CN104090689B - A kind of method and system of mobile terminal and its interactive projection - Google Patents
A kind of method and system of mobile terminal and its interactive projection Download PDFInfo
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- CN104090689B CN104090689B CN201410301383.6A CN201410301383A CN104090689B CN 104090689 B CN104090689 B CN 104090689B CN 201410301383 A CN201410301383 A CN 201410301383A CN 104090689 B CN104090689 B CN 104090689B
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Abstract
The invention discloses a kind of mobile terminal and its method and systems of interactive projection, belong to technical field of mobile terminals.The method of the interactive projection is applied to mobile terminal, this method comprises: acquisition for mobile terminal mobile terminal is projected in the preview image on projection display apparatus；The screen of the preview image and mobile terminal that will acquire forms coordinate mapping；When mobile terminal collects the hot spot on projection display apparatus, the mapping point of screen corresponding with the coordinate of hot spot is inquired；Execute the action-item on mobile terminal screen with the mapping point corresponding position inquired.It not only can use mobile terminal the invention enables user to project, the display of the screen of mobile terminal can also be manipulated by the picture of operation projection, and then change the display of projected picture, overcome the defect at high cost and inconvenient to carry using special thermal camera bring.
Description
Technical field
The present invention relates to technical field of mobile terminals, and in particular to a kind of method of mobile terminal and its interactive projection and
System.
Background technique
As smart phone is in the continuous development of display technology and photography technology.The prior art can be by smart phone screen
The display content of curtain projects to other large-screen display equipments, such as wifi display, the technologies such as MHL.By manipulating intelligent hand
The input equipment of machine obtains the experience such as good audio-visual amusement.
But user can not manipulate the large-screen display equipment being projected, as an application in smart phone projects to
It is shown on large screen, the application can only be manipulated by the screen of touch intelligent mobile phone, and can not directly touch large screen
To be manipulated.Though having the mature application of interactive projection in computer field, majority of case is needed using special red
Outer video camera not as good as smart phone low cost and is convenient for carrying.Meanwhile in mobile phone end, since the camera of camera is abnormal
Become and survey light requirement, precision and difficulty to positioning have higher requirement, and current technology also cannot achieve.
Summary of the invention
The present invention provides the method and system of a kind of mobile terminal and its interactive projection, to reach by projected picture
Operation so that manipulate mobile terminal purpose, overcome it is above-mentioned using special thermal camera bring it is at high cost and inconvenient
The defect of carrying.
The technical solution that the present invention solves above-mentioned technical problem is as follows.
According to an aspect of the present invention, a kind of method of the interactive projection provided, this method are applied to mobile terminal,
This method comprises: acquisition for mobile terminal mobile terminal is projected in the preview image on projection display apparatus；The preview that will acquire
The screen of image and mobile terminal forms coordinate mapping；When mobile terminal collects the hot spot on projection display apparatus, inquiry
The mapping point of screen corresponding with the coordinate of hot spot；Execute position corresponding with the mapping point inquired on mobile terminal screen
The action-item set.
Preferably, above-mentioned hot spot is the visible light spot that laser pen issues, and is shown for above-mentioned mobile terminal acquired projections
Hot spot in equipment, this method further include: the camera of mobile terminal is acquired through on the filtered projection display apparatus of optical filter
Preview image；Point most bright on preview image is obtained, and using the most bright point as collected hot spot.
Preferably, this method further include: established and distorted by the mapping relations of the point on screen and the point on preview image
Model；Utilize the distortion part in distortion model correction preview image.
Preferably, include: with the action-item of the mapping point corresponding position inquired on above-mentioned execution mobile terminal screen
Open the application program on mobile terminal screen with the mapping point corresponding position inquired.
According to another aspect of the present invention, a kind of mobile terminal provided, the mobile terminal include: that preview image obtains
Module, the preview image being projected in for acquisition for mobile terminal mobile terminal on projection display apparatus；Coordinate mapping module is used for
The screen of the preview image and mobile terminal that will acquire forms coordinate mapping；Hot spot acquisition module, for being adopted when mobile terminal
When collecting the hot spot on projection display apparatus, the mapping point of screen corresponding with the coordinate of hot spot is inquired；Execution module is used
In the action-item for executing the mapping point corresponding position on mobile terminal screen and inquired.
Preferably, above-mentioned mobile terminal further include: filtering module, the camera for mobile terminal are acquired through optical filter mistake
The preview image on projection display apparatus after filter；Most bright spot obtains module, for obtaining point most bright on preview image, and will
The most bright point is as collected hot spot.
