CN109115783A - A kind of flash-point power measuring device and method - Google Patents
A kind of flash-point power measuring device and method Download PDFInfo
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- CN109115783A CN109115783A CN201810665092.3A CN201810665092A CN109115783A CN 109115783 A CN109115783 A CN 109115783A CN 201810665092 A CN201810665092 A CN 201810665092A CN 109115783 A CN109115783 A CN 109115783A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
- G01N2021/8887—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges based on image processing techniques
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Abstract
The invention proposes a kind of flash-point power measuring device and methods, wherein device includes pure color display screen, stationary fixture, sample to be tested, CCD camera and image processing system, wherein, the sample to be tested is fixed on pure color display screen center by stationary fixture；The CCD camera camera face pure color display screen center；The CCD camera is connect with image processing system, and for shooting flash-point image of the sample to be tested under solid background, described image processing system is used to calculate the power of flash-point image flash-point.The present invention characterizes the power of flash-point using sudden strain of a muscle degree, realizes the accurate measurement to sudden strain of a muscle degree size in easier, intuitive, effective method.
Description
Technical field
The present invention relates to photoelectric display technical field, especially a kind of flash-point power measuring device and method.
Background technique
Film has very important effect in display device, is divided into many kinds, and such as antireflection (AR) film is prevented
Dazzle (AG) film etc..With the continuous improvement that people pursue quality of the life, better display effect is that people are expected,
And film is the ring that wherein can not ignore.However, with the continuous application and the limitation of people's visual perception of film, flash-point
Problem also gradually causes everybody attention.Tiny flaw or unevenness of the flash-point from etching glass or film inside or surface
Even property.These defects or inhomogeneities cause incident light to be scattered strongly, therefore sample to be tested surface has under visual perception
The sparklet of one layer of flashing, these sparklets cause serious influence to display effect.In most cases, people mainly go back
It is the power that flash-point is judged according to visually, the result judged in this way has very strong subjectivity, and since human eye is differentiated
The limitation of rate cannot make accurate judgement sometimes.
Summary of the invention
The invention proposes a kind of flash-point power measuring device, simpler, intuitive, the effective method of utilization is realized
To the accurate judgement of flash-point power.
Realize technical solution of the invention are as follows: a kind of flash-point power measuring device, including pure color display screen, fixing clamp
Tool, sample to be tested, CCD camera and image processing system, wherein the sample to be tested is fixed on pure color by stationary fixture and shows
Display screen center；The CCD camera camera face pure color display screen center；The CCD camera and image processing system connect
It connects, for shooting flash-point image of the sample to be tested under solid background, described image processing system is for calculating the sudden strain of a muscle of flash-point image
The power of point.
Preferably, described image processing system calculates the strong and weak formula of flash-point are as follows:
Sp=Stdv (G [M, N])
Wherein, flash-point image pixel size is no more than the bounds of sample to be tested, and Sp indicates to dodge angle value, Stdv () table
Show calculating standard deviation, G [M, N] indicates the matrix of the pixel gray value of flash-point image M*N pixel size picture.
The invention also provides a kind of flash-point power measurement method, specific steps are as follows:
Step 1, building flash-point power measuring device；The flash-point power measuring device includes pure color display screen, fixing clamp
Tool, sample to be tested, CCD camera and image processing system, wherein the sample to be tested is fixed on pure color by stationary fixture and shows
Display screen center；The CCD camera camera face pure color display screen center；The CCD camera and image processing system connect
It connects, for shooting flash-point image of the sample to be tested under solid background, described image processing system is for calculating the sudden strain of a muscle of flash-point image
The power of point；
Step 3 is fixed on pure color display screen using uniform empty glass as sample to be tested, measures its sudden strain of a muscle degree Sp0；
Step 4, the position that sample to be tested is placed in sample to be tested, and fixed with stationary fixture；
Step 5, the flash-point figure that sample to be tested is shot using CCD camera, and the flash-point figure is transferred to image processing system,
Calculate the size Sp of sudden strain of a muscle degree；
Step 6 utilizes Sp0School zero is carried out to the sudden strain of a muscle degree of sample to be tested, obtains the sudden strain of a muscle degree Sp of sample to be testedIt surveys。
Compared with prior art, the present invention its remarkable advantage are as follows: 1) present invention directly shoots flash-point with camera, eliminates and holds
Carry influence of the screen to measurement accuracy；2) present invention extracts information to characterize the power of flash-point, more directly from flash-point figure
It sees, effectively；3) Instrumental design of the present invention is simple, easy to operate, and using the light of display screen as bias light, is more in line with
The judgement of human eye；4) in the present invention in the case where not changing measuring condition, the sudden strain of a muscle degree repeatability that same sample repeatedly measures is high；
5) present invention carries out school zero to sample to be tested by uniform empty glass, removes influence of the display screen itself to measurement result.
