CN106657786B - Improve camera module non-horizontal directions and shoots compensation method out of focus - Google Patents
Improve camera module non-horizontal directions and shoots compensation method out of focus Download PDFInfo
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- CN106657786B CN106657786B CN201611217990.XA CN201611217990A CN106657786B CN 106657786 B CN106657786 B CN 106657786B CN 201611217990 A CN201611217990 A CN 201611217990A CN 106657786 B CN106657786 B CN 106657786B
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- value
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- mould group
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/67—Focus control based on electronic image sensor signals
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/28—Systems for automatic generation of focusing signals
- G02B7/36—Systems for automatic generation of focusing signals using image sharpness techniques, e.g. image processing techniques for generating autofocus signals
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
- G03B13/32—Means for focusing
- G03B13/34—Power focusing
- G03B13/36—Autofocus systems
Abstract
The invention discloses a kind of improvement camera module non-horizontal directions to shoot compensation method out of focus, based on new samples, upward direction is simulated in fixed nearly defocus distance and in downward direction in offset (the upward representative value C1 of fixed remote defocus distance with normal distribution, downward representative value C2), the upward representative value C1 and downward representative value C2 are the nearly burnt average value and remote burnt average value of each mould group upward direction of sample and clearly code value and horizontal direction the focusing clearly normal distribution of the difference △ value of code value of focusing in downward direction；The method need to only increase the process station of both direction in early period, when volume production can this two fixed code values of direct burning, eliminate the process having more and save manpower.Signal out is fed back according to different directions when hand-held shooting and calls directly burning compensation code value, can greatly improve the failure probability of upward and downward direction, while improving focusing speed compared to common focusing method, the user experience is improved.
Description
Technical field
The present invention relates to camera module technical fields, are specifically related to a kind of improvement camera module non-horizontal directions shooting mistake
Burnt compensation method.
Background technique
Smart phone camera module, tablet computer camera module with gravity sensing sensor etc. use VCM (focusing voice coil
Motor, hereinafter referred to as VCM) focusing when taking pictures, influenced by camera module group lens self weight, it is horizontal, upwards (comprising tilting upward
And forward), (comprising diagonally downward and downward), three directions are clear to same distance focusing downwards, the promotion of required VCM
Power code value is different.When mobile phone camera module, the focusing of tablet computer camera module are taken pictures, to guarantee camera module focusing
The consistency volume production requirement of performance, it will usually when horizontal direction increase each camera module of burning fixes position shape library
The code value of VCM.But the code value of remote when will not usually go burning upward and downward direction shape library, nearly coke VCM, because of meeting
Hall space and making technology are greatly occupied equivalent to increase 2 times, production efficiency is greatly reduced and increases people
Power cost.Burnt range is sought using increase focus process to contain upwards by take pictures smart machine manufacturer of some with automatic focusing function
Focusing performance in downward direction, but still have a certain proportion of defocusing phenomenon and increase and seek burnt range, it will lead to level
The focusing time in direction obviously increases, in addition the shake that hand-held racket shines, increases the probability out of focus of horizontal direction, user's body instead
It tests undesirable.Therefore, cutting needs one kind that can improve method out of focus of focusing when direction is shot upward or downward.
Summary of the invention
In order to solve the above-mentioned technical problem, the present invention proposes that a kind of improvement camera module non-horizontal directions shoots benefit out of focus
Compensation method, significantly improves upward (comprising tilting upward and forward) or (comprising diagonally downward and downward), direction is clapped downwards
Focusing problem out of focus when taking the photograph synchronizes focusing speed when improving direction shooting upward or downward, improves product and uses body
It tests.
