CN106123915B - A kind of pneumatic degraded image recovery system based on direct point spread function - Google Patents
A kind of pneumatic degraded image recovery system based on direct point spread function Download PDFInfo
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- CN106123915B CN106123915B CN201610407848.5A CN201610407848A CN106123915B CN 106123915 B CN106123915 B CN 106123915B CN 201610407848 A CN201610407848 A CN 201610407848A CN 106123915 B CN106123915 B CN 106123915B
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- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C25/00—Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass
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- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
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Abstract
The present invention provides a kind of pneumatic degraded image recovery system based on direct point spread function, including harvester, for obtaining the target area image disturbed by pneumatic shock 1ayer；Measuring device obtains focusing on the far field focus hot spot outside pneumatic shock 1ayer for emitting laser beam；Receive the distorted wavefront that the scattering light wave of far field focus hot spot generates after pneumatic shock 1ayer；Distorted wavefront is directly imaged using the Fourier transform property of lens imaging, imaging facula obtains the corresponding point spread function of distorted wavefront after opto-electronic conversion；Restoring means, for carrying out de-convolution operation to target area image and point spread function, obtain the restored image of target area, above system directly acquires the point spread function of distorted wavefront by lens and realizes the efficient recovery correction of degraded image by the method for image deconvolution, whole system complexity is relatively low, and minimize, cost is relatively low and practicability is stronger.
Description
Technical field
The present invention relates to technical field of image processing, measured based on direct point spread function in particular to a kind of
Pneumatic degraded image restores correction system.
Background technology
With optical imagery detection, guidance system aircraft when endoatmosphere is with hypersonic flight, aircraft
Phenomena such as violent interaction occurring between optical window and air and generating gas ionization, cause gas temperature, density,
Pressure and structure of chemical composition change, the complicated variation of light beam propagation medium around above-mentioned gas so that aircraft
The target imaging of airborne optical imaging system generates violent distortion, causes target collimating fault, image jitter, obscures, this
Effect is aero-optical effect.
Above-mentioned effect make image transmitting light beam generate wave aberration, influence its image quality on optical detection receiver,
Accuracy and clarity and limit aiming, identification and trace ability of the aircraft to target, therefore, the school of aero-optical effect
Positive important in inhibiting.
A kind of aero-optical effect means for correcting is proposed in the prior art, which passes through Hartmann wave front sensor reality
When measure wavefront distortion, then by original digital image data that the wavefront distortion real time correction absorbs to restore to obtain clearly image
Data.
In the aero-optical effect means for correcting of the prior art, wavefront distortion is measured using Hartmann wave front sensor, and
The sensor involves great expense so that the cost of whole device is higher, and since the sensor needs to carry out initially before use
Change operation (as demarcated and debugging) and difficulty is larger, increases the operation complexity of whole device.
Invention content
The purpose of the present invention is to provide a kind of pneumatic degraded images measured based on direct point spread function to restore correction
System distorts source by the point spread function corresponding to wavefront distortion caused by aero-optical effect by directly acquiring laser
Number, to realize the recovery of degraded image caused by above-mentioned wavefront distortion, system complexity is relatively low, and minimize, cost compared with
It is low and practicability is stronger.
In a first aspect, an embodiment of the present invention provides a kind of pneumatic degraded image measured based on direct point spread function is multiple
Former correction system, the system specifically include：Harvester, measuring device and restoring means；
The harvester, for obtaining the target area image disturbed by pneumatic shock 1ayer；
The measuring device obtains focusing on the far field focus hot spot outside pneumatic shock 1ayer for emitting laser beam；It connects
Receive the distorted wavefront that the scattering light wave of the far field focus hot spot generates after pneumatic shock 1ayer；Using in Fu of lens imaging
Leaf transformation property carries out opto-electronic conversion after being imaged to the distorted wavefront, obtains the corresponding point spread function of the distorted wavefront
Number；
The restoring means is used for the target area image to being disturbed by pneumatic shock 1ayer and the point spread function
Number carries out de-convolution operation, obtains the restored image of target area.
With reference to first aspect, an embodiment of the present invention provides the first possible embodiments of first aspect, wherein institute
It includes laser, far field beam focalizer, the first camera lens and imaging sensor to state measuring device.
