CN108646514A - Image header parsing power test pattern - Google Patents
Image header parsing power test pattern Download PDFInfo
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- CN108646514A CN108646514A CN201810730899.0A CN201810730899A CN108646514A CN 108646514 A CN108646514 A CN 108646514A CN 201810730899 A CN201810730899 A CN 201810730899A CN 108646514 A CN108646514 A CN 108646514A
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Abstract
The embodiment of the present application discloses a kind of camera shooting header parsing power test pattern, including：Center focusing area, the first visual field radial direction resolving power item and the tangential resolving power item of the first visual field；The first visual field radial direction resolving power item and the tangential resolving power item of first visual field focus area as the center of circle using the center, it is distributed in arc-shaped, so that including multiple resolving powers on same circumference, when measuring the camera of different parsing power, the corresponding resolving power segment of different parsing power can be detected on circular arc without adjusting camera position, carry the regression nature of high parsing power test, improve supplier, terminal resolving power test correspondence, reduce testing tool complexity, simplify normalization management and control difficulty, improves testing efficiency.
Description
Technical field
The invention relates to mobile terminal test technical fields, more particularly to camera shooting header parsing power test pattern.
Background technology
Continuous with mobile terminal is popularized, and camera has been known as the standard configuration of mobile terminal, and almost every movement is whole
End is each equipped with camera.The clarity of camera also known as parses power or resolution ratio, is the important ginseng for embodying camera quality
Number.Therefore, the test phase of mobile terminal needs accordingly to test camera.
The test mode of parsing power includes spatial frequency response (Spatial Frequency Response, SFR), modulation
Tri- kinds of transmission function (Modulation Transfer Function, MTF) and television line TVline.TVline is as wherein most
Intuitive a kind of test mode, using ISO12233 as the standard of parsing.In the regions reading TV line of TVline test patterns
TVline lines both horizontally and vertically to extend to being distributed, and the reading area of same position, numerical value is higher closer to central vision,
Numerical value is lower closer to field of view edge.
But since different camera clarity require different, the odjective causes such as required distance difference, lead when measuring resolution
Cause is susceptible to that supplier, terminal resolving power test correspondence are bad, and terminal test tool is complicated, is not easy unified management and control etc. and asks
Topic, it is seen that the normalization management and control difficulty of Camera Test is high at present.
Invention content
The purpose of the embodiment of the present application is to provide a kind of camera shooting header parsing power test pattern, can reduce camera shooting header parsing power
The normalization management and control difficulty of test.
The embodiment of the present application provides a kind of camera shooting header parsing power test pattern, including：
Center focusing area, the first visual field radial direction resolving power item and the tangential resolving power item of the first visual field；
The first visual field radial direction resolving power item and the tangential resolving power item of first visual field are with center focusing area
The center of circle is distributed in arc-shaped.
Further, the first visual field radial direction resolving power item and the tangential resolving power item of first visual field are with the center
Focusing area is the center of circle, is distributed in arc-shaped, including：
First visual field radial direction resolving power item and the tangential resolving power item of first visual field focus area as the center of circle using the center,
Distribution in rounded shape.
Further, the first visual field radial direction resolving power item and the tangential resolving power item of first visual field are with the center
Focusing area is the center of circle, is distributed in arc-shaped, including：
The first visual field radial direction resolving power item and the tangential resolving power item of first visual field are with center focusing area
The center of circle, it is symmetrical in arc-shaped.
Further, the first visual field radial direction resolving power item, including：The continuous radial resolving power item of first son of multistage,
The tangential resolving power item of first son is decomposed by horizontal resolving power item, and each tangential resolving power item of first son is directed toward institute
State center focusing area.
Further, the tangential resolving power item of first visual field, including：The continuous tangential resolving power item of first son of multistage,
The tangential resolving power item of first son is decomposed by vertical definition item, each tangential resolving power direction of first son with
A circular tangential direction is identical where the circular arc.
