CN107564050A - Control method, device and terminal device based on structure light - Google Patents
Control method, device and terminal device based on structure light Download PDFInfo
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Abstract
The invention discloses a kind of control method based on structure light, device and terminal device, the method based on structure light includes：The distance between object and camera are detected using structure light；It is controlled according to the distance pair detected with apart from corresponding structure light application, wherein, each structure light, which is applied, has its corresponding quantity of light source.The control method based on structure light, device and the terminal device of the embodiment of the present invention, the distance between object and camera are detected using structure light, and be controlled according to the distance pair detected with apart from corresponding structure light application, application is wider, improves user experience.
Description
Technical field
The present invention relates to technical field of information processing, more particularly to a kind of control method based on structure light, device and end
End equipment.
Background technology
Structure light is to project grating or line source etc. on measured object, and distortion, is demodulated tested according to caused by them
The three-dimensional information of thing.At present, structure light is mainly used in the professional domains such as three-dimensional drawing, modeling, and the scope of application is small.
The content of the invention
The present invention provides a kind of control method based on structure light, device and terminal device, to solve in the prior art should
With scope it is small the problem of.
The embodiment of the present invention provides a kind of control method based on structure light, including：Using structure light detection object with
The distance between camera；It is controlled according to the distance pair detected structure light application corresponding with the distance, its
In, each structure light, which is applied, has its corresponding quantity of light source.
Another embodiment of the present invention provides a kind of control device based on structure light, including：Detection module, for utilizing knot
Structure light detects the distance between object and camera；Control module, for according to the distance pair that detects with it is described away from
It is controlled from corresponding structure light application, wherein, each structure light, which is applied, has its corresponding quantity of light source.
A further embodiment of the present invention provides a kind of non-transitorycomputer readable storage medium, is stored thereon with computer journey
Sequence, the control based on structure light as described in first aspect present invention embodiment is realized when the computer program is executed by processor
Method.
Further embodiment of this invention provides a kind of terminal device, including memory, processor and is stored in the memory
Computer program that is upper and can running on the processor, the control based on structure light described in first aspect present invention embodiment
Method processed.
Technical scheme provided in an embodiment of the present invention can include the following benefits：
Using structure light detect the distance between object and camera, and according to the distance pair detected with it is described
Structure light application corresponding to distance is controlled, and application is wider, improves user experience.
The additional aspect of the present invention and advantage will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
Of the invention above-mentioned and/or additional aspect and advantage will become from the following description of the accompanying drawings of embodiments
Substantially and it is readily appreciated that, wherein：
Fig. 1 is the flow chart of the control method according to an embodiment of the invention based on structure light；
Fig. 2 is the schematic diagram of a scenario of structural light measurement according to an embodiment of the invention；
Fig. 3 is the structured flowchart of the control device according to an embodiment of the invention based on structure light；
Fig. 4 is the structural representation of terminal device according to an embodiment of the invention；
Fig. 5 is the schematic diagram of image processing circuit according to an embodiment of the invention.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings the control method based on structure light, device and the terminal device of the embodiment of the present invention are described.
Fig. 1 is the flow chart of the control method according to an embodiment of the invention based on structure light.
As shown in figure 1, being somebody's turn to do the control method based on structure light includes：
S101, the distance between object and camera are detected using structure light.
In one embodiment of the invention, can the threedimensional model based on structure photogenerated object, then according to three-dimensional
Model obtains the distance between object and camera.
Specifically, can be to object projective structure light, and the structure light image by object is obtained, then according to structure
Light image generates threedimensional model.Wherein, generating threedimensional model according to structure light image may include：Deformed in demodulation structure light image
Phase information corresponding to the pixel of position, phase information is converted into elevation information, then obtains the three of user according to elevation information
Tie up avatar model.
Wherein, structure light may include various ways, as laser stripe, Gray code, sine streak or, non-homogeneous speckle
Deng.
