CN110519590A - The detection method and system of camera module - Google Patents
The detection method and system of camera module Download PDFInfo
- Publication number
- CN110519590A CN110519590A CN201910870049.5A CN201910870049A CN110519590A CN 110519590 A CN110519590 A CN 110519590A CN 201910870049 A CN201910870049 A CN 201910870049A CN 110519590 A CN110519590 A CN 110519590A
- Authority
- CN
- China
- Prior art keywords
- line
- group
- test zone
- radial line
- test
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- G03B43/00—Testing correct operation of photographic apparatus or parts thereof
-
- 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
Abstract
The application is the divisional application application No. is 201710669852.3.The invention discloses a kind of detection methods of camera module, it include: to generate test chart corresponding with camera module to be measured, the test chart include radial line to test zone and tangential line to test zone, the radial line is mutually indepedent to test zone to test zone and tangential line；The test chart or camera module to be measured are adjusted, so that the radial line is corresponding with the viewfinder area of the camera module to be measured to test zone to test zone and tangential line；Obtain the raw image of the viewfinder area；Determine the radial line to test zone and tangential line to the corresponding mtf value of test zone.The present invention also provides a kind of detection systems of camera module.The present invention improves the accuracy of detection of the test chart to camera module, and product defect rate can be effectively controlled, and reduces the after-sales service cost of manufacturer.
Description
The application is divisional application, original application application No. is 201710669852.3, the applying date is 08 month 2017 08
Day, it is entitled " detection method and system of wide-angle camera mould group ".
Technical field
The present invention relates to the detection method of optical camera technical field more particularly to a kind of wide-angle camera mould group and it is
System.
Background technique
Resolution ratio (Resolution) is also known as resolving power, resolution, analysis power, resolving power and resolving power, refers to camera shooting
Head mould group clearly reproduces the ability of subject details, it may be said that it is that a camera module image quality of measurement is most important
Parameter.And most of camera module manufacturer can all import the detection that MTF (optical transfer function) carries out resolution ratio in the industry at present,
I.e. with the test chart of camera module to be measured shooting particular space frequency, (including a variety of lines, to group, line is to group usually by unified
The vertical and horizontal black and white line of line width forms), resolution ratio is then evaluated according to its modulation degree (black and white contrast), wherein modulation degree=(most
Big brightness-minimum brightness)/(maximum brightness+minimum brightness), in general, modulation degree is bigger, and camera module shooting to be measured is anti-
Difference is bigger, illustrates that quality of camera module to be measured is better.
However, existing test chart radial line shown in Fig. 1 to group and tangential line to group interlaced arrangement by the way of, from
Above-mentioned formula (modulation degree=(maximum brightness-minimum brightness)/(maximum brightness+minimum brightness)) is learnt, when maximum brightness, minimum
When the difference of brightness is bigger, test result values are also bigger, and when the radial direction of camera module and tangential distortion factor difference are excessive
When, maximum brightness and minimum luminance value to group determining, therefore use vertical and horizontal interlaced cloth by that high direction line of resolving power
The line set carries out MTF test to the test chart of group, as long as it is good, resolution ratio that camera module, which has a direction resolving power,
Test result values are just high, and the result tested in this way is resulted in when the distortion factor in only one direction of camera module is high, with cross
The perpendicular mtf value for alternateing lines test is still high, and can not intercept out undesirable camera module, improves manufacturer after sale
Maintenance cost.
Summary of the invention
The present invention provides a kind of detection method and systems, can not accurately detect to solve existing MTF test method
The resolution ratio of camera module leads to yield decline, increases the problem of manufacturer's after cost.
On the one hand the embodiment of the present invention provides a kind of detection method of camera module, comprising:
Generate corresponding with camera module to be measured test chart, the test chart include radial line to test zone with
For tangential line to test zone, the radial line is mutually indepedent to test zone to test zone and tangential line；This step is specifically wrapped
It includes: according to the distortion information of the camera module to be measured, obtaining radial line corresponding with the distortion to test zone and cut
To line to test zone；The test chart is generated to test zone to test zone and tangential line according to the radial line；
The test chart or camera module to be measured are adjusted, so that the radial line is to test zone and tangential line to survey
It is corresponding with the viewfinder area of the camera module to be measured to try region；
Obtain the raw image of the viewfinder area；
Determine the radial line to test zone and tangential line to the corresponding mtf value of test zone；
The distortion information according to the camera module to be measured obtains radial line corresponding with the distortion to test
The step of region and tangential line are to test zone, comprising:
The first radial line is obtained to the raw image of group, first radial line is identical to the line width of lines each in group；
The first tangential line is obtained to the raw image of group, the first tangential line is identical to the line width of lines each in group；
According to first radial line to the raw image of group, the first grating profiles are generated；
According to the described first tangential line to the raw image of group, the second grating profiles are generated；
First grating profiles and the second grating profiles are adjusted, so that first grating profiles and the second grating profiles
For sine curve；
The first radial line is adjusted to the line width of lines each in group according to the first grating profiles adjusted, and it is radial to generate second
Line is to group；
The first tangential line is adjusted to the line width of lines each in group according to the second grating profiles adjusted, and it is tangential to generate second
Line is to group；
According to second radial line to group, the radial line is generated to test zone；
According to the described second tangential line to group, the tangential line is generated to test zone.
