CN106803088A - A kind of scaling method and device based on rectangle auxiliary calibration frame - Google Patents
A kind of scaling method and device based on rectangle auxiliary calibration frame Download PDFInfo
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Abstract
This disclosure relates to a kind of scaling method and device based on rectangle auxiliary calibration frame, wherein, methods described demarcates success rate to improve, the judgement that can be demarcated first is made whether to the material picture in rectangle auxiliary calibration frame, when material picture in auxiliary calibration frame is judged as demarcating, material object is taken pictures or is scanned, then to obtain material picture demarcate.The disclosure is improved using auxiliary calibration frame auxiliary and demarcates success rate, image procossing is saved into the network bandwidth, data server memory space to unification size by demarcating, so as to improve OCR recognition success rates.
Description
Technical field
This disclosure relates to image procossing and field of image recognition, specifically, are related to a kind of based on rectangle auxiliary calibration frame
Scaling method and device.
Background technology
With development in science and technology and a large amount of generations of image information with exchange, the automatic Calibration application of image is more and more extensive.
In order to improve the efficiency of management of picture, by the pictorial information of papery, its electronic data is obtained, be increasingly becoming one kind and generally gather
Way to manage.
Mode traditional at present utilizes scanner device, obtains the mode of image data, and the image for obtaining is scanning constant
Precision, is easy to next step using image procossing and OCR, automatically extracts out word therein, numeral etc. useful
Information, adds the database of image information management.Unified query manages such image data in database, realizes the shadow of enterprise
Comprehensive standardization that image tube is managed and prepared.
With a large amount of popularizations and application of smart mobile phone, mobile phone camera also turns into a kind of universal data acquisition equipment,
Relatively conventional acquisition mode, mobile phone collection shoot picture have flexibly, easily advantage.But adopted because different mobile phones shoot
The image of collection is general than larger, and uploading data storage storehouse can take the more network bandwidth；There is the background in addition to image in image
Redundancy, wastes data storage server space；The picture size of different mobile phone collections is not also fixed, and is unfavorable for further
OCR (Optical Character Recognition, optical character identification) discrimination；The image that mobile phone shoots is present three
To in two dimensional image plane, the problem of the deformation for bringing also is unfavorable for further to image spot projection in dimension physical world
Check with OCR identifications, and directly using the image of mobile phone shooting, collecting can also there are following problems：
First, the image for obtaining is shot because there is background redundancy than larger, upload data storage storehouse is accounted for
The more network bandwidth is used, and there is a problem of wasting data storage server space.Secondly as the figure of different mobile phone collections
As size is not fixed, it is unfavorable for further OCR discriminations.Finally, due to shooting angle problem, can make image there is deformation and ask
Topic, is unfavorable for further checking and OCR identifications to image in kind.
The content of the invention
For above-mentioned subproblem, on the one hand, the disclosure discloses a kind of scaling method based on rectangle auxiliary calibration frame,
Methods described comprises the steps：
S100, judge that can the area image to be calibrated of auxiliary calibration inframe be calibrated；
The region to be calibrated is rectangle, is placed in rectangle auxiliary calibration inframe, and each side in region to be calibrated is marked with auxiliary
Determine the corresponding side of frame parallel；
S200, judge auxiliary calibration inframe area image to be calibrated can be calibrated when, auxiliary calibration inframe is treated
Demarcate region to be taken pictures or scanned, obtain corresponding area image to be calibrated；
S300, the area image to be calibrated to obtaining are demarcated.
The method points out shooting personnel the position by material object on image using the auxiliary calibration frame shown on mobile phone screen
Alignment demarcates frame, recycles the known position for demarcating frame on image, and detection is in kind, and rower of going forward side by side is determined, to save Netowrk tape
Wide, data server memory space and raising OCR recognition success rates.
