CN105451017A - Camera module photosensitive quality detection method and device - Google Patents
Camera module photosensitive quality detection method and device Download PDFInfo
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- CN105451017A CN105451017A CN201511016589.5A CN201511016589A CN105451017A CN 105451017 A CN105451017 A CN 105451017A CN 201511016589 A CN201511016589 A CN 201511016589A CN 105451017 A CN105451017 A CN 105451017A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
- H04N17/002—Diagnosis, testing or measuring for television systems or their details for television cameras
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
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Abstract
The invention belongs to the technical field of communication, and discloses a camera module photosensitive quality detection method and device. The method comprises the following steps: when detection light is received by the surface of a camera module, reading the conversion digital value of each photosensitive point on a photosensitive element of the camera module; calculating the difference among the conversion digital values of all the photosensitive points; and judging whether the photosensitive quality of the camera module is qualified based on the difference among the digital values and a preset threshold. The detection method and device provided by the invention have the advantages that the photosensitive quality of the camera module can be detected, so that the camera module qualification rate can be guaranteed; meanwhile, the scene restoration capability of the camera module can be ensured, so as to solve the problem that a mobile phone camera cannot adequately restore some scenes due to hardware issues.
Description
Technical field
The present invention relates to communication technique field, particularly relate to detection method and the device of the photosensitive quality of a kind of camera module.
Background technology
Along with the variation of the universal of the intelligent terminals such as mobile phone and intelligent terminal function, the requirement that the camera function of people to intelligent terminal reaches is also more and more higher.The factor affecting picture quality in process taken pictures by intelligent terminal mainly contains the difference that two: one is the camera module of intelligent terminal own, and another is the difference of later stage to the algorithm of the Data Post that camera module gathers.Prior art is day by day perfect to the algorithm of camera Data Post, and treatment effect improves a lot to picture quality, and this depends on the research of algorithm and the lifting of processor speed; Therefore, the difference of camera module becomes the principal element affecting picture quality, and camera module difference is mainly reflected in the qualitatively photosensitive of camera module, can to the detection method of the photosensitive quality of camera module and device but also do not have in prior art.
Summary of the invention
Main purpose of the present invention is the detection method and the device that propose the photosensitive quality of a kind of camera module, is intended to solve prior art not to the problem of the method and apparatus that the photosensitive quality of camera module detects.
For achieving the above object, the detection method of the photosensitive quality of a kind of camera module provided by the invention, described detection method comprises step:
When camera module surface receive detect light time, the digital quantity that on the photo-sensitive cell reading described camera module, each sensitivity speck transforms;
Calculate the difference of the digital quantity that described each sensitivity speck transforms;
Judge that whether the photosensitive quality of described camera module is qualified according to the difference of described digital quantity and predetermined threshold value.
There is provided a kind of detection method as above, the difference of the digital quantity that the described each sensitivity speck of described calculating transforms, comprising:
Calculate variance and the mean value of described digital quantity.
There is provided a kind of detection method as above, the described difference according to described digital quantity and predetermined threshold value judge that whether the photosensitive quality of described camera module is qualified, comprising:
Analyze the variance of described digital quantity and mean value whether in default error range;
Determine the photosensitive up-to-standard of described camera module when the even value of described digital quantity and variance are in described default error range, otherwise determine the photosensitive off quality of described camera module.
There is provided a kind of as above detection method, after the variance of the described digital quantity of described calculating and mean value, described method also comprises:
According to variance and the tendency drafting analogous diagram thereof of described digital quantity.
A kind of as above detection method is provided, judge described camera module photosensitive off quality after, described method also comprises:
Analyze the rotation direction in the axial plane face of the camera lens of described camera module according to described analogous diagram, thus make to described camera module timing, the axial plane of described camera lens is being rotated to the direction transforming the low sensitivity speck place of digital quantity.
A kind of detection method as above is provided, before the digital quantity that on the photo-sensitive cell of described reading described camera module, each sensitivity speck transforms, described method also comprises: under complete black experimental situation, detect light to described camera module surface Vertical Launch, described detection light is the light of a branch of energy even.
In addition, for achieving the above object, the present invention also proposes the checkout gear of the photosensitive quality of a kind of camera module, and described device comprises:
Reading unit, when detecting light for receiving on camera module surface, the digital quantity that on the photo-sensitive cell reading described camera module, each sensitivity speck transforms;
Computing unit, for calculating the difference of the digital quantity that described each sensitivity speck transforms;
According to the difference of described digital quantity and predetermined threshold value, judging unit, for judging that whether the photosensitive quality of described camera module is qualified.
