CN108629813A - A kind of acquisition methods, the device of projection device elevation information - Google Patents
A kind of acquisition methods, the device of projection device elevation information Download PDFInfo
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- CN108629813A CN108629813A CN201810419255.XA CN201810419255A CN108629813A CN 108629813 A CN108629813 A CN 108629813A CN 201810419255 A CN201810419255 A CN 201810419255A CN 108629813 A CN108629813 A CN 108629813A
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- elevation information
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- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/80—Analysis of captured images to determine intrinsic or extrinsic camera parameters, i.e. camera calibration
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Abstract
The invention discloses a kind of acquisition methods of projection device elevation information to include：Obtain the elevation information data apart from perspective plane of depth of field module acquisition；According to the longitudinal length parameter and lateral length parameter of depth of field module, the corresponding elevation information data of center predeterminable area of depth of field projection are determined；Calibration process is carried out to the corresponding elevation information data of center predeterminable area and obtains the elevation information of projection device；This method calculates the elevation information of projection device by using the corresponding elevation information data of center predeterminable area of depth of field module automatically, has not only avoided the high cost in the prior art by hand dipping, but also improve the measurement accuracy of the elevation information of projection device.The invention also discloses a kind of acquisition device of projection device elevation information, acquisition methods, device, projection device, terminal device and the computer readable storage mediums of projection device calibration parameter, have above-mentioned advantageous effect.
Description
Technical field
The present invention relates to electronic technology field, more particularly to a kind of acquisition methods of projection device elevation information, device, throwing
Acquisition methods, device, projection device, terminal device and the computer readable storage medium of shadow equipment Alignment parameter.
Background technology
Currently can the projection device (such as intelligent projection lamp) of human-computer interaction favored by more and more users, this kind is thrown
Shadow equipment generally mainly by operating system+depth of field module+HDMI (High Definition Multimedia Interface,
High-definition multimedia interface) output composition, the gesture operation of user is got by depth of field module, then operating system is made
Operating result, is finally output to by HDMI on desktop or metope by corresponding processing.Due to the projected area of depth of field module
The projected area of screen prjection corresponding more than operating system, and the ratio of projected area can also occur with the variation of height
Variation finds depth of field module so user needs first to carry out calibration operation before carrying out touch-control interaction using projection device
The correspondence of the projected area of projected area and the corresponding screen prjection of operating system.When the height of projection device changes
When, the corresponding depth coordinate of each calibration point can change, while in order to ensure the accuracy of calibration, need to each calibration
Effective range (calibration parameter) is arranged in point.
The process of setting calibration parameter is at present：Go out the height of projection device with ruler manual measurement first, then manually
The corresponding calibration parameter of the height is selected, different apk is weaved into and operates in operating system platform and calibrated.Pass through the setting
The process of calibration parameter is required for the height of hand dipping projection device after can see the height of adjustment projection device every time；This
The elevation information for the projection device that sample obtains can not only have measurement error, and need to rely on artificial, raising projection device use
Cost.
Invention content
The object of the present invention is to provide a kind of acquisition methods of projection device elevation information, device, projection device calibration ginsengs
Several acquisition methods, device, projection device, terminal device and computer readable storage mediums, is calculated automatically by depth of field module
The elevation information for going out projection device avoids the low precision by hand dipping in the prior art and high-cost problem.
In order to solve the above technical problems, the present invention provides a kind of acquisition methods of projection device elevation information, including：
Obtain the elevation information data apart from perspective plane of depth of field module acquisition；
According to the longitudinal length parameter and lateral length parameter of the depth of field module, determine that the center of depth of field projection is default
The corresponding elevation information data in region；
Calibration process is carried out to the corresponding elevation information data of the center predeterminable area and obtains the height letter of projection device
Breath.
Optionally, calibration process is carried out to the corresponding elevation information data of the center predeterminable area and obtains projection device
Elevation information, including：
The average value of the corresponding elevation information data of the center predeterminable area is calculated, and using the average value as described in
The elevation information of projection device.
Optionally, according to the longitudinal length parameter and lateral length parameter of the depth of field module, depth of field projection is determined
Before the corresponding elevation information data of center predeterminable area, further include：
The planarization on the perspective plane of detection of projection devices.
Optionally, the planarization on the perspective plane of detection of projection devices, including：
Calculate separately the latter elevation information data in often going from left to right corresponding elevation information data in depth of field projection
With the difference of previous elevation information data；
Calculate separately in the depth of field projection each column the latter elevation information in corresponding elevation information data from top to bottom
The difference of data and previous elevation information data；
Each difference is compared with Grads threshold respectively, when there is no the differences more than the Grads threshold
When, then the perspective plane of projection device is smooth.
Optionally, according to the longitudinal length parameter and lateral length parameter of the depth of field module, depth of field projection is determined
Before the corresponding elevation information data of center predeterminable area, further include：
Whether the installation of detection of projection devices is horizontal.
Optionally, whether the installation of detection of projection devices is horizontal, including：
It is intermediate to two sides to judge whether the size that the elevation information data of row from left to right are preset in depth of field projection meets
Edge is ascendant trend；
It is intermediate to two to judge whether the size that the elevation information data of row from top to bottom are preset in the depth of field projection meets
Lateral edges are ascendant trend；
If being ascendant trend, the projection device installation is horizontal.
The present invention also provides a kind of acquisition methods of projection device calibration parameter, including：Throwing as described in any one of the above embodiments
The acquisition methods of shadow device height information, and after the elevation information for obtaining projection device, obtain the height of the projection device
The corresponding calibration parameter of information.