On the other hand, according to methods described, the disclosure also provides a kind of caliberating device based on rectangle auxiliary calibration frame, institute
Stating device includes following modules：
Judge module, image collection module, demarcating module, wherein：
The judge module, is arranged to：Can the area image to be calibrated of auxiliary calibration inframe be judged be calibrated；Its
In, the region to be calibrated is rectangle, is placed in rectangle auxiliary calibration inframe, and region to be calibrated each side and auxiliary calibration frame phase
The side answered is parallel；
Described image acquisition module, is arranged to：Can be marked in the area image to be calibrated for judging auxiliary calibration inframe
Regularly, the region to be calibrated of auxiliary calibration inframe is taken pictures or is scanned, obtained corresponding area image to be calibrated；
The demarcating module, is arranged to：Area image to be calibrated to obtaining is demarcated.
Disclosure device can add the mode of required common hardware to realize by software, it is also possible to by specialized hardware bag
Include application specific integrated circuit, dedicated cpu, private memory, special components and parts etc. to realize, to improve the practicality of method.
Brief description of the drawings
Flow chart schematic diagram on method in Fig. 1 disclosure one embodiment；
The structural diagrams on device are intended in Fig. 2 disclosure one embodiment.
Specific embodiment
In the embodiment on basis, there is provided a kind of scaling method based on rectangle auxiliary calibration frame, using auxiliary
Demarcating frame can reduce the interference of some background informations.Methods described comprises the steps：
S100, judge that can the area image to be calibrated of auxiliary calibration inframe be calibrated；
The region to be calibrated is rectangle, is placed in rectangle auxiliary calibration inframe, and each side in region to be calibrated is marked with auxiliary
Determine the corresponding side of frame parallel；
S200, judge auxiliary calibration inframe area image to be calibrated can be calibrated when, auxiliary calibration inframe is treated
Demarcate region to be taken pictures or scanned, obtain corresponding area image to be calibrated；
S300, the area image to be calibrated to obtaining are demarcated.
In the present embodiment, the region to be calibrated is rectangle, and the angle of rectangle can be fillet, it is also possible to corner, its tool
Body to material object can be following situations：
Situation 1：Thing is in itself rectangle, such as book, paper, card, bill etc..
Situation 2：Material object has an incompleteness, such as taxi invoice, supermarket's receipt, due to tearing so that angular incompleteness in kind,
Or side is not straight line.
In situation (1), region to be calibrated can be identical with natural scale；In situation (2), for the side for having incompleteness, as long as
There is a part for straight line in the part of side residual, can be the straight line where obtaining the side, and region to be calibrated is four
Straight line area defined；For the side for lacking completely, can with it is existing when combining incomplete on the coordinate put, rectangle it is adjacent
The vertical Relation acquisition in border, in this case, the region to be calibrated by it is existing while and it is incomplete while determine together.
Area image to be calibrated can be by acquisition of taking pictures, it is also possible to obtained by scanner.For convenience of demarcating, preferably will
Zone level to be calibrated is placed, and is in 0 degree or 90 degree or so with the side of auxiliary calibration frame, and upper lower deviation is in positive and negative 5 degree.Can also
By region to be calibrated not horizontal positioned, but when in calibration process, can be more complicated.
The size of the auxiliary calibration frame in this method can be in the application to adjust according to actual needs.In this implementation
In example, judge whether the material picture to be obtained can be calibrated using auxiliary calibration frame, can obtain and be conducive to demarcating below
Image, improve image calibration after OCR identification success rate.When being determined to be calibrated, material object is taken pictures or is scanned,
Then the material picture for obtaining is demarcated, by demarcating material picture treatment to unified size, Netowrk tape can be saved
Wide, data server memory space and raising OCR recognition success rates.Judging the auxiliary calibration inframe material picture to be obtained not
When can be calibrated, preferably provide prompting to adjust camera and distance in kind or light etc..
Certainly, this method is readily adaptable for use in stock informationization, for the commodity for not being rectangle, can put commodity
Put in rectangle frame, and adjust the size of auxiliary calibration frame, so that commodity image is clear, the image of acquisition can save storage sky
Between.
On the method that can the area image to be calibrated of auxiliary calibration inframe be calibrated is judged, it is preferred to use Xia Shubu
Suddenly：
S101, the area image to be calibrated for obtaining auxiliary calibration inframe；
S102, in the area image to be calibrated, obtain constitute the region rectangle to be calibrated straight line；
S103, when can simultaneously obtain four straight lines, judge that the area image to be calibrated of the auxiliary calibration inframe can
Demarcate.
