CN108693642A - The determination method and apparatus of optical imaging system image quality - Google Patents
The determination method and apparatus of optical imaging system image quality Download PDFInfo
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- CN108693642A CN108693642A CN201710227473.9A CN201710227473A CN108693642A CN 108693642 A CN108693642 A CN 108693642A CN 201710227473 A CN201710227473 A CN 201710227473A CN 108693642 A CN108693642 A CN 108693642A
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- 238000012634 optical imaging Methods 0.000 title claims abstract description 176
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- 238000012546 transfer Methods 0.000 claims description 52
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- 238000003384 imaging method Methods 0.000 claims description 19
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/0012—Optical design, e.g. procedures, algorithms, optimisation routines
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Abstract
The invention discloses a kind of determination method and apparatus of optical imaging system image quality.Wherein, this method includes:Determine light transmission rate when each light is across thickness different air in the different light of multi-wavelength;Light transmission rate when in conjunction with each light across the different air of thickness determines the influence for the image quality that air thickness is imaged each light in optical imaging systems.The present invention solves the relatively low technical problem of method accuracy rate of the image quality of evaluation optical imaging system in the related technology.
Description
Technical field
The present invention relates to quality of optical imaging to evaluate field, in particular to a kind of optical imaging system image quality
Determination method and apparatus.
Background technology
Optical imaging system can be divided into multiple types, wherein according to optical imaging system according to the difference of application environment
System mounted can be divided into the optical imaging system of near-earth space of planes, the optics suitable for satellite remote sensing at a distance from ground
Imaging system etc..For the type selecting of the optical imaging system of near-earth space of planes, for example, carrying light in system platforms such as O-E Payloads
When learning imaging system (optics and the electronic module such as including CCD), type selecting is mostly by virtue of experience chosen, or using high-performance as possible
Optical imaging system.The first selection method is to have continued experience, but judge optical imagery system in more complex terrestrial space
The image quality of system can not provide that an individual character is energetic to be considered;Second method is then pursuing high performance camera lens and good
There can be cost spilling when CCD, optical imaging system may not be needed just can be using so good camera lens and CCD
Certain collocation is lower to realize preferable optical imagery performance, only can lead to unnecessary cost wave using high-performance as the reference of type selecting
Take.
Therefore, in order to which the type selecting to optical imaging system is better achieved, the image quality to optical imaging system is needed
It is evaluated.In the prior art, certain methods are had existed to the image quality of optical imaging system, but is answered in more complex
With under environment, such as when near-earth space of planes realizes the wide-long shot to ground, current evaluation of imaging quality method can not
Accurately estimation optical imaging system is to the imaging capability of terrestrial information, needs a kind of evaluation method of image quality more accurately
Evaluate the image quality of optical imaging system.
For the relatively low technical problem of the method accuracy rate of the image quality of evaluation optical imaging system in the related technology, mesh
It is preceding not yet to propose effective solution scheme.
Invention content
An embodiment of the present invention provides a kind of determination method and apparatus of optical imaging system image quality, at least to solve
The relatively low technical problem of the method accuracy rate of the image quality of evaluation optical imaging system in the related technology.
One side according to the ... of the embodiment of the present invention provides a kind of determination method of optical imaging system image quality,
This method includes:Determine light transmission rate when each light is across thickness different air in the different light of multi-wavelength;In conjunction with every
Kind light passes through light transmission rate when the different air of thickness to determine what air thickness was imaged each light in optical imaging systems
The influence of image quality.
Further, optical imaging system includes the photosensitive-member for converting optical signals to electric signal, in conjunction with each
Light pass through light transmission rate when the different air of thickness determine air thickness to each light be imaged in optical imaging systems at
The influence of image quality amount includes:Obtain light receiving efficiency of the photosensitive-member to each light, wherein light receiving efficiency is for indicating photosensitive-member
The optical signal of corresponding wavelength is converted to the transfer efficiency of electric signal;Based on the photosensitive-member of acquisition to the light receiving efficiency of each light
Calculate the light receiving efficiency of the photosensitive-member under different air thickness, different wavelength.
