CN108279788A - Control unit for remote controler - Google Patents
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- CN108279788A CN108279788A CN201810165336.1A CN201810165336A CN108279788A CN 108279788 A CN108279788 A CN 108279788A CN 201810165336 A CN201810165336 A CN 201810165336A CN 108279788 A CN108279788 A CN 108279788A
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Abstract
The invention discloses a kind of control units for remote controler, and wherein remote controler is used for obtaining distance and angle of the remote controler relative to the display in optical profile type tracing system in optical profile type tracing system, to generate corresponding coordinate；Wherein display includes reference light source, and reference light source generates known brightness change within a period, and reference light source maintains permanent bright pattern other than the period；Control unit is electrically connected the imaging sensor in remote controler, and imaging sensor is used for obtaining the consecutive image group for covering reference light source within the period；Described control unit is detected in the first period and obtains effective reference point when an object is permanent bright image, and the second period detect the object be the bright image of non-perseverance and do not meet it is described known to brightness change when judge the object for ambient noise.The present invention provides a kind of with the high resistivity of ambient noise and increases the acquirement quantity of effective reference point to increase the control unit of remote control performance.
Description
The applying date, application number and the invention and created name of original application case
The applying date of original application case is on December 23rd, 2013, and application No. is 201310720005.7 and denominations of invention
For " optical profile type object tracking method and its related optical formula tracing system ".
Technical field
The present invention relates to a kind of optical profile type object tracking method and its related optical formula tracing systems, more particularly to one kind
The control unit for remote controler with the high resistivity of ambient noise.
Background technology
Regularly switch reference point generates flasher to traditional multipoint mode object tracking method, and imaging sensor synchronizes
The consecutive image for covering reference point is obtained, controller is found out by analyzing the bright dark variation of the rule in consecutive image with reference to point
It sets, to generate the coordinate needed for object tracing remote control.The acquisition frequency of imaging sensor is synchronous with the flasher of reference point
Fault tolerance is smaller, therefore precision needed for the reference base site controller of traditional multipoint mode object tracking method is higher, synchronous control
The complexity of technology correspondingly improves product cost.In addition, mostly bright with rule in the background light source of domestic environment or working environment
Dark flashing mode is presented, but traditional multipoint mode object tracking method is difficult to correctly distinguish the ambient noise and reference that rule changes
The flasher of point.Having the time of nearly half to belong to low-potential state when reference point progress rule flicker, (light source is closed or is cut
Change low-light level into), therefore the picture number that imaging sensor obtains effective reference point can be reduced.For synthesis, traditional multipoint mode object
Method for tracing is poor for the resolution ratio for the ambient noise that rule changes, and the acquirement negligible amounts of effective reference point, has
Object tracing and the bad disadvantage of remote control performance.
Invention content
The present invention provides a kind of control unit for remote controler with the high resistivity of ambient noise, above-mentioned to solve
The problem of.
The present invention discloses a kind of control unit for remote controler, and described control unit is electrically connected the figure in the remote controler
As sensor, described image sensor is used for obtaining the consecutive image group for covering reference light source, the consecutive image group at least portion
Partial image includes an object of the corresponding reference light source；When the object is in being maintained a permanent bright image in a period of time, then
Described control unit judges the object for effective reference point, and detects the object in the second period and be the bright image of non-perseverance and be not inconsistent
Judge the object for ambient noise when closing known brightness change.
In a further embodiment, the remote controler is used for obtaining the remote controler in optical profile type tracing system opposite
The distance and angle of display in the optical profile type tracing system, to generate corresponding coordinate；The display includes institute
Reference light source is stated, the reference light source generates the known brightness change within a period, and the reference light source is when described
Permanent bright pattern is maintained other than section.
In a further embodiment, the display further includes the first communication unit, is electrically connected the reference light source, institute
It further includes the second communication unit to state remote controler, is electrically connected described control unit, and described control unit utilizes second communication unit
It is first to drive the reference light source to generate the known brightness change with first communication unit.
