CN108827599A - A kind of wide-angle mould group full filed resolving power test equipment and method - Google Patents
A kind of wide-angle mould group full filed resolving power test equipment and method Download PDFInfo
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- CN108827599A CN108827599A CN201810486043.3A CN201810486043A CN108827599A CN 108827599 A CN108827599 A CN 108827599A CN 201810486043 A CN201810486043 A CN 201810486043A CN 108827599 A CN108827599 A CN 108827599A
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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
- G01M11/02—Testing optical properties
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Abstract
A kind of wide-angle mould group full filed resolving power test equipment and method, belong to resolving power the field of test technology.Wide-angle mould group full filed resolving power test equipment of the present invention, including for placing mould group to be measured workbench, outside cover in the peripheral rack above the workbench, the display that is assemblied in the peripheral rack, top in the periphery rack is equipped with light source assembly, the workbench is equipped with the mirror-reflection component around the mould group setting to be measured, and the mirror-reflection component enters in the mould group to be measured to the light and reflection for receiving light source assembly.The present invention is suitable for the wide-angle mould group of any angle, which carries out the test of full filed resolving power using mirror-reflection, and mark version size is substantially reduced, and test equipment size reduces, and occupied area is few, and manufacturing cost, venue cost are all accordingly reduced；Mirror-reflection rim ray propagation path is shorter simultaneously, distorts smaller, effect is more preferable.
Description
Technical field
The invention belongs to resolving power the field of test technology more particularly to a kind of wide-angle mould group full filed resolving power test equipments
And method.
Background technique
Resolving power is the physical quantity that original part discreet portions ability shot is reproduced for describing micrography system, is influence amount
The important indicator of evaluation refers to camera to the expressive ability of details, the good camera of resolving power is shot in camera shooting, photographic art
Image be certainly the slightest finish it is existing as it is clear, conversely, the poor image come of shooting of resolving power is then easily lost many naked eyes
Visible details.Therefore, camera module needs the resolving power of testing lens in process of production, accurately to judge its resolving power
Situation guarantees that the camera lens of factory can satisfy application demand.
Generally when carrying out the test of camera module resolving power, mark version is illuminated using light source, chooses suitable measuring distance, benefit
It is shot with alignment lens mark version, test image is obtained by camera module and image capturing system and is shown by display
Come, test is analyzed by test software and calculate, calculates resolution value finally with the resolving power of accurately reaction shot.
Many camera modules are all big field angle camera modules at present, 100 ° ~ 200 °.But this kind of wide-angle mould group carries out solution picture
When power is tested, as wide-angle mould group field angle and focal distance increase, mark version size is also significantly increased, required test equipment ruler
It is very little also to increase accordingly, and then considerably increase manufacture difficulty and cost.Although for example big wide-angle board of many test equipments, five face machines
Platform etc. is designed to meet the requirement of big field angle camera module test, but these boards occupy biggish place space, if
Standby cost and venue cost are higher.In addition, it is generally the case that resolving power is managed less than full filed, the position of especially big field angle
It is larger to set place's distortion.If according to traditional resolving power test method, and only increase mark version by way of to wide-angle mould group into
The test of row full filed angle resolving power finally cannot achieve effective full filed resolving power test.
Application for a patent for invention CN107525651A discloses a kind of camera lens resolving power test method, apparatus and system, tool
Body discloses a kind of camera lens resolving power test method, shoots the figure that at least two target plates obtain using camera lens to be measured including obtaining
Picture, wherein the target plate is equipped at least one pattern, and plane and default spherical surface are tangent where the target plate, the default ball
Face is using the camera lens as the centre of sphere, using pre-set dimension as the spherome surface of radius；Image analysis is carried out to described image, obtains institute
Camera lens to be measured is stated in the resolving power parameter of each target plate direction visual field angular position；According to the camera lens to be measured in each target
The resolving power parameter of plate direction visual field angular position determines whether the resolving power of the camera lens to be measured is qualified.The invention is by setting
At least two target plates are set, to include the pattern of multiple target plates in acquired image when being shot using camera lens to be measured,
These patterns are at the different location of image, and then solve to be tested using only a target plate pattern because of figure in the prior art
It is judged by accident caused by the distortion of picture.But although this application solves big field angle aberration problems, but test equipment is more due to having
Block target plate, equipment size increase, and equipment cost and venue cost are also increase accordingly.
