CN108895982B - High-speed structures light generating device and three-dimensional single pixel imaging system - Google Patents
High-speed structures light generating device and three-dimensional single pixel imaging system Download PDFInfo
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- CN108895982B CN108895982B CN201810717199.8A CN201810717199A CN108895982B CN 108895982 B CN108895982 B CN 108895982B CN 201810717199 A CN201810717199 A CN 201810717199A CN 108895982 B CN108895982 B CN 108895982B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/21—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour by interference
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B15/00—Special procedures for taking photographs; Apparatus therefor
- G03B15/02—Illuminating scene
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/21—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour by interference
- G02F1/212—Mach-Zehnder type
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Optics & Photonics (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
Abstract
The embodiment of the invention provides a kind of high-speed structures light generating devices, comprising: mode-locked laser, dispersion compensating fiber, signal generator, Mach increase Dare modulator, single mode optical fiber, collimator and Dispersive Devices.The embodiment of the invention also provides a kind of three-dimensional single pixel imaging systems, comprising: above-mentioned high-speed structures light generating device, projection lens, high speed rotation platform, lens, object to be imaged and detector.The present invention can produce high-speed structures light and carry out the three-dimensional single pixel imaging of high speed.
Description
Technical field
The present embodiments relate to high speed three-dimensional imaging and single pixel technical field of imaging more particularly to a kind of high-speed structures
Light generating device and three-dimensional single pixel imaging system.
Background technique
High speed three-dimensional single pixel imaging system combines the high speed single pixel imaging technique and luminosity of " when-frequency-sky " mapping
Stereovision technique realizes the two-dimentional light intensity point that reality scene is reconstructed from different detection angles by single pixel imaging technique first
Then cloth reconstructs the three-dimensional letter of scene using photometric stereo vision technique from the image intensity distributional difference information of acquisition
Breath.
Traditional 3D imaging technique is broadly divided into three categories: flying based on stereoscopic vision, based on structure light and based on the time
3D imaging technique.Wherein the image taking speed of the 3D camera based on stereoscopic vision is primarily limited to frame per second (the ms amount of CCD and CMOS
Grade) and complicated 3D restructing algorithm (of depth information restored needs carry out image data to a large amount of image information
Match and train)；The image taking speed of camera based on structure light is primarily limited to the modulation rate (kHz) and CCD and CMOS of DMD
Frame per second；And the 3D camera based on time flight needs to carry out point by point scanning, therefore speed is also limited.It can be seen that how to obtain
A kind of high-speed structures light generating device is taken, and develops a kind of three-dimensional single pixel imaging system with high speed on this basis
System just becomes 3D imaging technique field technical problem urgently to be resolved.
Summary of the invention
In view of the above-mentioned problems existing in the prior art, the embodiment of the invention provides a kind of high-speed structures light generating device and
Three-dimensional single pixel imaging system.
On the one hand, the embodiment of the invention provides a kind of high-speed structures light generating devices, comprising: mode-locked laser, dispersion
Compensated optical fiber, signal generator, Mach increase Dare modulator, single mode optical fiber, collimator and Dispersive Devices；
The mode-locked laser is connect with the dispersion compensating fiber, is the dispersion compensating fiber for emitting laser
Spectrum is provided；The dispersion compensating fiber increases Dare modulator with the Mach and connect, for obtaining in the time domain extension spectrum
To spread spectrum；The signal generator increases Dare modulator with the Mach and connect, for generating encoded signal；The horse
Conspicuous increasing Dare modulator, connect with the single mode optical fiber, for the encoded signal to be modulated to the spread spectrum, obtains
Compound spread spectrum；The single mode optical fiber is connect with the collimator, is used for the compound spread spectrum described in time domain data compression, is obtained
To compound compressed spectrum；The collimator is connect with the single mode optical fiber, for adjusting described in the compound compressed spectrum injection
The incidence angle of Dispersive Devices；The Dispersive Devices receive the compound compressed spectrum after the collimator adjusts incidence angle, are used for
It realizes the mapping one by one of compound compressed spectrum in space, generates high-speed structures light.
