CN106327435A - Image restoration imaging system, image restoration system, image obtaining method and image restoration method - Google Patents
Image restoration imaging system, image restoration system, image obtaining method and image restoration method Download PDFInfo
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Abstract
The application provides an image restoration imaging system, an image restoration system, an image obtaining method and an image restoration method. The image restoration imaging system comprises image acquisition equipment, a range finder, a rotating mirror frame, a plane mirror, a target simulator and a processor. The target simulator includes an imaging device and a target. The target simulates the distance between a target object and the image acquisition equipment through the imaging device, and switches the optical paths of the image acquisition equipment through the rotating mirror frame and the plane mirror, so the image acquisition equipment can acquire a target object image and a target image in real time, and the point spread function of the obtained target image and the point spread function of the obtained target object image are the same. By measuring the point spread function of the target image, a more accurate point spread function of the target object image can be obtained. The target object image is restored according to the obtained point spread function, and the effect of image restoration is better.
Description
Technical field
The present invention relates to image restoration field, particularly to a kind of image restoration imaging system and image restoration system, figure
As preparation method and image recovery method.
Background technology
In actual optical system imaging, optical aberration, alignment error, each noise like and sensor nonlinear distortion
And the uncertain factor of imaging link is all likely to result in the fuzzy of image.Recover the process that picture rich in detail is a deconvolution, profit
The core restored image with non-blind deconvolution is the most accurately to estimate point spread function (PSF, Point Spread
Function)。
At present, the estimation of PSF can be by the simulation calculation of optical design software, optical path difference measurement such as CODE V or Zemax
The means such as method, Bar Method obtain, and Bar Method the most of the prior art is before dispatching from the factory, and the camera specifying model is carried out difference
Point spread function calibration under object distance, determines point spread function corresponding under each object distance, during follow-up shooting image, uses this appointment
Model camera photographic subjects object, and during to image restoration, determine the point spread function of correspondence according to object distance, it is achieved image is multiple
Former.But the camera parameter corresponding with when carrying out image restoration due to shooting the used camera of image cannot keep completely the same, right
The recovery of image produces error.
Therefore, a kind of image restoration imaging system improving point spread function measurement accuracy and method are needed badly.
Summary of the invention
In view of this, the present invention provide a kind of image restoration imaging system and image restoration system, image obtainment method and
Image recovery method, to solve the inaccurate problem of point spread function measurement in image recovery method of the prior art.
For achieving the above object, the present invention provides following technical scheme:
A kind of image restoration imaging system, including:
Image capture device (7), diastimeter (6), rotation mirror holder (2), plane mirror (1), target simulator and process
Device (8)；
Described target simulator includes imaging device (3) and target (4), and the dead-center position of described target (4) is positioned at described
The focal position of imaging device (3), described imaging device (3) is for pooling picture by described target；
Described plane mirror (1) is arranged on described rotation mirror holder (2), and described rotation mirror holder (2) is used for rotating described
Plane mirror (1), gathers the light path of image of described target object or gathers described switching described image capture device (7)
The light path of the image of target (4)；
Described diastimeter (6) is for measuring the first distance, and described first distance gathers mesh for described image capture device (7)
During mark subject image, the distance between described target object and described image capture device (7)；
The first distance that described processor (8) sends according to described diastimeter (6), is calculated second distance, and described
The distance that two distances are moved by described dead-center position for described target (4) so that the mobile described second distance of described target (4)
After, sequentially pass through described imaging device (3), described plane mirror (1) mould in described image capture device (7) during imaging
Quasi-distance with described first apart from equal.
Preferably, described target simulator also includes that lighting source (9), described lighting source (9) are used for illuminating described target
Mark (4).
Preferably, also include translation stage (5), be used for carrying and mobile described target (4).
Preferably, described target is multiple black and white lattice black and white lattice targets alternately.
Preferably, described target object is just to described image capture device (7), and is positioned at described image capture device (7)
Optical axis on.
Preferably, the optical axis of described imaging device (3) is vertical with the optical axis of described image capture device (7).
The present invention also provides for a kind of image restoration system, including image restoration imaging system recited above and image procossing
Device.