Preferably, above-mentioned coordinate mapping module further include: distortion model establishes module, for by the point on screen and in advance
The mapping relations for the point look on image establish distortion model；Rectification module, for using in distortion model correction preview image
Distortion part.
According to a further aspect of the invention, a kind of system of the interactive projection provided, the system include: above-mentioned shifting
Dynamic terminal, the mobile terminal are equipped with the interface of projection display apparatus；Projection display apparatus is connect with mobile terminal, for showing
Show preview image and light spot received；Laser pen, for issuing the hot spot of visible light.
Preferably, the system of above-mentioned a kind of interactive projection further include: optical filter, before being located at the camera of mobile terminal
Face is decayed for the light intensity to the camera for entering mobile terminal.
The present invention provides a kind of mobile terminal and its method and systems of interactive projection, so that user not only can benefit
It is projected with mobile terminal, the display of the screen of mobile terminal can also be manipulated by the picture of operation projection, and then changed
The display of projected picture.
Detailed description of the invention
Fig. 1 is the flow chart according to the interactive projection method of one embodiment of the present of invention；
Fig. 2 is the flow chart according to the acquisition methods of the hot spot of one embodiment of the present of invention；
Fig. 3 is the exemplary block diagram according to the mobile terminal of one embodiment of the present of invention；
Fig. 4 is the exemplary block diagram according to the coordinate mapping module of one embodiment of the present of invention；
Fig. 5 is the structural schematic diagram according to the interactive projection system of one embodiment of the present of invention.
Specific embodiment
The principle and features of the present invention will be described below with reference to the accompanying drawings, and the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the invention.
Fig. 1 is to be described according to the flow chart of the interactive projection method of one embodiment of the present of invention below with reference to Fig. 1
The flow chart of interactive projection method according to an embodiment of the invention, this method are applied to mobile terminal, and the movement is whole
End includes but is not limited to mobile phone, tablet computer and other portable electronic devices, as shown in Figure 1, this method includes following step
Suddenly.
S10, acquisition for mobile terminal mobile terminal are projected in the preview image on projection display apparatus.
Wherein, above-mentioned projection display apparatus can be large size TV machine display, be also possible to large screen projector.In
When obtaining above-mentioned preview image, it is also necessary to which the position for adjusting mobile terminal enables the camera preview completely of mobile terminal to throw
Shadow shows the image in equipment and obtains the image, so that the preview image got is that mobile terminal is projected in Projection Display and sets
Standby upper whole pictures.The content that the mobile terminal screen is shown can be output to Projection Display by the interface of mobile terminal
In equipment.
The screen of S20, the preview image that will acquire and mobile terminal form coordinate mapping.
S30, when mobile terminal collects the hot spot on projection display apparatus, inquire corresponding with the coordinate of hot spot screen
The mapping point of curtain.
S40, the reported event for triggering mobile phone driver execute the mapping point pair on mobile terminal screen and inquired
Answer the action-item of position.
It wherein, include: to beat with the action-item of the mapping point corresponding position inquired on above-mentioned execution mobile terminal screen
Open the application program on mobile terminal screen with the mapping point corresponding position inquired.
Wherein, above-mentioned hot spot is the visible light spot that laser pen issues.
In view of the camera distortion of mobile phone camera, shooting preview image middle position is approximately considered undistorted, and corner
There are distortion, the method for above-mentioned interactive projection can also include:
Distortion model is established by the mapping relations of the point on screen and the point on preview image；
Utilize the distortion part in distortion model correction preview image.
Above-mentioned distortion model and according on distortion model correcting image distortion part (corner of preview image) scheme
It is known algorithm, one of inventive point of the invention is to have used the technique algorithm on mobile terminals, technique algorithm tool
Body is explained are as follows:
(1) the pointer position option under mobile terminal development mode is opened, and scales the page, clicks mobile phone screen with thin pen
Upper 9 palace trrellis diagram marks by center.At this point, mobile phone can report original graph target coordinate position, while in mobile phone shooting preview circle
Face, corresponding coordinates of icon position can also be shown by clicking icon, thus can produce 9 groups of corresponding coordinates.
(2) equation about homography matrix is set up by the corresponding relationship of 9 groups of coordinates, then the corresponding of multiple coordinates is closed
The equation group of homography matrix can be obtained in system, carries out singular value decomposition to equation group and acquires homography matrix.
