CN1157929C - Scanner and scanning method for black level correction by using fixed shading device - Google Patents
Scanner and scanning method for black level correction by using fixed shading device Download PDFInfo
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- CN1157929C CN1157929C CNB011200960A CN01120096A CN1157929C CN 1157929 C CN1157929 C CN 1157929C CN B011200960 A CNB011200960 A CN B011200960A CN 01120096 A CN01120096 A CN 01120096A CN 1157929 C CN1157929 C CN 1157929C
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- shading device
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- position correction
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000000903 blocking effect Effects 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 230000007246 mechanism Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000001915 proofreading effect Effects 0.000 description 1
- NHDHVHZZCFYRSB-UHFFFAOYSA-N pyriproxyfen Chemical compound C=1C=CC=NC=1OC(C)COC(C=C1)=CC=C1OC1=CC=CC=C1 NHDHVHZZCFYRSB-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention provides a scanner and scanning method for black quasi-position correction by using fixed shading device, the scanner at least includes a shell; an actuating module for driving the image capturing module to enable the parallel movement; an image capturing module for capturing images and converting the images into digital signals; and a fixed shading device for shading the light traveling path to make the scanner perform black level correction; the scanning method is that the image picking module in the scanner has one set of actuating module, and the actuating module drives the image picking module to move parallelly to preset shading position to shield the fixed shading device from light path.
Description
Technical field
The invention provides a kind of scanner and scan method, refer to a kind of scanner and scan method of utilizing fixed light shading device to carry out dark quasi-position correction especially.
Background technology
General scanner perhaps before scanning document, can carry out white quasi-position correction (WhiteCalibration) and dark quasi-position correction (Black Calibration) when start.White quasi-position correction is in order to confirm the whitest image of the image capture module institute sensing in the scanner, change into digital signal after, be called white accurate position image signal; And dark quasi-position correction is in order to confirm the most black image of the image capture module institute sensing in the scanner, is called black accurate position image signal after changing into digital signal.This two image signal will be used for proofreading and correct the digital signal of the document image that is produced as the image capture module when the scanning document.
The general scanner of prior art, its dark quasi-position correction method utilization is covered Image Sensor in the image capture module and (is normally adopted charge coupled cell CCD, Charged-Coupled Device) the idle pixel at two ends (dummy Pixels), make it not be subjected to irradiate light, with the black image signal mean value of idle pixel output as a black accurate image signal.Because general linear Image Sensor output signal of each pixel (pixel) and inequality under the same time when the identical image signal of detecting; as Fig. 1; when detecting identical image signal; the output voltage values of the idle pixel in two ends can be low than the output voltage values of intermediate pixel usually; if so with the black image signal mean value of the idle pixel output at two ends as a black accurate image signal; its corrected value will have suitable error, and the document image color also will distortion.
Another kind of dark quasi-position correction method, be when scanner carries out dark quasi-position correction, the scanner light source is closed, so Image Sensor will not receive any light in the image capture module, each pixel in the Image Sensor all can obtain its corresponding black accurate position image signal at this moment, and has improved the shortcoming of said method; But because of the scanner light source must being closed, and when the user will be scanned, light source must be opened again, the warm-up period that needs tens of seconds usually just can scan, so method not hommization very.
