CN107783148A - Compressed sensing imaging device and method - Google Patents
Compressed sensing imaging device and method Download PDFInfo
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- CN107783148A CN107783148A CN201711222515.6A CN201711222515A CN107783148A CN 107783148 A CN107783148 A CN 107783148A CN 201711222515 A CN201711222515 A CN 201711222515A CN 107783148 A CN107783148 A CN 107783148A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/88—Lidar systems specially adapted for specific applications
- G01S17/89—Lidar systems specially adapted for specific applications for mapping or imaging
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/481—Constructional features, e.g. arrangements of optical elements
- G01S7/4814—Constructional features, e.g. arrangements of optical elements of transmitters alone
Abstract
The invention discloses a kind of compressed sensing imaging device and method,The imaging device includes emission system,Multi-channel detection system and central processing system,By the nonmonochromatic source in emission system send multi-wavelength light beam be projected to detection target on reflected,The reflected light of different wave length is detected respectively by multi-channel detection system,And parallel processing is carried out to the result of detection of different wavelengths of light by central processing system,The result of detection for different wave length, which is associated, respectively is calculated corresponding reconstructed image,Handled finally by reconstructed image of the signal processing unit for different wave length using multichannel image integration technology,Obtain final imaging results,Detection target is detected using nonmonochromatic source,The complementary frequency spectrums information brought with spectrum information similar in acquisition and different wave length,Obtain more comprehensively reconstructing the spectrum information of target,So as to reduce image impairment caused by air pollutants or water body,Improve Image Reconstruction precision.
Description
Technical field
The present invention relates to target detection identification and imaging field, and in particular to a kind of compressed sensing imaging device and method.
Background technology
Relevance imaging (correlated imaging), also referred to as ghost imaging (ghost imaging), it is that one kind is based on light field
The quantum or classical correlation characteristic of fluctuation, can be with by reference to the intensity correlation computing between light field and target acquisition light field
Obtain to non-localized the new imaging technique of target image information.But sampling number to be present more for traditional relevance imaging, into
As the time is grown, the problem of system architecture complexity, be not particularly suited in this environment complicated and changeable of bad weather or water body into
Picture.Compressed sensing (Compressive Sensing) technology is a kind of brand-new signal sampling technology occurred in recent years, different
In traditional nyquist sampling theorem, the technology synchronously completes the compression process of signal with sampling process, i.e., by higher-dimension
Primary signal projects to low-dimensional spatially by observing matrix, passes through solving-optimizing problem high probability with a small amount of projective parameter
Reconstruct primary signal.The technology can effectively improve signal sampling efficiency, reduce signal processing time and calculate cost.
Relevance imaging technology based on compressed sensing can effectively overcome traditional association imaging technique on detection time,
The problem of system complexity.Because the technology is still imitated using single pixel detector as core devices, its opto-electronic conversion is received
Rate is high, high gain, fast response time, the detection being very suitable under low light environment.Because what photodetector received is no longer
Signal with spatial resolution, but the total light intensity value in field range, it is not easy to by turbulent flow in water, fluctuation, impurity
Interference.Further, since reference edge uses the device with modulation function to replace, system complexity and volume are significantly reduced
Degree so that the adaptive capacity to environment and stability of system are greatly improved.
Although compressed sensing imaging has excellent Testing of Feeble Signals and environment resistant interference performance, therefore is more suitable for strong dissipate
The image forming medium penetrated and absorbed by force.Yet with the principle in order to obtain range information, make usually using monochromatic short-pulse laser
For light source so that in different weather conditions or water body, in the case of no progress wavelength is preferable, the measurement of Single wavelength
Mode can be influenceed by environment so as to reduce image-forming range and image quality, and there is this mode relatively low environment to adapt to energy
Power, it is unfavorable for accurately recovering target image under complex environment.
The content of the invention
The invention provides a kind of compressed sensing imaging device and method, to solve to use unicast present in prior art
The problem of long imaging mode applicability is poor, and the target image accuracy recovered is low.
In order to solve the above-mentioned technical problem, the technical scheme is that：A kind of compressed sensing imaging device, including transmitting
System, multi-channel detection system and central processing system：
The transmitter unit includes nonmonochromatic source, spatial light modulator and the projecting unit set gradually along light path, institute
The light beam that nonmonochromatic source is sent is stated to be projected to through the projecting unit in detection target after spatial light modulator modulation；
The central processing system includes signal processing unit and the control unit being connected with each other, the signal processing unit
For parallel processing computer, the multi-channel detection system is connected with the signal processing unit, the spatial light modulator with
Described control unit connects.