In a further embodiment, described control unit calculates the period in a random basis or according to default algorithm
Length and time point；Preferably, described control unit is poor by the random time for calculating gained often after more than one predetermined period
With regard to driving the reference light source to generate the known brightness change.
In a further embodiment, the duty ratio of described image sensor is long less than the time of the known brightness change
Degree.
Invention additionally discloses a kind of control unit for remote controler, described control unit is electrically connected in the remote controler
Imaging sensor, described image sensor are used for obtaining the consecutive image group for covering reference light source, and the consecutive image group is at least
Parts of images includes an object of the corresponding reference light source；When the object is in being maintained a permanent bright image in a period of time,
Then described control unit judges the object for effective reference point, and it is the bright image of non-perseverance and symbol to detect the object in the third period
Judge the object for reference light source when closing known brightness change.
In a further embodiment, the remote controler is used for obtaining the remote controler in optical profile type tracing system opposite
The distance and angle of display in the optical profile type tracing system, to generate corresponding coordinate；The display includes institute
Reference light source is stated, the reference light source generates the known brightness change within a period, and the reference light source is when described
Permanent bright pattern is maintained other than section.
In a further embodiment, the display further includes the first communication unit, is electrically connected the reference light source, institute
It further includes the second communication unit to state remote controler, is electrically connected described control unit, and described control unit utilizes second communication unit
It is first to drive the reference light source to generate the known brightness change with first communication unit.
In a further embodiment, described control unit calculates the period in a random basis or according to default algorithm
Length and time point；Preferably, described control unit is poor by the random time for calculating gained often after more than one predetermined period
With regard to driving the reference light source to generate the known brightness change.
In a further embodiment, the duty ratio of described image sensor is long less than the time of the known brightness change
Degree.
The object that the present invention can utilize the reference light source flickered at random effectively to promote the control unit for remote controler chases after
Track efficiency, and the software and hardware for simplifying optical profile type tracing system is equipped with to reduce product cost.
Description of the drawings
Fig. 1 is the schematic diagram of the optical profile type tracing system of the embodiment of the present invention.
The reference light source of Fig. 2 embodiment of the present invention and the waveform comparison figure of imaging sensor.
Fig. 3 is the flow chart of the optical profile type object tracking method of first embodiment of the invention.
Fig. 4 is the flow chart of the optical profile type object tracking method of second embodiment of the invention.
Wherein, the reference numerals are as follows：
10 optical profile type tracing systems
12 displays
14 remote controlers
16 reference light sources
18 imaging sensors
20 control units
22 first communication units
24 second communication units
W1 ambient noises
Brightness change known to W2
The acquisition frequency of W3 imaging sensors
First periods of t1
Second periods of t2
The t3 third periods
I delay-time differences
Step 300,302,304,306,308,310,312
Step 400,402,404,406,408,410,412
Specific implementation mode
Referring to Fig. 1, Fig. 1 is the schematic diagram of the optical profile type tracing system 10 of the embodiment of the present invention.Optical profile type tracing system
10 include display 12 and remote controler 14.Remote controler 14 is used for obtaining distance and angle of the remote controler 14 relative to display 12
Degree, and generate respective coordinates and be remotely controlled.Display 12 include reference light source 16, be generally arranged at display 12 upper end or
It is lower end.Remote controler 14 includes imaging sensor 18 and control unit 20, and control unit 20 is electrically connected imaging sensor 18.Ginseng
Examining light source 16 can export with the optical signal that can recognize feature, such as with specific flicker rate or in the light of specific time period flicker
Signal generates known brightness change.Imaging sensor 18 obtains the consecutive image group for covering reference light source 16.Control unit 20
Machine is changed to imaging sensor 18 with the characteristics of image for analyzing consecutive image group, is therefrom found out and is met 16 brightness change of reference light source
Image, and judge the location information of reference light source 16 in the picture, learn the reference point needed for optical tracking technology.