It addition, the present invention also provides for a kind of image obtainment method, described image obtainment method is based on image recited above
Restoring imaging system, described image restoration imaging system at least includes: image capture device, diastimeter, rotation mirror holder, plane are anti-
Penetrate mirror, imaging device, target and processor；
Described image obtainment method includes:
Rotate described plane mirror, make described image capture device gather the image of target object；
By described stadia surveying the first distance, described first distance becomes in described image capture device for target object
Distance during picture, between described target object and described image capture device；
Sending described first distance to described processor, described processor is calculated second distance, described second away from
From the distance moved by dead-center position for described target；
Mobile described target second distance；
Rotate described plane mirror, make described image capture device gather the image of described target.
The target object image obtained based on image obtainment method recited above and target image, the present invention also provides for one
Plant image recovery method, including:
Described target image is divided into multiple region；
Calculate the point spread function that each region is corresponding respectively；
Regional point spread function is carried out interpolation processing, it is thus achieved that described target image in described target image full filed
Point spread function data；
Go to roll up to target object image according to the point spread function data in the described target image full filed obtained
Long-pending calculating, it is thus achieved that restored image.
Understanding via above-mentioned technical scheme, the image restoration imaging system that the present invention provides includes: image capture device,
Diastimeter, rotation mirror holder, plane mirror, target simulator and processor, described target simulator includes imaging device and target
Mark；Target is by the distance between imaging device simulated target object and image capture device, anti-with plane by rotating mirror holder
Penetrate the light path of mirror switching image capture device so that image capture device can gather target object image and target the most respectively
Logo image, owing in two light paths, the object distance of image capture device is identical so that the point spread function of the target image of acquisition with
The point spread function of target object image identical, by the point spread function of target image is measured such that it is able to
Point spread function to target object image more accurately.
Further, the present invention also provides for image restoration system, including above-mentioned image restoration imaging system, it is possible to obtain with
Target image that the shooting distance of target object is identical and image processing apparatus；The present invention also provides for a kind of image obtainment method
And image recovery method, the target figure that the shooting distance with target object that obtains based on above-mentioned image restoration imaging system is identical
Picture, calculates the point spread function of described target image, obtains the point spread function of target object image, and then to target
Subject image is restored, owing to the point spread function of described target image and the point spread function of target object image are identical,
The restored image of target object image can be obtained according to the point spread function of target image, and, in the method, target image with
Target object image uses same image capture device, same object distance, similar shooting environmental and image-forming condition so that mesh
The acquisition of mark subject image point spread function is more accurate, and image restoration becomes apparent from.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Inventive embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to according to
The accompanying drawing provided obtains other accompanying drawing.
Fig. 1 gathers signal during target object image for a kind of image restoration imaging system that the embodiment of the present application provides
Figure；
Fig. 2 gathers schematic diagram during target image for a kind of image restoration imaging system that the embodiment of the present application provides；
A kind of image obtainment method flow chart that Fig. 3 provides for the embodiment of the present application；
A kind of image recovery method flow chart that Fig. 4 provides for the embodiment of the present application.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
Bar Method of the prior art has been applied to the later image of slr camera and has restored software, by specifying model
Camera dispatch from the factory before calibration, determine the information such as PSF under each object distance, the camera parameter bag of the optional corresponding model of user enters
Restoration disposal after behaviour, but the shortcoming of the method is apparent: although camera model is identical, but due to processing alignment error not
Can guarantee that every camera parameter is completely the same, the point spread function using default object distance corresponding carries out image restoration and can produce by mistake
Difference, and shooting environmental humiture changes, the measurement of PSF also can be impacted by the change of object distance, therefore, existing Bar Method
There is certain limitation.
The present invention provides a kind of image restoration imaging system, as it is shown in figure 1, include: image capture device 7, diastimeter 6,
Rotate mirror holder 2, plane mirror 1, target simulator and processor 8.
Image capture device 7, for gathering the image of target object and target, does not limit described image and adopts in the present embodiment
Collection equipment and target object and the position of target, it is preferable that described target object is just to image capture device 7, and is positioned at figure
As on the optical axis of collecting device 7 so that image capture device can directly gather the image of target object.Image in the present embodiment
Collecting device can be camera can also be that other can collect the device of image, without limitation in the present embodiment,
Preferably, described image capture device is camera.