In above-mentioned steps S102, if needing to carry out image gray processing treatment when obtaining straight line, obtaining operation should
Should include needing to carry out gray processing treatment to image.
For step S103, when border in kind belongs to situation 1, can be directly using four straight lines on border in kind as waiting to mark
Determine four straight lines in region；For situation 2, there is incompleteness for material object, it is impossible to which the straight border in kind of acquisition, such as taxi are sent out
Cause when ticket is because tearing while being irregular curve, it is possible to use remaining three straight lines are with reference to the irregular side for being torn
That side of the vertical relation reparation missing of the point and rectangle adjacent boundary of minimum or maximum.Wherein, when irregular side is square
The side on above the shape or left side, then combine the minimum point on the irregular side for being torn using remaining three straight lines；When irregular
Below for rectangle or the right side while when, then the maximum point on the irregular side for being torn is combined using remaining three straight lines.
In this case, be considered as obtaining in the area image to be calibrated constitute region rectangle to be calibrated it is upper and lower, left,
Right four straight lines.
When cannot finally obtain four straight lines, or exit treatment that is currently processed or being directly entered next two field picture
Etc., prompting can also be given, can be that current being given is pointed out, or provide prompting when being disposed.
Can be used herein obtain four, the upper and lower, left and right straight line for constituting region rectangle to be calibrated, be to judge
Four angular coordinates for perspective transform can be obtained, the image that can carry out perspective transform can be calibrated.
In the specific method step demarcated to the area image to be calibrated for obtaining, it is preferred to use following methods are carried out
Demarcate：
Four, the upper and lower, left and right straight line of region rectangle to be calibrated is constituted in S301, acquisition area image to be calibrated；
S302, when can simultaneously obtain four straight lines, calculate four angular coordinates of four straight lines；
S303, the coordinate according to each angle point, are dimensioned with reference to given, and rower is entered to image using perspective transform
It is fixed.
In above-mentioned steps, if needing to carry out gray processing when straight line is obtained, it is described obtain should include in operation into
The treatment of row gray processing.The processing speed of straight line is found to improve, operation can be zoomed in and out to the image of straight line to be obtained.When
Then it is acquisition composition region rectangle to be calibrated in area image to be calibrated after scaling in step S301 after zooming in and out
Four, upper and lower, left and right straight line.Correspondingly, after step S302, should also comprise the steps：Each angle that will be obtained
Point coordinates is converted to the coordinate in artwork.Meanwhile, the angular coordinate of foundation is the coordinate in artwork in the step S303, to original
Figure is demarcated.
When judging that four straight lines can not be obtained, treatment can be exited, it is also possible to continue the next demarcation of material picture
Treatment.
It is the size for needing to demarcate to corresponding to a certain DPI calibration maps to be dimensioned.It is given be dimensioned according to deposit
Storage space, image definition need the DPI values for setting, such as 200DPI, 250DPI, 300DPI etc..
In order to improve the treatment effeciency once demarcated, the administrative division map to be calibrated of auxiliary calibration inframe can judged utilizing
Can the straight line as be calibrated stage acquisition, can so be replaced the step S102 using following step：
S102 ', treatment is zoomed in and out to the area image to be calibrated, obtained from the image after scaling constitute it is to be calibrated
Four, the upper and lower, left and right straight line of region rectangle.
If obtaining the operation of straight line, it is necessary to carry out gray processing treatment, obtain and should include carrying out ash in this operation
Degreeization treatment.
Even and if do not utilize the area image to be calibrated for judging auxiliary calibration inframe can be calibrated the stage acquisition straight line,
The treatment effeciency of image can also be improved by obtaining straight line in the scaled image.
In step s 102, following methods, the method are preferably used to be also applied for being scaled in step S102 ' when searching for straight line
Linear search is carried out in figure：
S1021, according to four angular coordinates of auxiliary calibration frame and auxiliary calibration frame area size, in searched image
In, it is determined that constituting four boundary search regions of region rectangle straight line to be calibrated；
S1022, in four boundary search regions, respectively search determine to constitute region rectangle to be calibrated it is upper and lower,
Left and right four straight lines.
