CN106791259A - Large format scanner and scan method - Google Patents
Large format scanner and scan method Download PDFInfo
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- CN106791259A CN106791259A CN201710081018.2A CN201710081018A CN106791259A CN 106791259 A CN106791259 A CN 106791259A CN 201710081018 A CN201710081018 A CN 201710081018A CN 106791259 A CN106791259 A CN 106791259A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/024—Details of scanning heads ; Means for illuminating the original
- H04N1/028—Details of scanning heads ; Means for illuminating the original for picture information pick-up
- H04N1/03—Details of scanning heads ; Means for illuminating the original for picture information pick-up with photodetectors arranged in a substantially linear array
- H04N1/031—Details of scanning heads ; Means for illuminating the original for picture information pick-up with photodetectors arranged in a substantially linear array the photodetectors having a one-to-one and optically positive correspondence with the scanned picture elements, e.g. linear contact sensors
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
- H04N1/047—Detection, control or error compensation of scanning velocity or position
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- Facsimile Scanning Arrangements (AREA)
Abstract
The present invention discloses a kind of large format scanner, including probe (3), transmission mechanism (4)；Imageing sensor (2) is installed, probe (3) couples with transmission mechanism (4) in probe (3)；Probe (3) is moved under the drive of transmission mechanism (4)；Probe (3) is mobile relative to original copy (1) with Y-direction both direction in X direction respectively and carries out the image scanning of sectional to original copy (1) by imageing sensor (2) in moving process.After technical scheme using combined type fractional scanning, the sweep amplitude of imageing sensor is substantially unrelated with the breadth size of original copy, can flexibly scan the original copy of various breadths, is particularly suited for the Manuscript scanner of special super large breadth；Overcome imageing sensor in the prior art scanning find a view width must corresponding supporting restrictive condition with the breadth of original copy.
Description
Technical field
The present invention relates to a kind of large format scanner, and in particular to using the technical scheme of combined type fractional scanning, reduce
The manufacturing cost of large format scanner, lifts the quality of scanning and range of application of large format scanner, belongs to large format scanner
The technical field that manufacture and scan image splice and process.
Background technology
The scan mode that existing large format scanner is used be to the mentality of designing of middle-size and small-size scanner it is similar, i.e.,
Probe comprising imageing sensor is set in X direction, and probe is moved relative to original copy along Y-direction, by image sensing
Device gathers manuscript image data successively, and is spliced to form complete original image.As platform-type/flatbed scanner uses original copy
The pattern of fixed movable scan head, paper feeding scanner fix the pattern of mobile original copy using probe.
For paper feeding scanner, it is scanned in original copy moving process, because the material and quality of original copy are poor
Different, original copy translational speed produces irregular fluctuation sometimes, and then influences scanning accuracy, and this velocity perturbation influence
It is difficult to be corrected, it is common practice that evaded by improving the accuracy of paper feed mechanism.
In fact, large format scanner is distinguished with middle-size and small-size scanner in the presence of some, mainly include：
1st, transmission mechanism：By taking platform-type/flatbed scanner as an example, large format scanner can use high-precision transmission mechanism
（Such as high-precision screw mandrel and stepper motor）, mechanical movement error scanning accuracy is influenceed to weaken, and middle-size and small-size scanner is received
Cost limitation it is difficult with high-precision transmission mechanism；And for the large format scanner of paper feed type, due to the expansion of breadth, feedback
The accuracy of mechanism of paper is also influenceed by some；
2nd, imageing sensor：Large format scanner generally uses multiple images sensor synchronous acquisition view data arranged side by side（Such as CIS
Contact-type image sensor）, then the splicing that the view data of multiple images sensor collection is carried out by the overlapping region scanned；
Also have what is be acquired using single image sensor（Such as high-precision CCD or cmos image sensor）, now imageing sensor
It is relatively costly and need it is supporting use high-precision camera lens, need to use larger space or adopt during design optical circuit
With complex light channel structure, advantage is the reduction of that image mosaic process, picture quality are high, the larger, cost that has the disadvantage volume
It is high；And middle-size and small-size scanner is most of all using monomer imageing sensor drainage pattern, technology maturation, reliable and stable；
3rd, sweep speed：The data volume that the imageing sensor of large format scanner is produced is big, and the bottleneck of sweep speed is essentially consisted in
The hardware configuration and treatment effeciency of supporting image data processing system；For middle-size and small-size scanner, the bottleneck master of sweep speed
It is the speed and precision of transmission mechanism motion；
4th, manufacturing cost：Breadth for different application original copys is different, and is directed to fixed width existing scanner more
Face is designed exploitation, the usage amount of large format scanner is smaller and specification is more therefore compatible and autgmentability is all poor, into
This height, and middle-size and small-size scanner uniform specification, the imageing sensor that is used and the scanning headstock have formed complete product line, into
This is low.
As can be seen here, if the mentality of designing for continuing to use middle-size and small-size scanner go design large format scanner, using effect and
Cost is difficult to take into account.