The present invention also provides a kind of acquisition device of projection device elevation information, including：
Data acquisition module, the elevation information data apart from perspective plane for obtaining the acquisition of depth of field module；
Data decimation module is determined for the longitudinal length parameter and lateral length parameter according to the depth of field module
The corresponding elevation information data of center predeterminable area of depth of field projection；
Data calibration module is obtained for carrying out calibration process to the corresponding elevation information data of the center predeterminable area
The elevation information of projection device.
Optionally, the data calibration module is specially to calculate the corresponding elevation information data of the center predeterminable area
Average value, and using the average value as the module of the elevation information of the projection device.
Optionally, the acquisition device of the projection device elevation information further includes：
Planarization detection module, the planarization on the perspective plane for detection of projection devices.
Optionally, the planarization detection module, including：
First difference computational unit, for calculating separately in depth of field projection the often from left to right corresponding elevation information data of row
The difference of middle the latter elevation information data and previous elevation information data；
Second difference computational unit, for calculating separately in the depth of field projection each column corresponding elevation information from top to bottom
The difference of the latter elevation information data and previous elevation information data in data；
Planarization detection unit is more than for being respectively compared each difference with Grads threshold when being not present
When the difference of the Grads threshold, then the perspective plane of projection device is smooth.
Optionally, the acquisition device of the projection device elevation information further includes：
Level detecting module is installed, whether the installation for detection of projection devices is horizontal.
Optionally, the installation level detecting module, including：
First judging unit, for judge to preset in the depth of field projection elevation information data of row from left to right size whether
It is ascendant trend to meet intermediate both sides of the edge of arriving；
Second judgment unit presets the size for arranging elevation information data from top to bottom for judging in the depth of field projection
Whether meet it is intermediate to both sides of the edge be ascendant trend；
Horizontal detection unit is installed, if for being ascendant trend, the projection device installation is horizontal.
The present invention also provides a kind of acquisition device of projection device calibration parameter, including：Throwing as described in any one of the above embodiments
The acquisition device of shadow device height information；Further include：
Calibration parameter acquisition module, the corresponding calibration parameter of elevation information for obtaining the projection device.
The present invention also provides a kind of projection devices, including：Depth of field module, projection light machine, memory and processor；Its
In,
The memory, for storing computer program；
The processor is realized when for executing the computer program such as any of the above-described projection device elevation information
The step of acquisition methods, or the step of realizing the calibration method of projection device as described above.
The present invention also provides a kind of terminal devices, including projection device as described above.
The present invention also provides a kind of computer readable storage medium, calculating is stored on the computer readable storage medium
Machine program realizes the acquisition methods such as any of the above-described projection device elevation information when the computer program is executed by processor
The step of, or the step of realizing the calibration method of projection device as described above.
A kind of acquisition methods of projection device elevation information provided by the present invention, including：Obtain the acquisition of depth of field module
Elevation information data apart from perspective plane；According to the longitudinal length parameter and lateral length parameter of depth of field module, the depth of field is determined
The corresponding elevation information data of center predeterminable area of projection；Predeterminable area corresponding elevation information data in center are calibrated
Processing obtains the elevation information of projection device；
As it can be seen that this method calculates automatically by using the corresponding elevation information data of center predeterminable area of depth of field module
The elevation information of projection device need not carry out hand dipping in the case of projection device height change every time, both avoid
In the prior art by the high cost of hand dipping, and improve the measurement accuracy of elevation information.The present invention also provides one kind
The acquisition device of projection device elevation information, the acquisition methods of projection device calibration parameter, device, projection device, terminal device
And computer readable storage medium, there is above-mentioned advantageous effect, details are not described herein.
Description of the drawings
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 technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
The flow chart of the acquisition methods for the projection device elevation information that Fig. 1 is provided by the embodiment of the present invention；
The hardware block diagram for the depth of field module that Fig. 2 is provided by the embodiment of the present invention；
The schematic diagram for the center predeterminable area that Fig. 3 is provided by the embodiment of the present invention；
Fig. 4~Fig. 7 is respectively the gradient morphologies signal on the typical problematic perspective plane that the embodiment of the present invention is provided
Figure；
The flow chart of the acquisition methods for the projection device calibration parameter that Fig. 8 is provided by the embodiment of the present invention；
The icon display schematic diagram for the calibration point that Fig. 9 is provided by the embodiment of the present invention；
A kind of flow of the acquisition methods for specific projection device calibration parameter that Figure 10 is provided by the embodiment of the present invention
Schematic diagram；
The structure diagram of the acquisition device for the projection device elevation information that Figure 11 is provided by the embodiment of the present invention；
The structure diagram of the acquisition device for the projection device calibration parameter that Figure 12 is provided by the embodiment of the present invention.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
The every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Embodiment one
Referring to FIG. 1, the flow of the acquisition methods for the projection device calibration parameter that Fig. 1 is provided by the embodiment of the present invention
Figure；This method may include：
S100, the elevation information data apart from perspective plane for obtaining the acquisition of depth of field module.
Specifically, obtaining the elevation information of projection device in the image information obtained by depth of field module.Depth of field module obtains
To image information in contain it is every in the elevation information i.e. depth of field modules to perspective plane of all the points in depth of field module range of exposures
The elevation information of a point.The present embodiment is not defined specific depth of field module, it is only necessary to obtain corresponding elevation information
Data.