On the other hand, the embodiment of the invention also provides a kind of detection systems of camera module, comprising:
Generation module, for generating test chart corresponding with camera module to be measured, the test chart includes radial
For line to test zone and tangential line to test zone, the radial line is mutually only to test zone to test zone and tangential line
It is vertical；
Module is adjusted, for adjusting the test chart or camera module to be measured, so that the radial line is to test section
Domain and tangential line are corresponding with the viewfinder area of the camera module to be measured to test zone；
Module is obtained, for obtaining the raw image of the viewfinder area；
Determining module, for determining the radial line to test zone and tangential line to the corresponding mtf value of test zone；
The generation module includes:
Acquiring unit obtains diameter corresponding with the distortion for the distortion information according to the camera module to be measured
To line to test zone and tangential line to test zone；
Generation unit is used to according to the radial line generate the test to test zone to test zone and tangential line
Target；
The acquiring unit includes:
First obtains subelement, and for obtaining the first radial line to the raw image of group, first radial line is to each in group
The line width of lines is identical；
Second obtains subelement, and for obtaining the first tangential line to the raw image of group, the first tangential line is to each in group
The line width of lines is identical；
First generates subelement, for the raw image according to first radial line to group, generates the first grating profiles；
Second generates subelement, for the raw image according to the described first tangential line to group, generates the second grating profiles；
Subelement is adjusted, for adjusting first grating profiles and the second grating profiles, so that first grating is bent
Line and the second grating profiles are sine curve；
Third generates subelement, for adjusting the first radial line to lines each in group according to the first grating profiles adjusted
Line width, generate the second radial line to group；
4th generates subelement, for adjusting the first tangential line to lines each in group according to the second grating profiles adjusted
Line width, generate the second tangential line to group；
5th generates subelement, for, to group, generating the radial line to test zone according to second radial line；
6th generates subelement, for, to group, generating the tangential line to test zone according to the described second tangential line.
The embodiment of the present invention to group and is cut radial line by generating test chart corresponding with camera module to be measured
Mutually independent test zone is distributed in group to line, so that radial line is independent of each other to group and tangential line to group, realizes difference
Radial line is obtained to group and tangential line to the mtf value of group, improves the accuracy of detection of the test chart to camera module, it can
Effectively control product defect rate, reduces the after-sales service cost of manufacturer.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the schematic diagram that existing test chart tests group interlaced arrangement group and tangential line using radial line；
Fig. 2 is the flow diagram of the first embodiment of the detection method of wide-angle camera mould group of the present invention；
Fig. 3 is the detailed process schematic diagram of S11 in Fig. 2；
Fig. 4 is that test chart of the invention uses radial line to test zone and tangential line to the mutually indepedent cloth of test zone
Set the schematic diagram of test；
Fig. 5 is the flow diagram of the second embodiment of the detection method of wide-angle camera mould group of the present invention；
Fig. 6 is according to line to the schematic diagram for group obtaining grating profiles, the line that left side obtains for fuzzy camera module in figure
To a group image, and the grating profiles generated being corresponded to, right side is the line of clear camera module acquisition to a group image in figure, and
The corresponding grating profiles generated；
Fig. 7 is the structural schematic diagram of the first embodiment of the detection system of wide-angle camera mould group of the present invention；
Fig. 8 is the structural schematic diagram of the second embodiment of the detection system of wide-angle camera mould group of the present invention.
Specific embodiment
In order to which the technical problems, technical solutions and beneficial effects solved by the present invention is more clearly understood, below in conjunction with
Accompanying drawings and embodiments, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only used
To explain the present invention, it is not intended to limit the present invention.
When the embodiment of the present invention refers to the ordinal numbers such as " first ", " second ", unless based on context its express really it is suitable
The meaning of sequence, it should be understood that only play differentiation and be used.
Step label " S " in the embodiment of the present invention is the abbreviation of " Step ", the abbreviation as step.The embodiment of the present invention
In step sequence be illustrative, the logical relation being not limited between step.
Referring to figure 2., be wide-angle camera mould group of the invention detection method first embodiment flow diagram.
The detection method includes S11-S14:
S11 generates test chart corresponding with camera module to be measured, and the test chart includes radial line to test section
To test zone, the radial line is mutually indepedent to test zone to test zone and tangential line for domain and tangential line.
Since the distortion situation of different wide-angle camera mould groups is different, need to be directed to each wide-angle camera mould group or same
A set of wide-angle camera mould group generates corresponding test chart, the accuracy obtained so as to improve subsequent mtf value.
Radial line is to including several radial line pair in test zone, and the multiple radial line continuously arranged are to composition radial line pair
Group, in the present embodiment, a radial line is to may include a black line and a white line in the same direction and adjacent, and radial line is to group
Including a plurality of in the same direction, and the black line and white line of consecutive intervals arrangement, radial line can to the sum of the quantity of black line and white line in group
To be odd number, it is also possible to even number, the present invention is not construed as limiting.
In the present embodiment, as shown in figure 3, S11 further comprises S111-S112:
S111 obtains radial line corresponding with the distortion to survey according to the distortion information of the camera module to be measured
Region and tangential line are tried to test zone.