Further, the first visual field radial direction resolving power item and the tangential resolving power item of first visual field are with the center
Focusing area is the center of circle, is distributed in arc-shaped, including：
The first visual field radial direction resolving power item and the tangential resolving power item of first visual field are with center focusing area
The center of circle is distributed in default circular trace in arc-shaped, the default circular trace be with the center focus district center point and
It images four vertex of header parsing power test pattern and the circle of preset ratio determination, the preset ratio is less than 1.
Further, further include：Second visual field radial direction resolving power item and the tangential resolving power item of the second visual field；
The second visual field radial direction resolving power item and the tangential resolving power item of second visual field are with center focusing area
The center of circle is distributed in arc-shaped, and the first average resolving power of the first visual field radial direction resolving power item is more than the second visual field diameter
To the second average resolving power of resolving power item.
Further, the first visual field radial direction resolving power item and the tangential resolving power item place circular arc pair of first visual field
The first radius answered is less than circular arc pair where the second visual field radial direction resolving power item and the tangential resolving power item of second visual field
The second radius answered.
Further, the second visual field radial direction resolving power item and the corresponding resolving power area of the tangential resolving power item of the second visual field
Between it is identical, the first visual field radial direction resolving power item and the corresponding resolving power section of the tangential resolving power item of the first visual field are identical.
Further, the first visual field radial direction resolving power item and the tangential resolving power item of first visual field correspond at least two
A resolving power section.
The camera shooting header parsing power test pattern provided in the embodiment of the present application, be provided with the first visual field radial direction resolving power item and
The tangential resolving power item of first visual field；And the first visual field radial direction resolving power item and the tangential resolving power of the first visual field are distributed with arc-shaped
Item so that include multiple resolving powers on same circumference, when measuring the camera of different size, without adjusting camera position i.e.
It can detect that parsing power test can be completed in the corresponding resolving power segment of different parsing power on circular arc, propose high parsing power test
Regression nature, improve supplier, terminal resolving power test correspondence, reduce testing tool complexity, it is difficult to simplify normalization management and control
Degree improves testing efficiency.
Description of the drawings
Fig. 1 is the structural schematic diagram of camera shooting header parsing power test pattern in the prior art；
Fig. 2 is a kind of structural schematic diagram of camera shooting header parsing power test pattern provided by the embodiments of the present application.
Specific implementation mode
Further illustrate the technical solution of the application below with reference to the accompanying drawings and specific embodiments.It is appreciated that
It is that specific embodiment described herein is used only for explaining the application, rather than the restriction to the application.It further needs exist for illustrating
, illustrate only for ease of description, in attached drawing and the relevant part of the application rather than entire infrastructure.
Power is parsed in Camera Test field to be also known as resolving power, resolution ratio, analysis power, decomposing force, resolving power, differentiate this
Neck, discernibility or resolution.The test mode for parsing power includes spatial frequency response (Spatial Frequency
Response, SFR), modulation transfer function (Modulation Transfer Function, MTF) and television line TVline tri-
Kind.TVline is as a kind of wherein most intuitive test mode, using ISO12233 as the standard of parsing.TVline test patterns
The regions reading TV line in TVline lines to being distributed both horizontally and vertically to extend, the reading area of same position, numerical value gets over
For height closer to central vision, numerical value is lower closer to field of view edge.The standard that ISO12233 is used parses power test pattern, optional
For ISO12233 4X chart, as shown in Figure 1, including：Vertical definition item (VerticalRes), comparison bar
(ContrastIndicator), diagonal line resolving power item (DiagonalRes), center focusing area
(CenterFocusingArea) and horizontal resolving power item (HorizontalRes).Wherein, vertical definition item
(VerticalRes) it is used to detect the resolving power that can estimate camera lens to vertical image.Compare bar
(ContrastIndicator) it is used to show and detect the comparison situation under spatial frequency difference.Diagonal line resolving power item
(DiagonalRes) it is 45 degree of inclined diagonal line resolving power items.Center focusing area (CenterFocusingArea) is two kinds
The concentric circles of different frequency, for assisting focusing.Horizontal resolving power item (HorizontalRes) can estimate camera lens pair for detecting
The resolving power of horizontal image.