Further, the nonmonochromatic source is broad spectrum light source, and the broad spectrum light source is based on the white of LARP technologies
Light source or glow discharge spot lamp or LED light source or lamp.
Further, the multi-channel detection system includes channel selection unit and the photodetection set gradually along light path
Device, the photodetector is single pixel detector, and is connected with the signal processing unit.
Further, the nonmonochromatic source is the array of source being made up of the different monochromatic source of some wavelength.
Further, the multi-channel detection system includes channel selection unit and the photodetection set gradually along light path
Device, the photodetector is single pixel detector, and is connected with the signal processing unit.
Further, the channel selection unit is rotating filtering piece, and timesharing passes through the reflected light of the different wave length.
Further, the multi-channel detection system includes being used to collect the receipts light list of the reflected beams of the detection target
Member, the beam splitting unit connected with the receipts light unit and some photodetectors corresponding with the beam splitting unit, Mei Geguang
Electric explorer detects a kind of light of wavelength in the nonmonochromatic source.
Further, the multi-channel detection system also includes multiple transflection mirrors set gradually along light path, each described
Transflection mirror is corresponding with photodetector one of them described.
The present invention also provides a kind of imaging method of compressed sensing imaging device as described above, comprises the following steps：
S1：The nonmonochromatic source sends the light beam of multi-wavelength, single by projecting after spatial light modulator modulation
Member is projected in the detection target；
S2：Light beam through the detection target reflection is received by the multi-channel detection system, the multi-channel detection system
System detects to the reflected light of different wave length respectively, and gives the information transmission detected to the signal processing unit, simultaneously
Control unit sends the modulation matrix of spatial light modulator to the signal processing unit；
S3：The signal processing unit carries out parallel processing to the result of detection of different wavelengths of light, respectively for different ripples
Long result of detection is associated with the modulation matrix of spatial light modulator and corresponding reconstructed image is calculated；
S4：The signal processing unit is used at multichannel image integration technology for the reconstructed image of different wave length
Reason, obtains final imaging results.
Further, the step S4 comprises the following steps：
S41:Reconstructed image corresponding to different wave length is subjected to rgb value decomposition, and is normalized for each R/G/B values
Processing, obtains 3 groups of RGB images；
S42:3 groups of RGB images are subjected to Fourier transform, obtain the spectral matrix of 3 groups of RGB images, and according to not
Co-wavelength carries out equilibrium treatment to frequency spectrum；
S43:The spectral matrix of every group of RGB image is subjected to statistical average calculating, obtains spectrum mean matrix and frequency spectrum side
Poor matrix, using the Spectral variance matrix as spectrum mean matrix described in parameters revision, by every group of revised frequency of RGB image
Mean Matrix superposition is composed, and carries out inverse Fourier transform and obtains final imaging results.
Compressed sensing imaging device provided by the invention and method, the imaging device include emission system, multi-channel detection
System and central processing system, detection mesh is projected to by setting nonmonochromatic source to send the light beam of multi-wavelength in emission system
Put on and reflected, the reflected light of different wave length is detected respectively by multi-channel detection system, and pass through central processing
System carries out parallel processing to the result of detection of different wavelengths of light, and the result of detection for different wave length is associated calculating respectively
Corresponding reconstructed image is obtained, is melted finally by reconstructed image of the signal processing unit for different wave length using multichannel image
Conjunction technology is handled, and obtains final imaging results, the present invention is detected using nonmonochromatic source to detection target, to obtain
The complementary frequency spectrums information brought of similar spectrum information and different wave length, using these complementary frequency spectrums information to obtain more
The spectrum information of comprehensive reconstruct target, so as to reduce image impairment caused by air pollutants or water body, is obtained more true to nature
Picture quality, improve Image Reconstruction precision.
Brief description of the drawings
Fig. 1 is the frame construction drawing of compressed sensing imaging device in the embodiment of the present invention 1；
Fig. 2 is the concrete structure schematic diagram of compressed sensing imaging device one in the embodiment of the present invention 1；
Fig. 3 is the concrete structure schematic diagram of compressed sensing imaging device one in the embodiment of the present invention 2；
Fig. 4 is the concrete structure schematic diagram of compressed sensing imaging device one in the embodiment of the present invention 3；
Fig. 5 is the concrete structure schematic diagram of compressed sensing imaging device one in the embodiment of the present invention 4.