A kind of as above checkout gear is provided, described computing unit also for, calculate variance and the mean value of described digital quantity.
There is provided a kind of checkout gear as above, described judging unit comprises:
Analysis module, for analyzing the variance of described digital quantity and mean value whether in default error range;
Judge module, for determining the photosensitive up-to-standard of described camera module when the even value of described digital quantity and variance are in described default error range, otherwise confirms the photosensitive off quality of described camera module.
There is provided a kind of checkout gear as above, described device also comprises:
Image-drawing unit, after the variance that calculates described digital quantity at described computing unit and mean value, draws analogous diagram according to the variance of described digital quantity and tendency thereof.
There is provided a kind of checkout gear as above, described device also comprises:
Analytic unit, for when described camera module photosensitive off quality, the rotation direction in the axial plane face of the camera lens of described camera module is analyzed, to make rotated to the direction transforming the low sensitivity speck place of digital quantity by the axial plane of described camera lens described camera module timing according to described analogous diagram.
There is provided a kind of checkout gear as above, described device also comprises:
Detect Optical Transmit Unit, for detecting light to described camera module surface Vertical Launch under complete black experimental situation, described detection light is the light of a branch of energy even.
The detection method of the photosensitive quality of a kind of camera module that the present invention proposes and device, detection rays pass through lens is utilized to import on photo-sensitive cell, by reading the digital quantity of opto-electronic conversion on photo-sensitive cell, calculate the digital quantity difference that all sensitivity specks obtain, thus detect the photosensitive quality of camera module, ensure the yield of camera module, simultaneously also can ensure the reducing power of camera module to scene, get rid of the problem that the mobile phone camera that causes due to hardware reason is not in place to some scenario reduction.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of camera module;
Fig. 2 a is the schematic diagram that light injects the photo-sensitive cell camera module vertical with camera lens axial plane;
Fig. 2 b is the schematic diagram that light injects the photo-sensitive cell camera module vertical with camera lens axial plane
The method flow diagram of the detection method of the photosensitive quality of a kind of camera module that Fig. 3 provides for the embodiment of the present invention one;
The method flow diagram of the detection method of the photosensitive quality of a kind of camera module that Fig. 4 provides for the embodiment of the present invention two;
The modular structure schematic diagram of the checkout gear of the photosensitive quality of a kind of camera module that Fig. 5 provides for the embodiment of the present invention three.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The camera realizing each embodiment of the present invention and relate to is described referring now to accompanying drawing.In follow-up description, use the suffix of such as " module ", " parts " or " unit " for representing element only in order to be conducive to explanation of the present invention, itself is specific meaning not.Therefore, " module " and " parts " can mixedly use.
Referring to Fig. 1, is the structured flowchart of camera module.Camera module comprises photo-sensitive cell 11 and camera lens 12.Photo-sensitive cell 11 and camera lens 12 are fixed together by a support, and by flexible circuit board (FlexiblePrintedCircuit, the central processing unit (CentralProcessingUnit, CPU) of FPC) drawing pin and intelligent terminal is connected.In practical application, photo-sensitive cell can adopt complementary metal oxide semiconductors (CMOS) (ComplementaryMetal-OxideSemiconductor, CMOS); Camera lens 12 can be made up of multiple lens.
After inventor finds camera module group assembling, the photosensitive quality influence of the angular error between the axial plane face of photo-sensitive cell and the axial plane of camera lens to camera module is very large.Refer to Fig. 2 a and Fig. 2 b, for light injects the schematic diagram of different camera modules.In Fig. 2 a, the angle α between the axial plane of the photo-sensitive cell 21 of camera module and the axial plane of camera lens 22 is 90 °, and namely photo-sensitive cell 21 and camera lens 22 two devices are completely vertical.Now, light 23 scioptics of a branch of energy even vertically enter camera lens 22.Due to same at same lens glazed thread decling phase, the light quantity therefore final photo-sensitive cell 21 received is identical, in post-digital processing procedure, because the spectral loss on sensor devices is identical, can be reduced into environment residing at present really.
