CN204598111U - Image-scanning system - Google Patents
Image-scanning system Download PDFInfo
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- CN204598111U CN204598111U CN201520234775.5U CN201520234775U CN204598111U CN 204598111 U CN204598111 U CN 204598111U CN 201520234775 U CN201520234775 U CN 201520234775U CN 204598111 U CN204598111 U CN 204598111U
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Abstract
A kind of image-scanning system comprises a light source, an image acquisition unit, a correcting plate and a processing unit.Light source provides a light.Image acquisition unit, one image capture scope comprises one scan district and a correction zone, and an object relative movement to be scanned of itself and scanning area, with a correcting image of the one scan image and correction zone that capture scanning area.Correcting plate is relatively arranged on correction zone, in order to reflection ray.Processing unit, itself and image acquisition unit are electrically connected, and it is according to one first brightness value at the correcting image of each different scanning positions, compensate one second brightness value of corresponding scan-image, to produce a correct scan image, the scan-image defect produced because the illumination of light source makes a variation can be overcome.
Description
[technical field]
The utility model is relevant a kind of image-scanning system, particularly a kind of image-scanning system with compensated scanning image brilliance function.
[background technology]
Along with the image scan demand of high-res, operating time of image-scanning system by with increase.Example a kind of image-scanning system as is known, scans the time needed for a reflection original text with resolution 1600dpi, may be greater than 8 minutes.And the light source that general image-scanning system uses is easily because the operating time is long or mechanism's radiating effect is not good, makes light source overheated and produce illumination variation, causing the brightness of scan-image to make a variation.Generally speaking, image-scanning system can carry out light-source brightness correction when starting shooting, and to meet the object brightness needed for work, but but still feels simply helpless for the light-source brightness variation in above-mentioned scanning process.
In sum, a kind of image-scanning system with compensated scanning image brilliance function how is provided to be the target that current pole need be made great efforts.
[utility model content]
The utility model provides a kind of image-scanning system, it is that the correcting image utilizing a correcting plate to produce makes a variation with the illumination of immediately monitoring one light source, and one processing unit according at the brightness value of the correcting image of different scanning positions, the brightness value of its corresponding one scan image from an object to be scanned of instant compensation, to produce a correct scan image, jump in brightness problem before and after the scan-image that produces can be improved because the illumination of light source makes a variation.
A kind of image-scanning system of the utility model one embodiment comprises a light source, an image acquisition unit, a correcting plate and a processing unit.Light source provides a light.Image acquisition unit, it has an image capture scope and comprises one scan district and a correction zone, and an object relative movement to be scanned of itself and scanning area, with a correcting image of the one scan image and correction zone that capture scanning area.Correcting plate is arranged at correction zone, in order to reflection ray.Processing unit, itself and image acquisition unit are electrically connected, and it is according to one first brightness value at the correcting image of each different scanning positions, compensates one second brightness value of corresponding scan-image, to produce a correct scan image.
Graphicly to illustrate in detail, when the effect being easier to understand the purpose of this utility model, technology contents, feature and reach appended by coordinating by specific embodiment below.
[accompanying drawing explanation]
Fig. 1 is a schematic diagram, the image-scanning system of display the utility model one embodiment.
Fig. 2 is a schematic diagram, an image capture scope of another embodiment of display the utility model.
[symbol description]
10 light sources
20 correcting plates
30 image acquisition units
32 optical lenses
40 processing units
A is for scanned object
R image capture scope
R1 scanning area
R2 correction zone
[embodiment]
Please refer to Fig. 1, the image-scanning system of an embodiment of the present utility model comprises light source 10, image acquisition unit 30, correcting plate 20 and a processing unit 40.Light source 10 provides a light.In an embodiment, light source 10 is a light-emitting diode (LED) or a cold-cathode tube (CCFL), in order to provide the light needed for scanning.In an embodiment, light source 10, correcting plate 20, image acquisition unit 30 and processing unit 40 can be considered a bare engine module, with an object relative movement to be measured to capture scan-image.In another embodiment, light source 10 is the internal side of shells being fixedly installed on image-scanning system, irradiate a moveable optical reflection element, to provide light to an one image capture scope, it is characterized in that, optical reflection element, correcting plate 20, image acquisition unit 30 and processing unit 40 are integrated in a bare engine module, with an object relative movement to be measured to capture scan-image, but are not limited thereto.