Reference paper：
1st, Chinese patent：Utility model, application number 01278852.X, " flat plate type CCD scanner head support light path structure "；
2nd, Chinese patent：Patent of invention, application number 201280028881.7, " paper feeding scanner and flatbed scanner system
System "；
3rd, Chinese patent：Patent of invention, application number 201280019866.6 " utilizes the large format scanning system of joining method
Scan method "；
4th, Chinese patent：Patent of invention, application number 201510390980.5, a kind of " modular broad width scanning IMAQ system
System and implementation method "；
5th, Chinese patent：Patent of invention, application number 201010157891.3, " large format of scanning information bracket assembly movement is swept
Retouch instrument and its scan method ".
The content of the invention
To solve the technical problem of the above, the present invention uses the technical scheme of combined type fractional scanning, i.e., scanning motion is by X
Direction and Y-direction both direction are combined；Including probe, transmission mechanism；Imageing sensor is installed in probe,
Probe couples with transmission mechanism, probe is moved under the drive of transmission mechanism；Probe respectively in X direction with Y side
Moved relative to original copy to both direction and the image that original copy carries out sectional is swept by imageing sensor in moving process
Retouch；
Wherein, imageing sensor and the scanning light structures and optical imagery supporting with imageing sensor are included in probe
Structure；Its structure type is varied, can be similar with the scanner headstock in reference 1；Wherein, imageing sensor 2 is excellent
First use CCD line style imageing sensors, it would however also be possible to employ CIS line styles contact-type image sensor or area image sensor
（Such as reference paper 5）.
Concrete structure is divided into two kinds：
First, platform-type/flatbed scanner：Including probe, transmission mechanism, panorama viewfinder window；In transmission mechanism
Including for realizing the X-axis travel mechanism of sectional scanning motion and the Y-axis moving machine for realization scanning section motion switch
Structure, transmission mechanism drives probe to be moved back and forth with Y-direction both direction in X direction respectively, and the image in probe is passed
The motion scan scope of sensor covers the viewfinder range of panorama viewfinder window；
Second, paper feeding scanner：Taken including probe, the transmission mechanism for realizing sectional scanning motion, section
Scape window, the paper feed mechanism for realizing movement original copy during scanning section switching；Transmission mechanism includes X-axis travel mechanism, passes
Motivation structure drives probe to be moved back and forth in X direction, the motion scan scope area of coverage of the imageing sensor in probe
The viewfinder range of section viewfinder window；Start paper feed mechanism between each section of scanning and realize cutting for scanning section along Y-direction movement original copy
Change.
The scan method of large format scanner of the invention is：In scanning process, the scanning of image taking sensor is found a view width
Original copy is divided into multiple scanning sections along Y-direction on the basis of degree carries out fractional scanning：
First, probe is aligned the first paragraph section to be scanned of original copy, drives probe to move right in X direction by transmission mechanism
The first paragraph section to be scanned of original copy carries out image scanning；
After the completion of the scanning of the first paragraph of original copy section to be scanned, by transmission mechanism drive probe along Y-direction move or
Original copy 1 is moved along Y-direction so that probe is directed at the second segment section to be scanned of original copy by paper feed mechanism；
Drive probe to move in X direction by transmission mechanism again carries out image scanning to the second segment region to be scanned of original copy；
Then, scanning of the circulation up to completion to view picture original copy according to this；
Wherein：
For platform-type/flatbed scanner：Original copy is positioned in panorama viewfinder window, probe is moved back and forth in X direction
Fractional scanning original image, drives probe to be moved along Y-direction between every section of scanning by transmission mechanism so that under probe alignment
One section to be scanned and then it is scanned again；And circulation completes scanning process successively；
For paper feeding scanner：The first paragraph of original copy 1 section to be scanned is transported into section along Y-direction by paper feed mechanism to find a view
The correspondence position of window simultaneously suspends conveying；The original image of probe motion scan first paragraph section to be scanned in X direction, every section
Continue conveying original copy along Y-direction by paper feed mechanism between scanning, next section to be scanned is transported to section viewfinder window
Correspondence position simultaneously suspends conveying and then is scanned again；Circulation successively completes scanning process, by paper feed mechanism is sent original copy again
Go out.
Under normal circumstances, X-direction and Y-direction keep and original copy for orthogonal and probe during scanning motion
Plane is moved in parallel.But also it is not excluded in particular cases, using unconventional scanning angle or scanning motion pattern, for example, taking
Scape window surface is flexure plane, broken line face etc.；But only need to ensure the motion scan scope covering of imageing sensor in probe
The viewfinder range of viewfinder window.
The beneficial effects of the invention are as follows：
1st, after using the technical scheme of combined type fractional scanning, the sweep amplitude of imageing sensor is basic with the breadth size of original copy
It is unrelated, the original copy of various breadths can be flexibly scanned, it is particularly suited for the Manuscript scanner of special super large breadth；Overcome existing skill
In art the scanning of imageing sensor find a view width must corresponding supporting restrictive condition with the breadth of original copy；
2nd, can be using conventional middle-size and small-size imageing sensor and the scanning headstock, yield is high, low cost；
3rd, for platform-type/flatbed scanner, it is to avoid significantly Surface scan time line structure design difficulty big problem；
4th, for paper feeding scanner, it is inactive state that technical scheme is designed as the original copy in fractional scanning, it is to avoid
Because the problem of original copy movement velocity influence of fluctuations scanning accuracy.
