CN110213456A - Scan document bearing calibration, electronic device and computer readable storage medium - Google Patents
Scan document bearing calibration, electronic device and computer readable storage medium Download PDFInfo
- Publication number
- CN110213456A CN110213456A CN201910495660.4A CN201910495660A CN110213456A CN 110213456 A CN110213456 A CN 110213456A CN 201910495660 A CN201910495660 A CN 201910495660A CN 110213456 A CN110213456 A CN 110213456A
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- document
- electronic device
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- plane
- distance
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
-
- 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
- H04N1/00002—Diagnosis, testing or measuring; Detecting, analysing or monitoring not otherwise provided for
- H04N1/00026—Methods therefor
-
- 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
- H04N1/00002—Diagnosis, testing or measuring; Detecting, analysing or monitoring not otherwise provided for
- H04N1/00026—Methods therefor
- H04N1/00029—Diagnosis, i.e. identifying a problem by comparison with a normal state
-
- 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
- H04N1/00127—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture
- H04N1/00249—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a photographic apparatus, e.g. a photographic printer or a projector
- H04N1/00251—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a photographic apparatus, e.g. a photographic printer or a projector with an apparatus for taking photographic images, e.g. a camera
-
- 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
-
- 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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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- General Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Studio Devices (AREA)
Abstract
A kind of scanning document bearing calibration, applied to electric terminal technical field, this method comprises: confirmation camera quantity, specified camera is opened according to the camera quantity, and judge whether the plane of the document is parallel with the plane of electronic device by the corresponding distance measuring method of camera quantity with unlatching, if parallel, the then ratio shared in camera preview screen according to the interface image of the document, judge whether the document is located at preset range at a distance from the electronic device, if being located at the preset range, then judge whether the auxiliary ruling in the direction of the document content and the preview screen of the electronic device is concordant, if concordant, the electronic device is then prompted to complete the scanning correction of the document.The embodiment of the invention also discloses a kind of electronic devices and a kind of computer readable storage medium, the positional relationship of the document and electronic device can be quickly adjusted before shooting and identifying document content, improved shooting, be by the convenience, accuracy rate and efficiency of the document content.
Description
Technical field
The invention belongs to technical field of electronic device more particularly to a kind of scanning document bearing calibrations, electronic device and meter
Calculation machine readable storage medium storing program for executing.
Background technique
Processing is being corrected to the image of the inclination or deformation that have shot, when restoring scan image, is being lacked to scanning
Indeformable, not inclined scanning is realized in the processing of system itself.This scanning alignment technique is flat dependent on hardware such as computers
Platform, when scanner distorsion is serious, it is difficult to or even image can not be corrected.
With the progress of cell phone intelligent terminal, camera pixel has been able to achieve the effect of taking pictures for the scanner that matches in excellence or beauty
Fruit, be scanned using mobile phone have many advantages, such as it is quick, convenient, be easy to share, and scan it is complete after can carry out character recognition,
Directly the contents extraction of documentation is come out, however, mobile phone camera field angle is smaller, is difficult to quickly when holding shooting document
It adjusts and constrains the effect that mobile phone executes scanning function to optimal position and angle.
Summary of the invention
The present invention provides a kind of scanning document bearing calibration, electronic device and computer readable storage medium, can solve text
The speed of position and angle adjustment is slow between shelves and electronic device, inefficient problem.
First aspect of the embodiment of the present invention provides a kind of scanning document bearing calibration, comprising:
Confirm the camera quantity for scanning the electronic device of document；
Specified camera is opened according to the camera quantity, and passes through ranging side corresponding with the camera quantity of unlatching
Formula judges whether the plane of the document is parallel with the plane of the electronic device；
When the plane of the document is parallel with the plane of the electronic device, taken the photograph according to the interface image of the document
As ratio shared in head preview screen, judge whether the document is located at preset range at a distance from the electronic device；
When the document is located at the preset range at a distance from the electronic device, the side of the document content is judged
To whether concordant with the auxiliary ruling in the preview screen of the electronic device, if concordantly, prompting the electronic device to institute
The scanning correction for stating document is completed.
Second aspect of the embodiment of the present invention provides a kind of electronic device, comprising:
Confirmation module, for confirming the camera quantity of the electronic device for scanning document；
First judgment module for opening specified camera according to the camera quantity, and passes through the camera shooting with unlatching
The corresponding distance measuring method of head quantity judges whether the plane of the document is parallel with the plane of the electronic device；
Second judgment module, for when the plane of the document is parallel with the plane of the electronic device, according to described
The interface image of document ratio shared in camera preview screen, judges that the document is at a distance from the electronic device
It is no to be located at preset range；
Third judgment module, for sentencing when the document is located at the preset range at a distance from the electronic device
Break the document content direction and the auxiliary ruling in the preview screen of the electronic device it is whether concordant, if concordantly, mentioning
Show that the electronic device completes the scanning correction of the document.
The third aspect of the embodiment of the present invention provides a kind of electronic device, comprising:
Memory and processor；
The memory is stored with executable program code；
The processor coupled with the memory calls the executable program generation stored in the memory
Code executes the scanning document bearing calibration provided such as first aspect of the embodiment of the present invention.
