CN104122078B - Evaluation method for image quality of near-to-eye display optical lens - Google Patents
Evaluation method for image quality of near-to-eye display optical lens Download PDFInfo
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Abstract
The invention discloses an evaluation method of image quality of a near-to-eye display optical lens, which is suitable for rapid detection in commercial production. The method comprises the steps of enabling a sample lens with known performance parameters to be observed by an experimenter, extracting a group of physical parameters sensitive to the visual perception of human eyes in a statistical mode, quantizing the physical parameters to obtain a parameter interval corresponding to the image quality which can be received by the human eyes, and taking the parameter interval as a standard of subjective evaluation. The fast inspection system with established connection can accurately and fast evaluate the image quality of the optical system by taking subjective evaluation as a standard according to the detected lens parameters. The technical scheme of the invention can quickly and accurately evaluate the imaging quality or the performance of the optical lens, and is very convenient to use.
Description
Technical field
The present invention relates to nearly eye show, optical lens detects and the technical field such as image quality evaluation, more particularly, to a kind of nearly eye
Display optical lens is as the evaluation method of matter.
Background technology
In the last few years, with the development of micro-display, advanced optics and software and hardware technology, nearly eye display gas producing formation goes out not
Thoroughly, it is also more extensive in the application in the fields such as amusement, virtual reality.The display effect of device is closely related with optical lens,
It is very crucial therefore for the image quality evaluation of optical lens.
Although for the design of near-to-eye part and the existing in-depth study of application, at it as quality detection and evaluation method
Aspect but relatively lags behind.Though existing have some objective detections or subjective evaluation method, the former complex operation it is impossible to quick detection, and
And it is not bound with the visual experience of human eye；Although subjective assessment is intuitively accurate, high to evaluating environmental requirement, and with subjective experience
As evaluation criterion, therefore both cannot be applied in the detection in commodity production.
Content of the invention
In order to solve disadvantages mentioned above, the present invention provides a kind of evaluation nearly eye display optical lens as the method for matter, applies this
Method can quickly and accurately evaluate the image quality of optical lens or the quality of its performance.
The technical solution adopted in the present invention is: a kind of nearly eye display optical lens is as the evaluation method of matter, comprising:
By various objective measurement instruments, optical lens to be evaluated is measured, obtain objective physical parameter value；
The different brackets obtaining described optical lens to be evaluated is as the corresponding physical parameter value of matter；Described different brackets picture
The corresponding physical parameter value of matter counts for subjective assessment；And carry from described different brackets is as the corresponding physical parameter value of matter
Take out the physical parameter value maximum on the subjective feeling impact of human eye vision；To the described physical parameter value amount of carrying out extracted
Change, the corresponding parameter of picture matter obtaining human eye acceptance is interval, as the physical parameter value of subjective assessment；
Nearly eye display optical system is detected as the evaluating apparatus of matter carry out detection to described optical lens to be evaluated
Physical parameter value；
Described nearly eye display optical system sets up the physical parameter value of described detection and described objective as the evaluating apparatus of matter
Physical parameter value between corresponding relation；
Described nearly eye display optical system is as the evaluating apparatus of matter are using the physical parameter value of described subjective assessment as input
Evaluation criterion, according to optical lens to be measured detection physical parameter value and described corresponding relation, to described detection
Physical parameter value is evaluated.
In method as above, described nearly eye display optical system includes as the evaluating apparatus of matter: for showing standard
The micro display screen (1) of test board, optical lens (2) to be evaluated, the ccd camera for imaging, the image of collection image
Capture card (5), for showing and analyzing and processing the computer (6) of image；A described ccd camera includes camera lens (3) and target surface
(4)；
Described nearly eye display optical system as matter evaluating apparatus by the physical parameter value of described detection and described objectively
Physical parameter value is contrasted and is revised, and sets up relation between the two, specifically includes:
The physical parameter value of described detection and described objective physical parameter value are contrasted and are revised by described computer,
And be according to repeatedly debugging the algorithm that described computer adopts so that the physical parameter value of described detection tends to close to institute with the latter
State objective physical parameter value, and obtain relation between the two.