The present invention proposes a kind of dynamical noise removal technology.Reference light source 16 can preferably maintain permanent bright pattern,
And (off mode) is closed within a period according to the interference cases of ambient noise and once or for several times become to generate known brightness
Change, obtains and analyze for remote controler 14.After the completion of known brightness change, reference light source 16 is then returned to permanent bright pattern.The present invention
In a random basis or default algorithm calculates the period characteristic of known brightness change, such as the persistence length of period or triggered time
Point or can also include (or the one group of continuous bright dark change of persistence length and trigger time together in some embodiments
Change), therefore known brightness change can be aperiodicity or periodic regular signals.The brightness change of reference light source 16 is
The known parameters of remote controler 14, remote controler 14 can distinguish the difference of reference light source 16 and other ambient noises easily.Special one
It is mentioned that, 16 selectivity of reference light source can be set in maximum brightness, secondary high brightness or low-light level state by permanent bright pattern.With reference to
The brightness value of light source 16 is not required to be limited in particular range, every to maintain perseverance is bright (to imply that non-within the period reference light source 16
Closed state), come under the design scope of the present invention.Known brightness change may include a variety of state sample implementations.For example, it refers to
Reference light source 16 is momentarily closed within the selected period in light source 16 so that reference light source 16 has complete dark time span fixed known
Brightness change；Or the repeat switch reference light source 16 within the selected period so that reference light source 16 have it is bright secretly change it is fixed
Known brightness change, it is so without being limited thereto；Certainly, it can also only allow reference light source 16 to generate two different brightness within the period to become
Change, such as the first brightness with permanent bright pattern same brightness, arranges in pairs or groups as the second brightness of permanent bright one half intensity of pattern；Or also may be used
To be the first brightness with permanent bright pattern same brightness, non-luminous second brightness of arranging in pairs or groups (i.e. brightness is 0).
If the time for exposure of imaging sensor 18 covers the high potential state (permanent bright pattern) of reference light source 16 simultaneously
With low-potential state (the non-bright image of perseverance), control unit 20 is difficult to accurately judge the characteristic of characteristics of image variation.Imaging sensor
18 duty ratio is preferably smaller than the persistence length (shut-in time for implying that reference light source 16) of known brightness change, it is ensured that figure
Effective non-bright image of perseverance of low-light level is closed or is adjusted to as sensor 18 can obtain reference light source 16 within the unit exposure time,
Such as the unit exposure time of imaging sensor 18 is less than the most short shut-in time of reference light source 16.When the brightness of reference light source 16
Variation is the known parameters of remote controler 14, control unit 20 can be found out from the consecutive image group of imaging sensor 18 meet it is known
The characteristics of image of brightness change changes, and characteristics of image variation can be with the acquisition time and quantity of the permanent bright image of right and wrong (or only
Obtain time or only quantity).When the acquisition time of the non-bright image of perseverance and (or) quantity meet known brightness change, control
Unit 20 judges that the object with known brightness change is reference light source 16 in the non-bright image of perseverance, obtains optical tracking reference point.
Wherein, the other characteristics of image for not meeting known brightness change are typically ambient noise, directly exclude to be not required to taken into consideration.
Referring to Fig. 2, Fig. 2 is the waveform comparison figure of the reference light source 16 and imaging sensor 18 of the embodiment of the present invention.Ring
Border noise W1 can be rule or irregular blinking light, and the known brightness change W2 of reference light source 16 is in a random basis
Or it is generated according to default algorithm.Special one is mentioned that, reference light source 16 maintains permanent bright pattern when being not required to execution object tracing,
When control unit 20 can not read true reference point, reference light source 16 just will produce known brightness change W2, for control unit
The characteristics of image variation of the known brightness change W2 of 20 identifications, decides whether the predetermined function for starting optical profile type object tracing.Therefore,
Known brightness change W2 is preferably aperiodicity change, and the generation time point of characteristics of image is indefinite.Optical profile type tracing system 10
Known period characteristic only has persistence lengths and trigger time of the known brightness change W2 in low-potential state (Off mode).