More it is apparent from order that obtaining those skilled in the art, how the three of object is gathered according to structure light
The relevant information of dimension module, illustrate its concrete principle by taking a kind of widely used fringe projection technology as an example below.Using
When area-structure light projects, as shown in Fig. 2 producing sine streak by computer programming, the sine streak is passed through into projection
Equipment is projected to object, the degree of crook modulated using camera shooting striped by object, is demodulated the curved stripes and is obtained phase
Position, then phase is converted into height.Certainly wherein crucial point is exactly the registration of system, including camera sets with projection
Standby registration, is otherwise more likely to produce error.Specifically, the phase of the phase of curved stripes and reference stripe can be subtracted each other
To phase difference, the phase difference then characterizes elevation information of the measured object with respect to the plane of reference, then substitutes into phase and high-degree of conversion formula,
So as to obtain the threedimensional model of object.It should be appreciated that in actual applications, according to the difference of concrete application scene, sheet
Structure light employed in inventive embodiments can also be other arbitrary graphic patterns in addition to above-mentioned striped.
It should be noted that according to the difference of application scenarios, three can be obtained based on structure light image in different ways
Dimension module.Such as：Phase information corresponding to deformation position pixel in demodulation structure light image, phase information is converted into height and believed
Breath, the threedimensional model of object corresponding with structure light image is obtained according to elevation information.
S102, it is controlled according to the distance pair detected with apart from corresponding structure light application.
Wherein, each structure light, which is applied, has its corresponding quantity of light source.
In one embodiment of the invention, when the distance detected be first apart from when, utilize structure light control screen
Put out screen.Wherein, corresponding quantity of light source is the first numerical value.Such as：When the distance for detecting user side face and camera is
At 2-5 centimetres, it may be determined that user calls, and now puts out screen using structure light control screen.Wherein, consumed to save
Electricity, only need the light source of the structure light of 20 or so that the function can be achieved.
Specifically, can be to shooting main body projective structure light, and obtain the structure light image by shooting main body, then basis
Structure light image generates threedimensional model.The threedimensional model of shooting main body is being obtained, that is, is obtaining the three-dimensional coordinate letter of shooting main body
After breath, the locus of each pixel of shooting main body can be calculated according to the threedimensional model of shooting main body, and according to shooting
The locus of the pixel of main body and the positional information calculation of camera go out to shoot the distance between main body and camera letter
Breath.Wherein, range information can be the average distance between the positional information of each pixel and camera that shoot main body.
A pixel closest with the positional information of camera can be selected, the distance between the pixel and camera are believed
Breath is as shooting the distance between main body and camera information.Finally, screen can be put out according to distance controlling screen, can be made more accurate
Screen control really is put out, saves electricity, improves user experience.
In another embodiment of the present invention, when the distance detected is second distance, taken the photograph using structure photocontrol
As head is focused.Wherein, corresponding quantity of light source is second value.Such as：When detecting measured object and camera
When distance is 10 cm, it may be determined that user just in shooting image, is now focused using structure photocontrol camera.
Wherein, for the amount of saving energy, only need the light source of the structure light of 100 or so that the function can be achieved.
Specifically, can be to shooting main body projective structure light, and obtain the structure light image by shooting main body, then basis
Structure light image generates threedimensional model.The threedimensional model of shooting main body is being obtained, that is, is obtaining the three-dimensional coordinate letter of shooting main body
After breath, the locus of each pixel of shooting main body can be calculated according to the threedimensional model of shooting main body, and according to shooting
The locus of the pixel of main body and the positional information calculation of camera go out to shoot the distance between main body and camera letter
Breath.Wherein, range information can be the average distance between the positional information of each pixel and camera that shoot main body.
A pixel closest with the positional information of camera can be selected, the distance between the pixel and camera are believed
Breath is as shooting the distance between main body and camera information.Finally, can be focused according to distance controlling camera.Wherein,
It can obtain with apart from corresponding focusing motor position, then controlling camera to be transferred to focusing motor position, to realize focusing.Example
Such as：Can according to the distance that pre-saves and the corresponding relation of focusing motor position, obtain with apart from corresponding focusing motor position.
It should be noted that distance and the corresponding relation of focusing motor position are demarcated in advance, by pre-saving distance and focusing
The corresponding relation of motor position, it can cause after the distance between camera and shooting main body is obtained by structure light, can be fast
Speed obtains motor position corresponding with respective distances, so as to improve focusing speed.Again for example：By distance input to default mould
Type, with by preset model determine with apart from corresponding focusing motor position.Wherein, preset model refers to be determined according to distance
Go out the model of focusing motor position.Again for example：According to preset function and distance, it is determined that with apart from corresponding focusing motor position.
