CN103581488B - Scanning means and method - Google Patents
Scanning means and method Download PDFInfo
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- CN103581488B CN103581488B CN201210250497.3A CN201210250497A CN103581488B CN 103581488 B CN103581488 B CN 103581488B CN 201210250497 A CN201210250497 A CN 201210250497A CN 103581488 B CN103581488 B CN 103581488B
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Abstract
Scanning means of the present invention comprises light source, image sensor and driver module.Light source irradiates object in order to produce light; Image sensor in order to along one scan direction sequentially in each scanning position of object with the first time for exposure and the second time for exposure sensing through object reflection or the light of transmission object, to form the first image and the second image, light source continues to light, image sensor reached for the first time for exposure in the time for exposure, export the data of the first image, and image sensor continues to be exposed on the time for exposure reached for the second time for exposure, export the data of the second image; Driver module moves relative to each other in order to drive image sensor and object, to make image sensor scanned object.Above-mentioned scanning means, can utilize single pass process, namely obtains the image of different exposure time more than two.So, can high dynamic-range image be obtained and not have the problem of image contraposition, and saving sweep time.Also disclose a kind of scan method simultaneously.
Description
Technical field
The present invention is relevant a kind of scanning means and method, particularly a kind of utilize single pass process can obtain the image of different exposure time more than two scanning means and method.
Background technology
Scanning technique universal, makes many images, contribution is able to preserve through digitized mode.But in image draft, zones of different has different optical density (OD)s, draft dark space cannot obtain good digitized video with identical sweep parameter with draft clear zone simultaneously.
For example, wish to get the good image detail of dark space, the longer time for exposure must be set, enable image sensor fully sense light in dark space, and for clear zone, then may obtain the brilliant white image of an overexposure; Otherwise, for obtaining clear zone image clearly, then must set the shorter time for exposure, making image sensor be unlikely to excessively to sense clear zone light, and for dark space, then may present a slice dark.In order to obtain the image of a better quality, developed high dynamic range scanning technique, it utilizes Multiple-Scan to obtain the digitized video of different exposure parameter, then carry out image processing as repeatedly schemed etc., to obtain the sharp image in clear zone and dark space simultaneously.But this method needs Multiple-Scan, after sensor obtains first time exposed image, need to return initial position and zero-in, to scan to obtain second time exposed image next time, therefore quite lose time; And due to re-starting of scanning process, the problem of image contraposition skew may be produced.
In view of this, how efficient and to obtain scan-image be accurately the target needing effort at present badly.
Summary of the invention
The invention provides a kind of scanning means and method, its can along one scan direction sequentially in each scanning position of object with one first time for exposure and one second time for exposure sensing through object reflection or the light of transmission object, to form one first image and one second image.So, single pass process is utilized can to obtain the image of different exposure time more than two.
The scanning means of one embodiment of the invention comprises a light source, an image sensor and a driver module.Light source irradiates an object in order to produce a light; Image sensor in order to along one scan direction sequentially in each scanning position of object with one first time for exposure and one second time for exposure sensing through object reflection or the light of transmission object, to form one first image and one second image, wherein light source continues to light, image sensor reached for the first time for exposure in a time for exposure, export the data of the first image, and image sensor continues to be exposed on the time for exposure reached for the second time for exposure, then export the data of the second image; Driver module moves relative to each other in order to drive image sensor and object, to make image sensor scanned object.
The scan method of another embodiment of the present invention comprises provides a light source, irradiates an object in order to produce a light; And drive an image sensor and object to move relative to each other with a driver module, with make image sensor along one scan direction sequentially in each scanning position of object with one first time for exposure and one second time for exposure sensing through object reflection or the light of transmission object, to form one first image and one second image, wherein light source continues to light, image sensor reached for the first time for exposure in a time for exposure, export the data of the first image, and image sensor continues to be exposed on the time for exposure reached for the second time for exposure, then export the data of the second image.
Graphicly to illustrate in detail, when the effect being easier to understand object of the present invention, technology contents, feature and reach appended by coordinating below by way of specific embodiment.