Shown in figure：10th, emission system；110th, nonmonochromatic source；110a, red light source；111a, green light source；111c、
Blue-light source；120th, spatial light modulator；130th, projecting unit；140th, shaping and collimating element；
20th, multi-channel detection system；210th, channel selection unit；220th, photodetector；220a, feux rouges detector；
220b, green glow detector；220c, blue light detector；230th, light unit is received；
30th, central processing system；310th, signal processing unit；320th, control unit；
40th, target is detected；50a, the first transflection mirror；50b, the second transflection mirror；50c, the 3rd transflection mirror；50d, the 4th transflection
Mirror.
Embodiment
The present invention is described in detail below in conjunction with the accompanying drawings.
As shown in figure 1, the invention provides a kind of compressed sensing imaging device, including emission system 10, multi-channel detection
System 20 and central processing system 30.
The transmitter unit 10 includes the nonmonochromatic source 110, spatial light modulator 120 and projection set gradually along light path
Unit 130, the light beam that the nonmonochromatic source 110 is sent is after the spatial light modulator 120 modulation through the projecting unit
130 are projected in detection target 40；Specifically, nonmonochromatic source 110 is the light source that can export at least two wavelength, this implementation
In example, nonmonochromatic source 110 be broad spectrum light source, you can to export the light source of continuous wavelength, the broad spectrum light source for based on
The white light source or glow discharge spot lamp or LED light source or lamp of LARP (laser remote excitation fluorescent material) technology, in addition,
Rear of the nonmonochromatic source 110 along light path sets shaping and collimating element 140, and the light beam sent to nonmonochromatic source 110 is carried out
Shaping and collimation.The spatial light modulator 120 is digital micromirror array (DMD), is made up of some micro mirrors, according to the tune of setting
The state of each micro mirror of matrix majorization processed, so as to realize the modulation to light beam；The projecting unit 130 can use projection lens
Head, or other any camera lenses, for the picture of spatial light modulator 120 to be projected into detection target 40.
The central processing system 30 includes signal processing unit 310 and the control unit 320 being connected with each other, the signal
Processing unit 310 is parallel processing computer, and the signal processing unit 310 is connected with the multi-channel detection system 20, connect
The detection data of the multi-channel detection system 20 is received, the detection data of different wave length is carried out simultaneously by parallel processing computer
Row processing, specially for the result of detection of different wave length closed with the modulation matrix of spatial light modulator 120 respectively
Corresponding reconstructed image is calculated in connection, and association herein is calculated specifically, for same detection target 40, and repeatedly regulation is empty
Between speculum in optical modulator 120 state, obtain different modulation matrixs, light beam is after different modulation matrix modulation
It is irradiated in detection target 40 and is reflected, the light beam of reflection obtains different measured values by the detection of photodetector 220, different
Modulation matrix form a big matrix, different measured values form an one-dimensional vector, and both are associated calculating so as to obtain
One frame reconstructed image.Finally the reconstructed image of acquisition is handled using multichannel image integration technology, obtain it is final into
As result.Described control unit 320 is connected with the spatial light modulator 120, and spatial light is controlled according to the modulation matrix of setting
The state of micro mirror in modulator 130, realizes and light beam is modulated.
Preferably, the multi-channel detection system 20 includes channel selection unit 210 and the photoelectricity set gradually along light path
Detector 220, the photodetector 220 is single pixel detector, and is connected with the signal processing unit 310.Specifically,
The photodetector 220 is single pixel detector.As shown in Fig. 2 the channel selection unit 210 is rotating filtering piece, point
When through the different wave length reflected light, it is necessary to explanation, the rotating filtering piece include with multiple filter areas optical filtering
Piece and the drive mechanism (being to show in figure) for driving optical filter rotation, and each filter area corresponds to the light of different wavelength,
Optical filter is driven to rotate by drive mechanism, timesharing passes through the light of different wave length, makes photodetector 210 to the anti-of different wave length
Light is penetrated to be detected respectively.It should be noted that when the image spectrum information of same submarine target is visited by the light source of different wave length
During survey, similar spectrum information can not only be obtained, and complementary frequency spectrums information caused by different wave length can be obtained.Utilize these
Complementary frequency spectrums information can reduce image caused by air pollutants or water body more comprehensively to reconstruct the spectrum information of target
Loss, so as to obtain picture quality more true to nature.