The laser, for emitting laser beam；
The far field beam focalizer includes：Lens and telescope；The far field beam focalizer and the laser
With setting, for carrying out compression processing to the angle of divergence of the laser beam according to the lens, using telescope to compression at
The laser beam after reason is focused processing, obtains small area far field focus hot spot, to improve the far field focus light
The measurement accuracy for the corresponding point spread function of distorted wavefront that the scattering light wave of spot generates after pneumatic shock 1ayer；
First camera lens, what the scattering light wave for receiving the far field focus hot spot generated after pneumatic shock 1ayer
Distorted wavefront handles the distorted wavefront according to optical principle, obtains laser facula signal；
Described image sensor is electrically connected with first camera lens, for receiving the laser facula signal, is swashed to described
Light spot signal carries out opto-electronic conversion processing, obtains the corresponding point spread function of the distorted wavefront.
The possible embodiment of with reference to first aspect the first, an embodiment of the present invention provides second of first aspect
Possible embodiment, wherein described image sensor includes photoelectric converter, signal amplification module, sampling module and analysis
Module；
The photoelectric converter is electrically connected with first camera lens, for receiving the laser facula signal, is swashed to described
Light spot signal carries out opto-electronic conversion processing, obtains electric impulse signal；The electric impulse signal corresponds to the point spread function；
The signal amplification module is electrically connected with the photoelectric converter, for receiving the electric impulse signal, to described
Electric impulse signal is amplified processing, obtains amplified electric impulse signal；
The sampling module is electrically connected with the signal amplifier, for receiving amplified electric impulse signal, according to pre-
If space interval carries out sampling processing to the amplified electric impulse signal, digital electric signal is obtained；
The analysis module is electrically connected with the sampling module, for receiving the digital electric signal, to the number electricity
Signal carries out energy spectrometer processing, obtains the light intensity Energy distribution of the laser facula signal；The light intensity Energy distribution corresponds to
In the point spread function.
With reference to first aspect, an embodiment of the present invention provides the third possible embodiments of first aspect, wherein institute
It includes the second camera lens, infrared detector and signal processor to state harvester；
The target light wave is sent to described by second camera lens, the target light wave for receiving target area transmission
Infrared detector；Wherein, the target light wave is disturbed by pneumatic shock 1ayer, and carries the original image of target area；
The infrared detector, for extracting the corresponding infra-red radiation heat of the target light wave, by the infra-red radiation
Heat is converted to analog electrical signal；
The signal processor, for the analog electrical signal to be converted to corresponding digital signal, and to the number
Signal carries out analyzing processing, obtains target area image corresponding with the digital signal.
The third possible embodiment with reference to first aspect, an embodiment of the present invention provides the 4th kind of first aspect
Possible embodiment, wherein the system also includes spectroscopes；
The spectroscope, the scattering light wave for receiving the far field focus hot spot generate abnormal after pneumatic shock 1ayer
The target light wave for becoming wavefront and the target area, according to spectral characteristic respectively to the distorted wavefront and the target light wave into
Row separating treatment obtains the black light of the corresponding visible light wave of visible light part and the target light wave of the distorted wavefront
The corresponding infrared waves in part.
The 4th kind of possible embodiment with reference to first aspect, an embodiment of the present invention provides the 5th kind of first aspect
Possible embodiment, wherein the system also includes optical match devices；
The optical match device, the visible light wave isolated for receiving the spectroscope, will be described visible
Light wave is sent to the measuring device, to make the spectroscope and the measuring device match setting.
The 5th kind of possible embodiment with reference to first aspect, an embodiment of the present invention provides the 6th kind of first aspect
Possible embodiment, wherein the restoring means includes processor and display；
The processor, point spread function and the harvester for receiving the measuring device output respectively are sent
The target area image, according to the original of the target area image, the point spread function and the target area
Convolution relation between image carries out de-convolution operation processing to the target area image and the point spread function, obtains
The restored image of the target area corresponding with the target area image；
The display, the restored image for showing the target area.