For solving the shortcoming of said method, the scanner of prior art has another kind of dark quasi-position correction method, be in scanner, to have a kind of AUTOMATIC SUNSHADE, before carrying out its dark quasi-position correction, this AUTOMATIC SUNSHADE is covered the light course, do not allow light enter Image Sensor in the image capture module, this moment, Image Sensor carried out dark quasi-position correction, and made each pixel in the Image Sensor obtain its relative black accurate position image signal.Details are as follows for its method and apparatus:
Consult Fig. 2 and Fig. 3.Fig. 2 is the scanner with an AUTOMATIC SUNSHADE, the profile under not shading state; Fig. 3 is the scanner with an AUTOMATIC SUNSHADE, the profile under the shading state.This scanner comprises a housing 21 at least, and this housing 21 comprises a transparent window 26 at least, and this transparent window 26 is a transparency glass plate, in order to place a file 25 to be scanned; Consistent dynamic model group 22, be located in the housing, its two ends are individually fixed in the two inboard relatively of this housing 21, this actuating module 22 comprises an actuator 221 at least, this actuator can be a motor, is located at a side of this actuating module 22, in order to actuating force to be provided, one guide rod 222, its two ends are individually fixed in the two inboard relatively of this housing 21; One image capture module 23, be located on this actuating module 22, and can activate the driving of module 22 by this, parallel moving on this guide rod 222, in order to capturing the image of a file 25 to be scanned, and transfer a digital signal to, this image capture module 23 comprises a module casing 231 at least, one light source 232, in order to emission light, an Image Sensor 234 can be a charge coupled cell (CCD, Charged-Coupled Device), in order to receive image, change into digital signal, a plurality of reflectors 233, in order to change light course 235, the light of light emitted can be entered in this Image Sensor 234; One automatic chopping mechanism 24, be located in the image capture module 23, this automatic chopping mechanism 24 includes an anti-dazzling screen 242 at least, in order to blocking light course 235, a transmission mechanism 241, carry out the shading action in order to drive anti-dazzling screen, as gear, belt pulley etc., an actuator (not shown), in order to power to be provided, as motor etc.
When scanning document, state as shown in Figure 2, light course 235 is penetrated by a light source 232, after file 25 reflections to be scanned, produce an image, this image signal relends by after a plurality of reflector 233 reflections, directly enter in the Image Sensor 234, after this Image Sensor 234 captures this image, export after just converting a digital image data to, this image capture module 23 relends the driving by consistent dynamic model group 22, makes this image capture module 23 be parallel to file 25 to be scanned and moves, and just can reach the purpose of scanning document smoothly.
If this scanner is in firm start, or before the scan-image, when desiring to carry out dark quasi-position correction, state as shown in Figure 3, this moment the self-action chopping mechanism just drive transmission device 241 of brake (not shown), make anti-dazzling screen 242 move a hidden position, this time course 235 is penetrated by a light source 232, through file 25 reflections to be scanned, relend by after a plurality of reflector 233 reflections, the light that light source produces is covered by anti-dazzling screen 242, and can't arrive in the Image Sensor 234, owing to inject in a plurality of pixels of this Image Sensor 234 without any light, so this image that a plurality of pixel captured of this Image Sensor 234 is standard black, convert corresponding a plurality of digital signal to through this Image Sensor 234,, proofread and correct when scanning document is provided and use as a plurality of pixels other black accurate position image signal, after the dark quasi-position correction, scanner just can standby be prepared scanning.
The above-mentioned method of utilizing an AUTOMATIC SUNSHADE that the light course is covered, though light source must not closed, but owing to increased the element of an AUTOMATIC SUNSHADE, will improve manufacturing cost, and have and assemble not that easy-maintaining is difficult for and the shortcoming that increases failure rate or the like.
Summary of the invention
Main purpose of the present invention is to be to provide a kind of scanner and scan method of utilizing fixed light shading device to carry out dark quasi-position correction, utilize the image capture module in this scanner to activate module for existing one group, and the image capture module is moved to a default shading position, make suitably shield light course of its fixed light shading device, Image Sensor in the image capture module can carry out dark quasi-position correction whereby, carry out the shortcoming of the method for dark quasi-position correction to solve above-mentioned prior art with the idle pixel of covering the Image Sensor two ends, also do not have another prior art is closed need increase warm-up period when light source carries out dark quasi-position correction shortcoming simultaneously.
The scanner that utilizes fixed light shading device to carry out dark quasi-position correction of the present invention comprises at least:
One housing;
Consistent dynamic model group is located in this housing, and it is inboard relatively that its opposite end is individually fixed in this housing two;
One image capture module is located on this actuating module, and can activate the driving of module and parallel move by this, in order to capturing the image of a file to be scanned, and transfers a digital signal to;
One fixed light shading device is located at an inboard of this housing, in order to blocking light course;
This scanner utilizes moving of this image capture module, makes this fixed light shading device shield light course, is carried out dark quasi-position correction so that this image capture module to be provided.