Please refer to Fig. 2, image acquisition unit has an image capture scope R and comprises an one scan district R1 and correction zone R2.The one object A to be scanned relative movement of image acquisition unit and scanning area R1, with a correcting image of the one scan image and correction zone R2 that capture scanning area R1.In an embodiment, image acquisition unit is simultaneously or gradation acquisition scan-image and correcting image, but not as limit.Be understandable that, above-mentioned relative movement represents, image acquisition unit (or bare engine module) is moved by a driver element, to capture the scan-image of object A to be measured; Such as, or object A to be scanned is moved by a driver element, and image acquisition unit (or bare engine module) maintains static, a kind of sheet-fed image scanning system.
In an embodiment, image acquisition unit can be a charge coupled cell (CCD) or a contact-type image sensor (CIS).In another embodiment, image acquisition unit more comprises a multi-wavelength acquisition unit, and its acquisition corresponds to the scan-image of light different wavelength range, and corresponds to the correcting image of light different wavelength range.For example, the acquisition of multi-wavelength acquisition unit corresponds to scan-image and the correcting image of ruddiness, captures the scan-image corresponding to green glow, blue light and correcting image respectively simultaneously.
Continue referring to Fig. 1, correcting plate 20 is relatively arranged on correction zone R1, in order to reflection ray.In an embodiment, correcting plate 20 can be the correcting plate of a white material.In an embodiment, with object relative movement to be scanned while of correcting plate 20 and image acquisition unit 30, the meaning of relative movement as mentioned above, does not repeat them here.In another embodiment, correcting plate 20 is fixedly attached to corresponding to inside the internal side of shell of the image-scanning system of correction zone R2 or its upper cover, the light provided in order to reflection source 10.
Be understandable that the image capture scope of general image-scanning system has a transparent platform, an object to be scanned is put to after transparent platform by user, covers upper cover, to carry out image scan.Generally speaking, transparent platform can be the fixing sheet glass of a thickness, correcting sheet can be arranged in transparent platform and to have a difference in level with treating side scanned object inside one of image acquisition module, maybe fixedly can be attached to inside upper cover and have identical level height with object to be scanned.Should be noted, aforementioned two kinds of operational scenario, the distance of correcting plate and image acquisition unit and the distance of object to be scanned and image acquisition unit, perhaps have narrow difference, but also compensated by optical computing, and do not affected the brightness quality of scan-image technically.Therefore, as shown in Figure 1, correcting sheet 20 and object A to be scanned are plotted in same level height, are only illustrative purposes, still not as limit.
Continue above-mentioned explanation, and processing unit 40 and image acquisition unit 30 are electrically connected.Processing unit 40, according to one first brightness value of the correcting image at each different scanning positions, compensates one second brightness value of corresponding scan-image, to produce a correct scan image of object to be scanned.
Preferably, processing unit 40 more comprises a comparing unit, it calculates the difference between first brightness value and a target brightness value of the correcting image of each different scanning positions, and exports a compensating signal compensates corresponding scan-image one second brightness value for processing unit 40.For example, the correcting image captured at a mid point scanning position and one scan image receive the image that light source 10 formed in the light that the same time provides.Do not have illumination to make a variation ideally at light source 10, keep identical at the first brightness value of the correcting image of any point scanning position.But light source 10 illumination may decline because of heat fade, causes the gray value (Level) of correcting image and scan-image also along with reduction.Now, by the first brightness value of calculation correction image and the difference of target brightness value (target brightness value of initial calibration of such as starting shooting), a such as multiple proportion, comparing unit can provide a compensating signal to processing unit 40, take advantage of back this multiple to compensate the second brightness value of scan-image corresponding for mid point scanning position for processing unit 40, to produce the correct scan image of object to be scanned, jump in brightness problem before and after the scan-image that produces can be improved because the illumination of light source makes a variation.