Pneumatic degraded image recovery system provided in an embodiment of the present invention based on direct point spread function is filled using acquisition
Set, measuring device and restoring means entirely to restore correction system integration and automation, with Pneumatic light in the prior art
The measurement that effect calibration device carries out wavefront distortion using the Hartmann wave front sensor to involve great expense is learned, initialization and nothing are needed
Method directly obtains point spread function and leads to that device operation complexity is higher to be compared, and is to measure to fill by rebuilding laser source of distorting
The distortion measurement set provides enough visible light waves, and above-mentioned measuring device can directly obtain the corresponding point diffusion of distorted wavefront
Function；Target area image is obtained further through above-mentioned harvester；Finally target area image and point are carried out using restoring means
De-convolution operation between spread function, to realize that the recovery of degraded image real-time high-efficiency corrects, above-mentioned recovery correction system is logical
Lens are crossed to directly acquire the point spread function of distorted wavefront and realize the efficient of degraded image by the method for image deconvolution
Restore correction, whole system complexity is relatively low, and minimize, cost is relatively low and practicability is stronger.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment cited below particularly, and coordinate
Appended attached drawing, is described in detail below.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 shows the pneumatic degraded image recovery system based on direct point spread function that the embodiment of the present invention is provided
Structural schematic diagram；
Fig. 2 shows the pneumatic degraded image recovery systems based on direct point spread function that the embodiment of the present invention is provided
The structural schematic diagram of middle measuring device；
Fig. 3 shows the pneumatic degraded image recovery system based on direct point spread function that the embodiment of the present invention is provided
Concrete application scene figure；
Fig. 4 shows the pneumatic degraded image recovery system based on direct point spread function that the embodiment of the present invention is provided
The structural schematic diagram of middle imaging sensor；
Fig. 5 shows the pneumatic degraded image recovery system based on direct point spread function that the embodiment of the present invention is provided
The structural schematic diagram of middle harvester；
Fig. 6 shows the pneumatic degraded image recovery system based on direct point spread function that the embodiment of the present invention is provided
The structural schematic diagram of middle restoring means.
Main element symbol description：
11, harvester；22, measuring device；33, restoring means；44, spectroscope；55, optical match device；111,
Two camera lenses；112, infrared detector；113, signal processor；221, laser；222, far field beam focalizer；223, the first mirror
Head；224, imaging sensor；331, processor；332, display；2241, photoelectric converter；2242, signal amplification module；
2243, sampling module；2244, analysis module.
Specific implementation mode
Below in conjunction with attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Usually exist
The component of the embodiment of the present invention described and illustrated in attached drawing can be arranged and be designed with a variety of different configurations herein.Cause
This, the detailed description of the embodiment of the present invention to providing in the accompanying drawings is not intended to limit claimed invention below
Range, but it is merely representative of the selected embodiment of the present invention.Based on the embodiment of the present invention, those skilled in the art are not doing
The every other embodiment obtained under the premise of going out creative work, shall fall within the protection scope of the present invention.
Hartmann wave front sensor is used to measure the aero-optical effect means for correcting of wavefront distortion in the prior art, due to
Microlens array involves great expense and makes the cost of device higher in above-mentioned Wavefront sensor, and above-mentioned microlens array will be detected
Distorted wavefront is separated into several corrugateds and obtains the spot array of corresponding number and the energy comparison of light intensity is caused to disperse, signal-to-noise ratio
It is relatively low, in addition, above-mentioned Wavefront sensor also needs to carry out initialization operation before use, so as to cause the complicated for operation of the device
Degree is higher.
To solve the above-mentioned problems, it is pneumatically moved back based on what direct point spread function measured an embodiment of the present invention provides a kind of
Change image restoration and correct system, which realizes the efficient recovery of degraded image by the method for directly acquiring point spread function
Correction, whole system complexity is relatively low, and minimize, cost is relatively low and practicability is stronger.
The concrete structure of pneumatic degraded image recovery system provided in an embodiment of the present invention based on direct point spread function
It is as follows：
Referring to Fig. 1, an embodiment of the present invention provides a kind of pneumatic degraded image measured based on direct point spread function is multiple
Former correction system, the system specifically include：Harvester 11, measuring device 22 and restoring means 33；
Harvester 11, for obtaining the target area image disturbed by pneumatic shock 1ayer；
Measuring device 22 obtains focusing on the far field focus hot spot outside pneumatic shock 1ayer for emitting laser beam；It receives
The distorted wavefront that the scattering light wave of far field focus hot spot generates after pneumatic shock 1ayer；Utilize the Fourier transformation of lens imaging
Property is directly imaged distorted wavefront, and imaging facula obtains the corresponding point spread function of distorted wavefront after opto-electronic conversion；
Restoring means 33 carries out warp for the target area image to being disturbed by pneumatic shock 1ayer with point spread function
Product operation, obtains the restored image of target area.
