produced and maintain.
Problems solved by technology
However, the roller constructed by two or more kinds of material is apt to fail to work when the softer part wears out, on the other hand, mounting an additional actuator will increase the product cost.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0022]Referring to FIG. 4, it is known that the document will accelerate when the following end of a document leaves the transmitting roller, and thus make the scanned image shorter than the original image that printed on the document. In order to solve said problem, the scanned image calibrating device in this invention includes: a scanning unit 30 that arranged in the transmitting path 21 for scanning and transferring image and texts on the origin into electrical signals. A transmitting device 20 that includes at least a first transmitting roller 22 and a second transmitting roller 23, wherein the first transmitting roller 22 is arranged upstream to the scanning unit 30, the second transmitting roller 23 is arranged downstream to the scanning unit 30, there is no other transmitting roller settled between the first and second transmitting roller 22, 23, the second transmitting roller 23 rotates faster than the first transmitting roller 22, and the distance there between is shorter ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
A device for calibrating scanned image includes a scanning unit arranged in a paper transmitting path for capturing texts and images on a document and transferring into electrical signals, a set of transmitting device which includes at least a first transmitting roller arranged upstream to the scanning unit, and a second transmitting roller arranged downstream to the scanning unit. There is no other transmitting roller arranged between the first and the second transmitting rollers, the distance between the first and the second transmitting rollers is shorter than the length of the document, and the second transmitting roller is faster than the first transmitting roller. A paper sensor is arranged in the paper transmitting path for detecting the position and the velocity of the document, and a control unit is connected with the paper sensor and the scanning unit to adjust the scan frequency in response to the position and the velocity of the document.
Description
BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a device for calibrating scanned image and a method thereof, especially to the device and method calibrating image by digital control.[0003]2. The Related Art[0004]Referring to FIG. 1, a common automatic document feeder uses a plurality of rollers 22′, 23′ to transmit documents from an input tray to a scanning device 30′ for capturing the images and texts printed on a document. In order to keep the document flat, the roller 23′ arranged downstream rolles faster than the roller 22′ arranged upstream. By using the velocity difference of the upstream and downstream rollers 22′, 23′ to pull and flatten the document.[0005]Referring to FIG. 2, when the document 10 pass through the scanning device 30′, the scanning device 30′ will capture a stripe of image from the surface of the document. In order to describe more easily, said stripe of image will be defined as scan lines 60 below. Because the...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & AuthorityApplications(United States)
IPC IPC(8): H04N1/00
CPCH04N1/00087H04N1/00063H04N1/00037H04N1/00031H04N2201/0458H04N1/00602H04N2201/0001H04N2201/0063H04N2201/0081H04N1/00018H04N1/4078H04N1/00819H04N1/00002H04N1/6055
InventorSUNG, CHANG HSIENCHOU, PIN KUANWANG, TE YI
OwnerFOXLINK IMAGE TECH