CN1831626A - Automatic focusing method of digital imaging system and its browsing automatic analytic reading method - Google Patents
Automatic focusing method of digital imaging system and its browsing automatic analytic reading method Download PDFInfo
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- CN1831626A CN1831626A CN200510052628.7A CN200510052628A CN1831626A CN 1831626 A CN1831626 A CN 1831626A CN 200510052628 A CN200510052628 A CN 200510052628A CN 1831626 A CN1831626 A CN 1831626A
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Abstract
An automatic focusing method of digital imaging system includes providing a digital imaging system with photosensitive coupling element, setting focusing test drawing on preset focal length position of said system, applying software scan identification and preview mode to read image of focusing test drawing into storage of said system by photosensitive coupling element, converting image analysis line to be resolvable line number, deciding whether preset analysis requirement is met by said system or not according to amount of line number, using driving unit to drive image to position required by preset analysis.
Description
Technical field
The present invention resolves interpretation method automatically relevant for a kind of automatic focusing method and preview thereof of digital imaging system, especially refer to a kind of geometric figure that adopts particular design, and use corresponding mathematical algorithm with the time domain space change into the frequency domain space, resolve interpretation method automatically with the automatic focusing method and the preview thereof of the digital imaging system that quantizes test result.
Background technology
The analytic ability of digital display circuit is an important parameter of reflection system imaging sharpness, also is one of important indicator weighing the digital display circuit imaging effect.Digital display circuit to different image quality, along with the requirement of researching and developing, the production cycle shortens day by day and the production system automatic capability promotes, accurately adjusting the focal length of digital display circuit and judge that accurately the analytic ability of digital display circuit has become the important requirement that research and development, production firm's yield and automatic capability promote, also is simultaneously a difficult point in the digital display circuit production run.
See also shown in Figure 1ly, it is the process flow diagram of the focus adjustment method of known digital imaging system, and its step includes: at first, print the different concentric circles of live width on white paper, be placed on the geometry object distance of optical system (S100); Then, by optical system, go up formed dynamic image (S102) at TV, computing machine or LCD (LiquidCrystal Display) with preview; Then, adopt the optical interference phenomenon in the artificial process decision chart picture to judge articulation point (S104), this part is bigger with operating personnel's empirical relationship, can't quantize accurate focusing, also can't take the parsing quality of balance of whole image into account, adjust the digital display circuit of coming out and can't guarantee to resolve the requirement that reaches required, and the influence of focusing accuracy tested person ambient brightness, even the direction of light source also influences very huge to the precision of focusing.
See also shown in Figure 2ly, it is the process flow diagram of the another kind of focus adjustment method of known digital imaging system, and its step includes: at first, print the different concentric circles of live width on white paper, be placed on the geometry object distance of optical system (S200); Then, be converted into contrast (S202),, represent resolution also high (S204) when contrast numerical value is big by will the focus readability of situation of software or DSP (Digital Signal Processors) hardware system; When contrast numerical value is little, represent resolution low (S206).Yet contrast is subjected to the influence of ambient brightness very big, no matter brightness is bigger or less, contrast value is all less than normal thereupon.And, owing to cause the transmittance difference of eyeglass different piece in optical imaging system design and the manufacture process, bigger to the influence of contrast.So cause having the optical system of same analytic ability easily, owing to the difference of transmittance produces software or DSP returns the bigger situation of contrast value deviation, so can't reach the current analytic ability of accurate reflection.
See also shown in Figure 3ly, it is the process flow diagram of the parsing interpretation method of known digital imaging system, and its step includes: at first, print the black and white horizontal bands pattern (S300) of different distance on white paper; Then, take pictures, and import the pattern of taking in the computing machine (S302); Then, resolve interpretation (S304) by human eye or software.
There are following shortcoming in the focus adjustment method of existing digital imaging system and parsing interpretation method thereof:
(1) the method must be imported the pattern of taking into computing machine row judgement again, and cost is longer on the time.That is the measuring technology spended time is longer, and production operation process complexity causes automaticity low.
(2) adopt human eye subjective determination resolution, can't quantize, and because the error that human eye is judged, easily cause the error of interpretation.
(3) external factor influences such as the brightness of resolution judgement tested person environment, colour temperature are bigger.
As from the foregoing, the focus adjustment method of above-mentioned known digital imaging system and parsing interpretation method thereof on reality is used, obviously have inconvenience and exist with defective, and can wait to be improved.