In this step, it is distorted mainly due to caused by distortion, by providing several groups (being typically at least greater than 3 groups) in advance
If test chart, may include multiple test zones in each preset test chart, wherein same test zone includes same
The line in direction to group (radial line is to group or tangential line to group), positioned at same test zone radial line to group or tangential line to group
Several corresponding shooting images are obtained, are selected by being shot to above-mentioned several preset test charts with different line widths
It takes in shooting image, radial line is to group or tangential line to the identical test zone of line width in group and corresponding image.Illustratively,
It include test zone a1, a2, a3......an in pre-set image A；In pre-set image B include test zone b1, b2,
b3......bn；It include test zone c1, c2, c3......cn in pre-set image C；A1, b1 are identical with the position where c1,
Identical, a3, b3 are identical with the position where c3 with the position where c2 by a2, b2, and so on.Assuming that a1, b1, c1 are radial line
To group, a2, b2, c2 be tangential line to group, and in the shooting image of pre-set image A the corresponding radial line of a1 to lines each in group
Line width is identical or approximate, then choosing a1 is radial line corresponding with distortion described in position to test zone, pre-set image B's
It is identical or approximate to the line width of lines each in group to shoot the corresponding tangential line of image b2, then choose b2 be described in position with it is abnormal
Become corresponding tangential line to test zone.It is obtained in the preset test chart of the several groups according to the method described above and distortion pair
The radial line answered is to test zone and tangential line to test zone and the corresponding location information of the test zone.
It can be learnt by foregoing description with reasoning, pre-set image A, B can be all using radial line to groups or tangential line pair
Group, when all using radial line to group or tangential line to group when, pre-set image A, B can be equally divided into multiple test zones.
S112 generates the test chart to test zone to test zone and tangential line according to the radial line.
Corresponding position on test chart can arrange the radial line that is obtained by step S111 to test zone and tangential
Line is to test zone, it should be noted that as shown in figure 4, can have multiple radial line to test section on a test chart
To test zone, the present invention is not construed as limiting for domain and tangential line.
S12 adjusts the test chart or camera module to be measured, so that the radial line is to test zone and tangential line
It is corresponding with the viewfinder area of the camera module to be measured to test zone.
This step is mainly adjusted by the relative position of test chart or camera module to be measured, makes camera module to be measured
Face test chart, and multiple default test windows in the viewfinder area of camera module to be measured and radial line are to test zone
It is corresponding to test zone with tangential line.In the present embodiment, default test window can be visible by defined area, can also
To be sightless by other positioning means.
S13 obtains the raw image of the viewfinder area.
This step can obtain the raw image of above-mentioned viewfinder area by shooting test chart, and Raw image includes test chart
Image after sensor generation, into camera images processor before all photographic intelligences, be not by any benefit
Repay the original image of calibration.
S14 determines the radial line to test zone and tangential line to the corresponding mtf value of test zone.
This step can be used by obtaining radial line respectively to test zone and tangential line to the corresponding mtf value of test zone
In the imaging quality for analyzing corresponding wide-angle camera mould group, or progress is good, substandard products judgement.
The embodiment of the present invention to group and is cut radial line by generating test chart corresponding with camera module to be measured
Mutually independent test zone is distributed in group to line, so that radial line is independent of each other to group and tangential line to group, realizes difference
Radial line is obtained to group and tangential line to the mtf value of group, improves the accuracy of detection of the test chart to camera module, it can
Effectively control product defect rate, reduces the after-sales service cost of manufacturer.
When testing wide-angle camera mould group, since serious distortion can occur for the surrounding pictures of wide-angle camera mould group (such as
Distortion and resolving power decaying) the case where, cause camera module radial and apparent difference occurs for tangential resolving power, together
When, due to distortion so that the test chart middle line of shooting is also different to the radial direction of group and tangential spatial frequency, line is in group
Black and white line may be pressed together due to distortion, and then make common MTF test method that can not normally detect wide-angle camera mould
The resolution ratio of group.
In order to solve the above technical problems, the second embodiment of the detection method of wide-angle camera mould group of the present invention is provided,
Referring to FIG. 5, being the flow diagram of the second embodiment of the detection method of wide-angle camera mould group of the invention.The detection side
Method includes S201-S213:
S201 obtains raw image of first radial line to group, line width phase of first radial line to lines each in group
Together.
S202 obtains raw image of the first tangential line to group, line width phase of the first tangential line to lines each in group
Together.
In the present embodiment, to include that line width is identical to group to group and the first tangential line be intervally arranged the first radial line
Black and white line.
S203 generates the first grating profiles according to first radial line to the raw image of group.
S204 generates the second grating profiles according to the described first tangential line to the raw image of group.
By generating brightness mechanical periodicity as shown in Figure 6 according to the difference of lines brightness in image in above-mentioned raw image
Curve is determined as the first grating profiles or the second grating profiles.It should be noted that actual first grating of the embodiment of the present invention
Curve and the second grating profiles, to generation, can be according to all continuous lines to a group life by multiple groups radial line to tangential line
At since wide-angle camera mould group can generate the distortion such as distortion, the shape of the first grating profiles and the second grating profiles is not advised
Then, specifically, the wave peak width and trough width of the first grating profiles and the second grating profiles can change in the direction of extension
Become.
S205 adjusts first grating profiles and the second grating profiles, so that first grating profiles and the second light
Grid curve is sine curve.
S206 adjusts the first radial line to the line widths of lines each in group according to the first grating profiles adjusted, generates the
Two radial line are to group.
