CN110232885A - A kind of brightness of display screen measurement method, system and terminal - Google Patents
A kind of brightness of display screen measurement method, system and terminal Download PDFInfo
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Abstract
The invention discloses a kind of brightness of display screen measurement method, system and terminals, method includes the following steps: S1: obtaining shooting image when display screen shows different grey menus under different operating distance, and calculate the luminance information of each shooting image；S2: calibration model of the display screen under different operating distance, different grayscale between corresponding brightness is established according to the luminance information of different shooting images；S3: shooting picture when display screen shows any grey menu under any operating distance is obtained, and calculates the first brightness value of the shooting picture；S4: the first brightness value of display screen is calibrated according to the operating distance, the grayscale value of grey menu and the calibration model, obtains correcting luminance value；This invention removes the deviations of the acquisition data of camera caused by the operating distance of display screen and grayscale value, the accuracy of camera capture are improved, to improve the accuracy of brightness of display screen colour measurement.
Description
Technical field
The invention belongs to field of display technology, more particularly, to a kind of brightness of display screen measurement method, system and end
End.
Background technique
Due to the difference of technique, processing procedure and raw material, inevitably will appear in the production process of flat-panel monitor
The difference of brightness and coloration.In order to manage quality, panel manufacturer can be to the display progress brightness and coloration produced
Measurement.The method of traditional measurement chroma luminance is: the equipment using CIE normal response curve is met, such as luminance meter, to tested surface
The spectrum of plate is integrated, and coloration and brightness value are obtained；This special equipment is higher to the measurement accuracy of brightness and color, but specially
The brightness value of one or several pixels can only be measured every time with equipment, it is inconvenient to use, in actual demand, generally require to measure
The coloration and brightness value of each pixel on display screen；Detection time length, low efficiency if using special equipment；In addition, this
Kind special equipment cost is often very high, is unable to large-scale popularization use.
Other than the special equipments such as luminance meter, face battle array colorimeter is also currently used for the normal of brightness of display screen colorimetric detection
With one of equipment；Face battle array colorimeter is that a integrated high-precision profession signal generator, normalized optical measuring instrument and control are adjusted
Software is saved in the chroma luminance measuring system of one；Compared with luminance meter, face battle array colorimeter the advantages of be that it can be disposable
The coloration and brightness value of each pixel on display screen are measured, therefore it is fast to detect speed；But there is also obvious for face battle array colorimeter
Defect, when detection shoots display image by area array CCD camera first, then calculates brightness and color value according to shooting image,
But due to the characteristics of luminescence of different display screens difference, CCD camera shooting image by operating distance and grey menu influenced compared with
Greatly, i.e., the display screen for brightness absolute uniform, the image that camera is shot under different operating distance is non-uniform；Same
The image brightness uniformity trend of camera shooting is also inconsistent under operating distance, different grey menus, causes area array CCD phase
Machine acquisition data have very large deviation, and subsequent brightness and color calculated result is caused deviation occur, influence the measurement essence of chroma luminance
Degree.
In conclusion existing chroma luminance measuring device there are problems that cannot be considered in terms of measurement accurate measurement and measurement efficiency.
Summary of the invention
For at least one defect or Improvement requirement of the prior art, the present invention provides a kind of brightness of display screen measurement sides
Method, system and terminal initially set up straightening die of the display screen under different operating distance, different grayscale between corresponding brightness
Type shoots brightness to camera by the calibration model and is corrected, eliminates the operating distance of display screen and the influence of grayscale value,
Improve the accuracy of brightness of display screen measurement；In addition, establish special inspecting equipment measurement brightness and it is calibrated after camera
Shoot the mapping relations model between brightness；Then the brightness value of the display screen shot camera according to the mapping relations model turns
It is changed to the brightness value with higher precision that special inspecting equipment measurement obtains；By the method, not only can once obtain aobvious
The brightness value of all pixels point in display screen, having which can also be converted to special inspecting equipment measurement obtains are higher
The brightness value of precision further improves measurement accuracy under the premise of guaranteeing detection efficiency；Its object is to solve existing skill
The problem of brightness of display screen chroma detection method in art cannot be considered in terms of detection efficiency and measurement accuracy.