Diastimeter 6 is used for measuring target object in image capture device 7 during imaging, target object and image capture device
Between distance, the distance between described target object and image capture device is the first distance defined in the present embodiment；This reality
Executing in example preferred, described diastimeter is laser range finder, and laser range finder is operationally a branch of the thinnest to target object injection
Laser, photoelectric cell receive the laser beam of target object reflection, timer measures laser beam from being transmitted into time of reception,
Thus calculate the distance from image capture device to target object.Laser range finder have lightweight, volume is little, operation is simple
Single, speed advantage soon and accurately, its error is only the one of 1/5th to hundreds of points of other optical rangefinder, therefore, originally
In embodiment preferably, described diastimeter is laser range finder.
Plane mirror 1 is arranged on rotation mirror holder 2, rotates mirror holder 2 and is used for rotary plane reflecting mirror 1, to switch image
Collecting device 7 gathers the light path of the image of described target object or gathers the light path of image of described target 4；As it is shown in figure 1, rotation
Plane mirror 1 is rotated to plane mirror place plane parallel with the optical axis of image capture device by tilting mirror frame 2, and is positioned at institute
State outside the optical axis of image capture device so that image capture device 7 can the image of direct photographic subjects object.As in figure 2 it is shown,
Rotate mirror holder 2 and plane mirror 1 is rotated the optical axis to shielded image collecting device, so that described image capture device energy
Target in enough photographic subjects simulators.
It should be noted that the present embodiment does not limit the angle of described plane mirror, as long as can be by target imaging
In image capture device, do not limit its concrete angle, it is preferred that as in figure 2 it is shown, the normal direction of plane mirror with
The optical axis angle at 45 ° of image capture device, now, the angular adjustment rotating mirror holder can be easier to be transferred to corresponding angle
Degree, and the optical axis of described imaging device 3 is vertical with the optical axis of described image capture device, position is easily arranged.It addition, in reality
In operation, target imaging optical path can be fixed, it is only necessary to regulation rotates the angle of mirror holder can realize target object and target
The switching of image acquisition.Therefore, in the present embodiment preferably, the optical axis of described imaging device 3 and described image capture device
Optical axis vertical.
Target simulator includes imaging device 3 and target 4, and target 4 is positioned at the focal position of imaging device 3, now target
Position be dead-center position.Owing to described target is positioned at the focal position of described imaging device, at imaging device opposite side with flat
Row light outgoing, simulates infinite point image objects, when moving target mark position, can simulate the image objects of limit remote, because of
This, the present embodiment provide target simulator can continuous simulation infinite as far as in-plant target, arranging position, infinity is
Target zero-bit, moves near imaging device direction and can emulate limited remote target.
In the present embodiment, target can be the dot matrix target of LED point light source composition, it is also possible to be the alternate formation of black and white lattice
Black and white lattice target plate, does not limits this in the present embodiment, it is preferable that described target is multiple black and white lattice black and white alternately
Lattice target, uses the spaced pattern of black and white lattice as target, it is possible to be more nearly preferable blade, in order to follow-up employing cutter
Sword method obtains more accurate point spread function.
It should be noted that the present embodiment does not limit concrete structure and the ingredient of described imaging device, Ke Yishi
The imaging device that the imaging device formed by the combination of multiple meniscuss can also be formed for single lens, it is also possible to for including it
The imaging device of his optical element, does not limits this in the present embodiment.For reducing the volume of image restoration imaging system, this reality
Executing in example preferred, described imaging device is that the imaging device that 1 convex lens is formed, i.e. target pass through convex lens in plane
In reflecting mirror.Target, by changing the direction of light path, is imaged in image capture device by plane mirror, thus realizes simulation
The purpose of target object.
The first distance that processor 8 sends according to diastimeter 6, be calculated target 4 by dead-center position move second away from
From, so that target 4 is through imaging device 3 imaging, then after plane mirror 1 imaging, target 4 is in image capture device 7
Simulated range and first during imaging is apart from equal.
Concrete principle is:
Diastimeter 6 records the target object the first distance L in image capture device during imaging, according to Newton's formula:
Wherein, f is the focal length of imaging device, and d is the distance that target moves to imaging device relative to dead-center position.