Fourth aspect of the embodiment of the present invention provides a kind of computer readable storage medium, is stored thereon with computer journey
Sequence, the computer program execute the scanning document school provided such as first aspect of the embodiment of the present invention when being run by processor
The scanning document bearing calibration that correction method or first aspect of the embodiment of the present invention provide.
From the embodiments of the present invention it is found that before camera does not shoot document, the number of camera is opened by confirmation
Amount judge the whether parallel used distance measuring method of document and electronic device to confirm, can be improved the plane for judging document and
The plane of electronic device whether parallel success rate and speed；It is further parallel with the plane of electronic device in the plane of document
When, according to the interface image of document ratio shared in camera preview screen, judge that document is at a distance from electronic device
It is no to be located at preset range, document and electronic device hypertelorism or excessively close are avoided, the image contributions shot are to document content
Identification；Further it is located in the preset range at a distance from document with electronic device, then judges direction and the electronics of document content
Whether the auxiliary ruling in the preview screen of device is concordant, if concordantly, completing electronic device and correcting to the scanning of document, be not necessarily to
Later period is again handled the image of shooting, is realized the quick adjustment of the angles and positions of document and electronic device, is improved
The efficiency of processing, by then passing through the original camera of electronic device and original image processing function, there is no need to additional
Increase hardware, save the cost.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention.
Fig. 1 is the implementation process schematic diagram of scanning document bearing calibration provided in an embodiment of the present invention；
Fig. 2 is the application scenarios schematic diagram of scanning document bearing calibration provided in an embodiment of the present invention；
Fig. 3 be another embodiment of the present invention provides scanning document bearing calibration implementation process schematic diagram；
Fig. 4 is the area schematic that the document in the embodiment of the present invention in the preview screen of camera divides；
Fig. 5 is the plane of document and ranging schematic diagram when the not parallel plane of electronic device in the embodiment of the present invention；
Fig. 6 is the physical boundary of document in the embodiment of the present invention, content boundaries, preview screen boundary schematic diagram；
Fig. 7 is the structural representation of electronic device provided in an embodiment of the present invention；
Fig. 8 be another embodiment of the present invention provides electronic device structural representation；
Fig. 9 shows a kind of Electronic Device Hardware structure chart.
Specific embodiment
In order to make the invention's purpose, features and advantages of the invention more obvious and easy to understand, below in conjunction with the present invention
Attached drawing in embodiment, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described reality
Applying example is only a part of the embodiment of the present invention, and not all embodiments.Based on the embodiments of the present invention, those skilled in the art
Member's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Referring to Fig. 1, Fig. 1 is the implementation process schematic diagram of scanning document bearing calibration provided in an embodiment of the present invention, the party
Method can be applied in electronic device, and electronic device includes that smart phone, tablet computer, laptop etc. can use on the move
Electronic data-processing equipment.This method comprises:
101, confirm the camera quantity for scanning the electronic device of document；
Specifically it can know that Current electronic fills according to the information for the camera recorded in the system configuration file in electronic device
The quantity for the camera set.Application program for confirming camera quantity can also be set in an electronic, answered by this
Camera quantity is obtained with program.
Document in the embodiment of the present invention refers to the interface for recording character content, such as paper, electronic curtain etc..
102, specified camera is opened according to camera quantity, and passes through ranging side corresponding with the camera quantity of unlatching
Formula judges whether the plane of the document is parallel with the plane of electronic device；
If the quantity of camera be it is single, open the camera；If the quantity of camera is two, this two are opened
Camera；If the quantity of camera is two or more, any two of them camera is opened, it is preferable that open two spacing
Farthest camera.
When opening single camera, where judging the plane of the document whether with electronic device by monocular distance measuring method
Plane is parallel；When opening two cameras, by binocular distance measuring method judge the document plane whether with electronic device institute
Parallel in plane, not parallel i.e. expression document is inclined relative to electronic device.
For the ease of user's operation, it is preferable that the camera in the present embodiment is rear camera.
It is further possible to which the rear camera in electric terminal increases multiple spot laser range sensor or TOF (Time
Of flight, flight time) sensor laser dot-matrix, document and electronic device can also be realized by corresponding distance measuring method
The whether inclined detection in relative position.
Fig. 2 is that electronic device 100 opens the first camera 200 and second camera 300, and document 400 is scanned and carried out
The application scenarios schematic diagram of correction.
Further, if it is not parallel, it is issued by showing text on the screen of electronic device, or by electronic device
Voice prompts user to raise the lower side of documents location or the higher side of depressed position, so that the document and electronic device
In parallel, the image fault of document content caused by avoiding the document from tilting relative to electronic device.
If parallel, 103 are thened follow the steps.
103, it when the plane of the document is parallel with the plane of the electronic device, is being imaged according to the interface image of the document
Shared ratio, judges whether the plane of the document is located at preset range at a distance from the electronic device in head preview screen；
If the plane of document and the plane of electronic device are not parallel, user can make the two by adjusting electronic device
In parallel, then further judge whether the document is too far away or too close at a distance from the electronic device, if the plane of the document and electricity
The plane of sub-device is parallel, then directly judges whether the document is too far away or too close at a distance from the electronic device, will affect too far
The accuracy for identifying the document content closely will affect the efficiency and speed of identification the document content excessively.