The scan method of utilizing fixed light shading device to carry out dark quasi-position correction of the present invention can make this fixed light shading device shield light course, is carried out the dark quasi-position correction method so that an Image Sensor to be provided; Its step comprises at least:
(1) this image capture module is by the driving of consistent dynamic model group, move to a default shading position, make this fixed light shading device can cover the light course, so, the light of the light emitted in this image capture module can't arrive this Image Sensor in this image capture module;
(2) a plurality of pixels of this Image Sensor in this image capture module begin pick-up image;
(3) a plurality of pixels of this Image Sensor in this image capture module become digital signal to produce video conversion, are black accurate position image signal.
The present invention adopts fixed light shading device to come shield light conduct route, because structure must additionally not increase manufacturing cost than simple in the mode of employing AUTOMATIC SUNSHADE so have, and assembling easily, non-damageable again multiple advantages in the use.
Description of drawings
Fig. 1 is the location of pixels of charge coupled cell and the figure of output voltage;
Fig. 2 is the scanner that prior art has an AUTOMATIC SUNSHADE, the profile under not shading state;
Fig. 3 is the scanner that prior art has an AUTOMATIC SUNSHADE, the profile under the shading state;
Fig. 4 is the scanner with a fixed light shading device of the present invention, the profile under not shading state;
Fig. 5 is the scanner with a fixed light shading device of the present invention, the profile under the shading state;
Fig. 6 is the dark quasi-position correction flow chart with this fixed light shading device of scanner of a fixed light shading device of the present invention.
The diagrammatical symbol explanation:
21 housings
22 activate module
23 image capture modules
24 AUTOMATIC SUNSHADE
25 files to be scanned
26 transparent windows
221 actuators
222 guide rods
231 module casings
232 light sources
233 reflectors
234 Image Sensors
235 smooth courses
241 transmission mechanisms
242 anti-dazzling screens
41 housings
42 activate module
43 image capture modules
44 fixed light shading devices
45 files to be scanned
46 transparent windows
421 actuators
422 guide rods
431 module casings
432 light sources
433 reflectors
434 Image Sensors
435 smooth courses
441 anti-dazzling screens
442 breach
Embodiment
Below be described further at most preferred embodiment of the present invention.
Consult Fig. 4 and Fig. 5.Fig. 4 is the scanner with a fixed light shading device of the present invention, the profile under not shading state; Fig. 5 is the scanner with a fixed light shading device of the present invention, the profile under the shading state.This scanner comprises a housing 41 at least, and this housing 41 comprises a transparent window 46 at least, and this transparent window 46 is a transparency glass plate, in order to place a file 45 to be scanned; Consistent dynamic model group 42, be located in this housing, its two ends are individually fixed in the two inboard relatively of this housing 41, this actuating module 42 comprises an actuator 421 at least, this actuator can be a motor, is located at a side of this actuating module 42, in order to actuating force to be provided, one guide rod 422, its two ends are individually fixed in the two inboard relatively of this housing 41; One image capture module 43, be located on this actuating module 42, and can activate the driving of module 42 by this, parallel moving on this guide rod 422, in order to capture the image of a file 45 to be scanned, and transferring digital signal to, this image capture module 43 comprises a module casing 431, one light sources 432 at least, in order to emission light, one Image Sensor 434 in order to pick-up image, changes into digital signal, this Image Sensor 434 is a charge coupled cell (CCD Charged-Coupled Device), a plurality of reflectors 433 in order to change light course 435, can enter in this Image Sensor 434 light of these light source 432 emissions; An and fixed light shading device 44, be located at this housing 41 inboard one default shading positions, this fixed light shading device 44 includes an anti-dazzling screen 441 at least, for light tight material is made, be fixed in this housing 41 inboard one default shading positions, and be parallel to this image capture module 43 directions of motion, in order to cover the light of these light source 432 emissions; Above-mentioned image capture module more comprises a breach 442, be located on this module casing 431 of this image capture module 43, with this anti-dazzling screen 441 in line, be used for making this anti-dazzling screen 441 of this fixed light shading device 44 to pass through, this anti-dazzling screen 441 can interdict light course 435.