Further, optical imaging system further includes camera lens, based on the photosensitive-member of acquisition to the light receiving efficiency of each light
Calculating the light receiving efficiency of photosensitive-member under different air thickness, different wavelength includes:Letter is transmitted in the modulation for obtaining camera lens
Number curve;Modulation transfer function curve based on camera lens calculates the optical imagery system under different air thickness, different wavelength
The modulation transfer function distribution situation of system.
Further, it is calculated in different air thickness, different wavelength in the modulation transfer function curve based on camera lens
After the modulation transfer function distribution situation of lower optical imaging system, this method further includes:Determine the application of optical imaging system
Demand of the environment to the image quality of optical imaging system;Judging the image contrast of the optical imaging system under application environment is
No meet demand;If it is judged that being no, then the camera lens and/or photosensitive-member of optical imaging system are reselected, until meter
The image contrast of the optical imaging system of calculating meet demand under application environment.
Further, the modulation transfer function curve based on camera lens calculates under different air thickness, different wavelength
The modulation transfer function distribution situation of optical imaging system includes:By simulation software calculate air thickness, wavelength and optics at
As the modulating transfer function value of system relational expression and draw the graphics of relational expression.
Further, optical imaging system is the optical imaging system applied in terrestrial space, is combining each wavelength
Light pass through light transmission rate when the different air of thickness determine influence of the air thickness to the image quality of optical imaging system it
Afterwards, this method further includes:Determine height where optical imaging system and thick with the shooting direction of optical imaging system and air
The relationship of degree;Determine height where optical imaging system and with the shooting direction of optical imaging system to optical imaging system
The influence of image quality.
Another aspect according to the ... of the embodiment of the present invention additionally provides a kind of determining dress of optical imaging system image quality
It sets, which includes:First determination unit, the air that each light passes through thickness different in the light different for determining multi-wavelength
When light transmission rate;Second determination unit, light transmission rate when for combining each light to pass through the different air of thickness determine empty
The influence for the image quality that gas thickness is imaged each light in optical imaging systems.
Further, optical imaging system includes the photosensitive-member for converting optical signals to electric signal, and second determines
Unit includes:Acquisition module, for obtaining light receiving efficiency of the photosensitive-member to each light, wherein light receiving efficiency is felt for indicating
The optical signal of corresponding wavelength is converted to the transfer efficiency of electric signal by light component;Computing module is used for the photographic department based on acquisition
Part calculates the light receiving efficiency of each light the light receiving efficiency of the photosensitive-member under different air thickness, different wavelength.
Further, optical imaging system further includes camera lens, and computing module includes:Acquisition submodule, for obtaining camera lens
Modulation transfer function curve;Computational submodule is calculated for the modulation transfer function curve based on camera lens in different air
The modulation transfer function distribution situation of optical imaging system under thickness, different wavelength.
Further, which further includes:Third determination unit, based in the modulation transfer function curve based on camera lens
Calculation after the modulation transfer function distribution situation of optical imaging system, determines light under different air thickness, different wavelength
Study the demand to the image quality of optical imaging system as systematic difference environment;Judging unit, for judging using ring
Under border the image contrast of optical imaging system whether meet demand;Execution unit, be used for if it is judged that be it is no, then again
The camera lens and/or photosensitive-member of optical imaging system are selected, until the image contrast of calculated optical imaging system is being answered
With meet demand under environment.
Further, computational submodule is additionally operable to calculate air thickness, wavelength and optical imaging system by simulation software
Modulating transfer function value relational expression and draw the graphics of relational expression.
Further, optical imaging system is the optical imaging system applied in terrestrial space, which further includes:4th
Determination unit, for passing through light transmission rate when the different air of thickness to determine air thickness to light in the light for combining each wavelength
After the influence for learning the image quality of imaging system, the height where optical imaging system and the bat with optical imaging system are determined
Take the photograph the relationship in direction and air thickness;5th determination unit, for determine height where optical imaging system and with optics at
As influence of the shooting direction to the image quality of optical imaging system of system.