S207 adjusts the first tangential line to the line widths of lines each in group according to the second grating profiles adjusted, generates the
Two tangential lines are to group.
By adjusting the first grating profiles and the second grating profiles, so that first grating profiles and the second grating profiles
It is corresponding at this time to adjust the first radial line to group and the first tangential line to the line width in group for relatively regular sine curve, so that
Second radial line adjusted to group and the second tangential line to group after obtaining raw image by wide-angle camera mould group, generation
Corresponding grating profiles are relatively regular sine curve.
S208 generates the radial line to test zone according to second radial line to group.
S209 generates the tangential line to test zone according to the described second tangential line to group.
In the present embodiment, radial line is a test zone respectively to test zone to test zone and tangential line,
It can be multiple test zones respectively, radial line may include all or part of second radial line to group to test zone,
Similarly, tangential line may include all or part of second tangential lines to group to test zone.
S210 generates the test chart to test zone to test zone and tangential line according to the radial line.
S211 adjusts the test chart or camera module to be measured, so that the radial line is to test zone and tangentially
Line is corresponding with the viewfinder area of the camera module to be measured to test zone.
S212 obtains the raw image of the viewfinder area.
By the adjustment of above-mentioned S201-S210, the radial line in the raw image of above-mentioned viewfinder area is realized to group and is cut
It is identical to spatial frequency of the line to group, counteract the distortion effects of wide-angle camera mould group.
S213 determines the radial line to test zone and tangential line to the corresponding mtf value of test zone.
S210-S213 is identical as the correspondence step of first embodiment, and which is not described herein again.
The embodiment of the present invention is by the first radial line according to rule to group and the first tangential line to group pre-generated first
Grating profiles and the second grating profiles, then by adjusting the first grating profiles and the second grating profiles be sine curve, reversely obtain
Take the second radial line corresponding with wide-angle camera mould group distortion situation, to group, can ensure radial line pair to group and the second tangential line
The reliability that test zone and tangential line obtain test zone eliminates the distortion of wide-angle camera mould group and does to test result
It disturbs, improves the accuracy of wide-angle camera mould group detection.
It please refers to shown in Fig. 6, the line that left side obtains for fuzzy camera module in figure is to a group image, and corresponding generates
Grating profiles, right side is the line that obtains of clear camera module to a group image, and the corresponding grating profiles generated in figure.Work as line
When (i.e. spatial frequency very little) very wide to black and white line in group, the grating profiles of formation (are generated according to black and white brightness mechanical periodicity
Curve, i.e., thick lines near-sinusoidal in figure) figure can wave it is wide very wide, at this moment clear camera module and fuzzy camera module
Imaging maximum brightness value (i.e. crest value) it is essentially identical, the imaging of clear camera module and fuzzy camera module is most
Small brightness value (i.e. valley value) is also essentially identical.And from modulation degree formula (modulation degree=(maximum brightness-minimum brightness)/(most
Big brightness+minimum brightness)) deduce, the mtf value that either clear mould group still obscures is all same bigger, affects wide-angle and takes the photograph
As the reliability of head mould group test result.
In order to solve the above technical problems, the third for providing the detection method of wide-angle camera mould group of the invention is implemented
Example.Unlike above-mentioned second embodiment:
The first radial line is adjusted to the line widths of lines each in group according to the first grating profiles adjusted above-mentioned, generates the
Two radial line to group the step of after, further includes:
Second radial line described in scaled down generates third radial line to group to the line width of lines each in group.
It is described according to second radial line to group, generate the step of radial line is to test zone, specifically: according to
The third radial line generates the radial line to test zone to group.
The first tangential line is adjusted to the line widths of lines each in group according to the second grating profiles adjusted above-mentioned, generates the
Two tangential lines to group the step of after, further includes:
Second tangential line described in scaled down generates the tangential line of third to group to the line width of lines each in group.
It is described according to the described second tangential line to group, generate the step of tangential line is to test zone, specifically: according to
The tangential line of third generates the tangential line to test zone to group.
The present embodiment by the second radial line of scaled down to group and the second tangential line to the line width of lines each in group, with
Make when obtaining the raw image of the viewfinder area, in the final grating profiles that the raw image of the viewfinder area generates, protects
In the maximum situation of wave amplitude for demonstrate,proving grating profiles, wave peak width and trough width are 1 to 3 pixel.
Due to use instead the smaller line of line width to group test when, grating profiles medium wave width narrows, and (width of peaks and troughs is equal
Reduce), although the wave for the grating profiles that at this moment left side obscures mould group in Fig. 6 is wide consistent with the right, maximum brightness (crest value)
Can be more much lower than the right, while minimum brightness (valley value) is more much higher than the right, so that the left side obscures the mtf value of mould group than right
The mtf value of the clear mould group in side is small, to ensure test accuracy rate and reliability.
It should be noted that the distance of the present embodiment preferred adjacent wave crest and trough is 1 pixel.Work as final light
When the peaks and troughs of grid curve are only a pixel, at this moment wave width has been had reached most narrow, and test result is the most accurate
With it is reliable.
The embodiment of the detection method of wide-angle camera mould group of the present invention is discussed in detail above.It will correspond to below
The system (i.e. detection system) of the above method is further elaborated.Wherein, detection system can be integrated, be also possible to fission
's.