Further detailed description is done to the present invention with reference to the accompanying drawing.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of flash-point power measuring device of the present invention.
Fig. 2 is the 200*200 flash-point figure of 1 five samples of the embodiment of the present invention.
Fig. 3 is three-dimensional distribution map of the grey scale pixel value of 1 five sample flash-point figures of the embodiment of the present invention under the observation of side.
Fig. 4 is the relational graph of 1 five corresponding Sp of sample of the embodiment of the present invention.
Specific embodiment
As shown in Figure 1, a kind of flash-point power measuring device, which is characterized in that including pure color display screen 1, stationary fixture 2,
Sample to be tested 3, CCD camera 4 and image processing system 5, wherein the sample to be tested 3 is fixed on pure by stationary fixture 2
1 center of color display screen；4 camera face pure color display screen of CCD camera, 1 center；At the CCD camera 4 and image
Reason system 5 connects, and for shooting flash-point image of the sample to be tested 3 under solid background, described image processing system 5 is for calculating
The power of flash-point image flash-point.
In further embodiment, described image processing system 5 calculates the strong and weak formula of flash-point are as follows:
Sp=Stdv (G [M, N])
Wherein, flash-point image pixel size is no more than the bounds of sample to be tested, and Sp indicates to dodge angle value, Stdv () table
Show calculating standard deviation, G [M, N] indicates the matrix of the pixel gray value of flash-point image M*N pixel size picture.
In further embodiment, the calculation formula of the flash-point gray value of image of the M*N pixel size are as follows:
Y=0.299*R+0.587*G+0.114*B
Wherein, Y is gray value, and value range is [0,255], and R, G, B are respectively the color in three channels of red, green, blue.
In further embodiment, the pure color display screen 1, stationary fixture 2, sample to be tested 3, CCD camera 4 are placed in camera bellows
In.
In further embodiment, the pure color display screen 1 is pure green display screen.
The course of work of flash-point power measuring device of the present invention are as follows:
Sample to be tested is fixed on pure green display screen center with stationary fixture, display screen power supply is connected and keeps display screen
Brightness is constant, is transferred to image processing system with the flash-point image that CCD camera takes sample, calculates sudden strain of a muscle degree size.
A kind of flash-point power measurement method, specific steps are as follows:
Step 1, building flash-point power measuring device；The flash-point power measuring device includes pure color display screen 1, fixing clamp
Tool 2, sample to be tested 3, CCD camera 4 and image processing system 5, wherein the sample to be tested 3 is fixed on by stationary fixture 2
1 center of pure color display screen；4 camera face pure color display screen of CCD camera, 1 center；The CCD camera 4 and image
Processing system 5 connects, and for shooting flash-point image of the sample to be tested 3 under solid background, described image processing system 5 is based on
Calculate the power of flash-point image flash-point；
Step 3 is fixed on pure color display screen 1 using uniform empty glass as sample to be tested 3, measures its sudden strain of a muscle degree Sp0；
Step 4, the position that sample to be tested is placed in sample to be tested 3, and it is fixed with stationary fixture 2；
Step 5, the flash-point figure that sample to be tested is shot using CCD camera 4, and the flash-point figure is transferred to image processing system
5, calculate the size Sp of sudden strain of a muscle degree；
Step 6 utilizes Sp0School zero is carried out to the sudden strain of a muscle degree of sample to be tested, obtains the sudden strain of a muscle degree Sp of sample to be testedIt surveys.Below with reference to
Embodiment is described in more detail.