Specifically, if the interface image of the document ratio shared in camera preview screen preset ratio range it
Outside, then confirm the hypertelorism or excessively close of the document and the electronic device, i.e. the distance is not located in the preset range；If this article
The interface image of shelves ratio shared in camera preview screen then confirms the document and is somebody's turn to do within the scope of the preset ratio
The distance of electronic device is suitable for that is, the distance is located in the preset range.Pass through the flat of sound or text prompt user's the document
Whether face is located at preset range at a distance from the electronic device, and does not further or push away in preset range and is remote.
If be not located in the preset range at a distance from the document and the electronic device, the document content is directly judged
Whether direction and the auxiliary ruling in the preview screen of the electronic device are concordant；If the document position at a distance from the electronic device
In in the preset range, then directly judge that the auxiliary ruling in the direction of the document content and the preview screen of the electronic device is
It is no concordant.
104, when being located at the preset range at a distance from the electronic device when the document, judge the direction of the document content with
Whether the auxiliary ruling in the preview screen of the electronic device is concordant, if concordantly, the electronic device is prompted to sweep the document
Correction is retouched to complete.
The auxiliary ruling is that at least one horizontal line and at least one vertical line by intersecting are constituted.
Judge whether the auxiliary ruling in the direction of the document content and the preview screen of the electronic device is concordant, if flat
Together, then confirm that the electronic device completes the scanning correction of the document, if not concordant, carry out text or voice prompting user rotation
Turn electronic device, so that the direction of the document content is concordant with the auxiliary ruling in the preview screen of the electronic device, completes school
Just.
After completing correction, control camera takes pictures to the document, and identifies the document content in the image of shooting, tool
Body can carry out the knowledge of document content by OCR (Optical Character Recognition, optical character identification) technology
Not.
In the embodiment of the present invention, before camera does not shoot document, the quantity of camera is opened, by confirmation to confirm
Judge document used distance measuring method whether parallel with electronic device, can be improved the plane and electronic device for judging document
Plane whether parallel success rate and speed；Further when the plane of document is parallel with the plane of electronic device, according to document
Interface image ratio shared in camera preview screen, judge whether document is located at default model at a distance from electronic device
It encloses, avoids document and electronic device hypertelorism or excessively close, identification of the image contributions shot to document content；Further exist
Document is located in the preset range at a distance from electronic device, then judges the direction of document content and the preview screen of electronic device
In auxiliary ruling it is whether concordant, if concordantly, completing electronic device and being corrected to the scanning of document, without the later period again to shooting
Image is handled, and is realized the quick adjustment of the angles and positions of document and electronic device, is improved the efficiency of processing, due to
Be by the original camera of electronic device and original image processing function, there is no need to additionally increase hardware, save at
This.
Referring to Fig. 3, Fig. 3 is the implementation process schematic diagram of scanning document bearing calibration provided in an embodiment of the present invention, the party
Method can be applied in electronic device, and this method mainly comprises the steps that
201, confirm the camera quantity for scanning the electronic device of document；
Specifically it can know that Current electronic fills according to the information for the camera recorded in the system configuration file in electronic device
The quantity for the camera set.Application program for confirming camera quantity can also be set in an electronic, answered by this
Camera quantity is obtained with program.
If 202, the quantity of camera is single, open the camera, if the quantity of camera be it is multiple, open it
Middle any two camera, and judge by distance measuring method corresponding with the camera quantity of unlatching the plane and electronics of the document
Whether the plane of device is parallel；
If the quantity of camera be it is single, open the camera；If the quantity of camera is two, this two are opened
Camera；If the quantity of camera is two or more, any two of them camera is opened, it is preferable that open two spacing
Farthest camera.
Single camera is opened, plane where judging the plane of the document whether with electronic device by monocular distance measuring method
In parallel.Specifically, when carrying out monocular ranging, need to predict the focal length of the camera and the width of the document, according to formula: D
The camera is calculated to the distance D of the document in=(W × F)/P, and wherein P refers to the distance between each pixel in the document,
W is the width of the document, and F is the focal length of camera.P can be known previously according to the attribute of document, or the document is clapped
A photo is taken the photograph, the distance between pixel is measured from photo.Optionally, the focal length of the camera can be obtained from the camera
It takes, the width of the document can go out according to the picture recognition of shooting.Alternatively, the focal length of the camera and the width of the document can also
It is customized by the user.
Further, judge whether the plane of the document is parallel with the plane of the electronic device by monocular distance measuring method:
Respectively the central point of the central point to four frames of document and document itself measure vertical range, by electronic device with
The distance of this 5 central points is compared, and whether the plane that can be accurately judged to document is parallel with the plane of electronic device, when
5 central points and the electronic device be equidistant or it is approximately equal, then confirm the plane of document and the plane of the electronic device
In parallel.Wherein, it is approximately equal i.e.: a range difference range can be confirmed, if any 2 central points and the electronic device away from
It is poor within the scope of the range difference from it, then confirm that 5 central points are approximately equal at a distance from the electronic device.
On the other hand, two cameras are opened, the focal length of this two cameras is identical, then judges by binocular distance measuring method
Whether the plane of the document is parallel with plane where electronic device, and specifically, binocular ranging formula is as follows:
Wherein, Z is distance of the document to the electronic device, and f is the focal length of two cameras, and B is two cameras
Center is away from XR-XTFor parallax.Wherein, the center of focal length f and camera can be obtained away from B by calibration, and parallax XR-XT can pass through
2 cameras respectively shoot 1 image and are calculated, and parallax is calculated as common sense in the field, and details are not described herein again.