The technical scheme of the present invention is realized as follows:
A kind of improvement camera module non-horizontal directions shoots compensation method out of focus, includes the following steps:
A) in the certain amount sample of close, the remote incipient scorch record completion of previous level, remote burnt and close coke code value is being picked out just
State distribution is located in the middle a certain proportion of mould group and picks out that remote coke code value normal distribution is to the left, nearly coke code value normal state
Be distributed a certain proportion of mould group to the right, component type than more comprehensive new samples, and calculate horizontal nearly coke average value G1 with
Horizontal remote burnt average value G2, as horizontal representative value；
B) consistent with horizontal nearly incipient scorch record distance, by each mould group of new samples, nearly burnt auto-focusing is clear upwards, and records this
The code value of articulation point；Consistent with horizontal remote incipient scorch record distance, by each mould group of new samples, remote burnt auto-focusing is clear downwards, and remembers
Record the code value of this articulation point；
C) take each mould group of new samples focus upwards clearly code value, downwards focusing clearly code value with level it is corresponding away from
Difference △ value from clear code value of focusing, carries out normal distribution fitting, obtains nearly burnt average value upwards, burns as upward direction
The upward representative value C1 of compensation is recorded, and obtains remote burnt average value downwards, the downward representative value C2 as the compensation of burning in downward direction；
D) upward representative value C1 and downward representative value C2 are verified, with the suitable new samples quantity of determination；
Linear relationship of the mould group code value that can be all tested according to usual processing procedure with corresponding lens location value in three directions
Curve obtains depanning group in VCM starting current S1, S2, the S3 in horizontal, upward, downward three directions, and calculates mould group VCM
Focusing slope K=(K1+K2+K3)/3, nearly, far burnt focusing it is clear when corresponding camera lens stop place be calculated as P1, P2, according to
The available horizontal direction ideal focusing stroke of above data meets following formula:
G=[(P1-P2)/K+ (G1-G2)]/2；
Increase the upward representative value C1 of burning, the mould group of downward representative value C2 compensation is focused at the D1 of upward direction camera site
It clearly takes pictures and grabs log, analyze the clear code value W1 that currently focuses；It focuses at camera site D2 in downward direction and clearly claps
According to and grab log, analyze current focusing code value W2；
If the following conditions are met:
|[(G+C1)+S2]-W1|≤20；And | [(G-C2)+S3]-W2 |≤20；
Then assert that the focusing precision of the mould group has reached expection；
E) directly increase burning upward representative value C1 and downward representative value C2 when volume production.
Further, 100pcs~300pcs of close, the remote incipient scorch record completion of previous level is chosen as sample, is picked out
10%~40% remote burnt and 10%~40% nearly coke code value normal distribution is located in the middle mould group, 5%~15% remote incipient scorch record
The mould group that code value normal distribution is to the left, 5%~15% nearly incipient scorch record code value normal distribution is to the right, component type are more comprehensive
New samples.
Further, choose the 200pcs that previous level is close, the record of remote incipient scorch is completed and be used as sample, pick out 25% it is remote it is burnt with
25% nearly coke code value normal distribution is located in the middle that mould group, 10% remote incipient scorch record code value normal distribution be to the left, 10% nearly coke
Burning code value normal distribution mould group to the right, component type is than more comprehensive total 140pcs new samples.
The beneficial effects of the present invention are: the present invention, which provides a kind of improvement camera module non-horizontal directions, shoots compensation out of focus
Method, throughput antenatal period count a certain number of samples, simulate upward direction in fixed nearly defocus distance with normal distribution
In downward direction in the offset of fixed remote defocus distance (upward representative value C1, downward representative value C2), the upward representative value C1
For the focusing of each mould group upward direction of sample clearly code value and horizontal direction focus clearly code value difference △ value just
The nearly burnt average value of state distribution；The downward representative value C2 is that each mould group of sample is focused clearly code value and level side in downward direction
To the remote burnt average value for the clearly normal distribution of the difference △ value of code value of focusing；The method only need to increase by two sides in early period
To process station, when volume production can this two fixed code values of direct burning, eliminate the process having more and save manpower.
According to different directions when hand-held shooting feed back signal out call directly burning compensation code value, can greatly improve upwards and to
The failure probability in lower direction, while focusing speed is improved compared to common focusing method, the user experience is improved.
Detailed description of the invention
Fig. 1 is that the horizontal nearly incipient scorch of the present invention records schematic diagram；
Fig. 2 is that the horizontal remote incipient scorch of the present invention records schematic diagram；
Fig. 3 is the nearly coke code value normal distribution schematic diagram of the present invention；
Fig. 4 is the remote coke code value normal distribution schematic diagram of the present invention；
Fig. 5 is that nearly incipient scorch records schematic diagram to the present invention upwards；
Fig. 6 is that remote incipient scorch records schematic diagram to the present invention downwards；
Fig. 7 is that poor (the horizontal difference with the nearly coke code value of the two state upwards) normal distribution of the closely burnt posture of the present invention is illustrated
Figure；
Fig. 8 is that poor (the horizontal difference with the nearly coke code value of the two state upwards) normal distribution of the far burnt posture of the present invention is illustrated
Figure；
Fig. 9 is the linear relationship curve of corresponding lens location (position) value of three direction code values of the invention.
Specific embodiment
In order to be more clearly understood that technology contents of the invention, spy lifts following embodiment and is described in detail, and purpose is only
It is to be best understood from the protection scope that the contents of the present invention are not intended to limit the present invention.
