CN104159000B - A kind of scan image acquisition methods and device - Google Patents
A kind of scan image acquisition methods and device Download PDFInfo
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- CN104159000B CN104159000B CN201410414970.6A CN201410414970A CN104159000B CN 104159000 B CN104159000 B CN 104159000B CN 201410414970 A CN201410414970 A CN 201410414970A CN 104159000 B CN104159000 B CN 104159000B
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Abstract
The embodiment of the invention discloses a kind of scan image acquisition methods and device, this method to include：Detection acts on the instruction of mobile terminal；If detecting preset scan instruction, the distance between the camera of the mobile terminal and described scanning object are obtained；The acquisition parameters of the camera are calculated according to the distance；Start the camera and control the camera and the scanning object is shot according to the acquisition parameters, to obtain the scan image with the scanning object equal proportion.The technical solution of the embodiment of the present invention can obtain the scan image with scanning object equal proportion by mobile terminal, can reduce dependence of the user to scanner or duplicator.
Description
Technical field
The present invention relates to computer application technologies, and in particular to a kind of scan image acquisition methods and device.
Background technology
In today's society, generally require to do many certificates or file, such as identity card, employee's card, student's identity card, educational background
Card, diploma, academic title's certificate and technical ability certificate etc. and various contracts, agreement, bidding documents and documentary evidence etc..It is done when outgoing
To be to people if at this time without duplicator or scanner when thing needs some certificates or the scanned copy of file original size
Life brings very big inconvenience.
And although the mobile terminals such as the portable mobile phone of user, camera, tablet computer have camera function, it is general
The image directly shot by the camera of mobile terminal be all difficult be the image being imaged by initial data size, cannot meet and sweep
Retouch the requirement of part.
Invention content
In view of this, a kind of scan image acquisition methods of offer of the embodiment of the present invention and device, to be obtained by mobile terminal
Obtain the scan image with scanning object equal proportion.
In a first aspect, an embodiment of the present invention provides a kind of scan image acquisition methods, including：
Detection acts on the instruction of mobile terminal；
If detecting preset scan instruction, obtain between the camera of the mobile terminal and the scanning object
Distance；
The acquisition parameters of the camera are calculated according to the distance；
Start the camera and control the camera and the scanning object is clapped according to the acquisition parameters
It takes the photograph, to obtain the scan image with the scanning object equal proportion.
Second aspect, the embodiment of the present invention additionally provide a kind of scan image acquisition device, including：
Instruction detection unit, for detecting the instruction for acting on mobile terminal；
Distance acquiring unit, if for detecting preset scan instruction, obtain the camera of the mobile terminal with
The distance between described scanning object；
Acquisition parameters computing unit, the acquisition parameters for calculating the camera according to the distance；
Shooting unit, for starting the camera and controlling the camera according to the acquisition parameters to the scanning
Object is shot, to obtain the scan image with the scanning object equal proportion.
The technical solution of the embodiment of the present invention acts on the instruction of mobile terminal by detection, if detecting preset scanning
Instruction, then obtain the distance between the camera of the mobile terminal and described scanning object, and institute is calculated according to the distance
The acquisition parameters of camera are stated, then starts the camera and controls the camera and swept to described according to the acquisition parameters
It retouches object to be shot, the scan image with scanning object equal proportion can be obtained by mobile terminal, user couple can be reduced
The dependence of scanner or duplicator.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, institute in being described below to the embodiment of the present invention
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the present invention
Example without creative efforts, can also be implemented for those of ordinary skill in the art according to the present invention
The content of example and these attached drawings obtain other attached drawings.
Fig. 1 is the scan image acquisition methods flow chart described in the embodiment of the present invention one；
Fig. 2 is the scan image acquisition methods flow chart described in the embodiment of the present invention two；
Fig. 3 is the structure diagram of the scan image acquisition device described in the embodiment of the present invention three；
Fig. 4 is the structure diagram of the scan image acquisition device described in the embodiment of the present invention four.