When carrying out binocular ranging, in the preview screen of camera, the document is divided into multiple regions, such as should
Document in preview screen is divided into 9 regions, specific as shown in Figure 4.When the document plane and electronic device plane not
When parallel, as shown in Figure 5.At least two target areas are chosen in multiple region, are measured by binocular distance measuring method each
The target area calculates respectively the distance between distance difference respectively at a distance from the electronic device, if respectively the range difference is less than
The threshold value of range difference can be e.g. set as 10% by preset threshold, then the plane of the plane and the electronic device that confirm the document is flat
Row, if more than the preset threshold, then confirms that electronic device is bigger than normal relative to the document magnitude of inclination, prompts user by electronic device
It adjusts, that is, is forced down apart from one end bigger than normal or lifting apart from one end less than normal to parallel angle.
If parallel, 203 are thened follow the steps.
203, it when the plane of the document is parallel with the plane of the electronic device, is being imaged according to the interface image of the document
Shared ratio, judges whether the plane of the document is located at preset range at a distance from the electronic device in head preview screen；
If the plane of document and the plane of electronic device are not parallel, user can make the two by adjusting electronic device
In parallel, then further judge whether the document is too far away or too close at a distance from the electronic device, if the plane of the document and electricity
The plane of sub-device is parallel, then directly judges whether the document is too far away or too close at a distance from the electronic device, will affect too far
The accuracy for identifying the document content closely will affect the efficiency and speed of identification the document content excessively.
Specifically, according to the interface image of the document, whether the discrimination at the interface and background environment of analyzing the document is big
In default discrimination, if so, indicating that the interface of the document and background environment are easy to distinguish, this article in the interface image is identified
The physical boundary of shelves, the physical area of the document is calculated according to the physical boundary；
If the physical area of the document ratio shared in the area of camera preview screen is the first preset ratio model
It encloses, then confirms that the document is located at the preset range at a distance from the electronic device；
If the physical area of the document ratio shared in the area of camera preview screen is not the first default ratio
Example range then confirms the document at a distance from the electronic device beyond the preset range.
Further, if according to the interface image of the document, the discrimination at the interface and background environment of analyzing the document is not
Discrimination is preset greater than this, then it represents that the interface of the document is not easy to distinguish with background environment, identifies being somebody's turn to do in the interface image
The content boundaries of document calculate the content area of the document according to the content boundaries；
If the content area of the document ratio shared in the area of camera preview screen is the second preset ratio model
It encloses, then confirms that the document is located at the preset range at a distance from the electronic device；
If the content area of the document ratio shared in the area of camera preview screen is not the second preset ratio
Range then confirms the document at a distance from the electronic device beyond the preset range.
The second preset ratio range is less than the first preset ratio range.
When the interface of the document and background environment are not easy to distinguish, physical area is replaced to sentence with the content area of document
Whether disconnected the document is appropriate at a distance from the electronic device, improves the accuracy of judgement.
The area of the preview screen is to shoot the image area after the picture.It can be obtained by camera system parameter
, it can also be obtained according to the feature modeling of actual preview screen.Physical boundary, content boundaries, the preview screen side of document
Boundary's schematic diagram is as shown in Figure 6.
If be not located in the preset range at a distance from the document and the electronic device, the document content is directly judged
Whether direction and the auxiliary ruling in the preview screen of the electronic device are concordant；If the document position at a distance from the electronic device
In in the preset range, then directly judge that the auxiliary ruling in the direction of the document content and the preview screen of the electronic device is
It is no concordant.
204, when being located at the preset range at a distance from the electronic device when the document, judge the level side of the document content
Whether the horizontal line assisted in ruling or vertical line into the preview screen with the electronic device are parallel, or, judging the document
Whether the vertical direction of content and the vertical line in the auxiliary ruling are parallel, if in parallel, prompting the electronic device to the document
Scanning correct complete.
When opening camera preview the document, confirmation the document is destination document to be corrected, rather than other are unrelated
Object, then confirmation preview document be destination document to be corrected after, show in the preview screen of camera assist lattice
Line.The auxiliary ruling is that at least one horizontal line and at least one vertical line by intersecting are constituted, horizontal line and vertical line
When quantity is more, it is easier to judge whether the document is concordant with the electronic device.
Judge whether the auxiliary ruling in the direction of the document content and the preview screen of the electronic device is concordant, specifically
Ground, grabs the character in the document content, and according to the orientation of the character confirm the document horizontal direction or vertical side
To, that is, the orientation of the character is level, and the document is also horizontal direction, and the orientation of the character is resin, the document
Also it is vertical direction, judges whether the horizontal direction of the document and the horizontal line in the auxiliary ruling are parallel, alternatively, the document
Vertical direction and the vertical line in the auxiliary ruling it is whether parallel, if in the horizontal direction of the document and the auxiliary ruling
The horizontal line is parallel, alternatively, the vertical direction of the document is parallel with the vertical line in the auxiliary ruling, then confirms in the document
The direction of appearance is concordant with the auxiliary ruling in the preview screen of the electronic device, if concordantly, confirming the electronic device to this article
The scanning of shelves, which corrects, to be completed, if not concordant, text or voice prompting user's rotating electric device is carried out, so that the document content
Direction it is concordant with the auxiliary ruling in the preview screen of the electronic device, complete correction.