In further embodiment, school zero, specific formula for calculation are carried out to the sudden strain of a muscle degree of sample to be tested in step 6 are as follows:
SpIt surveys=Sp-Sp0
Wherein, SpIt surveysAngle value is dodged for the standard of sample to be tested, Sp is to be measured directly to measure using flash-point power measuring device
The sudden strain of a muscle angle value of sample, Sp0Sudden strain of a muscle angle value for the empty glass directly measured using flash-point power measuring device.
In further embodiment, image processing system 5 calculates the formula of sudden strain of a muscle degree size are as follows:
Sp=Stdv (G [M, N])
Wherein, flash-point image pixel size is no more than the bounds of sample to be tested, and Sp indicates to dodge angle value, Stdv () table
Show calculating standard deviation, G [M, N] indicates the matrix of the pixel gray value of flash-point image M*N pixel size picture.
Embodiment 1
As shown in connection with fig. 2, in the present embodiment, five glare proof glass samples for containing different degrees of flash-point is chosen, are beaten
Open pure green display screen 1, five samples be successively fixed at sample to be tested 3 with stationary fixture 2, using CCD camera 4 clap five
The different flash-point figure of width is transferred to image processing system 5 and is handled.
As shown in connection with fig. 3, the fluctuation range of the picture gray value of different samples is different, and flash-point is stronger, wave above and below gray value
Dynamic amplitude is bigger.We judge its fluctuation size by calculating the standard deviation of its gray value, and this standard deviation is made
For its sudden strain of a muscle degree Sp.Calculation formula specifically: Sp=Stdv (G [200,200]) calculated result such as table 1.
Table 1
| Sample number into spectrum | 1 | 2 | 3 | 4 | 5 |
| Sp | 13.1218 | 11.6451 | 10.7125 | 8.8021 | 7.5505 |
As can be seen from Table 1, sample flash-point is stronger, and the standard deviation calculated is bigger, i.e., Sp is bigger.
In the present invention, school zero will be carried out using uniform empty glass and handled, the sudden strain of a muscle of sky glass is measured with device shown in Fig. 2
Spend Sp0It is 3.6726.Utilize formula S pIt surveys=Sp-Sp0, the standard sudden strain of a muscle degree of five samples is finally obtained, as shown in table 2.
Table 2
From table 2 it can be seen that Sp1 > Sp2 > Sp3 > Sp4 > Sp5, this and visually under flash-point power fit like a glove.It is corresponding
Curve is as shown in Figure 4.
Claims (8)
1. a kind of flash-point power measuring device, which is characterized in that including pure color display screen (1), stationary fixture (2), sample to be tested
(3), CCD camera (4) and image processing system (5), wherein the sample to be tested (3) is fixed on pure by stationary fixture (2)
Color display screen (1) center；CCD camera (4) camera face pure color display screen (1) center；The CCD camera (4)
It is connect with image processing system (5), for shooting flash-point image of the sample to be tested (3) under solid background, described image processing
System (5) is used to calculate the power of flash-point image flash-point.
2. flash-point power measuring device according to claim 1, which is characterized in that described image processing system (5), which calculates, dodges
The strong and weak formula of point are as follows:
Sp=Stdv (G [M, N])
Wherein, flash-point image pixel size is no more than the bounds of sample to be tested, and Sp indicates to dodge angle value, and Stdv () indicates to calculate
Standard deviation, G [M, N] indicate the matrix of the pixel gray value of flash-point image M*N pixel size picture.