In method as above, nearly eye display optical system is as the evaluating apparatus of matter are to described optical lens to be evaluated
Carry out detecting the physical parameter value obtaining detecting, specifically include:
The standard test panel that described micro display screen (1) display manufactures, outgoing after described optical lens (2) to be evaluated is put down
Row light, then after a described ccd camera picked-up, described image capture card (5) collection image is finally shown in described calculating
On machine (6)；Treatment Analysis are carried out to acquired image by the software algorithm on described computer (6), obtains described detection
Physical parameter value.
In method as above, described, the described physical parameter value extracted is quantified, obtain human eye and accept
The corresponding parameter of picture matter interval, after the physical parameter value of subjective assessment, described nearly eye display optical system is as matter
Before evaluating apparatus carry out to described optical lens to be evaluated detecting the physical parameter value obtaining detecting, also include:
Described camera lens (3) to a described ccd camera and described target surface (4), described micro display screen (1) are carried out at calibration
Reason is so that the performance of the only described optical lens (2) to be evaluated of obtained physical parameter expression.
In method as above, set up between the physical parameter value of described detection and described objective physical parameter value
Corresponding relation, specifically includes: the physical parameter value of described detection and described objective physical parameter value contrasted and revised,
Described nearly eye display optical system is debugged as the evaluating apparatus of matter are to change described inspection as standard and judgment using the latter's parameter value
Survey physical parameter value so that described nearly eye display optical system as matter evaluating apparatus detection described detection physical parameter
Value is close to described objective physical parameter value, and sets up described corresponding relation.
In method as above, described performance parameter include the angle of visual field, distortion, resolution ratio, contrast, mtf value and
At least one of color saturation.
Compared with prior art, it is an advantage of the current invention that: by adopting technique scheme, both combined the master of human eye
Perception is subject to again and objective measurement establishes contact, the result of therefore final evaluation accurately and reliably it is most important that with the regarding of human eye
Feel that the result that impression evaluates is consistent.And technical scheme is according to formed by the standard testing version that micro-display manifests
As once one or more physical quantity such as the angle of visual field, distortion, resolution ratio, contrast, mtf, color saturation can be measured,
Reach the effect of quick detection.And technical scheme is high to evaluating environmental requirement, and using subjective experience as evaluation
Standard, may apply in the detection in commodity production, and can quickly and accurately evaluate the image quality of optical lens
Or the quality of its performance, very easy to use.
Brief description:
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
Have technology description in required use accompanying drawing be briefly described it should be apparent that, drawings in the following description are these
Some bright embodiments, for those of ordinary skill in the art, without having to pay creative labor, acceptable
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is nearly eye display optical lens provided in an embodiment of the present invention as the flow chart of the evaluation method of matter.
Fig. 2 is nearly eye display optical system provided in an embodiment of the present invention as the schematic diagram of the evaluating apparatus of matter.
Fig. 3 is on the axle measure in the embodiment of the present invention optical lens to be evaluated and the test mode figure of axle external characteristics.
Fig. 4 is the instrumentation plan of mtf value provided in an embodiment of the present invention.
Fig. 5 is the instrumentation plan of distortion provided in an embodiment of the present invention.
Fig. 6 is the instrumentation plan of the angle of visual field provided in an embodiment of the present invention.
Specific embodiment:
Purpose, technical scheme and advantage for making the embodiment of the present invention are clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described it is clear that described embodiment is
The a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment being obtained under the premise of not making creative work, broadly falls into the scope of protection of the invention.
Fig. 1 is nearly eye display optical lens provided in an embodiment of the present invention as the flow chart of the evaluation method of matter.As Fig. 1 institute
Show, the nearly eye display optical lens of the present embodiment, as the evaluation method of matter, specifically may include steps of:
100th, by various objective measurement instruments, optical lens to be evaluated is measured, obtain objective physical parameter
Value；
For example, the performance parameter in the present embodiment includes the angle of visual field, distortion, resolution ratio, contrast, modulation transfer function
(modulation transfer function；Mtf) at least one of value and color saturation.Specifically, by each
Plant objective measurement apparatus measures optical lens to be evaluated to obtain each performance parameter, such as obtain mtf value by transfer function measuring instruments, pass through
Precision goniometer measurement obtains the physical parameters such as the angle of visual field, distortion, all markd performance ginseng of each optical lens to be evaluated
Numerical value.