Summary of the invention
The object of the present invention is to provide a kind of wide-angle mould group full filed resolving power tests small in size, at low cost, distortion is small
Device and method.
According to above-mentioned purpose, the present invention provides a kind of wide-angle mould group full filed resolving power test equipment, including for placing
The workbench of mould group to be measured, the display for covering in the peripheral rack above the workbench outside, being assemblied in the peripheral rack,
Top in the periphery rack is equipped with light source assembly, and it is anti-that the workbench is equipped with the mirror surface being arranged around the mould group to be measured
Component is penetrated, the mirror-reflection component enters in the mould group to be measured to the light and reflection for receiving light source assembly.
Preferably, the light source assembly includes light source shelf and light source and uniform light board on the light source shelf.
Preferably, the light source is visible light source or infrared light supply.
Preferably, the mirror-reflection component includes several mirror-reflection mechanisms, several mirror-reflection mechanisms enclose
Meet the light incidence requirement of wide-angle mould group field angle resolving power test around mould group to be measured.
Preferably, the reflecting mechanism includes Z axis displacement component, X-Y axial displacement component, reflecting mirror；The reflecting mirror
The X-Y axial displacement component is assemblied in by the Z axis displacement component.
Preferably, the X-Y axial displacement component includes the mounting rack being fixed on the worktable, the water on mounting rack
Smooth bar, the horizontal slider for being slidably connected to the horizontal sliding bar, the horizontal slider is for being fixedly connected with Z axis displacement component.
Preferably, the Z axis displacement component includes the upright sliding bar being fixed on the X-Y axial displacement component, sliding
It is connected to the upright slide block of the upright sliding bar, the upright slide block is for assembling reflecting mirror.
Preferably, the reflecting mirror is connect with the Z axis displacement component by articulated manner, so that the reflecting mirror phase
The Z axis displacement component is rotated.
Preferably, the mirror-reflection component includes four mirror-reflection mechanisms, four mirror-reflection mechanisms point
Cloth is arranged symmetrically in quadrangle.
Preferably, the test equipment further includes the elevating mechanism in the peripheral rack, to control the light
Source component is moved up and down relative to the workbench to adjust the focal distance of mould group to be measured.
Preferably, the elevating mechanism includes optical axis on the workbench and screw rod, connect with the lead screw transmission
Motor and the transmission mechanism that connects the screw rod with the Shaft driving mechanism.
Preferably, the transmission mechanism includes the first belt pulley being set on the screw rod, on the optical axis
The belt of second belt pulley and connection first belt pulley and second belt pulley.
Preferably, the optical axis there are four and be distributed in the corner location of the workbench；There are two the screw rods, point
It is not distributed on two opposite sides of workbench and between two optical axises of every side.
A kind of wide-angle mould group full filed resolving power test method, using above-mentioned wide-angle mould group full filed resolving power test equipment
Carry out resolving power test；Method includes：
Step S01 obtains an at least present image；
Step S02 carries out image analysis to described image, obtains the mould group to be measured in the solution of mark version direction visual field angular position
Image force parameter, and determine the resolving power of mould group to be measured.
Preferably, the image in step S01 is the image that the mark version shot using mould group to be measured is obtained.
Preferably, step SO1 is specially：
Step S11 adjusts the test position and mould to be measured of the mirror-reflection component X-axis, Y-axis, Z-direction on the table
Focal distance of the group relative to light source assembly；
Step S12 obtains at least present image shot by mould group to be measured.
Preferably, a kind of wide-angle mould group full filed resolving power test method according to claim 16, step S11
It further include the pitching inclination angle for adjusting the mirror-reflection component.
The invention has the advantages that:
Wide-angle mould group full filed resolving power test equipment and method of the present invention, suitable for the wide-angle mould group of any angle, the test
Equipment carries out the test of full filed resolving power using mirror-reflection, and mark version size is substantially reduced, and test equipment size reduces, and takes up an area face
Product is few, and manufacturing cost, venue cost are all accordingly reduced；Mirror-reflection rim ray propagation path is shorter simultaneously, distorts smaller, effect
Fruit is more preferable.
