CN109816074A - A kind of optical indicia point and optics motion capture system and its control method - Google Patents
A kind of optical indicia point and optics motion capture system and its control method Download PDFInfo
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- CN109816074A CN109816074A CN201810610596.5A CN201810610596A CN109816074A CN 109816074 A CN109816074 A CN 109816074A CN 201810610596 A CN201810610596 A CN 201810610596A CN 109816074 A CN109816074 A CN 109816074A
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- indicia point
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Abstract
The present invention provides a kind of optical indicia point, at least part of the optical indicia point is made of infrared absorbing material, for based on infrared optics motion capture.The present invention also provides a kind of optics motion capture systems based on the optical indicia point, include at least: optical indicia point, motion capture cameras, signal transmission apparatus and data processing stations.The present invention also provides a kind of optics motion capture control methods, comprising steps of the feedback light from least one optical indicia point is received, wherein the feedback light is weakened by infrared absorbing material on the optical indicia point.
Description
Technical field
The invention belongs to actinic material field, the optics motion capture field for being based especially on the material is specifically related to
And a kind of optical indicia point and optics motion capture system and its control method.
Background technique
Motion capture is that the technologies such as all round computer graphics, electronics, machinery, optics, a computer vision capture mesh
Limbs, the expression, the three-dimensional data of movement generation of object are marked, and to the technical method that data are analyzed.Currently, motion capture
Technology continues to develop, and common motion capture can be divided into mechanical, acoustics formula, electromagnetic type, optical profile type.Optical profile type motion capture
It is to be moved from different perspectives to the monitoring of target feature point and tracking based on principle of computer vision by multiple high speed cameras
Make the technology captured.Theoretically for any one point in space, as long as it can be simultaneously for seen in two cameras, so that it may really
Fixed this moment position of point in space.It, can from image sequence when camera is continuously shot with sufficiently high rate
To obtain the motion profile of the point.This kind of system acquisition sensor is usually all optical camera, the difference is that sensor of interest class
Type is different, one is label is not added additionally on object, the joint based on two dimensional image feature or three-dimensional shape features extraction
Information can be collectively referred to as unmarked point type optics motion capture system as detection target, this kind of system, and another kind is on object
As sensor of interest, this kind of system is known as marking the motion capture of point type optics binding mark point.Optical profile type motion capture it is excellent
Point be data are accurate, capture space is big, speed is fast, calibration is simple, performing artist be limited it is small, the disadvantage is that scene light need to control.
Currently, active optical motion capture system exists and can only carry out to a certain extent for outdoor motion capture
Outdoor motion capture and have the shortcomings that capture precision it is not high enough.And passive optical motion capture system, by positive in visual field
There is the shortcomings that being unsuitable for outdoor utility in light interference.
For current drawback, we need a kind of optical indicia point, surface at least part cladding infrared absorption material
Material, is partially infrared reflective material, when place environment Infrared jamming is weaker, reflects infrared light by infrared reflective material and carries out
Positioning absorbs infrared light by infrared absorbing material and is positioned, so as to weaken when place environment Infrared jamming is stronger
Interference of the ambient light to motion capture system.
Summary of the invention
For the defects in the prior art, the object of the present invention is to provide a kind of optical indicia point and optics motion capture systems
System and its control method.
According to an aspect of the present invention, a kind of optical indicia point is provided, at least part of the optical indicia point by
Infrared absorbing material composition.
Preferably, the infrared absorbing material can be any one of following material or appoint a variety of:
Organic absorbing material；And
Inorganic absorbing material.
Preferably, the organic absorbing material includes any one of following material or appoints a variety of:
Cyanine dyes；
Phthalocyanine dye
Thio diene dyestuff；
Fragrant methane class dyestuff；And
Oxyketone dye.
Further, the inorganic absorbing material includes any one of following material or appoints a variety of:
Metal particle；
Inorganic compound；And
Semi-conductor nano particles.