In Fig. 2 b, angle α ' between the axial plane of the photo-sensitive cell 21 ' of camera module and the axial plane of camera lens 22 ' is less than 90 degree, therefore when the light 23 ' scioptics of a branch of energy even enter camera lens 22 ', difference is had in the decay of each lens glazed thread, the light quantity finally falling into photo-sensitive cell is uneven, the digital quantity that on photo-sensitive cell, each sensitivity speck transforms is caused also to there are differences, real colour when later image will be caused to reduce and the bottleneck of algorithm optimization.
Based on above-mentioned discovery, each embodiment of the inventive method is proposed.
Refer to Fig. 3, first embodiment of the invention proposes the detection method of the photosensitive quality of a kind of camera module, comprising:
S310, when camera module surface receive detect light time, the digital quantity that on the photo-sensitive cell reading this camera module, each sensitivity speck transforms;
S320, calculate the difference of digital quantity that each sensitivity speck transforms;
S330, judge that whether the photosensitive quality of this camera module is qualified according to the difference of this digital quantity and predetermined threshold value.
Concrete, photo-sensitive cell main operational principle utilizes photoelectric sensor to convert the light signal of incidence to digital signal, after completing conversion, utilizes CPU (as computer) digital signal on sensor devices to be read according to a definite sequence and store.In practical application, step 310, can from CPU the digital quantity of reading and converting.
In an optional scheme, step S310, read this camera module photo-sensitive cell on before the digital quantity that transforms of each sensitivity speck, the method also comprises:
Under complete black experimental situation, detect light to this camera module surface Vertical Launch, this detection light is the light of a branch of energy even.
In practical application, in order to vertically inject on camera module by the light of energy even, therefore this detection needs to carry out under complete black laboratory environment.When launching detection light, professional lamp box can be utilized the incandescent lamp energy even of 4100K colour temperature and on the vertical camera lens injecting camera module, ensure that the energy injecting light is identical consistent with direction.
In an optional scheme, step S320, calculates the difference of the digital quantity that each sensitivity speck transforms, comprising:
Calculate variance and the mean value of this digital quantity.
In practical application, MATLAB software can be utilized to calculate.
In an optional scheme, according to the difference of this digital quantity and predetermined threshold value, step S330, judges that whether the photosensitive quality of this camera module is qualified, comprising:
Analyze the variance of this digital quantity and mean value whether in default error range;
Determine the photosensitive up-to-standard of this camera module when the even value of this digital quantity and variance are in this default error range, otherwise determine the photosensitive off quality of this camera module.
In practical application, after point difference having calculated the data obtained amount and uniformity, the error amount that theoretical conversion can be utilized to draw and the actual error amount detected are made comparisons judgement, in the scope that the variance recorded as excessively actual and mean value resonable opinion error allow, then the photosensitive satisfactory quality of this camera module is described.
The detection method of the photosensitive quality of camera module of the present embodiment, detection rays pass through lens is utilized to import on photo-sensitive cell, by reading the digital quantity of opto-electronic conversion on photo-sensitive cell, calculate the digital quantity difference that all sensitivity specks obtain, thus detect the photosensitive quality of camera module, ensure the yield of camera module, also can ensure the reducing power of camera module to scene simultaneously, get rid of the problem that the mobile phone camera that causes due to hardware reason is not in place to some scenario reduction.
On the basis of above-described embodiment, the embodiment of the present invention two provides the detection method of the photosensitive quality of a kind of camera module, and refer to Fig. 4, method flow comprises:
S410, to camera module Vertical Launch detect light.
In the present embodiment, testing environment is entirely black experimental situation, detects the light that light is a branch of energy even.
S420, to read out the digital quantity that light transforms on each pixel, and to store.
S430, the mean value digital quantity of reading input MATLAB software being calculated this digital quantity, variance and tendency, and draw out analogous diagram according to the variance calculated and tendency.
In practical application, photovoltaic converter conversion formula also can be utilized to convert the digital quantity obtained to RGB component when this step of execution, and picture show, and can find out the uniformity of the digital quantity of gained so more intuitively.
S440, the mean value of calculating and variance and the threshold value preset compared judge whether the photosensitive quality of this camera module meets the requirements, if meet the requirements, perform step S460, otherwise execution S450.
In practical application, calculate data volume point difference and uniformity after, the error amount that theoretical conversion can be utilized to draw and the actual error amount recorded are made comparisons, the variance recorded as actual and evenly value are in theoretical error allowed band, the photosensitive satisfactory quality of this camera module is then described, later stage work can be carried out, otherwise its photosensitive quality is just defective.