Another aspect according to the ... of the embodiment of the present invention additionally provides a kind of storage medium, which includes storage
Program, wherein equipment executes the optical imaging system image quality of the present invention where controlling storage medium when program is run
Determine method.
Another aspect according to the ... of the embodiment of the present invention additionally provides a kind of processor, which is used to run program,
In, the determination method of the optical imaging system image quality of the present invention is executed when program is run.
In embodiments of the present invention, when each light passes through thickness different air in the light different by determining multi-wavelength
Light transmission rate, pass through light transmission rate when the different air of thickness to determine air thickness to each light in optics in conjunction with each light
The influence for the image quality being imaged in imaging system solves the side of the image quality of evaluation optical imaging system in the related technology
The relatively low technical problem of method accuracy rate, and then realize the technology effect of the more accurately image quality of evaluation optical imaging system
Fruit.
Description of the drawings
Attached drawing described herein is used to provide further understanding of the present invention, and is constituted part of this application, this hair
Bright illustrative embodiments and their description are not constituted improper limitations of the present invention for explaining the present invention.In the accompanying drawings:
Fig. 1 is a kind of flow of the determination method of optional optical imaging system image quality according to the ... of the embodiment of the present invention
Figure;
Fig. 2 is a kind of principle of the determination method of optional optical imaging system image quality according to the ... of the embodiment of the present invention
Schematic diagram;
Fig. 3 is the relation curve schematic diagram of a kind of optional air thickness and light transmission rate according to the ... of the embodiment of the present invention;
Fig. 4 is a kind of optional photosensitive quantum efficiency curve schematic diagrames of CCD according to the ... of the embodiment of the present invention;
Fig. 5 is a kind of modulation transfer function curve synoptic diagram of optional camera lens according to the ... of the embodiment of the present invention;
Fig. 6 is a kind of signal of the determining device of optional optical imaging system image quality according to the ... of the embodiment of the present invention
Figure.
Specific implementation mode
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The every other embodiment that member is obtained without making creative work should all belong to the model that the present invention protects
It encloses.
It should be noted that term " first " in description and claims of this specification and above-mentioned attached drawing, "
Two " etc. be for distinguishing similar object, without being used to describe specific sequence or precedence.It should be appreciated that using in this way
Data can be interchanged in the appropriate case, so as to the embodiment of the present invention described herein can in addition to illustrating herein or
Sequence other than those of description is implemented.In addition, term " comprising " and " having " and their any deformation, it is intended that cover
It includes to be not necessarily limited to for example, containing the process of series of steps or unit, method, system, product or equipment to cover non-exclusive
Those of clearly list step or unit, but may include not listing clearly or for these processes, method, product
Or the other steps or unit that equipment is intrinsic.
This application provides a kind of embodiments of the determination method of optical imaging system image quality.Light provided by the invention
It learns imaging system images matter method for determination of amount and can be applied to a variety of optical imaging systems, for example, applying in terrestrial space
Optical imaging system for shooting terrestrial information.
Fig. 1 is a kind of flow of the determination method of optional optical imaging system image quality according to the ... of the embodiment of the present invention
Figure, as shown in Figure 1, this method comprises the following steps:
Step S101 determines light transmission rate when each light is across thickness different air in the different light of multi-wavelength.
Air there is disperse function, light can decline in the intensity of the light after air, can use up the propagation of light
Rate is crossed to indicate light in the Strength Changes after the different air of thickness.And if the wavelength of light is different, passing through phase
The degree that intensity after the air of stack pile declines also differs, therefore, can determine respectively the light of different wave length across
Light percent of pass after air, that is, determining light when each light is across thickness different air in the different light of multi-wavelength
Transmitance.
Step S102 passes through light transmission rate when the different air of thickness to determine air thickness to each light in conjunction with each light
The influence for the image quality being imaged in optical imaging systems.
