CN100568905C - The bearing calibration of the large format scanner of forming by a plurality of linear array photoelectric sensors - Google Patents
The bearing calibration of the large format scanner of forming by a plurality of linear array photoelectric sensors Download PDFInfo
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- CN100568905C CN100568905C CNB2007101767294A CN200710176729A CN100568905C CN 100568905 C CN100568905 C CN 100568905C CN B2007101767294 A CNB2007101767294 A CN B2007101767294A CN 200710176729 A CN200710176729 A CN 200710176729A CN 100568905 C CN100568905 C CN 100568905C
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Abstract
The present invention relates to a kind of bearing calibration of the large format scanner of forming by a plurality of linear array photoelectric sensors, belong to the image scanning technical field.A demarcation is blocked the seam crossing that is placed on two adjacent linear array photoelectric sensors A and B, simultaneously demarcation is sticked into line scanning, obtain two width of cloth scan images; Calculate the overlap length of its horizontal direction, obtain the overlaid pixel number A between the two adjacent linear array photoelectric sensor
i, make linear array photoelectric sensors A and B realize splicing in the horizontal direction; With B
iBe the separation of pixel between the two adjacent linear array photoelectric sensor, obtain the pixel sequence number of linear array photoelectric sensors A and B, calculate the shift length of vertical direction, obtain the displacement difference C of its vertical direction
i, linear array photoelectric sensors A and B are consistent in the displacement of vertical direction.The inventive method uses software algorithm to calculate stitching position in real time, reduces large format scanner greatly in process of production to the requirement of machining accuracy, and then has reduced the production and the cost of transportation of equipment.
Description
Technical field
The present invention relates to a kind of bearing calibration of the large format scanner of forming by a plurality of linear array photoelectric sensors, relate in particular to the bearing calibration of the large format scanner of forming by a plurality of linear charge-coupled array (C D) or a plurality of linear array contact-type image sensor (hereinafter to be referred as CIS), belong to the image scanning technical field.
Background technology
Scanner is the optical, mechanical and electronic integration equipment that the physics map is converted into digital picture.Large format scanner requires to cover the above fabric width of A0 (84.1 centimetres, about 33.1 inches) usually.And used photoelectric sensor line array CCD/CIS generally only covers A4 fabric width (21 centimetres, about 8.27 inches).So, if require to cover the above fabric width of A0, then need a plurality of CCD/CIS to work simultaneously, carry out horizontally-splicedly, be about to one group of overlapped image sequence and be spliced into large-scale, seamless, a level and smooth new images.Generally include two steps: carry out image " registration " earlier, promptly find out the position and the scope of overlapping region between adjacent image exactly; After carry out image " fusion ", be about to the adjacent image with overlapping region " stitching " and become seamless and level and smooth brand-new view.
Under the situation that CCD/CIS device resolution is not high, a plurality of photo-sensitive cells of large format scanner just can satisfy the scan task of general contribution under machining and assembling situation in early days.But along with CCD/CIS device resolution brings up to 600 even 1200DPI, the user also improves constantly the requirement of contribution scanning quality, the simple precision of machining that relies on guarantees that the method for the splicing between many CCD/CIS device can not satisfy the demands, and needs a kind of method of the stitching position between can comptograph spare to realize this function.The splicing of many CCD/CIS image is the distinctive problem of large format scanner, also is the concrete application of image split-joint method (Image Mosaics) under multi-thread battle array CCD/CIS situation.
Summary of the invention
The objective of the invention is to propose the bearing calibration of the large format scanner formed by a plurality of linear array photoelectric sensors, when many CCD/CIS collaborative work, by blocking the result who scans to demarcating, calculate the choice position of the mutual seam crossing image pixel of many CCD/CIS and the original position of sub-scanning direction, large format scanner is proofreaied and correct, the result that final many CCD/CIS scanning is obtained can link up smoothly, produces desirable image.