101st, obtain the different brackets of optical lens to be evaluated as the corresponding physical parameter value of matter；And from different brackets picture
The physical parameter value maximum on the subjective feeling impact of human eye vision is extracted in the corresponding physical parameter value of matter；To extracted
Physical parameter value is quantified, and the corresponding parameter of picture matter obtaining human eye acceptance is interval, as the physical parameter value of subjective assessment；
In the present embodiment, different brackets counts for subjective assessment as the corresponding physical parameter value of matter；For example can be by
Optical lens to be evaluated puts into market or structure observation person carries out subjective assessment, thus count different brackets as matter corresponding
Physical parameter value.
102nd, nearly eye display optical system is detected as the evaluating apparatus of matter carry out detection to optical lens to be evaluated
Physical parameter value；
The present embodiment nearly eye display optical system adopts various optical elements and computer etc. as the evaluating apparatus of matter
Constitute.
103rd, nearly eye display optical system as matter evaluating apparatus set up detection physical parameter value and objective physics ginseng
Corresponding relation between numerical value；
For example can be by nearly eye display optical system as the physics that detection to be set up by the computer in the evaluating apparatus of matter is joined
Corresponding relation between numerical value and objective physical parameter value.
104th, nearly eye display optical system is as evaluating apparatus the commenting using the physical parameter value of subjective assessment as input of matter
Price card standard, the physical parameter value according to optical lens to be measured detection and corresponding relation, comment to the physical parameter value of detection
Valency.
The nearly eye display optical lens of the present embodiment, as the evaluation method of matter, by adopting technique scheme, both combined
The subjective feeling of human eye is again and objective measurement establishes contact, the result of therefore final evaluation accurately and reliably it is most important that
Consistent with the result that the visual experience of human eye evaluates.And the standard survey that technical scheme manifests according to micro-display
Test run imaging once can measure the angle of visual field, distortion, resolution ratio, contrast, mtf, color saturation etc. one or
Multiple physical quantitys, reach the effect of quick detection.And technical scheme is high to evaluating environmental requirement, and with subjective warp
Test as evaluation criterion, may apply in the detection in commodity production, and can quickly and accurately evaluate optical lens
Image quality or its performance quality, very easy to use.
Fig. 2 is nearly eye display optical system provided in an embodiment of the present invention as the schematic diagram of the evaluating apparatus of matter.As Fig. 2 institute
Show, the nearly eye display optical system of the present embodiment includes as the evaluating apparatus of matter: for showing the micro display screen of standard test panel
1st, optical lens 2 to be evaluated, the ccd camera for imaging, the image pick-up card 5 of collection image, for showing and dividing
Analysis processes the computer 6 of image；First ccd camera includes camera lens 3 and target surface 4.
The standard test panel that wherein micro display screen 1 display manufactures, outgoing directional light after optical lens 2 to be evaluated, then
After a ccd camera picked-up, image pick-up card 5 collection image is finally shown on computer 6.
Still optionally further, on the basis of the technical scheme of above-described embodiment, the step 103 in above-described embodiment is " near
Eye display optical system is as the physical parameter value of detection and objective physical parameter value are contrasted by the evaluating apparatus of matter and repair
Just, set up relation between the two ", specifically may include that computer by the physical parameter value detecting and objective physical parameter
Value is contrasted and is revised, and is the algorithm adopting according to debugging computer repeatedly with the latter so that the physical parameter value of detection
Tend to close to objective physical parameter value, and obtain relation between the two.
For example computer can be provided with software, can realize above-mentioned functions by software.
Still optionally further, on the basis of the technical scheme of above-described embodiment, the step 102 in above-described embodiment is " near
Eye display optical system carries out detecting the physical parameter value obtaining detecting, tool as the evaluating apparatus of matter to optical lens to be evaluated
Body includes: the standard test panel that micro display screen 1 display manufactures, outgoing directional light after optical lens 2 to be evaluated, then through the
After one ccd camera picked-up, image pick-up card 5 collection image is finally shown on computer 6；Calculated by the software on computer 6
Method carries out Treatment Analysis to acquired image, obtains the physical parameter value detecting.