When scanner is desired scanning document, state as shown in Figure 4, light course 435 is penetrated by a light source 432, after by file 45 reflections to be scanned, produce an image, this image relends by after a plurality of reflector 433 reflections, directly enter in the Image Sensor 434, behind this image that this Image Sensor 434 captures, export after just converting a digital signal to, this scanner relends the driving by consistent dynamic model group 42, makes this image capture module 43 be parallel to this file 45 to be scanned and moves, and just can reach the purpose of scanning document smoothly.
If scanner when desiring to deceive single-bit correction, sees also Fig. 5 and Fig. 6 before firm start or scan-image.The actuating module 42 of this scanner can drive an image capture module 43, the parallel default shading position that moves to, as step 410, after making an anti-dazzling screen 441 pass a breach 442, stretch in this image capture module 43, this time course 435 is penetrated by a light source 432, after this light course 435 reflects via a plurality of reflectors 433, covered by this anti-dazzling screen 441, and can't arrive in the Image Sensor 434, at this moment, these Image Sensor 434 beginning pick-up images, as step 420, owing to inject in a plurality of pixels of this Image Sensor 434 without any light,, convert corresponding a plurality of digital signal to through this Image Sensor 434 so this image that a plurality of pixel captured of this Image Sensor 434 is standard black, as a plurality of pixels other black accurate position image signal, as step 430, when being provided, proofreaies and correct scanning document usefulness, after the dark quasi-position correction, scanner just can standby be prepared scanning, as step 440.
Scanner with a fixed light shading device of the present invention, owing to be the shield light course, make that a plurality of pixel-by-pixel basis can not receive under the situation of any light in the Image Sensor, carry out dark quasi-position correction, so with the idle pixel of covering the Image Sensor two ends carry out that the method for dark quasi-position correction comes accurately, do not have prior art is closed need increase warm-up period when light source carries out dark quasi-position correction shortcoming again; And adopt fixed light shading device to come shield light conduct route, because structure than simple in the mode of employing AUTOMATIC SUNSHADE, must additionally not increase manufacturing cost so have, and assembling is easily, non-damageable again multiple advantages in the use.
The above embodiment only is explanation technological thought of the present invention and characteristics, its purpose makes the personage who has the knack of this skill can understand content of the present invention and is implementing according to this, when not limiting claim of the present invention with it, promptly the equalization of doing according to disclosed spirit generally changes or modifies, and must be encompassed in the claim scope of the present invention.
Claims (12)
1, a kind of scanner that utilizes fixed light shading device to carry out dark quasi-position correction, it is characterized in that: this scanner comprises at least:
One housing;
Consistent dynamic model group is located in this housing, and it is inboard relatively that its opposite end is individually fixed in this housing two;
One image capture module is located on this actuating module, and can activate the driving of module and parallel move by this, in order to capturing the image of a file to be scanned, and transfers a digital signal to;
One fixed light shading device is located at an inboard of this housing, in order to blocking light course;
Above-mentioned fixed light shading device comprises an anti-dazzling screen at least, is fixed in housing inboard one default shading position, and is parallel to this image capture module direction of motion, in order to blocking light course;
Above-mentioned image capture module comprises a breach at least, be located on this module casing of this image capture module, with this anti-dazzling screen in line, be used for making this anti-dazzling screen of this fixed light shading device to pass through, this anti-dazzling screen can interdict the light course;
This scanner utilizes moving of this image capture module, makes this fixed light shading device shield light course, makes this image capture module be carried out dark quasi-position correction.
2, the scanner that utilizes fixed light shading device to carry out dark quasi-position correction as claimed in claim 1, it is characterized in that: above-mentioned housing comprises at least:
One transparent window is located at an end of this housing, is used for placing this file to be scanned, and this image capture module scanning usefulness is provided.