On the other hand, the embodiment of the invention provides a kind of three-dimensional single pixel imaging systems, comprising: above-mentioned high-speed structures
Light generating device, projection lens, high speed rotation platform, lens, object to be imaged and detector；
The projection lens receives the high-speed structures that the high-speed structures light generating device described in claim 1 generates
Light, for the direction perpendicular to the high speed rotation platform surface, revolving the high-speed structures light described in horizontal sheaf at a high speed
Turn platform；Adhere to the object to be imaged on the high speed rotation platform, for realizing the longitudinal movement of the object to be imaged；
The lens are arranged in the diffusing reflection field of the high speed rotation platform, the intensity signal for converging diffusing reflection to space；Institute
Detector is stated, setting is in the lens exit end, for receiving the intensity signal of the lens transmitting and being converted into two-dimentional light intensity
Information；The three-dimensional single pixel of the object to be imaged is generated using photometric stereo vision algorithm according to the two-dimentional intensity signal
Image.
The embodiment of the invention provides a kind of high-speed structures light generating device and three-dimensional single pixel imaging systems, pass through Mach
Increase Dare modulator encoded signal is modulated on spread spectrum, reuses single mode optical fiber and obtain compound compressed spectrum, most pass through afterwards
Cross the available high-speed structures light of Dispersive Devices.And on the basis of the high-speed structures light of acquisition, designs and obtained one kind three
Single pixel imaging system is tieed up, the three-dimensional single pixel imaging of high speed can be carried out.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is the present invention
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is first embodiment of the invention high speed structure light generating device structural schematic diagram；
Fig. 2 is second embodiment of the invention high speed structure light generating device structural schematic diagram；
Fig. 3 is three-dimensional single pixel imaging system structural schematic diagram in third embodiment of the invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a kind of high-speed structures light generating device and three-dimensional single pixel imaging systems.Three-dimensional single
It mainly include two technical indicators in pixel blending technique, first is that the speed of image taking speed, in the industry it is generally accepted that image taking speed is got over
It is fast better, a large amount of image information can be effectively obtained in this way；Second is that the quality of imaging, i.e. the resolution ratio of image and clear
Degree etc.；The present invention mainly discusses first technical indicator, i.e. image taking speed.It is well known that in three-dimensional single pixel imaging system,
Introducing structure light is first had in imaging process, effective image information could be obtained by only having suitable structure light.Cause
This, what can be followed a well mapped-out plan draws a conclusion, and influencing one of key factor of image taking speed is exactly the speed speed that structure light is formed,
Faster structure light, which forms speed, necessarily leads to faster image taking speed, and vice versa.It can thus be appreciated that, it is desirable to accelerate three-dimensional single picture
The image taking speed of plain imaging system, then one of effective method is exactly to improve its structure light generation system, acquisition can
High speed generates the structure light generating device of structure light, and the device is applied in three-dimensional single pixel imaging system, so that it may have
Effect promotes the image taking speed of three-dimensional single pixel imaging system.Based on this thought, present invention firstly provides a kind of high-speed structures
Light generating device, to be applied in corresponding three-dimensional single pixel imaging system.It is first embodiment of the invention referring to Fig. 1, Fig. 1
High speed structure light generating device structural schematic diagram, comprising:
Mode-locked laser 101, dispersion compensating fiber 102, signal generator 107, Mach increase Dare modulator 103, single mode
Optical fiber 104, collimator 105 and Dispersive Devices 106；
Mode-locked laser 101 is connect with dispersion compensating fiber 102, for emitting laser (in another embodiment, mode locking
Laser 101 emits laser with the frequency of 50MHz), spectrum is provided for dispersion compensating fiber 102；
Dispersion compensating fiber 102 increases Dare modulator 103 with Mach and connect, for obtaining in the time domain extension spectrum
Spread spectrum；(frequency domain) Gao Chongfu frame per second pulse spectrum is mapped to time domain by dispersion compensating fiber 102, obtains the Gao Chong of time domain
Multi-frame rate pulse spectrum.
Signal generator 107 increases Dare modulator 103 with Mach and connect, for generating encoded signal；The encoded signal
It include: sinusoidal coding signal.
Mach increases Dare modulator 103, connect with single mode optical fiber 104, for the encoded signal to be modulated to described prolong
Exhibition spectrally, obtains compound spread spectrum；
Single mode optical fiber 104 is connect with collimator 105, is used for the compound spread spectrum described in time domain data compression, is obtained compound pressure
Contracting spectrum；
Collimator 105 is connect with single mode optical fiber 104, injects Dispersive Devices 106 for adjusting the compound compressed spectrum
Incidence angle；
Dispersive Devices 106 receive collimator 105 and adjust the compound compressed spectrum after incidence angle, for realizing compound pressure
The mapping one by one of contracting spectrum in space generates high-speed structures light；
Mode-locked laser 101 is also connect with signal generator 107, for providing synchronised clock letter to signal generator 107
Number.