It is determined that during region of search, region of search can be determined by setting threshold value.In one embodiment, the threshold value
Be arranged to 0.1, i.e., the coordinate for being provided according to auxiliary calibration frame up and down and left and right offset respectively positive and negative 0.1 times it is high or wide come it is true
Determine region of search.
Scaling treatment mentioned above and gray processing are processed as the pretreatment to image, can improve the treatment effect of image
Rate.Gray processing treatment is carried out to image can improve the treatment effeciency of image while the effective information of image is retained as far as possible.
Gray processing treatment can also be after scaling treatment.
In one embodiment, step S302 can also use following step：
S3021, according to horizontal and vertical Sobel (Sobel) operator, Canny edge graphs are calculated to gray-scale map；
S3022, to Canny edge graphs calculate Hough transformation；
S3023, the edge component for having vicious gradient angle is filtered out, obtain in kind external in first zoomed image
Four straight lines of rectangle.
In one embodiment, disclose one kind carries out caliberating device, described device bag to image using auxiliary calibration frame
Include following modules：
Judge module, image collection module, demarcating module, wherein：
The judge module, is arranged to：Can the area image to be calibrated of auxiliary calibration inframe be judged be calibrated；Its
In, the region to be calibrated is rectangle, is placed in rectangle auxiliary calibration inframe, and region to be calibrated each side and auxiliary calibration frame phase
The side answered is parallel；
Described image acquisition module, is arranged to：Can be marked in the area image to be calibrated for judging auxiliary calibration inframe
Regularly, the region to be calibrated of auxiliary calibration inframe is taken pictures or is scanned, obtained corresponding area image to be calibrated；
The demarcating module, is arranged to：Area image to be calibrated to obtaining is demarcated.
Preferably, the judge module includes following units：
First image acquisition unit, first straight line acquiring unit, identifying unit, wherein：
Described first image acquiring unit, is arranged to：Obtain the area image to be calibrated of auxiliary calibration inframe；
The first straight line acquiring unit, is arranged to：In the area image to be calibrated, composition is obtained to be calibrated
Four, the upper and lower, left and right straight line of region rectangle；
The identifying unit, is arranged to：When can simultaneously obtain four straight lines, the auxiliary calibration inframe is judged
Area image to be calibrated can be demarcated.
Preferably, the first straight line acquiring unit includes following components：
Range searching component, linear search component, wherein：
The range searching component, is arranged to：According to four angular coordinates of auxiliary calibration frame and auxiliary calibration frame
Area size, it is determined that constituting four, the upper and lower, left and right straight line of region rectangle to be calibrated in the area image to be calibrated for obtaining
Region of search；
The linear search component, is arranged to：In four boundary search regions, search determines to constitute area to be calibrated
Four, the upper and lower, left and right straight line of domain rectangle.
Preferably, the demarcating module includes following units：
Second straight line acquiring unit, angle point acquiring unit, demarcation unit, wherein：
The second straight line acquiring unit, is arranged to：Obtain and constitute region square to be calibrated in area image to be calibrated
Four, the upper and lower, left and right straight line of shape；
The angle point acquiring unit, is arranged to：When can simultaneously obtain four straight lines, four straight lines are calculated
Four angular coordinates；
The demarcation unit, is arranged to：According to the coordinate of each angle point, it is dimensioned with reference to given, using saturating
Image is demarcated depending on conversion.
Preferably, the speed of straight line is found to improve, before second straight line acquiring unit obtains straight line, it is possible to use
First scaling processing unit, the area image to be calibrated to obtaining zooms in and out treatment.Correspondingly, second straight line acquiring unit exists
Four, the upper and lower, left and right straight line for constituting region rectangle to be calibrated is obtained in area image to be calibrated after scaling treatment.Meanwhile,
After zooming in and out operation, in addition it is also necessary to which coordinate transformation unit, each angular coordinate that will be obtained in scaling figure is converted to it in original
Coordinate in figure.Correspondingly, in unit is demarcated, the angular coordinate of foundation is also the coordinate in artwork, and artwork is demarcated.