Brief description of the drawings
Accompanying drawing 1：The top view of flatbed scanner structure chart；
Accompanying drawing 2：The A-A of flatbed scanner structure chart is to sectional view；
Accompanying drawing 3：The perspective view of paper feeding scanner structure；
Accompanying drawing 4：The B-B direction sectional view of the perspective view of paper feeding scanner structure；
Accompanying drawing 5：The scanning section distribution schematic diagram of original copy when main scanning overlapping region is set（Using method one）；
Accompanying drawing 6：The scanning section distribution schematic diagram of original copy when main scanning overlapping region is set（Using method two）；
Accompanying drawing 7：The scanning section distribution schematic diagram of original copy when main scanning overlapping region is set（Using method three）；
Accompanying drawing 8：X-axis transmission mechanism structure chart with many probes（X-axis platform is located at upper end）；
Accompanying drawing 9：X-axis transmission mechanism structure chart with many probes（X-axis platform is located at lower end）；
Accompanying drawing 10：Many probes scan the scanning block distribution schematic diagram formed during one section of original copy；
Accompanying drawing 11：The distribution of Manuscript scanner image overlapping region is illustrated when setting main scanning overlapping region and setting Y-direction compensated scanning
Figure；
Wherein：Dotted arrow in Fig. 3, Fig. 4 represents the direction of original copy movement；
Dotted arrow in Fig. 5, Fig. 6, Fig. 7 represents the track that probe 3 is moved and scanned relative to original copy；
Dotted arrow in Fig. 8, Fig. 9 represents the direction that X-axis platform is moved back and forth.
Specific embodiment
Embodiment 1：
A kind of technical scheme of the flatbed scanner of A4 breadths is disclosed in reference paper 1, sweep limits is about 210mm*
297mm, the width about 210mm wherein scanning is found a view, total optical path is about 270mm.CCD line style imageing sensors can wherein be used
（Such as the TCD2712DG CCD Linear Image Sensors of Toshiba：Valid pixel number 7500*3Line）.
By taking the platform-type/flatbed scanner of A1 breadths as an example, sweep limits is about 840mm*594mm, scanning accuracy
800DPI.If using existing simple scanning pattern（Scan the width 594mm that finds a view）And using CCD line style imageing sensors,
Then need the CCD line style imageing sensors more than 594/25.4*800=18710 points using pixel count（Such as Toshiba
TCD2964BFG CCD Linear Image Sensors：Valid pixel number is 21360*6Line）；Total optical path is about 270mm*
（594mm/210mm）=764mm.Because total optical path is larger, cause the build of scanner larger, required scanning light structures
It is more complicated.Can refer to the device parameter of the LS-3800 large format A1 falt bed scanners of Microtek：Imageing sensor is coloured silk
Colo(u)r streak type CCD, sweep limits are 37 inches * 24 inches (940mm*610mm), scanning accuracy 800DPI, volume are 1330mm*
870mm*880mm, net weight is 172 kilograms.
Below in conjunction with accompanying drawing 1,2, the structure of platform-type/flatbed scanner of the invention is introduced：
Transmission mechanism 4 includes X-axis travel mechanism and Y-axis moving mechanism, wherein：
Y-axis moving mechanism includes y-axis stepper motor 4ya, Y-axis screw mandrel 4yb, Y-axis nut 4yc, Y-axis platform 4yd, Y-axis guide rail
4ye, Y-axis sliding block 4yf, Y-axis supporting construction 4yg；Y-axis screw mandrel 4yb and Y-axis nut 4yc is work in coordination use, Y-axis guide rail 4ye
Used to work in coordination with Y-axis sliding block 4yf；Y-axis supporting construction 4yg is used to fix Y-axis screw mandrel 4yb and Y-axis guide rail 4ye；Y-axis is walked
Stepper motor 4ya is connected with Y-axis screw mandrel 4yb, and Y-axis platform 4yd is connected and fixes with Y-axis nut 4yc and Y-axis sliding block 4yf；Y-axis
Y-axis screw mandrel 4yb is driven to rotate and drive Y-axis nut 4yc to be moved back and forth along Y-axis when stepper motor 4ya is rotated, while driving Y-axis
Platform 4yd is moved back and forth along Y-axis；
On Y-axis platform 4yd, X-axis travel mechanism includes X-axis stepper motor 4xa, X-axis screw mandrel to the integral installation of X-axis travel mechanism
4xb, X-axis nut 4xc, X-axis platform 4xd, X-axis guide rail 4xe, X-axis slide block 4xf, X-axis supporting construction 4xg；X-axis screw mandrel 4xb and X
Axle nut 4xc is used to work in coordination use, X-axis guide rail 4xe and X-axis slide block 4xf to work in coordination；X-axis supporting construction 4xg is used
In fixed X-axis screw mandrel 4xb and X-axis guide rail 4xe；X-axis stepper motor 4xa is connected with X-axis screw mandrel 4xb, X-axis platform 4xd and X-axis
Nut 4xc and X-axis slide block 4xf are connected and fixed；X-axis screw mandrel 4xb is driven to rotate and drive X-axis when X-axis stepper motor 4xa is rotated
Nut 4xc is moved back and forth along X-axis, while driving X-axis platform 4xd to be moved back and forth along X-axis；
The integral installation of probe 3 on X-axis platform 4xd, when X-axis travel mechanism or Y-axis moving mechanism are moved, probe
3 can be moved back and forth with Y-direction both direction in X direction；Original copy 1 is positioned among panorama viewfinder window 5, probe 3
Moving range covering panorama viewfinder window 5 viewfinder range.Because the present invention is using the technical scheme of combined type fractional scanning,
Therefore probe 3 can be using the scanning headstock similar to the existing A3 or A4 flat bed scanners described by reference paper 1（Sweep
The width about 210mm or 297mm that finds a view is retouched, total optical path is about 270mm or 382mm）, compact conformation, stable performance.