Still optionally further, on the basis of the technical scheme of above-described embodiment, wherein in step 101 " to extracted
Physical parameter value is quantified, and the corresponding parameter of picture matter obtaining human eye acceptance is interval, as the physical parameter value of subjective assessment
" afterwards, step 102 " nearly eye display optical system is examined as the evaluating apparatus of matter carry out detection to optical lens to be evaluated
Survey physical parameter value " before, the evaluation method of the present embodiment can also include: camera lens 3 to a ccd camera and target surface 4,
Micro display screen 1 carries out calibrating and processes so that the performance of the optical lens 2 only to be evaluated of obtained physical parameter expression.
Calibration need to use standard lens when processing, and the machining accuracy of this standard lens is high, and error is little, with designed when parameter request symbol
That closes is fine.
Still optionally further, on the basis of the technical scheme of above-described embodiment, the step 103 in above-described embodiment is " near
Eye display optical system sets up the correspondence between the physical parameter value of detection and objective physical parameter value as the evaluating apparatus of matter
Relation ", specifically may include that nearly eye display optical system as matter evaluating apparatus by detect physical parameter value and objective thing
Reason parameter value is contrasted and is revised, and debugs nearly eye display optical system commenting as matter using the latter's parameter value as standard and judgment
Valency device is to change the physical parameter value of detection so that the thing of the detection as the evaluating apparatus detection of matter for the nearly eye display optical system
Reason parameter value is close to objective physical parameter value, and sets up corresponding relation.
The nearly eye display optical system of above-described embodiment will have subjective assessment as the computer in the evaluating apparatus of matter
Standard, treats photometry system detectio by this device, obtains the one group of parameter value that can express its performance, and then computer root
Carry out quick and accurate evaluation according to what evaluation criterion treated photometry system as matter.
Still optionally further, the nearly eye display optical system in above-described embodiment is as in the evaluating apparatus of matter, micro display screen 1
It is arranged on optical lens 2 to be evaluated, optical lens 2 to be evaluated is positioned on two-dimentional prism fixed station, a ccd camera
Camera lens 3 be placed at the emergent pupil of optical lens 2 to be evaluated, by image formation by rays in the target surface 4 of a ccd camera.
Still optionally further, the nearly eye display optical system in above-described embodiment is as in the evaluating apparatus of matter, on computer 6
The algorithm software of display and Treatment Analysis image is installed, can once obtain expressing light by Treatment Analysis software analysis image
Learn multiple physical parameter value of camera lens.Computer 6 will have the standard of subjective assessment, by this nearly eye display optical system as matter
Evaluating apparatus treat photometry system detectio, obtain the one group of parameter value that can express its performance, and then computer be according to commenting
What price card standard treated photometry system carries out quick and accurate evaluation as matter.
Still optionally further, the nearly eye display optical system in above-described embodiment is as in the evaluating apparatus of matter, micro display screen
1st, optical lens 2 to be evaluated, the camera lens 3 of a ccd camera are supported by support and are placed on guide rail, the mirror of a ccd camera
It is connected with D translation platform or corner platform under 3 support, can manually or step motor control all around moves come
The measurement effect having reached.
Still optionally further, the nearly eye display optical system in above-described embodiment is as in the evaluating apparatus of matter, micro display screen 1
Can be replaced by the mask plate that testing standard version pattern is carved with light source irradiation.
Still optionally further, the nearly eye display optical system in above-described embodiment is as, in the evaluating apparatus of matter, measurement is to be evaluated
On the axle of optical lens 2 of valency during characteristic, all devices all need to be on same guide rail straight line；If measurement axle external characteristics, need profit
It is positioned over the rotation angle disk center of circle with translation stage 9 or rotation angle disk 9, by optical lens 2 to be evaluated, the 2nd ccd camera 10 is positioned over to be treated
At the distance of exit pupil of optical lens 2 evaluated, adjust the 2nd ccd camera 10 axis and optical lens 2 axis angle to be evaluated
To angle, θ.
Fig. 3 is on the axle measure in the embodiment of the present invention optical lens to be evaluated and the test mode figure of axle external characteristics.
As shown in figure 3, on the measurement axle of optical lens 2 to be evaluated during characteristic, all devices all need to be on same guide rail straight line；If surveying
Measure its axle external characteristics, need using translation stage or rotation angle disk 9.Optical lens 2 to be evaluated is positioned over rotation angle disk 9 center of circle, the
Two ccd cameras 10 are positioned at distance of exit pupil, and the axis angle adjusting camera axis with optical lens 2 to be evaluated is to angle, θ
Can achieve detection.