Specific implementation mode
For make present invention solves the technical problem that, the technical solution that uses and the technique effect that reaches it is clearer, below
The technical solution of the embodiment of the present invention will be described in further detail in conjunction with attached drawing, it is clear that described embodiment is only
It is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those skilled in the art exist
The every other embodiment obtained under the premise of creative work is not made, shall fall within the protection scope of the present invention.
Technical solution to further illustrate the present invention below with reference to the accompanying drawings and specific embodiments.
Embodiment one
Fig. 1 is the scan image acquisition methods flow chart that the embodiment of the present invention one provides, and the present embodiment is applicable to use
Camera in mobile terminal shoots the case where scan image with scanning object equal proportion, and this method can be by configuring
Scan image acquisition device in mobile terminal executes, as shown in Figure 1, the scan image acquisition methods packet described in the present embodiment
It includes：
S101, detection act on the instruction of mobile terminal.
Instruction described in the present embodiment includes user by operating the instruction, language that the physical button of the mobile terminal is sent out
Sound instruction, gesture instruction, the trigger signal instruction etc. that the touch screen of the mobile terminal is sent out.
If S102, detecting preset scan instruction, the camera of the mobile terminal and the scanning target are obtained
The distance between object.
Obtaining the distance between the camera of the mobile terminal and described scanning object can be by described mobile whole
One rangefinder (such as proximity sensor, infrared distance meter, ultrasonic wave distance meter, laser distance meter etc.) is installed to obtain to measure on end
Take, if the rangefinder with the camera in the plane parallel with plane where the screen of the mobile terminal, pass through institute
The distance between camera that the distance that rangefinder directly acquires is the mobile terminal and described scanning object are stated, it is no
Then, the distance between the rangefinder and the scanning object can be obtained first, then taken the photograph with described according to the rangefinder
As (the i.e. described rangefinder is with the camera relative to shifting with the range difference of plane where the screen of the mobile terminal respectively for head
The range difference in the vertical line direction of plane where the screen of dynamic terminal), the camera shooting is calculated according to the distance and the range difference
The distance between head and the scanning object.
S103, the acquisition parameters that the camera is calculated according to the distance.
The purpose of this operation is in order to calculate the acquisition parameters of the camera according to the distance, with to the camera
Parameter setting is carried out, the camera is enable to shoot the image of equal proportion.
The parameter of camera includes focal length, field angle, aperture etc..
Focal length is the distance between camera lens and photosensitive element of camera, by the focal length for changing camera lens, thus it is possible to vary mirror
The amplification factor of head changes the size of shooting image.When object is far at a distance from camera lens, following formula can be passed through
Expression：
Amplification factor ≈ focal lengths/object distance of camera lens
Increase the focal length of camera lens, amplification factor increases, distant view can further, and the range of picture is small, distant view it is thin
Beat must become apparent from, if reducing the focal length of camera lens, amplification factor reduces, and the range of picture expands, and can take more
Big scene.
Preferably, the operation for the acquisition parameters for calculating the camera according to the distance may particularly include：According to institute
State the focal length that distance calculates the camera so that the focal length be equal between the camera and the scanning object away from
From.
Therefore, in order to obtain the shooting image of equal proportion, i.e. amplification factor is equal to 1, then makes the focal length etc. of the camera
In the distance between the camera and the scanning object.
Engineering in practice, commonly use horizontal field of view angle reflection picture coverage, focal length is bigger, and field angle is smaller,
The picture range formed on photosensitive element is smaller；Conversely, focal length is smaller, field angle is bigger, the picture formed on photosensitive element
Range is bigger.
Aperture be mounted on camera lens rear portion, aperture is opened bigger, bigger by the light quantity of camera lens, the image of shooting it is clear
Clear degree is higher；Aperture is opened smaller, and by the light quantity of camera lens with regard to smaller, the clarity of image is lower.
It, can direct basis after the distance between the camera and the scanning object for getting the mobile terminal
The distance and the field angle of camera calculate the actual size currently found a view.
