CN103196551B - Light source device for identifying, light source discrimination method and optical tracking device - Google Patents
Light source device for identifying, light source discrimination method and optical tracking device Download PDFInfo
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Abstract
The invention discloses a kind of light source device for identifying, may be used to whether identification one light source is a particular type light source, this light source device for identifying comprises: filter element, comprise one first district and one second district, wherein this firstth district only can allow the light with a characteristic frequency pass through, and this secondth district can allow have the light of this characteristic frequency and have the light of other frequency and pass through；Image sensing chip, in order to scan-image；And judging unit, in order to calculate, according to this image, the light quantity that this light source is formed in this firstth district and this secondth district, and judge whether this light source is this particular type light source according to this light source in this light quantity that this firstth district and this secondth district are formed.
Description
Technical field
The present invention relates to a kind of light source device for identifying, light source discrimination method and optical tracking device, especially
About a kind of can the light source device for identifying of identification particular type light source and light source discrimination method and can basis
Light source type identification result carries out the optical tracking device of object tracing.
Background technology
Fig. 1 depicts the schematic diagram of noise light source interference optical tracking device tracing object in prior art.
In prior art, optical tracking device can capture at least one image of the object image being intended to tracing object and count
Calculating its position or moving coordinate, this is intended to tracing object itself and just can be considered a light source, can send specific frequency
The light of rate.As a example by Fig. 1, optical tracking device can launch one in order to tracing object 101, object 101
Infrared light, but, in the middle of the image that optical tracking device captures, other noise light may be comprised
Source such as light sources 103,105 etc., it is probably other light source such as ambient light, daylight lamp.These light sources are usual
The light of infrared light and other composition can be comprised, it is thus possible to influence whether optical tracking device tracing object
The accuracy of 101.
Summary of the invention
It is an object of the present invention to provide a kind of can the light source device for identifying of identification particular type light source and light
Source discrimination method, to solve the problem that non-required light has influence on optical tracking precision.
It is a further object to provide one and can carry out object tracing according to light source type identification result
Optical tracking device, to solve the problem that non-required light has influence on optical tracking precision.
One embodiment of the invention discloses a kind of light source device for identifying, may be used to whether identification one light source is one
Particular type light source, this light source device for identifying comprises: filter element, comprises one first district and one second
District, wherein this firstth district only can allow the light with a characteristic frequency pass through, and this secondth district can allow and have this
The light of characteristic frequency and there is the light of other frequency pass through；Image sensing chip, in order to scan-image；
And judging unit, formed in this firstth district and this secondth district in order to calculate this light source according to this image
Light quantity, and this light quantity formed in this firstth district and this secondth district according to this light source judges this light
Whether source is this particular type light source.
Another embodiment of the present invention discloses a kind of optical tracking device, in order to follow the trail of an object, this object
Can provide the light with a characteristic frequency, this optical tracking device comprises: casing；Lens, are positioned at this machine
On shell；Image sensing chip, in order to capture at least the one of the object image comprising this object by these lens
Image；Filter element, comprises at least one first district and at least one second district, and light is by this firstth district
With this secondth district respectively in this image acquired by this image sensing chip produce one first district's imagery zone with
And one second district's imagery zone, wherein this firstth district only can allow the light with this characteristic frequency pass through, and is somebody's turn to do
Secondth district can allow have the light of this characteristic frequency and have the light of other frequency and pass through；And judging unit,
In order to according to this firstth district imagery zone and the light quantity of this secondth district imagery zone, to judge this object shadow
As the image space at this image.
Whether another embodiment of the present invention discloses a kind of light source discrimination method, may be used to identification one light source and be
One particular type light source, this light source discrimination method comprises: a filter element is distinguished at least one first district
And at least one second district, wherein this firstth district only can allow the light with a characteristic frequency pass through, and this
2nd district can allow have the light of this characteristic frequency and have the light of other frequency and pass through；And with an image sense
Survey chip scanning image, in this firstth district and be somebody's turn to do to allow a judging unit calculate this light source according to this image
The light quantity that secondth district is formed, and this light formed in this firstth district and this secondth district according to this light source
Amount judges whether this light source is this particular type light source.
Whether another embodiment of the present invention discloses a kind of light source device for identifying, may be used to identification one light source and be
One particular type light source, this light source device for identifying comprises: image sensing chip, in order to scan-image, tool
Having an image sensing array, this image sensing array comprises at least one first district and at least one second district,
Wherein this firstth district only can allow the light with a characteristic frequency pass through, and this secondth district can allow, and to have this specific
The light of frequency and there is the light of other frequency pass through；And judging unit, in order to according to this light source at this
The light quantity that firstth district and this secondth district are formed, judges whether this light source is this particular type light source.
