CN110324596A - Clarity detection method and detection device - Google Patents
Clarity detection method and detection device Download PDFInfo
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- CN110324596A CN110324596A CN201910709543.3A CN201910709543A CN110324596A CN 110324596 A CN110324596 A CN 110324596A CN 201910709543 A CN201910709543 A CN 201910709543A CN 110324596 A CN110324596 A CN 110324596A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3179—Video signal processing therefor
- H04N9/3182—Colour adjustment, e.g. white balance, shading or gamut
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3191—Testing thereof
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Transforming Electric Information Into Light Information (AREA)
- Controls And Circuits For Display Device (AREA)
Abstract
The present invention discloses a kind of clarity detection method and detection device, the clarity detection method is applied to the clarity detection device of detection of projection devices, the clarity detection device includes acquisition unit and projection screen, the acquisition unit and the projection device are divided into the two sides of the projection screen, the clarity detection method includes: to control the projection device for projector, image projection to the projection screen, the projected image includes N number of black block, and N is positive integer；It controls the acquisition unit and acquires the first image, the first image includes the projected image；Determine the scanning area of the first image；The scanning area is scanned, determines the first clarity.The present invention provides a kind of clarity detection method and detection device, it is intended to solve in the prior art to detect the clarity of projection device ununified examination criteria, the low problem of the clarity detection accuracy of projection device.
Description
Technical field
The present invention relates to technical field of optical detection more particularly to a kind of clarity detection methods and detection device.
Background technique
In the prior art, the clarity of projected image is one of the important indicator of projection device performance, with the prior art
Development, the clarity of the projected picture of projection device is also higher and higher, to projection device projected picture carry out clarity
When detection, generalling use testing staff's subjectivity and detect, higher clarity will increase the detection difficulty of testing staff, and
Different testing staff is inconsistent to the testing result of product, big so as to cause detection error, the low problem of detection accuracy.
Summary of the invention
The present invention provides a kind of clarity detection method and detection device, it is intended to solve in the prior art to projection device
Clarity detects ununified examination criteria, the low problem of the clarity detection accuracy of projection device.
To achieve the above object, the invention proposes a kind of clarity detection method, the clarity detection method applications
In the clarity detection device of detection of projection devices, the clarity detection device includes acquisition unit and projection screen, described
Acquisition unit and the projection device are divided into the two sides of the projection screen, and the clarity detection method includes:
The projection device is controlled by projector, image projection to the projection screen, the projected image includes being set to first
N number of black block of visual field, N is positive integer；
It controls the acquisition unit and acquires the first image, the first image includes the projected image；
Determine the scanning area of the first image；
The scanning area is scanned, determines the first clarity.
Optionally, the control projection device is by projector, image projection to the projection screen, before further include:
Determine the first setting position of the black block.
Optionally, the first setting position of the determination black block, comprising:
Determine the visual field ratio of first visual field；
Obtain the first size and tilt angle of the black block；
According to the first size of the black block, the tilt angle and the visual field ratio, described first is determined
Position is set.
Optionally, the scanning area of the determining the first image, comprising:
Determine the first scan position of first visual field；
Obtain the second size of the scanning area；
According to first scan position and second size, the scanning area of the first image is determined.
Optionally, the first scan position of the determination first visual field, comprising:
Determine first length and second length in a second direction of the first image along first direction；
According to first length, second length and the visual field ratio, the described of first visual field is determined
First scan position.
Optionally, described that the scanning area is scanned, determine the first clarity, comprising:
The scanning area is scanned line by line, and calculates the contrast of current scan line；
The average value of the contrast of whole scan lines is calculated, and according to the determination of the contrast average value of whole scan lines
First clarity.
Optionally, the average value of the contrast for calculating whole scan lines, and it is flat according to the contrast of whole scan lines
Mean value determines first clarity, later further include:
Obtain corresponding first preset value of first visual field；
According to first clarity and first preset value, the clarity of the projection device is judged.
Optionally, described according to first clarity and first preset value, to the clarity of the projection device
Judged, comprising:
When first clarity is greater than or equal to first preset value, the projection device meets requirement；
When first clarity is less than first preset value, the projection device is unsatisfactory for requirement.