Detailed description of the invention
Fig. 1 is the functional block diagram that wide-angle mould group resolving power tests traditional scheme；
Fig. 2 is the functional block diagram of wide-angle mould group resolving power testing scheme of the present invention；
Fig. 3 is a kind of structural schematic diagram of wide-angle mould group full filed resolving power test equipment of the present invention；
Fig. 4 is that Fig. 3 removes the structural schematic diagram after peripheral rack；
Fig. 5 is the decomposition texture schematic diagram of light source assembly in Fig. 3；
Fig. 6 is the structural schematic diagram of elevating mechanism in Fig. 3；
Fig. 7 is the structural schematic diagram of mirror-reflection component in Fig. 3.
Specific embodiment
It is described below for disclosing the present invention so that those skilled in the art can be realized the present invention.It is excellent in being described below
Embodiment is selected to be only used as illustrating, it may occur to persons skilled in the art that other obvious modifications.It defines in the following description
Basic principle of the invention can be applied to other embodiments, variant schemes, improvement project, equivalent program and do not carry on the back
Other technologies scheme from the spirit and scope of the present invention.
Many camera modules are all big field angle camera modules at present, 100 ° ~ 200 °.This kind of wide-angle mould group carries out traditional
When resolving power is tested（Referring to Fig.1）, as wide-angle mould group field angle and focal distance increase, mark version size chart can be significantly
Increase, so that test equipment overall dimensions increase, and occupy bigger place, and then increase device fabrication and place at
This.Also, resolving power is managed less than full filed, and marginal distortion is obvious, cannot achieve the test of full filed resolving power, even if can be real
Now then resolving power measuring accuracy is low.For this purpose, the resolving power test of wide-angle mould group is realized using mirror-reflection herein.It is right such as Fig. 2
Than Fig. 1, the component that mirror-reflection can be achieved is set in the periphery mould group modlue to be measured, such as reflecting mirror, can make big field angle to
Survey mould group can be received under shorter light propagation path light source irradiation after mark domain picture, thus mark version size chart without
Need to increase, it might even be possible to reduce, not only resolving power can manage full filed and mirror edges light propagation path it is short and distort it is more lower,
And the size of test equipment is reduced, reduce the costs such as device fabrication, place.
A kind of wide-angle mould group full filed resolving power test equipment of the present invention has been shown in particular in Fig. 3,4.The test equipment packet
It is soft to include workbench 1, peripheral rack 2, display 3, light source assembly 4, mirror-reflection component 5, mark version, image capturing system, test
Part.1 top of workbench is covered in outside the periphery rack 2, to shoot mark domain as when for shooting environmental provide masking sky
Between.The light source assembly 4 is set in the peripheral rack 2, and workbench described in face is arranged, and the mark version is set to the light source
The lower section of component 4, the light source assembly 4 is for lighting mark version.It is described to be measured for placing mould group 6 to be measured on the workbench 1
The camera lens part of mould group 6 is to shoot mark version.The display 3 is placed in the peripheral rack 2, for showing by be measured
The present image that mould group 6 and image capturing system obtain, and then analysis test and calculating are carried out by test software, it is final to calculate
Determine the resolving power of mould group to be measured.The mirror-reflection component 5 is set on the workbench, and is set around the mould group 6 to be measured
It sets, the mirror-reflection component 5 enters in the mould group 6 to be measured to the light and reflection for receiving light source assembly 4.For the ease of can
Depending on operation, mirror surface emitting module 5 and the mould group 6 to be measured on the workbench 1 are not covered by the peripheral rack 2.
Such as Fig. 5, the light source assembly 4 includes light source shelf 41 and light source 42 and even light on the light source shelf 41
Plate 43.The light source is visible light source or infrared light supply.The mark version is fixed on the lower section of the uniform light board 43 by structural member,
The uniform light board 43 to will put bright light source transmitting light more evenly so that mark version imaging clearly and uniformly.