Further, the organic absorbent material, the wherein preparation of cyanine dyes and thio diene nickel dyestuff mixed dye
Process flow are as follows:
A. infrared absorbing dye 0.15wt% cyanine dyes NIR775 and 0.2wt% thio diene nickel dyestuff NIR858 is added
Into methylene chloride, by magnetic agitation, uniform solution is obtained；
B. acrylic resin and resin curing agent are added in the solution containing infrared absorbing dye, continue to use magnetic force
Blender stirring, system obtain infrared ray absorbing coating material after being uniformly dispersed；
C. infrared absorption coating material is coated on optical indicia point, is coated with a thickness of 0.2mm.
Further, hyaline membrane is covered with outside the infrared absorbing material.
Further, the infrared absorbing material absorbance A (A is absorbance abbreviation) are as follows: >=0.1.
Further, the infrared absorbing material absorbance A are as follows: >=0.5.
Further, the infrared absorbing material coats area are as follows: >=1%.
Further, the infrared absorbing material is arranged at the direction towards optical identifying apparatus.
Further, the infrared absorbing material shape is axial symmetry.
Further, the infrared absorbing material on the optical indicia point is in be spaced apart with infrared reflective material.
Further, number >=1 of the infrared absorbing material on the optical indicia point.
Further, number >=2 of the infrared absorbing material on the optical indicia point.
Further, the infrared absorbing material on the optical indicia point is set as any one of situation:
It intersperses among on the optical indicia point；Or
Multiple infrared absorbing materials form a circle or triangle or quadrangle or straight line.
Another aspect of the present invention provides a kind of optics motion capture system, includes at least: optical indicia point moves
Make capture camera, signal transmission apparatus and data processing stations, and optical indicia point is aforementioned optical identification point.
Another aspect of the present invention provides a kind of optics motion capture control method, for being based on infrared carry out light
Motion capture is learned, is specifically comprised the following steps:
A. the feedback light from least one optical indicia point is received, wherein the feedback light is by the optical indicia
Infrared absorbing material weakens on point.
Further, the optical indicia point is aforementioned optical identification point.
The present invention provides one to solve the disadvantage that current motion capture system cannot effectively reduce ambient light interference
Kind optical indicia point, for additionally providing a kind of optics based on the optical indicia point based on infrared optics motion capture
Motion capture system and its optics motion capture control method, it is a feature of the present invention that at least one on optical indicia point
Infrared absorbing material is covered in subpackage, and under strong infrared luminous environment, infrared absorbing material absorbs infrared light, and motion capture camera lens is with infrared
Absorbing material part positions optical indicia point, and under the conditions of weak infrared light, infrared reflective material reflects infrared light, motion capture mirror
Head positions optical indicia point with infrared reflective material part, so that realize can accurately obtain optics under various light environments
The information of identification point is influenced small, motion capture precise and high efficiency by ambient light, has high commercial value.
Detailed description of the invention
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon:
Fig. 1 shows first embodiment according to the present invention, and infrared absorbing material intersperses among on the optical indicia point
Structural schematic diagram；
Multiple infrared absorbing materials composition one Fig. 2 shows second embodiment according to the present invention, on optical indicia point
A circular structural schematic diagram；
Fig. 3 shows third embodiment according to the present invention, multiple infrared absorbing materials composition one on optical indicia point
The structural schematic diagram of a triangle；
Fig. 4 shows fourth embodiment according to the present invention, multiple infrared absorbing materials composition one on optical indicia point
The structural schematic diagram of a quadrangle；
Fig. 5 shows fifth embodiment according to the present invention, multiple infrared absorbing materials composition one on optical indicia point
The structural schematic diagram of straight line；
Fig. 6 shows another aspect of the present invention, a kind of module diagram of optics motion capture system；
Fig. 7 shows another aspect of the present invention, a kind of flow chart of optics motion capture control method；
Fig. 8 shows the sixth embodiment of the present invention, the process flow chart of organic infrared absorbing material；
Fig. 9 shows the seventh embodiment of the present invention, and organic infrared absorbing material prepares sample；
Figure 10 shows the eighth embodiment of the present invention, and the optical indicia point under NIR756 absorbent Different adding amount is inhaled
Luminosity；
Figure 11 shows the ninth embodiment of the present invention, and the optical indicia point under NIR858 absorbent Different adding amount is inhaled
Luminosity；
Figure 12 shows the tenth embodiment of the present invention, prepares sample absorbance value and absorbent additive amount relation table；
And
Figure 13 shows the 11st embodiment of the present invention, transmitance and wavelength plot figure.