Wherein, preset function is the function for calculating focusing motor position according to distance.Using structure light, it can realize and shooting is led
The accurate focusing of body, it is more intelligent, meet user and shoot demand.
In yet another embodiment of the present invention, when the distance detected be the 3rd apart from when, used using structure light
Family authentication.Wherein, corresponding quantity of light source is third value.Such as：When detect measured object and camera away from
From for 30-80 centimetres when, it may be determined that user need carry out authentication, now using structure light carry out subscriber authentication.
Wherein, in order to ensure security and accuracy, the light source of the structure light of 1000 or so is now needed to realize the function.
Specifically, the application scenarios of authentication information are rapid payments.User is in shopping, it is necessary to carry out payment behaviour
Make, the relevant device of payment can generate the structure light image by active user's face modulation to user's face projective structure light.
Phase information corresponding to demodulating the structure light image, obtain the threedimensional model of user's face.Then, from the three-dimensional mould of user's face
Face feature information corresponding to extraction is uploaded to database, the sample characteristics letter of the default 3 d model library of database application in type
Breath matches to face feature information.After the match is successful, it may be verified that user identity is legal, finally deducts and is tied up with user identity
The money of account in fixed bank card.If matching is unsuccessful, refuse this payment.User identity is tested using structure light
Card, can effectively improve the accuracy rate of authentication, and authentication mode is more rich.
The control method based on structure light of the embodiment of the present invention, detected using structure light between object and camera
Distance, and be controlled according to the distance pair detected with apart from corresponding structure light application, application is wider, improves user
Usage experience.
In order to realize above-described embodiment, the invention also provides a kind of control device based on structure light, Fig. 3 is according to this
The structured flowchart of the control device based on structure light of invention one embodiment, as shown in figure 3, the device includes detection module
100 and control module 200.
Wherein, detection module 100, for utilizing structure light detection the distance between object and camera.
Control module 200, for being controlled according to the distance pair detected with apart from corresponding structure light application.Its
In, each structure light, which is applied, has its corresponding quantity of light source.
It should be noted that the foregoing explanation to the control method based on structure light, is also applied for implementation of the present invention
The control device based on structure light of example, unpub details in the embodiment of the present invention, will not be repeated here.
The control device based on structure light of the embodiment of the present invention, detected using structure light between object and camera
Distance, and be controlled according to the distance pair detected with apart from corresponding structure light application, application is wider, improves user
Usage experience.
In order to realize above-described embodiment, the present invention also proposes a kind of non-transitorycomputer readable storage medium, deposited thereon
Computer program is contained, can be realized when the computer program is executed by processor such as previous embodiment based on structure light
Control method.
In order to realize above-described embodiment, the invention also provides a kind of terminal device.
As shown in figure 4, the terminal device includes：Processor 41, memory 42 and image processing circuit 43.
Wherein, memory 42 is used to store executable program code；What processor 41 was stored by reading in memory 42
Executable program code, and image processing circuit 43 are handled image, to realize as put out screen control in previous embodiment
Method.
Specifically, image processing circuit 43 can utilize hardware and/or component software to realize, it may include define ISP
The various processing units of (Image Signal Processing, picture signal processing) pipeline.
Fig. 5 is the schematic diagram of image processing circuit in one embodiment.As shown in figure 5, for purposes of illustration only, only show and this
The various aspects of the related image processing techniques of inventive embodiments.
As shown in figure 5, image processing circuit includes imaging device 510, ISP processors 530 and control logic device 540.Into
As equipment 510 may include there is one or more lens 512, the camera of imaging sensor 514 and structured light projector 516.
Structured light projector 516 is by structured light projection to measured object.Wherein, the structured light patterns can be laser stripe, Gray code, sine
Striped or, speckle pattern of random alignment etc..Imaging sensor 514 catches the structure light image that projection is formed to measured object,
And send structure light image to ISP processors 530, acquisition measured object is demodulated to structure light image by ISP processors 530
Depth information.Meanwhile imaging sensor 514 can also catch the color information of measured object.It is of course also possible to by two images
Sensor 514 catches the structure light image and color information of measured object respectively.