S104, start the camera and control the camera according to the acquisition parameters to the scanning object into
Row shooting, to obtain the scan image with the scanning object equal proportion.
The present embodiment in order to ensure when scanning object is shot without deformation, it is desirable that the camera and the scanning mesh
It is parallel to mark object, keeps the camera is parallel with the scanning object various ways can be used.Such as：
Mode one is adjusted manually by user；
Mode two obtains rangefinder to the scanning object by the rangefinder of the preset number on the mobile terminal
The distance between；If the distance acquired in the rangefinder of the preset number is equal, according to equal distance acquisition
The distance between the camera of mobile terminal and the scanning object；Otherwise prompt user by the mobile terminal be adjusted to
The parallel state of the scanning object, and repeat the above operation.
If that is, the distance acquired in the rangefinder of the preset number is unequal, illustrate that the camera is swept with described
It is not parallel to retouch object, needs to be adjusted mobile terminal, for example, prompt user by the mobile terminal be adjusted to it is described
The parallel state of object is scanned, and re-executes above-mentioned acquisition distance, judge whether equal step.
Because 3 points point-blank do not determine a plane, if the rangefinder of the preset number is not the same as always
On line, then when the number of rangefinder is 3 or 3 or more, if each rangefinder is equal to the distance between the scanning object,
Then centainly illustrate that the display screen of mobile terminal is parallel with the scanning object.Therefore, preferably, the preset number is more than
Or it is equal to 3, further preferably 3.
Mode three, the mobile terminal camera be rotatable camera, starting the camera and described in controlling
Before camera shoots the scanning object according to the acquisition parameters, it can be revolved using described in sensor adjust automatically
Turn the direction of camera, so that the rotatable camera is parallel with the scanning object.
Those skilled in the art it should be clear that, it is above to keep the camera parallel with the scanning object
For three kinds of modes only as an example, being not intended to limit the technical solution of the present embodiment, any deformation of said program is included in this reality
Within the protection domain for applying the technical solution of example.
The technical solution of the present embodiment acts on the instruction of mobile terminal by detection, if detecting, preset scanning refers to
It enables, then obtains the distance between the camera of the mobile terminal and described scanning object, according to the distance calculating
Then the acquisition parameters of camera start the camera and control the camera according to the acquisition parameters to the scanning
Object is shot, and the scan image with scanning object equal proportion can be obtained by mobile terminal, can reduce user to sweeping
Retouch the dependence of instrument or duplicator.
Embodiment two
The present embodiment illustrates the technical side of the present embodiment so that the camera of the mobile terminal is rotatable camera as an example
Case, Fig. 2 is the scan image acquisition methods flow chart described in the present embodiment, as shown in Fig. 2, the scan image described in the present embodiment
Acquisition methods include：
S201, detection act on the instruction of mobile terminal.
If S202, detecting preset scan instruction, the camera of the mobile terminal and the scanning target are obtained
The distance between object.
S203, the acquisition parameters that the camera is calculated according to the distance.
S204, using the direction of rotatable camera described in sensor adjust automatically so that the rotatable camera with
The scanning object is parallel.
The camera of mobile terminal described in the present embodiment is rotatable camera, can be revolved using described in sensor adjust automatically
Turn the direction of camera, so that the rotatable camera is parallel with the scanning object.
For example, the scanning object is horizontally arranged, taken the photograph described in the included sensor energy adjust automatically of the camera
As the direction of head, camera is made to keep horizontality.At this point, the scanning object be in the camera it is horizontal
State, therefore the two is parallel, therefore, be can ensure that when scanning object is shot without deformation.
S205, start the camera and control the camera according to the acquisition parameters to the scanning object into
Row shooting.
On the basis of embodiment one, the camera using the mobile terminal is the present embodiment as rotatable camera
Example, using the direction of rotatable camera described in sensor adjust automatically, so that the rotatable camera and the scanning mesh
It is parallel to mark object, to ensure to scan without deformation when object is shot, sweeping for object equal proportion is scanned with described to obtain
Trace designs picture.