A kind of imaging method of above-mentioned compressed sensing imaging device is also provided in the present embodiment, comprised the following steps：
S1：The nonmonochromatic source 110 sends the light beam including multi-wavelength, is modulated through the spatial light modulator 120
It is projected to afterwards by projecting unit 130 in the detection target 40；In the present embodiment, the use of nonmonochromatic source 110 can export
The broad spectrum light source of continuous wavelength, such as it is based on the white light source or glow discharge spot lamp of LARP (laser remote excitation fluorescent material) technology
Or LED light source or lamp, shaping and collimating element 140 are set at rear of the nonmonochromatic source 110 along light path, to polyenergetic
The light beam that light source 110 is sent carries out shaping and collimation.The spatial light modulator 120 is the digital micro-mirror being made up of some micro mirrors
Array (DMD), the state of each micro mirror is controlled according to the modulation matrix of setting by control unit 320, so as to realize to light beam
Modulation；The projecting unit 130 is used to the picture of spatial light modulator 120 being projected to detection target 40.
S2：The light beam reflected through the detection target 40 is received by the multi-channel detection system 20, and the multichannel is visited
Examining system 20 detects to the light beam of different wave length respectively, and gives the information transmission detected to the signal processing unit
310, while control unit 320 sends the modulation matrix of spatial light modulator 120 to the signal processing unit 310；Specifically
, in the present embodiment, multi-channel detection system 20 includes channel selection unit 210 and the photodetector set gradually along light path
220, wherein photodetector 220 is single pixel detector.The channel selection unit 210 is rotating filtering piece, and timesharing passes through
The reflected light of the different wave length is, it is necessary to which explanation, the rotating filtering piece include optical filter and band with multiple filter areas
The drive mechanism (being to show in figure) of optical filter rotation is moved, and each filter area corresponds to the light of different wavelength, passes through drive
Motivation structure drives optical filter rotation, and timesharing passes through the light of different wave length, makes reflected light point of the photodetector 210 to different wave length
Do not detected.
S3：The signal processing unit 310 carries out parallel processing to the result of detection of different wave length, respectively for different ripples
Long result of detection, which is associated, is calculated corresponding reconstructed image；Specifically, the signal processing unit 310 is parallel place
Computer is managed, the signal processing unit 310 is connected with the multi-channel detection system 20, receives the multi-channel detection system
20 detection data, parallel processing is carried out to the detection data of different wave length by parallel processing computer, specially pin respectively
The result of detection of different wave length is associated with the modulation matrix of spatial light modulator 120 corresponding reconstruct image is calculated
Picture.Association herein is calculated specifically, for same detection target 40, repeatedly adjusts the reflection in spatial light modulator 120
The state of mirror, different modulation matrixs is obtained, it is enterprising that light beam is irradiated to detection target 40 after different modulation matrix modulation
Row reflection, the light beam of reflection obtain different measured values by the detection of photodetector 220, and different modulation matrixs forms one big
Matrix, different measured values form an one-dimensional vector, and both are associated calculating so as to obtain a frame reconstructed image.
S4：The signal processing unit 310 is entered for the reconstructed image of different wave length using multichannel image integration technology
Row processing, obtains final imaging results.Comprise the following steps：
S41:Reconstructed image corresponding to different wave length is carried out into rgb value to decompose to obtain three images, and is directed to each image
Value is normalized, and obtains 3 groups of RGB images；Specifically, by taking three wavelength as an example, corresponding reconstructed image is H, I, K,
It is { H then to carry out rgb value to it respectively to decompose to obtain three imagesR、H G、H B}；{IR、I G、I B}；{KR、KG、KB}；For
Its three groups of RGB image for being normalized to obtain is { (HR)′、(IR)′、(KR)′}；{(HG)′、(IG)′、(KG)′}；
{(HB)′、(IB)′、(KB) ' }, wherein () ' it is normalization computing；Certainly in practical application, the quantity of different wave length should be greater than
3, preferably greater than 10, so as to improve the quantity of fused images, detect the Image Reconstruction precision of target 40.