Accompanying drawing explanation
Fig. 1 is the scanning means schematic diagram of one embodiment of the invention.
Fig. 2 is the scan method flow chart of another embodiment of the present invention.
Fig. 3 is the scanning pattern schematic diagram of one embodiment of the invention.
Drawing reference numeral:
1 scanning means
2 light sources
3 image sensor
4 driver modules
5 lens
6 user's interfaces
7 image processing modules
A sweep region
D scanning direction
L
1first scan line
L
2second scan line
S1 ~ S3 scan method
P
0initial position
Embodiment
Please refer to Fig. 1, the scanning means 1 of one embodiment of the invention comprises light source 2, image sensor 3 and a driver module 4.Light source 2 irradiates an object in order to produce a light, and for example, light source 2 can be a light-emitting diode or cold cathode fluorescent lamp (coldcathodefluorescentlamp, CCFL).Image sensor 3 in order to along one scan direction sequentially in each scanning position of object with one first time for exposure and one second time for exposure sensing through object reflection or the light of transmission object, to form one first image and one second image.In an embodiment, image sensor 3 can be a charge coupled cell (CCD), CMOS (Complementary Metal Oxide Semiconductor) (CMOS) sensor or contact-type image sensing device (CIS).Preferably, scanning means 1 more comprises an optical lens 5, and it is arranged at the incident side of image sensor 3, and in order to assemble through object reflection or the light of transmission object in image sensor, wherein optical lens 5 can be a rod lens (rodlens).Driver module 4 moves relative to each other in order to drive image sensor 3 and object, to make image sensor 3 scanned object.For example, driver module 4 can comprise a stepper motor, moves relative to object to order about sensor 3.
In an embodiment, scanning means 1 more comprises user's interface 6, and it is electrically connected image sensor 3.User can pass through this user's interface 6 and sets the first time for exposure and the second time for exposure, or setting scanning resolution, to obtain the first image and second image of different resolution.For example, user's interface 6 can be a key-press module, touch-control module or even acoustic control module, and it is positioned at scanning means 1 body or extends outside; Or through computer software to set sweep parameter.
Accept aforementioned, scanning means 1 more comprises an image processing module 7, and itself and image sensor 3 are electrically connected, in order to carry out image processing to the first image and the second image.After image sensor 3 obtains the first image and the second image, image processing module 7 can be sent to.Image processing module 7 can according to user's demand adjustment image character, repeatedly figure, Image Segmentation and merging etc.Will be understood that, image processing module comprises software, firmware or its combination.
For example, in an embodiment, when user is for scanning one object, according to its considering object optical density (OD), the user's interface 6 first through scanning means 1 inputs the first time for exposure 1ms and the second time for exposure 10ms.Fig. 3 is the scanning pattern schematic diagram of one embodiment of the invention, and as shown in Figure 3, when scanning means 1 starts to scan, image sensor 3 can from initial position P
0move along scanning direction D, successively by one first scan line L
1, one second scan line L
2by that analogy, until by whole scanning area A, just initial position P can be returned
0.According to the time for exposure set by user, when image sensor 3 is by the first scan line L
1time, first can stop the first time for exposure 1ms, to obtain the first scan line L
1the first image, then stop the second time for exposure 10ms, to obtain the first scan line L
1the second image, therefore the sweep time of the first scan line is the sum total 11ms of the first time for exposure 1ms and the second time for exposure 10ms, and then, image sensor 3 can move to the second scan line L
2, subsequent process by that analogy sequentially.In an embodiment, image sensor 3 also when the time for exposure reaches the first time for exposure 1ms, namely can export data and continues exposure, and when reaching the second time for exposure 10ms, exporting data again, so can shorten the time of scanning.