Pneumatic degraded image recovery system provided in an embodiment of the present invention based on direct point spread function, with the prior art
In aero-optical effect means for correcting the measurement of wavefront distortion is carried out using the Hartmann wave front sensor that involves great expense, need
Initialization and point spread function can not be directly obtained and lead to that device operation complexity is higher to be compared, passed through and rebuild laser distortion
Source provides enough visible light waves for the distortion measurement of measuring device 22, and above-mentioned measuring device 22 can directly obtain distortional wave
Preceding corresponding point spread function；Target area image is obtained further through above-mentioned harvester 11；Finally utilize restoring means 33 into
De-convolution operation between row target area image and point spread function, to realize that the recovery of degraded image real-time high-efficiency corrects,
Above-mentioned recovery correction system by lens directly acquires the point spread function of distorted wavefront and by the method for image deconvolution reality
Showed degraded image efficient recovery correction, whole system complexity is relatively low, and minimize, cost is relatively low and practicability is stronger.
Specifically, in view of the intake of image in imaging system of taking photo by plane is using UAV as aerial platform, with special
With camera, video camera and video wireless transmission technical limit spacing information, image information is handled with computer, and according to
The image that certain required precision obtains, it includes acquisition that the pneumatic degraded image that the embodiment of the present invention is provided, which restores correction system,
Device 11, the harvester 11 are the optical devices for photography, using the straightline propagation property of light and the law of refraction of light, with
Photon is carrier, the optical information amount of the image data of certain flashy measured target, passes through harvester 11 with energy mode
Camera lens acquisition image information pass to photosensitive material, eventually become visual target area image.In order to better meet
It takes photo by plane daytime the dual requirements taken photo by plane with night, it is contemplated that infrared thermal imaging technique detectivity is strong, and operating distance is remote, and daytime is black
Night such as can work normally at the good characteristics, and the embodiment of the present invention is preferably using infrared thermoviewer as harvester 11.This is red
Outer thermography is corresponding with the heat distribution field of body surface, and the Temperature Distribution of body surface is converted to the visible target area of human eye
Area image, observation imaging effect is good, and is not easily susceptible to the influence of the adverse weather conditions such as rain, mist so that acquisition system of taking photo by plane
Robustness is preferable.When being transmitted in an atmosphere in view of laser, since the refractive index of substance in air is uneven, lead to incidence wave wave
The disturbance in face, will cause the part energy in incidence wave can deviate the former direction of propagation when encountering atmospheric particles and to four sides eight
The negative direction of side is propagated.It is abnormal that the present invention, which is the research based on above-mentioned atmospheric backscatter characteristic by rebuilding laser source of distorting,
Become the real-time survey that wavefront distortion caused by the distortion source under pneumatic shock wave is carried out while measurement provides enough visible light waves
Amount.Therefore, it includes measuring device 22 that the pneumatic degraded image that the embodiment of the present invention is provided, which restores correction system, on the one hand weight
Laser distortion source is built, emits laser beam, and to laser beam focusing processing, obtained outside pneumatic shock 1ayer corresponding remote
Field focal beam spot, after the substances such as the same atmospheric particles of far field focus hot spot, the aerosol interact, after according to air
Influence to scattering phenomenon, above-mentioned substance is by scattering corresponding to the scattering light wave of far field focus hot spot；On the other hand, above-mentioned measurement
Device 22 is additionally operable to receive the distorted wavefront that above-mentioned scattering light wave generates after pneumatic shock 1ayer, using in Fu of lens imaging
Leaf transformation property is directly imaged distorted wavefront, and imaging facula is the corresponding point diffusion of distorted wavefront after opto-electronic conversion
Function, has abandoned the Hartmann wave front sensor calculating complicated in wave front restoration and point spread function calculating, therefore can be with
Raising system process bandwidth, reduces the power consumption of system.
For the ease of the further analyzing processing to above-mentioned point spread function and target area image, the embodiment of the present invention is also
Include restoring means 33, which also receives and adopt for receiving the point spread function that measuring device 22 obtains
Acquisition means 11 obtain target area image, by target area image, the original image of target area and point spread function it
Between convolution relation, realized using Deconvolution Technique and the high resolution of target area image restored, obtain answering for target area
Original image, restored image quality is high, improves the resolving power for imaging system of taking photo by plane.