To achieve the above object, according to one aspect of the present invention, a kind of brightness of display screen measurement method is provided, including
Following steps:
S1: shooting image when display screen shows different grey menus under different operating distance is obtained, and calculates each bat
Take the photograph the luminance information of image；
S2: according to the luminance informations of different shooting images establish display screen under different operating distance, different grayscale with it is corresponding bright
Calibration model between degree；
S3: shooting picture when display screen shows any grey menu under any operating distance is obtained, and calculates the shooting
First brightness value of picture；
S4: according to the operating distance, the grayscale value of grey menu and the calibration model to the first brightness value of display screen
It is calibrated, obtains correcting luminance value.
Preferably, above-mentioned brightness of display screen measurement method, further comprising the steps of:
S5: the second brightness of central area of the display screen of special inspecting equipment measurement when showing different grey menus is obtained
Value；According to second brightness value and correcting luminance value establish special inspecting equipment measurement brightness and it is calibrated after camera clap
Take the photograph the mapping relations model between brightness；
S6: it obtains the first brightness value of each pixel in the display picture of the display screen to be measured of camera shooting and passes through correction
Model is corrected, and obtains correcting luminance value；The correcting luminance value is converted into dedicated inspection according to the mapping relations model
The second brightness value that measurement equipment measures.
Preferably, above-mentioned brightness of display screen measurement method, which is characterized in that specifically included in step S2:
The brightness of the shooting image is normalized on the basis of the brightness value of the central area of different shooting images,
Multiple groups model parameter value after generating different grey menu brightness normalization of the different operating apart from lower display screen, generates straightening die
Type library.
Preferably, above-mentioned brightness of display screen measurement method, which is characterized in that specifically included in step S4:
Model parameter value corresponding with the operating distance, grey menu is searched in the calibration model library, according to the mould
Shape parameter value is corrected the first brightness value.
Preferably, above-mentioned brightness of display screen measurement method, which is characterized in that when in calibration model library be not present and the work
When making distance or the corresponding model parameter value of grey menu, using closest differential technique in calibration model library lookup and work at present
Apart from immediate distance value；Under the distance value, if there is model parameter value corresponding with the grey menu of display screen,
Then directly the first brightness value is corrected according to the model parameter value；If it does not exist, then searching adjacent with current gray value
The corresponding model parameter value of two grayscale values, current gray is then calculated using internal difference method and is worth corresponding model parameter value.
Preferably, above-mentioned brightness of display screen measurement method, which is characterized in that the mapping relations model are as follows:
L0=F(R0, G0, B0)
Wherein, (R0, G0, B0) be respectively image shot by camera central area under a certain picture R/G/B component；L0 is dedicated sets
The brightness of the central area of the same picture of standby measurement；F is abstract pattern function；
The calculation formula of the pattern function F are as follows: F=I-1* L
Wherein,, the R/G/B component of image shot by camera under respectively three different pictures；
, three parameters respectively represent special equipment measurement three pictures brightness value.
The second aspect according to the invention additionally provides a kind of brightness of display screen measuring system, including the first luminance meter
Calculate unit, the first model creating unit, the second luminance calculation unit and correction unit；
First luminance calculation unit is used to obtain bat when display screen shows different grey menus under different operating distance
Image is taken the photograph, and calculates the luminance information of each shooting image；
First model creating unit be used for according to it is different shooting images luminance informations establish display screen different operating away from
From the calibration model under, different grayscale between corresponding brightness；
Second luminance calculation unit is used to obtain bat when display screen shows any grey menu under any operating distance
Picture is taken the photograph, and calculates the first brightness value of the shooting picture；
The correction unit is used for according to the operating distance, the grayscale value of grey menu and the calibration model to display screen
The first brightness value calibrated, obtain correcting luminance value.