Second embodiment of the invention is further described Dispersive Devices on the basis of first embodiment.Dispersion
The type of device is varied, specifically uses which kind of Dispersive Devices, also becomes technical staff's problem in need of consideration.The present invention the
Two embodiments for technical staff provide a kind of Dispersive Devices with specific reference to i.e. diffraction grating is formed another on this basis
Kind high-speed structures light generating device.Referring to fig. 2, Fig. 2 is that second embodiment of the invention high speed structure light generating device structure is shown
It is intended to, comprising:
Mode-locked laser 201, dispersion compensating fiber 202, signal generator 207, Mach increase Dare modulator 203, single mode
Optical fiber 204, collimator 205 and diffraction grating 206.
Dispersive Devices 206 receive collimator 205 and adjust the compound compressed spectrum after incidence angle, for realizing compound pressure
The mapping one by one of contracting spectrum in space generates high-speed structures light.The connection of other component and phase in function and first embodiment
Together, details are not described herein.
Third embodiment of the invention introduces a kind of three-dimensional single pixel imaging system on the basis of first embodiment.It can
With it is contemplated that in the composition of the three-dimensional single pixel imaging system use arrived above-mentioned high-speed structures light generating device, being capable of shape
At a kind of three-dimensional single pixel imaging system of high speed.Specifically, which uses first embodiment
High-speed structures light generating device (the high-speed structures light generating device in second embodiment in another embodiment, can also be used,
Its principle and method are similar with the present embodiment, and details are not described herein).It is three in third embodiment of the invention referring to Fig. 3, Fig. 3
Tie up single pixel imaging system structural schematic diagram, comprising:
High-speed structures light generating device 301 (identical as the high-speed structures light generating device in first embodiment), projection are saturating
Mirror 302, high speed rotation platform 303 (in another embodiment, can without the high speed rotation platform 303), lens 305, thoroughly
Mirror 307, object to be imaged 304, detector 306 and detector 308；
Projection lens 302 receives the high-speed structures light that high-speed structures light generating device 301 generates, and is used for the high speed
Structure light is with the direction perpendicular to 303 surface of high speed rotation platform, horizontal sheaf high speed rotation platform 303；
Adhere to object 304 to be imaged on high speed rotation platform 303, for realizing the longitudinal movement of object 304 to be imaged；
Object 304 to be imaged, passes through before projection lens 302, for providing the original object of imaging；
Lens 305 and lens 307, are arranged in the diffusing reflection field of high speed rotation platform 303, for converging diffusing reflection to sky
Between intensity signal (in another embodiment, the quantity of lens can be several, be evenly arranged in the high speed rotation platform
Diffusing reflection field in)；
Detector 306 and detector 308, are separately positioned on the exit end of lens 305 and lens 307, are used for receiving lens
305 and lens 307 transmit intensity signal and be converted into two-dimentional intensity signal；
According to the two-dimentional intensity signal, using photometric stereo vision algorithm, the three-dimensional for generating the object to be imaged is single
Pixel image specifically includes: by photometric stereo vision system, construct overdetermination matrix, solved using least-squares algorithm described in
Overdetermination matrix obtains the surface normal of the object to be imaged, generates the three-dimensional single pixel image of the object to be imaged.Institute
State the surface normal of object to be imaged, comprising: the optimal solution that the overdetermination matrix obtains is solved using least-squares algorithm.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (8)
1. a kind of three-dimensional single pixel imaging system, comprising: high-speed structures light generating device, the high-speed structures light generating device,
Include:
Mode-locked laser, dispersion compensating fiber, signal generator, Mach increase Dare modulator, single mode optical fiber, collimator and dispersion
Device；
The mode-locked laser is connect with the dispersion compensating fiber, for emitting laser, is provided for the dispersion compensating fiber
Spectrum；
The dispersion compensating fiber increases Dare modulator with the Mach and connect, for being prolonged in the time domain extension spectrum
Open up spectrum；
The signal generator increases Dare modulator with the Mach and connect, for generating encoded signal；
The Mach increases Dare modulator, connect with the single mode optical fiber, for the encoded signal to be modulated to the extension
Spectrally, compound spread spectrum is obtained；
The single mode optical fiber is connect with the collimator, is used for the compound spread spectrum described in time domain data compression, is obtained compound compressed
Spectrum；
The collimator is connect with the single mode optical fiber, injects the Dispersive Devices for adjusting the compound compressed spectrum
Incidence angle；
The Dispersive Devices receive the compound compressed spectrum after the collimator adjusts incidence angle, for realizing compound compressed
The mapping one by one of spectrum in space generates high-speed structures light；
Wherein, the system also includes:
Projection lens, lens, object to be imaged and detector；
The projection lens receives the high-speed structures light that the high-speed structures light generating device generates, and is used for the high speed
Structure light is with the direction perpendicular to the high speed rotation platform surface, high speed rotation platform described in horizontal sheaf；
The object to be imaged, passes through before the projection lens, for providing the original object of imaging；
The lens are arranged in the diffusing reflection field of the high speed rotation platform, and the light intensity for converging diffusing reflection to space is believed
Breath；The quantity of the lens is several, is evenly arranged in the diffusing reflection field of the high speed rotation platform；
The detector, setting is in the lens exit end, for receiving the intensity signal of the lens transmitting and being converted into two
Tie up intensity signal；
The three-dimensional single pixel of the object to be imaged is generated using photometric stereo vision algorithm according to the two-dimentional intensity signal
Image.