Such as the hardware block diagram of depth of field module is as shown in Fig. 2, general includes mainly TOF camera and RGB camera.RGB camera
The topographic map mode that the three-D profile of object can be represented different distance in different colors by (RGB general cameras) shows.TOF
Camera obtains depth map, i.e. the elevation information data of acquisition projection device to perspective plane；TOF camera and common machines visual imaging
Process also has similar place.TOF camera is by light source, optical component, sensor, control circuit and processing circuit under normal circumstances
Etc. several unit compositions, pass through light pulse ranging.TOF basic principles are by continuously emitting light pulse (generally black light)
To being observed on object, the light pulse reflected back from object is then received, passes through flight (round-trip) time of detecting optical pulses
To calculate testee with a distance from camera.TOF methods can be generally divided into two kinds according to the difference of modulator approach：Impulse modulation
(Pulsed Modulation) and continuous wave modulate (Continuous Wave Modulation).In practical applications, usually
Using sine wave modulation.Due to receiving terminal and transmitting terminal sine wave phase offset and object distance camera distance at
Direct ratio, therefore can be using phase offset come measurement distance, and then elevation information data can be got.
S110, longitudinal length parameter and lateral length parameter according to depth of field module determine that the center of depth of field projection is pre-
If the corresponding elevation information data in region.
The elevation information data obtained in step S100 are the elevation information of all the points in depth of field module range of exposures.And school
The corresponding elevation information of quasi- parameter refers to vertical range of the projection device to perspective plane.Therefore in order to improve the elevation information of acquisition
Accuracy, need to be determined to from the elevation information data of all the points in the depth of field module range of exposures characterization projection device to
The elevation information data of the vertical range on perspective plane.
Since projection device is all vertically to be projected under normal conditions, projection device is irradiated corresponding to depth of field module
The corresponding elevation information data in bosom of center in range, the i.e. depth of field projection are the height of projection device.
Further, the height of projection device is determined due to the elevation information data by one subpoint of depth of field projection centre
Degree, can have error (such as measurement error etc. of the point data).In order to reduce error, more accurate projection device is obtained
Elevation information.The present embodiment is determined most by obtaining the corresponding elevation information data of center predeterminable area of depth of field projection to integrate
The elevation information of whole projection device.The present embodiment does not limit the size of center predeterminable area specifically (in for example, it can be set to
Heart predeterminable area area and depth of field projected area ratio determine) and shape (such as can be rectangle, can also be circle etc.),
It can even is that the predeterminable area centered on putting the region formed by center preset quantity.User can be according to actual conditions
Center predeterminable area is set and changed.Referring to FIG. 3, center predeterminable area is black region in Fig. 3.
According to the longitudinal length parameter and lateral length parameter of depth of field module, it may be determined that the center of depth of field projection is default
The corresponding depth of field coordinate in region, and then can determine the corresponding elevation information data of each depth of field coordinate, you can with from depth of field mould
The corresponding elevation information data of center predeterminable area are filtered out in the elevation information data of group acquisition.For example, when depth of field projection
Size is 640*480, and the point abscissa in bosom is 320, ordinate 240.The center predeterminable area that can be chosen at this time is
The corresponding region abscissa 300-340, ordinate 225-255.It can determine that the depth of field of the corresponding point of center predeterminable area is sat
Mark, and then can determine the corresponding elevation information data of each depth of field coordinate.
S120, the height that projection device is obtained to center predeterminable area corresponding elevation information data progress calibration process are believed
Breath.
The main purpose of step S120 is to determine one accurately according to the corresponding elevation information data of center predeterminable area
Projection device elevation information.The present embodiment is not defined specific calibration process process, as long as can be to center
The corresponding elevation information data of predeterminable area optimize, and obtain the elevation information of accurately projection device.
Such as can be the corresponding elevation information data of calculating center predeterminable area average value and using average value as height
Spend information；It can also be the maximum value and minimum value of the corresponding elevation information data of removal center predeterminable area first, then calculate
The average value of remaining elevation information data and using average value as elevation information；Either by the corresponding height of center predeterminable area
Information data is spent according to sorting from small to large, takes median as elevation information；Either repeatedly it is averaged and will be final
Average value calculates the average value of the corresponding elevation information data of center predeterminable area, then removes center as elevation information
It is more than the elevation information data of threshold value with the difference of the average value in the corresponding elevation information data of predeterminable area and calculates residue
Elevation information data average value and using average value as elevation information.
Preferably, in order to ensure finally obtained elevation information it is accurate on the basis of improve calculating speed, this implementation
In example, the elevation information of projection device is obtained to center predeterminable area corresponding elevation information data progress calibration process to be wrapped
It includes：The average value of the corresponding elevation information data of calculating center predeterminable area, and using average value as elevation information.
Based on the above-mentioned technical proposal, the acquisition methods of projection device elevation information provided in an embodiment of the present invention, this method
Calculate the elevation information of projection device automatically by using the corresponding elevation information data of the center predeterminable area of depth of field module,
Need not hand dipping be carried out in the case of projection device height change every time, both avoided in the prior art through manual survey
The high cost of amount, and improve the measurement accuracy of elevation information.
Embodiment two
Based on embodiment one, in order to further increase the accuracy of elevation information in the present embodiment, the present embodiment is in basis
The longitudinal length parameter and lateral length parameter of depth of field module determine the corresponding height letter of the center predeterminable area of depth of field projection
Before ceasing data, can also include：
The planarization on the perspective plane of detection of projection devices.
Specifically, the main purpose of above-mentioned steps be in order to ensure perspective plane is smooth and perspective plane on there is no other
Article.Only obtain perspective plane be smooth and perspective plane on there is no elevation information data in the case of other articles.This
Embodiment does not limit the mode of the planarization on the perspective plane of specific detection of projection devices.Such as can be that user passes through observation
Determine whether smooth, executes step S100 again when perspective plane is smooth.It can also be the height using the depth of field module acquisition obtained
Degree information data automatically determine perspective plane whether planarization, execute step S110, certain the present embodiment again when perspective plane is smooth
Do not limit yet how the elevation information data acquired according to depth of field module automatically determine perspective plane whether planarization mode (such as
Gradient detection is carried out to the elevation information data of depth of field module acquisition).It is detected due to the planarization on the perspective plane of user's selection
Mode is uncertain, therefore the step of the present embodiment does not limit the planarization on the perspective plane of detection of projection devices is located at step S100
Before, or between step S100 and step S110.