Hold, work as the end of scan, after complete first image that image sensor 3 obtains object and the second image, can be sent to image processing module 7, in an embodiment, image processing module 7 comprises a computer software, it is installed on a computer, and computer and scanning means 1 are electrically connected.Assisting through computer software, user can process the first image and the second image, such as, by the image of high time for exposure and the image of low time for exposure repeatedly figure, to obtain a high dynamic-range image.Will be understood that, image processing module 7 also can be located immediately on scanning means 1, with person easy to use operation immediately.
Please also refer to Fig. 1, Fig. 2 and Fig. 3, it illustrates the scan method of one embodiment of the invention.First, provide a light source 2, irradiate an object (S1) in order to produce a light; An image sensor 3 and object is driven to move relative to each other with a driver module 4, sequentially the light (S2) through object reflection or transmission object is sensed, to form one first image and one second image in each scanning position of object with one first time for exposure and one second time for exposure along one scan direction D to make image sensor 3.Therefore, after image sensor 3 obtains the first image, do not need to return initial position P
0zero-in, can sense to obtain the second image in same position once again.Finally, again an image processing (S3) is carried out to the first image and the second image, for example, through an image processing module 7, user can carry out the adjustment of image character, repeatedly figure, segmentation to the high time for exposure image of same object and low time for exposure image or merge, but be not limited thereto, to obtain good image.
In an embodiment, user more can pass through user's interface 6 and sets the first time for exposure and the second time for exposure, and wherein user's interface 6 can be a key-press module, touch-control module or even acoustic control module, and it is positioned at scanning means 1 body or extends outside; Or through a computer software to set sweep parameter.The detailed description of above-mentioned steps as previously mentioned, in this no longer superfluous words.Preferably, in an embodiment, user can according to the different time for exposure, and set the output resolution that it is wanted, therefore the resolution of the first image and the second image can be difference.
Comprehensively above-mentioned, scanning means of the present invention and method provide a sensor, its can along one scan direction sequentially in each scanning position of object with one first time for exposure and one second time for exposure sensing through object reflection or the light of transmission object, to form one first image and one second image.So, utilize single pass process can obtain the image of different exposure time more than two, then through image processing, a dark space and clear zone image all clearly can be obtained simultaneously.Except saving sweep time, it also avoid the problem of image contraposition skew.
Above-described embodiment is only for technological thought of the present invention and feature are described, its object understands content of the present invention implementing according to this enabling the personage haveing the knack of this skill, when can not with restriction the scope of the claims of the present invention, namely the equalization generally done according to disclosed spirit changes or modifies, and must be encompassed in the scope of the claims of the present invention.
Claims (19)
1. a scanning means, is characterized in that, described scanning means comprises:
One light source, it irradiates an object in order to produce a light;
One image sensor, it is in order to sequentially to sense the described light through object described in described object reflection or transmission in each scanning position of described object with one first time for exposure and one second time for exposure along one scan direction, to form one first image and one second image, wherein said light source continues to light, described image sensor reaches described first time for exposure in a time for exposure, export the data of described first image, and described image sensor continues to be exposed on the described time for exposure reaches described second time for exposure, then export the data of described second image; And
One driver module, it moves relative to each other in order to drive described image sensor and described object, scans described object to make described image sensor.
2. scanning means as claimed in claim 1, it is characterized in that, described light source comprises a light-emitting diode or cold cathode fluorescent lamp.
3. scanning means as claimed in claim 1, it is characterized in that, described scanning means more comprises:
One optical lens, it is arranged at the incident side of described image sensor, in order to assemble described light through object described in the reflection of described object or transmission in described image sensor.
4. scanning means as claimed in claim 3, it is characterized in that, described optical lens comprises a rod lens.
5. scanning means as claimed in claim 1, it is characterized in that, described scanning means more comprises:
One image processing module, itself and described image sensor are electrically connected, in order to carry out image processing to described first image and described second image.
6. scanning means as claimed in claim 1, it is characterized in that, described scanning means more comprises:
One user's interface, it is electrically connected described image sensor, with a user through the first time for exposure described in described user's interface setting and described second time for exposure.
7. scanning means as claimed in claim 1, it is characterized in that, described driver module comprises a stepper motor.