Processor is calculated focusing amount d:
Thus target 4 is moved d distance by dead-center position towards imaging device so that target is through imaging device imaging
After, then the imaging through plane mirror, in image capture device, the simulated range and first during imaging is apart from equal.
After above-mentioned image restoration imaging system, plane mirror not shielded image collecting device and target object it
Between light path time, image capture device gathers image to target object, forms target object image, when plane mirror rotates,
When light path to the image capture device of switching image capture device carries out image acquisition to target, generate target image.
Image restoration imaging system after packaging is accomplished, is dark room conditions inside it, in order to obtain preferable target image,
Target simulator in described image restoration imaging system can also include lighting source 9, as depicted in figs. 1 and 2, lighting source
9 are used for illuminating described target 4.
It should be noted that described image restoration imaging system can also include translation stage 5, described in carrying moving
Target 4, described translation stage is connected with described processor, focusing amount d (namely second distance) sent according to processor calculating and sending,
Mobile described target so that the analogies of target are away from gathering the first distance phase during target object image with image capture device
With, so that image capture device gathers the image of target.
The image restoration imaging system provided in the present embodiment, including image capture device, diastimeter, rotation mirror holder, puts down
Face reflecting mirror, target simulator and processor, target simulator includes imaging device and target；Target is simulated by imaging device
Distance between target object and image capture device, by rotating the light of mirror holder and plane mirror switching image capture device
Road so that image capture device can gather target object image and target image the most respectively, owing to scheming in two light paths
As the object distance of collecting device is identical so that the point spread function of the target image of acquisition and the point spread function of target object image
Identical, by the point spread function of target image is measured such that it is able to obtain target object image more accurately
Point spread function.
Another embodiment of the present invention provides a kind of image restoration system, the image restoration imaging mentioned including above example
System and image processing apparatus.
Described image restoration imaging system is used for obtaining target object image and target image, it is thus achieved that described target image
Time analogies away from obtain described target object image time shooting distance (the first distance described in a upper embodiment)
Identical.
Target object image that described image processing apparatus obtains according to image restoration imaging system and target image, survey
Measure the PSF of target image, and then further according to the target image PSF in full filed, target object image deconvoluted,
Obtain restored image.
During owing to the present embodiment obtaining target object image and target image, use same image capture device collection figure
Picture, and target analogies in time being formed with target object image first apart from equal, both light path position environment are similar,
In the case of target object and target are close together, the impact of atmospheric turbulance can be ignored, it is believed that the PSF of target image with
The PSF of target object image is identical, by measuring the PSF of target image, obtains the PSF of target object image.Use
The image restoration system that the present embodiment provides, it is possible to obtain in real time the point spread function of target object, thus improve and obtain
The accuracy of the point spread function of target object image, restores for successive image and provides accurate basis so that successive image
Recovery can be clearer.
The embodiment of the present invention also provides for a kind of image obtainment method, and described image obtainment method is based on shown in Fig. 1 and Fig. 2
Image restoration imaging system, described image restoration imaging system at least includes: image capture device, diastimeter, rotation mirror holder, flat
Face reflecting mirror, imaging device, target and processor；In the present embodiment, described image restoration imaging system can also include translation
The devices such as platform, described translation stage, for the position of moving target mark, is simulated between different target objects and image capture device
Distance.
Described image obtainment method, as it is shown on figure 3, include:
Step S101: rotate described plane mirror, makes described image capture device gather the image of target object.
In the present embodiment, do not limit the position relationship of described image capture device and target object, therefore, as long as rotating institute
State plane mirror so that described image capture device gathers the image of target object.When target object is just to described figure
As collecting device, and when being positioned on the optical axis of described image capture device, described plane mirror can be rotated to its place
The position that plane is parallel with the optical axis of described image capture device.
Step S102: by described stadia surveying the first distance, described first distance is adopted at described image for target object
Distance in collection equipment during imaging, between described target object and described image capture device.
It should be noted that above-mentioned two step can be carried out simultaneously, i.e. while carrying out image acquisition, use range finding
The first distance measured by instrument, it is also possible to substep is carried out, and the collection substep i.e. measuring the first distance and target object image is carried out, this reality
Execute in example and this is not limited.