2. system according to claim 1, wherein it is described to use photometric stereo vision algorithm, generate the object to be imaged
The three-dimensional single pixel image of body, comprising: by photometric stereo vision system, construct overdetermination matrix, asked using least-squares algorithm
The overdetermination matrix is solved, the surface normal of the object to be imaged is obtained, generates the three-dimensional single pixel of the object to be imaged
Image.
3. system according to claim 2, wherein the surface normal for obtaining the object to be imaged, comprising: adopt
The optimal solution that the overdetermination matrix obtains is solved with least-squares algorithm.
4. system according to claim 1, wherein the mode-locked laser emits laser with the frequency of 50MHz.
5. system according to claim 1, wherein height is repeated frame per second pulse spectrum and is mapped to by the dispersion compensating fiber
Time domain obtains the high of time domain and repeats frame per second pulse spectrum.
6. system according to claim 1, wherein the encoded signal includes: sinusoidal coding signal.
7. system according to claim 1, wherein the mode-locked laser also connect with the signal generator, is used for
Synchronizing clock signals are provided to the signal generator.
8. system according to claim 1, wherein the Dispersive Devices include: diffraction grating.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810717199.8A CN108895982B (en) | 2018-07-03 | 2018-07-03 | High-speed structures light generating device and three-dimensional single pixel imaging system |
| PCT/CN2019/080840 WO2020007078A1 (en) | 2018-07-03 | 2019-04-01 | High speed structured light generation apparatus and three-dimensional single-pixel imaging system |
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| CN201810717199.8A CN108895982B (en) | 2018-07-03 | 2018-07-03 | High-speed structures light generating device and three-dimensional single pixel imaging system |
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| CN108895982A CN108895982A (en) | 2018-11-27 |
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| CN108895982B (en) * | 2018-07-03 | 2019-10-18 | 清华大学 | High-speed structures light generating device and three-dimensional single pixel imaging system |
| CN109905583B (en) * | 2019-03-27 | 2020-07-07 | 清华大学 | Multi-angle illumination superspeed imaging device |
| CN113048907B (en) * | 2021-02-08 | 2022-04-22 | 浙江大学 | Single-pixel multispectral imaging method and device based on macro-pixel segmentation |
| CN114441035A (en) * | 2021-12-31 | 2022-05-06 | 复旦大学 | Multispectral imaging method and device based on high-speed adjustable multicolor LED light source |
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| CN103676130B (en) * | 2013-12-18 | 2016-09-21 | 清华大学 | Micro imaging system |
| CN107024850B (en) * | 2017-05-26 | 2019-11-01 | 清华大学 | High-speed structures light 3-D imaging system |
| CN107272218B (en) * | 2017-05-26 | 2020-04-17 | 清华大学 | High speed structured light imaging system |
| CN107228625B (en) * | 2017-06-01 | 2023-04-18 | 深度创新科技（深圳）有限公司 | Three-dimensional reconstruction method, device and equipment |
| CN107677216B (en) * | 2017-09-06 | 2019-10-29 | 西安交通大学 | A kind of multiple abrasive grain three-dimensional appearance synchronous obtaining methods based on photometric stereo vision |
| CN108895982B (en) * | 2018-07-03 | 2019-10-18 | 清华大学 | High-speed structures light generating device and three-dimensional single pixel imaging system |
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