Summary of the invention
Fundamental purpose of the present invention provides a kind of focus adjustment method of digital imaging system and resolves interpretation method, it adopts the geometric figure of particular design, and use corresponding algorithm with the time domain space change into the frequency domain space, to quantize test result, can get rid of simultaneously the influence of surrounding environment, make focusing accuracy consistent, and then improve and produce precision, automaticity and the speed of production of adjusting with parsing precision effect.
To achieve the above object, the invention provides a kind of automatic focusing method of digital imaging system, its step includes: at first, provide a digital imaging system with sensitization coupling element (CCD) or complementary metal oxide semiconductor (CMOS) (CMOS); Then, the focusing test pattern is set on the predetermined focal distance position of this digital imaging system; Then,,, utilize software scans identification, read in the storer of this digital imaging system in the preview mode the imaging of this focusing test pattern by this sensitization coupling element or complementary metal oxide semiconductor (CMOS); Continue, the parsing lines of changing this imaging become distinguishable number of lines; Then, according to the number of this number of lines, whether reach predetermined parsing requirement to judge this optical imaging system; At last, by drive unit, make the optical imagery of this optical system rest on this predetermined position of resolving requirement, thereby reach the requirement of adjusting the predetermined focal distance position.
According to design of the present invention, this focusing test pattern is a chequered with black and white geometric figure.
According to design of the present invention, this chequered with black and white geometric figure can be the radial lines or the circle out figure of black and white parallel lines, level or the vertical direction of at least one group of level and vertical direction combination.
According to design of the present invention, in the step of this conversion, further comprise: mathematical model is provided: V=V (n)/V (n+1); Wherein V represents in the scanning process, the ratio of two adjacent peak brightnesss; Last peak brightness in V (n) the expression scanning process; In V (n+1) the expression scanning process, the peak brightness that newly scans; Judge the relation of V and V_Level; If V＞=V_Level, then the WhiteBlackCnt value adds 1; If V＜V_Level, then the WhiteBlackCnt value remains unchanged, and continues the next peak value of scanning; Wherein V_Level represent this focusing test pattern the minimum ratio limit that changes of predetermined black and white; WhiteBlackCnt represents distinguishable number of lines; And after finishing a scan period, can obtain the WhiteBlackCnt value.
According to design of the present invention, in the step of this judgement, comprise that further the size of judgement WhiteBlackCnt value can confirm promptly whether this optical system position has reached the clear position of target.
According to design of the present invention, this drive unit is a step motor.
According to design of the present invention, whether this judgement optical imaging system reaches in the step that predetermined parsing requires, if not, then drive this drive unit, continues the judgement of the next position of this focusing test pattern.
According to design of the present invention, after the step of the judgement of the next position of this continuation focusing test pattern, further comprise, if judge that this optical imaging system can't satisfy predetermined parsing requirement, promptly be judged to defective products.
To achieve the above object, the invention provides a kind of preview and resolve interpretation method automatically, its step includes: at first, provide a digital imaging system with sensitization coupling element (CCD) or complementary metal oxide semiconductor (CMOS) (CMOS); Then, the focusing test pattern is set on the predetermined focal distance position of this digital imaging system; Then,,, utilize software scans identification, read in the storer of this digital imaging system in the preview mode the imaging of this focusing test pattern by this sensitization coupling element or complementary metal oxide semiconductor (CMOS); Continue, the parsing lines of changing this imaging become distinguishable number of lines; Then, according to the number of this number of lines, whether reach predetermined parsing requirement to judge this optical imaging system; At last, by drive unit, make the optical imagery of this optical system rest on this predetermined position of resolving requirement, thereby reach the requirement of adjusting the predetermined focal distance position.
Reach technology, means and the effect that predetermined purpose is taked in order further to understand the present invention, see also following about detailed description of the present invention and accompanying drawing, believe purpose of the present invention, feature and characteristics, go deep into and concrete understanding when getting one thus, yet appended accompanying drawing only provides reference and explanation usefulness, is not to be used for the present invention is limited.