Via aforesaid embodiment, simple structure is used just to can determine whether out the type of light source, and then accurately
Tracing object.During additionally, use image sensing chip, by adjusting frequency and the scanning of image scan
Area, can allow and judge the action of light source type more efficiently.
Accompanying drawing explanation
Fig. 1 depicts the schematic diagram that in prior art, noise light source objects interfered is followed the trail of.
Fig. 2 illustrates the structural representation of optical tracking device according to embodiments of the present invention.
Fig. 3 and Fig. 4 depicts the knot of the filter element being usable in the optical tracking device shown in Fig. 2 respectively
Structure schematic diagram.
5th figure depicts light source discrimination method flow chart according to embodiments of the present invention.
Wherein, description of reference numerals is as follows:
101 objects
103,105 light source
200 optical tracking devices
201 casing
203 lens
205 image sensing chips
207,209 filter element
211 judging units
213 circuit boards
301-409 filter element region
Detailed description of the invention
Some vocabulary is employed to censure specific element in the middle of description and claim above.Institute
Genus field has usually intellectual it is to be appreciated that hardware manufacturer may be called with different nouns
Same element.This specification and claim above are not used as distinguishing element with the difference of title
Mode, but with element difference functionally be used as distinguish criterion.In description in the whole text and front
" comprising " mentioned in the middle of the claim in face is an open term, therefore should be construed to " comprise
But it is not limited to ".
Fig. 2 illustrates optical tracking device 200 structural representation according to embodiments of the present invention, and this optics chases after
Track device 200 may be used to follow the trail of an object, and this object can provide the light with a characteristic frequency, such as Fig. 1
In object 101.It is noted that subsequent embodiment all represents the light of characteristic frequency with infrared light,
But and the content that the non-limiting present invention proposes only is limited on infrared light.
As in figure 2 it is shown, optical tracking device 200 can comprise: 201, lens 203 of a casing,
One image sensing chip 205, filter element 207 and 209 at least one, a judging unit 211
And a circuit board 213.Lens 203 are positioned in casing 201.Image sensing chip 205 is in order to logical
Cross at least one image that lens 203 capture the object image of object.Filter element 207,209 comprises at least
One first district and at least one second district, light passes through the firstth district with the secondth district respectively at image sensing chip
Image acquired by 205 produces one first district's imagery zone and one second district's imagery zone, wherein filters
Firstth district of element 207,209 only can allow infrared light pass through, and the secondth district can allow infrared light and have it
The light of its frequency passes through.Indication has the light of other frequency herein, can refer to owning in addition to infrared ray
The light of frequency, the some being also referred to as outside infrared ray has the light of frequency.
The arrangement mode in the firstth district and the secondth district can present in every way, can be depending on optical tracking device
Design, or coherent video process step program.Refer to Fig. 3 and Fig. 4, it depicts respectively
Use is at the structural representation of the filter element 207 and 209 of the optical tracking device shown in Fig. 2.Fig. 3
Shown filter element 207 is to present stripe-arrangement and be arranged on lens 203.As it is shown on figure 3, filter
Optical element region 301,303,305,307 etc. represents the firstth district that infrared light only can be allowed to pass through, and filters
Optical element region 302,304 and 306 etc. represents and other light outside infrared light and infrared light can be allowed to lead to
The secondth district crossed.Filter element 209 shown in Fig. 4 is to present checkerboard arrangement and be arranged on image sensing
On chip 205.As shown in Figure 4, filter element region 401,403 etc. represent and infrared light only can be allowed to lead to
The firstth district crossed, and filter element region 405,407 and 409 etc. represent and can allow infrared light and red
The secondth district that other light outside outer light passes through.The firstth district and the secondth district in Fig. 4 only have part with symbol
Indicate.Please note that the arrangement of aforesaid all types of filter element and its position is set the most only in order to illustrate,
It is not limited to the present invention.Optical tracking device 200 in Fig. 2 is also not intended to comprise simultaneously
Filter element 207 and 209.Filter element 209 can be arranged at image sensing chip 205 in every way
On, it is thus possible to there is various thickness or formed by different materials.The most therefore, when image sensing core
When sheet 205 has the function of optical filtering, can be considered that there is an image sensing array, this image sensing array bag
Containing at least one first district and at least one second district, wherein the firstth district only can allow and have the light of a characteristic frequency
Pass through, and the secondth district can allow have the light of this characteristic frequency and have the light of other frequency and pass through.Judge
Unit 211 in order to the light quantity formed in the firstth district and the secondth district according to light source, is sentenced the most as previously mentioned
Whether this light source disconnected is particular type light source.