8. scanning means as claimed in claim 1, it is characterized in that, described image sensor comprises a charge coupled cell, CMOS (Complementary Metal Oxide Semiconductor) sensor or contact-type image sensing device.
9. scanning means as claimed in claim 1, is characterized in that, the resolution of described first image and described second image is different.
10. a scan method, is characterized in that, described scan method comprises:
One light source is provided, irradiates an object in order to produce a light; And
An image sensor and described object is driven to move relative to each other with a driver module, sequentially the described light through object described in described object reflection or transmission is sensed in each scanning position of described object with one first time for exposure and one second time for exposure along one scan direction to make described image sensor, to form one first image and one second image, wherein said light source continues to light, described image sensor reaches described first time for exposure in a time for exposure, export the data of described first image, and described image sensor continues to be exposed on the described time for exposure reaches described second time for exposure, export the data of described second image again.
11. scan methods as claimed in claim 10, it is characterized in that, described light source comprises a light-emitting diode or cold cathode fluorescent lamp.
12. scan methods as claimed in claim 10, is characterized in that, described scan method more comprises assembles described light through object described in the reflection of described object or transmission in described image sensor with an optical lens.
13. scan methods as claimed in claim 12, it is characterized in that, described optical lens comprises a rod lens.
14. scan methods as claimed in claim 10, it is characterized in that, described scan method more comprises:
One image processing is carried out to described first image and described second image.
15. scan methods as claimed in claim 14, is characterized in that, described image processing comprises adjustment image character, repeatedly figure, segmentation and merges.
16. scan methods as claimed in claim 10, is characterized in that, described scan method more comprised through the first time for exposure described in user's interface setting and described second time for exposure.
17. scan methods as claimed in claim 10, it is characterized in that, described driver module comprises a stepper motor.
18. scan methods as claimed in claim 10, it is characterized in that, described image sensor comprises a charge coupled cell, CMOS (Complementary Metal Oxide Semiconductor) sensor or contact-type image sensing device.
19. scan methods as claimed in claim 10, is characterized in that, the resolution of described first image and described second image is different.
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| CN201210250497.3A CN103581488B (en) | 2012-07-19 | 2012-07-19 | Scanning means and method |
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| CN201210250497.3A CN103581488B (en) | 2012-07-19 | 2012-07-19 | Scanning means and method |
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| CN103581488A CN103581488A (en) | 2014-02-12 |
| CN103581488B true CN103581488B (en) | 2016-04-20 |
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| US4956547A (en) * | 1988-09-28 | 1990-09-11 | Eastman Kodak Company | Apparatus for sensing information on both sides of documents |
| CN101035183A (en) * | 2006-03-07 | 2007-09-12 | 全友电脑股份有限公司 | Scanner with dual-charge coupling component array and its scanning method |
| CN101098411A (en) * | 2006-06-09 | 2008-01-02 | 三星电子株式会社 | Image processing apparatus and method for contrast enhancement |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4304542B2 (en) * | 2007-07-02 | 2009-07-29 | ソニー株式会社 | Camera system and automatic exposure control method |
| CN102263876A (en) * | 2010-05-31 | 2011-11-30 | 西门子公司 | Film digitalizing system and method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4956547A (en) * | 1988-09-28 | 1990-09-11 | Eastman Kodak Company | Apparatus for sensing information on both sides of documents |
| CN101035183A (en) * | 2006-03-07 | 2007-09-12 | 全友电脑股份有限公司 | Scanner with dual-charge coupling component array and its scanning method |
| CN101098411A (en) * | 2006-06-09 | 2008-01-02 | 三星电子株式会社 | Image processing apparatus and method for contrast enhancement |
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Effective date of registration: 20170509 Address after: No. 1669 road in Jiangsu city of Suzhou province Yundong Wujiang economic and Technological Development Zone Patentee after: All friend computer technology (Wujiang) Co., Ltd. Address before: Hsinchu Science Park, Taiwan, China Patentee before: Quanyou Computer Stock-sharing Co., Ltd. |