(3) by the inverse transformation of homography matrix, can calculate the coordinate of mobile phone screen to mobile phone shooting preview image without
The coordinate of distortion part.
(4) other 9 groups of mobile phones corner location coordinate is chosen according to step (1), forms 9 groups of mobile phone shooting preview pattern distortions
The coordinate of partial coordinate and corresponding mobile phone screen.
(5) suitable camera distortion model is established by corresponding relationship to shoot mobile terminal using distortion model parameter
Preview image in the coordinate of distortion part be mapped to the distortionless coordinate of preview image.
(6) the mobile phone shooting preview image of the coordinate and step (5) generation that utilize the mobile phone screen of step (4) is distortionless
Coordinate and recalculate homography matrix described in step (3).
(7) it repeats the above steps repeatedly, chooses more accurately parameter value, more accurately parameter value can be to acquire for this
Multiple groups parameter value average value.
Fig. 2 is according to the flow chart of the acquisition methods of the hot spot of one embodiment of the present of invention, as shown in Fig. 2, above-mentioned mutual
The method of formula projection further includes the acquisition methods of hot spot, the acquisition methods of the hot spot the following steps are included:
The camera acquisition of S50, mobile terminal are through the preview image on the filtered projection display apparatus of optical filter.
S60, point most bright on preview image is obtained, and using the most bright point as collected hot spot.
After the light of optical filter decaying enters camera, on preview image, local brightness pointed by laser pen
Highest.By the independent light measuring function of smart phone camera application software, survey luminous point is locked in the most bright light of laser irradiation
On source, makes the place being directed toward on image in addition to laser pen, be all black elsewhere.It in this way can be very by image processing techniques
Readily find coordinate of the corresponding hot spot on preview image.
Fig. 3 is to be retouched according to the exemplary block diagram of the mobile terminal of one embodiment of the present of invention below according to Fig. 3
Mobile terminal 3 according to an embodiment of the invention is stated, as shown in figure 3, the mobile terminal 3 includes:
Preview image obtains module 01, the preview being projected on projection display apparatus for acquisition for mobile terminal mobile terminal
Image；
Coordinate mapping module 02, the screen of preview image and mobile terminal for will acquire form coordinate mapping；
Hot spot acquisition module 03, for when mobile terminal collects the hot spot on projection display apparatus, inquiry and hot spot
The corresponding screen of coordinate mapping point；
Execution module 04, for executing the action-item on mobile terminal screen with the mapping point corresponding position inquired.
Wherein, which can also include:
Filtering module, the camera for mobile terminal are acquired through the preview on the filtered projection display apparatus of optical filter
Image；
Most bright spot obtains module, for obtaining point most bright on preview image, and using the most bright point as collected
Hot spot.
Fig. 4 is the exemplary block diagram according to the coordinate mapping module of one embodiment of the present of invention, as shown in figure 4,
Above-mentioned coordinate mapping module includes:
Distortion model establishes module 05, abnormal for being established by the mapping relations of the point on screen and the point on preview image
Varying model；
Rectification module 06, for utilizing the distortion part in distortion model correction preview image.
Above-mentioned distortion model is the side for the homography matrix established by preview image point corresponding on mobile terminal screen
Journey group, the homography matrix acquired calculate the coordinate of mobile whole screen to the five of preview image by the inverse transformation of homography matrix
Fig. 5 is according to the structural schematic diagram of the interactive projection system of one embodiment of the present of invention, friendship as shown in Figure 5
Mutual formula optical projection system, which includes:
Above-mentioned mobile terminal 3, the mobile terminal 3 are equipped with the interface of projection display apparatus；
Projection display apparatus 1 is connect with mobile terminal 3, for showing preview image and light spot received A；
Laser pen 4, for issuing the hot spot A of visible light.
Wherein, which can also include the optical filter 2 being located at before the camera of mobile terminal, for moving to entrance
The light intensity of the camera of dynamic terminal is decayed.
Before above-mentioned optical filter 2 is semi-transparent optical filter and is placed in camera, for the intensity of illumination for entering camera that decays.
The main function of above-mentioned optical filter is the intensity of illumination that decaying enters camera.When intensity of illumination reaches certain value, camera shooting
Head sampled value levels off to saturation, is not further added by, so that the strong light in part of screen output and the intensity of illumination of laser pen output sample
Value is the same.In addition after optical filter, the intensity of illumination into camera has a decaying, and the strongest light of screen output is not yet
Tend to be saturated again, and after the intensity of illumination of laser pen output is even across decaying, also level off to saturation value.In this way convenient for intelligent hand
Generator terminal extracts beam pattern value, carries out coordinate setting.
