CN103955318B - Double pens are identified by photoelectricity interaction module and double pen near time differentiating method - Google Patents
Double pens are identified by photoelectricity interaction module and double pen near time differentiating method Download PDFInfo
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Abstract
The present invention provide double pens are identified by a kind of photoelectricity interaction module and double pen near time differentiating method, described photoelectricity interaction module has at least two photographic head, photographic head is provided with optical filter；1, at least two photoelectric pens of method, two light sending different wave length respectively, and according to the waveform set, bright secretly send waveform light by a time interval；2, it has been mounted the light that two photoelectric pens send by the photographic head of respective filter to capture；3, the hot spot data captured two camera lenses respectively obtain；4, after obtaining the hot spot data of each camera lens capture, the interference of other light is distinguished further according to the different bright dark waveforms of pen；5, two pens are near writing, and two camera lenses can obtain two close hot spots of photoelectric pen respectively, and the present frame obtaining main lens and secondary mirror head screens respectively.The present invention effectively can carry out tracking during writing movements to photoelectric pen, effectively eliminates miscellaneous point, interference, and occur when writing string pen, the even problem such as pen.
Description
Technical field
The present invention relates to computer software technical field, particularly relate in a kind of photoelectricity interaction module double pens
Be identified and double pen near time differentiating method.
Background technology
Along with developing rapidly of computer, create the projection module of many photoelectricity series products, general throwing
Shadow module is wanted to realize at 2 and is required for by the way of a tracking realizing, and puts the mode of tracking 2
Pen will produce erroneous judgement in time writing, and produces phenomenons such as jumping a string pen, here it is what industry was often said
False 2, and the product relevant to light is often affected by external visible ray, causes hop, even pen,
The problems such as string pen cause experience or defect functionally.Due to extraneous visible ray impact, receive light
It is the light that sends of what luminaire that equipment None-identified goes out, and the most sometimes can cause receiving setting of light
For realizing corresponding function.Patent application document can effectively distinguish light source, and carries out motion rail
Following the tracks of with the external light source of reduction Consumer's Experience or the impact of product function of mark, is divided by 2 camera lenses
Not Jie Shou different-waveband light source, realize a double function truly.
Summary of the invention
The technical problem to be solved in the present invention, is to provide a kind of photoelectricity interaction module to be automatically positioned
Method, the present invention the most singly identifies the light source that equipment sends, moreover it is possible to effectively photoelectric pen is carried out writing movements
Time identification, effectively eliminate miscellaneous point, interference, and lack when writing follow the tracks of cause string pen, company
The problems such as pen.
The present invention is achieved in that in a kind of photoelectricity interaction module and is identified double pens and double pen is close
Time differentiating method, described photoelectricity interaction module has at least two photographic head, photographic head is provided with optical filtering
Sheet, two optical filters can filter off the light of two kinds of wavelength respectively；
Described method comprises the steps:
Step 1, at least two photoelectric pens, two photoelectric pens send the light of different wave length respectively, and according to setting
Fixed waveform, bright secretly sends waveform light by a time interval；
Step 2, it is mounted the light that two photoelectric pens send by the photographic head of respective filter and has caught
Obtain；
Step 3, the hot spot data captured two camera lenses respectively obtain, due to optical filter and pen
Characteristic, a camera lens can only capture the light that a photoelectric pen sends, and another camera lens can only capture another
The light that photoelectric pen sends, two camera lenses can two group data separately single-lens be carried out as two respectively
Process；
Step 4, obtain the hot spot data of each camera lens capture after, come district further according to the different bright dark waveforms of pen
Divide the interference of other light；
Step 5, two photoelectric pens are near writing, and it is close that two camera lenses can obtain two photoelectric pens respectively
Two photoelectric pens are divided into chief editor and secondary pen by hot spot, then the camera lens capturing chief editor is main lens, capture pair
The camera lens of pen is secondary mirror head, and the present frame obtaining main lens and secondary mirror head screens respectively, main lens
The frame of middle acquisition has two hot spots against close, then the hot spot obtained according to hot spot common factor mode can catch up with one
Frame data produce when occuring simultaneously, and pass through filbtercharacteristic, it is judged that the area of two points, hot spot little for area
Get rid of；Secondary mirror head is also carried out same eliminating, thus complete double pen near time distinguish.