The acquisition frequency W3 higher of imaging sensor 18, duty ratio are long less than the time of the low-potential state of known brightness change W2
Degree.The known brightness change W2 of reference light source 16 need not be synchronous with the acquisition frequency W3 of imaging sensor 18.Reference light source 16
As long as known brightness change W2 is generated in segment limit when loose, imaging sensor 18 can recognize easily ambient noise W1 with
The difference of known brightness change W2 and find out reference point.
As shown in Fig. 2, reference light source 16 at the first period t1 in permanent bright pattern (On mode), imaging sensor 18 exists
The bright image (high-brghtness picture images) of perseverance that first period t1 is shot, can be used to obtain effective reference point.Imaging sensor 18 exists
Second period t2 can get the non-bright image of perseverance (low-light level or complete dark image), however the non-bright image of perseverance that the second period t2 is obtained
Known brightness change W2 is not met, control unit 20 judges that these non-bright images of perseverance are the corresponding low potential shapes in ambient noise W1
State (Off mode).Although noise is closed when the second period t2, reference light source 16 still maintains permanent bright pattern, at this time
Control unit 20 can recognize individually different characteristics of image, imply that and judge that one of object images (reference light source 16) are still permanent
Bright pattern, and judge that another object images (ambient noise) is the non-bright pattern of perseverance.Imaging sensor 18 is in third period t3
The non-bright image of perseverance (low-light level or complete dark image) is got, control unit 20 is also to be sentenced for the individual objects in image
It is disconnected, such as identification process of aforementioned second period t2.Judge that the non-bright pattern of perseverance of one of object images meets known brightness and becomes
It when changing the low potential feature of W2, can confirm that the object is exactly reference light source 16, and calculate reference light source 16 in the picture
Location information.Wherein, third period t3 is in addition to being that reference light source 16 keeps the closing of certain time (complete dark time span is spy
Definite value) other than, can also be the bright dark variation of specific frequency.
Reference light source 16 can utilize two ways to generate known brightness change.The first embodiment of the present invention is by remote controler
14 driving reference light sources 16 generate known brightness change, and second embodiment is then that display 12 voluntarily drives reference light source 16 to generate
Known brightness change.As shown in Figure 1, display 12 further includes the first communication unit 22, it is electrically connected reference light source 16.Remote controler 14
Further include the second communication unit 24, is electrically connected control unit 20.In first embodiment, control unit 20 is via the first communication unit
22 and second communication unit 24 output a control signal to display 12.Control signal in transmittance process may because system voltage,
The environmental factors such as temperature, humidity have system delay time difference I.Reference light source 16 executes known brightness according to control signal and becomes
Change, imaging sensor 18 correspondingly obtains relevant consecutive image group.Then, control unit 20 is considered prolongs including aforementioned system
Because after, it is reference that can be picked out from consecutive image group and generate the object of known brightness change for the controllable change of slow time difference I
Light source 16.
In a second embodiment, reference light source 16 can voluntarily generate known brightness change, and pass through the first communication unit 22
Notification information is transmitted to remote controler 14 with the second communication unit 24.Notification information starts imaging sensor 18 and obtains consecutive image
Group.Then, it calculates passing time and system delay time difference I of notification information etc. to become because after, control unit 20 can filter out
Ambient noise, it is reference light source 16 to be picked out from consecutive image group and generate the object of known brightness change.