After completing correction, control camera takes pictures to the document, and identifies the document content in the image of shooting, tool
Body can carry out the knowledge of document content by OCR (Optical Character Recognition, optical character identification) technology
Not.
The present embodiment does not use up details, referring to the description of aforementioned embodiment illustrated in fig. 1.
In the embodiment of the present invention, before camera does not shoot document, the quantity of camera is opened, by confirmation to confirm
Judge document used distance measuring method whether parallel with electronic device, can be improved the plane and electronic device for judging document
Plane whether parallel success rate and speed；Further when the plane of document is parallel with the plane of electronic device, according to document
Interface image ratio shared in camera preview screen, judge whether document is located at default model at a distance from electronic device
It encloses, avoids document and electronic device hypertelorism or excessively close, identification of the image contributions shot to document content；Further exist
Document is located in the preset range at a distance from electronic device, then judges the direction of document content and the preview screen of electronic device
In auxiliary ruling it is whether concordant, if concordantly, completing electronic device and being corrected to the scanning of document, without the later period again to shooting
Image is handled, and is realized the quick adjustment of the angles and positions of document and electronic device, is improved the efficiency of processing, due to
Be by the original camera of electronic device and original image processing function, there is no need to additionally increase hardware, save at
This.
Fig. 7 is referred to, Fig. 7 is the structural schematic diagram of electronic device provided in an embodiment of the present invention, for ease of description, only
Show part related to the embodiment of the present invention.The exemplary electronic device of Fig. 7 can be earlier figures 1, embodiment illustrated in fig. 3 mentions
The executing subject of the scanning document bearing calibration of confession.The electronic device includes:
Confirmation module 701, for confirming the camera quantity of the electronic device for scanning document；
First judgment module 702 for opening specified camera according to the camera quantity, and passes through the camera shooting with unlatching
The corresponding distance measuring method of head quantity judges whether the plane of the document is parallel with the plane of the electronic device；
Second judgment module 703, for when the plane of the document is parallel with the plane of the electronic device, according to the document
Interface image ratio shared in camera preview screen, it is pre- to judge whether the document is located at a distance from the electronic device
If range；
Third judgment module 704, for when the document is located at the preset range at a distance from the electronic device, judgement should
Whether the direction of document content and the auxiliary ruling in the preview screen of the electronic device are concordant, if concordantly, prompting the electronics
Device corrects the scanning of the document and completes.
In the present embodiment, before camera does not shoot document, the quantity of camera is opened by confirmation, to confirm judgement
Distance measuring method used by whether document is parallel with electronic device, can be improved the plane of the plane and electronic device that judge document
Whether parallel success rate and speed；Further when the plane of document is parallel with the plane of electronic device, according to the boundary of document
Face image ratio shared in camera preview screen, judges whether document is located at preset range at a distance from electronic device,
Avoid document and electronic device hypertelorism or excessively close, identification of the image contributions shot to document content；Further in text
Shelves are located in the preset range at a distance from electronic device, then judge in the direction of document content and the preview screen of electronic device
Auxiliary ruling it is whether concordant, if concordantly, completing electronic device and being corrected to the scanning of document, without the later period again to the figure of shooting
As being handled, the quick adjustment of the angles and positions of document and electronic device is realized, the efficiency of processing is improved, due to being
By the original camera of electronic device and original image processing function, there is no need to additionally increase hardware, save the cost.
Refer to Fig. 8, Fig. 8 be another embodiment of the present invention provides electronic device structural schematic diagram, for the ease of saying
Bright, only parts related to embodiments of the present invention are shown.The exemplary electronic device of Fig. 8 can be real shown in earlier figures 1, Fig. 3
The executing subject of the scanning document bearing calibration of example offer is provided.Electronic device shown in the electronic device and Fig. 7 the difference is that:
First judgment module 702, if the quantity for being also used to the camera be it is single, open the camera, and pass through list
Mesh distance measuring method judges whether the plane of the document is parallel with the plane of the electronic device；
If the quantity of the camera be it is multiple, open any two of them camera, and sentence by binocular distance measuring method
Whether the plane of disconnected the document is parallel with the plane of the electronic device.
First judgment module 702, is also used in the preview screen of the camera, and the document is divided into multiple regions；
At least two target areas are chosen in multiple region, and each target area is measured by binocular distance measuring method
Domain calculates respectively the distance between distance difference respectively at a distance from the electronic device；
If respectively the range difference is less than preset threshold, the plane for confirming the document is parallel with the plane of the electronic device.
Second judgment module 703, is also used to the interface image according to the document, analyzes the interface and background environment of the document
Discrimination whether be greater than default discrimination；
If so, identifying the physical boundary of the document in the interface image, the document is calculated according to the physical boundary
Physical area；
If the physical area of the document ratio shared in the area of camera preview screen is the first preset ratio model
It encloses, then confirms that the document is located at the preset range at a distance from the electronic device；
If the physical area of the document ratio shared in the area of camera preview screen is not the first default ratio
Example range then confirms the document at a distance from the electronic device beyond the preset range.