Such as Fig. 7, the mirror surface emitting module 5 includes several mirror-reflection mechanisms, and several mirror-reflection mechanisms, which enclose, to be set
Meet the light incidence requirement of wide-angle mould group field angle resolving power test, the mirror-reflection mechanism around mould group 6 to be measured
There are four at least.Preferably, the mirror-reflection component 5 includes four mirror-reflection mechanisms, four mirror-reflection mechanisms
Quadrangle is distributed in be arranged symmetrically.The reflecting mechanism includes Z axis displacement component 51, X-Y axial displacement component 52, reflecting mirror 53.Institute
It states reflecting mirror 53 and the X-Y axial displacement component 52 is assemblied in by the Z axis displacement component 51.The reflecting mirror 53 is for reflecting
Light, mirror portion face the mould group 6 to be measured, and the resolving power test that the reflecting mirror mainly meets big visual field mould group is wanted
It asks, the reflecting mirror can be substituted by other devices with albedo thus, such as the plane of reflection.The X-Y axial displacement group
Part 52 includes the mounting rack 521 being fixed on workbench 1, the horizontal sliding bar 522 on mounting rack 521, is slidably connected to institute
The horizontal slider 523 of horizontal sliding bar 522 is stated, the horizontal slider 523 is for being fixedly connected with Z axis displacement component 51.In figure as it can be seen that
52 relative tilt of X-Y axial displacement component is placed in the direction of 1 plane of workbench, is existed by the movement horizontal slider 523
Position on horizontal sliding bar 522 adjusts position of the reflecting mirror in X, Y direction.The Z axis displacement component 51 includes fixing
In on the X-Y axial displacement component 52 upright sliding bar 511, be slidably connected to the upright slide block 512 of the upright sliding bar 511,
The upright slide block 512 is for assembling reflecting mirror 53.Specifically, the upright sliding bar 511 is fixed on the horizontal slider 522
On, by adjusting displacement of the upright slide block 512 on upright sliding bar 511, to adjust the position of reflecting mirror in the Z-axis direction
It sets.The reflecting mirror 53 is connect with the Z axis displacement component 51 by articulated manner, as it can be seen that Z axis displacement component 51 erects in figure
Straight slide bar 511 is connect by articulated shaft with the reflecting mirror 53, and the reflecting mirror 53 is in the circumferencial direction rotation around articulated shaft 531
When adjust the pitching inclination angle of reflecting mirror 53.
Mirror-reflection component 5 adjusts Z axis, X using Z axis displacement component 51, X-Y axial displacement component 52 in a certain range
Axis, the displacement of Y-axis, pitching inclination angle can be such that mirror-reflection component adjusts to best test position, guarantee the measuring accuracy of mould group.
Resolution standard when adjustment according to default is adjusted, and can adjust one or more mirror-reflection components 5, or adjustment mirror
One or more parameters in Z axis, X-axis, Y-axis, pitching inclination angle in face reflection subassembly 5, finally obtaining best test position is
Purpose carries out resolving power test.
Such as Fig. 6, which further includes the elevating mechanism 7 in the peripheral rack 2, to control the light source
Component 4 is moved up and down relative to the workbench 1 to adjust the focal distance of mould group to be measured.Focal distance is adjusted in combination with above-mentioned
Adjust Z axis, X-axis, the displacement of Y-axis, pitching inclination angle obtain the best test position of mirror-reflection component.The elevating mechanism 7
Including the optical axis 71 being set on workbench 1 and screw rod 72, with the motor 76 of the lead screw 72 transmission connection and by the screw rod
72 and the optical axis 71 be sequentially connected transmission mechanism.One end of the lead screw 72 be set to the workbench 1 and with the motor
76 transmission connections, the other end are connected on the light source shelf 41.Described 71 one end of optical axis is set to the workbench 1, and the other end connects
It is connected to the light source shelf 42.The light source assembly passes through the elevating movement under the drive of screw rod 72 and optical axis 71 of light source shelf 41.Institute
The driver of the screw rod 72 elevating movement on the vertical direction relative to workbench 1 can arbitrarily be driven by stating motor 76
Substitution, such as cylinder.The transmission mechanism includes the first belt pulley 73 being set on the screw rod 72, on the optical axis 71
The belt of second belt pulley 74 and connection first belt pulley 73 and second belt pulley 74.It is controlled by motor 76
Screw rod 72 is gone up and down, and the lifting force of lead screw 72 is driven to optical axis 71 using transmission mechanism, such as belt mode, so that light source group
Both sides or each position can synchronizing movings as much as possible when part 4 is gone up and down relative to workbench 1.Preferably, the optical axis 71 has four
Corner location that is a and being distributed in the workbench 1；There are two the screw rods 72, is distributed in two opposite sides of workbench 1 respectively
Above and between two optical axises 71 of every side.By transmission mechanism, the optical axis 71 of light source assembly two sides can synchronization action.