After light transmission rate when each light in determining the different light of multi-wavelength passes through the different air of thickness, in conjunction with
Each light passes through the variation of light transmission rate when the different air of thickness to determine air thickness to the light of each wavelength at image quality
The influence of amount.The influence can indicate that the formula of specific index can be according to optical imagery system with an index parameter
The demand of the image quality of system determines.For example, if the image contrast to optical imaging system has demand, it can be in conjunction with every
Kind light passes through light transmission rate when the different air of thickness to calculate optical imaging system when on the different air of thickness
Image contrast determines influence of the air thickness to image quality according to the size variation of image contrast.Alternatively, can also use
Evaluation index parameter of other index parameters as image quality, for example, modulation transfer function (Modulation
Transfer Function, abbreviation MTF), resolution ratio, clarity etc., the embodiment of the present invention is not construed as limiting this, as long as this is commented
Valence index parameter can indicate at least one aspect of optical imaging system image quality.
Each light passes through light when the different air of thickness to penetrate in the embodiment light different by determining multi-wavelength
Rate passes through light transmission rate when the different air of thickness to determine air thickness to each light in optical imaging system in conjunction with each light
The influence of the image quality of middle imaging, the embodiment provide image quality determination method in view of air thickness to optics at
As the influence of the image quality of system, solves the method accuracy rate of the image quality of evaluation optical imaging system in the related technology
Relatively low technical problem, and then realize the technique effect of the more accurately image quality of evaluation optical imaging system.Further
Ground, the method which provides may be used the evaluation that the means of emulation quantify image quality, can instruct to light
The type selecting for learning imaging system reduces optics as much as possible making optical imaging system under the premise of reaching image quality and requiring
The cost of each image-forming block in imaging system, avoids the cost allowance caused by type selecting is improper.
The optical imaging system of above-described embodiment application may include the photographic department for converting optical signals to electric signal
Part passes through light when the different air of thickness to penetrate as a kind of preferred embodiment of above-described embodiment combining each light
When rate determines the influence for the image quality that air thickness is imaged each light in optical imaging systems, photographic department can be first obtained
Light receiving efficiency of the part to each light, wherein light receiving efficiency is for indicating that the optical signal of corresponding wavelength is converted to electricity by photosensitive-member
The transfer efficiency of signal, then the light receiving efficiency of each light is calculated in different air thickness, no based on the photosensitive-member of acquisition
The light receiving efficiency of photosensitive-member under same wavelength.
Further, optical imaging system can also include camera lens, in sense of the photosensitive-member based on acquisition to each light
Light efficiency calculating when the light receiving efficiency of photosensitive-member, can obtain the tune of camera lens under different air thickness, different wavelength
Modulation trnasfer function curve (MTF curve), and then the modulation transfer function curve based on camera lens is calculated in different air thickness, no
The modulation transfer function distribution situation of optical imaging system under same wavelength.
The optical imagery under different air thickness, different wavelength is calculated in the modulation transfer function curve based on camera lens
After the modulation transfer function distribution situation of system, whether can also meet optical imaging system according to the result of image contrast
Demand of the application environment to image quality is to determine whether need to carry out type selecting to the component in optical imaging system again.Specifically
The step of ground, deterministic process may include:Determine image quality of the application environment to optical imaging system of optical imaging system
Demand;Judge the optical imaging system under application environment image contrast whether meet demand;If it is judged that be it is no,
The camera lens and/or photosensitive-member of optical imaging system are then reselected, until the imaging contrast of calculated optical imaging system
Degree meet demand under application environment.
Above-mentioned calculating process can be calculated by simulation software, in the modulation transfer function curve meter based on camera lens
It can be logical when the modulation transfer function distribution situation of optical imaging system to calculate under different air thickness, different wavelength
It crosses the relational expression of the modulating transfer function value of simulation software calculating air thickness, wavelength and optical imaging system and draws relational expression
Graphics.