Illustratively, 2000 camera visible resolution (Line centered on the corresponding specification of 1300w (ten thousand) pixel parsing power
Widths per Picture Height, LW/PH), it is located at the position 1-1 and level of mark 20 in vertical definition item
The position 1-2 of mark 20 in resolving power item.It is that 2400 camera of center visually divides that 1600w (ten thousand) pixel, which parses the corresponding specification of power,
Resolution is located at the position 1-4 of mark 24 in the position 1-3 and horizontal resolving power item of mark 24 in vertical definition item.It surveys
When examination, camera is carried out according to center focusing area to defocused, the center of circle in the centrally located focusing area of focus.Using the center of circle as zero,
To image the vertex of header parsing power test pattern as 1F, generate concentric circles B where concentric circles A, 0.6F where 0.3F and
Concentric circles C where 0.8F.When being fixed to school center, 1300W management and control region is horizontal direction 0.3F (visual field)/vertical area
For 0.35F (visual field), 1600W management and control region is that horizontal direction 0.25F (visual field)/vertical area is 0.3F (visual field).As it can be seen that depositing
Different in same camera central horizontal and vertical area management and control position, different camera centers are vertical and central horizontal position
There is test zone deviation in equal different problems, i.e. same position.Therefore adjustment camera position is needed, but dollying head
Test position will increase testing cost.
The region of the reading tv line for the standard parsing power test pattern that ISO12233 is used all is from both horizontally and vertically
Extend, causes in the reading area of same position, numerical value is higher closer to central vision, and numerical value is lower to be regarded closer to edge
.The region of test zone and terminal management and control parsing power when the camera shooting header parsing power shipment of supplier is corresponding, camera lens factory
Camera lens mtf test positions and camera shooting header parsing power test management and control region when shipment are also corresponding.At this point, camera factory is being taken the photograph
The region of test parsing power will do corresponding adjustment when as head shipment, and then lead to the region that parsing power is tested when the shipment of camera lens factory
Correspond to adjustment.Since the management and control region of every money camera and camera lens is different, cause module factory and camera lens factory from equipment to area
Domain management and control etc. can not be accomplished to normalize.
In order to solve this problem, the embodiment of the present application provides a kind of camera shooting header parsing power test pattern, by ISO12233
Vertical definition item and horizontal resolving power item in the test pattern used are adjusted to center focusing area as circular arc-shaped,
The parsing power test that one or more sections are carried out on a circular arc or on circumference avoids vertical definition item and horizontal solution picture
The problem of identical management and control region corresponds to different field ranges on power item.It realizes in a field range (i.e. management and control region),
As 0.3F is not necessarily to dollying to the effect that the camera of different parsing power is tested for the camera of different parsing power
Head is tested.Realize that, to terminal inner, the test pattern of different cameras is unified to be shared.For each test organization, (such as SQA/ is produced
Line/the laboratories QE) save graph card purchase cost and the test space (this graph card needs space arrangement).To external supplier, camera lens
Factory can fix test visual field (such as 0.3F is only surveyed at center) always, and camera module factory can also effective counterpart terminal difference module
Parsing the shipment mtf tests of the test zone and specification and camera lens factory of power also can effectively dock, and there is no because of camera lens factory/mould
Group factory/terminal same position has the problem of test zone deviation.In this way, can effectively unify the test pattern of camera, again
Can improve makes supplier, terminal test parse the correspondence of power, reduces normalization management and control difficulty, improves normalization management and control effect.