Second judgment module 703, is also used to the interface image according to the document, analyzes the interface and background environment of the document
Discrimination whether be greater than default discrimination；
If it is not, then identifying the content boundaries of the document in the interface image, the document is calculated according to the content boundaries
Content area；
If the content area of the document ratio shared in the area of camera preview screen is the second preset ratio model
It encloses, then confirms that the document is located at the preset range at a distance from the electronic device；
If the content area of the document ratio shared in the area of camera preview screen is not the second preset ratio
Range then confirms the document at a distance from the electronic device beyond the preset range；
Wherein, which is less than the first preset ratio range.
The electronic device further include:
Display module 801 is to school for camera preview the document by opening, and in the document of confirmation preview
After positive destination document, the auxiliary ruling is shown in the preview screen of the camera, the auxiliary ruling by cross one another to
A few horizontal line and at least one vertical line are constituted；
Third judgment module 704 is also used to grab the character in the document content, and true according to the orientation of the character
Recognize the horizontal direction or vertical direction of the document；
Judge whether horizontal direction and the horizontal line in the auxiliary ruling of the document are parallel, alternatively, the document is perpendicular
Whether histogram is to parallel with the vertical line in the auxiliary ruling；
If the horizontal direction of the document is parallel with the horizontal line in the auxiliary ruling, alternatively, the vertical direction of the document
It is parallel with the vertical line in the auxiliary ruling, then confirm in the direction of the document content and the preview screen of the electronic device
Assist ruling concordant.
The details of the present embodiment not to the greatest extent, please refers to the description of earlier figures 1 to embodiment illustrated in fig. 7, details are not described herein again.
In the embodiment of the present invention, before camera does not shoot document, the quantity of camera is opened, by confirmation to confirm
Judge document used distance measuring method whether parallel with electronic device, can be improved the plane and electronic device for judging document
Plane whether parallel success rate and speed；Further when the plane of document is parallel with the plane of electronic device, according to document
Interface image ratio shared in camera preview screen, judge whether document is located at default model at a distance from electronic device
It encloses, avoids document and electronic device hypertelorism or excessively close, identification of the image contributions shot to document content；Further exist
Document is located in the preset range at a distance from electronic device, then judges the direction of document content and the preview screen of electronic device
In auxiliary ruling it is whether concordant, if concordantly, completing electronic device and being corrected to the scanning of document, without the later period again to shooting
Image is handled, and is realized the quick adjustment of the angles and positions of document and electronic device, is improved the efficiency of processing, due to
Be by the original camera of electronic device and original image processing function, there is no need to additionally increase hardware, save at
This.
The embodiment of the invention also provides a kind of electronic devices, comprising: memory, processor and is stored in the memory
Computer program that is upper and can running on the processor, when the processor executes the computer program, is realized as before
State scanning document bearing calibration described in Fig. 1 and Fig. 3.
Referring to Fig. 9, Fig. 9 is the hardware structure diagram of the electronic device in the embodiment of the present invention.
Illustratively, electronic device can be various types of departments of computer science that are mobile or portable and executing wireless communication
Any one of equipment of uniting.Specifically, electronic device can be mobile phone or smart phone (for example, being based on iPhone
TM, the phone based on Android TM), portable gaming device (such as Nintendo DS TM, PlayStation
Portable TM, Gameboy Advance TM, iPhone TM), laptop computer, PDA, portable Internet appliance, sound
Happy player and data storage device, other handheld devices and wrist-watch, earphone, pendant, earphone etc., electronic device is also
Can for other wearable devices (for example, such as electronic glasses, electronics clothes, electronics bracelet, electronics necklace, electronics tatoo,
The headset equipment (HMD) of electronic equipment or smartwatch).
Electronic device can also be that any one of multiple electronic equipments, multiple electronic equipments include but is not limited to honeycomb
Phone, smart phone, other wireless telecom equipments, personal digital assistant, audio player, other media players, music note
It records device, video recorder, camera, other medium recorders, radio, Medical Devices, vehicle transport instrument, calculator, may be programmed
Remote controler, pager, laptop computer, desktop computer, printer, netbook computer, personal digital assistant (PDA), just
Formula multimedia player (PMP), Motion Picture Experts Group (MPEG-1 or MPEG-2) audio layer 3 (MP3) player are taken, it is portable
Medical Devices and digital camera and combinations thereof.
In some cases, electronic device can execute multiple functions and (for example, playing music, show video, store picture
And send and receive call).If desired, electronic device can be such as cellular phone, media player, other hands
The portable device of holding equipment, watch equipment, pendant equipment, receiver device or other compact portable equipment.
As shown in figure 9, electronic equipment 10 may include control circuit, which may include storage and processing circuit
30.The storage and processing circuit 30 may include memory, such as hard drive memory, nonvolatile memory (such as dodge
Deposit or be used to form the memory etc. of other electronic programmable limit deletings of solid state drive), volatile memory (such as it is quiet
State or dynamic random access memory etc.) etc., the embodiment of the present application is with no restriction.Store and process the processing circuit in circuit 30
It can be used for the operating of controlling electronic devices 10.The processing circuit microprocessor, microcontroller can count based on one or more
Word signal processor, baseband processor, power management unit, audio codec chip, specific integrated circuit, display driver
Integrated circuit etc. is realized.