Optionally, the optical imagery system that the determination method for the optical imaging system image quality which provides is applied
System can be the optical imaging system applied in terrestrial space, for example, optical remote sensing system, the optical imaging system of terrestrial space
It is the optical imaging system for being operated in terrestrial space, can be mounted on the O-E Payloads platform such as terrestrial space aircraft, near-earth
The optical imaging system in space can shoot the information on ground, therefore, in the imaging of the optical imaging system of evaluation terrestrial space
The air thickness passed through in view of optical imaging system is needed when quality.Under this application environment, each wavelength is being combined
Light pass through light transmission rate when the different air of thickness determine influence of the air thickness to the image quality of optical imaging system it
Afterwards, the height where optical imaging system and the pass with the shooting direction of optical imaging system and air thickness can also be determined
System, based on height and shooting direction and air thickness where optical imaging system relationship determine optical imaging system where
Height and influence with the shooting direction of optical imaging system to the image quality of optical imaging system.
The step of with reference to a kind of specific embodiment to the determination method of above-mentioned optical imaging system image quality into
Row detailed description:
In order to instruct the type selecting of the optical imaging system to carrying on terrestrial space aircraft, need quantitatively to learn in advance
Optical imaging system obtains the ability of terrestrial information on terrestrial space aircraft, and the embodiment is by the method for emulation to a set of
The image quality of specific optical imaging system carries out quantitatively evaluating, if meeting the requirement of image quality, type selecting success, such as
Fruit does not meet, then type selecting fails, and redefines a set of optical imaging system and carries out evaluation of imaging quality, until type selecting success.
The process of the determination method for the optical imaging system image quality that the embodiment provides is as shown in Figure 2, it is first determined
Then the influence of the atmospheric attenuation factor and the quantum efficiency of CCD to modulation transfer function of optical system MTF determines picture clarity
The case where distribution.
First, the curve for determining the atmospheric attenuation factor obtains under some preset wavelength with air thickness change light transmission rate
The trend curve of variation is as shown in Figure 3.
Secondly, a CCD (photosensitive-member) is chosen, determines the quantum efficiency of the CCD, quantum efficiency namely quantum conversion effect
Rate, for indicating that CCD converts optical signals to the transfer efficiency of electric signal, quantum efficiency curve synoptic diagram such as Fig. 4 institutes of the CCD
Show.
Finally, the MTF curve of camera lens is obtained, Fig. 5 is the schematic diagram of the MTF curve of Nikon 18-200mm zoom lens,
This MTF curve indicates the relation curve between the picture point and image field center distance and mtf value of camera lens, each curve in Fig. 5
Respectively represent the MTF curve to different space frequency (unit lp/mm) on different image planes (sagittal surface and meridian plane).Wherein, false
The fixed MTF curve is the result actually measured.
After the MTF curve for determining the above-mentioned curve of the atmospheric attenuation factor, the quantum efficiency of CCD and camera lens, utilize
CCD is to the conversion quantum efficiency of the preset wavelength and as air thickness change leads to the pass that the transmitance of the preset wavelength changes
System, does algorithm operation, to determine optical imaging system high aerial phase under the preset wavelength and particular space frequency, specific image planes
The MTF overall distribution states of machine capturing visual.Specifically, air thickness can be determined and be drawn by simulation software (such as Matlab)
Graphics between degree (at a distance from ground), picture point and image field center distance and mtf value, the graphics can be reflected in imaging
The mtf value of different location in plane, and cover influence of the CCD quantum efficiencies to mtf value, wherein air thickness and picture point
It is independent variable with image field center distance, mtf value is dependent variable, and mtf value is for indicating relative intensity (or contrast, Relative
Intensity), wherein the graphics that MTF is distributed under different space frequency, different image planes and different preset wavelengths is different
's.