Wherein, the difference in selling prices of the CCD line style imageing sensors of different pixels number is very huge.Due to imageing sensor
The overall dimensions change of imageing sensor is limited when pixel count increases, therefore the spacing of photo-sensitive cell diminishes in imageing sensor,
Causing manufacturing cost increases.Using cost can be greatly reduced after technical scheme.
After using technical scheme, by taking the platform-type/flatbed scanner of A1 breadths as an example, the length of scanner
It is basically unchanged with width, but thickness can be reduced to 150-200mm from existing 880mm, and the weight and volume of product also greatly contracts
Subtract.Also, only need to change the size of transmission mechanism 4 and panorama viewfinder window 5 using same structure, increasing a small amount of cost is
The original copy of A0 breadths or more large format can be scanned, this is that existing product cannot be realized.
The main transmission structure for being with stepper motor and screw mandrel is used in the present embodiment, naturally it is also possible to public using other
The drive mechanism known, such as belt pulley or gear.
Embodiment 2：
As shown in accompanying drawing 3,4, for paper feeding scanner, its concrete structure is：
Section viewfinder window 6 is located at the side of original copy movable passageway, and paper feed mechanism 7 includes some groups of rollers 8, is located at original respectively
The both sides of original text movable passageway, a part of roller 8a is arranged at section viewfinder window phase homonymy, two before and after section viewfinder window
End, another part roller 8b is arranged at the opposite side of section viewfinder window, and the roller 8 of original copy movable passageway both sides cooperates
Using, for conveying original copy 1 and for original copy 1 to be flattened so that the order of original copy 1 is passed by section viewfinder window 6 by image
Sensor 2 carries out fractional scanning successively；
Transmission mechanism 4 is located at the phase homonymy of section viewfinder window 6, including X-axis stepper motor 4xa, X-axis screw mandrel 4xb, X-axis nut
4xc, X-axis platform 4xd, X-axis guide rail 4xe, X-axis slide block 4xf, X-axis supporting construction 4xg；X-axis screw mandrel 4xb and X-axis nut 4xc are
Work in coordination use, X-axis guide rail 4xe and X-axis slide block 4xf and used to work in coordination；X-axis supporting construction 4xg is used to fix X-axis silk
Bar 4xb and X-axis guide rail 4xe；X-axis stepper motor 4xa is connected with X-axis screw mandrel 4xb, X-axis platform 4xd and X-axis nut 4xc and X
Axle sliding block 4xf is connected and fixed；X-axis screw mandrel 4xb is driven to rotate and drive X-axis nut 4xc along X when X-axis stepper motor 4xa is rotated
Axle is moved back and forth, while driving X-axis platform 4xd to be moved back and forth along X-axis；The integral installation of probe 3 is passed on X-axis platform 4xd
Motivation structure 4 drives probe 3 to be moved back and forth, scanned the segmentation of original copy 1 among section viewfinder window 6 in X direction
Image, the viewfinder range of the moving range covering section viewfinder window 6 of probe 3.
The shortcoming of this structure is that the more difficult original copy by region to be scanned is moved from original copy if duplex scanning to be carried out
The both sides of passage flatten, therefore are more suitable for single-sweep.But for significantly Surface scan application, usually single-sweep, seldom
The large format original copy of duplex scanning in need, therefore have substantially no effect on practical application.
Further, document edge detection sensor 9 is provided with paper feed mechanism 7, in the rear and front end of section viewfinder window 6
The first edge and trailing edge to original copy 1 are detected respectively.
For the paper feeding scanner for being provided with document edge detection sensor 9, in the scanning process of original copy 1：
First, original copy 1 is detected by front edge detection sensor 9a to enter；
Second, when back edge detection sensor 9b detects 1 edge of original copy, i.e. represent original copy 1 first paragraph area to be scanned
Section has been among section viewfinder window 6, now the pause motion of paper feed mechanism 7, and then transmission mechanism 4 starts, drives probe 3
Move in X direction carries out image scanning to the first paragraph section to be scanned of original copy 1；
3rd, after the completion of section scanning, paper feed mechanism 7 continues for original copy 1 to be fed forward a segment distance, by next area to be scanned
Section is transported to the correspondence position of section viewfinder window 6 and suspends conveying and then be scanned again；And circulate operation successively；
4th, when front edge detection sensor 9a detects 1 end of original copy, the pause motion of paper feed mechanism 7, transmission mechanism 4
Start, drive probe moves carry out image scanning to the latter end section to be scanned of original copy 1 in X direction；Again will by paper feed mechanism 7
Original copy 1 is sent out；
Wherein, the test point of front edge detection sensor 9a and back edge detection sensor 9b may be in section and find a view
The outside of window 6, now should on a small quantity be retreated to original copy 1 by paper feed mechanism 7 or be advanced when scanning two sections of head and the tail
Micro-adjustment.