Specific embodiment
Fig. 1 shows first embodiment according to the present invention, and infrared absorbing material intersperses among on the optical indicia point
Structural schematic diagram.
Preferably, the infrared absorbing material can be any one of following material or appoint a variety of: organic absorbs material
Material；And inorganic absorbing material.It will be appreciated by those skilled in the art that organic absorbing material mainly have cyanine dyes, phthalocyanine dye,
Thio diene dyestuff, fragrant methane class dyestuff and oxyketone dye etc., wherein cyanine dyes has high molar extinction coefficient, i.e., to light
Absorbability it is stronger, the absorbing wavelength adjustable extent of cyanine dyes is larger, and inorganic absorbing material mainly has metal particle, inorganic
The absorbability of compound, semi-conductor nano particles etc., inorganic infrared absorbing material is slightly weak, but light resistance is very excellent.
Further, the specific embodiment of preparation and the performance test of organic infrared absorbing material is as follows:
1.1 raw material
Polycarbonate (3208 type of Bayer), liquid paraffin, methylene chloride, infrared absorbing dye is respectively anthraquinone dye
NIR756, thio diene nickel dyestuff NIR858.
1.2 process flow
Fig. 8 shows the sixth embodiment of the present invention, the process flow chart of organic infrared absorbing material, such as Fig. 9 institute
Show, uses dyestuff-high polymer mixing method to be dispersed in infrared absorbing dye as functional additive in polycarbonate, then
Infrared absorbing material is coated on optical indicia point.Cladding is with a thickness of 2.5mm.
1.3 performance test
As shown in Figure 10, NIR756 and NIR858 are added separately to be prepared for sample in PC material.Compare 2 kinds of absorbents
In methylene chloride with the absorbance in PC substrate.Under the premise of cladding thickness is constant, change the addition of infrared absorbing dye
Amount is prepared for a series of claddings with a thickness of 2.5mm optical indicia point, and 1#~4# adds absorbent NIR756, and 5#~8# addition is inhaled
Agent NIR858 is received, the additive amount of infrared absorbing dye is respectively 0.01wt%, 0.02wt%, 0.03wt% and 0.04wt%.Institute
The color for preparing sample shows as green, and color is constantly deepened as the additive amount of absorbent increases.
A group is to add the optics mark of 0.01wt%, 0.02wt%, 0.03wt% and 0.04wt%NIR756 absorbent respectively
Know point.B group is to add the optical indicia of 0.01wt%, 0.02wt%, 0.03wt% and 0.04wt%NIR858 absorbent respectively
Point.The absorbance value for further analyzing sample at the both ends 820nm of uptake zone and at 960nm is selected to see Figure 12.
As shown in Figure 10,11: it can be seen that, it is close red in the case where the absorbent additive amount of this experiment is horizontal (≤0.04wt%)
The absorbance and infrared absorbing dye additive amount of outer absorbing material show good linear relationship.
Further, the another specific embodiment of preparation and the performance test of organic infrared absorbing material is as follows:
2.1 raw material
Infrared absorbing dye cyanine dyes NIR775, thio diene nickel dyestuff NIR858, acrylic resin, resin curing agent,
Methylene chloride
2.2 process flow
Firstly, by infrared absorbing dye 0.15wt% cyanine dyes NIR775 and 0.2wt% thio diene nickel dyestuff NIR858
Adding into dichloromethane obtains uniform solution by magnetic agitation；Then, acrylic resin and resin curing agent are added
Enter into the solution containing infrared absorbing dye, continue to use magnetic stirrer, system obtains infrared ray after being uniformly dispersed
Absorber coatings material.Then infrared absorption coating material is coated on optical indicia point.Cladding is with a thickness of 0.2mm.