Preferably, above-mentioned brightness of display screen measuring system, which is characterized in that further include the second model creating unit and conversion
Unit；
Second model creating unit is used to obtain the display screen of special inspecting equipment measurement when showing different colours picture
Central area the second brightness value；The measurement for establishing special inspecting equipment according to second brightness value and correcting luminance value is bright
The mapping relations model between camera shooting brightness after spending and being calibrated；
The converting unit is for being converted to correcting luminance value of the display screen after calibrated specially according to the mapping relations model
The second brightness value obtained with detection device measurement.
Preferably, above-mentioned brightness of display screen measuring system, which is characterized in that first model creating unit is specifically used
In: by it is different shooting images central areas brightness value on the basis of to it is described shooting image brightness be normalized,
Multiple groups model parameter value after generating different grey menu brightness normalization of the different operating apart from lower display screen, generates straightening die
Type library.
Preferably, above-mentioned brightness of display screen measuring system, which is characterized in that the correction unit is specifically used for: described
Model parameter value corresponding with the operating distance, grey menu is searched in calibration model library, according to the model parameter value pair
First brightness value is corrected.
Preferably, above-mentioned brightness of display screen measuring system, which is characterized in that when in calibration model library be not present and the work
When making distance or the corresponding model parameter value of grey menu, correction unit uses differential technique computation model parameter value.
Preferably, above-mentioned brightness of display screen measuring system, which is characterized in that the mapping relations model are as follows:
L0=F(R0, G0, B0)
Wherein, (R0, G0, B0) be respectively image shot by camera central area under a certain picture R/G/B component；L0 is dedicated sets
The brightness of the central area of the same picture of standby measurement；F is abstract pattern function；
The calculation formula of the pattern function F are as follows: F=I-1* L
Wherein,, the R/G/B component of image shot by camera under respectively three different pictures；
, three parameters respectively represent special equipment measurement three pictures brightness value.
In terms of third according to the invention, a kind of terminal, including processor and memory, the memory are additionally provided
In be stored with computer program, can be realized described in any of the above-described when the computer program is called and executed by the processor
Method.
In general, through the invention it is contemplated above technical scheme is compared with the prior art, can obtain down and show
Beneficial effect:
(1) a kind of brightness of display screen measurement method, system and terminal provided by the invention, first against the characteristics of luminescence of display screen
Construct calibration model of the display screen under different operating distance, different grayscale between corresponding brightness, the models fitting precision
Height, it is preferable to the practical coloration and brightness reproducibility of display screen, it can preferably reflect under different operating distance, grey menu and show
The luminous intensity of display screen；Then corresponding bright according to real work distance and grey menu of the calibration model of building to display screen
Angle value is corrected, and is eliminated the deviation of the acquisition data of camera caused by display screen operating distance and grayscale value significantly, is improved
The accuracy of camera capture, to improve the accuracy of brightness of display screen colour measurement；
(2) a kind of brightness of display screen measurement method, system and terminal provided by the invention, are corrected the shooting brightness of camera
After obtaining correcting luminance value, the second brightness value and the correcting luminance value obtained according to special inspecting equipment measurement establishes dedicated inspection
Measurement equipment measurement brightness and it is calibrated after camera shooting brightness between mapping relations model；Then according to the mapping relations
The brightness value for the display screen that camera is shot is converted to the second brightness value that special inspecting equipment measurement obtains by model；Pass through this side
Method not only can once obtain the brightness value of all pixels point on display screen, the brightness value can also be converted to dedicated test
The brightness value with higher precision that device measuring obtains further improves measurement essence under the premise of guaranteeing detection efficiency
Degree；
(3) a kind of brightness of display screen measurement method, system and terminal provided by the invention, it is easy to use, versatility is preferable, only need
The calibration model and mapping relations model being pre-created are loaded in CCD shooting；
(4) a kind of brightness of display screen measurement method, system and terminal provided by the invention, using the method for building model certain
The somewhat complex design that hardware is avoided in degree has saved the input cost and maintenance cost of hardware, keeps product excellent with more competing
Gesture；While guaranteeing brightness and color measurement accuracy, also have that hardware cost is lower, the stronger effect of practicability.