Wherein, the interface of above-mentioned projection display apparatus is wifi display interface or slimport interface.The interface
The screen display content of mobile terminal is output to large screen projection to show in equipment.The large-screen display equipment can be big ruler
Very little television display or large screen projector.Above-mentioned laser pen is used to indicate the content on projection display apparatus, big
Hot spot is formed on screen, while according to light on and off and the length of lighting time, simulating the touch operation to viewing area.Such as it can be with
Default when detecting the lighting time in a certain position is 2~3 seconds, the position is clicked in expression, and it is bright to be preset in a certain position
When the lamp time is 3 seconds or more, indicate to double-click the position.
The present invention calibrates the camera distortion of the camera of mobile terminal, improves positioning accuracy, introduces simultaneously
The independent shooting function for surveying light of smart phone carries out auxiliary positioning, reduces the positioning difficulty of image procossing.In existing movement
Under the experience of the projection of terminal, richer interaction and operating function are increased, while cooperating the application journey of intelligent mobile terminal
Sequence, such as document writing, video display, information storage function, have better experience in occasions such as teaching, training, meetings, mention
High interactivity between user and smart phone and large-screen display equipment.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of method of interactive projection, which is characterized in that this method is applied to mobile terminal, this method comprises:
Mobile terminal described in the acquisition for mobile terminal is projected in the preview image on projection display apparatus；
The screen of the preview image and the mobile terminal that will acquire forms coordinate mapping；
When the mobile terminal collects the hot spot on the projection display apparatus, inquire corresponding with the coordinate of the hot spot
Screen mapping point；
Execute the action-item on the mobile terminal screen with the mapping point corresponding position inquired；
The hot spot in equipment, this method are shown for the mobile terminal acquired projections further include:
The camera of the mobile terminal is acquired through the preview image on the filtered projection display apparatus of optical filter；
Point most bright on the preview image is obtained, and using the most bright point as the collected hot spot；
The screen of the preview image that will acquire and the mobile terminal forms coordinate mapping
Pointer position option under S1, opening mobile terminal development mode, and the page is scaled, mobile terminal screen is clicked with thin pen
Upper 9 palace trrellis diagram marks by center；At this point, mobile terminal can report original graph target coordinate position, while being clapped in mobile terminal
Preview interface is taken the photograph, corresponding coordinates of icon position can also be shown by clicking icon, thus generate 9 groups of corresponding coordinates；
S2, the equation about homography matrix is set up by the corresponding relationship of 9 groups of coordinates, is obtained according to the corresponding relationship of multiple coordinates
To the equation group of homography matrix, singular value decomposition is carried out to equation group and acquires homography matrix；
S3, the inverse transformation by homography matrix, calculate the coordinate of mobile terminal screen to mobile terminal shooting preview image without
The coordinate of distortion part；
S4, other 9 groups of mobile terminals corner location coordinate is chosen according to step S1, forms 9 groups of mobile terminal shooting preview images
Distort coordinate and the coordinate of corresponding mobile terminal screen of part；
S5, suitable camera distortion model is established by corresponding relationship, is shot mobile terminal using distortion model parameter pre-
The distort coordinate of part look in image is mapped to the distortionless coordinate of preview image；
S6, using step S4 mobile terminal screen coordinate and step S5 generate mobile terminal shooting preview image it is undistorted
Coordinate and recalculate homography matrix described in step S3；
S7, it repeats the above steps repeatedly, obtains multiple groups parameter value, calculate the average value of multiple groups parameter value, joined according to the multiple groups
The coordinate that the average value of numerical value forms the screen of the preview image and the mobile terminal maps.
2. the method according to claim 1, wherein the hot spot is the visible light spot that laser pen issues.
3. the method according to claim 1, wherein this method further include:
Distortion model is established by the mapping relations of the point on the point and the preview image on the screen；
The distortion part in the preview image is corrected using the distortion model.
4. method according to any one of claims 1 to 3, which is characterized in that described to execute on the mobile terminal screen
Action-item with the mapping point corresponding position inquired includes:
Open the application program on the mobile terminal screen with the mapping point corresponding position inquired.