Wherein, by taking pattern light as an example, ISP processors 530 are demodulated to structure light image, are specifically included, from this
The speckle image of measured object is gathered in structure light image, by the speckle image of measured object with reference speckle image according to pre-defined algorithm
View data calculating is carried out, each speckle point for obtaining speckle image on measured object dissipates relative to reference to the reference in speckle image
The displacement of spot.The depth value of each speckle point of speckle image is calculated using trigonometry conversion, and according to the depth
Angle value obtains the depth information of measured object.
It is, of course, also possible to obtain the depth image by the method for binocular vision or based on jet lag TOF method
Information etc., is not limited herein, as long as can obtain or belong to this by the method for the depth information that measured object is calculated
The scope that embodiment includes.
After the color information that ISP processors 530 receive the measured object that imaging sensor 514 captures, it can be tested
View data corresponding to the color information of thing is handled.ISP processors 530 are analyzed view data can be used for obtaining
It is determined that and/or imaging device 510 one or more control parameters image statistics.Imaging sensor 514 may include color
Color filter array (such as Bayer filters), imaging sensor 514 can obtain to be caught with each imaging pixel of imaging sensor 514
Luminous intensity and wavelength information, and provide one group of raw image data being handled by ISP processors 530.
ISP processors 530 handle raw image data pixel by pixel in various formats.For example, each image pixel can
Bit depth with 8,10,12 or 14 bits, ISP processors 530 can be carried out at one or more images to raw image data
Reason operation, image statistics of the collection on view data.Wherein, image processing operations can be by identical or different bit depth
Precision is carried out.
ISP processors 530 can also receive pixel data from video memory 520.Video memory 520 can be memory device
The independent private memory in a part, storage device or electronic equipment put, and may include DMA (Direct Memory
Access, direct direct memory access (DMA)) feature.
When receiving raw image data, ISP processors 530 can carry out one or more image processing operations.
After ISP processors 530 get color information and the depth information of measured object, it can be merged, obtained
3-D view.Wherein, can be extracted by least one of appearance profile extracting method or contour feature extracting method corresponding
The feature of measured object.Such as pass through active shape model method ASM, active appearance models method AAM, PCA PCA, discrete
The methods of cosine transform method DCT, the feature of measured object is extracted, is not limited herein.It will be extracted respectively from depth information again
The feature of measured object and feature progress registration and the Fusion Features processing that measured object is extracted from color information.Herein refer to
Fusion treatment can be the feature that will be extracted in depth information and color information directly combination or by different images
Middle identical feature combines after carrying out weight setting, it is possibility to have other amalgamation modes, finally according to the feature after fusion, generation
3-D view.
The view data of 3-D view can be transmitted to video memory 520, to carry out other place before shown
Reason.ISP processors 530 from the reception processing data of video memory 520, and to processing data carry out original domain in and RGB and
Image real time transfer in YCbCr color spaces.The view data of 3-D view may be output to display 560, so that user sees
See and/or further handled by graphics engine or GPU (Graphics Processing Unit, graphics processor).In addition,
The output of ISP processors 530 also can be transmitted to video memory 520, and display 560 can read from video memory 520 and scheme
As data.In one embodiment, video memory 520 can be configured as realizing one or more frame buffers.In addition, ISP
The output of processor 530 can be transmitted to encoder/decoder 550, so as to encoding/decoding image data.The view data of coding
It can be saved, and be decompressed before being shown in the equipment of display 560.Encoder/decoder 650 can be by CPU or GPU or association
Processor is realized.
The image statistics that ISP processors 530 determine, which can be transmitted, gives the unit of control logic device 540.Control logic device 540
It may include the processor and/or microcontroller for performing one or more routines (such as firmware), one or more routines can be according to connecing
The image statistics of receipts, determine the control parameter of imaging device 510.
It should be noted that the foregoing explanation to the control method embodiment based on structure light is also applied for the implementation
The terminal device of example, its realization principle is similar, and here is omitted.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be with office
Combined in an appropriate manner in one or more embodiments or example.In addition, in the case of not conflicting, the skill of this area
Art personnel can be tied the different embodiments or example and the feature of different embodiments or example described in this specification
Close and combine.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changed, replacing and modification.