Detailed description of the invention
Fig. 1 is the flow chart of the first brightness of display screen measurement method provided in an embodiment of the present invention；
Fig. 2 is the flow chart of second of brightness of display screen measurement method provided in an embodiment of the present invention；
Fig. 3 is the logic diagram of brightness of display screen measuring system provided in an embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
Not constituting a conflict with each other can be combined with each other.
Fig. 1 is the flow chart of the first brightness of display screen measurement method provided by the present embodiment, as shown in Figure 1, the party
Method the following steps are included:
S1: shooting image when display screen shows different grey menus under different operating distance is obtained, and calculates each bat
Take the photograph the luminance information of image；
In this step, the position of fixed camera and display screen distinguishes display screen to display screen transmission gray scale image signal first
Show different grey menus；Grey menu number is unlimited, and the precision of the calibration model of the more generations of the quantity of grey menu is more
It is high；Shooting image when showing different grey menus under work at present distance using camera shooting display screen, and calculate each
Open the luminance information of shooting image；
S2: according to the luminance informations of different shooting images establish display screen under different operating distance, different grayscale with it is corresponding bright
Calibration model between degree；It is specific:
The image of above-mentioned different grey menus is normalized on the basis of center, obtains work at present apart from lower different grayscale
Model parameter value after picture brightness normalization；
The operating distance of camera is adjusted, above-mentioned two step is repeated, obtains multiple groups model parameter value composition calibration model library；Work
Distance determines that in general, the setting of operating distance ensures to show according to size accounting of the display screen in image shot by camera
Screen is in the accounting in image shot by camera between 1/10 to 1；
S3: shooting picture when display screen shows any grey menu under any operating distance is obtained, and calculates shooting picture
The first brightness value；
S4: being corrected according to the first brightness value of operating distance, the grayscale value of grey menu and calibration model to display screen,
Obtain correcting luminance value.
Corresponding with above-mentioned operating distance, grey menu model parameter value is searched in calibration model library, according to finding
Model parameter value the first brightness value is corrected；When in calibration model library be not present and the operating distance or grey menu
When corresponding model parameter value, using differential technique computation model parameter value；Specifically, being corrected first using closest differential technique
Model library lookup and work at present are apart from immediate distance value；Under the distance value, drawn if there is with the grayscale of display screen
The corresponding model parameter value in face is then directly corrected the first brightness value according to the model parameter value；If it does not exist, then looking into
It looks for and is worth the corresponding model parameter value of two adjacent grayscale values with current gray, current gray value pair is then calculated using internal difference method
The model parameter value answered.
The present embodiment proposes brightness of display screen measurement method, constructs display screen first against the characteristics of luminescence of display screen
Calibration model under different operating distance, different grayscale between corresponding brightness, the models fitting precision is high, to display screen
Practical coloration and brightness reproducibility are preferable, can preferably reflect the strong light of display screen under different operating distance, grey menu
Degree；Then school is carried out according to real work distance and grey menu corresponding brightness value of the calibration model of building to display screen
Just, the deviation for eliminating the acquisition data of CCD camera caused by display screen light emitting angle significantly, improves the standard of CCD camera capture
True property, to improve the accuracy of brightness of display screen colour measurement.
Fig. 2 is the flow chart of second of brightness of display screen measurement method provided in an embodiment of the present invention；As shown in Fig. 2,
It obtains further comprising the steps of after the correcting luminance value of display screen:
S5: the second brightness of central area of the display screen of special inspecting equipment measurement when showing different colours picture is obtained
Value；According to the second brightness value and correcting luminance value obtained in step S4 establish the measurement brightness of special inspecting equipment with it is calibrated
The mapping relations model between camera shooting brightness afterwards；
Display screen measures the second brightness of the central area of display screen by special inspecting equipment when showing different colours picture
Value；In the present embodiment, special inspecting equipment is luminance meter, and the size of central area depends on the probe area of luminance meter；Probe
Area is bigger, and central area is also bigger；In addition, choosing the correcting luminance value and second of an equal amount of central area on display screen
Brightness value establishes mapping relations model；
The expression formula of the mapping relations model are as follows:
L0 = F I0
I0 =(R0, G0, B0)
Wherein, L0Indicate second brightness value of the display screen in the central area for showing a certain colored picture of luminance meter measurement；F is
Abstract pattern function；I0After the compensated coefficient matrix correction of the first brightness value of the same picture central area of camera shooting
Corresponding correcting luminance value；RI0、GI0、BI0The R/G/B component of the central area of image shot by camera under respectively a certain picture；
The calculation formula of the pattern function F are as follows: F=I-1* L
Wherein,, R/G/B points of the central area of image shot by camera under respectively three different pictures
Amount；, three parameters respectively represent luminance meter measurement three pictures brightness value.