Preferably, processing unit 40 more comprises a comparing unit, and it calculates the first brightness value difference of the correcting image between these different two scanning positions, and exports a compensating signal compensates corresponding scan-image one second brightness value for processing unit 40.For example, the correcting image captured at a mid point scanning position and one scan image receive the image that light source 10 formed in the light that the same time provides.Do not have illumination to make a variation ideally at light source 10, keep identical at the first brightness value of the correcting image of any point scanning position.But light source 10 may because heat fade and illumination decline, the gray value causing correcting image and scan-image also with reduction.Now, by the first brightness value difference of correcting image calculating mid point scanning position and last spot scan position, a such as multiple proportion, comparing unit can provide a compensating signal to processing unit 40, take advantage of back this multiple to compensate the second brightness value of scan-image corresponding for mid point scanning position for processing unit 40, to produce the correct scan image of object to be scanned, jump in brightness problem before and after the scan-image that produces can be improved because the illumination of light source makes a variation.
Comprehensively above-mentioned, device of image scanning of the present utility model, it is that the correcting image utilizing a correcting plate to produce makes a variation with the illumination of immediately monitoring one light source, and one processing unit according at the brightness value of the correcting image of different scanning positions, the brightness value of its corresponding one scan image from an object to be scanned of instant compensation, to produce a correct scan image, jump in brightness problem before and after the scan-image that produces can be improved because the illumination of light source makes a variation.
Above-described embodiment is only for technological thought of the present utility model and feature are described, its object understands content of the present utility model implementing according to this enabling the personage haveing the knack of this skill, when not limiting the scope of the claims of the present utility model with this, namely the equalization change that the spirit generally disclosed according to the utility model is done or modification, must be encompassed in the scope of the claims of the present utility model.
Claims (10)
1. an image-scanning system, is characterized in that, comprises:
One light source, it provides a light;
One image acquisition unit, it has an image capture scope and comprises one scan district and a correction zone, and an object relative movement to be scanned of itself and this scanning area, with a correcting image of the one scan image and this correction zone that capture this scanning area;
One correcting plate, it is arranged at this correction zone, in order to reflect this light; And
One processing unit, itself and this image acquisition unit is electrically connected, and it is according to one first brightness value at this correcting image of each different scanning positions, compensates one second brightness value of this corresponding scan-image, to produce a correct scan image.
2. image-scanning system as claimed in claim 1, it is characterized in that, this image acquisition unit captures this scan-image and this correcting image simultaneously.
3. image-scanning system as claimed in claim 1, it is characterized in that, this image acquisition unit comprises a multi-wavelength acquisition unit, its acquisition this scan-image of different wavelength range and this correcting image of different wavelength range.
4. image-scanning system as claimed in claim 1, it is characterized in that, this processing unit more comprises a comparing unit, it calculates the difference between this first brightness value and a target brightness value at this correcting image of this different each scanning positions, and exports a compensating signal compensates this corresponding scan-image according to this compensating signal this second brightness value for this processing unit.
5. image-scanning system as claimed in claim 1, it is characterized in that, this processing unit more comprises a comparing unit, it calculates this first brightness value difference of this correcting image between these different two scanning positions, and exports a compensating signal compensates this corresponding scan-image according to this compensating signal this second brightness value for this processing unit.
6. image-scanning system as claimed in claim 1, is characterized in that, more comprise a driver element, in order to drive this correcting plate and this image acquisition unit simultaneously with this object relative movement to be scanned.
7. image-scanning system as claimed in claim 1, it is characterized in that, this correcting plate is fixedly installed on this correction zone.
8. image-scanning system as claimed in claim 1, it is characterized in that, this correcting plate is a white material.
9. image-scanning system as claimed in claim 1, it is characterized in that, this light source comprises a light-emitting diode (LED) or a cold-cathode tube (CCFL).
10. image-scanning system as claimed in claim 1, it is characterized in that, this image acquisition unit comprises a charge coupled cell (CCD) or a contact-type image sensor (CIS).
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|---|---|---|---|
| CN201520234775.5U CN204598111U (en) | 2015-04-17 | 2015-04-17 | Image-scanning system |
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| CN201520234775.5U CN204598111U (en) | 2015-04-17 | 2015-04-17 | Image-scanning system |
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| CN204598111U true CN204598111U (en) | 2015-08-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106506898A (en) * | 2015-09-08 | 2017-03-15 | 全友电脑股份有限公司 | Image-scanning system and its method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106506898A (en) * | 2015-09-08 | 2017-03-15 | 全友电脑股份有限公司 | Image-scanning system and its method |
| CN106506898B (en) * | 2015-09-08 | 2019-07-30 | 全友电脑科技(吴江)有限公司 | Image-scanning system and its method |
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