5. a kind of mobile terminal, which is characterized in that the mobile terminal includes:
Preview image obtains module, is projected in for mobile terminal described in the acquisition for mobile terminal pre- on projection display apparatus
Look at image；
Coordinate mapping module, the screen of the preview image and the mobile terminal for will acquire form coordinate mapping；
Hot spot acquisition module, when for collecting the hot spot on the projection display apparatus when the mobile terminal, inquiry and institute
State the mapping point of the corresponding screen of coordinate of hot spot；
Execution module, for executing the operation on the mobile terminal screen with the mapping point corresponding position inquired
；
The mobile terminal further include:
Filtering module, the camera for the mobile terminal are acquired through on the filtered projection display apparatus of optical filter
Preview image；
Most bright spot obtains module, for obtaining point most bright on the preview image, and using the most bright point as collected
The hot spot；
The coordinate mapping module is specifically used for:
Pointer position option under S1, opening mobile terminal development mode, and the page is scaled, mobile terminal screen is clicked with thin pen
Upper 9 palace trrellis diagram marks by center；At this point, mobile terminal can report original graph target coordinate position, while being clapped in mobile terminal
Preview interface is taken the photograph, corresponding coordinates of icon position can also be shown by clicking icon, thus generate 9 groups of corresponding coordinates；
S2, the equation about homography matrix is set up by the corresponding relationship of 9 groups of coordinates, is obtained according to the corresponding relationship of multiple coordinates
To the equation group of homography matrix, singular value decomposition is carried out to equation group and acquires homography matrix；
S3, the inverse transformation by homography matrix, calculate the coordinate of mobile terminal screen to mobile terminal shooting preview image without
The coordinate of distortion part；
S4, other 9 groups of mobile terminals corner location coordinate is chosen according to step S1, forms 9 groups of mobile terminal shooting preview images
Distort coordinate and the coordinate of corresponding mobile terminal screen of part；
S5, suitable camera distortion model is established by corresponding relationship, is shot mobile terminal using distortion model parameter pre-
The distort coordinate of part look in image is mapped to the distortionless coordinate of preview image；
S6, using step S4 mobile terminal screen coordinate and step S5 generate mobile terminal shooting preview image it is undistorted
Coordinate and recalculate homography matrix described in step S3；
S7, it repeats the above steps repeatedly, obtains multiple groups parameter value, calculate the average value of multiple groups parameter value, joined according to the multiple groups
The coordinate that the average value of numerical value forms the screen of the preview image and the mobile terminal maps.
6. mobile terminal according to claim 5, which is characterized in that the coordinate mapping module further include:
Distortion model establishes module, for being established by the mapping relations of the point on the point and the preview image on the screen
Distortion model；
Rectification module, for correcting the distortion part in the preview image using the distortion model.
7. a kind of system of interactive projection, which is characterized in that the system includes:
Mobile terminal as claimed in claim 5, the mobile terminal are equipped with the interface of projection display apparatus；
Projection display apparatus is connect, for showing preview image and light spot received with the mobile terminal；
Laser pen, for issuing the hot spot of visible light.
8. system according to claim 7, which is characterized in that the system further include:
Optical filter is located at before the camera of the mobile terminal, for the light to the camera for entering the mobile terminal
Line intensity decays.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105094803A (en) * | 2015-06-17 | 2015-11-25 | 深圳市美贝壳科技有限公司 | Visualized picture editing system and method thereof |
| CN106325614A (en) * | 2016-08-28 | 2017-01-11 | 上海纬而视科技股份有限公司 | Display control method and device using infrared touch or writing |
| CN106375842A (en) * | 2016-09-29 | 2017-02-01 | 努比亚技术有限公司 | Image sharing device and method |
| CN106648263B (en) * | 2016-11-11 | 2022-01-04 | 珠海格力电器股份有限公司 | Terminal equipment and control system, control method and device thereof |
| CN107577351A (en) * | 2017-09-26 | 2018-01-12 | 歌尔科技有限公司 | Coordinate mapping method, device, projecting apparatus and the optical projection system of view field |
| WO2019100407A1 (en) * | 2017-11-27 | 2019-05-31 | 华为技术有限公司 | Positioning of terminal screen based on transformation relation of coordinates of marking graphic points in pattern |
| CN108600641A (en) * | 2018-07-05 | 2018-09-28 | 维沃移动通信有限公司 | Photographic method and mobile terminal |
| CN109782962A (en) * | 2018-12-11 | 2019-05-21 | 中国科学院深圳先进技术研究院 | A kind of projection interactive method, device, system and terminal device |
| CN114527922A (en) * | 2022-01-13 | 2022-05-24 | 珠海视熙科技有限公司 | Method for realizing touch control based on screen identification and screen control equipment |
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