To achieve the above object, the application proposes a kind of clarity detection device, and the clarity detection device is for examining
The clarity of projection device is surveyed, the clarity detection device includes acquisition unit, projection screen and controller,
The projection screen is set between the projection device and the acquisition unit；
The projecting direction of the projection device is directed toward the projection screen；
It is directed toward the projection screen in the acquisition direction of the acquisition unit；
The projection screen is used to receive the projected image of the projection device；
The acquisition unit is used to receive the acquisition image on the projection screen；
The controller and the projection device and the acquisition unit communicate to connect, and execute as any of the above-described is real
Apply clarity detection method described in mode.
Optionally, the clarity detection device further includes color correction device, and the color correction device is set to the projection
Curtain is used to correct the color of the first image close to the side of the projection device, the color correction device.
In the technical solution that the application proposes, the clarity that the clarity detection method is applied to detection of projection devices is examined
Device is surveyed, the clarity detection device includes acquisition unit and projection screen, and the clarity detection method includes: control institute
Projection device is stated by projector, image projection to the projection screen, the first image, first figure are acquired by the acquisition unit
As including the projected image, by determining the scanning area of the first image, and the scanning area is scanned, and
First clarity is determined, by determining first clarity to the first image scanning, so that it is determined that the projection
The clarity of equipment avoids testing staff's subjectivity and detects to clarity, solves in the prior art to projection device
Clarity detects ununified examination criteria, the low problem of the clarity detection accuracy of projection device.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
The structure shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the structural schematic diagram of clarity detection device of the present invention；
Fig. 2 is the first image schematic diagram of one embodiment of clarity detection method of the present invention；
Fig. 3 is the flow diagram of one embodiment of clarity detection method of the present invention；
Fig. 4 is the flow diagram of the another embodiment of clarity detection method of the present invention；
Fig. 5 is the flow diagram of the another embodiment of clarity detection method of the present invention；
Fig. 6 is the flow diagram of the another embodiment of clarity detection method of the present invention；
Fig. 7 is the flow diagram of the another embodiment of clarity detection method of the present invention.
Drawing reference numeral explanation:
| Label | Title | Label | Title |
| 10 | Projection device | 30 | Color correction device |
| 20 | Projection screen | 40 | Acquisition unit |
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute is only used in the embodiment of the present invention
In explaining in relative positional relationship, the motion conditions etc. under a certain particular pose (as shown in the picture) between each component, if should
When particular pose changes, then directionality instruction also correspondingly changes correspondingly.
In addition, the description for being such as related to " first ", " second " in the present invention is used for description purposes only, and should not be understood as
Its relative importance of indication or suggestion or the quantity for implicitly indicating indicated technical characteristic.Define as a result, " first ",
The feature of " second " can explicitly or implicitly include at least one of the features.In the description of the present invention, " multiple " contain
Justice is at least two, such as two, three etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " connection ", " fixation " etc. shall be understood in a broad sense,
For example, " fixation " may be a fixed connection, it may be a detachable connection, or integral；It can be mechanical connection, be also possible to
Electrical connection；It can be directly connected, the connection inside two elements or two can also be can be indirectly connected through an intermediary
The interaction relationship of a element, unless otherwise restricted clearly.It for the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of above-mentioned term in the present invention.
It in addition, the technical solution between each embodiment of the present invention can be combined with each other, but must be general with this field
Based on logical technical staff can be realized, it will be understood that when the combination of technical solution appearance is conflicting or cannot achieve this
The combination of technical solution is not present, also not the present invention claims protection scope within.
The present invention provides a kind of optical property detection method and detection device.
Fig. 1 and Fig. 2 are please referred to, the clarity that the clarity detection method is applied to detection of projection devices 10 detects dress
It sets, the clarity detection device includes acquisition unit 40 and projection screen 20,
Wherein, the projecting direction of the projection device 10 is directed toward the projection screen 20, the acquisition of the acquisition unit 40
The projection screen 20 is directed toward in direction, and the projection screen 20 is translucent curtain, is set to 20 side of projection screen
The projected image that the projection device 10 projects, can be by the acquisition unit 40 from the other side of the projection screen 20
It is acquired.