Further, referring to Fig. 2, measuring device 22 provided in an embodiment of the present invention includes laser 221, the laser
221 type and performance requirement depends on specific detection target, and above-mentioned performance indicator mainly has output wavelength, energy and its steady
Qualitative, repetition rate, beam divergence angle and laser pulse width etc..Consider specific application scenarios, the present invention is implemented
Laser 221 in example can be according to laser beam corresponding with the corresponding pre-set level parameter transmitting of above-mentioned performance indicator.
In order to improve the measurement accuracy of point spread function, the measuring device 22 in the embodiment of the present invention further includes far field beam
Focalizer 222, the far field beam focalizer 222 can first compress the waist radius of laser beam with a lens, then with one
The angle of divergence of long focus lens compression laser beam, processing is focused finally by telescope by compressed laser beam,
Small area far field focus hot spot is obtained outside shock 1ayer, the far field focus hot spot light distribution concentration and energy density greatly, orientation
Shine, brightness is high, color is extremely pure, to further improve the scattering light wave of far field focus hot spot after pneumatic shock 1ayer
The measurement accuracy of the corresponding point spread function of distorted wavefront of generation.
In view of traditional uses Hartmann wave front sensor after measuring wavefront distortion information, it is also necessary to pass through correlation
Processing unit carry out the recovery of distortion information to obtain distorted wavefront, operation complexity it is higher and due to the Wavefront sensor from
The characteristic of body leads to the corresponding light energy dispersion of spot array, and noise is relatively low, and to solve the above-mentioned problems, the present invention is implemented
Measuring device 22 in example is using the first camera lens 223 point spread function corresponding with the progress wavefront distortion of imaging sensor 224
Directly measure.Specifically, the scattering light wave that above-mentioned first camera lens 223 receives far field focus hot spot generates after pneumatic shock 1ayer
Distorted wavefront, distorted wavefront is handled according to optical principle, obtains laser facula signal, and imaging sensor 224 is then
Above-mentioned laser facula signal is received, converts corresponding light intensity signal to electric signal, obtains the corresponding point spread function of distorted wavefront
Number.
Wherein, it is contemplated that CCD (Charge-coupled Device, charge coupled cell) device has luminous sensitivity
The advantages that height, low noise, referring to Fig. 3, the imaging sensor 224 that the embodiment of the present invention is provided preferably uses CCD camera, and
The target surface of CCD camera is set at the focal plane of above-mentioned first camera lens 223, according to the optics speciality of imaging lens, CCD camera target surface
The light distribution at place corresponds to the point spread function that pneumatic shock 1ayer disturbs the hot spot to be formed.
In addition, a luminous point is only presented in the focal plane of the first camera lens 223 by distorted wavefront, it is right compared to microlens array
For the multiple hot spots answered, energy is more concentrated, and noise is relatively high, and obtained light distribution stability is good and has directly obtained abnormal
Become the corresponding point spread function of wavefront, and under the conditions of same accuracy, measurement reduces light energy demand, reduces Laser emission system
The power of system；Under conditions of same incident laser energy, the signal-to-noise ratio of system is improved, to improve the measurement of point spread function
Precision.With carry out the restoration disposal of distortion information again for obtaining point spread function indirectly, simplify operating procedure, and at
This relatively low, miniaturization, practicability is stronger, can more meet the needs of users.
Further, referring to Fig. 4, above-mentioned imaging sensor 224 includes photoelectric converter 2241, signal amplification module
2242, sampling module 2243 and analysis module 2244, the photoelectric converter 2241 are used to receive the first camera lens 223 and focus presentation
Laser facula signal carries out opto-electronic conversion processing to the laser facula signal, obtains electric impulse signal.
In view of inevitably decaying in signals transmission, the pneumatic degraded image that the embodiment of the present invention is provided is multiple
Former correction system further includes signal amplification module 2242, which is amplified place to above-mentioned electric impulse signal
Reason, according to default amplification factor, the electric impulse signal that is amplified.
In addition, in order to preferably carry out the analysis and processing of signal, the embodiment of the invention also includes sampling module 2243, with
Above-mentioned amplified electric impulse signal is carried out according to pre-set space interval, using processing, to obtain discrete digital electric signal, so
The light intensity energy point of laser facula signal is obtained by the connection relation of analysis module 2244 and above-mentioned sampling module 2243 again afterwards
Cloth, wherein the light intensity Energy distribution corresponds to above-mentioned point spread function.