Further, planarization detection can be carried out to entire perspective plane in the present embodiment, it can also be only to selection area
Interior perspective plane carries out planarization detection.The present embodiment is not defined the size and shape of the selection area, general feelings
It is the bigger the better under condition, or including at least the projected area of operating system.The throwing that the present embodiment is not detected needs
The size on the perspective plane of shadow equipment is defined.Can be detection of projection devices perspective plane in selection area planarization.
Preferably, when the perspective plane out-of-flatness of projection device, corresponding elevation information data are asked there are big jump
It may be used that calculating speed is fast with reference to figure 4~7, therefore in the present embodiment and throwing to projection device realized in the detection of accurate gradient
The detection of the planarization in shadow face.The present embodiment is not defined specific gradient detection process, such as can be only to level
Direction carries out gradient detection；Can also be that gradient detection only is carried out to vertical direction；Can also be at the same to horizontal direction and
Vertical direction carries out gradient detection；Can also be only in selection area horizontal direction and vertical direction carry out gradient inspection
It surveys.
It is more accurate that the testing result that gradient detects is carried out to horizontal direction and vertical direction of course simultaneously.Specifically
Process can be as follows：
Calculate separately the latter elevation information data in often going from left to right corresponding elevation information data in depth of field projection
With the difference of previous elevation information data；
Calculate separately in the depth of field projection each column the latter elevation information data in corresponding elevation information data from top to bottom
With the difference of previous elevation information data；
Each difference is compared with Grads threshold respectively, when the difference more than Grads threshold is not present, is then projected
The perspective plane of equipment is smooth.
Wherein, the present embodiment is not defined the numerical values recited of Grads threshold, and user can be according to actual conditions certainly
Row selection is modified according to using effect.Row Grads threshold and row gradient threshold can also be respectively set in certain user
Value.The present embodiment is not limited thereto.
It is determined first per from left to right corresponding elevation information data in a line in depth of field projection, it is latter using utilizing successively
The elevation information data of a point and previous point are that elevation information data obtain difference (difference is positive number, i.e., is subtracted using big data
Small data are gone to obtain difference, or it is elevation information data to subtract previous point using the elevation information data of the latter point
Obtain difference and take absolute value), and each obtained difference is compared with Grads threshold, it is more than ladder when being not present
When spending the difference of threshold value, then it is assumed that there is no problem for the row.The detection process of row is gone together.When all there is no big for row and whole rows
When the difference of Grads threshold, then the perspective plane of projection device is smooth.
Can the operation of calculating difference be carried out to each row data parallel in the present embodiment and carry out the comparison with Grads threshold,
Then the operation of calculating difference is carried out to each column data parallel and carries out the comparison with Grads threshold；Can also be parallel to each row
And each column data carries out the operation of calculating difference, eventually carries out the comparison with Grads threshold；Can also be first right successively
Certain a line (or row) data carries out the operation of calculating difference and carries out the comparison with Grads threshold, when there is no more than gradient threshold
Next line (or row) is executed when the difference of value when there is the difference more than Grads threshold to terminate.
Further, when all row and whole rows have the difference more than Grads threshold, then the perspective plane of projection device is not
It is smooth, at this time in order to improve user experience, prompt operation can be executed.It is i.e. preferred, when the perspective plane for detecting projection device
When out-of-flatness (having gradient morphologies problem), prompt have article on user's perspective plane out-of-flatness or perspective plane, so that user carries out
Subsequent processing.
Certainly, the present embodiment does not limit the mode and suggestion content of prompt operation.Such as can be voice prompt,
It can be text prompt, can also be instruction lamp prompt；The content of prompt can be that perspective plane out-of-flatness or perspective plane are placed
There is object etc..
Embodiment three
Based on embodiment one or embodiment two, in order to further increase the accuracy of elevation information in the present embodiment, this
Embodiment determines the center predeterminable area of depth of field projection in the longitudinal length parameter and lateral length parameter according to depth of field module
Before corresponding elevation information data, can also include：
Whether the installation of detection of projection devices is horizontal.
Specifically, whether the main purpose of above-mentioned steps is horizontal in order to ensure the installation of projection device.The present embodiment is simultaneously
Do not limit specific detection of projection devices installation whether horizontal mode.Such as can be that user determines whether water by observation
It is flat, step S100 is executed again when the installation level of projection device.It can also be the height using the depth of field module acquisition obtained
Whether the installation that information data automatically determines projection device is horizontal, and step S110 is executed again when the installation level of projection device,
Certain the present embodiment do not limit yet how the installation that the elevation information data acquired according to depth of field module automatically determine projection device
Whether horizontal mode (such as size of data analysis of trend is carried out to the elevation information data of depth of field module acquisition).Due to
Whether the mode of horizontal detection is not known for the installation for the projection device that user chooses, therefore the present embodiment does not limit detection and throws
Whether horizontal step is located at before step S100 for the installation of shadow equipment, or between step S100 and step S110.When
When the present embodiment is based on above-described embodiment two the present embodiment do not limit detection of projection devices whether installation horizontal, detection projection
The planarization on the perspective plane of equipment and the sequencing for obtaining three steps of elevation information data that depth of field module acquires.