Referring to Fig. 3, Fig. 3 is the flow chart of the optical profile type object tracking method of first embodiment of the invention.It is shown in Fig. 3
Optical profile type object tracking method is suitable for Fig. 1 and optical profile type tracing system 10 shown in Fig. 2.Step 300, reference light is first carried out
Source 16 maintains permanent bright pattern.Then, step 302 is executed to step 306, and in a random basis or algorithm calculates triggering reference light source
16 period, the output of control unit 20 control signal to drive reference light source 16 to generate known brightness change within the period, and
18 synchronous averaging of imaging sensor to obtain consecutive image group in real time.Then, step 308 is executed, control unit 20 is relatively more continuous
The pattern difference of image group and known brightness change is believed with judging whether to need to calculate the position of reference light source 16 in the picture
Breath.When the non-bright image of perseverance of consecutive image group does not meet known brightness change, control unit 20 does not recognize different object diagrams
Picture judges that reference light source 16 is still permanent bright pattern, and characteristics of image variation is that the ambient noise of the non-bright pattern of perseverance causes, and control is single
Member 20 does not calculate the location information of reference light source 16, is returned to step 302.The non-bright image of perseverance of consecutive image group meets known bright
When degree variation, judges that reference light source 16 switches to the non-bright pattern of perseverance, execute step 310, control unit 20 can pick out reference light
Source 16, calculates and the location information for exporting reference light source 16 is used as object tracing coordinate to display 12.Finally, step is executed
312, after triggering the period, reference light source 16 is returned to permanent bright pattern by control unit 20.
Referring to Fig. 4, Fig. 4 is the flow chart of the optical profile type object tracking method of second embodiment of the invention.It is shown in Fig. 4
Optical profile type object tracking method is suitable for Fig. 1 and optical profile type tracing system 10 shown in Fig. 2.Step 400, reference light is first carried out
Source 16 maintains permanent bright pattern.Then, it executes step 402 and arrives step 406, in a random basis or algorithm calculates reference light source 16
The period is triggered, voluntarily generates known brightness change within the period by reference light source 16, and utilize the first communication unit 22 and second
Communication unit 24 exports notification information to remote controler 14, to drive imaging sensor 18 to obtain corresponding consecutive image group.Then,
Step 408 is executed, control unit 20 compares whether consecutive image group is consistent with known brightness change, to judge whether to need to calculate
The location information of reference light source 16 in the picture.When the non-bright image of perseverance of consecutive image group does not meet known brightness change, reply
To step 402.When the non-bright image of perseverance of consecutive image group meets known brightness change, step 410 is executed, control unit 20 calculates
And the location information of reference light source 16 is exported as object tracing coordinate.Finally, step 412 is executed, reference light source 16 voluntarily returns
It is multiple to arrive permanent bright pattern.Second embodiment different from the first embodiment is that the processor of reference light source 16 can be used to execute step
402-406 with the switching of brightness change known to progress and permanent bright pattern, and notifies remote controler 14 the multiple by communication unit
The feature of known brightness change.
The optical profile type object tracking method and its related optical formula tracing system of the present invention maintains reference light source permanent bright
Pattern.Reference light source generates known brightness change according to default algorithm, indicates correctly obtain effective reference when control unit
When point, reference light source can be triggered and generate known brightness change in specific time period, and remote controler is allowed to carry out reference light source
Location identification and correction.Reference light source generates known brightness change in a random basis, after indicating at interval of a predetermined period, ginseng
As soon as examining, light source calculates and acquirement group random time is poor, and known brightness change is automatically generated by random time difference.In other words,
The flasher that the reference light source of the present invention not instead of rule changes, according to the disturbed condition of ambient noise or stochastic arithmetic knot
Fruit generates brightness change, and this brightness change characteristic is the known parameters of remote controler.It is dodged since reference light source does not need rule
Bright, optical profile type tracing system can greatly improve the opening time (permanent bright pattern) of reference light source, increase taking for effective reference point
Obtain quantity.Present invention only require that reference light source is generated in specific time period (whether sensing the period obtained obtained by noise or at random)
Brightness change, reference light source need not execute synchronous control with imaging sensor, therefore can simplify the control complexity of reference light source,
Effectively reduce the manufacturing cost of display.
For synthesis, the present invention can effectively promote the object of optical profile type tracing system using the reference light source flickered at random
Tracking efficiency and the software and hardware for simplifying optical profile type tracing system are equipped with to reduce product cost.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of control unit for remote controler, which is characterized in that
Described control unit is electrically connected the imaging sensor in the remote controler, and described image sensor is used for obtaining covering reference
The consecutive image group of light source, the consecutive image group at least partly image include an object of the corresponding reference light source；Work as institute
Object is stated in being maintained a permanent bright image in a period of time, then described control unit judges the object for effective reference point, and
Detect that the object is the bright image of non-perseverance and while not meeting known brightness change judges the object for ambient noise in the second period.