Preferably, the first straight line acquiring unit is replaced using the 3rd straight line acquiring unit；
The 3rd straight line acquiring unit, is arranged to：Treatment is zoomed in and out to the area image to be calibrated, from contracting
Four, the upper and lower, left and right straight line for constituting region rectangle to be calibrated is obtained in image after putting.If needed when straight line is obtained
Gray processing is carried out, then should include carrying out gray processing treatment in the acquisition operation, and gray processing treatment can also be in scaling
After treatment.
Preferably, second straight line acquiring unit can include following components：
Rim detection component, straight-line detection component, filter assemblies, wherein：
The rim detection component, is arranged to：According to horizontal and vertical Sobel (Sobel) operator, to gray-scale map
Calculate Canny edge graphs；
The straight-line detection component, is arranged to：Hough transformation is calculated to Canny edge graphs；
The filter assemblies, are arranged to：The edge component for having vicious gradient angle is filtered out, described second is obtained
Four straight lines of boundary rectangle in kind in zoomed image.
Through the above description of the embodiments, described device realized according to method, those skilled in the art
Can by software described device clearly be added into the mode of required common hardware to realize, naturally it is also possible to by special hard
Part is realized including application specific integrated circuit, dedicated cpu, private memory, special components and parts etc..Generally, it is all by calculating
Machine program complete function easily can be realized with corresponding hardware, and, for realizing the specific of same function
Hardware configuration can also be diversified, such as analog circuit, digital circuit or special circuit etc..But, to the disclosure
In the case of speech is more, methods described realizes it being more preferably implementation method using software program.Based on such understanding, the disclosure
The part that technical scheme substantially contributes to prior art in other words can be embodied in the form of software product, the meter
Calculation machine software product is stored in the storage medium that can read, such as the floppy disk of computer, USB flash disk, mobile hard disk, read-only storage
(ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD
Deng, including some instructions are used to so that computer equipment (can be personal computer, server, or the network equipment etc.)
Perform the method described in the disclosure each embodiment.
The disclosure is described in detail above, used herein specific case principle of this disclosure and embodiment party
Formula is set forth, and the explanation of above example is only intended to help and understands disclosed method and its core concept；Meanwhile, it is right
In those skilled in the art, according to the thought of the disclosure, will change in specific embodiments and applications, it is comprehensive
Upper described, this specification content should not be construed as limitation of this disclosure.
Claims (10)
1. a kind of scaling method based on rectangle auxiliary calibration frame, it is characterised in that methods described comprises the steps：
S100, judge that can the area image to be calibrated of auxiliary calibration inframe be calibrated；
The region to be calibrated is rectangle, is placed in rectangle auxiliary calibration inframe, and region to be calibrated each side and auxiliary calibration frame
Corresponding side is parallel；
S200, judge auxiliary calibration inframe area image to be calibrated can be calibrated when, to the to be calibrated of auxiliary calibration inframe
Region is taken pictures or is scanned, and obtains corresponding area image to be calibrated；
S300, the area image to be calibrated to obtaining are demarcated.
2. method according to claim 1, it is characterised in that the step S100 comprises the steps：
S101, the area image to be calibrated for obtaining auxiliary calibration inframe；
S102, in the area image to be calibrated, obtain constitute the region rectangle to be calibrated straight line；
S103, when can simultaneously obtain four straight lines, judging the area image to be calibrated of the auxiliary calibration inframe can demarcate.
3. method according to claim 1, it is characterised in that the step S300 further includes following step：
Four, the upper and lower, left and right straight line of region rectangle to be calibrated is constituted in S301, acquisition area image to be calibrated；
S302, when can simultaneously obtain four straight lines, calculate four angular coordinates of four straight lines；
S303, the coordinate according to each angle point, are dimensioned with reference to given, and image is demarcated using perspective transform.
4. method according to claim 2, it is characterised in that the step S103 comprises the steps：
S1021, according to four angular coordinates of auxiliary calibration frame and auxiliary calibration frame area size, in searched image, really
Surely four boundary search regions of region rectangle straight line to be calibrated are constituted；
S1022, in four boundary search regions, respectively search determine to constitute region rectangle to be calibrated it is upper and lower, left,
Right four straight lines.