The bearing calibration of the large format scanner of being made up of a plurality of linear array photoelectric sensors that the present invention proposes may further comprise the steps:
(1) establishing the pixel count that linear array photoelectric sensors receives is N, and the pixel sequence number of establishing linear array photoelectric sensors is 1～N, demarcate the seam crossing that card is placed on two adjacent linear array photoelectric sensors A and B with one, simultaneously demarcation is sticked into line scanning with linear array photoelectric sensors A and B, obtain two width of cloth scan images;
(2) calculate the overlap length of horizontal direction between two width of cloth scan images, thereby obtain the overlaid pixel number A between the two adjacent linear array photoelectric sensor
i, then the overlaid pixel sequence number of linear array photoelectric sensors A is (N-A
i+ 1)～and N, the overlaid pixel sequence number of linear array photoelectric sensors B is 1～A
i
(3) with B
iBe the separation of pixel between the two adjacent linear array photoelectric sensor, B
iBe 1～A
iBetween a positive integer, linear array photoelectric sensors A is with B
iAs end pixel, linear array photoelectric sensors B is with B
i+ 1 pixel to start with, then the pixel sequence number of linear array photoelectric sensors A is 1～N-A
i+ B
i, the pixel sequence number of linear array photoelectric sensors B is B
i+ 1～N makes linear array photoelectric sensors A and B realize splicing in the horizontal direction;
(4) calculate the shift length of vertical direction between above-mentioned two width of cloth scan images, thereby obtain the displacement difference C of the vertical direction between the two adjacent linear array photoelectric sensor
i, then when linear array photoelectric sensors A when vertical direction is got the capable image of 1～X, linear array photoelectric sensors B gets the capable image of Ci+1～X+Ci+1 in vertical direction, and linear array photoelectric sensors A and B are consistent in the displacement of vertical direction.
The advantage of the bearing calibration of the large format scanner of being made up of a plurality of linear array photoelectric sensors that the present invention proposes is, use software algorithm to calculate stitching position in real time, solved the problem that original simple dependence machining accuracy guarantees the image stitching position, satisfy engineering use in the requirement of rapidity and accuracy.Use method of the present invention simultaneously, can reduce large format scanner greatly, thereby reduced the production and the cost of transportation of equipment in process of production to the requirement of machining accuracy.
Description of drawings
Fig. 1 is the arrangement schematic diagram of linear array photoelectric sensors in the inventive method.
Fig. 2 is a two adjacent linear array photoelectric sensor horizontal direction overlaid pixel schematic diagram.
Fig. 3 is a figure of demarcating card among embodiment of the inventive method.
Fig. 4 and Fig. 5 are respectively linear array photoelectric sensors A and B stick into line scanning to demarcation images.
Embodiment
The bearing calibration of the large format scanner of being made up of a plurality of linear array photoelectric sensors that the present invention proposes may further comprise the steps:
(1) establishing the pixel count that linear array photoelectric sensors receives is N, and the pixel sequence number of establishing linear array photoelectric sensors is 1～N, demarcation card as shown in Figure 3 is placed on the seam crossing of two adjacent linear array photoelectric sensors A and B, simultaneously demarcation is sticked into line scanning with linear array photoelectric sensors A and B, obtain two width of cloth scan images, the image result as shown in Fig. 4 and Fig. 5.
(2) calculate the overlap length of horizontal direction between two width of cloth scan images, thereby obtain the overlaid pixel number A between the two adjacent linear array photoelectric sensor
i, then the overlaid pixel sequence number of linear array photoelectric sensors A is (N-A
i+ 1)～and N, the overlaid pixel sequence number of linear array photoelectric sensors B is 1～A
i, so just can demarcate card and obtain two adjacent linear array photoelectric sensor horizontal direction overlapping pixel count and position by scanning.
(3) with B
iBe the separation of pixel between the two adjacent linear array photoelectric sensor, B
iBe 1～A
iBetween a positive integer, linear array photoelectric sensors A is with B
iAs end pixel, linear array photoelectric sensors B is with B
i+ 1 pixel to start with, then the pixel sequence number of linear array photoelectric sensors A is 1～N-A
i+ B
i, the pixel sequence number of linear array photoelectric sensors B is B
i+ 1～N makes linear array photoelectric sensors A and B realize splicing, in general B in the horizontal direction
i=A
i/ 2, A wherein
i, B
iNumerical relation as shown in Figure 2.
(4) in calculating chart 4 and Fig. 5 two width of cloth scan images X central point between the shift length of vertical direction, thereby obtain the displacement difference C of the vertical direction between the two adjacent linear array photoelectric sensor
i, then when linear array photoelectric sensors A when vertical direction is got the capable image of 1～X, linear array photoelectric sensors B gets C in vertical direction
i+ 1～X+C
i+ 1 row image makes linear array photoelectric sensors A and B be consistent in the displacement of vertical direction.
If a large format scanner is made up of a plurality of linear array photoelectric sensors, then between adjacent devices, repeat the operation of above step successively, can finish correction work to whole large format scanner.