Fig. 2 is the structural schematic diagram of camera shooting header parsing power test pattern provided by the embodiments of the present application, images header parsing power
During test pattern is used to be detected the camera or camera lens of different parsing power, camera shooting header parsing power test pattern can
To fix on the wall or curtain of test site, test site further includes being used for fixing camera, or the shifting configured with camera
The holder of dynamic terminal, holder are fixed with the distance between wall or curtain.Imaging header parsing power test pattern includes：Center focusing
Area, the first visual field radial direction resolving power 2-1 and the tangential resolving power 2-2 of the first visual field；First visual field radial direction resolving power 2-1 and
The tangential resolving power 2-2 of first visual field is distributed using center focusing area as the center of circle in arc-shaped.
Center focusing area includes the TVline of two kinds of different distributions frequencies, and the TVline of two kinds of different distributions frequencies distinguishes shape
At semi-circular shape, the two both ends are connected with each other, the center of circle having the same.When test, be tested camera be based on center focusing area into
Row focusing.
The first visual field radial direction resolving power 2-1 and tangential resolving power 2-2 of the first visual field can be disposed adjacent excellent at one section
On arc, it can also be located on the non-conterminous minor arc in both ends.A first visual field Radial Solutions picture can be respectively set on circular arc
The power 2-1 and tangential resolving power 2-2 of first visual field.Optionally, at least two first can also be respectively set on circular arc
The visual field radial direction resolving power 2-1 and tangential resolving power 2-2 of at least two the first visual fields.At this point, the first visual field radial direction resolving power
The 2-1 and tangential resolving power 2-2 of the first visual field is intervally arranged.Illustratively, when being provided with two first visual field Radial Solutions pictures
When the power 2-1 and tangential resolving power 2-2 of two the first visual fields, in the clockwise direction or counterclockwise on regarded according to for secondary first
Radial tangential the first visual fields of resolving power b1- radial direction resolving power the first visual fields of a2- of resolving power the first visual fields of a1- in field tangentially solve
Image force b2.
In one implementation, the first visual field radial direction resolving power 2-1 and the tangential resolving power 2-2 of the first visual field are in
Centre focusing area is the center of circle, is distributed in arc-shaped, including：First visual field radial direction resolving power 2-1 and the tangential resolving power of the first visual field
2-2 is using center focusing area as the center of circle, distribution in rounded shape.
At this point, circular arc is circle, the first visual field radial direction resolving power 2-1 and the tangential resolving power 2-2 head and the tail of the first visual field
Connect, when being provided with multiple first visual field radial direction resolving power 2-1 and the tangential resolving power 2-2 of the first visual field, interval setting
The first visual field radial direction resolving power 2-1 and tangential resolving power 2-2 of the first visual field.
Further, the multiple first visual field radial direction resolving power 2-1 or tangential resolving power 2-2 of multiple first visual fields,
The same resolving power section can be corresponded to.Alternatively, being that each first visual field radial direction resolving power 2-1 or the first visual field tangentially solve picture
A resolving power section is arranged in power 2-2, realizes that N number of first visual field radial direction resolving power 2-1 corresponds to N number of resolving power section, N is
Integer more than 1.
In another implementation, the first visual field radial direction resolving power 2-1 and tangential resolving power 2-2 of the first visual field with
Center focusing area is the center of circle, is distributed in arc-shaped, including：First visual field radial direction resolving power 2-1 and the first visual field tangentially solve picture
Power 2-2 is symmetrical in arc-shaped using center focusing area as the center of circle.
When circular arc is round, the first visual field radial direction resolving power 2-1 and the tangential resolving power 2-2 of the first visual field are with circle
It is symmetrical arranged for symmetric points.When circular arc is major arc or minor arc, the first visual field radial direction resolving power 2-1 and the first visual field tangentially solve
Image force 2-2 is arranged with arcuate midway point mirror symmetry.