2. control unit according to claim 1, which is characterized in that the remote controler is used in optical profile type tracing system
Distance and angle of the remote controler relative to the display in the optical profile type tracing system are obtained, to generate corresponding seat
Mark；The display includes the reference light source, and the reference light source generates the known brightness change, institute within a period
It states reference light source and maintains permanent bright pattern other than the period.
3. control unit as claimed in claim 2, which is characterized in that the display further includes the first communication unit, is electrically connected
The reference light source is connect, the remote controler further includes the second communication unit, is electrically connected described control unit, described control unit profit
The reference light source is driven to generate the known brightness change with second communication unit and first communication unit.
4. control unit as claimed in claim 2, which is characterized in that described control unit is calculated in a random basis or according to acquiescence
Method calculates length and the time point of the period；Preferably, described control unit is often after more than one predetermined period, by calculating
The random time difference of gained just drives the reference light source to generate the known brightness change.
5. control unit as described in claim 1, which is characterized in that the duty ratio of described image sensor is less than described known
The time span of brightness change.
6. a kind of control unit for remote controler, which is characterized in that
Described control unit is electrically connected the imaging sensor in the remote controler, and described image sensor is used for obtaining covering reference
The consecutive image group of light source, the consecutive image group at least partly image include an object of the corresponding reference light source；Work as institute
Object is stated in being maintained a permanent bright image in a period of time, then described control unit judges the object for effective reference point, and
Detect that the object is the bright image of non-perseverance and while meeting known brightness change judges the object for reference light source in the third period.
7. control unit according to claim 6, which is characterized in that the remote controler is used in optical profile type tracing system
Distance and angle of the remote controler relative to the display in the optical profile type tracing system are obtained, to generate corresponding seat
Mark；The display includes the reference light source, and the reference light source generates the known brightness change, institute within a period
It states reference light source and maintains permanent bright pattern other than the period.
8. control unit as claimed in claim 7, which is characterized in that the display further includes the first communication unit, is electrically connected
The reference light source is connect, the remote controler further includes the second communication unit, is electrically connected described control unit, described control unit profit
The reference light source is driven to generate the known brightness change with second communication unit and first communication unit.
9. control unit as claimed in claim 7, which is characterized in that described control unit is calculated in a random basis or according to acquiescence
Method calculates length and the time point of the period；Preferably, described control unit is often after more than one predetermined period, by calculating
The random time difference of gained just drives the reference light source to generate the known brightness change.
10. control unit as claimed in claim 6, which is characterized in that the duty ratio of described image sensor be less than it is described
Know the time span of brightness change.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810165336.1A CN108279788B (en) | 2013-12-23 | 2013-12-23 | Control unit for remote controller |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810165336.1A CN108279788B (en) | 2013-12-23 | 2013-12-23 | Control unit for remote controller |
| CN201310720005.7A CN104731310B (en) | 2013-12-23 | 2013-12-23 | Optical profile type object tracking method and its related optical formula tracing system |
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| CN201310720005.7A Division CN104731310B (en) | 2013-12-23 | 2013-12-23 | Optical profile type object tracking method and its related optical formula tracing system |
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Cited By (1)
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| CN109559488A (en) * | 2018-11-30 | 2019-04-02 | 广东美的制冷设备有限公司 | Control method, remote terminal, household appliance, system and storage medium |
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| US10372155B2 (en) | 2017-08-20 | 2019-08-06 | Pixart Imaging Inc. | Joystick and related control method |
| US10969878B2 (en) | 2017-08-20 | 2021-04-06 | Pixart Imaging Inc. | Joystick with light emitter and optical sensor within internal chamber |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN104731310B (en) | 2018-03-30 |
| CN104731310A (en) | 2015-06-24 |
| CN108279788B (en) | 2021-02-02 |
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