When image capture device gathers the image of target object, image capture device is kept to be positioned at same with target object
Straight line, and target object is positioned on the optical axis of described image capture device.And described plane mirror place plane and described figure
As the optical axis of collecting device is parallel, and it is positioned at outside described image capture device optical axis, not shelter target object and image acquisition
Light path between equipment.
Step S103: sending described first distance to described processor, described processor is calculated second distance, institute
Stating second distance is the distance that described target is moved by dead-center position.
It should be noted that in the present embodiment, the initial position of target is the focal position of imaging device, define this position
For dead-center position, after the imaged device of target light, become directional light, be now the situation of target simulation infinity target, when
When needing to simulate limited remote target imaging, processor is calculated second distance according to the first distance, thus by target from zero
Point position moves on the position of correspondence, with the first distance during simulated target image objects.
Step S104: mobile described target second distance.
According to second distance, move described target to the direction near described imaging device so that described target is apart from institute
State the first distance when the range simulation of image capture device goes out target object imaging.
Step S105: rotate described plane mirror, makes described image capture device gather the image of described target.
According to the position of target imaging optical path, plane mirror is rotated the optical axis friendship to its plane with image capture device
Fork, and angled, so that described image capture device can gather the image of described target.
In the present embodiment, do not limit what the optical axis of described plane mirror place plane and image capture device intersected to form
Angular dimension, well known to a person skilled in the art, as long as the picture that can be formed by target, is symmetric to image through plane mirror and adopts
On the optical axis of collection equipment, the object distance of simulated target can be realized, this is no longer repeated by the present embodiment.Preferably, this reality
Executing in example, the angle that the optical axis of described plane mirror place plane and image capture device intersects to form is 45 °, thus target
The optical axis of imaging optical path is mutually perpendicular to the optical axis of image capture device.
Using plane mirror to rotate in the present embodiment, switching image capture device gathers the image of described target object
Light path or gather the light path of image of described target, it is achieved the switching of target object imaging optical path and target imaging optical path, two light
Road shares a set of optical system and image capture device, and the target of simply shooting is different.At the most negligible atmospheric turbulance
Under good weather, owing to the optical system of two light paths is the most consistent with image capture device, it is ensured that the simulated range of target and target
First of image capture device described in object distance is apart from identical, then it is believed that the PSF of target image and target object image
PSF is identical, by measuring the PSF of target image, can obtain the PSF of target image.
The present embodiment provides a kind of image obtainment method, uses same optical system and same image capture device in real time
Obtaining target object image and target image respectively, the PSF of described target image can substitute the PSF of target object image, from
And the point spread function of the target object image under different shooting distance can be obtained in real time, improve acquisition target object image
The accuracy of point spread function.
Based on image obtainment method described in above example, the embodiment of the present invention also provides for a kind of image recovery method,
As shown in Figure 4, including:
Step S201: described target image is divided into multiple region.
Target image is divided into by the present embodiment the dividing method in multiple region do not limit, can be from practical operation side
Just, from the point of view of, different dividing methods is used.
Step S202: calculate the point spread function that each region is corresponding respectively.
It should be noted that do not limit the concrete form of described target in this enforcement, described target can be LED point light source
The dot matrix target of composition, it is also possible to be the black and white lattice target plate of the alternate formation of black and white lattice, described target in the present embodiment preferably
For black and white lattice black and white lattice target alternately.
When the target in described image restoration imaging system is black and white lattice target, described to calculate each region respectively corresponding
The detailed process of point spread function be: utilize blade method to calculate the point spread function that each region is corresponding respectively.
Using black and white lattice juncture area adjacent for target image as blade, i.e. knife edge near normal or be parallel to sampling
Direction, can more accurate measurement space change point spread function, and can according to choose number of grid Balance Treatment speed with essence
The relation of degree, makes system meet different job demand.Calculate the point spread function in this region according to blade method, detailed process is such as
Under:
Step S202a: obtain edge-spread function curve according to knife edge；
Step S202b: edge-spread function derivation is obtained line spread function；
Step S202c: line spread function is carried out Fourier transformation and obtains one-dimensional MTF (optical transfer function), then vow
Amount computing obtains dimensional MTF；
Step S202d: carry out Fourier inversion and obtain the PSF of target image.