Storage and processing circuit 30 can be used for running the software in electronic equipment 10, such as the Internet browser application program,
Voice over internet protocol (Voice over Internet Protocol, VOIP) call application program, Email are answered
With program, media play-back application, operation system function etc..These softwares can be used for executing some control operations, for example,
Image Acquisition based on camera, the ambient light measurement based on ambient light sensor, the proximity sensor based on proximity sensor
Measurement, the information display function that the positioning indicators such as status indicator lamp based on light emitting diode are realized are passed based on touching
The touch event of sensor detects, function associated with information show on multiple (such as layering) displays, with execution nothing
The associated operation of line communication function, operation associated with collecting and generating audio signal, presses with collection and treatment button
Other functions etc. in the associated control operation of event data and electronic equipment 10, the embodiment of the present application is with no restriction.
Electronic equipment 10 can also include input-output circuit 42.Input-output circuit 42 can be used for making electronic equipment 10
Realize outputting and inputting for data, i.e. permission electronic equipment 10 allows electronic equipment 10 that will count from outer equipment receiving data and also
According to from the output of electronic equipment 10 to external equipment.Input-output circuit 42 may further include sensor 32.Sensor 32 can
To include ambient light sensor, the proximity sensor based on light and capacitor, touch sensor is (for example, be based on light touch sensor
And/or capacitive touch sensors, wherein touch sensor can be a part of touching display screen, can also be used as one
Touch sensor arrangement independently uses), acceleration transducer and other sensors etc..
Input-output circuit 42 can also include one or more displays, such as display 14.Display 14 can wrap
Include liquid crystal display, organic light emitting diode display, electronic ink display, plasma display uses other display skills
One or several kinds of combination in the display of art.Display 14 may include touch sensor array (that is, display 14 can be with
It is touching display screen).Touch sensor can be by transparent touch sensor electrode (such as tin indium oxide (ITO) electrode) battle array
The capacitive touch sensors formed are arranged, or can be the touch sensor formed using other touching techniques, such as sound wave
Touch-control, pressure sensible touch, resistive touch, optical touch etc., the embodiment of the present application is with no restriction.
Electronic equipment 10 can also include audio component 36.Audio component 36 can be used for providing audio for electronic equipment 10
Output and input function.Audio component 36 in electronic equipment 10 may include loudspeaker, microphone, buzzer, tone generation
Device and other components for being used to generate and detect sound.
Telecommunication circuit 38 can be used for providing the ability with external device communication for electronic equipment 10.Telecommunication circuit 38 can be with
Radio communication circuit including analog- and digital- input-output interface circuit, and based on radiofrequency signal and/or optical signal.Communication
Radio communication circuit in circuit 38 may include radio-frequency transceiver circuitry, power amplifier circuit, low-noise amplifier, open
Pass, filter and antenna.For example, the radio communication circuit in telecommunication circuit 38 may include for by transmitting and reception
Near-field coupling electromagnetic signal supports the circuit of near-field communication (Near Field Communication, NFC).For example, communication
Circuit 38 may include near-field communication aerial and near-field communication transceiver.Telecommunication circuit 38 can also include cellular telephone transceiver
And antenna, wireless lan transceiver circuit and antenna etc..
Electronic equipment 10 can further include battery, power management circuitry and other input-output units 40.It is defeated
Enter-output unit 40 may include button, control stick, click wheel, scroll wheel, touch tablet, keypad, keyboard, camera shines
Diode and other positioning indicators etc..
User can input a command for the operation of controlling electronic devices 10 by input-output circuit 42, and can make
Status information and other outputs from electronic equipment 10 are received with the output data of input-output circuit 42 to realize.
Further, the embodiment of the invention also provides a kind of computer readable storage medium, the computer-readable storages
Medium can be in the electronic device being set in the various embodiments described above, which can be earlier figures 9
The memory in storage and processing circuit 30 in illustrated embodiment.Computer journey is stored on the computer readable storage medium
Sequence, the program realize scanning document bearing calibration described in aforementioned embodiment illustrated in fig. 3 when being executed by processor.Further
, the computer can storage medium can also be USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory),
The various media that can store program code such as RAM, magnetic or disk.
It should be noted that for the various method embodiments described above, describing for simplicity, therefore, it is stated as a series of
Combination of actions, but those skilled in the art should understand that, the present invention is not limited by the sequence of acts described because
According to the present invention, certain steps can use other sequences or carry out simultaneously.Secondly, those skilled in the art should also know
It knows, the embodiments described in the specification are all preferred embodiments, and related actions and modules might not all be this hair
Necessary to bright.In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, there is no detailed description in some embodiment
Part may refer to the associated description of other embodiments.
The above are to scanning document bearing calibration provided by the present invention, electronic device and computer readable storage medium
Description, for those skilled in the art, thought according to an embodiment of the present invention, in specific embodiments and applications
It will change, to sum up, the contents of this specification are not to be construed as limiting the invention.