Judging unit 211, according to this firstth district imagery zone and the light quantity of this secondth district imagery zone, comes
Judge this object image image space at this image of this object.It is to say, judging unit 211
According to first district's imagery zone and the light quantity of this secondth district imagery zone, judge that received light source is
After being intended to the object followed the trail of, judge this object image imaging at this image of this object the most more accurately
Position.
Judging unit 211 can be implemented by hardware or a piece of wood serving as a brake to halt a carriage body mode.For example, it can be an independence
Circuit, be arranged at together with image sensing chip 205 on circuit board 213 but it also may by one judge
In the master controller of program write optical tracking device 200 (not illustrating), the most writable image sensing core
Sheet 205 and image sensing mechanism share same hardware.Under will be described in judging unit 211 how root
Judge that is just intended to follow the trail of according to the light quantity of this firstth district imagery zone and this secondth district imagery zone
The illustrative example of object.
If the light received from a light source to be judged only has infrared light composition, then this light because in the firstth district and
Secondth district all can pass through, and its difference of the light quantity therefore formed will be below a marginal value, therefore first district's shadow
As the light quantity difference of region and this secondth district imagery zone also can be corresponding below a marginal value, because of
This judging unit 211 can determine whether that it is an infrared light light source, may be the object to be followed the trail of.On the contrary
, if being intended to follow the trail of sent light entirely without infrared light composition, then can only allow infrared light passes through first
District will not produce light quantity, then can produce light quantity in the secondth district, and therefore judging unit 211 can be according to
Whether one district's imagery zone and this secondth district imagery zone have generation light quantity to judge that this light source should not be according to this
The object to be followed the trail of, or judge that this light source should not be to be intended to according to its light quantity difference more than a marginal value
The object followed the trail of.If it is to say, judging unit 211 can be in object image at first/second imagery zone
When produced light quantity difference is less than a marginal value, it is judged that this object image is a real image, and according to
This object image calculates a positional information of this object in the image space of this image.
If additionally, the object to be followed the trail of also can comprise other light of trace in addition to infrared light, then passing through
The setting of marginal value, also can determine whether out whether be the object to be followed the trail of, for example, can be returned by experiment
Receive out a marginal value, when the light quantity difference of first district's imagery zone and this secondth district imagery zone is faced at this
Time under dividing value, even if light source to be judged has the light of other composition comprised outside infrared light, also can will be surveyed
Light source judges into the object to be followed the trail of.Therefore the operation strategies of the present invention is not intended to judge pure infrared light
And the light source without infrared light.
Additionally, in one embodiment, the scheme of image sensing chip 205 scan-image and filter element 207
In the direction in the firstth district and the secondth district vertical, that is the x direction in Fig. 2, so can scan simultaneously
The image in corresponding firstth district and the secondth district is to calculate the light quantity that light source produces in zones of different.Additionally, image
All can scan with one scan region A when sensor chip 205 scans every time, if but some region of noise
Distribution of light sources is closeer, then in the excessive loaded down with trivial details or judgement being likely to result in calculating of single sweep operation region A
Mistake.If on the contrary, some region of noise light source is sparse, then the too small possibility of single sweep operation region A
Just need to scan the object that the most just can judge to be followed the trail of, cause the load of calculating and the loss of power.
Therefore, the quantity of light source during image sensing chip 205 can sense an image in an embodiment, and according to
Quantity adjusts frequency or the area size of single sweep operation of scanning, thereby plays more preferable usefulness.
Please note that the optical tracking device 200 in Fig. 2 also can be only used as a light source device for identifying, that is only
Pick out whether tested light source is particular type light source (infrared light or noise light), and do not carry out follow-up
Object tracing action.When using as light source identifying device, image sensing chip even can be need not
205, that is can only comprise a filter element and a judging unit according to the light source identifying device of the present invention.
Filter element comprises at least one first district and at least one second district.Firstth district only can allow infrared light pass through,
And the secondth district can allow infrared light and have the light of other frequency and pass through.Judging unit is in order to exist according to light source
The light quantity that this firstth district and this secondth district are formed, judges whether this light source is this particular type light source.