Further, described hot spot data include facula position, area, and length and width information.
Further, write from the close place of lens location at photoelectric pen, due to the effect of optical filter
Difference, can produce main lens and can see the hot spot of secondary pen, and secondary mirror head can be seen the hot spot of chief editor, at this moment need
The hot spot of exclusive PCR is carried out by step 4.
Further, step 4 is particularly as follows: the complete ripple of the once pens to be received such as Shi Xian of starting to write at photoelectric pen
Shape, the data of the corresponding frame of a ripple in waveform, then click on row filter to what each frame got,
The track moved according to photoelectric pen and the characteristic of camera lens, it is judged that the spot tracks that pen produces is in every frame data
Whether the hot spot of consecutive frame exists common factor, is, then do not have external interference point, if there is not common factor, then
Remove the external interference point that there is not common factor.
Present invention have the advantage that the present invention passes through photoelectric pen (luminaire) frequent in the unit interval
Bright secretly, and by photographic head (video input apparatus) receive image.Receive according to video input apparatus
Bright dark number of times and order judge whether it is this luminaire, and the present invention can identify the luminescence of customization and set
Standby, different photoelectric pens can be distinguished as applied in blank field, a button etc., further according to photoelectric pen
Select different types of light, and add the most supporting optical filter to camera lens, be that camera lens can only see phase
Answer the light that the pen of light wave type sends, (such as: can see that the camera lens of infrared light can only see the pen sending out infrared light
The light source sent, the light that the pen of other visible rays sends then cannot be seen) to realize true double-pen writing
Function；Owing to photovoltaic is affected relatively big by external light source, and external light source is the most all constant visible
Light or irregular flash, therefore this invention can have the interference of more anti-ambient light.It addition, this
Bright the most singly identify the light source that equipment sends, moreover it is possible to effectively to photoelectric pen district in time carrying out writing movements
Point, effectively eliminate miscellaneous point, interference, and lack when writing follow the tracks of cause string pen, even pen etc. ask
Topic.
Accompanying drawing explanation
Fig. 1 is the inventive method schematic flow sheet.
Fig. 2 is the schematic diagram that facula information of the present invention stores the hot spot set of numbering.
Fig. 3 is to there is the point of more than 2 in hot spot set and facula information is same category in the present invention
The judgement schematic diagram of the embodiment of hot spot.
The schematic diagram of several collating sequences correct in the hot spot set of Fig. 4 numbering.
The schematic diagram of the collating sequence of mistake in the hot spot set of Fig. 5 numbering.