2.3 performance test
Figure 13 transmitance and wavelength plot figure
T is that (T is transmittance abbreviation, T=1/10 to transmitanceA)。
It is as shown in figure 13: to use NIR775 additive amount 0.15wt%, NIR858 additive amount 0.20wt%.By two kinds of absorbents
Mixing, which is added in matrix, is prepared for infrared absorbing material, and is coated on optical indicia point, coating thickness 0.2mm, thoroughly
It is as shown above to cross rate curve.Test shows to form a continuous and strong uptake zone in the section 700~930nm, this
Mean transmissivity in a section is 0.10%, absorbance A >=3.Infrared ray interference light can be fully absorbed, is a kind of extinction
The optical indicia point of better performances.
Further, it is covered with hyaline membrane outside the infrared absorbing material, it will be appreciated by those skilled in the art that hyaline membrane
Effect is first is that make anti-reflection infrared ray, second is that protection infrared absorbing material.
Further, the infrared absorbing material absorbance A (A is absorbance abbreviation) are as follows: >=0.1.
Further, the infrared absorbing material absorbance A are as follows: >=0.5, it will be appreciated by those skilled in the art that absorbance A is
Refer to that light passes through the transmitted intensity ratio after solution or substance with the light by the incident intensity before solution or a certain substance
The denary logarithm lg (L0/L1) of value, wherein L0 is incident intensity, and L1 is transmitted light intensity, i.e. A=lg (1/T), wherein A
For absorbance (A is absorbance abbreviation), T is transmitance (T is transmittance abbreviation).
Further, the infrared absorbing material coats area are as follows: and >=1%, it will be appreciated by those skilled in the art that infrared absorption
It is inadequate to effective absorption of infrared light when material coats area lower than 1%, when the infrared light of environment is stronger, motion-captured phase
The decaying for the identification point infrared absorbing material that machine captures is not strong, cannot utilize infrared absorbing material effective position identification point.
Further, the infrared absorbing material is arranged at the direction towards optical identifying apparatus, those skilled in the art
Member understands that infrared absorbing material is towards optical identifying apparatus, and when in illumination to optical recognized point, infrared ray can be just optically recognized
Infrared absorbing material on point absorbs, to capture athletic performance.
Further, the infrared absorbing material shape is axial symmetry, it will be appreciated by those skilled in the art that axisymmetric infrared
Absorbing material to be symmetrically, thus the optical indicia dot shape that optical identifying apparatus recognizes to the absorption of infrared ray
It is also that symmetrically, will not influence the identification to optical indicia point.
Further, the infrared absorbing material on the optical indicia point is in be spaced apart with infrared reflective material, ability
Field technique personnel understand, are spaced apart to be distributed to avoid the infrared absorbing material on optical indicia point and excessively concentrate, thus right
The absorption of infrared ray is relatively uniform, to can be positioned and be marked by infrared absorbing material when infrared ray interference is stronger in the environment
Know point, and when infrared ray is weaker in environment, it can be played the role of positioning by infrared reflective material.
Further, number >=1 of the infrared absorbing material on the optical indicia point.
Further, number >=2 of the infrared absorbing material on the optical indicia point, it will be appreciated by those skilled in the art that
Infrared absorbing material number cannot achieve the effect for effectively absorbing infrared ray very little.
Multiple infrared absorbing materials composition one Fig. 2 shows second embodiment according to the present invention, on optical indicia point
A circular structural schematic diagram, it will be appreciated by those skilled in the art that circular configuration is axially symmetric structure.
Further, other of the present embodiment require same embodiment illustrated in fig. 1, and it will not be described here.
Fig. 3 shows third embodiment according to the present invention, multiple infrared absorbing materials composition one on optical indicia point
The structural schematic diagram of a triangle, it will be appreciated by those skilled in the art that triangle can be axially symmetric structure, such as isoceles triangle
Shape, equilateral triangle.
Further, other of the present embodiment require same embodiment illustrated in fig. 1, and it will not be described here.
Fig. 4 shows fourth embodiment according to the present invention, multiple infrared absorbing materials composition one on optical indicia point
The structural schematic diagram of a quadrangle, it will be appreciated by those skilled in the art that quadrilateral structure can be axially symmetric structure, such as rectangular
Shape, square etc..