Existing large format paper feeding scanner because by overall dimensions limited it is many using CIS contact-type image sensors,
Spliced by multiple images sensor combinations and scanned, using the scheme of the present embodiment after, can be used CCD line styles imageing sensors to substitute
CIS contact-type image sensors, so as to obtain the more preferable depth of field and imaging effect, equipment size is essentially identical, device fabrication into
This then declines to a great extent.
The drive mechanism based on stepper motor and screw mandrel is used in the present embodiment, naturally it is also possible to public using other
The drive mechanism known, such as belt pulley or gear.
Embodiment 3：
When the disposal ability of the image data processing system supporting with scanner has affluence, can be using multiple probes 3 simultaneously
The scheme of row scanning：N number of probe 3 is set up in parallel along X-direction, by each section edge to be scanned during fractional scanning
X-direction is divided into N number of block, and the moving range of each probe 3 can be covered each by corresponding block；Each probe 3 is respective
Moved along X-direction and the image of respective position block is scanned by imageing sensor therein 2, then calculated by image mosaic
The view data splicing of each block is synthesized complete scanning section image by method.
As shown in Figure 8,9, with X-axis platform 4xd by be equidistantly set up in parallel three probe 3a of same specification,
As a example by 3b and 3c, then section to be scanned is divided into three by three probes 3 in X direction with X-axis platform 4xd synchronizing movings
Individual block, is scanned respectively by three probes 3, and the edge of each block sets a small amount of overlapping region, for each block
The splicing of image.Now, transmission mechanism moving range Dxn in the X-axis direction is reduced to slightly larger than view area width D x
1/3, when hardware processing capability is enough, you can obtain about 3 times of sweep speed.As shown in Figure 10, three probe 3a, 3b,
3c scans three blocks S1, S2, S3 respectively, there is the overlapping region for intersecting between three blocks, for by three tile images
Splicing is merged into complete section image.
Except the dependency structure of probe is different, other structures are identical with embodiment 1,2 in embodiment 3.
Embodiment 4：
The scheme of combined type fractional scanning is used due to the present invention, therefore there is each section of Bonding Problem of image.Solution party
Case is, when fractional scanning is carried out, overlapping region is set between each scanning section, by the view data to overlapping region
It is analyzed treatment, realizes each section of splicing of image.Specific stitching algorithm has a lot, such as the method in reference paper 3.
Technical scheme can flexibly scan the original copy of different amplitudes, if in advance set the width of overlapping region
Be set to fixed value, then latter end section to be scanned overlapping region width therewith between previous section to be scanned may with it is default
Width it is inconsistent, can in most cases produce a larger overlapping region（Hereinafter referred to as " matching difference "）, this is not
Influence is normally used, and is specifically processed using the one kind among three kinds of following methods：
Method one：Preset the width of overlapping region, between every section of scanning probe 3 relative to original copy 1 in the Y direction
Displacement is fixed, has identical overlapping region between every section of segmented image of scanning acquisition, latter end scanning section
One section of blank image data can be produced in image, is filtered in image mosaic；
Method two：Preset the width of overlapping region, between every section of scanning probe 3 relative to original copy 1 in the Y direction
Except displacement is the scanning of fixed, latter end, there is identical overlapping region between the segmented image that every section of scanning is obtained,
Before scanning latter end scanning section, detect whether original copy has reached end first, will transmission when detecting original copy and having reached end
Mechanism 4 or the stop motion of paper feed mechanism 7 are simultaneously scanned, image and the last period scanning section of now latter end scanning section
Overlapping region width may be inconsistent with default width, filters repeated data in image mosaic；
Method three：When the length of original copy to be scanned is known a priori by, sector number is scanned and to be scanned according to original copy length computation
Section carries out decile, and the overlapping region between each section is consistent, between every section of scanning probe 3 relative to original copy 1 in Y side
Upward displacement is fixed, and specially treated need not be done to latter end scanning section during stitching image（The method of this decile
The degree of accuracy of image mosaic can to greatest extent be improved）.