The determination method for the optical imaging system image quality that the embodiment provides is a kind of suitable for evaluation terrestrial space
The method of aircraft optical imagery system imaging clarity, it is empty by the more detailed description of the means of emulation and evaluation near-earth
Between aircraft carry optical imaging system image quality, optical imaging system in the air can intuitively be obtained ahead of time very much
The quantizating index of image quality.It, then can be more accurate if MTF curve is the distribution situation of optical imaging system in a dynamic state
The description clarity that optical imaging system is imaged under dynamic condition in the air.Wherein, static space transmit modulation function and
Modulation function is transmitted there are larger difference in dynamic space, which is the optical imagery system suitable for terrestrial space aircraft
System, and optical imaging system is in dynamical state under this working environment, obtaining for modulation function is transmitted in the space under dynamic condition
Must be always a more unobtainable data, it is related to the MTF distributions of the optical system under static state, when the TDI of CCD
Between and aircraft movement velocity, the multiple factors such as angular speed of posture and shaking, such polynary and randomness causes
Modulation function more difficult description is transmitted in space under dynamic condition, which is packaged into dynamic space modulation transfer function
Transmitting modulation function for lens space can avoid increasing the complexity of algorithm to carry out whole considering.In addition, optical imagery
The figure description that image formation state of the system on CCD can be also drawn, compares confining method of the tradition to minimum resolution cell, this
The tool of sample can more comprehensively react optical system state as means, have guidance meaning to choosing CCD and camera lens aspect
Justice.
It should be noted that attached drawing flow chart though it is shown that logical order, but in some cases, can be with
Shown or described step is executed different from sequence herein.
This application provides a kind of storage medium, which includes the program of storage, wherein runs time control in program
Equipment executes the determination method of the optical imaging system image quality of the embodiment of the present invention where storage medium processed.
This application provides a kind of processor, the processor is for running program, wherein program executes the present invention when running
The determination method of the optical imaging system image quality of embodiment.
Present invention also provides a kind of embodiments of the determining device of optical imaging system image quality.
Fig. 6 is a kind of signal of the determining device of optional optical imaging system image quality according to the ... of the embodiment of the present invention
Figure, as shown in fig. 6, the device includes the first determination unit 10 and the second determination unit 20.
First determination unit is used to determine light when each light is across thickness different air in the different light of multi-wavelength
Transmitance.Light transmission rate when second determination unit is used to combine each light to pass through thickness different air determines air thickness pair
The influence for the image quality that each light is imaged in optical imaging systems.
Optionally, optical imaging system includes the photosensitive-member for converting optical signals to electric signal, and second determines list
Member includes:Acquisition module, for obtaining light receiving efficiency of the photosensitive-member to each light, wherein light receiving efficiency is for indicating photosensitive
The optical signal of corresponding wavelength is converted to the transfer efficiency of electric signal by component;Computing module is used for the photosensitive-member based on acquisition
The light receiving efficiency of the photosensitive-member under different air thickness, different wavelength is calculated the light receiving efficiency of each light.
Optionally, optical imaging system further includes camera lens, and computing module includes:Acquisition submodule, for obtaining camera lens
Modulation transfer function curve;Computational submodule calculates thick in different air for the modulation transfer function curve based on camera lens
The modulation transfer function distribution situation of optical imaging system under degree, different wavelength.
Optionally, which further includes:Third determination unit, for being calculated in the modulation transfer function curve based on camera lens
Under different air thickness, different wavelength after the modulation transfer function distribution situation of optical imaging system, optics is determined
Demand of the application environment of imaging system to the image quality of optical imaging system;Judging unit, for judging in application environment
The image contrast of lower optical imaging system whether meet demand;Execution unit is used to if it is judged that be no, then select again
The camera lens and/or photosensitive-member of optical imaging system are selected, until the image contrast of calculated optical imaging system is being applied
Meet demand under environment.
Optionally, computational submodule is additionally operable to calculate air thickness, wavelength and optical imaging system by simulation software
The relational expression of modulating transfer function value and the graphics for drawing relational expression.
Optionally, optical imaging system is the optical imaging system applied in terrestrial space, which further includes:4th really
Order member, for passing through light transmission rate when the different air of thickness to determine air thickness to optics in the light for combining each wavelength
After the influence of the image quality of imaging system, the height where optical imaging system and the shooting with optical imaging system are determined
The relationship in direction and air thickness;5th determination unit, for determining height and and optical imagery where optical imaging system
Influence of the shooting direction of system to the image quality of optical imaging system.