Referring to FIG. 7, be the structural schematic diagram of the first embodiment of the detection method of wide-angle camera mould group of the invention,
For realizing the detection method in the first embodiment of the above method.Detection system 100 includes generation module 110, adjustment module
120, module 130 and determining module 140 are obtained.
Wherein, generation module 110 are connect, for generating test corresponding with camera module to be measured with adjustment module 120
Target, the test chart include radial line to test zone and tangential line to test zone, the radial line is to test zone
It is mutually indepedent to test zone with tangential line.
In the present embodiment, the generation module 110 includes acquiring unit 111 and generation unit 112: where
Acquiring unit 111 is connect with generation unit 112, for the distortion information according to the camera module to be measured, is obtained
Take radial line corresponding with the distortion to test zone and tangential line to test zone.
Generation unit 112 is used to according to the radial line generate the survey to test zone to test zone and tangential line
Test-object plate.
Module 120 is adjusted, is connect with module 130 is obtained, for adjusting the test chart or camera module to be measured, with
Keep the radial line corresponding with the viewfinder area of the camera module to be measured to test zone to test zone and tangential line.
Module 130 is obtained, is connect with determining module 140, for obtaining the raw image of the viewfinder area.
Determining module 140, for determining the radial line to test zone and tangential line MTF corresponding to test zone
Value.
The step of first embodiment of each module, unit and the above method, corresponds in the present embodiment, realizes function phase
Together, which is not described herein again.
The embodiment of the present invention to group and is cut radial line by generating test chart corresponding with camera module to be measured
Mutually independent test zone is distributed in group to line, so that radial line is independent of each other to group and tangential line to group, realizes difference
Radial line is obtained to group and tangential line to the mtf value of group, improves the accuracy of detection of the test chart to camera module, it can
Effectively control product defect rate, reduces the after-sales service cost of manufacturer.
Referring to FIG. 8, being the structural schematic diagram of the second embodiment of the detection system of wide-angle camera mould group of the invention.
For realizing the detection method in the second embodiment of the above method.Detection system 200 includes generation module 210, adjustment module
220, module 230 and determining module 240 are obtained.
In the present embodiment, the generation module 210 includes acquiring unit 211 and generation unit 212: where
Acquiring unit 211 includes that the first acquisition subelement 2111, second obtains the generation subelement of subelement 2112, first
2113, second generate subelement 2114, adjustment subelement 2115, third generate subelement the 2116, the 4th generate subelement 2117,
5th, which generates subelement 2118 and the 6th, generates subelement 21190.Wherein,
First obtains subelement 2111, connect with the first generation subelement 2113, for obtaining the first radial line to group
Raw image, first radial line are identical to the line width of lines each in group.
First generate subelement 2113, with adjustment subelement 2115 connect, for according to first radial line to group
Raw image generates the first grating profiles.
Second obtains subelement 2112, connect with the second generation subelement 2114, for obtaining the first tangential line to group
Raw image, the first tangential line are identical to the line width of lines each in group.
Second generate subelement 2114, with adjustment subelement 2115 connect, for according to the described first tangential line to group
Raw image generates the second grating profiles.
Subelement 2115 is adjusted, subelement 2116 is generated with third and the 4th generation subelement 2117 is connect, for adjusting
First grating profiles and the second grating profiles, so that first grating profiles and the second grating profiles are sine curve.
Third generates subelement 2116, connect with the 5th generation subelement 2118, for according to the first grating adjusted
Curve adjusts the first radial line to the line width of lines each in group, generates the second radial line to group.
4th generates subelement 2117, connect with the 6th generation subelement 2119, for according to the second grating adjusted
Curve adjusts the first tangential line to the line width of lines each in group, generates the second tangential line to group.
5th generates subelement 2118, for, to group, generating the radial line to test section according to second radial line
Domain.
6th generates subelement 2119, for, to group, generating the tangential line to test section according to the described second tangential line
Domain.
Generation unit 212 generates the test mark to test zone to test zone and tangential line according to the radial line
Plate.
Module 220 is adjusted, is connect with module 230 is obtained, for adjusting the test chart or camera module to be measured, with
Keep the radial line corresponding with the viewfinder area of the camera module to be measured to test zone to test zone and tangential line.
Module 230 is obtained, is connect with determining module 240, for obtaining the raw image of the viewfinder area.
Determining module 240, for determining the radial line to test zone and tangential line MTF corresponding to test zone
Value.
The step of second embodiment of each module, unit and subelement and the above method, corresponds in the present embodiment, real
Existing function is identical, and which is not described herein again.
The embodiment of the present invention is by the first radial line according to rule to group and the first tangential line to group pre-generated first
Grating profiles and the second grating profiles, then by adjusting the first grating profiles and the second grating profiles be sine curve, reversely obtain
Take the second radial line corresponding with wide-angle camera mould group distortion situation, to group, can ensure radial line pair to group and the second tangential line
The reliability that test zone and tangential line obtain test zone eliminates the distortion of wide-angle camera mould group and does to test result
It disturbs, improves the accuracy of wide-angle camera mould group detection.
The 3rd embodiment of detection system as wide-angle camera mould group of the invention is implemented with the second of above system
Unlike example:
The system also includes:
7th generates subelement, connect with the 5th generation subelement, for the second radial line described in scaled down to group
In each lines line width, generate third radial line to group.