Such as original copy length is 940mm, and image sensor scan is found a view width for 210mm, then needs for original copy to be divided into 5 sections
（P1、P2、P3、P4、P5）It is scanned, now in the presence of 4 overlapping intervals；As example respectively to being carried out by above-mentioned three kinds of methods
The process for the treatment of is illustrated：
Method one：As shown in Figure 5, overlapping region width is preset for 10mm, and probe 3 is relative to original between every section of scanning
The displacement in the Y direction of original text 1 is 200mm, and the overlapping region width between each section of image of scanning section is unanimously
10mm；Scan image total length is 1030mm, and the end of the image of latter end scanning section has the clear data of 70mm, and image is spelled
Specially treated must be done to this when connecing to be filtered；
Method two：As shown in Figure 6, overlapping region width is preset for 10mm, and probe 3 is relative to original between every section of scanning
The displacement in the Y direction of original text 1 is 200mm, and when latter end scanning section is scanned, probe 3 is relative to original copy 1 in Y
Displacement on direction is 130mm, and scan image total length is 940mm, and the image of latter end scanning section is scanned with the last period
The overlapping region width of section image is 80mm, specially treated must be done to this during image mosaic and be filtered；
Method three：As shown in Figure 7, it is 940mm as predicted the length of scan manuscript, the width of overlapping interval is calculated first,
As（210mm*5-940mm）/ 4=27.5mm, movement in the Y direction of the probe 3 relative to original copy 1 between every section of scanning
Distance is to take 182.5mm, and the overlapping region width between each section of image of scanning section is unanimously 27.5mm, scan image overall length
It is 940mm to spend, and specially treated need not be done to latter end scanning section during stitching image.
In sum, when scanning section sum and being less, matching difference has a certain impact to sweep speed, but simultaneously each
Overlapping region between section scanning also tends to become big, is conducive to the accurate splicing of each section image；And work as original copy length it is bigger,
When scanning section sum increases, influence of the matching difference to sweep speed diminishes.
The method that the above is used is still the unidirectional overlap backoff algorithm similar with prior art, but, it is of the invention
, it is necessary to the overlapping region of splicing is formed by same image sensor scan in technical scheme, and need in the prior art
The overlapping region to be spliced is by different image sensor scans；Therefore the problem that prior art is present is different
There is individual difference, influence joining quality between imageing sensor and mating optical structure, and use technical side of the invention
Case is then substantially not present the problem of uniformity.Therefore, image mosaic scheme of the invention is better than prior art.
However, unidirectionally overlapping backoff algorithm still has certain defect：
1st, as described in the background technology of reference paper 2, " small ripple or bending or logical in scanning sample in sample is scanned
The minor fluctuations crossed in speed cause the visible image error in the transitional region of image sensor semiconductor device, these image errors example
Such as it is shown as line, the two-wire of interrupt line or bias "；
2nd, when validity feature data are less in the part of overlapping region for original copy（Such as overlapping region is by chance without view data
White space or be lines without significant difference feature etc.）, the degree of accuracy of splicing will be affected.
Characteristic based on technical solution of the present invention, can be corresponding specific using more accurate two-way overlap backoff algorithm
Structure is：
One or more small-sized auxiliary image sensors 10 are set in X direction, and between being scanned at every section, probe 3 is relative to original
When original text 1 produces relative movement along Y-direction, start manuscript image data, the i.e. Y that small-sized auxiliary image sensor 10 gathers Y-direction
To compensated scanning, and reference frame when splicing as complete image, concrete structure is divided into two kinds：
First, platform-type/flatbed scanner：Small-sized auxiliary image sensor 10 is fixed on the X-axis platform 4xd of transmission mechanism 4
On（As shown in Figure 1, 2, two small-sized auxiliary image sensors 10 are set）；
Second, paper feeding scanner：Small-sized auxiliary image sensor 10 is fixed on the front end or rear end of section viewfinder window 6（Such as
Fig. 3, shown in 4, two small-sized auxiliary image sensors 10 are set）.
Because the time period of Y-direction compensated scanning is in the interim of each section scanning, therefore main scanning is not interfered with
Efficiency；And the scanning of small-sized auxiliary image sensor 10 find a view width only need 5-20mm can, low cost and data volume
It is smaller.
For the scanner for being provided with small-sized auxiliary image sensor 10, by Y-direction compensated scanning, Manuscript scanner image is original
The overlapping region of data is presented cross one another shape（As shown in figure 11）；In stitching image, it is scanned with each section first
Between X be that according to being spliced, the Y-direction overlapping region for then being gathered with small-sized auxiliary image sensor 10 again is made to overlapping region
It is verification, is finally completed the splicing of complete image.
By above method, local image fluctuation can easier be positioned and correct；And original copy is two sides
Upwards while the probability for producing the phenomenon of " validity feature data are less " is very low, therefore two-way overlap backoff algorithm improves
The quality of image mosaic and the degree of accuracy.
Certainly, the invention is not limited to above-mentioned implementation method, and those of ordinary skill in the art are without prejudice to originally
Equivalent variations or replacement can be also made on the premise of spirit, these equivalent modifications or replacement are all contained in the application right
It is required that in limited range.
Claims (10)
1. large format scanner, it is characterised in that：Including probe (3), transmission mechanism (4)；Probe is provided with image in (3)
Sensor (2), probe (3) couples with transmission mechanism (4)；Probe (3) is moved under the drive of transmission mechanism (4)；
Probe (3) is mobile relative to original copy (1) with Y-direction both direction in X direction respectively and is passed by image in moving process
Sensor (2) carries out the image scanning of sectional to original copy (1).