For the projection device being horizontally mounted, for same a line (same row) image information, from projection device position
The depth value for setting remote point is big, and the point depth value close from projection device position is small, so the variation of the depth value with a line image
Trend is reduced from the left side to intermediate depth value, is then increased from centre to the right depth value, the depth of same same row image
The variation tendency of angle value is reduced from top to intermediate depth value, is then increased from centre to following depth value.The present embodiment is simultaneously
The variation tendency detection process of specific depth value is not defined, such as only certain a line or a few rows can be examined
It surveys；Can also be that only a certain row or a few row are detected；Can also be while to certain a line and a certain row or a few
Row and a few row are detected.In order to improve projection device whether installation level detection reliability, it is preferred that detection projection set
Whether level may include for standby installation：
It is intermediate to two sides to judge whether the size that the elevation information data of row from left to right are preset in depth of field projection meets
Edge is ascendant trend；
It is intermediate to two sides to judge whether the size that the elevation information data of row from top to bottom are preset in depth of field projection meets
Edge is ascendant trend；
If being ascendant trend, projection device installation is horizontal.
Wherein, the present embodiment is not defined the numerical value for presetting row and default row, chooses any row under normal circumstances
With either rank.It when user chooses multirow, needs to judge the elevation information data of every a line from left to right, judge
Its whether meet it is intermediate to both sides of the edge be ascendant trend.When user chooses multiple row, the height from top to bottom to each row is needed
Degree information data is judged, judges whether it meets centre to both sides of the edge for ascendant trend.
The present embodiment, which does not limit, judges whether the size of elevation information data from left to right meets centre to two sides
Edge be the size of ascendant trend or elevation information data from top to bottom whether meet it is intermediate to both sides of the edge be ascendant trend
Mode, such as can be by drawing the often elevation information of each column from top to bottom of the elevation information data of row from left to right either
Data X-Y scheme judges whether it meets centre to both sides of the edge for ascendant trend (the i.e. upper parabolic of opening by image
Line)；To in each column elevation information data from top to bottom of the elevation information data of every row from left to right either according to
Secondary adjacent two data multilevel iudge whether meet it is intermediate to both sides of the edge be ascendant trend.
Under the previous case judge X-Y scheme whether meet centre to both sides of the edge for ascendant trend when can be use
It is weighed by eyes oneself at family, naturally it is also possible to be to pass through Computer Automatic Recognition.It is compared to each other in the two under latter situation
When, can be starting from intermediate point, the right and left judges whether adjacent the latter point is more than and leans on paracentral point successively, if
More than be then considered as meeting it is intermediate to both sides of the edge be ascendant trend.In the process in order to reduce error, threshold value can be set,
The latter point occurred once in a while when leaning at paracentral, judges whether difference is less than threshold value less than adjacent, if being less than threshold value
If, difference can be ignored herein.The number of the either such situation of statistics appearance is also considered as when number is less than frequency threshold value
It is ascendant trend to meet intermediate both sides of the edge of arriving.
Further, in actual use, do not ensure that projection device be installed horizontally (i.e. the value of intermediate point be most
It is small).In order to reduce it is above-mentioned judge whether to meet it is intermediate to both sides of the edge for ascendant trend during, due to the numerical value of intermediate point
Occur error and caused by misjudgment the case where.It is preferred in the present embodiment, the depth of a line middle preset quantity point can be taken
The average value of the angle value depth value (row the case where go together) i.e. most intermediate as the row as minimum value, then checks that edge is past again
Whether middle section and middle section meet above-mentioned trend toward edge.Such as the data of certain a line are 640, central point
Position be the 320th, minimum value of the average value of the depth coordinate value of point from 310 to 330 as this line can be calculated,
The method is also used similarly for the data of a row.
Also specific computation sequence is not defined in two the present embodiment of embodiment, can select parallel processing can also
Selection is handled in order.
Further, if the row data or column data of interception do not meet above-mentioned trend, illustrate that projection device is not in level
Position can execute prompt operation at this time in order to improve user experience.It is i.e. preferred, when detecting projection device installation not water
When flat (not meeting above-mentioned trend), prompt the installation of user's projection device unhorizontal, so that user is subsequently adjusted.
Certainly, the present embodiment does not limit the mode and suggestion content of prompt operation.Such as can be voice prompt,
It can be text prompt, can also be instruction lamp prompt；The content of prompt can be that projection device installation is not horizontal, or answers
How this adjusts the content etc. of projection device.
Example IV
Referring to FIG. 8, the flow of the acquisition methods for the projection device calibration parameter that Fig. 8 is provided by the embodiment of the present invention
Figure；This method may include：
S200, the elevation information data apart from perspective plane for obtaining the acquisition of depth of field module.
S210, longitudinal length parameter and lateral length parameter according to the depth of field module determine in depth of field projection
The corresponding elevation information data of heart predeterminable area.
S220, the height of projection device is obtained to the center predeterminable area corresponding elevation information data progress calibration process
Spend information.
Step S200 to step S220 can refer to the particular content in above-described embodiment one to embodiment three.
S230, the corresponding calibration parameter of elevation information for obtaining the projection device.
In the present embodiment corresponding calibration parameter can be selected after obtaining elevation information automatically according to elevation information.It is i.e. whole
A projection device once sets the calibration parameter of the corresponding calibration point of different height, during follow-up use, obtains automatically
The elevation information of projection device is taken, the corresponding calibration parameter of the height is then automatically selected.Wherein, calibration parameter is calibrated
The depth coordinate range of point.
The present embodiment does not limit the process for the calibration parameter that the corresponding calibration point of different height is specifically arranged, user
Can voluntarily it be arranged according to actual conditions.Such as：Referring to FIG. 9, using existing 12 calibration point calibrating modes, in reality
In use, calibration point is individually shown needs one by one, rather than 12 calibration points are shown together.For example first show the upper left corner
First calibration point of the first row first row prompts user's calibration, when detecting detection object (such as finger) in first school
It the calibration parameter being arranged on schedule within the scope of, is hidden, shows second calibration point of the first row secondary series, prompt user school
Then standard judges detection object whether within the scope of the calibration parameter of second calibration point of setting, and so on.Until 12
Calibration point completes calibration all within the scope of the calibration parameter of setting.