The clarity detection method includes:
S100 controls the projection device 10 for projector, image projection to the projection screen 20, the projected image packet
N number of black block set on the first visual field is included, N is positive integer；
Wherein, the projected image refers to that the projection device 10 is projected on the image of the projection screen 20, the throwing
It include N number of black block in shadow image, specifically, the projected image is the figure being made of white pixel point and black pixel point
Picture, wherein the black block is made of black pixel point, by the white pixel point and the black pixel point, is determined
The contrast of the projected image, so that it is determined that the clarity of the projection device 10.
S200 controls the acquisition unit 40 and acquires the first image, and the first image includes the projected image；
Wherein, the first image refers to the collected acquisition figure including the projected image of the acquisition unit 40
Picture, specifically, the projection screen 20 is transparent curtain, the acquisition unit 40 is set to the separate described of the projection screen 20
The side of projection device 10, the projected image that the projection device 10 projects is by the acquisition unit 40 from the projection screen
The other side of cloth 20 receives.
S300 determines the scanning area of the first image；
Wherein, the scanning area is used to compare when indicating for carrying out clarity detection to the projection device 10
The scanning range for spending scanning, by determining the clear of the projection device 10 to degree of comparing scanning in the scanning area
Degree.
S400 is scanned the scanning area, determines the first clarity.
Wherein, first clarity is used to indicate the clarity of the projection device 10.
In the technical solution that the application proposes, the clarity detection method is applied to the clarity of detection of projection devices 10
Detection device, the clarity detection device include acquisition unit 40 and projection screen 20, and the clarity detection method includes:
The projection device 10 is controlled by projector, image projection to the projection screen 20, the first figure is acquired by the acquisition unit 40
Picture, the first image include the projected image, by determining the scanning area of the first image, and to the scanning area
Domain is scanned, and determines first clarity, by determining first clarity to the first image scanning, thus
The clarity for determining the projection device 10 avoids testing staff's subjectivity and detects to clarity, solves the prior art
In ununified examination criteria is detected to the clarity of projection device 10, the clarity detection accuracy of projection device 10 is low
Problem.
In some alternative embodiments, above-mentioned steps S100, before further include:
S50 determines the first setting position of the black block；
Specifically, can be set according to user to the projection during carrying out resolving power test to the projection device 10
Standby 10 requirement carries out resolving power test to the different visual fields of the projection device 10 respectively, subsequent clear in order to meet
Clear degree scanning requires, it is thus necessary to determine that the position of the black block in the projected image, to facilitate clarity detection dress
It sets and the clarity is calculated by the black block.
Referring to figure 3., in preferred embodiment, above-mentioned steps S50, comprising:
S51 determines the visual field ratio of first visual field；
Wherein, the visual field ratio is for indicating the projection device 10 field range to be tested, the visual field ratio
It is calculated by the ratio between visual field to be measured and entire field, the value range of the visual field ratio is greater than 0 and to be less than or wait
In 1 positive number, specifically, the visual field ratio can be 0.3,0.5 or 0.7, when the visual field ratio is 0.5, view to be measured
The length and width of field are 0.5 times of entire field.
S52 obtains the first size and tilt angle of the black block；
Wherein, the first size of the black block is used to indicate the size of the black block, the black block
Tilt angle is used to indicate the relative dip angle of the black block and the first image, specifically, the black block
For rectangle, the long axis direction of the black block and the angle of the first image vertical direction are 6-8 degree.
S53, according to the first size of the black block, the tilt angle and the visual field ratio, determine described in
First setting position.
Wherein, the black block is mainly used for when carrying out the sharpness computation, by the scanning area
The white pixel of black block and side point, determines the contrast of the first image, so that it is determined that the projection device 10
Clarity, specifically, the scanning area can include and only include when the clarity to the projection device 10 detects
One side of the black block facilitates the clarity detection device to calculate the clarity of the projection device 10.
Referring to figure 4., in some alternative embodiments, above-mentioned steps S300, comprising:
S310 determines the first scan position of first visual field；
Wherein, first scan position is used to indicate the position of the central point of the scanning area, specifically, described the
One scan position is located at the color switching position at the edge of the black block and the white pixel point of side.