Corresponding target is the target of LED point light source dot matrix, uses corresponding point spread function preparation method, such as a light
Source method, does not limits this in the present embodiment.Preferably employ blade method and realize the point spread function calculating of black and white lattice target.
Step S203: regional point spread function is carried out interpolation processing, it is thus achieved that institute in described target image full filed
State the point spread function data of target image.
Described regional point spread function is carried out interpolation processing, it is thus achieved that in the point spread function data in full filed
Described interpolation processing is Hermite (Hermite) interpolation process method.The present embodiment is taked the side of cubic Hamiltonian symmetrical systems
Method obtains point spread function to obtain more multiposition, the point spread function of target image in final acquisition full filed.
Step S204: according to the point spread function data in the described target image full filed obtained to target object image
Carry out Deconvolution calculation, it is thus achieved that restored image.
Owing to first when simulated range when target shoots is taken with target object is apart from identical, can be by described target
The point spread function of logo image is considered the point spread function of target object image, therefore, according to target image in the present embodiment
Point spread function target object image is carried out Deconvolution calculation, obtain the restored image of target object image.
Wiener (wiener) is used to solve to extract a kind of of signal from noise and filters (or filtering) method.Wiener filtering
It it is one of efficient image restoration technology of comparison.According to the some diffusion in the described target image full filed obtained in the present embodiment
Function data, using the point spread function data in described full filed as initial parameter, uses Wiener filtering to target object figure
Restored image is obtained as carry out deconvoluting.Wherein, deconvolution process is included in Wiener filtering step, thus it is multiple to realize image
Former.
Wiener filtering performance is good and does not has iterative process, and its frequency-domain expression can be reduced to:
Wherein, (u v) represents degenrate function, S to Hη(u v) represents the power spectrum of noise, Sf(u v) represents non-degraded image
Power spectrum, (u v) represents the frequency-domain expression of non-degraded image to G.
The embodiment of the present invention provides a kind of image recovery method, the image obtainment method mentioned based on above example, institute
State image obtainment method and use plane based on the image restoration imaging system in above example, described image restoration imaging system
Reflecting mirror is threaded in or out the optical axis of image capture device, it is achieved target object imaging optical path and the switching of target imaging optical path,
Two light paths share a set of optical system and image capture device, and the target of simply shooting is different, when described plane mirror screws in
During the optical axis of image capture device, target is carried out imaging, when screwing out the optical axis of image capture device, then target object is carried out
Imaging.Under the good weather of the most negligible atmospheric turbulance, owing to optical system and the image capture device of two light paths are equal
Unanimously, if ensureing, target is identical away from the object distance with target object, then it is believed that the PSF of target image and target object image
PSF is identical, by measuring the PSF of target image, can obtain the PSF of target image.
Lighting source, target, imaging device composition target simulator, can by regulation target and imaging device between away from
Infinite as far as in-plant target from carrying out continuous simulation, arranging position, infinity is target zero-bit, moves i.e. near object lens direction
Limited remote target can be emulated, thus realize simulating the target object under different shooting distance.
It is not strict linear spatially invariant system that optical system is affected by factors such as aberrations, and the PSF of system can be with
The change of visual field and change, for solving the measurement of spatial variations point spread function, the image recovery method that the present embodiment provides
In, it is preferable that target image uses black and white panel, and visual field is divided into some regions, and each region blade method is measured PSF,
Recycling cubic Hamiltonian symmetrical systems processes, it is thus achieved that the PSF of view picture target image spatial variations, finally using this PSF as just
Beginning parameter, uses Wiener filtering to deconvolute target image and obtains restored image.
Further, the image recovery method provided in the present embodiment, measure in real time respectively based on image restoration imaging system
Target object image under object distance, and the point spread function of the target object image obtained, it is possible to reflect image timely and accurately
The optics of collecting device, sampling etc. are fuzzy, and then make compared with the software of image restoration afterwards used in prior art, this
The image recovery method that bright embodiment provides, it is possible to making restored image closer to legitimate reading, recovery effect is more preferable.
It addition, the image recovery method that the application provides can solve the contradiction of the depth of field and resolution to a certain extent.