S42:3 groups of RGB images are subjected to Fourier transform, obtain the spectral matrix of 3 groups of RGB images, and for not
Co-wavelength carries out spectral equalization processing；Specifically, according to Fourier transform formula
In order to reduce frequency spectrum amount of calculation, for the spectral matrix of each wavelength, frequency w therein takes frequency corresponding to 0~1/2 wavelength,
The spectral matrix for finally obtaining 3 groups of RGB images is { F [(HR)′]、F[(IR)′]、F[(KR)′]}；{F[(HG)′]、F[(IG)′]、F
[(KG)′]}；{F[(HB)′]、F[(IB)′]、F[(KB)′]}；Wherein F [] represents Fourier transformation.
S43:The spectral matrix of every group of RGB image is subjected to statistical average calculating, obtains spectrum mean matrix and frequency spectrum side
Poor matrix, using the Spectral variance matrix as spectrum mean matrix described in parameters revision, by every group of revised frequency of RGB image
Mean Matrix superposition is composed, and carries out inverse Fourier transform and obtains final imaging results.Specifically, scheme respectively for every group of RGB
The spectral matrix of picture carries out asking arithmetic mean and variance computing, obtains spectrum mean matrix and corresponding Spectral variance matrix, will
Each spectrum mean matrix ± 0.1* Spectral variance matrixes, so as to obtain revised spectrum mean matrix；Finally by every group of RGB
Spectrum mean matrix superposition after image correction, and carry out inverse fourier transform and obtain final imaging results.Here can also
First every group of RGB image revised spectrum mean matrix be overlapped again after inverse fourier transform, obtained final
Imaging results.
Embodiment 2
As different from Example 1, in the present embodiment, the multi-channel detection system 20 includes being used to collect the detection
The receipts light unit 230 of the reflected beams of target, with the beam splitting unit that is connected of receipts light unit and with the beam splitting unit pair
Some photodetectors 220 answered, each photodetector 220 detects a kind of light of wavelength in the nonmonochromatic source, described
The reflected beams are divided into the light of different wave length by beam splitting unit, are detected by the photodetector 220 of corresponding wavelength.Tool
Body, the light beam received light unit 230 and be used to collect the multi-wavelength that detection target 40 reflects, and beam splitting unit is passed to, receive
Light unit 230 can set one or more and be corresponded with photodetector 220, in the present embodiment, set a receipts light
Unit 230, before the receipts light unit 230 is located at beam splitting unit along light path, as shown in figure 3, by taking 3 photodetectors 220 as an example,
Respectively feux rouges detector 220a, green glow detector 220b and blue light detector 220c, the beam splitting unit include along light path according to
Two transflection mirrors of secondary setting, respectively the first transflection mirror 50a and the second transflection mirror 50b, the first transflection mirror 50a is selected as reflection
Blue light, the transflection mirror of feux rouges and green glow is transmitted, select the second transflection mirror 50b to reflect green glow, transmit the transflection mirror of feux rouges, this reality
Apply in example, the first transflection mirror 50a and the second transflection mirror 50b are obliquely installed with horizontal direction in 45 °, so that transmission is better achieved
With the purpose of reflection, blue light detector 220c is located on the reflected light path of the first transflection mirror 50a blue lights, by green glow detector
220b is on the reflected light path of the second transflection mirror 50b green glows, by feux rouges detector 220a located at the second transflection mirror 50b feux rouges
On transmitted light path, the detection to blue and green light and feux rouges is realized respectively.The first transflection mirror 50a can certainly be selected as reflection
Feux rouges, the transflection mirror of green glow and blue light is transmitted, select the second transflection mirror 50b to reflect green glow, transmit the transflection mirror of blue light, similarly
First transflection mirror 50a and the second transflection mirror 50b are obliquely installed with horizontal direction in 45 °, by feux rouges detector 220a located at the
On the reflected light path of one transflection mirror 50a feux rouges, green glow detector 220b is located to the reflected light path of the second transflection mirror 50b green glows
On, by blue light detector 220c on the transmitted light path of the second transflection mirror 50b blue lights, realize respectively to feux rouges, green glow and indigo plant
The detection of light.According to optically coated principle, transmission spectrum extends or from shortwave to long wave the above method from long wavelength to short wavelength
Extension.Three receipts light units 230 can certainly be set, correspond with single pixel detector 220, detected in each single pixel
Light unit 230 is received in the front of device 220 (namely between single pixel detector 220 and corresponding transflection mirror) corresponding to setting, certainly
Relative to the scheme using a receipts light unit 230, hardware cost is higher, and the size of transflection mirror is also larger.Using the present embodiment
Scheme realize the signal that different wave length is obtained in synchronization, reconstructed image precision is high, is not easily susceptible to external environment condition and is
The negative effect that system spatial deviation is brought.