Further, the first visual field radial direction resolving power 2-1 and tangential resolving power 2-2 of the first visual field is with center focusing area
For the center of circle, it is distributed in arc-shaped, including：First visual field radial direction resolving power 2-1 and the tangential resolving power 2-2 of the first visual field are in
Centre focusing area is the center of circle, is in that arc-shaped is distributed in default circular trace, and it is with center focusing district center point to preset circular trace
The circle determined with four vertex of camera shooting header parsing power test pattern and preset ratio, preset ratio are less than 1.
Wherein, preset ratio can be 0.3,0.6 or 0.8 using center focusing area as zero, with image header parsing power test
The vertex of graph card is 1F.Tri- references of 0.3F, 0.6F and 0.8F are determined on the diagonal line of camera shooting header parsing power test pattern
Point.Based on each reference point using center focusing area as the center of circle, the corresponding concentric circles B of construction 0.3F corresponding concentric circles A, 0.6F and
The corresponding concentric circles C of 0.8F.First visual field radial direction resolving power 2-1 and the tangential resolving power 2-2 settings of the first visual field are existed
On the corresponding concentric circles A of 0.3F.
In one implementation, the vertical definition item in the test pattern that ISO12233 can be used and horizontal solution
Image force item carries out deformation process, its linear type shape is adjusted to arc shape, obtains the first visual field radial direction resolving power article 2-1 or the
The tangential resolving power 2-2 of one visual field.
In another implementation, the first visual field radial direction resolving power 2-1 and the tangential resolving power 2-2 of the first visual field be also
It can be made of multiple smaller subsolution image force items (the radial resolving power item of the first son or the tangential resolving power item of the first son).It is exemplary
, the first visual field radial direction resolving power 2-1, including：The continuous radial resolving power item of first son of multistage, the first tangential resolving power of son
Item is decomposed by horizontal resolving power item, and each tangential resolving power item of first son is directed toward center focusing area.First visual field tangentially solves
Image force 2-2, including：The continuous tangential resolving power item of first son of multistage, the tangential resolving power item of the first son is by vertical definition item
It decomposes, each tangential resolving power direction of first son is identical as a circular tangential direction where circular arc.
For camera when being tested, visual field is border circular areas, can recognize that the radial direction of visual field according to visual field and regards
The tangential direction of field, and then can more quickly realize parsing power detection.
First visual field radial direction resolving power 2-1 and the tangential resolving power 2-2 of the first visual field can correspond to identical resolving power
Section.Illustratively, the first visual field radial direction resolving power 2-1 and the corresponding resolving power areas the tangential resolving power 2-2 of the first visual field
Between be 10W~40W.Due to smart mobile phone, the resolution ratio of camera is usually less than 10W in the mobile terminals such as wearable device,
Therefore one resolving power can be only set on the first visual field radial direction resolving power 2-1 and the tangential resolving power 2-2 of the first visual field
Section.
But when being configured with the camera in other resolving power sections in mobile terminal, need to expand detectable solution picture
Power section.Further, the first visual field radial direction resolving power 2-1 and the tangential resolving power 2-2 of the first visual field correspond at least two
Resolving power section.
Illustratively, the first visual field radial direction resolving power 2-1 has 2, corresponding resolving power section 10W~40W and
14W~20W.Meanwhile first the tangential resolving power 2-2 of visual field have 2, corresponding resolving power section 10W~40W and 14W
~20W.
At this point it is possible to which a plurality of resolving power item is arranged on 0.6F concentric circles.Or it is every by reducing on 0.3F concentric circles
The display scale of a resolving power item, the brush to improve the resolving power item shown on 0.3F concentric circles are led.And then it realizes in camera
While position is constant, more resolving power sections are detected.
As shown in Fig. 2, the corresponding vertical definition items of 10W~40W in the test pattern that ISO12233 can be used
It is set as the first visual field radial direction resolving power 2-1 and the tangential resolving power 2-2 of the first visual field with horizontal resolving power item.At this point, 4W
The corresponding vertical definition items of~20W and horizontal resolving power item are not converted into arc-shaped resolving power item.Further, it also wraps
It includes：Second visual field radial direction resolving power item and the tangential resolving power item of the second visual field.Wherein, the second visual field radial direction resolving power item and second
The tangential resolving power item of visual field is distributed, the first of the first visual field radial direction resolving power 2-1 using center focusing area as the center of circle in arc-shaped
Average resolving power is more than the second average resolving power of the second visual field radial direction resolving power item.