Light source to be measured is in the firstth district and the secondth district in order to allow judging unit judge to utilize image sensing chip to provide image
A kind of mode of formed light quantity, but as long as the mechanism of this function can be reached, all should be comprised in the present invention
In the range of.
According to aforesaid embodiment, a light source discrimination method can be summarized.Fig. 5 depicts according to the present invention
The light source discrimination method flow chart of embodiment, it comprises following steps:
Step 501
One filter element is distinguished at least one first district and at least one second district, and wherein this firstth district is only
The light (the most previously described infrared light) with this characteristic frequency can be allowed to pass through, and this secondth district can allow and have
The light of this characteristic frequency and there is the light of other frequency pass through.
Step 503
Whether the light quantity formed in this firstth district and this secondth district according to this light source, judge this light source
(such as, can determine whether that it is the light source or other having and can sending characteristic frequency for this particular type light source
The light source of type).
Other detailed step all can be derived from according to previous embodiment, therefore does not repeats them here.
Via previous embodiment, simple structure is used just to can determine whether out the type of light source, and then accurately
Tracing object.During additionally, use image sensing chip, by adjusting frequency and the scanning plane of image scan
Long-pending, can allow and judge the action of light source type more efficiently.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for this
For the technical staff in field, the present invention can have various modifications and variations.All spirit in the present invention and
Within principle, any modification, equivalent substitution and improvement etc. made, should be included in the protection of the present invention
Within the scope of.
Claims (27)
1. a light source device for identifying, may be used to whether identification one light source is a particular type light source, and this light source is distinguished
Identification device comprises:
Filter element, comprises one first district and one second district, and wherein this firstth district only can allow and have a specific frequency
The light of rate passes through, and this secondth district can allow the light with this characteristic frequency and the light with other frequency
Pass through；
Image sensing chip, in order to scan-image；And
Judging unit, in order to calculate, according to this image, the light that this light source is formed in this firstth district and this secondth district
Measure, and this light quantity formed in this firstth district and this secondth district according to this light source judges this light source
Whether it is this particular type light source.
2. light source device for identifying as claimed in claim 1, wherein this judging unit according to the light of this light source at this
The difference of light quantity that firstth district and this secondth district are formed and the relation of a marginal value are to judge this light
Whether source is this particular type light source.
3. light source device for identifying as claimed in claim 1, wherein this judging unit according to the light of this light source at this
Whether the firstth district or this secondth district have formation light quantity to judge whether this light source is this particular type light source.
4. light source device for identifying as claimed in claim 1, wherein this light source only sends and has this characteristic frequency
Light.
5. light source device for identifying as claimed in claim 4, wherein has the just infrared light of this characteristic frequency.
6. light source device for identifying as claimed in claim 1, wherein this firstth district and this secondth district are in this optical filtering
Checkerboard arrangement is presented on element.
7. light source device for identifying as claimed in claim 1, wherein this firstth district and this secondth district are in this optical filtering
Stripe-arrangement is presented on element.
8. light source device for identifying as claimed in claim 1, wherein the direction of this image sensing chip scanning with should
Firstth district and this secondth district are vertical.
9. light source device for identifying as claimed in claim 1, wherein this image sensing chip is more used for sensing a shadow
Quantity of light source in Xiang, and frequency or the area size of single sweep operation of scanning is adjusted according to this quantity.
10. an optical tracking device, in order to follow the trail of an object, this object can provide has a characteristic frequency
Light, this optical tracking device comprises:
Casing；
Lens, are positioned in this casing；
Image sensing chip, in order to capture at least one image of the object image comprising this object by these lens；
Filter element, comprises at least one first district and at least one second district, light by this firstth district with this
2nd district respectively in this image acquired by this image sensing chip produce one first district's imagery zone and
One second district's imagery zone, wherein this firstth district only can allow the light with this characteristic frequency pass through, and is somebody's turn to do
Secondth district can allow have the light of this characteristic frequency and have the light of other frequency and pass through；And
Judging unit, in order to according to this firstth district imagery zone and the light quantity of this secondth district imagery zone, to sentence
This object image disconnected is at the image space of this image.
11. optical tracking devices as claimed in claim 10, wherein this judging unit in this object image at this
Light quantity difference produced by first district's imagery zone and this secondth district imagery zone is less than a marginal value
Time, it is judged that this object image is a real image, and according to this object image in the one-tenth image position of this image
Put the positional information calculating this object.
12. optical tracking devices as claimed in claim 10, this judging unit is according to this firstth district imagery zone
And the relation of the difference of the light quantity of this secondth district imagery zone and a marginal value judges this object
This object image is at the image space of this image.