S6: it obtains the first brightness value of each pixel in the display picture of the display screen of camera shooting and passes through correction
Model is corrected, and obtains correcting luminance value；The correcting luminance value of display screen is turned according to the mapping relations model in step S5
It is changed to the second brightness value that special inspecting equipment measurement obtains；
During actual measurement, the display picture of display screen is shot by camera first, then calculates each picture in picture
First brightness value of vegetarian refreshments disposably measures the brightness of all pixels point on display screen；Then by calibration model to first
Brightness value is corrected, and eliminates the operating distance of display screen and the influence of grayscale value；Specific correction course as described in S2-S4,
Details are not described herein again；After obtaining the correcting luminance value of display screen, due to the essence for the brightness value for passing through image shot by camera and calculating
Degree is therefore, bright by the correction using the mapping relations model pre-established lower than the brightness that luminance meter is detected by single-point
Angle value is converted to the brightness value that special inspecting equipment is obtained by spot measurement；By the method, not only can once obtain aobvious
The brightness value of all pixels point in display screen, having which can also be converted to special inspecting equipment measurement obtains are higher
The brightness value of precision further improves measurement accuracy under the premise of guaranteeing detection efficiency.
The present embodiment additionally provides a kind of brightness of display screen measuring system, and Fig. 3 is patrolling for the brightness of display screen measuring system
Collect block diagram, including the first luminance calculation unit, the first model creating unit, the second luminance calculation unit and correction unit；
Wherein, the first luminance calculation unit is used to obtain bat when display screen shows different grey menus under different operating distance
Image is taken the photograph, and calculates the luminance information of each shooting image；
Grey menu number is unlimited, and the precision of the calibration model of the more generations of the quantity of grey menu is higher；It is shot using camera
Shooting image when display screen shows different grey menus under work at present distance, the first luminance calculation unit obtain camera and clap
The image taken the photograph, and calculate the luminance information of each shooting image；
First model creating unit be used for according to it is different shooting images luminance informations establish display screen different operating distance, no
With the calibration model under grayscale between corresponding brightness；
Specific: the image of above-mentioned different grey menus is normalized in the first model creating unit on the basis of center, obtains
To model parameter value of the work at present after lower different grey menu brightness normalization；
The operating distance of camera is adjusted, the first model creating unit obtains multiple groups model parameter value composition calibration model library；Work
Distance determines that in general, the setting of operating distance ensures to show according to size accounting of the display screen in image shot by camera
Screen is in the accounting in image shot by camera between 1/10 to 1；
Second luminance calculation unit is used to obtain shooting picture when display screen shows any grey menu under any operating distance
Face, and calculate the first brightness value of the shooting picture；
Correct unit be used for according to above-mentioned operating distance, the grayscale value of grey menu and the calibration model to display screen the
One brightness value is corrected, and obtains correcting luminance value；It is specific:
Correction unit searches model parameter value corresponding with above-mentioned operating distance, grey menu in the calibration model library of creation,
The first brightness value is corrected according to the model parameter value found；When in calibration model library be not present and the operating distance
Or when the corresponding model parameter value of grey menu, correction unit uses differential technique computation model parameter value；Specifically, correction unit
Use closest differential technique in calibration model library lookup and work at present apart from immediate distance value first；In the distance value
Under, it is if there is model parameter value corresponding with the grey menu of display screen, then directly bright to first according to the model parameter value
Angle value is corrected；If it does not, correction unit is then searched and is worth the corresponding model of two adjacent grayscale values with current gray
Then parameter value calculates current gray using internal difference method and is worth corresponding model parameter value.