Detailed description of the invention
Refer to shown in Fig. 1 to Fig. 5, double pens are identified by a kind of photoelectricity interaction module of the present invention
And double pen near time differentiating method, described photoelectricity interaction module has at least two photographic head, on photographic head
Being provided with optical filter, two optical filters can filter off the light of two kinds of wavelength respectively；
Described method comprises the steps:
Step 1, at least two photoelectric pens, two photoelectric pens send the light of different wave length respectively, and according to setting
Fixed waveform, bright secretly sends waveform light by a time interval；
Step 2, it is mounted the light that two photoelectric pens send by the photographic head of respective filter and has caught
Obtain；Which forms photoelectricity interaction module and be capable of the condition of the most double, i.e. one camera lens can only capture
To the hot spot of corresponding luminous pen, and the hot spot of another pen cannot be captured；
Step 3, the hot spot data captured two camera lenses respectively obtain, due to optical filter and pen
Characteristic, a camera lens can only capture the light that a photoelectric pen sends, and another camera lens can only capture another
The light that photoelectric pen sends, two camera lenses can two group data separately single-lens be carried out as two respectively
Process；
Step 4, obtain the hot spot data of each camera lens capture after, come district further according to the different bright dark waveforms of pen
Divide the interference of other light；Described hot spot data include facula position, area, and length and width information；
Step 5, two photoelectric pens are near writing, and it is close that two camera lenses can obtain two photoelectric pens respectively
Two photoelectric pens are divided into chief editor and secondary pen by hot spot, then the camera lens capturing chief editor is main lens, capture pair
The camera lens of pen is secondary mirror head, and the present frame obtaining main lens and secondary mirror head screens respectively, main lens
The frame of middle acquisition has two hot spots against close, then the hot spot obtained according to hot spot common factor mode can catch up with one
Frame data produce when occuring simultaneously, by filbtercharacteristic (i.e. can filter off the light of 2 kinds of wavelength respectively) at this
In be presumed to visible ray and infrared light, it is judged that the area of two points, (the light-transmissive main lens when secondary pen
Optical filter when seen by main lens, main lens also can only see a faint small light spot) face
Long-pending little hot spot is got rid of；Secondary mirror head is also carried out same eliminating, thus complete double pen near time distinguish.
In the present invention, write from the close place of lens location at photoelectric pen, due to the effect of optical filter
Fruit is different, can produce main lens and can see the hot spot of secondary pen, and secondary mirror head can see the hot spot of chief editor, at this moment
Need to come the hot spot of exclusive PCR by step 4.
Step 4 is particularly as follows: the complete waveform of the once pens to be received such as Shi Xian of starting to write at photoelectric pen, in waveform
The data of the corresponding frame of ripple, then click on row filter to what each frame got, such as chief editor is
3 bright 1 dark mode of operations, at the waveform that the once pens to be received such as Shi Xian of starting to write are complete, as above set chief editor
It is 3 bright 1 dark, then waits when starting to write for the first time that camera lens captures the data of 4 frames, then this 4 frame gets
Click on row filter, (i.e. one camera lens can only capture for the track moved according to photoelectric pen and the characteristic of camera lens
To the hot spot of corresponding luminous pen, and the hot spot of another pen cannot be captured；), it is judged that the light that pen produces
Whether speckle track hot spot of consecutive frame in every frame data exists common factor, is, then do not have external interference point,
If there is not common factor, then remove the external interference point that there is not common factor.
It addition, in the present invention, this step 4 also can in another way, and which is as follows:
The light that photoelectric pen sends is matched with it owing to each camera lens can only see, therefore can be 2 mirrors
Head regards independent individuality as, and each camera lens performs following steps respectively:
Step 11, a photoelectric pen are bright secretly sends hot spot, by one video input apparatus receive photoelectric pen each time
Image under between；
When step 12, currently received image have hot spot, then process currently received image, find out image
On meet size, brightness value, RGB component value exceed the hot spot of pre-set threshold value in described photoelectric pen and (i.e. should
Threshold value is a kind of hot spot pre-set in photoelectric pen；The size of this hot spot, brightness value, RGB component value
It is fixing), and the information obtaining hot spot carries out preserving (as shown in Figure 2)；The information of described hot spot
Including: spot center point coordinates, facula area, the width of hot spot and height；
Step 13, due to obtain hot spot have area, in photoelectric pen writing process produce hot spot
It it is kinestate；According to those characteristics, hot spot is carried out classifying and numbering, set up the hot spot collection of difference numbering
Close, the set of different numberings exists the facula information that normal photoelectric pen sends, also can have extraneous dry
Disturb the facula information of light；
Step 14, to the facula information being currently received, with the numbered hot spot set preserved before
It is circulated contrast；This facula information is the light speckle of at least 1；Whether 2 are had in hot spot set
Individual above point is whether to there is 1 point and light in same category hot spot, or hot spot set with facula information
Speckle information be same category hot spot, or hot spot set do not exist a little with facula information be same category light
Speckle, judges respectively；And the facula information after will determine that belongs to the hot spot set of generic numbering
In；
Step 15, all facula information searched under the hot spot set of each numbering, find out hot spot in set
Number reaches the hot spot set of predefined one group of length comparing character in photoelectric pen；This compares character
The pumped FIR laser of photoelectric pen, and judge sequence that the facula information under the hot spot set of this numbering is combined into is whether
Character is compared equal to described；It is, then by the facula information under the hot spot set of this numbering, can to conclude
It it is the hot spot that sends of which kind of corresponding photoelectric pen；No, then continue step 14.