3, the scanner that utilizes fixed light shading device to carry out dark quasi-position correction as claimed in claim 2 is characterized in that: above-mentioned transparent window comprises a transparency glass plate at least.
4, the scanner that utilizes fixed light shading device to carry out dark quasi-position correction as claimed in claim 1 is characterized in that: above-mentioned actuating module comprises at least:
One actuator is located at a side of this actuating module, is used to provide its actuating force;
One guide rod is located in this housing, and it is inboard relatively that its two ends are individually fixed in this housing two, and being used to guide this image capture module can parallelly move.
5, the scanner that utilizes fixed light shading device to carry out dark quasi-position correction as claimed in claim 4 is characterized in that: above-mentioned actuator comprises a motor at least.
6, the scanner that utilizes fixed light shading device to carry out dark quasi-position correction as claimed in claim 1 is characterized in that: above-mentioned image capture module comprises at least:
One light source is in order to emission light;
One Image Sensor in order to capture the image of this file to be scanned, changes into this digital signal.
7, the scanner that utilizes fixed light shading device to carry out dark quasi-position correction as claimed in claim 6 is characterized in that: above-mentioned Image Sensor comprises a charge coupled cell at least.
8, the scanner that utilizes fixed light shading device to carry out dark quasi-position correction as claimed in claim 1 is characterized in that: above-mentioned image capture module comprises at least:
One module casing;
A plurality of reflectors are located at a plurality of predeterminated positions in this module casing, in order to change the light course, make the light of this light emitted can enter this Image Sensor.
9, the scanner that utilizes fixed light shading device to carry out dark quasi-position correction as claimed in claim 1 is characterized in that: above-mentioned anti-dazzling screen is that a light tight material is made.
10, a kind of scan method of utilizing fixed light shading device to carry out dark quasi-position correction is characterized in that: make this fixed light shading device shield light course, carried out the dark quasi-position correction method so that an Image Sensor to be provided; Its step comprises at least:
(1) this image capture module is by the driving of consistent dynamic model group, move to a default shading position, make this fixed light shading device can cover the light course, so, the light of the light emitted in this image capture module can't arrive this Image Sensor in this image capture module;
(2) a plurality of pixels of this Image Sensor in this image capture module begin pick-up image;
(3) a plurality of pixels of this Image Sensor in this image capture module become digital signal to produce video conversion, are black accurate position image signal.
11, the described scan method of utilizing fixed light shading device to carry out dark quasi-position correction of claim 10 is characterized in that: a plurality of pixel institute picked image of this Image Sensor of being carried in this dark quasi-position correction method is a standard black.
12, the described scan method of utilizing fixed light shading device to carry out dark quasi-position correction of claim 10, it is characterized in that: that is carried in this dark quasi-position correction method should preset the shading position, refer to of the driving of this image capture module, move to one and make and to use this fixed light shading device to cover the position of light course by this actuating module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011200960A CN1157929C (en) | 2001-08-13 | 2001-08-13 | Scanner and scanning method for black level correction by using fixed shading device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011200960A CN1157929C (en) | 2001-08-13 | 2001-08-13 | Scanner and scanning method for black level correction by using fixed shading device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1402527A CN1402527A (en) | 2003-03-12 |
| CN1157929C true CN1157929C (en) | 2004-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011200960A Expired - Fee Related CN1157929C (en) | 2001-08-13 | 2001-08-13 | Scanner and scanning method for black level correction by using fixed shading device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1157929C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102123228B (en) * | 2010-01-08 | 2013-01-16 | 虹光精密工业（苏州）有限公司 | Scanner with background assemblies |
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2001
- 2001-08-13 CN CNB011200960A patent/CN1157929C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1402527A (en) | 2003-03-12 |
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Owner name: YUDONG OPTICAL CO., LTD. Free format text: FORMER OWNER: HONGYOU SCIENCE AND TECHNOLOGY CO LTD Effective date: 20070112 |
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Granted publication date: 20040714 Termination date: 20130813 |