Further, above-mentioned brightness of display screen measuring system further includes the second model creating unit and converting unit；
Second model creating unit be used for obtain special inspecting equipment measurement display screen when showing different colours picture in
Second brightness value in heart district domain；Dedicated test is established according to the second brightness value correcting luminance value corresponding with above-mentioned central area to set
Standby measurement brightness and it is calibrated after camera shooting brightness between mapping relations model；
Display screen measures the second brightness value of the central area of display screen by luminance meter when showing different colours picture；In
The size in heart district domain depends on the probe area of luminance meter；Probe area is bigger, and central area is also bigger；In addition, choosing display
The correcting luminance value of an equal amount of central area and the second brightness value establish mapping relations model on screen；
The expression formula of the mapping relations model are as follows:
L0 = F I0
I0 =(R0, G0, B0)
Wherein, L0Indicate second brightness value of the display screen in the central area for showing a certain colored picture of luminance meter measurement；F is
Abstract pattern function；I0After the compensated coefficient matrix correction of the first brightness value of the same picture central area of camera shooting
Corresponding correcting luminance value；RI0、GI0、BI0The R/G/B component of the central area of image shot by camera under respectively a certain picture；
The calculation formula of the pattern function F are as follows: F=I-1* L
Wherein,, R/G/B points of the central area of image shot by camera under respectively three different pictures
Amount；, three parameters respectively represent luminance meter measurement three pictures brightness value.
Converting unit is for being converted to correcting luminance value of the display screen after calibrated specially according to above-mentioned mapping relations model
The second brightness value obtained with detection device measurement；
The present embodiment additionally provides a kind of terminal, which includes one or more processors and memory, stores in memory
There is computer program, the function of above-mentioned brightness and color calibration can be realized when which is called and executed by processor.Its
In, the type of processor and memory is not specifically limited, such as: processor can be microprocessor, digital information processor,
On piece programmable logic system etc.；Memory can be volatile memory, nonvolatile memory or their combination etc..
A kind of brightness of display screen measurement method, system and terminal provided by the invention, first against the luminous spy of display screen
Property construct calibration model of the display screen under different operating distance, different grayscale between corresponding brightness, models fitting essence
Degree is high, preferable to the practical coloration and brightness reproducibility of display screen, can preferably reflect under different operating distance, grey menu
The luminous intensity of display screen；Then corresponding according to real work distance and grey menu of the calibration model of building to display screen
Brightness value is corrected, and is eliminated the deviation of the acquisition data of camera caused by display screen operating distance and grayscale value significantly, is improved
The accuracy of camera capture, to improve the accuracy of brightness of display screen colour measurement.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (13)
1. a kind of brightness of display screen measurement method, which comprises the following steps:
S1: shooting image when display screen shows different grey menus under different operating distance is obtained, and calculates each bat
Take the photograph the luminance information of image；
S2: according to the luminance informations of different shooting images establish display screen under different operating distance, different grayscale with it is corresponding bright
Calibration model between degree；
S3: shooting picture when display screen shows any grey menu under any operating distance is obtained, and calculates the shooting
First brightness value of picture；
S4: according to the operating distance, the grayscale value of grey menu and the calibration model to the first brightness value of display screen
It is calibrated, obtains correcting luminance value.
2. brightness of display screen measurement method as described in claim 1, further comprising the steps of:
S5: the second brightness of central area of the display screen of special inspecting equipment measurement when showing different grey menus is obtained
Value；According to second brightness value and correcting luminance value establish special inspecting equipment measurement brightness and it is calibrated after camera clap
Take the photograph the mapping relations model between brightness；
S6: it obtains the first brightness value of each pixel in the display picture of the display screen to be measured of camera shooting and passes through correction
Model is corrected, and obtains correcting luminance value；The correcting luminance value is converted into dedicated inspection according to the mapping relations model
The second brightness value that measurement equipment measures.