3. flash-point power measuring device according to claim 2, which is characterized in that the flash-point image of the M*N pixel size
The calculation formula of gray value are as follows:
Y=0.299*R+0.587*G+0.114*B
Wherein, Y is gray value, and value range is [0,255], and R, G, B are respectively the color in three channels of red, green, blue.
4. flash-point power measuring device according to claim 1, which is characterized in that the pure color display screen (1), stationary fixture
(2), sample to be tested (3), CCD camera (4) are placed in camera bellows.
5. flash-point power measuring device according to claim 1, which is characterized in that the pure color display screen (1) is pure green
Display screen.
6. a kind of detection method based on flash-point power measuring device described in claim 1, which is characterized in that specific steps
Are as follows:
Step 1, building flash-point power measuring device；The flash-point power measuring device includes pure color display screen (1), stationary fixture
(2), sample to be tested (3), CCD camera (4) and image processing system (5), wherein the sample to be tested (3) passes through fixing clamp
Tool (2) is fixed on pure color display screen (1) center；CCD camera (4) camera face pure color display screen (1) center；Institute
CCD camera (4) is stated to connect with image processing system (5), for shooting flash-point image of the sample to be tested (3) under solid background,
Described image processing system (5) is used to calculate the power of flash-point image flash-point；
Uniform empty glass is fixed on pure color display screen (1) by step 3 as sample to be tested (3), measures its sudden strain of a muscle degree Sp0；
Step 4, the position that sample to be tested is placed in sample to be tested (3), and it is fixed with stationary fixture (2)；
Step 5, the flash-point figure that sample to be tested is shot using CCD camera (4), and the flash-point figure is transferred to image processing system
(5), the size Sp of sudden strain of a muscle degree is calculated；
Step 6 utilizes Sp0School zero is carried out to the sudden strain of a muscle degree of sample to be tested, obtains the sudden strain of a muscle degree Sp of sample to be testedIt surveys。
7. measuring the detection method of flash-point power according to claim 6, which is characterized in that sample to be tested in step 6
Sudden strain of a muscle degree carries out school zero, specific formula for calculation are as follows:
SpIt surveys=Sp-Sp0
Wherein, SpIt surveysAngle value is dodged for the standard of sample to be tested, Sp is the sample to be tested directly measured using flash-point power measuring device
Sudden strain of a muscle angle value, Sp0Sudden strain of a muscle angle value for the empty glass directly measured using flash-point power measuring device.
8. measuring the detection method of flash-point power according to claim 7, which is characterized in that image processing system (5) calculates
The formula of sudden strain of a muscle degree size are as follows:
Sp=Stdv (G [M, N])
Wherein, flash-point image pixel size is no more than the bounds of sample to be tested, and Sp indicates to dodge angle value, and Stdv () indicates to calculate
Standard deviation, G [M, N] indicate the matrix of the pixel gray value of flash-point image M*N pixel size picture.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810665092.3A CN109115783A (en) | 2018-06-26 | 2018-06-26 | A kind of flash-point power measuring device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810665092.3A CN109115783A (en) | 2018-06-26 | 2018-06-26 | A kind of flash-point power measuring device and method |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6577756B1 (en) * | 1999-02-19 | 2003-06-10 | Dai Nippon Printing Co., Ltd. | Method and apparatus for quantitatively evaluating scintillation, antiglare film and method of producing the same |
| US9411180B2 (en) * | 2011-02-28 | 2016-08-09 | Corning Incorporated | Apparatus and method for determining sparkle |
-
2018
- 2018-06-26 CN CN201810665092.3A patent/CN109115783A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6577756B1 (en) * | 1999-02-19 | 2003-06-10 | Dai Nippon Printing Co., Ltd. | Method and apparatus for quantitatively evaluating scintillation, antiglare film and method of producing the same |
| US9411180B2 (en) * | 2011-02-28 | 2016-08-09 | Corning Incorporated | Apparatus and method for determining sparkle |
Non-Patent Citations (1)
| Title |
|---|
| 王海风 等: "防眩显示屏闪耀点的研究进展", 《液晶与显示》 * |
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Application publication date: 20190101 |