Further, provided in an embodiment of the present invention referring to Fig. 5 in order to preferably carry out the acquisition of target area image
Harvester 11 includes the second camera lens 111, infrared detector 112 and signal processor 113；Wherein,
Above-mentioned second camera lens 111 is used to receive the target light wave of target area transmission, and target light wave is sent to infrared spy
Device 112 is surveyed, which then extracts the corresponding infra-red radiation heat of target light wave, infra-red radiation heat is converted to
Above-mentioned analog electrical signal is converted to corresponding digital signal, to the number by corresponding analog electrical signal by signal processor 113
Word signal carries out analyzing processing, obtains corresponding target area image.
It is worth mentioning that in order to preferably ensure that the accuracy and accuracy of system compensation, the embodiment of the present invention are preferred
Select identical optical parameter, above-mentioned optical parameter to include at least focal length ginseng on the second camera lens 111 and above-mentioned first camera lens 223
Number.
Further, in order to ensure the same of measurement that imaging sensor 224 has enough visible light wave to realize wavefront distortion
When can ensure that harvester 11 has enough luminous energy to be imaged again, above-mentioned recovery correction system further includes spectroscope 44, ginseng
See Fig. 3, which is made of optical glass coating, and the scattering light wave for receiving far field focus hot spot respectively swashs by pneumatic
The target light wave of the distorted wavefront and target area that are generated after wave layer, by spectral space chromatic dispersion principle according to different Spectral Properties
Property distribution distorted wavefront and target light wave are subjected to separating treatment respectively, the visible light part for obtaining distorted wavefront is corresponding visible
The corresponding infrared waves in black light part of light wave and target light wave.Wherein, pass through the centrifugation of spectroscope 44 so that weight
The laser distortion source built has enough visible light waves to ensure the accuracy and precision of point spread function measurement；And to adopt
There are acquisition means 11 enough infrared waves to be imaged, and two parts of light waves glitch-free can then work independently, and preferably ensure
The analyzing processing of next step.
In addition, in order to ensure the matching setting of spectroscope 44 and the first camera lens 223, it is provided in an embodiment of the present invention pneumatically to move back
It further includes having optical match device 55 to change image restoration correction system, and referring to Fig. 3, the optical match device 55 is by a series of optics
Device forms, and the visible light wave for isolating spectroscope 44 matched can be sent in the first camera lens 223.Wherein, on
It refers to that 44 transmitting terminal of spectroscope matches with the receiving terminal of the first camera lens 223 to state matching setting.
Further, referring to Fig. 6, the restoring means 33 that the embodiment of the present invention is provided includes processor 331 and display
332；Wherein,
The target that above-mentioned processor 331 receives the point spread function of the output of measuring device 22 respectively and harvester 11 is sent
Then area image is closed further according to the convolution between target area image, point spread function and the original image of target area
System is obtained corresponding with target area image by carrying out de-convolution operation processing to target area image and point spread function
The restored image of target area shows the restored image finally by display 332 in real time, after restoring correction
The quality of above-mentioned restored image is preferable so that the resolving power for imaging system of taking photo by plane is higher, wherein aforementioned display device 332 can be
Computer screen can also be any display device with display function.
Pneumatic degraded image recovery system provided in an embodiment of the present invention based on direct point spread function, with the prior art
In aero-optical effect means for correcting the measurement of wavefront distortion is carried out using the Hartmann wave front sensor that involves great expense, need
Initialization and point spread function can not be directly obtained and lead to that device operation complexity is higher to be compared, passed through and rebuild laser distortion
Source provides enough visible light waves for the distortion measurement of measuring device 22, and above-mentioned measuring device 22 can directly obtain distortional wave
Preceding corresponding point spread function；Target area image is obtained further through above-mentioned harvester 11；Finally utilize restoring means 33 into
De-convolution operation between row target area image and point spread function, to realize that the recovery of degraded image real-time high-efficiency corrects,
Above-mentioned recovery correction system by lens directly acquires the point spread function of distorted wavefront and by the method for image deconvolution reality
Showed degraded image efficient recovery correction, whole system complexity is relatively low, and minimize, cost is relatively low and practicability is stronger.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In the several embodiments provided, it should be understood that disclosed systems, devices and methods can pass through it
Its mode is realized.The apparatus embodiments described above are merely exemplary, for example, the division of the unit, only
A kind of division of logic function, formula that in actual implementation, there may be another division manner, in another example, multiple units or component can combine
Or it is desirably integrated into another system, or some features can be ignored or not executed.Another point, shown or discussed phase
Coupling, direct-coupling or communication connection between mutually can be by some communication interfaces, the INDIRECT COUPLING of device or unit or
Communication connection can be electrical, machinery or other forms.