S320 obtains the second size of the scanning area；
Wherein, second size is used to indicate the size of the scanning area, specifically, the scanning area is pros
Shape region, and the direction of the scanning area is consistent with the setting direction of the first image, thus to the scanning area
After the scanning of domain degree of comparing, user is facilitated to calculate and count contrast.
S330 determines the scanning area of the first image according to first scan position and second size
Domain.
Wherein, first scan position indicates the center of the scanning area, to scan described in second size Expressing
The size in region can be quasi- since the setting direction of the scanning area and the setting direction of the first image are identical
True is determined the scanning area.
Specifically, the center of the first image is located in first frame when the first image is rectangle
The intersection location of the midpoint vertical line of point vertical line and second frame is arranged described the when the first visual field ratio is 0.7
The length of central point on one image to edge point is L, then using the central point of the first image as starting point, along described the
Position of the central point of one image to the extending direction of edge point Jing Guo 0.7L length is the central point of the scanning area.
With reference to above embodiment, when the pre-set dimension of the scanning area is 20*20 pixel, the scanning area is
Centered on the central point of the scanning area, along the first direction to two sides extend 10 pixels, along the second direction to
The rectangular area that two sides extend 10 pixels is the scanning area.
In addition, usually being wrapped in the first image in order to which the different zones degree of comparing to first visual field calculates
Multiple scanning areas are included, multiple scanning areas are with the revenue centre of the first image symmetrically or with the first image
Setting substantially symmetrical about its central axis.
Referring to figure 5., in some alternative embodiments, above-mentioned steps S400, comprising:
S410 is scanned the scanning area line by line, and calculates the contrast of current scan line；
Wherein, the direction of the scan line is identical as the first direction.When the first image is black and white picture, institute
State black block edge can because the problem of clarity and there are the gray pixels regions that black and white are mixed to form, work as institute
When the size for stating scanning area is 20*20 pixel, the length of every scan line is 20 pixels, and width is 1 pixel, by sweeping to described
It retouches row to be scanned, determines the contrast of current scan line.
S420 calculates the contrast average value of whole scan lines, and is determined according to the contrast average value of whole scan lines
First clarity.
When the clarity in the scanning area is bigger, the frontier district of the black pixel point and the white pixel point
Domain is more obvious, and since the grey similarity for projecting unintelligible generation is fewer, when the clarity in the scanning area is smaller
When, the borderline region of the black pixel point and the white pixel point is more unobvious, and the number of the gray pixels point is more.
Specifically, after being scanned to whole scan lines in the scanning area, the contrast of the whole scan lines of confirmation institute is averaged
Value, when contrast average value is bigger, first clarity of the scanning area is bigger.
Fig. 6 is please referred to, in some alternative embodiments, above-mentioned steps S420, later further include:
S430 obtains corresponding first preset value of first visual field；
Wherein, first preset value is used to indicate the clarity Eligibility requirements of the projection device 10.
S440 carries out the clarity of the projection device 10 according to first clarity and first preset value
Judgement.
Specifically, when to the scanning area complete the clarity detection when, by first clarity with it is described
The comparison of first preset value determines the clarity situation of the projection device 10, when described the of the different scanning areas
When one clarity is all larger than or is equal to first preset value, the projection device 10 meets requirement.
In preferred embodiment, above-mentioned steps S440, comprising:
When first clarity is greater than or equal to first preset value, the projection device 10, which meets use, to be wanted
It asks；
When first clarity is less than first preset value, the projection device 10 is unsatisfactory for requirement.
Specifically, the projection device 10 meets when first clarity is greater than or equal to first preset value
Requirement.When first clarity is less than first preset value, the projection device 10 is unsatisfactory for requirement, and
And can determine that first clarity is less than the scanning area of first preset value, to facilitate testing staff subsequent
The projection device 10 is adjusted.
In some alternative embodiments, when need to confirm the first image different visual fields described first is clear
When spending, after first clarity for different visual fields is calculated, first clarity of different visual fields is determined
Maximum value, and using maximum first clarity as benchmark, first clarity of other visual fields is determined, in a specific implementation
In mode, resolving power test is carried out to the first visual field, the second visual field and third visual field of the projection device 10, wherein described
The visual field ratio of first visual field is 0.3, and the visual field ratio of second visual field is 0.5, and the visual field ratio of the third visual field is
0.7, first clarity of first visual field is 92, and first clarity of second visual field is 87, described the
First clarity of three visual fields is 78, when the first preset value of first visual field is 90, the first of second visual field
Preset value is 85, when the first preset value of the third visual field is 80, the clarity of first visual field and second visual field
Meet requirement, the clarity of the third visual field is unsatisfactory for requirement.