Embodiment 3
As different from Example 1, in the present embodiment, the nonmonochromatic source 110 is included by the different list of some wavelength
The array of source of color light source composition.In the present embodiment, by taking three kinds of monochromatic sources as an example, respectively red light source 111a, green light
Source 111b and blue-light source 111c, three kinds of light sources can be with Heterogeneous Permutation, and the light sent is separate, can also be by setting light
Element fusion is a light beam, as shown in figure 4, by setting the 3rd transflection mirror 50c and the 4th transflection mirror 50d, makes three light
The light beam that source is sent permeates light beam, selects the 3rd transflection mirror 50c to reflect the transflection mirror of green glow for transmission feux rouges, select
4th transflection mirror 50d is transmission feux rouges and green glow, reflects the transflection mirror of blue light, red light source 111a, the 3rd transflection mirror 50c and the
Four transflection mirror 50d are arranged in order along light path, and green light source 111b is corresponding with the 3rd transflection mirror 50c, blue-light source 111c with
The 4th transflection mirror 50d is corresponding.The feux rouges that red light source 111a is sent is saturating through blue-light source 111c and the described 4th successively
It is projected to after anti-mirror 50d on shaping and collimating element 140, the green glow that green light source 111b is sent is reflected by the 3rd transflection mirror 50c
The 4th transflection mirror 50d is passed through afterwards and is projected on shaping and collimating element 140, and the blue light that blue-light source 111c is sent is saturating by the 3rd
It is projected to after anti-mirror 50c reflections on shaping and collimating element 140, three kinds of colors light simultaneously, and synthesize a kind of light beam.Certainly
The 3rd transflection mirror 50c can be selected to transmit blue light, reflect the transflection mirror of green glow, select the 4th transflection mirror 50d to transmit blue light
And green glow, reflect the transflection mirror of feux rouges, by blue-light source 111c, the 3rd transflection mirror 50c and the 4th transflection mirror 50d along light path successively
Arrangement, green light source 111b is corresponding with the 3rd transflection mirror 50c, and red light source 111d is corresponding with the 4th transflection mirror 50d.
The blue light that blue-light source 111c is sent is projected to shaping and standard after passing through blue-light source 111c and the 4th transflection mirror 50d successively
On straight device 140, the green glow that green light source 111b is sent is passed through the 4th transflection mirror 50d after the 3rd transflection mirror 50c reflections and thrown
It is incident upon on shaping and collimating element 140, the feux rouges that red light source 111a is sent is projected to shaping after being reflected by the 3rd transflection mirror 50c
And on collimating element 140, three kinds of colors light simultaneously, and synthesize a kind of light beam.Above-mentioned arrangement principle is based in optical coating,
The principle that transmission spectrum extends or extended from shortwave to long wave from long wavelength to short wavelength.Other arrangement sides can certainly be used
Formula, as long as meeting optically coated principle.
The multi-channel detection system 20 includes channel selection unit 210 and the photodetector set gradually along light path
220, the photodetector 220 is single pixel detector, and is connected with the signal processing unit 310.Specifically, the light
Electric explorer 220 is single pixel detector.The channel selection unit 210 is rotating filtering piece, and timesharing passes through the different ripples
Long reflected light is, it is necessary to which explanation, the rotating filtering piece include the optical filter with multiple filter areas and drive the optical filter
The drive mechanism (being to show in figure) of rotation, and each filter area corresponds to the light of different wavelength, is driven by drive mechanism
Optical filter rotates, and timesharing passes through the light of different wave length, photodetector 210 is visited the reflected light of different wave length respectively
Survey, the program uses the method for receiving detectable signal at times, reduces the hardware complexity of signal processing unit 310.Certainly
One synchronous control unit can also be set in central processing system 30, control red light source 111a, green light source 111b and
Blue-light source 111c timesharing lights, while controls drive mechanism to drive the rotation of rotating filtering piece to make the filter area on rotating filtering piece
It is synchronous with current illuminating source.