Range setting for calibration parameter, in initial stage of development, needs the height for determining projection device first, then will inspection
It surveys object (such as finger) to be put on calibration point, gets the corresponding depth coordinate of calibration point, be then worth to according to buffer
Calibration parameter, when analogy height is 70cm, the depth coordinate value of first calibration point center is (100,100), buffer
Value is 30, then the calibration parameter X-coordinate of this calibration point is 100-30=70 to 100+30=130, Y coordinate 100-30=
70 arrive 100+30=130.The range of the X-coordinate of calibration point and the range of Y coordinate are calibration parameter.Same method is got
The calibration parameter of remaining 11 calibration point.The setting of buffer values herein needs to test repeatedly, and detection object is placed on calibration
The center of point gets depth coordinate value, is then placed on four vertex in upper left, lower-left, upper right, the bottom right position of calibration icon
The depth coordinate value for setting acquisition depth coordinate value and center does difference operation, and the maximum value of absolute difference is buffer
Value.If value is too small, it is possible to which detection object is placed on calibration point but can not detect finger, can not be calibrated；If value
It is too big, it is possible to detection object leave school it is on schedule too far be detected by detection object, cause calibration inaccurate, need one conjunction of selection
Suitable value obtains preferable user experience.The effect that calibration parameter is arranged is that the effective coverage of calibration point is arranged, in calibration process
In, only when detection object is placed in the effective coverage of setting by user, just it is considered effective depth coordinate.
Further, since hand dipping in the prior art goes out the height of projection device, corresponding calibration parameter is manually selected
Afterwards, it needs to weave into different apk to operate on Android platform and be calibrated.Therefore its apk for needing to safeguard different editions, uses
It is inconvenient.And user only needs the calibration parameter of the primary different corresponding calibration point of height of setting in the present embodiment, therefore open
Originator only needs to safeguard a set of code, has saved development cost；User also need not select different editions according to height
Apk, thereby using more convenient.
Based on the above-mentioned technical proposal, the acquisition methods of projection device calibration parameter provided in an embodiment of the present invention, pass through scape
The height of the image data acquisition of deep module to projection device eliminates every time then according to highly automated selection calibration parameter
Adjustment projection device height defensive position momentum takes the trouble of projection device height, and avoids manually operated error；And it develops
Person only needs to safeguard a set of code (highly with the correspondence of calibration parameter), has saved development cost；User is not yet
The apk according to height selection different editions is needed, thereby using more convenient.
Figure 10 is turned next to, the detailed process of above-described embodiment is illustrated by taking projection lamp as an example.
First carry out gradient detection, so that it is guaranteed that perspective plane be smooth and perspective plane on there is no other laying for goods.
Then whether detection projection lamp is horizontal, and is only horizontally mounted, could obtain the true elevation information of projection lamp.It connects down
Carry out the elevation information according to image information acquisition projection lamp.Corresponding calibration parameter is finally automatically selected according to elevation information.
Based on the above-mentioned technical proposal, the key point of the acquisition methods of projection device calibration parameter is root in the embodiment of the present invention
According to the image information acquisition of depth of field module to the elevation information of projection device, corresponding school is then automatically selected according to elevation information
Quasi- parameter.Accuracy is obtained in order to improve projection device elevation information, before obtaining elevation information, gradient is carried out to image first
Detection, when if there is Grad, illustrates there is article on perspective plane out-of-flatness or perspective plane, needs to detect again after first processing；
Then to projection identification installation, whether level detects, if projection lamp has inclination, adjusts to horizontal position and detects again.
Below to the acquisition device of projection device elevation information provided in an embodiment of the present invention, projection device calibration parameter
Acquisition device, projection device, terminal device and computer readable storage medium are introduced, projection device height described below
The acquisition device of information, the acquisition device of projection device calibration parameter, projection device, terminal device and computer-readable storage medium
Matter can correspond reference with the acquisition methods of above-described projection device elevation information.
Please refer to Fig.1 the structure of the acquisition device for the projection device elevation information that 1, Figure 11 is provided by the embodiment of the present invention
Block diagram；The device may include：
Data acquisition module 100, the elevation information data apart from perspective plane for obtaining the acquisition of depth of field module；
Data decimation module 200 determines scape for the longitudinal length parameter and lateral length parameter according to depth of field module
The corresponding elevation information data of center predeterminable area projected deeply；
Data calibration module 300 is obtained for carrying out calibration process to the corresponding elevation information data of center predeterminable area
The elevation information of projection device.
Based on above-described embodiment, data calibration module 300 is specially to calculate the corresponding height letter of the center predeterminable area
The average value of data is ceased, and using the average value as the module of the elevation information of the projection device.
Based on above-mentioned any embodiment, which can also include：
Planarization detection module, the planarization on the perspective plane for detection of projection devices.
Preferably, planarization detection module, including：
First difference computational unit, for calculating separately in depth of field projection the often from left to right corresponding elevation information data of row
The difference of middle the latter elevation information data and previous elevation information data；
Second difference computational unit, for calculating separately each column corresponding elevation information data from top to bottom in depth of field projection
The difference of middle the latter elevation information data and previous elevation information data；
Planarization detection unit is more than gradient for being respectively compared each difference with Grads threshold when being not present
When the difference of threshold value, then the perspective plane of projection device is smooth.
Based on above-mentioned any embodiment, which can also include：
Level detecting module is installed, whether the installation for detection of projection devices is horizontal.