In another embodiment, when first visual field first clarity be 92, the institute of second visual field
Stating the first clarity is 87, when first clarity of the third visual field is 78, can to first visual field, described the
First clarity of two visual fields and the third visual field is normalized, and obtains the first clarity of respective visual field
Evaluation of estimate, then the first clarity evaluation of estimate of first visual field be 100, it is corresponding, second visual field it is described
First clarity evaluation of estimate is 94.6, and the first clarity evaluation of estimate of the third visual field is 84.8.Second visual field
It is calculated with the clarity of the third visual field according to the first default evaluation of estimate, in specific embodiment, setting described second
The default evaluation of estimate of the first of visual field is 90, and first preset value of the third visual field is 85, due to second visual field
The first clarity evaluation of estimate 94.6>90, the first clarity evaluation of estimate 84.8<85 of the third visual field, then institute
The clarity for stating the second visual field meets requirement, and the clarity of the third visual field is unsatisfactory for requirement.
To achieve the above object, the application proposes clarity detection device described in a kind of clarity detection device for detecting
The clarity of projection device 10, the clarity detection device include acquisition unit 40, projection screen 20 and controller,
The projection screen 20 is set between the projection device 10 and the acquisition unit 40；
The projecting direction of the projection device 10 is directed toward the projection screen 20；
It is directed toward the projection screen 20 in the acquisition direction of the acquisition unit 40；
The projection screen 20 is used to receive the projected image of the projection device 10；
The acquisition unit 40 is used to receive the acquisition image on the projection screen 20；
The controller and the projection device 10 and the acquisition unit 40 communicate to connect, and execute as any of the above-described
Clarity detection method described in item embodiment.
In some alternative embodiments, the clarity detection device further includes color correction device 30, the color
Corrector 30 is set to the projection screen 20 close to the side of the projection device 10, and the color correction device 30 is for correcting institute
State the color of the first image.Specifically, in carrying out clarity detection process, by then passing through to pair in the scanning area
It is detected than degree, therefore the color of the first image directly affects the testing result of the clarity detection.In the throwing
Shadow equipment 10 is by the projector, image projection and when the projection screen 20, since the projection screen 20 is there are color difference,
Therefore the color of the first image and the projected image that the acquisition unit 40 receives not can guarantee it is completely the same, it is logical
The Color Color corrector 30 is crossed, the projected image that the projection device 10 issues is after the color correction device 30
It is transmitted to the projection screen 20, facilitates the acquisition unit 40 that can collect the first image with Accurate color,
Guarantee the testing result accuracy of clarity detection.
In some alternative embodiments, the processor can be central processing unit (Central
Processing Unit, CPU), it can also be other general processors, digital signal processor (Digital Signal
Processor, DSP), it is specific integrated circuit (Application Specific Integrated Circuit, ASIC), existing
It is field programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic device, discrete
Door or transistor logic, discrete hardware components etc..General processor can be microprocessor or the processor can also
To be any conventional processor etc..
The memory can be the internal storage unit of equipment, such as the hard disk or memory of equipment.The memory
It can be the External memory equipment of equipment, such as the plug-in type hard disk being equipped in equipment, intelligent memory card (Smart Media
Card, SMC), secure digital (Secure Digital, SD) card, flash card (Flash Card) etc..Further, described to deposit
Reservoir can also both including equipment internal storage unit and also including External memory equipment.The memory by store it is described based on
Other programs and data needed for calculation machine program and equipment.The memory can be also used for temporarily storing exported or
The data that person will export.