Above-mentioned device may include processor and memory, and said units can be stored in storage as program unit
In device, above procedure unit stored in memory is executed by processor to realize corresponding function.
Memory may include computer-readable medium in volatile memory, random access memory (RAM) and/
Or the forms such as Nonvolatile memory, if read-only memory (ROM) or flash memory (flash RAM), memory include at least one deposit
Store up chip.
The sequence of above-mentioned the embodiment of the present application can not represent the quality of embodiment.
In above-described embodiment of the application, all emphasizes particularly on different fields to the description of each embodiment, do not have in some embodiment
The part of detailed description may refer to the associated description of other embodiment.In several embodiments provided herein, it should be appreciated that
It arrives, disclosed technology contents can be realized by another way.
Wherein, the apparatus embodiments described above are merely exemplary, for example, the unit division, can be one
Kind of division of logic function, formula that in actual implementation, there may be another division manner, such as 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, it is shown or discussed it is mutual it
Between coupling, direct-coupling or communication connection can be INDIRECT COUPLING or communication link by some interfaces, unit or module
It connects, can be electrical or other forms.
In addition, each functional unit in each embodiment of the application 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.Above-mentioned integrated list
The form that hardware had both may be used in member is realized, can also be realized in the form of SFU software functional unit.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can be stored in a computer read/write memory medium.Based on this understanding, the technical solution of the application is substantially
The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words
It embodies, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can be personal computer, server or network equipment etc.) execute each embodiment the method for the application whole or
Part steps.And storage medium above-mentioned includes:USB flash disk, read-only memory (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), mobile hard disk, magnetic disc or CD etc. are various can to store program code
Medium.
The above is only the preferred embodiment of the application, it is noted that for the ordinary skill people of the art
For member, under the premise of not departing from the application principle, several improvements and modifications can also be made, these improvements and modifications are also answered
It is considered as the protection domain of the application.
Claims (14)
1. a kind of determination method of optical imaging system image quality, which is characterized in that including:
Determine light transmission rate when each light is across thickness different air in the different light of multi-wavelength;
Light transmission rate when the different air of thickness is passed through to determine air thickness to each light in optical imagery system in conjunction with each light
The influence for the image quality being imaged in system.
2. according to the method described in claim 1, it is characterized in that, the optical imaging system includes for converting optical signal
For the photosensitive-member of electric signal, light transmission rate when the different air of thickness is passed through to determine air thickness to each in conjunction with each light
The influence for the image quality that light is imaged in optical imaging systems includes:
Obtain light receiving efficiency of the photosensitive-member to each light, wherein the light receiving efficiency is for indicating the photosensitive-member
The optical signal of corresponding wavelength is converted to the transfer efficiency of the electric signal;
The photosensitive-member based on acquisition calculates under different air thickness, different wavelength the light receiving efficiency of each light
The light receiving efficiency of the photosensitive-member.
3. according to the method described in claim 2, it is characterized in that, the optical imaging system further includes camera lens, based on acquisition
The photosensitive-member photosensitive-member under different air thickness, different wavelength is calculated to the light receiving efficiency of each light
Light receiving efficiency include:
Obtain the modulation transfer function curve of the camera lens;
Modulation transfer function curve based on the camera lens calculate under different air thickness, different wavelength the optics at
As the modulation transfer function distribution situation of system.
4. according to the method described in claim 3, it is characterized in that, being calculated in the modulation transfer function curve based on the camera lens
It is described under different air thickness, different wavelength after the modulation transfer function distribution situation of the optical imaging system
Method further includes:
Determine the demand of the application environment of the optical imaging system to the image quality of the optical imaging system;
Judge whether the image contrast of the optical imaging system under the application environment meets the demand;
If it is judged that being no, then the camera lens and/or photosensitive-member of the optical imaging system are reselected, until calculating
The image contrast of the optical imaging system meet the demand under the application environment.