Claims (12)
1. a kind of control method based on structure light, it is characterised in that the described method comprises the following steps：
The distance between object and camera are detected using structure light；
It is controlled according to the distance pair detected structure light application corresponding with the distance, wherein, each structure light
Using with its corresponding quantity of light source.
2. the method as described in claim 1, it is characterised in that using structure light detect between object and camera away from
From, including：
Threedimensional model based on object described in structure photogenerated；
According to the distance between object and camera described in the obtaining three-dimensional model.
3. method as claimed in claim 2, it is characterised in that the threedimensional model based on object described in structure photogenerated, bag
Include：
To the object projective structure light, and obtain the structure light image by the object；
The threedimensional model is generated according to the structure light image.
4. method as claimed in claim 3, it is characterised in that the threedimensional model, bag are generated according to the structure light image
Include：
Demodulate phase information corresponding to deformation position pixel in the structure light image；
The phase information is converted into elevation information；
The threedimensional model is obtained according to the elevation information.
5. the method as described in claim 1, it is characterised in that corresponding with the distance according to the distance pair detected
Structure light application is controlled, including：
When the distance detected be first apart from when, using structure light control screen put out screen, wherein, corresponding light source
Quantity is the first numerical value；Or
When the distance detected is second distance, focused using camera described in structure photocontrol, wherein, with it
Corresponding quantity of light source is second value；Or
When the distance detected be the 3rd apart from when, using structure light carry out subscriber authentication, wherein, it is corresponding
Quantity of light source is third value.
6. a kind of control device based on structure light, it is characterised in that described device includes：
Detection module, for utilizing structure light detection the distance between object and camera；
Control module, for being controlled according to the distance pair structure light application corresponding with the distance detected, its
In, each structure light, which is applied, has its corresponding quantity of light source.
7. device as claimed in claim 6, it is characterised in that the detection module, be used for：
Threedimensional model based on object described in structure photogenerated；
According to the distance between object and camera described in the obtaining three-dimensional model.
8. device as claimed in claim 7, it is characterised in that the detection module, be used for：
To the object projective structure light, and obtain the structure light image by the object；
The threedimensional model is generated according to the structure light image.
9. device as claimed in claim 8, it is characterised in that the detection module, be used for：
Demodulate phase information corresponding to deformation position pixel in the structure light image；
The phase information is converted into elevation information；
The threedimensional model is obtained according to the elevation information.
10. device as claimed in claim 6, it is characterised in that the control module, be used for：
When the distance detected be first apart from when, using structure light control screen put out screen, wherein, corresponding light source
Quantity is the first numerical value；Or
When the distance detected is second distance, focused using camera described in structure photocontrol, wherein, with it
Corresponding quantity of light source is second value；Or
When the distance detected be the 3rd apart from when, using structure light carry out subscriber authentication, wherein, it is corresponding
Quantity of light source is third value.
11. one or more includes the non-volatile computer readable storage medium storing program for executing of computer executable instructions, when the calculating
When machine executable instruction is executed by one or more processors so that the computing device such as any one of claim 1 to 5
The described control method based on structure light.
12. a kind of mobile terminal, including memory and processor, computer-readable instruction is stored in the memory, it is described
Instruction by the computing device when so that the computing device as any one of claim 1 to 5 based on structure
The control method of light.
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| CN201710677071.9A CN107564050B (en) | 2017-08-09 | 2017-08-09 | Control method and device based on structured light and terminal equipment |
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| CN108564033A (en) * | 2018-04-12 | 2018-09-21 | Oppo广东移动通信有限公司 | Safe verification method, device based on structure light and terminal device |
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| CN111882596B (en) * | 2020-03-27 | 2024-03-22 | 东莞埃科思科技有限公司 | Three-dimensional imaging method and device for structured light module, electronic equipment and storage medium |
| CN111880318A (en) * | 2020-05-09 | 2020-11-03 | 浙江水晶光电科技股份有限公司 | Structured light projector, three-dimensional imaging device and three-dimensional imaging method |
| CN111880318B (en) * | 2020-05-09 | 2022-07-05 | 东莞埃科思科技有限公司 | Structured light projector and three-dimensional imaging device |
| CN112395963A (en) * | 2020-11-04 | 2021-02-23 | 北京嘀嘀无限科技发展有限公司 | Object recognition method and device, electronic equipment and storage medium |
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