8th generates subelement, connect with the 6th generation subelement, for the second tangential line described in scaled down to group
In each lines line width, generate the tangential line of third to group.
5th generates subelement: being specifically used for generating the radial line to test section to group according to the third radial line
Domain.
6th generates subelement: being specifically used for generating the tangential line to test section to group according to the tangential line of the third
Domain.
The present embodiment by the second radial line of scaled down to group and the second tangential line to the line width of lines each in group, with
Make when obtaining the raw image of the viewfinder area, in the final grating profiles that the raw image of the viewfinder area generates, In
In the maximum situation of the wave amplitude of grating profiles, wave peak width and trough width are 1 to 3 pixel.
Due to use instead the smaller line of line width to group test when, grating profiles medium wave width narrows, and (width of peaks and troughs is equal
Reduce), although at this moment the wave of the grating profiles of the fuzzy mould group in the left side is wide consistent with the right, maximum brightness (crest value) can be than the right side
Side it is much lower, while minimum brightness (valley value) than the right it is much higher so that the left side obscure mould group mtf value ratio on the right of it is clear
The mtf value of mould group is small, to ensure test accuracy rate and reliability.
It is apparent to those skilled in the art that for convenience and simplicity of description, only with above-mentioned each function
The division progress of module can according to need and for example, in practical application by above-mentioned function distribution by different function moulds
Block is completed, i.e., the internal structure of device is divided into different functional modules, to complete all or part of function described above
Energy.The specific work process of the system, apparatus, and unit of foregoing description, can be with reference to corresponding in preceding method embodiment
Journey, details are not described herein.
In several embodiments provided herein, it should be understood that disclosed detection system and detection method, it can be with
It realizes by another way.For example, the embodiment of detection system described above is only schematical, the module or
The division of unit, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units
Or component can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, institute
Display or the mutual coupling, direct-coupling or communication connection discussed can be through some interfaces, device or unit
Indirect coupling or communication connection can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can store in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially
The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words
It embodies, which is stored in a storage medium, including some instructions are used so that a computer
It is each that equipment (can be personal computer, server or the network equipment etc.) or processor (processor) execute the present invention
The all or part of the steps of embodiment the method.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory
(ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic or disk
Etc. the various media that can store program code.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (2)
1. a kind of detection method of camera module characterized by comprising
Generate corresponding with camera module to be measured test chart, the test chart include radial line to test zone and tangentially
For line to test zone, the radial line is mutually indepedent to test zone to test zone and tangential line；This step specifically includes: root
According to the distortion information of the camera module to be measured, radial line corresponding with the distortion is obtained to test zone and tangential line pair
Test zone；The test chart is generated to test zone to test zone and tangential line according to the radial line；
The test chart or camera module to be measured are adjusted, so that the radial line is to test zone and tangential line to test section
Domain is corresponding with the viewfinder area of the camera module to be measured；
Obtain the raw image of the viewfinder area；
Determine the radial line to test zone and tangential line to the corresponding mtf value of test zone；
The distortion information according to the camera module to be measured obtains radial line corresponding with the distortion to test zone
The step of with tangential line to test zone, comprising:
The first radial line is obtained to the raw image of group, first radial line is identical to the line width of lines each in group；
The first tangential line is obtained to the raw image of group, the first tangential line is identical to the line width of lines each in group；
According to first radial line to the raw image of group, the first grating profiles are generated；
According to the described first tangential line to the raw image of group, the second grating profiles are generated；
First grating profiles and the second grating profiles are adjusted, so that first grating profiles and the second grating profiles are positive
Chord curve；
The first radial line is adjusted to the line width of lines each in group according to the first grating profiles adjusted, generates the second radial line pair
Group；
The first tangential line is adjusted to the line width of lines each in group according to the second grating profiles adjusted, generates the second tangential line pair
Group；
According to second radial line to group, the radial line is generated to test zone；
According to the described second tangential line to group, the tangential line is generated to test zone.