In the present invention, described step 14 farther includes:
There is the point of more than 2 in step 141, a hot spot set numbered, then the hot spot preserved before is
Through defining the point set of movement locus, concentrate 2 up-to-date some composition straight lines with the point forming track
One, these 2 up-to-date points are 2 the light speckles finally belonged in hot spot set；Obtain current reception
Hot spot to the distance of this straight line one, and select the straight line two that distance is minimum, obtain this straight line two place
The numbering of hot spot set, the set further according to this straight line two place hot spot obtains the hot spot in this set, arrives
The point of this straight line two minimum range, to the point of straight line two minimum range and working as of acquisition in checking hot spot set
Whether the point of the hot spot of front reception is same, same, and the point for currently received hot spot have found energy
The track of pairing, then carries out the checking of the 3rd time: judge that whether currently received smooth speckle is at photoelectric pen
Movement locus on, i.e. judge described 2 up-to-date points, it was predicted that the point of symmetry on the direction vector of these 2 points
The area of last point is given to this point of symmetry；This last point is for the most finally belonging to hot spot collection
Point in conjunction；After judging front 2 checkings, the hot spot that obtains whether area with described point of symmetry also exists friendship
Collection, is that the current hot spot received is on this movement locus, and current facula information is belonged to this fortune
In the hot spot set of the numbering that dynamic track is corresponding, the current hot spot otherwise received is not on this track；
Step 141 is: when judging the ownership of new hot spot, because hot spot new when capture image can
Being 1, it is also possible to be N number of, then before form some movement locus (is i.e. above hot spot collection
The when that the queue closed having 2 or more than 2 to put), (0-N is carried out first to confirm the new hot spot of n-th
Circulation, each is the step for hot spot is carried out) from which straight line, closer (straight line here refers to
The straight line that 2 points up-to-date in each queue are formed, the most finally belongs to 2 hot spots in hot spot set
Point), that closely enters is i.e. set to straight line one, it is thus achieved that the numbering of the hot spot set of this straight line one, carries out the most again
Checking, checking here refers to this straight line one to calculate with all hot spot points newly entered, and which is seen
Point from this straight line one recently, then judges that the most unanimously (n-th hot spot point calculates this result of 2 times
This point is nearest from this straight line, and this straight line has authenticated to m-th light speckle from oneself the most in turn
Closely, it is judged that whether N is equal to M), if unanimously, this hot spot just mates the queue at this straight line place, so
After carry out the 3rd checking again, the 3rd time and tracking relevant, it is judged that whether this point in the motion of this light pen
On track, i.e. judge that the point of symmetry on the direction vector of these 2 points of 2 point predictions up-to-date in queue are up-to-date
Area of that point give these point of symmetry (here up-to-date refer to last that of last ownership
Individual point), whether the hot spot obtained after then judging front 2 checkings exists common factor with described point of symmetry；It is
Then complete the 3rd checking, only by these 3 times checkings, be only real hot spot and mated, then carry out
Judge and the simulation process of data to coding waveforms.(such as one embodiment: as it is shown on figure 3, A, B two
Point is 2 points up-to-date in the queue of hot spot set, and 2 points are formed to be had successively, and A is more Zao than B, institute
Also being directive with straight line, C point is exactly that we calculate the point on 2 direction vectors of A, B；
The region that then C point processes, the spot size of actually B point, C point is the position that we envision, then
Giving C point by the spot size of B point, D point represents that the hot spot newly entered does not matches queue, at D point
The facula area of region representation D, it is judged that whether two regions of C, D have common factor, have, thinks that D is at A, B
In the queue at some place.If do not occured simultaneously at C, then the judgement of which carries out one at B point again
Secondary, if still do not had, then it is assumed that this hot spot newly entered is not in the queue of a hot spot set；The most not
On the movement locus of this luminaire).