2. large format scanner according to claim 1, it is characterised in that：The scanner is swept for platform-type/flat
Instrument is retouched, also including panorama viewfinder window (5)；Transmission mechanism (4) includes the X-axis moving machine for realizing sectional scanning motion
Structure and the Y-axis moving mechanism for realizing scanning section motion switch, transmission mechanism (4) drive probe (3) difference in X direction
Moved back and forth with Y-direction both direction, the motion scan scope covering panorama of the imageing sensor (2) in probe (3)
The viewfinder range of viewfinder window (5).
3. large format scanner according to claim 1, it is characterised in that：The scanner is paper feeding scanner, also
Paper feed mechanism (7) including section viewfinder window (6), for realizing movement original copy during scanning section switching；In transmission mechanism (4)
Probe (3) is driven to be moved back and forth in X direction including X-axis travel mechanism, transmission mechanism (4), the image in probe (3)
The viewfinder range of motion scan scope covering section viewfinder window (6) of sensor (2)；Start paper feed mechanism between each section of scanning
(7) switching of scanning section is realized along Y-direction movement original copy.
4. large format scanner according to claim 3, it is characterised in that：Original copy side is provided with the paper feed mechanism (7)
Edge detection sensor (9), is carried out to the first edge and trailing edge of original copy (1) respectively in the rear and front end of section viewfinder window (6)
Detection.
5. large format scanner according to claim 3, it is characterised in that：N number of probe is set up in parallel along X-direction
(3) each section to be scanned, is divided into N number of block in X direction during fractional scanning, the mobile model of each probe (3)
Enclosing can be covered each by corresponding block；Each probe (3) is each moved and by imageing sensor therein along X-direction
(2) image of respective position block is scanned.
6. large format scanner according to claim 2, it is characterised in that：It is small-sized auxiliary that one or more are set in X direction
Help imageing sensor (10), every section scan between, probe (3) relative to original copy (1) along Y-direction produce relative movement when,
Start manuscript image data, i.e. Y-direction compensated scanning that small-sized auxiliary image sensor (10) gathers Y-direction, and as complete graph
Reference frame during as splicing.
7. the scan method of large format scanner, it is characterised in that：In scanning process, the scanning of image taking sensor (2) is found a view
Original copy (1) is divided into multiple scanning sections along Y-direction on the basis of width carries out fractional scanning：
First, probe (3) is aligned the first paragraph section to be scanned of original copy, probe (3) is driven along X by transmission mechanism (4)
Direction movement carries out image scanning to the first paragraph section to be scanned of original copy；
After the completion of the scanning of the first paragraph of original copy section to be scanned, probe (3) is driven to be moved along Y-direction by transmission mechanism (4)
Move or move original copy (1) along Y-direction by paper feed mechanism (7) so that the second segment of probe (3) alignment original copy (1) is to be scanned
Section；
Drive probe (3) to move in X direction by transmission mechanism (4) again carries out figure to the second segment region to be scanned of original copy (1)
As scanning；
Then, scanning of the circulation up to completion to view picture original copy (1) according to this；
Wherein：
For platform-type/flatbed scanner：Original copy is positioned in panorama viewfinder window (5), probe (3) is past in X direction
Fractional scanning original image is moved again, drives probe to be moved along Y-direction by transmission mechanism (4) between every section of scanning so as to sweep
Head (3) is retouched to be directed at next section to be scanned and then be scanned again；And circulation completes scanning process successively；
For paper feeding scanner：The first paragraph section to be scanned of original copy (1) is transported to area along Y-direction by paper feed mechanism (7)
The correspondence position of section viewfinder window (6) simultaneously suspends conveying；Probe (3) motion scan first paragraph section to be scanned in X direction
Original image, conveying original copy (1) is continued between every section of scanning by paper feed mechanism (7) along Y-direction, and next section to be scanned is defeated
It is sent to the correspondence position of section viewfinder window (6) and suspends conveying and then be scanned again；Successively circulation complete scanning process,
Original copy (1) is sent out by paper feed mechanism (7) again.
8. the scan method of large format scanner according to claim 7, it is characterised in that：Examined for being provided with document edge
The paper feeding scanner of sensor (9) is surveyed, in original copy (1) scanning process：
First, original copy (1) is detected by front edge detection sensor (9a) to enter；
Second, when back edge detection sensor (9b) detects original copy (1) edge, i.e. represent original copy (1) first paragraph treat
Scanning section has been among section viewfinder window (6), now paper feed mechanism (7) pause motion, and then transmission mechanism (4) is opened
The mobile first paragraph section to be scanned to original copy (1) carries out image scanning in X direction for dynamic, drive probe (3)；
3rd, after the completion of section scanning, paper feed mechanism (7) continues for original copy (1) to be fed forward a segment distance, waits to sweep by next
Section is retouched to be transported to the correspondence position of section viewfinder window (6) and suspend conveying and then be scanned again；And circulation is grasped successively
Make；
4th, when front edge detection sensor (9a) detects original copy (1) end, paper feed mechanism (7) pause motion, transmission
Mechanism (4) starts, the mobile latter end section to be scanned to original copy (1) carries out image scanning in X direction to drive probe；Again by presenting
Mechanism of paper (7) sends out original copy (1).