Standard test panel due to being used for micro display screen 1 display showing standard test panel in the present embodiment is to contain energy
Enough measure the pattern of multiple parameters, and do not interfere with each other, so this device is permissible in the same time between measurement different parameters process
Detection is carried out to multiple parameters and obtains parametric results, shorten the purpose that detection time reaches Fast Evaluation.
The measuring principle of each different physical value is briefly described below.
For the measurement of mtf value, such as Fig. 4 is the instrumentation plan of mtf value provided in an embodiment of the present invention, such as Fig. 4 about
Shown in two width figures, black and white strip contrast before and after imaging can be varied from, and the stripe order recognition situation of different frequency is different, and
The gray value of gray-scale map is proportional to light intensity value.By analyzing the distribution situation of gray value, according toIt is calculated as
Ratio as the contrast of black and white strip in front and back, you can obtain under this frequency v obtaining mtf value, wherein m'imgRepresent the right of striped picture
Ratio degree, mobjThe contrast of expression thing.It is possible to analyze the property of contrast and resolution ratio after obtaining obtaining mtf value under some frequencies
Can, it can be seen that the performance of contrast such as when frequency is for 10lp/mm；It is the property of resolution ratio when frequency is for 30lp/mm
Energy.Certainly mtf value is bigger, and the performance of contrast or resolution ratio is better.
For the measurement of distortion, such as Fig. 5 is the instrumentation plan of distortion provided in an embodiment of the present invention.As shown in figure 5, it is abnormal
Image before change is middle square chart, as shown in figure 5, for the pincushion figure in outside after distortion.δ l and l is obtained by Algorithm Analysis,
Wherein δ l represents amount of distortion, and l represents the size before distortion, you can according to formulaTry to achieve distortion size.
For the measurement of the angle of visual field, such as Fig. 6 is the instrumentation plan of the angle of visual field provided in an embodiment of the present invention.As Fig. 6 institute
Show, with a ccd camera looks into fee waffle slab as illustrated, and then according to formulaWherein f is
The focal length of the camera lens of the first ccd camera, h is the height of imaging on the s target surface of a ccd camera, calculates the big of angle of visual field θ
Little.
For the measurement of color rendition degree, the measurement of color rendition degree needs to use 24 colour standard colorimetric cards, and principle is every
Individual color has corresponding rgb value, and colorimetric card rgb value of every kind of color before and after imaging all changes.According to reduction degree
Special algorithm can quantify color rendition degree, and before and after imaging, rgb value deviation is less, and the color rendition degree of optical system is better.
According to algorithm specific during every kind of parameter measurement and principle, you can detect the parameter size of optical system.But
Because image quality is affected by micro display screen, the camera lens of a ccd camera and target surface etc. also, also need they are carried out at demarcation
Reason.Standard lens need to be used, to measure the impact size to parameters for other devices during calibration.Between each device
It is independent, they can be regarded as cascade system and process.
After obtaining each parameter of camera lens to be measured, then the standard value obtaining with SMI measurement combines and is compared,
By repeatedly debugging the algorithm of fast checking device computer software, so that the measured value that fast check system obtains is near the mark value or be as far as possible
Certain functional relation.
According to above-mentioned embodiment, just contacting between subjective assessment and objective measurement is established by fast check system.
Then just can detect each parameter value size by check system soon, and then be evaluated according to evaluation criterion.