Claims (10)
1. a kind of scanning document bearing calibration is applied to electronic device, which is characterized in that the described method includes:
Confirm the camera quantity for scanning the electronic device of document；
Specified camera is opened according to the camera quantity, and is sentenced by distance measuring method corresponding with the camera quantity of unlatching
Break the document plane it is whether parallel with the plane of the electronic device；
When the plane of the document is parallel with the plane of the electronic device, according to the interface image of the document in camera
Shared ratio, judges whether the document is located at preset range at a distance from the electronic device in preview screen；
When the document is located at the preset range at a distance from the electronic device, judge the direction of the document content with
Whether the auxiliary ruling in the preview screen of the electronic device is concordant, if concordantly, prompting the electronic device to the text
The scanning of shelves, which corrects, to be completed.
2. the method according to claim 1, wherein described open specified camera shooting according to the camera quantity
Head, and the plane of the document and putting down for the electronic device are judged by distance measuring method corresponding with the camera quantity of unlatching
Face whether include: in parallel
If the quantity of the camera be it is single, open the camera, and the document is judged by monocular distance measuring method
Plane it is whether parallel with the plane of the electronic device；
If the quantity of the camera be it is multiple, open any two of them camera, and judge by binocular distance measuring method
Whether the plane of the document is parallel with the plane of the electronic device.
3. according to the method described in claim 2, it is characterized in that, described judge the flat of the document by binocular distance measuring method
Whether face is parallel with the plane of the electronic device to include:
In the preview screen of the camera, the document is divided into multiple regions；
At least two target areas are chosen in the multiple region, and each target area is measured by binocular distance measuring method
Domain calculates the distance between each distance difference respectively at a distance from the electronic device；
If each range difference is less than preset threshold, confirm that the plane of the document is parallel with the plane of the electronic device.
4. according to the method described in claim 3, it is characterized in that, the interface image according to the document is pre- in camera
Look at shared ratio in picture, judge the document at a distance from the electronic device whether positioned at preset range include:
Whether it is greater than preset areas according to the discrimination of the interface image of the document, the interface and background environment of analyzing the document
Indexing；
If so, identifying the physical boundary of the document in the interface image, the text is calculated according to the physical boundary
The physical area of shelves；
If the physical area of document ratio shared in the area of camera preview screen is the first preset ratio range,
Then confirm that the document is located at the preset range at a distance from the electronic device；
If the physical area of document ratio shared in the area of camera preview screen is not the described first default ratio
Example range then confirms the document at a distance from the electronic device beyond the preset range.
5. according to the method described in claim 3, it is characterized in that, the interface image according to the document is pre- in camera
Look at shared ratio in picture, judge the document at a distance from the electronic device whether positioned at preset range include:
Whether it is greater than preset areas according to the discrimination of the interface image of the document, the interface and background environment of analyzing the document
Indexing；
If it is not, then identifying the content boundaries of the document in the interface image, the text is calculated according to the content boundaries
The content area of shelves；
If the content area of document ratio shared in the area of camera preview screen is the second preset ratio range,
Then confirm that the document is located at the preset range at a distance from the electronic device；
If the content area of document ratio shared in the area of camera preview screen is not the second preset ratio model
It encloses, then confirms the document at a distance from the electronic device beyond the preset range；
Wherein, the second preset ratio range is less than the first preset ratio range.
6. method according to claim 4 or 5, which is characterized in that described to open specified take the photograph according to the camera quantity
As after head further include:
Document described in camera preview by unlatching, and after the document of confirmation preview is destination document to be corrected,
Show that the auxiliary ruling, the auxiliary ruling are horizontal by at least one to cross one another in the preview screen of the camera
Line and at least one vertical line are constituted.
7. according to the method described in claim 6, it is characterized in that, direction and the electronics of the judgement document content
Auxiliary ruling in the preview screen of device whether concordantly include:
Grab the character in the document content, and according to the orientation of the character confirm the document horizontal direction or
Vertical direction；
Judge whether horizontal direction and the horizontal line in the auxiliary ruling of the document are parallel, alternatively, the document
Vertical direction and it is described auxiliary ruling in the vertical line it is whether parallel；
If the horizontal direction of the document is parallel with the horizontal line in the auxiliary ruling, alternatively, the document is vertical
Direction is parallel with the vertical line in the auxiliary ruling, then confirm the document content direction and the electronic device
Auxiliary ruling in preview screen is concordant.
8. a kind of electronic device, which is characterized in that the electronic device includes:
Confirmation module, for confirming the camera quantity of the electronic device for scanning document；
First judgment module for opening specified camera according to the camera quantity, and passes through the camera number with unlatching
It measures corresponding distance measuring method and judges whether the plane of the document is parallel with the plane of the electronic device；
Second judgment module, for when the plane of the document is parallel with the plane of the electronic device, according to the document
Interface image ratio shared in camera preview screen, judge the document at a distance from the electronic device whether position
In preset range；
Third judgment module, for judging institute when the document is located at the preset range at a distance from the electronic device
Whether direction and the auxiliary ruling in the preview screen of the electronic device for stating document content are concordant, if concordantly, prompting institute
Electronic device is stated to complete the scanning correction of the document.
9. a kind of electronic device, which is characterized in that the electronic device includes:
Memory and processor；
The memory is stored with executable program code；
The processor coupled with the memory calls the executable program code stored in the memory, holds
Scanning document bearing calibration of the row as described in any one of claims 1 to 7.
10. a kind of computer readable storage medium, which is characterized in that be stored thereon with computer program, the computer program
When being run by processor, the scanning document bearing calibration as described in any one of claims 1 to 7 is executed.
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