S450, analyze the rotation direction in the axial plane face of the camera lens of this camera module according to this analogous diagram, thus make rotated to the direction transforming the low sensitivity speck place of digital quantity by the axial plane of this camera lens this camera module timing, and perform step S410.
This step is mainly to a trimming process of problem module.In practical application, the MATLAB software analysis module difference that goes wrong can be utilized mainly to there is which part, then reduce difference according to analysis result adjustment lens direction:
Variance and the mean value value of this camera module digital quantity has been drawn in step S430, and draw figure analogous diagram, camera module any Partial Conversion digital quantity clearly can be analyzed high according to analogous diagram, according to opposition thinking, camera lens axial plane is rotated to the direction that digital quantity is low, repeatedly carry out step S410 to S450 afterwards, until camera module meets the requirements.
In practical application, in testing process, when determining that the photosensitive quality of certain camera module is undesirable, can give the alarm to tester, such as send prompt tone and/or directly with the display unit of checkout gear communication on to tester point out need to correct camera module and camera lens axial plane to rotation direction.
S460, confirmation camera module are photosensitive up-to-standard.
The detection method of the photosensitive quality of camera module of the present embodiment, detection rays pass through lens is utilized to import on photo-sensitive cell, by reading the digital quantity of opto-electronic conversion on photo-sensitive cell, calculate the digital quantity difference that all sensitivity specks obtain, thus detect the photosensitive quality of camera module, ensure the yield of camera module, also can ensure the reducing power of camera module to scene simultaneously, the problem that the mobile phone camera that eliminating causes due to hardware reason is not in place to some scenario reduction, and can when detecting camera module photosensitive off quality, analyze problem module difference and mainly there is which part, and according to analysis result, problem module is corrected.
On the basis of above-described embodiment, third embodiment of the invention provides the checkout gear of the photosensitive quality of a kind of camera module further, refers to Fig. 5, and this device comprises:
Reading unit 510, when detecting light for receiving on camera module surface, the digital quantity that on the photo-sensitive cell reading this camera module, each sensitivity speck transforms;
Computing unit 520, for calculating the difference of the digital quantity that each sensitivity speck transforms;
According to the difference of this digital quantity and predetermined threshold value, judging unit 530, for judging that whether the photosensitive quality of this camera module is qualified.
In an optional scheme, this device also comprises:
Detect Optical Transmit Unit, for detecting light to this camera module surface Vertical Launch under complete black experimental situation, this detection light is the light of a branch of energy even
In an optional scheme, this computing unit 520 also for, calculate variance and the mean value of this digital quantity.
In an optional scheme, this judging unit 530 comprises:
Analysis module, for analyzing the variance of this digital quantity and mean value whether in default error range;
Judge module, for determining the photosensitive up-to-standard of this camera module when the even value of this digital quantity and variance are in this default error range, otherwise confirms the photosensitive off quality of this camera module.
In an optional scheme, this device also comprises:
Image-drawing unit, after the variance that calculates this digital quantity at this computing unit and mean value, draws analogous diagram according to the variance of this digital quantity and tendency thereof.
In an optional scheme, this device also comprises:
Analytic unit, for when this camera module photosensitive off quality, the rotation direction in the axial plane face of the camera lens of this camera module is analyzed, to make rotated to the direction transforming the low sensitivity speck place of digital quantity by the axial plane of this camera lens this camera module timing according to this analogous diagram.
The checkout gear of the photosensitive quality of camera module of the present embodiment, detection rays pass through lens is utilized to import on photo-sensitive cell, by reading the digital quantity of opto-electronic conversion on photo-sensitive cell, calculate the digital quantity difference that all sensitivity specks obtain, thus detect the photosensitive quality of camera module, ensure the yield of camera module, also can ensure the reducing power of camera module to scene simultaneously, get rid of the problem that the mobile phone camera that causes due to hardware reason is not in place to some scenario reduction.
It should be noted that, in this article, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or device and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or device.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the device comprising this key element and also there is other identical element.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
Through the above description of the embodiments, those skilled in the art can be well understood to the mode that above-described embodiment method can add required general hardware platform by software and realize, hardware can certainly be passed through, but in a lot of situation, the former is better execution mode.Based on such understanding, technical scheme of the present invention can embody with the form of software product the part that prior art contributes in essence in other words, this computer software product is stored in a storage medium (as ROM/RAM, magnetic disc, CD), comprising some instructions in order to make a station terminal equipment (can be mobile phone, computer, server, air conditioner, or the network equipment etc.) perform method described in each embodiment of the present invention.