Description of drawings
Fig. 1 is the process flow diagram of the focus adjustment method of known digital imaging system;
Fig. 2 is the process flow diagram of the another kind of focus adjustment method of known digital imaging system;
Fig. 3 is the process flow diagram of the parsing interpretation method of known digital imaging system;
Fig. 4 is the process flow diagram of the automatic focusing method of digital imaging system of the present invention;
Fig. 5 is the graph of a relation of distinguishable lines quantity of the present invention and analytic ability;
Fig. 6 is the physical location of photoimaging of the present invention system and the corresponding relation figure of analytic ability (decidable number of lines);
Fig. 7 is the synoptic diagram that time domain of the present invention is changeed frequency domain;
Fig. 8 is the scanning synoptic diagram clearly of the single parsing horizontal line of the present invention graphical analysis focus adjustment method;
Fig. 9 is the fuzzy synoptic diagram of scanning of the single parsing horizontal line of the present invention graphical analysis focus adjustment method;
Figure 10 is the synoptic diagram of the parsing focus adjustment method of the multiple parsing horizontal/vertical of the present invention bargraphs;
Figure 11 is the synoptic diagram of the parsing focus adjustment method of the radial lines figure of the present invention;
Figure 12 is the synoptic diagram of the parsing focus adjustment method of circle out figure of the present invention; And
Figure 13 is the process flow diagram that interpretation method is resolved in the preview of digital imaging system of the present invention automatically.
Embodiment
See also shown in Figure 4ly, it is the process flow diagram of the automatic focusing method of digital imaging system of the present invention.By among the figure as can be known, the step of the automatic focusing method of digital imaging system includes: at first, on the optics object distance of digital display circuit, place the geometric focusing test pattern (S400) of the parallel lines of black and white be printed on one group or several groups of levels and vertical direction (or a group or several groups of radial lines, or circle out figure); Then, sensitization coupling element (Charge Coupled Device by digital display circuit, CCD) or complementary metal oxide semiconductor (CMOS) (Complementary Metal-Oxide Semiconductor CMOS) reads in system storage (RAM) zone (S402) with panorama (Full Frame) imaging mode preview; Then, utilize the software scans mode that the pattern on the zone that requires to resolve interpretation is scanned identification, with emulation human eye interpretation analysis mode, the time domain space (Time Domain) of the physical model above the pattern is changed into frequency domain space (Frequency Domain) (S404); Continue, with the figure of the different resolution areas of the analytic value of mathematical computations mode calculation system and change slivering number (S406) then, and judge according to the number of bar number whether optical imaging system reaches predetermined parsing and require (S408).See also shown in Figure 5ly, it is the graph of a relation of the distinguishable lines quantity of the present invention and analytic ability, and wherein, distinguishable lines quantity is many more, and analytic ability is high more.
When the quantity of distinguishable lines was drawn lines quantity unanimity with actual picture, analytic ability was in mxm..Pass through drive unit, it can be a CD-ROM drive motor (figure does not show), in order to drive optical imaging system, distinguishable number of lines is carried out in each position of optical imaging system calculate and judged, like this when judging that optical imaging system reaches the predetermined requirement of resolving, simultaneously, in can reaching the setting analytical range, find out the highest position of distinguishable number of lines, drive step motor, allow optical imagery rest on this position, thereby reach the requirement (S410) of adjusting focal position.If in the movable scope of optical system, do not find that distinguishable number of lines meets the requirements of the position, promptly this optical imaging system of decidable can't satisfy the parsing requirement of setting, promptly is judged to defective products (S412).See also shown in Figure 6ly, it is the physical location of photoimaging of the present invention system and the corresponding relation figure of analytic ability (decidable number of lines).
As shown in Figure 6, in the optical imaging system motion process, analytic ability normally presents the crest of analytic value in certain position, is the position of whole imaging system analytic ability the best herein.The automatic focusing process is found out this position exactly and is allowed optical imaging system rest on this position, and adopts physics mode to be fixed.The focusing that guarantees optical system is clear.
The focusing test pattern with white as background color, the length and width size is with the requirement collocation of concrete object distance and CCD or cmos imaging, be printed on black and white parallel lines (or one group or several groups of radial lines of one group or several groups of levels and vertical direction on the figure, or circle out figure) geometric figure, figure that each test zone printed is consistent or require to draw the radial of different width or several groups of parallel lines according to the analytic ability of zones of different, lines are divided into level and vertical direction, also can go out with circle out.The size of black and white distance is promptly represented different analytic abilities on the figure.The direction of scanning is with picture black and white direction unanimity, in the scanning process, every brightness value on the scanning pattern is write down, and and the some brightness of front make comparisons, when ratio surpasses certain limit, promptly be judged to be the variation of black and white, thereby distinguishable number of lines adds one.