Step 142, judged the hot spot set of numbering exists the situation of 2 points after, if not finding receipts
The track that the current hot spot that arrives is corresponding, then continue to judge to only exist in the hot spot set of numbering the collection of 1 point
Close, i.e. judge whether the surface area of the point in the gathering surface area whether with the current hot spot received is deposited
Occuring simultaneously, be that current hot spot in this region, is belonged to the hot spot of this numbering by the current hot spot received
In set, otherwise enter step 143；
If the current hot spot that step 143 receives the most does not finds in step 141 and 142 and to match with it
Track, or some set do not have similar point, the most current hot spot is respectively put into and is not put into light
In the hot spot set of the empty numbering of speckle, form new numbering；
Step 144, circulate the numbering set of all of hot spot, and to currently not inserting the set of facula information
In fill into an index point upspring；This index point represents and does not meet receipts in hot spot set under state at that time
The current facula information arrived.
Described step 15 farther includes: having facula information to belong in the hot spot set of numbering, then and 1
The most corresponding mark having bright spot of individual facula information, this has the mark of bright spot to represent with 1, without bright spot
Mark represents with 0；Described pumped FIR laser is the comparison character of 0 and 1 composition, and to compare character length be L,
Described L is the integer more than 3；Then search for all facula information under the hot spot set of each numbering, look for
Go out hot spot number in set and reach the hot spot set of the numbering of described length L comparing character, this numbering
The mark 0 or 1 of the bright spot that facula information under hot spot set is corresponding carries out arrangement with random order and obtains one
Sequence, as long as the sequence of arrangement is as pumped FIR laser；Then believed by the hot spot under the hot spot set of this numbering
Breath, can conclude that hot spot which kind of corresponding photoelectric pen sends is (such as: the mark having bright spot is set to
1, the mark without bright spot is set to 0, it is assumed that the pumped FIR laser of photoelectric pen is [1,1,1,0], if a numbering
Facula information under Ji He exists 31 and 10, no matter 0 and 1 arranges in what order, all thinks
It defines pumped FIR laser (as shown in Figure 4), if less than 4 facula information, skips wait and fills up 4
Carry out again after facula information judging pumped FIR laser, meet and then start to judge pumped FIR laser when there is 4 facula information,
If the number of 1 and 0 is not to (as shown in Figure 5), then it is assumed that be formed without coding, it is formed without the volume of coding
Number set, if there are 4 information, then information is emptied, abandons).
When facula information under step 16, the hot spot set numbered preserves, as in figure 2 it is shown, fill out when meeting
After the data volume that full hot spot set is constituted (if the data volume of hot spot set is 4), when being further filled with data,
First to discard the facula information (being first facula information in hot spot set the earliest) preserved the earliest,
Add new facula information.(such as: the data storage of hot spot set is considered a queue (when
So also having other form) principle of queue is exactly first in first out, and such as our coding is bright 3 dark 1
(set bright spot as 1, be 0 time dark), we just set the size of this queue as 4, after queue is piled,
Whether the order judging queue is 1110, if it is, judge that this light pen has fallen on blank, so
After along with the motion of light pen, a point of every time coming in, when after this Point matching to this pen we according to team
Row principle removes the 1 of foremost, adds up-to-date point backmost and (is at this time likely to be formed 1101 in queue
This coding), if queue meets 1 dim spot of 3 bright spots situation (wave as sinusoidal) I
To be considered as coding be normal, this point carries out processing at once goes out a simulation.)