Finally it is noted that above example, only in order to technical scheme to be described, is not intended to limit；Although
With reference to the foregoing embodiments the present invention is described in detail, it will be understood by those within the art that: it still may be used
To modify to the technical scheme described in foregoing embodiments, or equivalent is carried out to wherein some technical characteristics；
And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (5)
1. a kind of nearly eye display optical lens is as the evaluation method of matter is it is characterised in that include:
By various objective measurement instruments, optical lens to be evaluated is measured, obtain objective physical parameter value；
The different brackets obtaining described optical lens to be evaluated is as the corresponding physical parameter value of matter；Described different brackets picture is verified
The physical parameter value answered counts for subjective assessment；And extract from described different brackets is as the corresponding physical parameter value of matter
The physical parameter value maximum on the subjective feeling impact of human eye vision；The described physical parameter value extracted is quantified, obtains
The corresponding parameter of picture matter accepting to human eye is interval, as the physical parameter value of subjective assessment；
Nearly eye display optical system carries out to described optical lens to be evaluated detecting the thing obtaining detecting as the evaluating apparatus of matter
Reason parameter value；
Described nearly eye display optical system sets up the physical parameter value of described detection and described objective thing as the evaluating apparatus of matter
Corresponding relation between reason parameter value；
Described nearly eye display optical system is as evaluating apparatus the commenting using the physical parameter value of described subjective assessment as input of matter
Price card is accurate, the physical parameter value of detection and described corresponding relation, the physics to described detection according to optical lens to be measured
Parameter value is evaluated；
Described nearly eye display optical system includes as the evaluating apparatus of matter: for showing the micro display screen (1) of standard test panel, treating
The optical lens (2) evaluated, the ccd camera being used for imaging, the image pick-up card (5) of collection image, for showing and dividing
Analysis processes the computer (6) of image；A described ccd camera includes camera lens (3) and target surface (4)；
Described nearly eye display optical system is as the evaluating apparatus of matter are by the physical parameter value of described detection and described objective physics
Parameter value is contrasted and is revised, and sets up relation between the two, specifically includes:
The physical parameter value of described detection and described objective physical parameter value are contrasted and are revised by described computer, and with
The latter is that foundation debugs the algorithm of described computer employing repeatedly so that the physical parameter value of described detection tends to close to described visitor
The physical parameter value seen, and obtain relation between the two.
2. method according to claim 1 is it is characterised in that nearly eye display optical system is as the evaluating apparatus of matter are to described
Optical lens to be evaluated carries out detecting the physical parameter value obtaining detecting, specifically includes:
The standard test panel that described micro display screen (1) display manufactures, after described optical lens (2) to be evaluated, outgoing is parallel
Light, then after a described ccd camera picked-up, described image capture card (5) collection image is finally shown in described computer
(6) on；Treatment Analysis are carried out to acquired image by the software algorithm on described computer (6), obtains described detection
Physical parameter value.
3. method according to claim 1 is it is characterised in that described to the described physical parameter value amount of carrying out extracted
Change, the corresponding parameter of picture matter obtaining human eye acceptance is interval, and after the physical parameter value of subjective assessment, described nearly eye shows
Before the evaluating apparatus of optical system picture element carry out to described optical lens to be evaluated detecting the physical parameter value obtaining detecting,
Methods described also includes:
Described camera lens (3) to a described ccd camera and described target surface (4), described micro display screen (1) carry out calibration process,
So that the performance of the only described optical lens (2) to be evaluated of obtained physical parameter expression.
4. method according to claim 1 it is characterised in that set up described detection physical parameter value and described objectively
Corresponding relation between physical parameter value, specifically includes: by the physical parameter value of described detection and described objective physical parameter
Value is contrasted and is revised, and debugs described nearly eye display optical system as the evaluation of matter using the latter's parameter value as standard and judgment
Device is to change the physical parameter value of described detection so that described nearly eye display optical system is as the institute of the evaluating apparatus detection of matter
The physical parameter value stating detection is close to described objective physical parameter value, and sets up described corresponding relation.
5. according to the arbitrary described method of claim 1-4 it is characterised in that the physical parameter value of described detection includes visual field
At least one of angle, distortion, resolution ratio, contrast, mtf value and color saturation.
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| CN105301035B (en) * | 2015-11-09 | 2017-10-31 | 中国科学院长春光学精密机械与物理研究所 | Photoetching projection objective lens fuel factor appraisal procedure |
| CN107525651A (en) * | 2016-06-22 | 2017-12-29 | 北京疯景科技有限公司 | Camera lens resolving power method of testing, apparatus and system |
| CN107515104A (en) * | 2017-09-19 | 2017-12-26 | 华勤通讯技术有限公司 | Image quality measurement device, system and method |
| CN108965867A (en) * | 2018-07-25 | 2018-12-07 | 首都师范大学 | A kind of camera image calculation method of parameters and device |
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