5. method according to claim 2, it is characterised in that the step S102 is replaced using following step：
S102 ', treatment is zoomed in and out to the area image to be calibrated, obtained from the image after scaling and constitute region to be calibrated
Four, the upper and lower, left and right straight line of rectangle.
6. a kind of caliberating device based on rectangle auxiliary calibration frame, it is characterised in that described device includes following modules：
Judge module, image collection module, demarcating module, wherein：
The judge module, is arranged to：Can the area image to be calibrated of auxiliary calibration inframe be judged be calibrated；Wherein,
The region to be calibrated is rectangle, is placed in rectangle auxiliary calibration inframe, and each side in region to be calibrated is corresponding to auxiliary calibration frame
Side it is parallel；
Described image acquisition module, is arranged to：When the area image to be calibrated for judging auxiliary calibration inframe can be calibrated,
The region to be calibrated of auxiliary calibration inframe is taken pictures or scanned, corresponding area image to be calibrated is obtained；
The demarcating module, is arranged to：Area image to be calibrated to obtaining is demarcated.
7. device according to claim 6, it is characterised in that the judge module includes following units：
First image acquisition unit, first straight line acquiring unit, identifying unit, wherein：
Described first image acquiring unit, is arranged to：Obtain the area image to be calibrated of auxiliary calibration inframe；
The first straight line acquiring unit, is arranged to：In the area image to be calibrated, obtain and constitute the area to be calibrated
The straight line of domain rectangle；
The identifying unit, is arranged to：When can simultaneously obtain four straight lines, judge the auxiliary calibration inframe wait mark
Determining area image can demarcate.
8. device according to claim 6, it is characterised in that the demarcating module includes following units：
Second straight line acquiring unit, angle point acquiring unit, demarcation unit, wherein：
The second straight line acquiring unit, is arranged to：Obtain and constitute region rectangle to be calibrated in area image to be calibrated
Four, upper and lower, left and right straight line；
The angle point acquiring unit, is arranged to：When can simultaneously obtain four straight lines, four of four straight lines are calculated
Angular coordinate；
The demarcation unit, is arranged to：According to the coordinate of each angle point, it is dimensioned with reference to given, is become using perspective
Change and image is demarcated.
9. device according to claim 7, it is characterised in that the first straight line acquiring unit includes following components：
Range searching component, linear search component, wherein：
The range searching component, is arranged to：According to four angular coordinates of auxiliary calibration frame and auxiliary calibration frame region
Size, in searched image, it is determined that constituting four boundary search regions of region rectangle straight line to be calibrated；
The linear search component, is arranged to：In four boundary search regions, search determines to constitute area to be calibrated
Four, the upper and lower, left and right straight line of domain rectangle.
10. device according to claim 6, it is characterised in that：
The first straight line acquiring unit is replaced using the 3rd straight line acquiring unit；
The 3rd straight line acquiring unit, is arranged to：Treatment is zoomed in and out to the area image to be calibrated, from after scaling
Image in obtain four, the upper and lower, left and right straight line for constituting region rectangle to be calibrated.
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| CN108446693A (en) * | 2018-03-08 | 2018-08-24 | 上海扩博智能技术有限公司 | Convenient labels method, system, equipment and the storage medium of target to be identified |
| CN108446693B (en) * | 2018-03-08 | 2020-05-12 | 上海扩博智能技术有限公司 | Marking method, system, equipment and storage medium of target to be identified |
| CN109767473A (en) * | 2018-12-30 | 2019-05-17 | 惠州华阳通用电子有限公司 | A kind of panorama parking apparatus scaling method and device |
| CN109767473B (en) * | 2018-12-30 | 2022-10-28 | 惠州华阳通用电子有限公司 | Panoramic parking device calibration method and device |
| CN111764052A (en) * | 2019-04-02 | 2020-10-13 | 黄霏霓 | System applied to sewing data generation of computer pattern sewing machine |
| CN110148174A (en) * | 2019-05-23 | 2019-08-20 | 北京阿丘机器人科技有限公司 | Scaling board, scaling board recognition methods and device |
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