After determining the hot spot that corresponding luminaire sends；Corresponding function is realized (such as photoelectricity further according to equipment
Keypress function, the writing function etc. of photoelectric pen).
The foregoing is only presently preferred embodiments of the present invention, all according to scope of the present invention patent done equal
Deng change and modification, the covering scope of the present invention all should be belonged to.
Claims (4)
1. double pens are identified by photoelectricity interaction module and double pen near time a differentiating method, it is special
Levy and be: described photoelectricity interaction module has at least two photographic head, and photographic head is provided with optical filter,
Two optical filters can filter off the light of two kinds of wavelength respectively；
Described method comprises the steps:
Step 1, at least two photoelectric pens, two photoelectric pens send the light of different wave length respectively, and according to setting
Fixed waveform, bright secretly sends waveform light by a time interval；
Step 2, it is mounted the light that two photoelectric pens send by the photographic head of respective filter and has caught
Obtain；
Step 3, the hot spot data captured two camera lenses respectively obtain, due to optical filter and pen
Characteristic, a camera lens can only capture the light that a photoelectric pen sends, and another camera lens can only capture another
The light that photoelectric pen sends, two camera lenses can two group data separately single-lens be carried out as two respectively
Process；
Step 4, obtain the hot spot data of each camera lens capture after, come district further according to the different bright dark waveforms of pen
Divide the interference of other light；
Step 5, two photoelectric pens are near writing, and it is close that two camera lenses can obtain two photoelectric pens respectively
Two photoelectric pens are divided into chief editor and secondary pen by hot spot, then the camera lens capturing chief editor is main lens, capture pair
The camera lens of pen is secondary mirror head, and the present frame obtaining main lens and secondary mirror head screens respectively, main lens
The frame of middle acquisition has two hot spots against close, then the hot spot obtained according to hot spot common factor mode can catch up with one
Frame data produce when occuring simultaneously, and pass through filbtercharacteristic, it is judged that the area of two hot spots, light little for area
Speckle is got rid of；Secondary mirror head is also carried out same eliminating, thus complete double pen near time distinguish.
Double pens are identified by photoelectricity interaction module the most according to claim 1 and double pen is close
Time differentiating method, it is characterised in that: described hot spot data include facula position, and area is, and length and width letter
Breath.
Double pens are identified by photoelectricity interaction module the most according to claim 1 and double pen is close
Time differentiating method, it is characterised in that: write from the close place of lens location at photoelectric pen, due to filter
The effect of mating plate is different, can produce main lens and can see the hot spot of secondary pen, and secondary mirror head can see the light of chief editor
Speckle, at this moment needs to come the hot spot of exclusive PCR by step 4.
Double pens are identified by photoelectricity interaction module the most according to claim 1 and double pen is close
Time differentiating method, it is characterised in that: step 4 is particularly as follows: to be received once at the photoelectric pen Shi Xian etc. that starts to write
The waveform that pen is complete, the data of the corresponding frame of a ripple in waveform, then to the point got in each frame
Screen, the track moved according to photoelectric pen and the characteristic of camera lens, it is judged that the spot tracks that pen produces exists
In every frame data, whether the hot spot of consecutive frame exists common factor, is then not have external interference point, if not depositing
Occuring simultaneously, then removing the external interference point that there is not common factor.
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| CN105653025B (en) * | 2015-12-22 | 2019-12-24 | 联想(北京)有限公司 | Information processing method and electronic equipment |
| CN106648171B (en) * | 2016-12-08 | 2019-03-08 | 南京仁光电子科技有限公司 | A kind of interactive system and method based on lettering pen |
| CN112468686A (en) * | 2019-09-09 | 2021-03-09 | 北京小米移动软件有限公司 | Camera module and mobile terminal with same |
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