Embodiment 4
As shown in figure 5, as different from Example 3, in the present embodiment, the multi-channel detection system 20 includes being used to receive
Collect the reflected beams of the detection target receipts light unit 230, with it is described receive the beam splitting unit that is connected of light unit and with it is described
Some photodetectors 220 corresponding to beam splitting unit, each photodetector 220 detect a kind of wavelength in the nonmonochromatic source
Light, the reflected beams are divided into the light of different wave length, are entered by the photodetector 220 of corresponding wavelength by the beam splitting unit
Row detection.Specifically, the light beam received light unit 230 and be used to collect the multi-wavelength that detection target 40 reflects, and pass to point
Shu Danyuan, one or more can be set and be corresponded with photodetector 220 by receiving light unit 230, in the present embodiment, be set
One receipts light unit 230, before the receipts light unit 230 is located at beam splitting unit along light path, by taking 3 photodetectors 220 as an example, point
Not Wei feux rouges detector 220a, green glow detector 220b and blue light detector 220c, three photodetectors 220 can be according to anti-
Light is penetrated to shift to install, respectively receive reflected light and detect corresponding to light, can also use other circuit elements with simplify arrangement
Method, as shown in figure 5, the beam splitting unit includes the two transflection mirrors set gradually along light path, respectively the first transflection mirror 50a
With the second transflection mirror 50b, the first transflection mirror 50a is selected to reflect blue light, transmits the transflection mirror of feux rouges and green glow, and selection second is saturating
Anti- mirror 50b is reflection green glow, transmits the transflection mirror of feux rouges, and in the present embodiment, the first transflection mirror 50a and the second transflection mirror 50b are equal
It is obliquely installed with horizontal direction in 45 °, so that the purpose of transmission and reflection is better achieved.Blue light detector 220c is located at first
On the reflected light path of transflection mirror 50a blue lights, by green glow detector 220b on the reflected light path of the second transflection mirror 50b green glows,
By feux rouges detector 220a on the reflected light path of the second transflection mirror 50b feux rouges, realize respectively to blue and green light and feux rouges
Detection.The first transflection mirror 50a can certainly be selected to reflect feux rouges, transmit the transflection mirror of green glow and blue light, selection second is saturating
Anti- mirror 50b is reflection green glow, transmits the transflection mirror of blue light, similarly the first transflection mirror 50a and the second transflection mirror 50b with level side
It is obliquely installed in 45 °, by feux rouges detector 220a on the reflected light path of the first transflection mirror 50a feux rouges, green glow is detected
Blue light detector 220c is located at the second transflection mirror 50b blue lights by device 220b on the reflected light path of the second transflection mirror 50b green glows
Transmitted light path on, realize the detection to feux rouges, green glow and blue light respectively.The above method is according to optically coated principle, transmission
Spectrum extension or extension from shortwave to long wave from long wavelength to short wavelength.Three receipts light units 230 can certainly be set, with single picture
Plain detector 220 corresponds, each single pixel detector 220 along light path front (namely single pixel detector 220 with
Between corresponding transflection mirror) corresponding receipts light unit 230 is set, certainly relative to a scheme for receiving light unit 230 is used, firmly
Part cost is higher, and the size of transflection mirror is also larger.In addition it is also possible to a Synchronization Control list is set in central processing system 30
Member, control red light source 111a, green light source 111b and blue-light source 111c timesharing light, while control feux rouges detector
220a, green glow detector 220b and blue light detector 220c timesharing are opened, and with corresponding light source synchronous.Using in the present embodiment
Scheme the specific strong adaptability of compressed sensing imaging device and accurate reconfiguration information the advantages of.
In summary, compressed sensing imaging device provided by the invention and method, the imaging device include emission system 10,
Multi-channel detection system 20 and central processing system 30, by setting nonmonochromatic source 210 to send more ripples in emission system 10
Long light beam, which is projected in detection target 40, to be reflected, by multi-channel detection system 20 respectively to the reflected light of different wave length
Detected, and parallel processing is carried out to the result of detection of different wavelengths of light by central processing system 30, respectively for difference
The result of detection of wavelength, which is associated, is calculated corresponding reconstructed image, finally by signal processing unit 310 for difference
The reconstructed image of wavelength is handled using multichannel image integration technology, obtains final imaging results, the present invention is using non-
Monochromatic source 210 detects to detection target, the complementary frequency spectrums brought with spectrum information similar in acquisition and different wave length
Information, using these complementary frequency spectrums information to obtain more comprehensively reconstructing the spectrum information of target, so as to reduce air pollution
Image impairment caused by thing or water body, picture quality more true to nature is obtained, improves Image Reconstruction precision.