A kind of wide-angle mould group full filed resolving power test method is also provided herein, using above-mentioned wide-angle mould group full filed solution picture
Power test equipment carries out resolving power test；Method includes：
Step S01 obtains an at least present image；
Mark version is shot using mould group to be measured and obtains present image, and is marked version size and selected conventional size or even smaller size, and
It can only select a mark version that can obtain image, then realize that the resolving power for being applicable in wide-angle mould group is surveyed under using mirror-reflection
Examination.
Specifically, step SO1 includes：
Step S11 adjusts the test position and mould to be measured of the mirror-reflection component X-axis, Y-axis, Z-direction on the table
Focal distance of the group relative to light source assembly；
Step S12 obtains at least present image shot by mould group to be measured.
After light source assembly is lighted, image is obtained by shooting style.Mould group phase to be measured is adjusted by adjusting elevating mechanism 7
For the diagonal distance of light source assembly；Light is received by X-Y axial displacement component and Z axis displacement to adjust mirror-reflection component
Position, to obtain best test position and then carry out the shooting of accuracy height image.The step S11 further includes adjusting the mirror
The pitching inclination angle of face reflection subassembly adjusts the pitching of reflecting mirror using the reflecting mirror in the circumferencial direction rotation around articulated shaft
Inclination angle.
Step S02 carries out image analysis to described image, obtains the mould group to be measured in mark version direction visual field angular position
Resolving power parameter, and determine the resolving power of mould group to be measured.
Analysis test is carried out by image capturing system, test software to shooting image and is calculated, is finally calculated to be measured
The resolving power of mould group, and judge resolving power whether product Eligibility requirements, it is qualified if meeting, be unsatisfactory for unqualified, need pair
Mould group to be measured carries out precision calibration.Those skilled in the art can be used the existing published technology in this field and carry out resolving power point
Analysis calculates, and method is not uniquely, as can refer to a kind of resolving power test disclosed in first patent application CN106441804A
Method carries out.
It should be understood by those skilled in the art that foregoing description and the embodiment of the present invention shown in the drawings are only used as illustrating
And it is not intended to limit the present invention.The purpose of the present invention completely effectively realizes.Function and structural principle of the invention is in reality
It applies and shows and illustrate in example, under without departing from the principle, embodiments of the present invention can have any deformation or modification.
Claims (17)
1. a kind of wide-angle mould group full filed resolving power test equipment, including for placing mould group to be measured workbench, cover in institute outside
The display stating the peripheral rack above workbench, being assemblied in the peripheral rack, the top in the periphery rack are equipped with
Light source assembly, which is characterized in that the workbench is equipped with the mirror-reflection component around the mould group setting to be measured, the mirror
Face reflection subassembly enters in the mould group to be measured to the light and reflection for receiving light source assembly.
2. a kind of wide-angle mould group full filed resolving power test equipment according to claim 1, which is characterized in that the light source
Component includes light source shelf and light source and uniform light board on the light source shelf.
3. a kind of wide-angle mould group full filed resolving power test equipment according to claim 2, which is characterized in that the light source
For visible light source or infrared light supply.
4. a kind of wide-angle mould group full filed resolving power test equipment according to claim 1, which is characterized in that the mirror surface
Reflection subassembly includes several mirror-reflection mechanisms, and several mirror-reflection mechanisms enclose around mould group to be measured to meet wide-angle
The light incidence requirement of mould group field angle resolving power test.
5. a kind of wide-angle mould group full filed resolving power test equipment according to claim 4, which is characterized in that the reflection
Mechanism includes Z axis displacement component, X-Y axial displacement component, reflecting mirror；The reflecting mirror is assemblied in by the Z axis displacement component
The X-Y axial displacement component.
6. a kind of wide-angle mould group full filed resolving power test equipment according to claim 5, which is characterized in that the X-Y
Axial displacement component includes the mounting rack being fixed on the worktable, the horizontal sliding bar on mounting rack, is slidably connected to the water
The horizontal slider of smooth bar, the horizontal slider is for being fixedly connected with Z axis displacement component.