See also shown in Figure 7ly, it is the synoptic diagram that time domain of the present invention is changeed frequency domain.The present invention utilizes the ratio of crest value and trough value as the mathematical model of judging black and white.Wherein:
V1～V11: represent the brightness value that draws in the scanning process respectively;
V (n): last peak brightness in the expression scanning process;
V (n+1): the peak brightness that newly scans in the expression scanning process;
V: the ratio of two adjacent peak brightnesss in the expression scanning process;
V_Level: the minimum ratio limit that the black and white that expression is set changes.
V_current: represent current brightness value.
WhiteBlackCnt: represent distinguishable number of lines: initial value is 0, and it is zero that expression can scan the number of lines of telling at present.
In the scanning process,, be about to WhiteBlackCnt and add 1, represent distinguishable whenever scanning the black and white boundary.When this numerical value reaches actual number of lines, i.e. expression system reaches target and resolves the position.
The scanning beginning, because being the white portion from figure, scanning begins scanning, go up the brightness V_current of white portion so can publish picture at once, and make V1=V_current, continue scanning, the brightness ratio V1 that draws in scanning process is big, is about to V1=V_current, the brightness V_current that obtains in the scanning process; When V_current reaches brightness value hour, be designated as V2, adopt following calculated with mathematical model:
V＝V(n)/V(n+1)
Result of calculation V is judged the relation of itself and V_Level:
(1) if there is the black and white boundary in V＞=V_Level between expression V1 and V2.WhiteBlackCnt adds 1;
(2) if there is not the black and white boundary in V＜V_Level between expression V1 and V2, WhiteBlackCnt remains unchanged, and continues to scan next peak value.If scan to such an extent that the brightness value of back rises, represent that this is the luminance errors scope, belong to system interference or do not reach clear.
Get off when a scan period, can obtain the WhiteBlackCnt value, judge that the size of WhiteBlackCnt value can confirm promptly whether the optical system position has reached the clear position of target.
Fail to reach when the position of pre-provisioning request and set to resolve when requiring, drive step motor, continue the judgement of next position.After in adjustable scope, carrying out whole process affirmation analytic value, determine the most clear position of optical imaging system, allow optical imaging system rest on this position, thereby realize accurately focusing.
Because being the mode and the mechanical automatic focusing principle that adopt the interpretation of simulation human eye to resolve, the method forms closed control system, judge that by system analytic value drives optical imaging system, relief optical imaging system rests on articulation point position, thereby realizes focusing.
More than be the mathematical model and the corresponding decision method of single focusing system.To the focusing mode of various different focusing figure and analysis diagram, its mathematical model and relative theory come from above-mentioned.
Carefully state as follows to the mathematical model and the practical methods that adopt different focusing patterns:
(1) please read Fig. 8 and shown in Figure 9, it is clear with the fuzzy synoptic diagram of scanning of the single parsing horizontal line of the present invention graphical analysis focus adjustment method, it uses this step motor to drive the mechanical part of optical imaging system, and wherein the speed of this step motor is done corresponding the adjustment according to the camera lens virtual rating; Then, in per step or every a few step, pause, to read picture; Then, according to dotted portion among Fig. 8 and Fig. 9, at the picture assigned address respectively from level and vertical scan direction; Read the invocation point brightness value according to system again, adopt the mathematical model of distinguishable number of lines to judge black line or white line bar; After scanning is finished, according to the number of lines of scanning gained and the actual number of lines of drawing relatively, draw the corresponding relation of optical imaging system stop position and analytic ability; Drive at last step motor by optical imaging system rest on scan the maximum position of number of lines, this is the articulation point position.If in the movable scope of optical system, do not find that distinguishable number of lines meets the requirements of the position, promptly this optical imaging system of decidable can't satisfy the parsing requirement of setting, promptly is judged to defective products (as shown in Figure 9).
(2) see also shown in Figure 10ly, it is the synoptic diagram of the parsing focus adjustment method of the multiple parsing horizontal/vertical of the present invention bargraphs, and it uses step motor to drive the mechanical part of optical imaging system, and speed is done corresponding the adjustment according to the camera lens virtual rating.In per step or every a few step, pause, read picture then, then at the picture assigned address respectively to the lines of different analytic value from level and vertical scan direction, scan mode as dotted portion among the figure, read the invocation point brightness value according to system again, adopt the mathematical model of distinguishable number of lines to judge black line or white line bar, after scanning is finished, number of lines and the actual number of lines of drawing according to the scanning gained compare, and draw the corresponding relation of optical imaging system stop position and analytic ability.Drive at last step motor by optical imaging system rest on scan the maximum position of number of lines, this is the articulation point position.