Preferably, level detecting module is installed, including：
First judging unit, for judge to preset in the depth of field projection elevation information data of row from left to right size whether
It is ascendant trend to meet intermediate both sides of the edge of arriving；
Second judgment unit, for judging whether preset the size for arranging elevation information data from top to bottom in depth of field projection
It is ascendant trend to meet intermediate both sides of the edge of arriving；
Horizontal detection unit is installed, if for being ascendant trend, projection device installation level.
The embodiment of acquisition device based on above-mentioned aphylactic map projection device height information, it is this hair to please refer to Fig.1 2, Figure 12
The structure diagram of the acquisition device for the projection device calibration parameter that bright embodiment is provided；The device may include：
Data acquisition module 100, the elevation information data apart from perspective plane for obtaining the acquisition of depth of field module；
Data decimation module 200 determines scape for the longitudinal length parameter and lateral length parameter according to depth of field module
The corresponding elevation information data of center predeterminable area projected deeply；
Data calibration module 300 is obtained for carrying out calibration process to the corresponding elevation information data of center predeterminable area
The elevation information of projection device；
Calibration parameter acquisition module 400, the corresponding calibration parameter of elevation information for obtaining the projection device.
It should be noted that being based on above-mentioned any embodiment, described device can be realized based on programmable logic device
, programmable logic device includes FPGA, CPLD, microcontroller etc..
Also a kind of projection device of the embodiment of the present invention, including：Depth of field module, projection light machine, memory and processor；Its
In,
Memory, for storing computer program；
Processor realizes the projection device elevation information as described in above-mentioned any embodiment when for executing computer program
Acquisition methods the step of.As processor obtains the elevation information data apart from perspective plane that depth of field module acquires；According to the depth of field
The longitudinal length parameter and lateral length parameter of module determine the corresponding elevation information number of center predeterminable area of depth of field projection
According to；Calibration process is carried out to the corresponding elevation information data of center predeterminable area and obtains the elevation information of projection device.Or it realizes
The step of calibration method of projection device as described in above-mentioned any embodiment.Such as obtain the depth of field module acquisition apart from perspective plane
Elevation information data；According to the longitudinal length parameter and lateral length parameter of depth of field module, the center of depth of field projection is determined
The corresponding elevation information data of predeterminable area；Calibration process is carried out to the corresponding elevation information data of center predeterminable area to be thrown
The elevation information of shadow equipment；Obtain the corresponding calibration parameter of elevation information of projection device.
Based on above-described embodiment, which can also include：
Output block, for exporting prompt message.
Specifically, the present embodiment does not limit output block concrete form, for example, can be voice output component either
Indicator light.
Also a kind of terminal device of the embodiment of the present invention, which is characterized in that including the projection device described in above-described embodiment.Tool
Body, the present embodiment is not defined terminal device, can be mobile phone either projector.
Also a kind of computer readable storage medium of the embodiment of the present invention, which is characterized in that on computer readable storage medium
It is stored with computer program, realizes that the projection device as described in above-mentioned any embodiment is high when computer program is executed by processor
The step of spending the acquisition methods of information.As processor obtains the elevation information data apart from perspective plane that depth of field module acquires；Root
According to the longitudinal length parameter and lateral length parameter of depth of field module, the corresponding height of center predeterminable area of depth of field projection is determined
Information data；Calibration process is carried out to the corresponding elevation information data of center predeterminable area and obtains the elevation information of projection device.
Or the step of realizing the calibration method of projection device as described in above-mentioned any embodiment.Such as obtain the distance of depth of field module acquisition
The elevation information data on perspective plane；According to the longitudinal length parameter and lateral length parameter of depth of field module, determine that the depth of field projects
The corresponding elevation information data of center predeterminable area；Calibration process is carried out to the corresponding elevation information data of center predeterminable area
Obtain the elevation information of projection device；Obtain the corresponding calibration parameter of elevation information of projection device.
The computer readable storage medium may include：USB flash disk, mobile hard disk, read-only memory (Read-Only
Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disc or CD etc. are various to deposit
Store up the medium of program code.
Each embodiment is described by the way of progressive in specification, the highlights of each of the examples are with other realities
Apply the difference of example, just to refer each other for identical similar portion between each embodiment.For device disclosed in embodiment
Speech, since it is corresponded to the methods disclosed in the examples, so description is fairly simple, related place is referring to method part illustration
.
Professional further appreciates that, unit described in conjunction with the examples disclosed in the embodiments of the present disclosure
And algorithm steps, can be realized with electronic hardware, computer software, or a combination of the two, in order to clearly demonstrate hardware and
The interchangeability of software generally describes each exemplary composition and step according to function in the above description.These
Function is implemented in hardware or software actually, depends on the specific application and design constraint of technical solution.Profession
Technical staff can use different methods to achieve the described function each specific application, but this realization is not answered
Think beyond the scope of this invention.
The step of method described in conjunction with the examples disclosed in this document or algorithm, can directly be held with hardware, processor
The combination of capable software module or the two is implemented.Software module can be placed in random access memory (RAM), memory, read-only deposit
Reservoir (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technology
In any other form of storage medium well known in field.
A kind of acquisition methods of projection device elevation information provided by the present invention, device, projection device are calibrated above
Acquisition methods, device, projection device, terminal device and the computer readable storage medium of parameter are described in detail.Herein
In apply specific case principle and implementation of the present invention are described, the explanation of above example is only intended to sides
Assistant solves the method and its core concept of the present invention.It should be pointed out that for those skilled in the art, not
, can be with several improvements and modifications are made to the present invention under the premise of being detached from the principle of the invention, these improvement and modification are also fallen into
In the protection domain of the claims in the present invention.
Claims (17)
1. a kind of acquisition methods of projection device elevation information, which is characterized in that including：
Obtain the elevation information data apart from perspective plane of depth of field module acquisition；
According to the longitudinal length parameter and lateral length parameter of the depth of field module, the center predeterminable area of depth of field projection is determined
Corresponding elevation information data；
Calibration process is carried out to the corresponding elevation information data of the center predeterminable area and obtains the elevation information of projection device.