Since use CCD still be CIS as photoelectric sensor to not influence of stitching algorithm, so below be that example describes with CCD.Delegation's photosensitive unit of line array CCD can represent with a line segment, as shown in Figure 1.Ideally, these line segments should be on same straight line that is parallel to main scanning direction (perpendicular to the medium direction of relative movement), and are end to end, not overlapped, also uninterrupted.Promptly all CCD are corresponding to same the horizontal linear of waiting to sweep on the map.And in actual production and transportation, so all CCD/CIS can not be corrected to above-mentioned ideal situation on main scanning direction (horizontal direction), two adjacent zones that CCD covered should be painstakingly overlapping, to guarantee not lose zone line; On sub-scanning direction (vertical direction), stagger before and after the line segment at each CCD place is also inevitable, and be parallel to each other.So need carry out the image splicing.
Claims (1)
1, a kind of bearing calibration of the large format scanner of being made up of a plurality of linear array photoelectric sensors is characterized in that this method may further comprise the steps:
(1) establishing the pixel count that linear array photoelectric sensors receives is N, and the pixel sequence number of establishing linear array photoelectric sensors is 1～N, demarcate the seam crossing that card is placed on two adjacent linear array photoelectric sensors A and B with one, simultaneously demarcation is sticked into line scanning with linear array photoelectric sensors A and B, obtain two width of cloth scan images, described demarcation card is one to have the card of right-angled intersection pattern;
(2) calculate the overlap length of horizontal direction between two width of cloth scan images, thereby obtain the overlaid pixel number A between the two adjacent linear array photoelectric sensor
i, then the overlaid pixel sequence number of linear array photoelectric sensors A is (N-A
i+ 1)～and N, the overlaid pixel sequence number of linear array photoelectric sensors B is 1～A
i
(3) with B
iBe the separation of pixel between the two adjacent linear array photoelectric sensor, B
iBe 1～A
iBetween a positive integer, linear array photoelectric sensors A is with B
iAs end pixel, linear array photoelectric sensors B is with B
i+ 1 pixel to start with, then the pixel sequence number of linear array photoelectric sensors A is 1～(N-A
i+ B
i), the pixel sequence number of linear array photoelectric sensors B is (B
i+ 1)～and N, make linear array photoelectric sensors A and B realize splicing in the horizontal direction;
(4) calculate the shift length of vertical direction between above-mentioned two width of cloth scan images, thereby obtain the displacement difference C of the vertical direction between the two adjacent linear array photoelectric sensor
i, then when linear array photoelectric sensors A when vertical direction is got the capable image of 1～X, linear array photoelectric sensors B gets (C in vertical direction
i+ 1)～(X+C
i+ 1) goes image, linear array photoelectric sensors A and B are consistent, displacement difference C wherein in the displacement of vertical direction
iBe natural number.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101767294A CN100568905C (en) | 2007-11-02 | 2007-11-02 | The bearing calibration of the large format scanner of forming by a plurality of linear array photoelectric sensors |
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|---|---|---|---|
| CNB2007101767294A CN100568905C (en) | 2007-11-02 | 2007-11-02 | The bearing calibration of the large format scanner of forming by a plurality of linear array photoelectric sensors |
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| CN100568905C true CN100568905C (en) | 2009-12-09 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101909129A (en) * | 2009-06-03 | 2010-12-08 | 鸿富锦精密工业（深圳）有限公司 | Display device |
| CN101860648B (en) * | 2010-04-27 | 2013-04-24 | 王震 | Large format scanner for scanning information bracket assembly movement and scanning method thereof |
| US8922849B2 (en) | 2010-05-27 | 2014-12-30 | Colortrac Limited | Document scanner |
| CN103348666B (en) * | 2010-10-01 | 2016-01-27 | 康泰克斯有限公司 | The two-dimensional calibration that imageing sensor in photoscanner is harmonized |
| CN102456676B (en) * | 2010-10-27 | 2014-09-10 | 亚泰影像科技股份有限公司 | Image sensor |
| CN106162001B (en) * | 2016-07-07 | 2019-05-10 | 宁波舜宇智能科技有限公司 | Image processing system, device and method for displacement sensor |
| CN106550200B (en) * | 2016-12-08 | 2019-04-19 | 中国科学院上海高等研究院 | A kind of image collecting device and method |
| CN109855531B (en) * | 2018-12-10 | 2021-04-23 | 安徽艾睿思智能科技有限公司 | Dimension measuring system for large-format panel material and measuring method thereof |
| CN114260560B (en) * | 2021-12-16 | 2024-03-26 | 北京金橙子科技股份有限公司 | A3-format scanner-based regional scanning large-format galvanometer correction system |
| CN116156342B (en) * | 2023-04-04 | 2023-06-27 | 合肥埃科光电科技股份有限公司 | Multi-linear array image sensor splicing method, linear array image acquisition system and device |
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