(3) see also shown in Figure 11ly, it is the synoptic diagram of the parsing focus adjustment method of the radial lines figure of the present invention.It uses step motor to drive the mechanical part of optical imaging system, and speed is done corresponding the adjustment according to the camera lens virtual rating.In per step or every a few step, pause, read picture then, then at the picture assigned address respectively from level and vertical scan direction, and prolong the radiation scanning direction, as the scan mode of dotted portion among the figure, read the invocation point brightness value according to system again, adopt the mathematical model of distinguishable number of lines to judge black line or white line bar, after scanning is finished, according to the number of lines of scanning gained and the actual number of lines of drawing relatively, draw the corresponding relation of optical imaging system stop position and analytic ability.
(4) see also shown in Figure 12, the synoptic diagram of the parsing focus adjustment method of its circle out figure of the present invention.It uses step motor to drive the mechanical part of optical imaging system, and speed is done corresponding the adjustment according to the camera lens virtual rating.In per step or every a few step, pause, read picture then, prolong among the figure dotted portion then and begin scanning, read the invocation point brightness value according to system, adopt the mathematical model of distinguishable number of lines to judge black line or white line bar, after scanning is finished, according to the number of lines of scanning gained and the actual number of lines of drawing relatively, draw the corresponding relation of optical imaging system stop position and analytic ability.
In addition, see also shown in Figure 13, interpretation method is resolved in the preview that the invention provides a kind of digital imaging system automatically, and its step includes: at first, provide a digital imaging system (500) with sensitization coupling element (CCD) or complementary metal oxide semiconductor (CMOS) (CMOS); Then, the focusing test pattern is set on the predetermined focal distance position of this digital imaging system (502); Then,,, utilize software scans identification, read in the storer (504) of this digital imaging system in the preview mode the imaging of this focusing test pattern by this sensitization coupling element or complementary metal oxide semiconductor (CMOS); Continue, the parsing lines of changing this imaging become distinguishable number of lines (506); Then, according to the number of this number of lines, to judge whether this optical imaging system reaches predetermined parsing and require (508); At last, by drive unit, make the optical imagery of this optical system rest on this predetermined position of resolving requirement, thereby reach the requirement (510) of adjusting the predetermined focal distance position.
Therefore, it is about the same with the automatic focusing principle that resolution principle is resolved in preview, directly imaging gained figure is directly carried out the calculating (scanning process is with automatic focusing principle unanimity) of distinguishable number of lines by system, if distinguishable number of lines reaches the number of lines (analytic value of setting) of setting, promptly can make analytic ability and judge.This invention is different with other method to be the direct image that obtains during by the imaging system preview, utilize the calculating and the image-capable of digital display circuit itself, directly RAW Image Data (raw image data) is analyzed and handles, draw distinguishable number of lines.Because this carries out reading of distinguishable number and judges that the result can judge consistent with human eye for simulation human eye method.Simultaneously, can save and to take pictures, read in computing machine and adopt software systems to open the step of spectral discrimination, the speed of speed production.In addition, because it has fixing computing formula and method, can avoid fully guaranteeing the consistance of result of determination owing to the subjective difference in operating personnel's mood, human eye long working fatigue, the different work personnel's judgement.
The above; only be the detailed description and the accompanying drawing of one the specific embodiment of the best of the present invention; but feature of the present invention is not limited thereto; be not in order to restriction the present invention; all scopes of the present invention should be as the criterion with appended claims; all closing in the embodiment of the spirit variation similar of claims of the present invention with it; all should be contained in the category of the present invention; anyly be familiar with this operator in the field of the invention, can think easily and variation or modify all can be encompassed within protection scope of the present invention.