7. a kind of wide-angle mould group full filed resolving power test equipment according to claim 5, which is characterized in that the Z axis
Displacement component includes the upright sliding bar being fixed on the X-Y axial displacement component, is slidably connected to the vertical of the upright sliding bar
Sliding block, the upright slide block is for assembling reflecting mirror.
8. a kind of wide-angle mould group full filed resolving power test equipment according to claim 5, which is characterized in that the reflection
Mirror is connect with the Z axis displacement component by articulated manner, so that the reflecting mirror is rotated relative to the Z axis displacement component.
9. a kind of wide-angle mould group full filed resolving power test equipment according to claim 4, which is characterized in that the mirror surface
Reflection subassembly includes four mirror-reflection mechanisms, and four mirror-reflection Distribution of Institutions are arranged symmetrically in quadrangle.
10. a kind of wide-angle mould group full filed resolving power test equipment according to claim 1, which is characterized in that further include
Elevating mechanism in the peripheral rack is moved up and down to control the light source assembly relative to the workbench to adjust
The focal distance of whole mould group to be measured.
11. a kind of wide-angle mould group full filed resolving power test equipment according to claim 10, which is characterized in that the liter
Descending mechanism include optical axis on the workbench and screw rod, the motor being connect with the lead screw transmission and by the screw rod and
The transmission mechanism of the Shaft driving mechanism connection.
12. a kind of wide-angle mould group full filed resolving power test equipment according to claim 11, which is characterized in that the biography
Motivation structure includes described in the first belt pulley on the screw rod, the second belt pulley on the optical axis and connection
The belt of first belt pulley and second belt pulley.
13. a kind of wide-angle mould group full filed resolving power test equipment according to claim 11, which is characterized in that the light
There are four axis and is distributed in the corner location of the workbench；There are two the screw rods, is distributed in two opposite sides of workbench respectively
On side and between two optical axises of every side.
14. a kind of wide-angle mould group full filed resolving power test method, which is characterized in that using one of the claims 1-13 institute
The wide-angle mould group full filed resolving power test equipment stated carries out resolving power test；Method includes：
Step S01 obtains an at least present image；
Step S02 carries out image analysis to described image, obtains the mould group to be measured in the solution of mark version direction visual field angular position
Image force parameter, and determine the resolving power of mould group to be measured.
15. a kind of wide-angle mould group full filed resolving power test method according to claim 14, which is characterized in that step
Image in S01 is the image that the mark version shot using mould group to be measured is obtained.
16. a kind of wide-angle mould group full filed resolving power test method according to claim 14, which is characterized in that step
SO1 is specially：
Step S11 adjusts the test position and mould to be measured of the mirror-reflection component X-axis, Y-axis, Z-direction on the table
Focal distance of the group relative to light source assembly；
Step S12 obtains at least present image shot by mould group to be measured.
17. a kind of wide-angle mould group full filed resolving power test method according to claim 16, which is characterized in that step
S11 further includes the pitching inclination angle for adjusting the mirror-reflection component.
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| CN201810486043.3A CN108827599A (en) | 2018-05-21 | 2018-05-21 | A kind of wide-angle mould group full filed resolving power test equipment and method |
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| CN201810486043.3A CN108827599A (en) | 2018-05-21 | 2018-05-21 | A kind of wide-angle mould group full filed resolving power test equipment and method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110677641A (en) * | 2019-10-16 | 2020-01-10 | 广东以诺通讯有限公司 | Wide angle and focusing definition testing arrangement of camera |
| CN111122123A (en) * | 2019-11-26 | 2020-05-08 | 歌尔股份有限公司 | TOF module analytical force detection device and method |
| CN112461513A (en) * | 2021-01-14 | 2021-03-09 | 辽宁中蓝光电科技有限公司 | Mobile phone lens orthographic projection type testing machine |
| CN114071118A (en) * | 2020-07-30 | 2022-02-18 | 宁波舜宇光电信息有限公司 | Camera module detection equipment |
| CN114125303A (en) * | 2021-11-30 | 2022-03-01 | 重庆紫光华山智安科技有限公司 | Test image acquisition method, device, equipment and medium |
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