2. the acquisition methods of projection device elevation information according to claim 1, which is characterized in that default to the center
The corresponding elevation information data in region carry out calibration process and obtain the elevation information of projection device, including：
The average value of the corresponding elevation information data of the center predeterminable area is calculated, and using the average value as the projection
The elevation information of equipment.
3. the acquisition methods of projection device elevation information according to claim 1 or 2, which is characterized in that according to the scape
The longitudinal length parameter and lateral length parameter of deep module determine the corresponding elevation information of center predeterminable area of depth of field projection
Before data, further include：
The planarization on the perspective plane of detection of projection devices.
4. the acquisition methods of projection device elevation information according to claim 3, which is characterized in that detection of projection devices
The planarization on perspective plane, including：
The latter elevation information data are calculated separately in depth of field projection in the often from left to right corresponding elevation information data of row with before
The difference of one elevation information data；
Calculate separately in the depth of field projection each column the latter elevation information data in corresponding elevation information data from top to bottom
With the difference of previous elevation information data；
Each difference is compared with Grads threshold respectively, when the difference more than the Grads threshold is not present, then
The perspective plane of projection device is smooth.
5. the acquisition methods of projection device elevation information according to claim 1 or 2, which is characterized in that according to the scape
The longitudinal length parameter and lateral length parameter of deep module determine the corresponding elevation information of center predeterminable area of depth of field projection
Before data, further include：
Whether the installation of detection of projection devices is horizontal.
6. the acquisition methods of projection device elevation information according to claim 5, which is characterized in that detection of projection devices
Whether installation is horizontal, including：
Judge whether the size that the elevation information data of row from left to right are preset in depth of field projection meets centre and be to both sides of the edge
Ascendant trend；
It is intermediate to two sides to judge whether the size that the elevation information data of row from top to bottom are preset in the depth of field projection meets
Edge is ascendant trend；
If being ascendant trend, the projection device installation is horizontal.
7. a kind of acquisition methods of projection device calibration parameter, which is characterized in that including：As described in claim any one of 1-6
Projection device elevation information acquisition methods, and obtain projection device elevation information after, obtain the projection device
The corresponding calibration parameter of elevation information.
8. a kind of acquisition device of projection device elevation information, which is characterized in that including：
Data acquisition module, the elevation information data apart from perspective plane for obtaining the acquisition of depth of field module；
Data decimation module determines the depth of field for the longitudinal length parameter and lateral length parameter according to the depth of field module
The corresponding elevation information data of center predeterminable area of projection；
Data calibration module is projected for carrying out calibration process to the corresponding elevation information data of the center predeterminable area
The elevation information of equipment.
9. the acquisition device of projection device elevation information according to claim 8, which is characterized in that the data calibration mould
Block specially calculates the average value of the corresponding elevation information data of the center predeterminable area, and using the average value as described in
The module of the elevation information of projection device.
10. the acquisition device of projection device elevation information according to claim 8 or claim 9, which is characterized in that further include：
Planarization detection module, the planarization on the perspective plane for detection of projection devices.
11. the acquisition device of projection device elevation information according to claim 10, which is characterized in that the planarization inspection
Module is surveyed, including：
First difference computational unit, after calculating separately in depth of field projection in the often from left to right corresponding elevation information data of row
The difference of one elevation information data and previous elevation information data；
Second difference computational unit, for calculating separately in the depth of field projection each column corresponding elevation information data from top to bottom
The difference of middle the latter elevation information data and previous elevation information data；
Planarization detection unit, for being respectively compared each difference with Grads threshold, when there is no more than described
When the difference of Grads threshold, then the perspective plane of projection device is smooth.
12. the acquisition device of projection device elevation information according to claim 8 or claim 9, which is characterized in that further include：
Level detecting module is installed, whether the installation for detection of projection devices is horizontal.
13. the acquisition device of projection device elevation information according to claim 12, which is characterized in that the installation is horizontal
Detection module, including：
First judging unit, for judging whether the size for presetting the elevation information data of row from left to right in depth of field projection meets
It is ascendant trend that both sides of the edge are arrived in centre；
Second judgment unit, for judging whether preset the size for arranging elevation information data from top to bottom in the depth of field projection
It is ascendant trend to meet intermediate both sides of the edge of arriving；
Horizontal detection unit is installed, if for being ascendant trend, the projection device installation is horizontal.
14. a kind of acquisition device of projection device calibration parameter, which is characterized in that including：Such as any one of claim 8-13 institutes
The acquisition device for the projection device elevation information stated；Further include：
Calibration parameter acquisition module, the corresponding calibration parameter of elevation information for obtaining the projection device.
15. a kind of projection device, which is characterized in that including：Depth of field module, projection light machine, memory and processor；Wherein,
The memory, for storing computer program；
The processor is realized when for executing the computer program such as any one of claim 1 to 6 projection device height letter
The step of acquisition methods of breath, or the step of realizing the calibration method of projection device as claimed in claim 7.
16. a kind of terminal device, which is characterized in that including projection device as claimed in claim 15.
17. a kind of computer readable storage medium, which is characterized in that be stored with computer on the computer readable storage medium
Program realizes obtaining such as any one of claim 1 to 6 projection device elevation information when the computer program is executed by processor
The step of taking method, or the step of realizing the calibration method of projection device as claimed in claim 7.
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| CN201810419255.XA CN108629813B (en) | 2018-05-04 | 2018-05-04 | Method and device for acquiring height information of projection equipment |
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| CN201810419255.XA CN108629813B (en) | 2018-05-04 | 2018-05-04 | Method and device for acquiring height information of projection equipment |
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