Second visual field radial direction resolving power item and the tangential resolving power item of the second visual field correspond to the test pattern of 4W~20W.
Further, circular arc where the first visual field radial direction resolving power 2-1 and tangential resolving power 2-2 of the first visual field corresponds to
The first radius, circular arc where being less than the second visual field radial direction resolving power item and the tangential resolving power item of the second visual field corresponding the second half
Diameter.
Second visual field radial direction resolving power item and the tangential resolving power item of the second visual field can be set on 0.6F concentric circles B.
It can be between 0.3F and 0.6F, as the second visual field radial direction resolving power item and the second visual field is arranged on the corresponding concentric circles of 0.45F
Tangential resolving power item.The set-up mode and the first visual field diameter of second visual field radial direction resolving power item and the tangential resolving power item of the second visual field
It is identical to resolving power 2-1 and the tangential resolving power 2-2 of the first visual field, it specifically can refer to the setting side of above-described embodiment description
Case.
Further, the second visual field radial direction resolving power item and the corresponding resolving power section phase of the tangential resolving power item of the second visual field
Together, the first visual field radial direction resolving power 2-1 and the corresponding resolving power sections the tangential resolving power 2-2 of the first visual field are identical.
When the pattern in identical resolving power section is arranged on the same concentric circles or circular arc, camera can be in focusing
Behind the focusing area of centre, the detection interval of different range is obtained by adjusting focal length, and then realize to being set on different concentric circles or circular arc
The identical resolving power section set is identified, and completes the detection in multiple resolving power sections.
The camera shooting header parsing power test pattern provided in the embodiment of the present application is provided with the first visual field radial direction resolving power 2-
The 1 and first tangential resolving power 2-2 of visual field；And it is cut with arc-shaped the first visual field radial direction resolving power 2-1 of distribution and the first visual field
To resolving power 2-2, occurs identical resolving power mark when relative to setting vertical definition item and horizontal resolving power and be located at not
With resolving power section, cause that the camera of different pixels is needed to adjust test position, camera shooting header parsing provided by the present application
The the first visual field radial direction resolving power 2-1 and tangential resolving power 2-2 of the first visual field is arranged with arc-shaped, in turn in power test pattern
In the round visual field of camera, the mark of different resolving powers can be identified along the direction of mirror image and tangential direction of round visual field
Know.It realizes on a circular arc or circumference comprising multiple resolving powers test mark, when measuring the camera of different parsing power, nothing
Camera position need to be adjusted can detect the corresponding resolving power segment of different parsing power on circular arc, and then complete parsing power
Test puies forward the stability of high parsing power test.Realize that, to terminal inner, the test pattern of different cameras is unified to be shared.It is each
Test organization is (such as：Software quality assurance SQA, producing line and the laboratories quality engineering QE) save graph card purchase cost and the test space
(this graph card needs space arrangement).To external supplier, camera lens factory can fix test visual field (such as 0.3F is only surveyed at center) always,
Camera module factory can also the effectively test zone and specification and camera lens factory of counterpart terminal difference module parsing power shipment
Mtf tests also can be docked effectively, and there is no have the problem of test zone deviation because of camera lens factory/module factory/terminal same position.
In this way, can effectively unify the test pattern of camera, but can improve makes supplier, terminal test parse the correspondence of power,
Normalization management and control difficulty is reduced, normalization management and control effect is improved.