A kind of improvement camera module non-horizontal directions shoots compensation method out of focus, includes the following steps:
A) in the certain amount sample of close, remote incipient scorch record (referring to Fig. 1 and Fig. 2) completion of previous level, remote coke is picked out
And nearly coke code value normal distribution be located in the middle a certain proportion of mould group and pick out far coke code value normal distribution it is to the left,
Nearly coke code value normal distribution a certain proportion of mould group to the right, component type is than more comprehensive new samples, referring to Fig. 3 and Fig. 4,
And horizontal nearly coke average value G1 and horizontal remote burnt average value G2 are calculated, as horizontal representative value；Wherein, it when horizontal close burnt, surveys
Attempt to be arranged in the horizontal direction as 2 with camera module 1, auto-focusing is clear.When horizontal remote burnt, test image 2, simulation teleconverter
3 are arranged in the horizontal direction with camera module 1, and auto-focusing is clear.
B) consistent with horizontal nearly incipient scorch record distance, by each mould group of new samples, nearly burnt auto-focusing is clear upwards, referring to Fig. 5,
And record the code value of this articulation point；Incipient scorch record distance remote with level is consistent, by the downward remote burnt auto-focusing of each mould group of new samples
Clearly, referring to Fig. 6, and the code value of this articulation point is recorded；Wherein, when close burnt upwards, test image 2 and camera module 1 are hanging down
For histogram to setting, auto-focusing is clear.When remote burnt downwards, test image 2, simulation teleconverter 3 and camera module 1 are in vertical direction
Setting, auto-focusing are clear.
C) take each mould group of new samples focus upwards clearly code value, downwards focusing clearly code value with level it is corresponding away from
Difference △ value from clear code value of focusing, carries out normal distribution fitting, referring to figs. 7 and 8, obtains nearly burnt average value upwards,
It as the upward representative value C1 of upward direction burning compensation, and obtains remote burnt average value downwards, is compensated as burning in downward direction
Downward representative value C2；
D) upward representative value C1 and downward representative value C2 are verified, with the suitable new samples quantity of determination；
Linear relationship of the mould group code value that can be all tested according to usual processing procedure with corresponding lens location value in three directions
Curve obtains depanning group in VCM starting current S1, S2, the S3 in horizontal, upward, downward three directions referring to Fig. 9, and calculates this
The focusing slope K of mould group VCM=(K1+K2+K3)/3, nearly, far burnt focusing it is clear when corresponding camera lens stop place be calculated as P1,
P2 meets following formula according to the available horizontal direction ideal focusing stroke of above data:
G=[(P1-P2)/K+ (G1-G2)]/2；
Increase the upward representative value C1 of burning, the mould group of downward representative value C2 compensation is focused at the D1 of upward direction camera site
It clearly takes pictures and grabs log (log), analyze the clear code value W1 that currently focuses；It focuses at camera site D2 in downward direction
It clearly takes pictures and grabs log (log), analyze current focusing code value W2；
If the following conditions are met:
|[(G+C1)+S2]-W1|≤20；And | [(G-C2)+S3]-W2 |≤20；
Then assert that the focusing precision of the mould group has reached expection；
E) directly increase burning upward representative value C1 and downward representative value C2 when volume production.
In principle, sample size is more, the offset C1 and C2 obtained more meet focusing precision needs, the present embodiment,
It is remote to pick out 10%~40% as sample by the preferred 100pcs~300pcs for choosing close, the remote incipient scorch record completion of previous level
Burnt and 10%~40% nearly coke code value normal distribution is located in the middle mould group, 5%~15% remote incipient scorch record code value normal state point
The mould group that cloth is to the left, 5%~15% nearly incipient scorch record code value normal distribution is to the right, component type is than more comprehensive new samples.More
Choosing, the 200pcs of close, the remote incipient scorch record completion of previous level is chosen as sample, picks out 25% remote burnt and 25% nearly coke code
Value normal distribution is located in the middle that mould group, 10% remote incipient scorch record code value normal distribution be to the left, 10% nearly incipient scorch is recording code value just
State is distributed mould group to the right, and component type is than more comprehensive total 140pcs new samples.Based on the sample, the upward representative value that obtains
C1 and downward representative value C2 can preferably meet the needs of focusing precision.
The present invention proposes that a kind of improvement camera module non-horizontal directions shoots compensation method out of focus, significantly improves upwards
(comprising tilting upward and forward) or downwards the focusing problem out of focus (comprising diagonally downward and downward) when the shooting of direction, together
Step improves focusing speed when direction shooting upward or downward, improves product usage experience.
Above embodiments are referring to attached drawing, to a preferred embodiment of the present invention will be described in detail.Those skilled in the art
Member by above-described embodiment carry out various forms on modification or change, but without departing substantially from essence of the invention in the case where, all
It falls within the scope and spirit of the invention.