5. according to the method described in claim 3, it is characterized in that, the modulation transfer function curve based on the camera lens calculates
The modulation transfer function distribution situation of the optical imaging system includes under different air thickness, different wavelength:
The relational expression of the modulating transfer function value of air thickness, wavelength and the optical imaging system is calculated by simulation software simultaneously
Draw the graphics of the relational expression.
6. according to the method described in claim 1, it is characterized in that, the optical imaging system is the light applied in terrestrial space
Imaging system is learned, passes through light transmission rate when the different air of thickness to determine air thickness to optics in the light for combining each wavelength
After the influence of the image quality of imaging system, the method further includes:
Determine height where the optical imaging system and with the shooting direction of the optical imaging system and air thickness
Relationship;
Determine height where the optical imaging system and with the shooting direction of the optical imaging system to the optics at
As the influence of the image quality of system.
7. a kind of determining device of optical imaging system image quality, which is characterized in that including:
First determination unit, each light passes through light when the different air of thickness to penetrate in the light different for determining multi-wavelength
Rate;
Second determination unit, light transmission rate when for combining each light to pass through the different air of thickness determine air thickness to every
The influence for the image quality that kind light is imaged in optical imaging systems.
8. device according to claim 7, which is characterized in that the optical imaging system includes for converting optical signal
For the photosensitive-member of electric signal, second determination unit includes:
Acquisition module, the light receiving efficiency for obtaining the photosensitive-member to each light, wherein the light receiving efficiency is for indicating
The optical signal of corresponding wavelength is converted to the transfer efficiency of the electric signal by the photosensitive-member;
Computing module calculates the light receiving efficiency of each light for the photosensitive-member based on acquisition thick in different air
The light receiving efficiency of the photosensitive-member under degree, different wavelength.
9. device according to claim 8, which is characterized in that the optical imaging system further includes camera lens, the calculating
Module includes:
Acquisition submodule, the modulation transfer function curve for obtaining the camera lens;
Computational submodule is calculated for the modulation transfer function curve based on the camera lens in different air thickness, different
The modulation transfer function distribution situation of the optical imaging system under wavelength.
10. device according to claim 9, which is characterized in that described device further includes:
Third determination unit, for being calculated in different air thickness, no in the modulation transfer function curve based on the camera lens
Under same wavelength after the modulation transfer function distribution situation of the optical imaging system, answering for the optical imaging system is determined
Demand with environment to the image quality of the optical imaging system;
Judging unit, for judging it is described whether the image contrast of the optical imaging system under the application environment meets
Demand;
Execution unit is used to if it is judged that be no, then reselect the camera lens and/or photographic department of the optical imaging system
Part, until the image contrast of the calculated optical imaging system meets the demand under the application environment.
11. device according to claim 9, which is characterized in that the computational submodule is additionally operable to through simulation software meter
It calculates the relational expression of the modulating transfer function value of air thickness, wavelength and the optical imaging system and draws the three of the relational expression
Dimension figure.
12. device according to claim 7, which is characterized in that the optical imaging system is to apply in terrestrial space
Optical imaging system, described device further include:
4th determination unit, for passing through light transmission rate when the different air of thickness to determine air in the light for combining each wavelength
After influence of the thickness to the image quality of optical imaging system, determine height where the optical imaging system and with it is described
The relationship of the shooting direction and air thickness of optical imaging system;
5th determination unit, for determining the height where the optical imaging system and the shooting with the optical imaging system
Influence of the direction to the image quality of the optical imaging system.
13. a kind of storage medium, which is characterized in that the storage medium includes the program of storage, wherein run in described program
When control the storage medium where equipment perform claim require the optical imaging system described in any one of 1 to 6 at image quality
Method for determination of amount.
14. a kind of processor, which is characterized in that the processor is for running program, wherein right of execution when described program is run
Profit requires the determination method of the optical imaging system image quality described in any one of 1 to 6.
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| US20210209741A1 (en) * | 2020-01-07 | 2021-07-08 | Pegatron Corporation | Light guide image processing method and apparatus |
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