Further, other of the present embodiment require same embodiment illustrated in fig. 1, and it will not be described here.
Fig. 5 shows fifth embodiment according to the present invention, multiple infrared absorbing materials composition one on optical indicia point
The structural schematic diagram of straight line, it will be appreciated by those skilled in the art that straight line is axially symmetric structure.
Further, other of the present embodiment require same embodiment illustrated in fig. 1, and it will not be described here.
Fig. 6 is shown according to another aspect of the present invention, a kind of module diagram of optics motion capture system, specifically
Ground includes at least following module:
Optical indicia point, motion capture cameras, signal transmission apparatus and data processing stations.
Further, the motion capture equipment is high-resolution camera, charge capture optical recognized point, pick-up lens
Number >=2 can generally determine the number of video camera with the careful degree of capture.
Further, the equipment used for signal transmiting captures device to from data to complete a large amount of exercise data from movement
Manage the transmission of work station.
Further, by the data captured after correcting, handling, Overall Acquisition is crucial at the information processing work station
The multidate information of component and variable, real-time display or record playback critical component movement.
Further, the information processing work station at least has the data and letter of infrared strong decaying machine vision information
Breath processing, can be effectively reduced the interference effect of sunlight mid-infrared light, realize the motion capture under high light conditions.
Further, the optical indicia point is aforementioned optical identification point, it will be appreciated by those skilled in the art that when environment is
When weak infrared light condition, the infrared reflective material reflection infrared light on optical indicia point is obvious, and motion capture camera lens captures
Image protrudes reflected image, obtains infrared strong reflection machine vision information, information processing work station is to the infrared strong reflection machine
Visual information is handled, and when environment is strong infrared illumination condition, the infrared absorbing material on optical indicia point absorbs infrared
Light, the prominent decaying image of the image that motion capture camera lens captures, obtains infrared strong decaying machine vision information, information processing work
It stands and the infrared strong decaying machine vision information is handled.
Fig. 7 shows another aspect of the present invention, a kind of flow chart of optics motion capture control method, specifically,
Include the following steps:
S101 is entered step, the feedback light from least one optical indicia point is received, wherein the feedback light quilt
Infrared absorbing material weakens on the optical indicia point, it will be appreciated by those skilled in the art that at least part quilt on optical indicia point
Infrared absorbing material covering, when environment light is strong infrared illumination condition, as environment such as fine day, outdoor, infrared absorbing material
The infrared light in environment can be absorbed, reduce infrared external reflection intensity, therefore highlighting out on visual image is infrared suction
The image of the partial optical identification point of material is received, the partial optical identification point is gloomy, that is, obtains strong infrared attenuating machine vision letter
Breath；
When environment light is weak infrared illumination condition, as the environment such as cloudy day, interior, the infrared absorbing material of identification point are inhaled
Receive infrared light it is unobvious, feedback light weaken but it is unobvious, at this time on optical indicia point infrared reflective material part reflection it is infrared
Light is aobvious, the highlighted optical indicia point image for infrared external reflection part on visual image, and partial optical mark is pointed out
It is bright, that is, obtain strong infrared external reflection machine vision information；
For an optical indicia point, whether strong infrared illumination condition or weak infrared illumination condition, be can capture
To the position；
Similarly, for multiple optical indicia points, motion capture camera lens can carry out the multiple optical indicia point red
Outer imaging obtains the information of multiple optical indicia points, it is hereby achieved that the action message of target object, is completed to target object
The continuous record of movement.
Further, the optical indicia point is aforementioned optical identification point.
The present invention provides a kind of optical indicia points, for additionally providing a kind of base based on infrared optics motion capture
In the optics motion capture system and its optics motion capture control method of the optical indicia point, infrared light can be weakened to light
The interference for learning motion capture, realizes the optics motion capture under various illumination conditions.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited to above-mentioned
Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow
Ring substantive content of the invention.
Claims (18)
1. a kind of optical indicia point, for based on infrared optics motion capture, which is characterized in that the optical indicia point is extremely
Few a part is made of infrared absorbing material.