The unit illustrated as separating component may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, you can be located at a place, or may be distributed over multiple
In network element.Some or all of unit therein can be selected according to the actual needs to realize the mesh of this embodiment scheme
's.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it can also
It is that each unit physically exists alone, it can also be during two or more units be integrated in one unit.
It, can be with if the function is realized in the form of SFU software functional unit and when sold or used as an independent product
It is stored in a computer read/write memory medium.Based on this understanding, technical scheme of the present invention is substantially in other words
The part of the part that contributes to existing technology or the technical solution can be expressed in the form of software products, the meter
Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be
People's computer, server or network equipment etc.) it performs all or part of the steps of the method described in the various embodiments of the present invention.
And storage medium above-mentioned includes：USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), arbitrary access are deposited
The various media that can store program code such as reservoir (RAM, Random Access Memory), magnetic disc or CD.
Innovative point of the present invention, and applied in systems in practice：
Other devices need first to measure distorted wavefront by Hartmann wave front sensor, are then calculated again by distorted wavefront
Point spread function, the image for finally obscuring the target area disturbed by pneumatic shock 1ayer carry out deconvolution with point spread function
Operation obtains clearly image, realizes as sharpening processing.
In short, between the present invention and existing apparatus the difference is that using more simple and practical point spread function measurement side
Method is directly imaged distorted wavefront using the Fourier transform property of lens imaging, imaging facula is after opto-electronic conversion
The as corresponding point spread function of distorted wavefront.Compared with the scheme of front, mainly there are following two advantages：
(1) Hartmann wave front sensor needs spot array to measure distorted wavefront and then obtains point spread function, the present invention
Single hot spot is only needed to can be obtained by point spread function, under the conditions of same accuracy, measurement reduces light energy demand, reduces
The power of laser transmitting system；Under conditions of same incident laser energy, the signal-to-noise ratio of system is improved, to improve a diffusion
The measurement accuracy of function.
(2) present invention is directly imaged distorted wavefront using the Fourier transform property of lens imaging, imaging facula
It is the corresponding point spread function of distorted wavefront after opto-electronic conversion.Hartmann wave front sensor has been abandoned in wave front restoration and point
Complicated calculating when spread function calculates, therefore system process bandwidth can be improved, reduce the power consumption of system.
Integrate, the present invention can reduce system complexity, the miniaturization of system easy to implement, high reliability and it is low at
This.The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any to be familiar with
Those skilled in the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all cover
Within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (6)
1. a kind of pneumatic degraded image recovery system based on direct point spread function, it is characterised in that including：Harvester, survey
Measure device and restoring means；
The harvester, for obtaining the target area image disturbed by pneumatic shock 1ayer；
The measuring device obtains focusing on the far field focus hot spot outside pneumatic shock 1ayer for emitting laser beam；Receive institute
State the distorted wavefront that the scattering light wave of far field focus hot spot generates after pneumatic shock 1ayer；Become using the Fourier of lens imaging
Transsexual confrontation distorted wavefront is directly imaged, and imaging facula obtains the corresponding point spread function of distorted wavefront after opto-electronic conversion
Number；
The restoring means, for the target area image that disturb by pneumatic shock 1ayer and the point spread function into
Row de-convolution operation obtains the restored image of target area；
The measuring device includes laser, far field beam focalizer, the first camera lens and imaging sensor；
The laser, for emitting laser beam；
The far field beam focalizer includes：Lens and telescope；The far field beam focalizer is matched with the laser to be set
Set, for carrying out compression processing to the angle of divergence of the laser beam according to the lens, using telescope to compression processing after
The laser beam be focused processing, small area far field focus hot spot is obtained, to improve the far field focus hot spot
The measurement accuracy for the corresponding point spread function of distorted wavefront that scattering light wave generates after pneumatic shock 1ayer；
First camera lens, the distortion that the scattering light wave for receiving the far field focus hot spot generates after pneumatic shock 1ayer
Wavefront handles the distorted wavefront according to optical principle, obtains laser facula signal；
Described image sensor is electrically connected with first camera lens, for receiving the laser facula signal, to the laser light
Spot signal carries out opto-electronic conversion processing, obtains the corresponding point spread function of the distorted wavefront.