In certain applications such as optical detections, it is desirable to realize big field depth total focus imaging, use of prior art reduces optics more
Bore or the method for multi-focusing image synthesis, to sacrifice limiting resolution and certainly will improve cost as cost, and the application
There is provided image recovery method by PSF deconvolution method, diffraction limit broad image can be restored, simpler efficiently.
Further, image restoration imaging system simple in construction provided herein, with low cost, it is only necessary to pass through
Change the anglec of rotation of plane mirror, target object imaging optical path and the switching of target imaging optical path, and target can be realized
Simulator has only to finely tune the position of target and can be achieved with the target simulator under different object distances, it is possible to obtain in real time target image and
Target object image, and then improve the accuracy of the point spread function of the target object image of acquisition.
It should be noted that each embodiment in this specification all uses the mode gone forward one by one to describe, each embodiment weight
Point explanation is all the difference with other embodiments, and between each embodiment, identical similar part sees mutually.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.
Multiple amendment to these embodiments will be apparent from for those skilled in the art, as defined herein
General Principle can realize without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein and features of novelty phase one
The widest scope caused.
Claims (9)
1. an image restoration imaging system, it is characterised in that including:
Image capture device (7), diastimeter (6), rotation mirror holder (2), plane mirror (1), target simulator and processor
(8)；
Described target simulator includes imaging device (3) and target (4), and the dead-center position of described target (4) is positioned at described imaging
The focal position of device (3), described imaging device (3) is for pooling picture by described target；
Described plane mirror (1) is arranged on described rotation mirror holder (2), and described rotation mirror holder (2) is used for rotating described plane
Reflecting mirror (1), gathers the light path of image of described target object or gathers described target switching described image capture device (7)
(4) light path of image；
Described diastimeter (6) is for measuring the first distance, and described first distance gathers object for described image capture device (7)
Distance during body image, between described target object and described image capture device (7)；
The first distance that described processor (8) sends according to described diastimeter (6), is calculated second distance, described second away from
From the distance moved by described dead-center position for described target (4) so that after the mobile described second distance of described target (4), depend on
Secondary through described imaging device (3), described plane mirror (1) in described image capture device (7) simulation of imaging away from
From with described first apart from equal.
Image restoration imaging system the most according to claim 1, it is characterised in that described target simulator also includes illumination
Light source (9), described lighting source (9) is used for illuminating described target (4).
Image restoration imaging system the most according to claim 1, it is characterised in that also include translation stage (5), be used for carrying
And move described target (4).
Image restoration imaging system the most according to claim 1, it is characterised in that described target is that multiple black and white lattice are alternate
The black and white lattice target of arrangement.
Image restoration imaging system the most according to claim 1, it is characterised in that described target object is just to described image
Collecting device (7), and be positioned on the optical axis of described image capture device (7).
Image restoration imaging system the most according to claim 5, it is characterised in that the optical axis of described imaging device (3) with
The optical axis of described image capture device (7) is vertical.
7. an image restoration system, it is characterised in that include the image restoration imaging system described in claim 1-6 any one
System and image processing apparatus.
8. an image obtainment method, it is characterised in that described image obtainment method is based on described in claim 1-6 any one
Image restoration imaging system, described image restoration imaging system at least includes: image capture device, diastimeter, rotation mirror holder,
Plane mirror, imaging device, target and processor；
Described image obtainment method includes:
Rotate described plane mirror, make described image capture device gather the image of target object；
By described stadia surveying the first distance, described first distance is target object imaging in described image capture device
Time, the distance between described target object and described image capture device；
Sending described first distance to described processor, described processor is calculated second distance, and described second distance is
The distance that described target is moved by dead-center position；
Mobile described target second distance；
Rotate described plane mirror, make described image capture device gather the image of described target.
9. an image recovery method, it is characterised in that the object obtained based on the image obtainment method described in claim 8
Body image and target image, described image recovery method, including:
Described target image is divided into multiple region；
Calculate the point spread function that each region is corresponding respectively；
Regional point spread function is carried out interpolation processing, it is thus achieved that the point of described target image in described target image full filed
Spread function data；
Target object image deconvoluted meter according to the point spread function data in the described target image full filed obtained
Calculate, it is thus achieved that restored image.
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