Although embodiments of the present invention are illustrated in specification, these embodiments are intended only as prompting,
It should not limit protection scope of the present invention.It is equal that various omission, substitution, and alteration are carried out without departing from the spirit and scope of the present invention
It should include within the scope of the present invention.
Claims (10)
1. a kind of compressed sensing imaging device, it is characterised in that including emission system, multi-channel detection system and central processing system
System：
The transmitter unit includes nonmonochromatic source, spatial light modulator and the projecting unit set gradually along light path, described non-
The light beam that monochromatic source is sent is projected in detection target after spatial light modulator modulation through the projecting unit；
The central processing system includes signal processing unit and the control unit being connected with each other, and the signal processing unit is simultaneously
Row processing computer, the multi-channel detection system is connected with the signal processing unit, the spatial light modulator with it is described
Control unit connects.
2. compressed sensing imaging device according to claim 1, it is characterised in that the nonmonochromatic source is wide spectrum light
Source, the broad spectrum light source are white light source or glow discharge spot lamp or LED light source or lamp based on LARP technologies.
3. compressed sensing imaging device according to claim 2, it is characterised in that the multi-channel detection system includes edge
The channel selection unit and photodetector that light path is set gradually, the photodetector are single pixel detector, and with it is described
Signal processing unit connects.
4. compressed sensing imaging device according to claim 1, it is characterised in that the nonmonochromatic source is by some ripples
The array of source of long different monochromatic source composition.
5. compressed sensing imaging device according to claim 4, it is characterised in that the multi-channel detection system includes edge
The channel selection unit and photodetector that light path is set gradually, the photodetector are single pixel detector, and with it is described
Signal processing unit connects.
6. the compressed sensing imaging device according to claim 3 or 5, it is characterised in that the channel selection unit is rotation
Turn optical filter, timesharing passes through the reflected light of the different wave length.
7. the compressed sensing imaging device according to claim 2 or 4, it is characterised in that the multi-channel detection system bag
Include the reflected beams for collecting the detection target receipts light unit, with it is described receive the beam splitting unit that is connected of light unit and with
Some photodetectors corresponding to the beam splitting unit, each photodetector detect a kind of wavelength in the nonmonochromatic source
Light.
8. compressed sensing imaging device according to claim 7, it is characterised in that the multi-channel detection system also includes
Multiple transflection mirrors set gradually along light path, each transflection mirror are corresponding with photodetector one of them described.
9. a kind of imaging method of compressed sensing imaging device as claimed in claim 1, it is characterised in that including following step
Suddenly：
S1：The nonmonochromatic source sends the light beam of multi-wavelength, is thrown after spatial light modulator modulation by projecting unit
It is incident upon in the detection target；
S2：Light beam through the detection target reflection is received by the multi-channel detection system, the multi-channel detection system point
The other reflected light to different wave length detects, and gives the information transmission detected to the signal processing unit, controls simultaneously
Unit sends the modulation matrix of spatial light modulator to the signal processing unit；
S3：The signal processing unit carries out parallel processing to the result of detection of different wavelengths of light, respectively for different wave length
Result of detection is associated with the modulation matrix of spatial light modulator and corresponding reconstructed image is calculated；
S4：The signal processing unit is handled for the reconstructed image of different wave length using multichannel image integration technology,
Obtain final imaging results.
10. imaging method according to claim 9, it is characterised in that the step S4 comprises the following steps：
S41:Reconstructed image corresponding to different wave length is subjected to rgb value decomposition, and place is normalized for each R/G/B values
Reason, obtains 3 groups of RGB images；
S42:3 groups of RGB images are subjected to Fourier transform, obtain the spectral matrix of 3 groups of RGB images, and be directed to different ripples
The processing of progress line frequency spectral balancing；
S43:The spectral matrix of every group of RGB image is subjected to statistical average calculating, obtains spectrum mean matrix and Spectral variance square
Battle array, it is using the Spectral variance matrix as spectrum mean matrix described in parameters revision, every group of revised frequency spectrum of RGB image is equal
Value matrix is superimposed, and is carried out inverse Fourier transform and obtained final imaging results.
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