It is apparent to those skilled in the art that for convenience of description and succinctly, only with above-mentioned each function
Can unit, module division progress for example, in practical application, can according to need and by above-mentioned function distribution by different
Functional unit, module are completed, i.e., the internal structure of described device is divided into different functional unit or module, more than completing
The all or part of function of description.Each functional unit in embodiment, module can integrate in one processing unit, can also
To be that each unit physically exists alone, can also be integrated in one unit with two or more units, it is above-mentioned integrated
Unit both can take the form of hardware realization, can also realize in the form of software functional units.In addition, each function list
Member, the specific name of module are also only for convenience of distinguishing each other, the protection scope being not intended to limit this application.Above system
The specific work process of middle unit, module, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
The above description is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all at this
Under the inventive concept of invention, using equivalent structure transformation made by description of the invention and accompanying drawing content, or directly/use indirectly
It is included in other related technical areas in scope of patent protection of the invention.
Claims (10)
1. a kind of clarity detection method, which is characterized in that the clarity detection method is applied to the clear of detection of projection devices
Clear degree detection device, the clarity detection device include acquisition unit and projection screen, the acquisition unit and the projection
Equipment is divided into the two sides of the projection screen, and the clarity detection method includes:
The projection device is controlled by projector, image projection to the projection screen, the projected image includes being set to the first visual field
N number of black block, N is positive integer；
It controls the acquisition unit and acquires the first image, the first image includes the projected image；
Determine the scanning area of the first image；
The scanning area is scanned, determines the first clarity.
2. clarity detection method as described in claim 1, which is characterized in that described to control the projection device for perspective view
As projection to the projection screen, before further include:
Determine the first setting position of the black block.
3. clarity detection method as claimed in claim 2, which is characterized in that the first of the determination black block sets
Seated position, comprising:
Determine the visual field ratio of first visual field；
Obtain the first size and tilt angle of the black block；
According to the first size of the black block, the tilt angle and the visual field ratio, first setting is determined
Position.
4. clarity detection method as described in claim 1, which is characterized in that the scanning area of the determining the first image
Domain, comprising:
Determine the first scan position of first visual field；
Obtain the second size of the scanning area；
According to first scan position and second size, the scanning area of the first image is determined.
5. clarity detection method as claimed in claim 4, which is characterized in that the first of determination first visual field is swept
Retouch position, comprising:
Determine first length and second length in a second direction of the first image along first direction；
According to first length, second length and the visual field ratio, described the first of first visual field is determined
Scan position.
6. clarity detection method as described in claim 1, which is characterized in that it is described that the scanning area is scanned,
Determine the first clarity, comprising:
The scanning area is scanned line by line, and calculates the contrast of current scan line；
The average value of the contrast of whole scan lines is calculated, and determines described first according to the contrast average value of whole scan lines
Clarity.
7. clarity detection method as claimed in claim 6, which is characterized in that the contrast for calculating whole scan lines
Average value, and first clarity is determined according to the contrast average value of whole scan lines, later further include:
Obtain corresponding first preset value of first visual field；
According to first clarity and first preset value, the clarity of the projection device is judged.
8. clarity detection method as claimed in claim 7, which is characterized in that it is described according to first clarity with it is described
First preset value judges the clarity of the projection device, comprising:
When first clarity is greater than or equal to first preset value, the projection device meets requirement；
When first clarity is less than first preset value, the projection device is unsatisfactory for requirement.
9. a kind of clarity detection device, which is characterized in that the clarity detection device is clear for detection of projection devices
Degree, the clarity detection device include acquisition unit, projection screen and controller,
The projection screen is set between the projection device and the acquisition unit；
The projecting direction of the projection device is directed toward the projection screen；
It is directed toward the projection screen in the acquisition direction of the acquisition unit；
The projection screen is used to receive the projected image of the projection device；
The acquisition unit is used to receive the acquisition image on the projection screen；
The controller and the projection device and the acquisition unit communicate to connect, and execute as claim 1-8 is any
Clarity detection method described in.
10. clarity detection device as claimed in claim 9, which is characterized in that the clarity detection device further includes face
Color corrector, the color correction device are set to the projection screen close to the side of the projection device, the color correction device
For correcting the color of the first image.
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| CN201910709543.3A CN110324596A (en) | 2019-07-30 | 2019-07-30 | Clarity detection method and detection device |
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| CN201910709543.3A CN110324596A (en) | 2019-07-30 | 2019-07-30 | Clarity detection method and detection device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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