Note that above are only preferred embodiment and the institute's application technology principle of the application.It will be appreciated by those skilled in the art that
The application is not limited to specific embodiment described here, can carry out for a person skilled in the art it is various it is apparent variation,
The protection domain readjusted and substituted without departing from the application.Therefore, although being carried out to the application by above example
It is described in further detail, but the application is not limited only to above example, in the case where not departing from the application design, also
May include other more equivalent embodiments, and scope of the present application is determined by scope of the appended claims.
Claims (10)
1. a kind of camera shooting header parsing power test pattern, which is characterized in that including：
Center focusing area, the first visual field radial direction resolving power item and the tangential resolving power item of the first visual field；
The first visual field radial direction resolving power item and the tangential resolving power item of first visual field focus area as the center of circle using the center,
It is distributed in arc-shaped.
2. camera shooting header parsing power test pattern according to claim 1, which is characterized in that the first visual field Radial Solutions picture
Power item and the tangential resolving power item of first visual field focus area as the center of circle using the center, are distributed in arc-shaped, including：
First visual field radial direction resolving power item and the tangential resolving power item of first visual field focus area as the center of circle, in circle using the center
Distribution of shapes.
3. camera shooting header parsing power test pattern according to claim 1, which is characterized in that the first visual field Radial Solutions picture
Power item and the tangential resolving power item of first visual field focus area as the center of circle using the center, are distributed in arc-shaped, including：
The first visual field radial direction resolving power item and the tangential resolving power item of first visual field focus area as the center of circle using the center,
It is symmetrical in arc-shaped.
4. camera shooting header parsing power test pattern according to claim 1, which is characterized in that the first visual field Radial Solutions picture
Power item, including：The continuous radial resolving power item of first son of multistage, the tangential resolving power item of the first son is by horizontal resolving power item point
It solves, each tangential resolving power item of first son is directed toward center focusing area.
5. camera shooting header parsing power test pattern according to claim 1, which is characterized in that first visual field tangentially solves picture
Power item, including：The continuous tangential resolving power item of first son of multistage, the tangential resolving power item of the first son is by vertical definition item point
It solves, each tangential resolving power direction of first son is identical as a circular tangential direction where the circular arc.
6. camera shooting header parsing power test pattern according to claim 1, which is characterized in that the first visual field Radial Solutions picture
Power item and the tangential resolving power item of first visual field focus area as the center of circle using the center, are distributed in arc-shaped, including：
The first visual field radial direction resolving power item and the tangential resolving power item of first visual field focus area as the center of circle using the center,
It is distributed in arc-shaped in default circular trace, the default circular trace is with central district center point and the camera of focusing
It parses four vertex of power test pattern and the circle of preset ratio determination, the preset ratio is less than 1.
7. camera shooting header parsing power test pattern according to claim 1, which is characterized in that further include：Second visual field is radial
Resolving power item and the tangential resolving power item of the second visual field；
The second visual field radial direction resolving power item and the tangential resolving power item of second visual field focus area as the center of circle using the center,
It is distributed in arc-shaped, the first average resolving power of the first visual field radial direction resolving power item is more than the second visual field Radial Solutions picture
The average resolving power of the second of power item.
8. camera shooting header parsing power test pattern according to claim 7, which is characterized in that the first visual field Radial Solutions picture
Corresponding first radius of circular arc where power item and the tangential resolving power item of first visual field, is less than the second visual field Radial Solutions picture
Corresponding second radius of circular arc where power item and the tangential resolving power item of second visual field.
9. camera shooting header parsing power test pattern according to claim 7, which is characterized in that the second visual field Radial Solutions picture
Power item and the corresponding resolving power section of the tangential resolving power item of the second visual field are identical, the first visual field radial direction resolving power item and first
The corresponding resolving power section of the tangential resolving power item of visual field is identical.
10. camera shooting header parsing power test pattern according to claim 1, which is characterized in that the first visual field Radial Solutions
Image force item and the tangential resolving power item of first visual field correspond at least two resolving power sections.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810730899.0A CN108646514B (en) | 2018-07-05 | 2018-07-05 | Camera resolution test chart |
Applications Claiming Priority (1)
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