2. the pneumatic degraded image recovery system according to claim 1 based on direct point spread function, it is characterised in that：
Described image sensor includes photoelectric converter, signal amplification module, sampling module and analysis module；
The photoelectric converter is electrically connected with first camera lens, for receiving the laser facula signal, to the laser light
Spot signal carries out opto-electronic conversion processing, obtains electric impulse signal；The electric impulse signal corresponds to the point spread function；
The signal amplification module is electrically connected with the photoelectric converter, for receiving the electric impulse signal, to the electric arteries and veins
It rushes signal and is amplified processing, obtain amplified electric impulse signal；
The sampling module is electrically connected with the signal amplification module, for receiving amplified electric impulse signal, according to default
Space interval carries out sampling processing to the amplified electric impulse signal, obtains digital electric signal；
The analysis module is electrically connected with the sampling module, for receiving the digital electric signal, to the digital electric signal
Energy spectrometer processing is carried out, the light intensity Energy distribution of the laser facula signal is obtained；The light intensity Energy distribution corresponds to institute
State point spread function.
3. the pneumatic degraded image recovery system according to claim 1 based on direct point spread function, it is characterised in that：
The harvester includes the second camera lens, infrared detector and signal processor；
Second camera lens, the target light wave for receiving target area transmission, the target light wave is sent to described infrared
Detector；Wherein, the target light wave is disturbed by pneumatic shock 1ayer, and carries the original image of target area；
The infrared detector, for extracting the corresponding infra-red radiation heat of the target light wave, by the infra-red radiation heat
Be converted to analog electrical signal；
The signal processor, for the analog electrical signal to be converted to corresponding digital signal, and to the digital signal
Analyzing processing is carried out, target area image corresponding with the digital signal is obtained.
4. the pneumatic degraded image recovery system according to claim 3 based on direct point spread function, it is characterised in that：
It further include spectroscope；
The spectroscope, the distortional wave that the scattering light wave for receiving the far field focus hot spot generates after pneumatic shock 1ayer
The target light wave of the preceding and described target area respectively divides the distorted wavefront and the target light wave according to spectral characteristic
From processing, the black light part of the corresponding visible light wave of visible light part and the target light wave of the distorted wavefront is obtained
Corresponding infrared waves.
5. the pneumatic degraded image recovery system according to claim 4 based on direct point spread function, it is characterised in that：
It further include optical match device；
The optical match device, the visible light wave isolated for receiving the spectroscope, by the visible light wave
It is sent to the measuring device, to make the spectroscope and the measuring device match setting.
6. the pneumatic degraded image recovery system according to claim 5 based on direct point spread function, it is characterised in that：
The restoring means includes processor and display；
The processor, the institute that point spread function and the harvester for receiving the measuring device output respectively are sent
Target area image is stated, according to the original image of the target area image, the point spread function and the target area
Between convolution relation, de-convolution operation processing is carried out to the target area image and the point spread function, is obtained and institute
State the restored image of the corresponding target area of target area image；
The display, the restored image for showing the target area.
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| EP3502744B1 (en) * | 2017-12-20 | 2020-04-22 | Leica Geosystems AG | Near-field pulse detection |
| CN109257524B (en) * | 2018-09-13 | 2020-10-02 | 北京信息科技大学 | Full-focus scanning imaging method based on Wigner distribution function |
| CN110146180B (en) * | 2019-05-22 | 2020-08-28 | 重庆连芯光电技术研究院有限公司 | Large-view-field image sharpening device and method based on focal plane Hartmann wavefront sensor |
| CN111246053B (en) * | 2020-01-22 | 2022-07-12 | 维沃移动通信有限公司 | Image processing method and electronic device |
| CN111476722B (en) * | 2020-03-12 | 2023-04-28 | 哈尔滨工业大学(深圳)(哈尔滨工业大学深圳科技创新研究院) | Image restoration method and device based on point spread function and related equipment thereof |
| CN111721233B (en) * | 2020-06-19 | 2022-05-31 | 广州立景创新科技有限公司 | Three-dimensional sensing device, light emitting module and control method thereof |
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