Embodiment three
Fig. 3 is the structure diagram of the scan image acquisition device described in the embodiment of the present invention three, as shown in figure 3, this implementation
Example described in scan image acquisition device include：
Instruction detection unit 301, for detecting the instruction for acting on mobile terminal；
If distance acquiring unit 302 obtains the camera of the mobile terminal for detecting preset scan instruction
The distance between described scanning object；
Acquisition parameters computing unit 303, the acquisition parameters for calculating the camera according to the distance；
Shooting unit 304, for starting the camera and controlling the camera according to the acquisition parameters to described
Scanning object is shot, to obtain the scan image with the scanning object equal proportion.
Further, the distance acquiring unit 302 is specifically used for：
Rangefinder is obtained between the scanning object by the rangefinder of the preset number on the mobile terminal
Distance；
If the distance acquired in the rangefinder of the preset number is equal, the movement is obtained according to the equal distance
The distance between the camera of terminal and the scanning object；
Otherwise the mobile terminal is adjusted to the state parallel with the scanning object by prompt user, and is repeated
The above operation.
Further, the preset number is equal to 3.
Further, the acquisition parameters computing unit 303 is specifically used for：The camera is calculated according to the distance
Focal length, so that the focal length is equal to the distance between the camera and the scanning object, to realize that equal proportion is shot.
Scan image acquisition device provided in this embodiment can perform the scan image that the embodiment of the present invention one is provided and obtain
Method is taken, has the corresponding function module of execution method and advantageous effect.
Example IV
The present embodiment illustrates the technical side of the present embodiment so that the camera of the mobile terminal is rotatable camera as an example
Case, Fig. 4 is the structure diagram of the scan image acquisition device described in the present embodiment, as shown in figure 4, the scanning described in the present embodiment
Image acquiring device includes：
Instruction detection unit 401, for detecting the instruction for acting on mobile terminal；
If distance acquiring unit 402 obtains the camera of the mobile terminal for detecting preset scan instruction
The distance between described scanning object；
Acquisition parameters computing unit 403, the acquisition parameters for calculating the camera according to the distance；
Parallel adjustment unit 404, for starting the camera and controlling the camera according to the acquisition parameters
Before being shot to the scanning object, using the direction of rotatable camera described in sensor adjust automatically, so that institute
It is parallel with the scanning object to state rotatable camera；
Shooting unit 405, for starting the camera and controlling the camera according to the acquisition parameters to described
Scanning object is shot, to obtain the scan image with the scanning object equal proportion.
Further, the acquisition parameters computing unit 403 is specifically used for：The camera is calculated according to the distance
Focal length, so that the focal length is equal to the distance between the camera and the scanning object.
Scan image acquisition device provided in this embodiment can perform two institute of the embodiment of the present invention one and the embodiment of the present invention
The scan image acquisition methods of offer have the corresponding function module of execution method and advantageous effect.
Above example provide technical solution in all or part of content can be realized by software programming, software
Program is stored in the storage medium that can be read, and storage medium is for example：Hard disk, CD in computer or floppy disk.
Note that above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The present invention is not limited to specific embodiments described here, can carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out to the present invention by above example
It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also
May include other more equivalent embodiments, and the scope of the present invention is determined by scope of the appended claims.
Claims (8)
1. a kind of scan image acquisition methods, which is characterized in that including：
Detection acts on the instruction of mobile terminal；
If detecting preset scan instruction, rangefinder is obtained by the rangefinder of the preset number on the mobile terminal and is arrived
Scan the distance between object；
If the distance acquired in the rangefinder of the preset number is equal, the mobile terminal is obtained according to the equal distance
Camera and the distance between the scanning object；
Otherwise the mobile terminal is adjusted to the state parallel with the scanning object by prompt user, and is repeated above
Operation；
The acquisition parameters of the camera are calculated according to the distance；
Start the camera and control the camera and the scanning object is shot according to the acquisition parameters, with
Obtain the scan image with the scanning object equal proportion.