2. optical indicia point according to claim 1, which is characterized in that the infrared absorbing material can be following material
Any one of or appoint it is a variety of:
Organic absorbing material；And
Inorganic absorbing material.
3. optical indicia point according to claim 2, which is characterized in that the organic absorbing material includes following material
Any one of or appoint it is a variety of:
Cyanine dyes；
Phthalocyanine dye；
Thio diene dyestuff；
Fragrant methane class dyestuff；And
Oxyketone dye.
4. organic absorbent material according to claim 3, the wherein system of cyanine dyes and thio diene nickel dyestuff mixed dye
Standby process flow are as follows:
A. by infrared absorbing dye 0.15wt% (wt% is mass percent) cyanine dyes NIR775 and 0.2wt% thio diene nickel
Dyestuff NIR858 adding into dichloromethane obtains uniform solution by magnetic agitation；
B. acrylic resin and resin curing agent are added in the solution containing infrared absorbing dye, continue to use magnetic agitation
Device stirring, system obtain infrared ray absorbing coating material after being uniformly dispersed；
C. infrared absorption coating material is coated on optical indicia point, is coated with a thickness of 0.2mm.
5. optical indicia point according to claim 2, which is characterized in that the inorganic absorbing material includes following material
Any one of or appoint it is a variety of:
Metal particle；
Inorganic compound；And
Semi-conductor nano particles.
6. optical indicia point according to any one of claim 1 to 5, which is characterized in that outside the infrared absorbing material
Portion is covered with hyaline membrane.
7. optical indicia point according to any one of claim 1 to 6, which is characterized in that the infrared absorbing material is inhaled
Luminosity A are as follows: >=0.1 (A is absorbance abbreviation, and absorbance is a noun of physics and chemistry, refers to light by molten
Incident intensity before liquid or substance and light by the ratio (L0/L1) of the transmitted intensity after solution or a certain substance with
10 be the logarithm (i.e. Ig (L0/L1)) at bottom, and wherein L0 is incident intensity, and L1 is transmitted light intensity, influence it because being known as solvent, dense
Degree, temperature etc.).
8. optical indicia point according to claim 7, which is characterized in that the infrared absorbing material absorbance A are as follows: >=
0.5。
9. optical indicia point according to any one of claim 1 to 8, which is characterized in that the infrared absorbing material packet
Clad can product are as follows: >=1%.
10. optical indicia point according to any one of claim 1 to 9, which is characterized in that the infrared absorbing material quilt
It is set to the direction towards optical identifying apparatus.
11. optical indicia point according to any one of claim 1 to 10, which is characterized in that the infrared absorbing material
Shape is axial symmetry.
12. optical indicia point according to any one of claim 1 to 11, which is characterized in that on the optical indicia point
Infrared absorbing material and infrared reflective material in being spaced apart.
13. optical indicia point according to any one of claim 1 to 12, which is characterized in that on the optical indicia point
Infrared absorbing material number >=1.
14. optical indicia point according to claim 13, which is characterized in that the infrared absorption material on the optical indicia point
Number >=2 of material.
15. optical indicia point according to claim 14, which is characterized in that the infrared absorption material on the optical indicia point
Material is set as any one of situation:
It intersperses among on the optical indicia point；Or
Multiple infrared absorbing materials form a circle or triangle or quadrangle or straight line.
16. a kind of optics motion capture system, includes at least: optical indicia point, motion capture cameras, signal transmission apparatus and
Data processing stations, which is characterized in that the optical indicia point is the optics according to any one of claims 1 to 15
Identification point.
17. a kind of optics motion capture control method, for being based on infrared carry out optics motion capture, which is characterized in that including
Following steps:
The feedback light from least one optical indicia point is received, wherein the feedback light is by the optical indicia point
Infrared absorbing material weakens.
18. control method according to claim 17, which is characterized in that the optical indicia point is according to claim 1
To the point of optical indicia described in any one of 15.
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Cited By (1)
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| CN112280081A (en) * | 2020-10-26 | 2021-01-29 | 深圳市光科全息技术有限公司 | Infrared identification film |
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