3. brightness of display screen measurement method as claimed in claim 1 or 2, which is characterized in that specifically included in step S2:
The brightness of the shooting image is normalized on the basis of the brightness value of the central area of different shooting images,
Multiple groups model parameter value after generating different grey menu brightness normalization of the different operating apart from lower display screen, generates straightening die
Type library.
4. brightness of display screen measurement method as claimed in claim 3, which is characterized in that specifically included in step S4:
Model parameter value corresponding with the operating distance, grey menu is searched in the calibration model library, according to the mould
Shape parameter value is corrected the first brightness value.
5. brightness of display screen measurement method as claimed in claim 4, which is characterized in that when in calibration model library be not present and institute
When stating operating distance or the corresponding model parameter value of grey menu, using differential technique computation model parameter value.
6. brightness of display screen measurement method as claimed in claim 2, which is characterized in that the mapping relations model are as follows:
L0=F(R0, G0, B0)
Wherein, (R0, G0, B0) be respectively image shot by camera central area under a certain picture R/G/B component；L0 is dedicated sets
The brightness of the central area of the same picture of standby measurement；F is abstract pattern function；
The calculation formula of the pattern function F are as follows: F=I-1* L
Wherein,, respectively represent the R/G/B component of image shot by camera under three different pictures；, three parameters respectively represent special equipment measurement three pictures brightness value.
7. a kind of brightness of display screen measuring system, which is characterized in that including the first luminance calculation unit, the first model creation list
Member, the second luminance calculation unit and correction unit；
First luminance calculation unit is used to obtain bat when display screen shows different grey menus under different operating distance
Image is taken the photograph, and calculates the luminance information of each shooting image；
First model creating unit be used for according to it is different shooting images luminance informations establish display screen different operating away from
From the calibration model under, different grayscale between corresponding brightness；
Second luminance calculation unit is used to obtain bat when display screen shows any grey menu under any operating distance
Picture is taken the photograph, and calculates the first brightness value of the shooting picture；
The correction unit is used for according to the operating distance, the grayscale value of grey menu and the calibration model to display screen
The first brightness value calibrated, obtain correcting luminance value.
8. brightness of display screen measuring system as claimed in claim 7, which is characterized in that further include the second model creating unit and
Converting unit；
Second model creating unit is used to obtain the display screen of special inspecting equipment measurement when showing different colours picture
Central area the second brightness value；The measurement for establishing special inspecting equipment according to second brightness value and correcting luminance value is bright
The mapping relations model between camera shooting brightness after spending and being calibrated；
The converting unit is for being converted to correcting luminance value of the display screen after calibrated specially according to the mapping relations model
The second brightness value obtained with detection device measurement.
9. brightness of display screen measuring system as claimed in claim 7 or 8, which is characterized in that first model creating unit
It is specifically used for: the brightness of the shooting image is normalized on the basis of the brightness value of the central area of different shooting images
Processing, the multiple groups model parameter value after generating different grey menu brightness normalization of the different operating apart from lower display screen, generates
Calibration model library.
10. brightness of display screen measuring system as claimed in claim 9, which is characterized in that the correction unit is specifically used for:
Model parameter value corresponding with the operating distance, grey menu is searched in the calibration model library, according to the model parameter
Value is corrected the first brightness value.
11. brightness of display screen measuring system as claimed in claim 10, which is characterized in that when in calibration model library there is no with
When the operating distance or the corresponding model parameter value of grey menu, correction unit uses differential technique computation model parameter value.
12. brightness of display screen measuring system as claimed in claim 8, which is characterized in that the mapping relations model are as follows:
L0=F(R0, G0, B0)
Wherein, (R0, G0, B0) be respectively image shot by camera central area under a certain picture R/G/B component；L0 is dedicated sets
The brightness of the central area of the same picture of standby measurement；F is abstract pattern function；
The calculation formula of the pattern function F are as follows: F=I-1* L
Wherein,, the R/G/B component of image shot by camera under respectively three different pictures；,
Three parameters respectively represent the brightness value of three pictures of special equipment measurement.
13. a kind of terminal, which is characterized in that including processor and memory, computer program, institute are stored in the memory
Method described in any one of claims 1-6 can be realized by stating when computer program is called and executed by the processor.
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