These are only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. a detection method for the photosensitive quality of camera module, is characterized in that, described detection method comprises step:
When camera module surface receive detect light time, the digital quantity that on the photo-sensitive cell reading described camera module, each sensitivity speck transforms;
Calculate the difference of the digital quantity that described each sensitivity speck transforms;
Judge that whether the photosensitive quality of described camera module is qualified according to the difference of described digital quantity and predetermined threshold value.
2. detection method according to claim 1, is characterized in that, the difference of the digital quantity that the described each sensitivity speck of described calculating transforms, comprising:
Calculate variance and the mean value of described digital quantity.
3. detection method according to claim 2, is characterized in that, the described difference according to described digital quantity and predetermined threshold value judge that whether the photosensitive quality of described camera module is qualified, comprising:
Analyze the variance of described digital quantity and mean value whether in default error range;
Determine the photosensitive up-to-standard of described camera module when the even value of described digital quantity and variance are in described default error range, otherwise determine the photosensitive off quality of described camera module.
4. the detection method according to any one of claims 1 to 3, is characterized in that, after the variance of the described digital quantity of described calculating and mean value, described method also comprises:
According to variance and the tendency drafting analogous diagram thereof of described digital quantity.
5. detection method according to claim 4, is characterized in that, judge described camera module photosensitive off quality after, described method also comprises:
Analyze the rotation direction in the axial plane face of the camera lens of described camera module according to described analogous diagram, thus make to described camera module timing, the axial plane of described camera lens is being rotated to the direction transforming the low sensitivity speck place of digital quantity.
6. detection method according to claim 1, it is characterized in that, before the digital quantity that on the photo-sensitive cell of described reading described camera module, each sensitivity speck transforms, described method also comprises: under complete black experimental situation, detect light to described camera module surface Vertical Launch, described detection light is the light of a branch of energy even.
7. a checkout gear for the photosensitive quality of camera module, is characterized in that, described device comprises:
Reading unit, when detecting light for receiving on camera module surface, the digital quantity that on the photo-sensitive cell reading described camera module, each sensitivity speck transforms;
Computing unit, for calculating the difference of the digital quantity that described each sensitivity speck transforms;
According to the difference of described digital quantity and predetermined threshold value, judging unit, for judging that whether the photosensitive quality of described camera module is qualified.
8. checkout gear according to claim 7, is characterized in that, described computing unit also for, calculate variance and the mean value of described digital quantity.
9. checkout gear according to claim 8, is characterized in that, described judging unit comprises:
Analysis module, for analyzing the variance of described digital quantity and mean value whether in default error range;
Judge module, for determining the photosensitive up-to-standard of described camera module when the even value of described digital quantity and variance are in described default error range, otherwise confirms the photosensitive off quality of described camera module.
10. the checkout gear according to any one of claim 7 to 9, is characterized in that, described device also comprises:
Image-drawing unit, after the variance that calculates described digital quantity at described computing unit and mean value, draws analogous diagram according to the variance of described digital quantity and tendency thereof;
Analytic unit, for when described camera module photosensitive off quality, the rotation direction in the axial plane face of the camera lens of described camera module is analyzed, to make rotated to the direction transforming the low sensitivity speck place of digital quantity by the axial plane of described camera lens described camera module timing according to described analogous diagram.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511016589.5A CN105451017A (en) | 2015-12-29 | 2015-12-29 | Camera module photosensitive quality detection method and device |
| PCT/CN2016/112174 WO2017114368A1 (en) | 2015-12-29 | 2016-12-26 | Method and device for processing photosensitive quality of camera module, and storage medium |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201511016589.5A CN105451017A (en) | 2015-12-29 | 2015-12-29 | Camera module photosensitive quality detection method and device |
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| CN106572346B (en) * | 2016-09-28 | 2019-02-26 | 深圳市泰吉通电子有限公司 | 360 degree of monoscopic video data correcting methods of one kind and correction system |
| CN108197560A (en) * | 2017-12-28 | 2018-06-22 | 努比亚技术有限公司 | Facial image recognition method, mobile terminal and computer readable storage medium |
| CN113194305A (en) * | 2021-04-09 | 2021-07-30 | 深圳市磐锋精密技术有限公司 | Detection device and detection method for photosensitive element of mobile phone |
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