Claims (9)
1, a kind of automatic focusing method of digital imaging system, comprising step have:
One digital imaging system with sensitization coupling element or complementary metal oxide semiconductor (CMOS) is provided;
The focusing test pattern is set on the predetermined focal distance position of this digital imaging system;
By this sensitization coupling element or complementary metal oxide semiconductor (CMOS), with the imaging of this focusing test pattern, utilize software scans identification, read in the storer of this digital imaging system in the preview mode;
The parsing lines of changing this imaging become distinguishable number of lines;
According to the number of this number of lines, whether reach predetermined parsing requirement to judge this optical imaging system; And
By drive unit, make the optical imagery of this optical system rest on this predetermined position of resolving requirement, thereby reach the requirement of adjusting the predetermined focal distance position.
2,, it is characterized in that this focusing test pattern is a chequered with black and white geometric figure as the automatic focusing method of claim 1 a described digital imaging system.
3,, it is characterized in that this chequered with black and white geometric figure can be the radial lines or the circle out figure of black and white parallel lines, level or the vertical direction of at least one group of level and vertical direction combination as the automatic focusing method of claim 2 a described digital imaging system.
4,, it is characterized in that further comprising in the step of this conversion as the automatic focusing method of claim 1 a described digital imaging system:
Provide mathematical model: V=V (n)/V (n+1); Wherein V represents in the scanning process, the ratio of two adjacent peak brightnesss; Last peak brightness in V (n) the expression scanning process; In V (n+1) the expression scanning process, the peak brightness that newly scans;
Judge the relation of V and V_Level; If V＞=V_Level, then the WhiteBlackCnt value adds 1; If V＜V_Level, then the WhiteBlackCnt value remains unchanged, and continues the next peak value of scanning; Wherein V_Level represent this focusing test pattern the minimum ratio limit that changes of predetermined black and white; WhiteBlackCnt represents distinguishable number of lines; And
After finishing a scan period, can obtain the WhiteBlackCnt value.
5, as the automatic focusing method of claim 4 a described digital imaging system, it is characterized in that in the step of this judgement, comprise that further the size of judgement WhiteBlackCnt value can confirm promptly whether this optical system position has reached the clear position of target.
6,, it is characterized in that this drive unit is a step motor as the automatic focusing method of claim 1 a described digital imaging system.
7, as the automatic focusing method of claim 1 a described digital imaging system, it is characterized in that whether this judgement optical imaging system reaches in the step that predetermined parsing requires, if not, then drive this drive unit, continue the judgement of the next position of this focusing test pattern.
8, as the automatic focusing method of claim 7 a described digital imaging system, after it is characterized in that the step of judgement of next position of this continuation focusing test pattern, further comprise,, promptly be judged to defective products if judge that this optical imaging system can't satisfy predetermined parsing requirement.
9, interpretation method is resolved in a kind of preview of digital imaging system automatically, comprising step have:
One digital imaging system with sensitization coupling element or complementary metal oxide semiconductor (CMOS) is provided;
The focusing test pattern is set on the predetermined focal distance position of this digital imaging system;
By this sensitization coupling element or complementary metal oxide semiconductor (CMOS), with the imaging of this focusing test pattern, utilize software scans identification, read in the storer of this digital imaging system in the preview mode;
The parsing lines of changing this imaging become distinguishable number of lines; And
According to the number of this number of lines, whether reach predetermined parsing requirement to judge this optical imaging system.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103365099A (en) * | 2012-03-31 | 2013-10-23 | 上海微电子装备有限公司 | Focusing and leveling signal processing method |
| WO2015157962A1 (en) * | 2014-04-17 | 2015-10-22 | 深圳市大疆创新科技有限公司 | Method and apparatus for adjusting lens mounting flatness in real time |
-
2005
- 2005-03-07 CN CN200510052628.7A patent/CN1831626A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103365099A (en) * | 2012-03-31 | 2013-10-23 | 上海微电子装备有限公司 | Focusing and leveling signal processing method |
| WO2015157962A1 (en) * | 2014-04-17 | 2015-10-22 | 深圳市大疆创新科技有限公司 | Method and apparatus for adjusting lens mounting flatness in real time |
| JP2016526182A (en) * | 2014-04-17 | 2016-09-01 | エスゼット ディージェイアイ テクノロジー カンパニー リミテッドＳｚ Ｄｊｉ Ｔｅｃｈｎｏｌｏｇｙ Ｃｏ．，Ｌｔｄ | Method and apparatus for immediate adjustment of lens mounting flatness |
| US10375383B2 (en) | 2014-04-17 | 2019-08-06 | SZ DJI Technology Co., Ltd. | Method and apparatus for adjusting installation flatness of lens in real time |
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