13. optical tracking devices as claimed in claim 10, this judging unit is according to this firstth district imagery zone
And whether this secondth district imagery zone has formation light quantity to judge that this object image of this object is at this
The image space of image.
14. optical tracking devices as claimed in claim 10, wherein this object only sends and has this characteristic frequency
Light.
15. optical tracking devices as claimed in claim 14, wherein have this characteristic frequency is just infrared
Light.
16. optical tracking devices as claimed in claim 10, wherein this firstth district and this secondth district are in this filter
Checkerboard arrangement is presented on optical element.
17. optical tracking devices as claimed in claim 10, wherein this firstth district and this secondth district are in this filter
Stripe-arrangement is presented on optical element.
18. optical tracking devices as claimed in claim 17, the wherein side of this image sensing chip scan-image
To vertical with this firstth district and this secondth district.
19. optical tracking devices as claimed in claim 17, this image sensing chip more senses in an image
The quantity of light source, and frequency or the area size of single sweep operation of scanning is adjusted according to this quantity.
20. 1 kinds of light source discrimination methods, may be used to whether identification one light source is a particular type light source, this light source
Discrimination method comprises:
One filter element is distinguished at least one first district and at least one second district, and wherein this firstth district only can allow
The light with a characteristic frequency passes through, and this secondth district can allow and has the light of this characteristic frequency and have
The light of other frequency passes through；And
With an image sensing chip scan-image, with allow a judging unit according to this image calculate this light source this
The light quantity that one district and this secondth district are formed, and according to this light source in this firstth district and this secondth district
This light quantity formed is to judge whether this light source is this particular type light source.
21. light source discrimination methods as claimed in claim 20, further include: according to the light of this light source this first
The difference of light quantity that district and this secondth district are formed and the relation of a marginal value are to judge that this light source is
No for this particular type light source.
22. light source discrimination methods as claimed in claim 20, further include: according to the light of this light source this first
Whether district or this secondth district have formation light quantity to judge whether this light source is this particular type light source.
23. light source discrimination methods as claimed in claim 20, wherein this light source only sends and has this characteristic frequency
Light.
24. light source discrimination methods as claimed in claim 23, wherein have this characteristic frequency is just infrared
Light.
25. light source discrimination methods as claimed in claim 20, wherein this firstth district and this secondth district are in this filter
Presenting stripe-arrangement on optical element, the direction wherein scanned is vertical with this firstth district and this secondth district.
26. light source discrimination methods as claimed in claim 25, further include:
Sense the quantity of light source in an image with this image sensing chip, and adjust the frequency of scanning according to this quantity
Rate or the area size of single sweep operation.
27. 1 kinds of light source device for identifying, may be used to whether identification one light source is a particular type light source, this light source
Device for identifying comprises:
Image sensing chip, in order to scan-image, has an image sensing array, and this image sensing array comprises
At least one first district and at least one second district, wherein this firstth district only can allow and have a characteristic frequency
Light passes through, and this secondth district can allow have this characteristic frequency light and have other frequency light lead to
Cross；And
Judging unit, in order to the light quantity formed in this firstth district and this secondth district according to this light source, judges
Whether this light source is this particular type light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210005627.7A CN103196551B (en) | 2012-01-05 | 2012-01-05 | Light source device for identifying, light source discrimination method and optical tracking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210005627.7A CN103196551B (en) | 2012-01-05 | 2012-01-05 | Light source device for identifying, light source discrimination method and optical tracking device |
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| CN103196551A CN103196551A (en) | 2013-07-10 |
| CN103196551B true CN103196551B (en) | 2016-08-31 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101378067A (en) * | 2007-08-31 | 2009-03-04 | 明荧光学有限公司 | Characteristic spectrum identification chip, manufacturing method thereof and detection device using the chip |
| US7518715B1 (en) * | 2008-06-24 | 2009-04-14 | International Business Machines Corporation | Method for determination of efficient lighting use |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7206072B2 (en) * | 2002-10-04 | 2007-04-17 | Fujifilm Corporation | Light source type discriminating method, image forming method, method and apparatus for estimating light source energy distribution, and exposure amount determining method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101378067A (en) * | 2007-08-31 | 2009-03-04 | 明荧光学有限公司 | Characteristic spectrum identification chip, manufacturing method thereof and detection device using the chip |
| US7518715B1 (en) * | 2008-06-24 | 2009-04-14 | International Business Machines Corporation | Method for determination of efficient lighting use |
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| CF01 | Termination of patent right due to non-payment of annual fee |