Claims (3)
1. a kind of improvement camera module non-horizontal directions shoots compensation method out of focus, characterized by the following steps:
A) in the certain amount sample of close, the remote incipient scorch record completion of previous level, remote burnt and close coke code value normal state point is picked out
Cloth is located in the middle a certain proportion of mould group and picks out that remote coke code value normal distribution is to the left, nearly coke code value normal distribution
A certain proportion of mould group to the right, component type calculate horizontal nearly coke average value G1 and level than more comprehensive new samples
Remote coke average value G2, as horizontal representative value；
B) consistent with horizontal nearly incipient scorch record distance, by each mould group of new samples, nearly burnt auto-focusing is clear upwards, and it is clear to record this
The code value of point；Consistent with horizontal remote incipient scorch record distance, by each mould group of new samples, remote burnt auto-focusing is clear downwards, and records this
The code value of articulation point；
C) each mould group of new samples is taken to focus upwards auto-focusing clearly code value, downwards focusing auto-focusing clearly code value
The difference △ value for clear code value of focusing with horizontal respective distances carries out normal distribution fitting, obtains nearly burnt average value upwards, makees
For the upward representative value C1 of upward direction burning compensation, and remote burnt average value downwards is obtained, as the compensation of burning in downward direction
Downward representative value C2；
D) upward representative value C1 and downward representative value C2 are verified, with the suitable new samples quantity of determination；
Linear relationship curve of the mould group code value that can be all tested according to usual processing procedure with corresponding lens location value in three directions,
Depanning group VCM starting current S1, S2, S3 and level in horizontal, upward, downward three directions, upward, downward three directions
Mould group code value and the slope K 1 of the relation curve of corresponding lens location value, K2, K3, and the focusing for calculating mould group VCM is oblique
Rate K=(K1+K2+K3)/3, nearly, far burnt focusing it is clear when corresponding camera lens stop place be calculated as P1, P2, according to above data
Available horizontal direction ideal focusing stroke meets following formula:
G=[(P1-P2)/K+ (G1-G2)]/2；
Increase the upward representative value C1 of burning, the mould group of downward representative value C2 compensation is focused clearly at the D1 of upward direction camera site
It takes pictures and grabs log, analyze the clear code value W1 that currently focuses；It focuses at camera site D2 in downward direction and clearly takes pictures simultaneously
Log is grabbed, current focusing code value W2 is analyzed；
If the following conditions are met:
|[(G+C1)+S2]-W1|≤20；And | [(G-C2)+S3]-W2 |≤20；
Then assert that the focusing precision of the mould group has reached expection；
E) directly increase burning upward representative value C1 and downward representative value C2 when volume production.
2. improvement camera module non-horizontal directions according to claim 1 shoots compensation method out of focus, it is characterised in that:
Choose 100pcs~300pcs that previous level is close, the record of remote incipient scorch is completed and be used as sample, pick out 10%~40% it is remote it is burnt with
It is inclined that 10%~40% nearly coke code value normal distribution is located in the middle mould group, 5%~15% remote incipient scorch record code value normal distribution
Mould group left, 5%~15% nearly incipient scorch record code value normal distribution is to the right, component type is than more comprehensive new samples.
3. improvement camera module non-horizontal directions according to claim 2 shoots compensation method out of focus, it is characterised in that:
The 200pcs of close, the remote incipient scorch record completion of previous level is chosen as sample, is picking out 25% remote burnt and 25% nearly coke code value just
State distribution is located in the middle that mould group, 10% remote incipient scorch record code value normal distribution be to the left, 10% nearly incipient scorch record code value normal state is divided
Cloth mould group to the right, component type is than more comprehensive total 140pcs new samples.
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107643579B (en) * | 2017-09-05 | 2020-05-12 | 江西合力泰科技有限公司 | Method for improving focusing consistency of camera |
| CN108376394B (en) * | 2018-01-12 | 2021-08-10 | 上海大学 | Camera automatic focusing method and system based on frequency domain histogram analysis |
| CN111726527B (en) * | 2020-06-23 | 2021-11-16 | 上海摩勤智能技术有限公司 | Focus testing method and device |
| CN114339017B (en) * | 2020-09-29 | 2023-11-21 | 北京小米移动软件有限公司 | Distant view focusing method, device and storage medium |
| CN113766213A (en) * | 2021-09-02 | 2021-12-07 | 信利光电股份有限公司 | Method for improving AF burning parameter detection efficiency of camera module |
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| JP2010141068A (en) * | 2008-12-11 | 2010-06-24 | Sumco Corp | Method of manufacturing epitaxial wafer |
| CN103185948A (en) * | 2011-12-31 | 2013-07-03 | 索尼爱立信移动通讯有限公司 | Camera module, electronic device containing camera module and automatic focusing method |
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