2. a kind of detection system of camera module characterized by comprising
Generation module, for generating test chart corresponding with camera module to be measured, the test chart includes radial line pair
To test zone, the radial line is mutually indepedent to test zone to test zone and tangential line for test zone and tangential line；
Adjust module, for adjusting the test chart or camera module to be measured so that the radial line to test zone and
Tangential line is corresponding with the viewfinder area of the camera module to be measured to test zone；
Module is obtained, for obtaining the raw image of the viewfinder area；
Determining module, for determining the radial line to test zone and tangential line to the corresponding mtf value of test zone；
The generation module includes:
Acquiring unit obtains radial line corresponding with the distortion for the distortion information according to the camera module to be measured
To test zone and tangential line to test zone；
Generation unit is used to according to the radial line generate the test chart to test zone to test zone and tangential line；
The acquiring unit includes:
First obtains subelement, and for obtaining the first radial line to the raw image of group, first radial line is to lines each in group
Line width it is identical；
Second obtains subelement, and for obtaining the first tangential line to the raw image of group, the first tangential line is to lines each in group
Line width it is identical；
First generates subelement, for the raw image according to first radial line to group, generates the first grating profiles；
Second generates subelement, for the raw image according to the described first tangential line to group, generates the second grating profiles；
Adjust subelement, for adjusting first grating profiles and the second grating profiles so that first grating profiles and
Second grating profiles are sine curve；
Third generates subelement, for adjusting the first radial line to the line of lines each in group according to the first grating profiles adjusted
Width generates the second radial line to group；
4th generates subelement, for adjusting the first tangential line to the line of lines each in group according to the second grating profiles adjusted
Width generates the second tangential line to group；
5th generates subelement, for, to group, generating the radial line to test zone according to second radial line；
6th generates subelement, for, to group, generating the tangential line to test zone according to the described second tangential line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910870049.5A CN110519590B (en) | 2017-08-08 | 2017-08-08 | Detection method and system of camera module |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910870049.5A CN110519590B (en) | 2017-08-08 | 2017-08-08 | Detection method and system of camera module |
| CN201710669852.3A CN107561850B (en) | 2017-08-08 | 2017-08-08 | Detection method of wide-angle camera module |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710669852.3A Division CN107561850B (en) | 2017-08-08 | 2017-08-08 | Detection method of wide-angle camera module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110519590A true CN110519590A (en) | 2019-11-29 |
| CN110519590B CN110519590B (en) | 2020-11-06 |
Family
ID=60975156
Family Applications (5)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910870049.5A Active CN110519590B (en) | 2017-08-08 | 2017-08-08 | Detection method and system of camera module |
| CN201910870045.7A Active CN110579935B (en) | 2017-08-08 | 2017-08-08 | Method and system for generating test target corresponding to camera module to be tested |
| CN201910870050.8A Active CN110618580B (en) | 2017-08-08 | 2017-08-08 | Detection method and system |
| CN201911274640.0A Active CN111045287B (en) | 2017-08-08 | 2017-08-08 | Detection system of wide-angle camera module |
| CN201710669852.3A Active CN107561850B (en) | 2017-08-08 | 2017-08-08 | Detection method of wide-angle camera module |
Family Applications After (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910870045.7A Active CN110579935B (en) | 2017-08-08 | 2017-08-08 | Method and system for generating test target corresponding to camera module to be tested |
| CN201910870050.8A Active CN110618580B (en) | 2017-08-08 | 2017-08-08 | Detection method and system |
| CN201911274640.0A Active CN111045287B (en) | 2017-08-08 | 2017-08-08 | Detection system of wide-angle camera module |
| CN201710669852.3A Active CN107561850B (en) | 2017-08-08 | 2017-08-08 | Detection method of wide-angle camera module |
Country Status (1)
| Country | Link |
|---|---|
| CN (5) | CN110519590B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111601103B (en) * | 2020-05-14 | 2022-01-07 | 山东合力泰电子科技有限公司 | Method for producing wide-angle camera module by using non-wide-angle machine |
| CN115079505A (en) * | 2022-05-31 | 2022-09-20 | 合肥埃科光电科技股份有限公司 | Prism light splitting multispectral camera matching calibration device and method based on Talbot effect |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62138734A (en) * | 1985-12-13 | 1987-06-22 | Matsushita Electric Ind Co Ltd | Automatic mtf measuring instrument |
| CN1741622A (en) * | 2004-08-27 | 2006-03-01 | 鸿富锦精密工业（深圳）有限公司 | Digital image resoliving power test target and preparation method thereof |
| CN201173856Y (en) * | 2007-06-29 | 2008-12-31 | 北京创世都旅科技发展有限公司 | Detection system for detecting digital cameras complete machine performance |
| CN106527039A (en) * | 2016-09-30 | 2017-03-22 | 歌尔科技有限公司 | Resolution test chart and resolution test method of ultra-wide angle lens |
| CN106550232A (en) * | 2015-09-23 | 2017-03-29 | 广东光阵光电科技有限公司 | A kind of camera imaging quality detecting method and detecting system |
| CN106937109A (en) * | 2017-03-02 | 2017-07-07 | 湖北三赢兴电子科技有限公司 | The method that low cost judges resolution ratio of camera head level |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004134861A (en) * | 2002-10-08 | 2004-04-30 | Nikon Corp | Resolution evaluation method, resolution evaluation program, and optical apparatus |