9. the scan method of large format scanner according to claim 7, it is characterised in that：When fractional scanning is carried out,
Overlapping region is set between each scanning section, treatment is analyzed by the view data to overlapping region, each section is realized
The splicing of image, is specifically processed using the one kind among three kinds of following methods：
Method one：Preset the width of overlapping region, probe (3) is relative to original copy (1) in the Y direction between every section of scanning
On displacement be it is fixed, every section scanning obtain segmented image between have identical overlapping region, latter end scanning area
One section of blank image data can be produced in the image of section, is filtered in image mosaic；
Method two：Preset the width of overlapping region, probe (3) is relative to original copy (1) in the Y direction between every section of scanning
On displacement be the scanning of fixed, latter end except, there is identical overlay region between the segmented image that every section of scanning is obtained
Domain, before scanning latter end scanning section, detects whether original copy has reached end first, will when detecting original copy and having reached end
Transmission mechanism (4) or paper feed mechanism (7) stop motion are simultaneously scanned, and the image of now latter end scanning section is swept with the last period
The overlapping region width for retouching section may be inconsistent with default width, filters repeated data in image mosaic；
Method three：When the length of original copy to be scanned is known a priori by, sector number is scanned and to be scanned according to original copy length computation
Section carries out decile, and the overlapping region between each section is consistent, and probe (3) is relative to original copy (1) between every section of scanning
Displacement in the Y direction is fixed, and specially treated need not be done to latter end scanning section during stitching image.
10. the scan method of large format scanner according to claim 7, it is characterised in that：For being provided with small-sized auxiliary
The scanner of imageing sensor (10), by Y-direction compensated scanning so that the overlapping region of Manuscript scanner original image data is presented
Cross one another shape；In stitching image, first with each section scan between X to overlapping region be according to being spliced,
Then Y-direction overlapping region again using small-sized auxiliary image sensor (10) collection is finally completed the spelling of complete image as verification
Connect.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109817541A (en) * | 2019-01-31 | 2019-05-28 | 上海精测半导体技术有限公司 | Scan method, control device, detection unit and production system |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101076074A (en) * | 2006-05-15 | 2007-11-21 | 兄弟工业株式会社 | Image-reading device having flatbed scanner |
| CN101212542A (en) * | 2006-12-28 | 2008-07-02 | 兄弟工业株式会社 | Image reading device |
| CN102158624A (en) * | 2011-03-02 | 2011-08-17 | 朱杰 | Double-sided scanning flatbed scanner |
| CN203933769U (en) * | 2014-05-26 | 2014-11-05 | 北京友好创达科技有限公司 | A kind of large format scanner |
-
2017
- 2017-02-15 CN CN201710081018.2A patent/CN106791259B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101076074A (en) * | 2006-05-15 | 2007-11-21 | 兄弟工业株式会社 | Image-reading device having flatbed scanner |
| CN101212542A (en) * | 2006-12-28 | 2008-07-02 | 兄弟工业株式会社 | Image reading device |
| CN102158624A (en) * | 2011-03-02 | 2011-08-17 | 朱杰 | Double-sided scanning flatbed scanner |
| CN203933769U (en) * | 2014-05-26 | 2014-11-05 | 北京友好创达科技有限公司 | A kind of large format scanner |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110248042A (en) * | 2018-03-08 | 2019-09-17 | 精工爱普生株式会社 | The generation method of image read-out and image data |
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| CN110412054B (en) * | 2018-04-28 | 2024-04-30 | 苏州玻色智能科技有限公司 | Glass panel detection equipment and detection image splicing method |
| CN110412054A (en) * | 2018-04-28 | 2019-11-05 | 苏州玻色智能科技有限公司 | A kind of glass panel detection device and detection image joining method |
| CN109817541A (en) * | 2019-01-31 | 2019-05-28 | 上海精测半导体技术有限公司 | Scan method, control device, detection unit and production system |
| CN110099203A (en) * | 2019-05-14 | 2019-08-06 | 苏州经贸职业技术学院 | Fold billing information acquisition device and acquisition method |
| CN110991451A (en) * | 2019-11-01 | 2020-04-10 | 珠海奔图电子有限公司 | Method and device for correcting card area image of scanned image |
| CN110991451B (en) * | 2019-11-01 | 2024-05-07 | 珠海奔图电子有限公司 | Correction method and device for card area image of scanned image |
| CN111131653A (en) * | 2020-01-21 | 2020-05-08 | 西安海慧电子智能科技有限公司 | Super-large-format high-resolution scanning method and related platform type scanner |
| CN111314571A (en) * | 2020-01-21 | 2020-06-19 | 许之敏 | Scanning imaging method, computer equipment and storage medium |
| WO2021147961A1 (en) * | 2020-01-21 | 2021-07-29 | 许之敏 | Scan imaging method, computer device, and storage medium |
| CN112325080A (en) * | 2020-11-16 | 2021-02-05 | 奥士康科技股份有限公司 | Automatic marking method for MI drawing |
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| CN114173018A (en) * | 2021-12-22 | 2022-03-11 | 北京华夏视科技术股份有限公司 | Light path system of scanning device |
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