2. scan image acquisition methods according to claim 1, which is characterized in that the preset number is equal to 3.
3. scan image acquisition methods according to claim 1, which is characterized in that the camera of the mobile terminal is can
Rotating camera；
The scanning object is shot according to the acquisition parameters starting the camera and controlling the camera
Further include before：Using the direction of rotatable camera described in sensor adjust automatically, so that the rotatable camera and institute
It is parallel to state scanning object.
4. according to any scan image acquisition methods of claim 1-3, which is characterized in that calculate institute according to the distance
The operation for stating the acquisition parameters of camera specifically includes：The focal length that the camera is calculated according to the distance, so that the coke
Away from equal to the distance between the camera and the scanning object.
5. a kind of scan image acquisition device, which is characterized in that including：
Instruction detection unit, for detecting the instruction for acting on mobile terminal；
If distance acquiring unit obtains camera and the scanning of the mobile terminal for detecting preset scan instruction
The distance between object；
Wherein, the distance acquiring unit is specifically used for：
Rangefinder is obtained to scanning the distance between object by the rangefinder of the preset number on the mobile terminal；
If the distance acquired in the rangefinder of the preset number is equal, the mobile terminal is obtained according to the equal distance
Camera and the distance between the scanning object；
Otherwise the mobile terminal is adjusted to the state parallel with the scanning object by prompt user, and is repeated above
Operation；
Acquisition parameters computing unit, the acquisition parameters for calculating the camera according to the distance；
Shooting unit, for starting the camera and controlling the camera according to the acquisition parameters to the scanning target
Object is shot, to obtain the scan image with the scanning object equal proportion.
6. scan image acquisition device according to claim 5, which is characterized in that the preset number is equal to 3.
7. scan image acquisition device according to claim 5, which is characterized in that the camera of the mobile terminal is can
Rotating camera；
Described device further includes parallel adjustment unit, for starting the camera and controlling the camera according to the bat
It takes the photograph before parameter shoots the scanning object, using the direction of rotatable camera described in sensor adjust automatically,
So that the rotatable camera is parallel with the scanning object.
8. according to any scan image acquisition device of claim 5-7, which is characterized in that the acquisition parameters calculate single
Member is specifically used for：The focal length of the camera is calculated according to the distance so that the focal length be equal to the camera with it is described
Scan the distance between object.
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| CN108282395B (en) * | 2015-04-30 | 2020-12-22 | Oppo广东移动通信有限公司 | Message interaction method and related device, communication system and computer storage medium |
| CN104850835A (en) * | 2015-05-13 | 2015-08-19 | 杭州朗和科技有限公司 | Scanning method and scanning terminal |
| CN106331463B (en) * | 2015-06-26 | 2019-05-14 | 小米科技有限责任公司 | Camera focal length amplification method and device |
| CN105611151A (en) * | 2015-12-17 | 2016-05-25 | 深圳市金立通信设备有限公司 | Terminal control method and terminal |
| CN106899800B (en) * | 2016-06-28 | 2020-02-14 | 阿里巴巴集团控股有限公司 | Camera focusing method and device and mobile terminal equipment |
| CN106454068B (en) * | 2016-08-30 | 2019-08-16 | 广东小天才科技有限公司 | Method and device for quickly acquiring effective image |
| CN108282596B (en) * | 2018-03-02 | 2020-06-02 | 合肥京东方光电科技有限公司 | Scanning screen and scanning equipment |
| CN108650431B (en) * | 2018-05-14 | 2021-01-15 | 联想(北京)有限公司 | Shooting control method and device and electronic equipment |
| CN110213456B (en) * | 2019-06-10 | 2021-07-27 | Oppo广东移动通信有限公司 | Scanned document correction method, electronic device, and computer-readable storage medium |
| CN110996030A (en) * | 2019-12-20 | 2020-04-10 | Tcl移动通信科技（宁波）有限公司 | Video generation method and device, storage medium and terminal equipment |
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