| CN100518335C (en) * | 2004-11-06 | 2009-07-22 | 鸿富锦精密工业（深圳）有限公司 | Digital image analysis test pattern and its making method |
| JP4701030B2 (en) * | 2005-07-22 | 2011-06-15 | キヤノン株式会社 | Exposure apparatus, setting method for setting exposure parameters, exposure method, device manufacturing method, and program |
| CN100389312C (en) * | 2006-09-04 | 2008-05-21 | 北京理工大学 | Method for evaluating resolution of video camera objectively |
| CN101191995A (en) * | 2006-11-27 | 2008-06-04 | 鸿富锦精密工业（深圳）有限公司 | Optical lens test device |
| CN101458441B (en) * | 2007-12-11 | 2011-06-22 | 鸿富锦精密工业（深圳）有限公司 | Wire pair testing drawing board, lens optical parsing and measuring system and measuring method thereof |
| CN100596212C (en) * | 2008-04-14 | 2010-03-24 | 王诗 | Detectability chart board for detecting digital camera imaging quality and detection method |
| JP2010160051A (en) * | 2009-01-08 | 2010-07-22 | Mitsutoyo Corp | Correcting pattern for image devices |
| JP2012247743A (en) * | 2011-05-31 | 2012-12-13 | Konica Minolta Advanced Layers Inc | Chart for checking resolution and method for checking resolution |
| CN103024427B (en) * | 2011-09-28 | 2014-10-29 | 中国科学院西安光学精密机械研究所 | Testing method of camera modulation transfer function and testing device thereof |
| CN103037242B (en) * | 2013-01-10 | 2016-09-07 | 格科微电子（上海）有限公司 | A kind of camera module test system |
| JP2014155063A (en) * | 2013-02-08 | 2014-08-25 | Sharp Corp | Chart for resolution measurement, resolution measurement method, positional adjustment method for camera module, and camera module manufacturing method |
| US9102007B2 (en) * | 2013-08-02 | 2015-08-11 | Rofin-Sinar Technologies Inc. | Method and apparatus for performing laser filamentation within transparent materials |
| CN105592308A (en) * | 2014-10-21 | 2016-05-18 | 鸿富锦精密工业（深圳）有限公司 | Test drawing, and method and system for detecting camera module by adopting test drawing |
| CN104811692B (en) * | 2015-04-09 | 2017-09-29 | 南昌欧菲光电技术有限公司 | Method for testing camera module |
| CN106358037B (en) * | 2015-07-21 | 2018-03-02 | 九骅科技股份有限公司 | lens detection method |
| CN105203302A (en) * | 2015-09-15 | 2015-12-30 | 歌尔声学股份有限公司 | Resolution detecting method and resolution detecting device |
-
2017
- 2017-08-08 CN CN201910870049.5A patent/CN110519590B/en active Active
- 2017-08-08 CN CN201910870045.7A patent/CN110579935B/en active Active
- 2017-08-08 CN CN201910870050.8A patent/CN110618580B/en active Active
- 2017-08-08 CN CN201911274640.0A patent/CN111045287B/en active Active
- 2017-08-08 CN CN201710669852.3A patent/CN107561850B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62138734A (en) * | 1985-12-13 | 1987-06-22 | Matsushita Electric Ind Co Ltd | Automatic mtf measuring instrument |
| CN1741622A (en) * | 2004-08-27 | 2006-03-01 | 鸿富锦精密工业（深圳）有限公司 | Digital image resoliving power test target and preparation method thereof |
| CN201173856Y (en) * | 2007-06-29 | 2008-12-31 | 北京创世都旅科技发展有限公司 | Detection system for detecting digital cameras complete machine performance |
| CN106550232A (en) * | 2015-09-23 | 2017-03-29 | 广东光阵光电科技有限公司 | A kind of camera imaging quality detecting method and detecting system |
| CN106527039A (en) * | 2016-09-30 | 2017-03-22 | 歌尔科技有限公司 | Resolution test chart and resolution test method of ultra-wide angle lens |
| CN106937109A (en) * | 2017-03-02 | 2017-07-07 | 湖北三赢兴电子科技有限公司 | The method that low cost judges resolution ratio of camera head level |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110618580A (en) | 2019-12-27 |
| CN110579935A (en) | 2019-12-17 |
| CN107561850A (en) | 2018-01-09 |
| CN111045287A (en) | 2020-04-21 |
| CN110618580B (en) | 2021-08-24 |
| CN110519590B (en) | 2020-11-06 |
| CN110579935B (en) | 2021-08-24 |
| CN107561850B (en) | 2020-10-09 |
| CN111045287B (en) | 2021-08-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8436912B2 (en) | Range measurement using multiple coded apertures | |
| US8330852B2 (en) | Range measurement using symmetric coded apertures | |
| CN101326549B (en) | Method for detecting streaks in digital images | |
| CN104104882A (en) | Image flicker detection method and device, and image capturing device | |
| CN102119527A (en) | Image processing apparatus and image processing method | |
| US20110267485A1 (en) | Range measurement using a coded aperture | |
| CN108801601B (en) | Method and equipment for testing stray light noise of Fresnel lens and storage medium | |
| CN102353519A (en) | Resolving power measuring device and resolving power evaluation method for three-generation dim light image intensifier | |
| CN105204173A (en) | View synthesis correction method and device | |
| CN106454116B (en) | Automatic full focusing imaging method and device | |
| CN110519590A (en) | The detection method and system of camera module | |
| CN104065863A (en) | Image processing method and processing device | |
| JP2016526182A (en) | Method and apparatus for immediate adjustment of lens mounting flatness | |
| CN109949725A (en) | A kind of AOI system image grayscale standardized method and system | |
| CN110260945B (en) | Total reflection type gas-liquid interface flow display method and gas-liquid interface position identification method | |
| CN106226033B (en) | Detect the method and device of transparent substrates transmitance | |
| CN102236790A (en) | Image processing method and device | |
| JP2002056379A (en) | Three-dimensional data generating device | |
| CN103297799A (en) | Testing an optical characteristic of a camera component | |
| CN105807550B (en) | Inverting ultrahigh speed imaging method | |
| WO2020165581A1 (en) | Night vision device testing | |
| CN106331677B (en) | The evaluation method and system of bore hole stereoscopic display intermediate-resolution index | |
| CN110896469A (en) | Resolution testing method for three-shot photography and application thereof | |
| CN115511730A (en) | Image strobe removing method based on loop generation countermeasure network | |
| CN105007481A (en) | Method and device for generating test card |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |