CN105788566A - Gray-scale brightness curve correction system and method - Google Patents
Gray-scale brightness curve correction system and method Download PDFInfo
- Publication number
- CN105788566A CN105788566A CN201610297012.4A CN201610297012A CN105788566A CN 105788566 A CN105788566 A CN 105788566A CN 201610297012 A CN201610297012 A CN 201610297012A CN 105788566 A CN105788566 A CN 105788566A
- Authority
- CN
- China
- Prior art keywords
- display
- brightness
- curve
- standard
- gray
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000012937 correction Methods 0.000 title claims abstract description 13
- 230000007613 environmental effect Effects 0.000 claims abstract description 65
- 238000005259 measurement Methods 0.000 claims abstract description 58
- 238000012545 processing Methods 0.000 claims description 17
- 238000013507 mapping Methods 0.000 claims description 11
- 238000012546 transfer Methods 0.000 claims description 10
- 238000012795 verification Methods 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 230000006870 function Effects 0.000 description 18
- 230000008859 change Effects 0.000 description 11
- 230000000694 effects Effects 0.000 description 11
- 230000003287 optical effect Effects 0.000 description 10
- 230000008569 process Effects 0.000 description 8
- 238000002474 experimental method Methods 0.000 description 7
- 230000008676 import Effects 0.000 description 7
- 239000000523 sample Substances 0.000 description 6
- 238000003745 diagnosis Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000005286 illumination Methods 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 3
- 230000001186 cumulative effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 238000004422 calculation algorithm Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000002372 labelling Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000013519 translation Methods 0.000 description 2
- 206010018429 Glucose tolerance impaired Diseases 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 238000005282 brightening Methods 0.000 description 1
- 238000000205 computational method Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000012769 display material Substances 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007170 pathology Effects 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/10—Intensity circuits
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Controls And Circuits For Display Device (AREA)
- Measuring And Recording Apparatus For Diagnosis (AREA)
Abstract
The invention discloses a gray-scale brightness curve correction system and method. The method comprises the following steps that an environmental light brightness background value scattered by a displayer is acquired by utilizing a brightness measurement module through the environmental conditions so that the maximum and minimum gray-scale brightness of the displayer under environmental light is measured and standard gray-scale display output is calculated, a nonstandard DICOM curve imported to the displayer can be calculated by removing environmental light brightness, and curve output of different environmental conditions is judged and scheduled through output of an environmental light sensor. The curve meeting the standard requirements can still be measured at the observation end of the medical professional displayer under the influence of environmental light so that image distinguishing capability of doctors can be enhanced.
Description
Technical field
The present invention relates to the correction system and method for a kind of gray-scale intensity curve.
Background technology
Along with the development of science and technology and medical industry, in order to improve efficiency and the accuracy rate of medical diagnosis, the display effect of medical image is required more and more higher by doctor, and the application of specialty medical display is also more and more universal.Research shows that the eyes of the mankind have obvious difference for the resolution capability of different brightness, and traditional great many of experiments statistics, specification has gone out the gray-scale intensity curve of an international standard, is namely referred to as standard DICOM curve.Showing by the response change of brightness being incorporated into by vision the image of specialty medical display, improve doctor to the diagnosis capability of focus in medical image.The raising of the identification ability of this image technicality, anticipation and treatment to patient's pre-diabetic condition serve very big help.As can be seen here by being effectively improved the image display capability of imaging system, it is possible to the treatment carrying out pathology that assists a physician preferably judges.The GTG effect realizing display output is satisfied with GTG standard display function (GSDF), and this is one of the maximum difference of specialty medical display and normal domestic display.
For the inspection correction of traditional standard gray scale display output, medical Professional display monitor is measured under dark fieid conditions and is obtained, and thus verifying the gray-scale intensity standard curve obtained is the output brightness of display curve under not having the impact of environment light.And the environment that uses of medical Professional display monitor will necessarily introduce the impact of environment light, when medical Professional display monitor is placed on non-dark fieid conditions, a part of environment light is emitted onto display pannel, generation reflection and diffuse-reflectance are made a part of environment light eventually enter human eye or brightness measurement equipment by panel surface by incident illumination.The output intensity of brightness that the bright intensity that visible end of probe is collected is medical Professional display monitor self is accumulated an ambient light background intensity.Wherein, the numerical values recited of ambient light background intensity has been limited primarily by the impact of the placement location and display self-condition etc. of the illumination of surrounding, space structure, display.And the restriction of the office location of the geographical position of hospital and each section office thereof, all will cause that the output brightness of display is affected by different condition environment light.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the invention provides the correction system and method for a kind of gray-scale intensity curve, change details in a play not acted out on stage, but told through dialogues and measure the lower standard DICOM curve output characterized, meet under actual environment optical condition limits, the output of standard gray scale brightness curve, inputted by the monitoring of ambient light sensor, realize being adapted to the standard DICOM curve output of multiple environmental condition, meet the reading of hospital's variation environment, improve the resolution capability of image, especially the error correction to relatively low gray-scale intensity, more meet standard curve code requirement, display is made to more conform to medical specification and diagnosis demand.
nullFor reaching foregoing invention purpose，First technical scheme of the present invention is: the correction system of a kind of gray-scale intensity curve，It is characterized in that comprising: display、Arrange over the display and the ambient light sensor of induced environment brightness size、Upper computer control module、It is positioned at the central processing module of display、In centrally disposed processing module and be generalized machine control module verification mapping table、In centrally disposed processing module and the standard curve corresponding with mapping table、Several display curves in centrally disposed processing module、It is positioned at display and the machine that is generalized controls module and controls and export the PWM module of luminosity、And display is carried out the brightness measurement module of intensity detection，Its standard curve removes the environmental light brightness background value obtained by ambient light sensor，Thus obtaining corresponding display curve.Preferably, brightness measurement module is utilized to obtain the environmental light brightness background value that display scatters by environmental condition, and then measure and obtain display minimum and maximum gray-scale intensity under ambient light and calculate and obtain standard gray scale display and export, remove environmental light brightness again, then the non-standard DICOM curve importing display is calculated, finally by the curve output exported when judging to transfer varying environment of ambient light sensor.
For reaching foregoing invention purpose, the second technical scheme of the present invention is: the bearing calibration of a kind of gray-scale intensity curve, it comprises the steps:
S1: first carry out applied environment selection, types of applications environment is to there being different bias light intensity；
S2: then display device space and use setting；
S3: measure whether gray-scale intensity curve meets error amount standard again, satisfied words enter step S8, and ungratified words enter step S4；
S4: according to different bias light intensity collection bias lights；
S5: the standard curve that relative set is different；
S6: by the standard curve in step S5, then remove environmental light brightness background value, it is thus achieved that corresponding display curve；
S7: display curve is calibrated by upper computer control module；
S8: the then display curve after write calibration；
S9: the display curve after calling calibration finally according to environment photoinduction input is to terminating.
On the basis of technique scheme, farther include following attached technical scheme:
Described different bias light intensity includes the light field under details in a play not acted out on stage, but told through dialogues, the first brightness, the light field under the second brightness.
Described step S9 includes:
S91: utilize the ambient light sensor monitoring to outside display environment, and division has several ambient brightness order of magnitude；
S92: for different induced environment brightness size ranks, transfers the display curve after calibration under corresponding environmental light.Display curve after its alignment is deformation DICOM curve.
The present invention is directed to conventional medical Professional display monitor and can meet the human eye resolution feature to light intensity under GTG standard display condition better, owing at present the gray-scale intensity of display being calibrated, the brightness measurement module used is carried out realizing under details in a play not acted out on stage, but told through dialogues environmental condition, the interference of environment light is there is when actual use, the gray-scale intensity curve making display is being observed end deformation by this, thus comparing to the standard curve of traditional specifications, create bigger curve error, especially in comparatively bright surrounding, error is far beyond its error criterion, the present invention proposes the bearing calibration of a kind of gray-scale intensity curve being suitable for environment light condition, by using the curve of this deformation, the reception that display GTG standard under environment light condition is shown by receptor can be realized.Inputted by the sensing of display environment optical sensor and control, it may be achieved display is adapted to the GTG standard display output of multiple environmental condition, meets the requirement of hospital's variation environment, helped doctor to the identification of image feature and resolution.And in order to when practical application, the output requirement of GTG standard display function is still satisfied with in the gray-scale intensity response making collection end of probe, the namely brightness output of display and environment light add and value is only conformance with standard DICOM curve condition, needing the GTG standard display curve that traditional monitor is imported to remodify, the effect of the output brightness of display after correction and environment light then creates a new serial gray-scale intensity values being satisfied with standard DICOM curve requirement.The deformation gray-scale intensity curve that display imports, then utilize details in a play not acted out on stage, but told through dialogues test instrunment can realize the calibration of its brightness output.Utilize the sensing to surrounding environment light of the medical Professional display monitor environment light probe sensing, can be read by internal circuit and be provided with the Curve Design under multiple different lightness environment, by calling different gray-scale intensity curves, the use under various circumstances of medical Professional display monitor can be satisfied with.
Compared with prior art, the method have the advantages that
1, show in output in the GTG standard of traditional medical Professional display monitor, in order to meet the human eye sensing requirement to display brightness, it is provided with a standard DICOM curve, so can ensure that more accurately identifying output image, this realizes process is then that environment realizes when being details in a play not acted out on stage, but told through dialogues around.In actual applied environment, display needs to use in indoor environment, at this moment the display brightness sensed in the brightness measurement module of receiving terminal compares to dark fieid conditions and will change, this change result in the GTG being an actually-received and shows that output compares to standard-required and creates error very greatly, and its value is far beyond the range of error in specification.The reception that the GTG standard under environment light condition that present invention can be implemented in shows is measured；
2, by medical Professional display monitor being used the measurement of environment, the output bias light intensity size of display can be obtained, by the acquisition to this value, it is possible to obtain display under specific environment optical condition, meet the GTG standard display output of standard DICOM curve requirement；
3, under the sensing initial conditions of the ambient light sensor of medical Professional display monitor, the a plurality of gray-scale intensity curve meeting all kinds of environment can be set, it is placed in memorizer, call each curve by utilizing central processing module to carry out input-output, it may be achieved display in a variety of environmental conditions meet the actual requirement that GTG standard shows.By display, the adaptation of varying environment being used, it may be achieved display normal brightness under multiclass environment light receives, this makes doctor that the details of image be had more to judge accurately, and the focus that image show has sensitiveer resolution, raising diagnosis capability.
Accompanying drawing explanation
Fig. 1 is present invention gray-scale intensity curve chart under two class environment light.
Fig. 2 is that ambient light of the present invention is relative to the luminance difference variation diagram between each GTG of dark fieid conditions.
Fig. 3 is present invention instrumentation plan under specific environment optical condition.
Fig. 4 is present invention instrumentation plan under alterable environment light condition.
Fig. 5 is the present invention front 50 low gray-scale intensity output curve diagrams under environment light condition seven kinds different.
Fig. 6 is the flow chart of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail.
nullEmbodiment: as shown in figures 1 to 6，It provides the first embodiment of correction system of a kind of gray-scale intensity curve for the present invention，It includes display、Arrange over the display and the ambient light sensor of induced environment brightness size、Upper computer control module、It is positioned at the central processing module of display、Mapping table in centrally disposed processing module、In centrally disposed processing module and corresponding with mapping table and the standard curve of respective environment can be transferred、Several gray-scale intensity curves in centrally disposed processing module、It is positioned at the PWM module of display、And display is carried out the brightness measurement module of intensity detection，Wherein brightness measurement module is utilized to obtain the environmental light brightness background value that display scatters by environmental condition，And then measure and obtain display minimum and maximum gray-scale intensity under ambient light and calculate and obtain standard gray scale display and export，Remove environmental light brightness again，Then the non-standard DICOM curve importing display is calculated，The curve output exported when judging to transfer varying environment finally by ambient light sensor.In order to satisfy condition the setting of requirement, need to arrange the function that the GTG standard under the environment light obtained shows, the design source of its function needs to rely on the debugging of upper computer control module and brightness measurement module, the correction procedure of brightness measurement module can realize the gray-scale intensity of display and accurately export, namely complete factory preset in display is put and a plurality of call gray-scale intensity curve of output, by the selection of these curves is used, the multiple user rs environment demand under objective requirement can be realized, when these ambient As, the GTG standard display output of end of probe can be acquired, and the simulation of required surrounding environment light is arranged, it it is then the design being satisfied with display to critical environmental condition.Central processing module is preferably single-chip microcomputer, ARM, FPGA etc..
Its sensing output valve can be obtained in real time by ambient light sensor, the size of this numerical value depends on the strong and weak situation of surrounding environment light, by making an one-dimensional map table, make each sensing output valve to there being an ambient light background intensity level, each ambient light background intensity level can carry out testing before dispatching from the factory by brightness measurement module obtaining and (pass through in experiment to change environmental light brightness, the sensing output valve of ambient light sensor is continually changing, read each sensing output valve, measure acquisition ambient light background intensity level when display is closed by brightness measurement module simultaneously, measurement process is as shown in Figure 4.For the display determined, may know that two brightness values of minimum gray scale (0 GTG) that display self exports and most high gray (the 255th GTG), the upper sensing that added up by the two brightness value obtains and a corresponding ambient light background intensity level, namely the minimum brightness under eye-observation and high-high brightness are obtained, output function is shown according to the two numerical value and GTG standard, can calculating the brightness value obtaining 256 GTGs, this is consistent with standard curve requirement.Calculated 256 brightness values are deducted ambient light background intensity level, it it is then the brightness value needing to import 256 GTGs in display, by the brightness calibration module that upper computer control module and display are built-in, each the brightness size that can accurately debug 256 GTGs that display makes it export corresponding is exactly that Theoretical Calculation needs, and is write in central processing module by the display curve after this calibration.For different environment light, sensed data can be monitored in real time by ambient light sensor for above step and transfer different ambient light background intensity levels, thus realizing different curve output.
Brightness measurement module has been used for brightness output and has corrected, and its condition is satisfied with traditional black field ambient As requirement, and is not content with the standard gray scale display output having under certain brightness conditions.Under the condition measured in details in a play not acted out on stage, but told through dialogues requires, so that curve still meets its standard-required, and show realize meeting its qualified output effect of final brightness by correcting this standard gray scale.As shown in Figure 6, the multiple requirement of environmental condition is used in order to be satisfied with reality, adapt to diversified display surrounding, environmental condition according to external change, carry out the GTG standard display output (standard curve 1 shown in Fig. 6 of adaptively changing display, 2 and 3), by the setting to these gray-scale intensity curves under various circumstances, and perform importing (the display curve 1 shown in Fig. 6 of calibration trace under destination object environmental condition, 2 and 3), medical Professional display monitor curve under varying environment light can be realized and automatically transfer output, the i.e. built-in curve 1 of display, 2 and 3, and acquire the GTG standard luminosity curve (standard curve 1 shown in Fig. 6 at receiving terminal, 2 and 3).
In traditional GTG standard display curve is arranged, so that display has the brightness output of accurately setting under each GTG initial conditions of regulation, require over brightness measurement module and demarcate all of gray-scale intensity output valve size one by one, its set input standard value is then calculated by standard curve theoretical model and provides, and a kind of computational methods that can provide here are the minimum luminance value by arranging under all GTGs of display and maximum brightness value calculates and obtains all of 256 GTG display brightness standard values.What table 1 provided is some high-high brightness that display under condition is set and minimum brightness output situation.
The brightness value that table 1 edge GTG is corresponding
| Grey decision-making | 0 | 255 |
| Brightness value (cd/m2) | 0.65 | 238.94 |
By analyzing the display extreme value brightness under this type of condition, it is possible to obtain all needs by the calculating of GTG standard display function and arrange the GTG display brightness value of output.Utilize the brightness measurement module that algnment accuracy is high, it is possible to arrange by each gray-scale intensity brightness accurately of display is debugged, it may be achieved display GTG standard display output before dispatching from the factory.Above standard method is accurately under required measuring condition, but the applied environment condition of display is but not measure verification condition, even has comparatively significantly difference.Such difference source is the impact that display uses the surrounding environment light of condition.The calibration of measuring of the GTG standard display output realizing display is completed by brightness measurement module, and its ambient As is to carry out under without the Guan Bi environment of bias light.As can be seen here, what the GTG normal brightness curve of output obtained by calibration equipment instrument was met is the standard-required of dark fieid conditions.This compares with actual use environment, has comparatively significantly property difference.By arranging different environmental conditions, it is possible to analyze and obtain these difference characteristics.
In order to find the impact effect that display gray-scale intensity is exported by environment light, multiple different use environmental condition can be built.Firstly the need of it is considered that the display GTG under details in a play not acted out on stage, but told through dialogues environment shows, simultaneously in order to consider the factor of surrounding, required brightness measurement module needs to meet actual measurement requirement, and namely it can use at non-dark fieid conditions, and measurement effect then contains environment light factor.By using such brightness measurement module, can measure and obtain one group of GTG standard display brightness output valve.Then, what change environment light arranges condition, makes environment meet fluorescent lamp condition, and under this environmental condition, environment light will be scattered and cause that brightness produces synergistic effect by display.By the standard calibration requirement specified, utilize same brightness measurement module again to measure and obtain one group of GTG standard display brightness output valve.Not realize measurement under sealing condition due to brightness measurement module, both the above environmental condition will cause two different GTG display brightness curve of output values.By the standard error requirement of GTG standard display function, it is possible to calculate and obtain two standard error values, the error that the GTG standard of what table 2 provided is a certain environment light condition and details in a play not acted out on stage, but told through dialogues environment show contrasts situation.By such Experimental comparison, can be seen that the GTG standard of display shows that being arranged under dark fieid conditions is the requirement fully meeting criteria limit, and when using display under having environment light condition, due to the impact of ambient environmental conditions, its measurement error will produce considerable influence.
The GTG error of table 2 varying environment condition
| Environmental condition | Details in a play not acted out on stage, but told through dialogues | Fluorescent lamp |
| GTG standard display error | 2.17% | 32.64% |
Visible as shown in Figure 1, the display output of the gray-scale intensity of display defines two curved lines, wherein measures under dark fieid conditions limits and obtains for one, and another is then measured under certain environment brightness and obtains.Contrast two curves, it seems that apparent, complete a translation between two curves, the experiment of this translation motion confirms that display is affected by environment light and is regarded as the impact that there is a constant background brightness.In order to obtain more contrasting accurately, 256 gray-scale intensity values of two suite lines can be carried out differential analysis.As in figure 2 it is shown, what provide is the luminance difference of GTG standard display output.Can obtaining from data analysis, its all of difference is a constant, and the smaller difference between all data is then owing to measurement error and systematic error produce.Assume that the environment that display uses is just invariable, and display does not have error in the brightness measurement of different GTG display outputs at different levels, here average algorithm can be utilized to calculate the output difference obtaining above two groups of GTG display brightness, and the calculating of this numerical value can be passed through formula 1 and obtain:
(1)
Wherein Δ L0,ΔL1,ΔL2,…,ΔL255What represent is the luminance difference under two kinds of ambient environmental conditions under all 256 GTG initial conditions, and Δ L represents is that the GTG standard display brightness under code requirement is poor.Consider the error of repetitive measurement, here by calculating that all luminance difference are averaged, can more reasonably calculate and obtain a normal brightness difference, here this difference is thought the background intensity values introduced under this environment light condition.
As it is shown on figure 3, by the brightness measurement module utilizing a standard, under certain environmental conditions, it may be achieved the brightness measurement to display, such measurement is misclosure.According to above measurement result, it is possible to obtain one it is concluded that display is under specific environment light condition, the display output of its GTG standard meets the display output under dark fieid conditions one background intensity values of superposition.This process can be represented by following formula:
(2)
Wherein L0Being expressed as the GTG standard display output under details in a play not acted out on stage, but told through dialogues initial conditions, what L represented is the GTG display brightness output under a certain environment light condition, and B is then the display background brightness value that environment light introduces.This conclusion confirmed from experiment is also consistent with theoretical model.The surrounding applied when display has set, and the placement location of display it is also determined that after, the action effect of environment light is then confirmable by display output face, and this added value may be considered the background effect value of display.Thus with display, display background brightness value does not show that different images changes, and its value is limited solely by display material, and simultaneously by the impact of surrounding brightness and display placement condition etc..
As shown in Figure 4, regulating by ambient lighting being penetrated the light and shade of brightness, changing the use ambient brightness of display serially, and when all varying environments, display is carried out GTG display brightness measurement.By using an adjustable ambient As of brightness, this giving the brightness display output under seven kinds of ambient light illuminations, as shown in Figure 5, seven curves in figure are also each represent the measurement result under respective condition.In order to characterize the variation characteristic of these curves comparatively significantly, figure illustrate only nearly 50 groups of brightness values of relatively low GTG.According to above-mentioned theory analysis and experiment, and with reference to the curvilinear motion form in figure herein, still can becoming apparent under different environment light conditions is arranged, the mutual difference between its curve also exists a background value.Figure is positioned at GTG display curve of lowermost end measure under dark fieid conditions and obtain, the brightness curve under other conditions is carried out with it difference contrast, the result shown in table 3 can be obtained.
The GTG error of table 3 varying environment condition
| Environmental condition | Brightness value (Lux) | Brightness display error |
| Details in a play not acted out on stage, but told through dialogues environment | 0 | 2.17% |
| Environment one | 70 | 7.40% |
| Environment two | 150 | 12.43% |
| Environment three | 250 | 20.58% |
| Environment four | 350 | 25.35% |
| Environment five | 450 | 28.48% |
| Environment six | 550 | 32.64% |
As shown in Table 3, along with the enhancing of the surrounding brightness that display uses, its GTG display brightness error is obvious ascendant trend.This phenomenon can also be clearly understood that by theoretical model hypothesis, and along with brightening of ambient lighting, the light intensity scattered out from display also becomes big therewith.Showing that curve of output is for benchmark with the GTG standard of dark fieid conditions, the bias light intensity values of superposition is more big, then curve deviation is more obvious, and corresponding error amount also will be bigger.
Error according to the GTG display generation that above-mentioned experiment presents, is only be only to meet within the scope of error criterion under more weak environment light condition for traditional GTG standard display curve of output meeting dark fieid conditions.More than experiment and theoretical give also under actual environment light condition and under dark fieid conditions, by formula 2 formula it can be seen that the output brightness of display impact on receiving terminal response value.It is an object of the invention to, it is ensured that under certain environment optical condition, the display GTG that brightness measurement module receiver end is collected shows the requirement meeting standard curve.Assume that the brightness of all 256 GTGs that display self exports is sized to, L0Representing the gray-scale intensity curve that display is built-in, subscript 0-255 represents 256 gray-scale intensity values of write display, then, under specific environment light condition, the brightness value L of observer's perception is all display self luminosity L0Being accumulated an ambient light background light intensity B, this value is unrelated with display condition.Under this condition, it is possible to obtain two extreme values in end of probe measurement, be expressed asWith, the brightest the most secretly it is worth what a distance (not being paste to measure over the display to obtain) measurement obtained after this value environment light that has been superposition, and indexing is the brightness not having environment optical display unit self to send.By the setting that the GTG standard under actual environment optical condition is shown, it is possible to provide the display brightness under the environment light being satisfied with standard curve requirement and export, all of 256 the GTG display brightness output valves of labelling here, for.The effect of the curve of the arrangement above environment light that has been then superposition, and need the gray-scale intensity values arranged to meet equation in display: Ls=L-B.
Import and verification by the GTG of display is shown, it may be achieved the standard output of equipment under specific environment optical condition.Further, along with the change of surrounding brightness, when ensureing that other conditions are constant, the background environment brightness values of display scattering changes therewith.In order to more reasonably adapt to multiple use environmental condition, display is under the sensing of its ambient light sensor inputs, can realizing the brightness to multiple environmental condition to sense, and export a numerical value, this value can obtain in predetermined analog environment and import in display.According to the size of this influence value, a plurality of characteristic curve can be set out, each characteristic curve can be measured under corresponding environment light condition and realize GTG standard luminosity curve, and the acquisition of these curves considers the difference of the display limit brightness value under specific environment light and calculates according to GTG canonical function and obtain.The a plurality of gray-scale intensity curve of arrangement above is imported display, and according to different environment induction output valves, can realize, when different environmental light brightness, respective GTG standard is shown calling of curve of output, finally meet the normal brightness output under polymorphic type environment light condition of the medical Professional display monitor.By correction GTG standard shown with upper type and accurately setting, display standard curve output under each ambient environmental conditions can be realized, and do not affect doctor's GTG to image and judge, thus being effectively improved the identification ability to image, and then better focus is judged, improve diagnosis and treatment ability.
The process that realizes of this gray-scale intensity bearing calibration is referred to shown in Fig. 6, use environmental condition firstly the need of selected display, the concrete use section room environmental such as display and section's indoor placement location, under this environmental condition, display utilizes brightness measurement module to obtain an ambient light background value when being not keyed up state, and this ambient light background value is certain value under this environmental condition.Then brightness measurement module is utilized can to measure the minimum gray scale brightness obtaining display under open state and most high gray brightness, brightness value size under the two numerical value environment light that has been superposition, according to GTG standard display function relation, and GTG standard display function is by the 1023 intensity level mathematical difference methods definition derivative and next from Barten ' s model.GTG standard display function makes us can calculate brightness L, its unit, every cubic metre of how many candelas, and it is as the function of just recognizable difference (JND) index value j:
Ln represents natural logrithm, and j is JNDs intensity level LjIndex value (from 1 to 1023), a=-1.3011877, b=-2.5840191E-2, c=8.0242636E-2, d=-1.03202292E-1, e=1.3646699E-1, f=2.8745620E-2, g=-2.5468404E-2, h=-3.1978977E-3, k=1.2992634E-4, m=1.3635334E-3.Thus can calculate and obtain required standard curve (standard curve shown in Fig. 6), this standard curve is deducted and measures the ambient light background intensity level obtained, namely the gray-scale intensity curve of output (the display curve shown in Fig. 6) of display is obtained, by using the PWM of PC control display effectively to change output brightness of display size, 256 gray-scale intensity calculating gained according to function can be mated exactly, can accurately import set gray-scale intensity numerical value (namely from 256 the gray-scale intensity data controlling calibration of host computer recited above) in the display, after completing this process, at display under environment light condition, (standard curve shown in Fig. 6) is measured in the reception that can meet GTG standard output.
Thus as shown in figures 1 to 6, it provides second embodiment of bearing calibration of a kind of gray-scale intensity curve of output for the present invention, and its step is as follows:
S1: first carry out applied environment selection, the types of applications environment gray-scale intensity curve to there being different setting, namely the different curves manually selecting display built-in by menu can confirm that different environmental patterns, include the environment of multiple section office, such as the pattern under the varying environment optical condition such as radiology department, operating room, office；The use environmental selection of display, different environmental conditions produces different ambient light intensity sizes；
S2: then displaying device space and use setting, owing to different spatial brightness is inconsistent in same room, the impact of display will be not quite similar by environment light, it is therefore desirable to determines putting position in a room before using display；Under different environment light conditions, can be sensed by ambient light sensor and obtain different numerical value, for each numerical value, it is possible to use brightness measurement module acquires the ambient light background intensity level of each correspondence under display off-mode；
S3: measure whether gray-scale intensity curve meets error amount standard again, wherein table 2 and table 3 have the error information under multiple environmental condition, and satisfied words enter step S8, and ungratified words enter step S4；
S4: according to different bias light intensity collection bias lights, under different department environment, its illumination condition is different, the brightness then scattered out from the panel of display is different, according to different background environment brightness, (formula 1 calculates gained to needs, also it being the B value in formula 2) size is to change the DICOM curve of display, and three kinds is an approximate number, indicates multiple choices.By utilizing ambient light sensor, the surrounding brightness of detectable display, the background environment brightness values of correspondence can be obtained by making mapping table, namely this value is shown in formula 1, is also the B value in formula 2；
S5: different standard curves is set；The panel obtaining minimum gray scale and most high gray can be set at details in a play not acted out on stage, but told through dialogues environment and export brightness value, as shown in Table 1, background light level value (from formula 2) when this two numerical value each cumulative respective environment, obtain minimum and maximum brightness value, and utilize GTG standard display function to calculate according to the two value to obtain 256 gray-scale intensity (256 GTG display brightness values that namely in formula 2, L represents).For different environment light, bias light intensity level is different, and the gray-scale intensity curve of calculating and setting is also different, and these curves are all consistent with dicom standard requirement；When display is specifically placed under some environmental condition, the minimum luminance value of known display self and maximum brightness value, and by ambient light sensor influence value to there being an ambient light background intensity level, by all cumulative to the minimum luminance value of display and maximum brightness value this ambient light background intensity level upper, obtain two brightness values, coordinating GTG standard display function, can calculate and obtain 256 brightness values, these brightness values are consistent with standard curve requirement；
S6: different display curves is set；Use under environmental condition in a certain kind, by S5 calculated gray-scale intensity curve conformance with standard DICOM curve requirement under environment light condition, in order to ensure this effect (data that brightness measurement module obtains), need to import to 256 gray-scale intensity values of display, it is then deducted on S5 curve basis shown in ambient light background intensity level formula 1), new 256 gray-scale intensity (the namely L in formula 2 obtained0256 the GTG display brightness values represented), this process can be described by formula 2 and obtain.A kind of environment light condition is for the standard curve in a S5 step, and then obtains the display curve in a S6 step, and display curve is unsatisfactory for dicom standard, is the gray-scale intensity change needing to import display；By 256 gray-scale intensity values calculated in step S5, all deducting this ambient light background intensity level, can obtain new 256 brightness value, this is to need 256 gray-scale intensity values in write display, is a non-standard curve；Namely the cumulative background intensity values of these 256 new brightness values, it is simply that standard curve, is also the luminosity+environment light just saying display, and the brightness curve entering human eye is consistent with standard-required；
S7: display curve is calibrated by upper computer control module；In order to ensure the accuracy of the display GTG display brightness in step S6, by host computer, the adjustment of PWM can effectively be controlled the display brightness size of display, and control each gray-scale intensity and all meet 256 brightness sizes of curve, namely the output brightness of display size that 256 GTGs of accurate alignment are corresponding so that it is consistent on each brightness car following-theory of actual output；
S8: the then display curve after write calibration；By the brightness regulation that S7 step is actual, obtain the mapping table of 256 gray-scale intensity, the gray-scale intensity curve of Theoretical Calculation in S6 can be shown exactly by writing this mapping table, this gray-scale intensity curve writes in ARM depositor, the gray-scale intensity curve of verification setting can also be carried out by the brightness measurement module that details in a play not acted out on stage, but told through dialogues regulates, it is about in the non-standard curve write display calibrated, calls；
S9: last environment photoinduction input calls curve to terminating, the brightness size to surrounding can be obtained by environment photoinduction to judge, different influence value sizes is to there being different background environment brightness values (namely measuring obtained in S4 step), also just to there being different gray-scale intensity curve (namely in step S6 set), by such mapping process, different environment photoinduction values can be transferred different deformation DICOM curves so that under this environment light condition, be always maintained at standard DICOM curve requirement at receiving terminal.Use same curve standard to be applied in varying environment condition to create bigger GTG error compared to traditional, the method for this environment photoinduction amendment curve can make observer apparent see image；According to different environment light conditions, it is possible to the above operation of circulation arranges curve, due to limited storage space, can only write the curve (namely for limited environmental condition) of limited bar.
The operation principle of the present invention is as follows: observer will produce due to the DICOM curve consistent with display significant error under difficult environmental conditions, and limit beyond error criterion；Then measure and obtain bias light numerical value；Then when given circumstance, observer obtains minimum maximum brightness；256 GTG normal brightnesses are calculated further according to GTG standard display function；Then calculated by formula 2 and obtain 256 built-in brightness values of display (i.e. non-standard DICOM curve)；Recycling upper computer control module controls the PWM module of display and accurately sets each gray-scale intensity and the calculating gained of coincidence formula 2；Finally for multiple environmental condition, make mapping table according to ambient light sensor and transfer corresponding curve, and transfer this curve.
nullTraditional medical Professional display monitor built-in gray-scale intensity curve output meet dicom standard requirement，Its measuring condition is measured under meeting dark fieid conditions and is obtained，The recognized standard requires then to provide under dark fieid conditions，Therefore traditional measurement judges that only meeting details in a play not acted out on stage, but told through dialogues uses environment，And under certain environment light condition, measure the gray-scale intensity curve obtained will necessarily introduce environment optical path difference，This error size depends on the intensity of environment light，In order to effectively judge that environment light is to measuring the error introduced，The present invention by correcting the gray-scale intensity curve under original dark fieid conditions arranged to the monitoring of environment light，Brightness measurement module is utilized can effectively to detect the brightness output valve obtaining display under details in a play not acted out on stage, but told through dialogues and environment light condition，According to the requirement that display GTG standard shows，The error amount obtaining respective curve can be calculated，The error (from table 3) that this error amount substantially specifies beyond standard when light field，And progressively become big with the enhancing of environment light，This effect will have a strong impact on the identification ability of human eye；
Display needs the GTG standard display error met, the present embodiment is set as 10%, exceed this threshold value then to need to be corrected, the available brightness measurement module of this error value and ERROR ALGORITHM calculate and obtain, by certain environment light arrange lower to display off-mode under the measurement of environment light scattering value, and carry out repetition measurement operation repeatedly, environmental light brightness background value can be effectively obtained, the size of this numerical value determines the error size of display gray-scale intensity curve, and this numerical value is unrelated with the display state of display；
Under certain environment light is arranged, display measures the brightness value of end owing to being subject to environment light action in brightness measurement module, and its intensity size will be above display self luminous intensity values, can the brightness value of the lowest-order that obtains of labelling measurement and most high-order gray scale be hereinWith；Here brightness measurement module and display have certain distance, are not attached to display surface and measure, therefore will be simultaneously received the environment light brightness values from panel surface scattering.
Measuring, according to brightness measurement module, two limit of brightness values that end detects, can pass through the calculating of GTG standard display function and obtain all 256 brightness values, this curve is then meet dicom standard requirement (standard curve 1,2 and 3 as shown in Figure 6)；
GTG standard in order to meet environment light condition shows output, gray-scale intensity curve in built-in display needs to be corrected when meeting standard conditions above, reference formula 2, trimming process deducts the background environment brightness values obtained by above-mentioned steps measurement in original gray-scale intensity curve values, thus obtaining the GTG display brightness curve (display curve 1,2 and 3 as shown in Figure 6) imported in display；
256 gray-scale intensity accurately set to ensure display to export, require over brightness measurement module and upper computer control module to carry out brightness calibration, owing to calibration realizes under Guan Bi environmental condition, this namely makes each gray-scale intensity output of display meet the DICOM curve (display curve 1,2 and 3 as shown in Figure 6) of deformation；
So that display meets the requirement of multiple environmental conditions, the ambient light sensor probe that display is provided with can obtain surrounding environment light brightness case in real time, and exportable one represent the judgement numerical value that environmental light intensity is weak, the a plurality of DICOM curve meeting error criterion can be provided according to this input value, by display built-in central processing module calling DICOM curve, it may be achieved display adapts to the GTG standard display curve of output under the restriction of varying environment condition.
Preferably, central processing module is FPGA, the real-time calculation display curve of formula 2 can be passed through, known conditions is minimum brightness and high-high brightness, ambient light background value and the GTG standard display function of display self, therefore all of curve can be calculated in real time, it is not necessary to write display interior in advance.
Thus the present invention utilizes brightness measurement module to obtain the environmental light brightness background value that display scatters by environmental condition, and then measure and obtain display minimum and maximum gray-scale intensity under ambient light and calculate and obtain standard gray scale display and export, remove environmental light brightness, the non-standard DICOM curve importing display can be calculated, and judge to transfer curve output when varying environment by the output of ambient light sensor.
Certain above-described embodiment only for technology design and the feature of the present invention are described, its object is to allow person skilled in the art will appreciate that present disclosure and to implement according to this, can not limit the scope of the invention with this.All equivalent transformations done according to the spirit of main technical schemes of the present invention or modification, all should be encompassed within protection scope of the present invention.
Claims (6)
1. the correction system of a gray-scale intensity curve, it is characterized in that comprising: display, arrange over the display and the ambient light sensor of induced environment brightness size, upper computer control module, it is positioned at the central processing module of display, in centrally disposed processing module and be generalized machine control module verification mapping table, in centrally disposed processing module and the standard curve corresponding with mapping table, several display curves in centrally disposed processing module, it is positioned at display and the machine that is generalized controls module and controls and export the PWM module of luminosity, and display is carried out the brightness measurement module of intensity detection, its standard curve removes the environmental light brightness background value obtained by ambient light sensor, thus obtaining corresponding display curve.
2. the bearing calibration of a gray-scale intensity curve, it is characterised in that it comprises the steps:
S1: first carry out applied environment selection, types of applications environment is to there being different bias light intensity；
S2: then display device space and use setting；
S3: measure whether gray-scale intensity curve meets error amount standard again, satisfied words enter step S8, and ungratified words enter step S4；
S4: obtain, by brightness measurement module, the environmental light brightness background value that display scatters under different bias light intensity；
S5: the standard curve that relative set is different；
S6: by the standard curve in step S5, then remove environmental light brightness background value, it is thus achieved that corresponding display curve；
S7: display curve is calibrated by upper computer control module；
S8: the then display curve after write calibration；
S9: the display curve after calling calibration finally according to environment photoinduction input is to terminating.
3. method according to claim 2, it is characterised in that: described different bias light intensity includes the light field under details in a play not acted out on stage, but told through dialogues, the first brightness, the light field under the second brightness.
4. method according to claim 2, it is characterised in that: described step S9 includes:
S91: utilize the ambient light sensor monitoring to outside display environment, and division has several ambient brightness order of magnitude；
S92: for different induced environment brightness size ranks, transfers the display curve after calibration under corresponding environmental light.
5. method according to claim 2, it is characterized in that: described step S5 includes: first obtain the minimum gray scale of display self output and two brightness values of most high gray, output function is shown further according to the two brightness value and GTG standard, calculate the one group of brightness value obtaining conformance with standard curve requirement, thus forming standard curve.
6. the bearing calibration of a gray-scale intensity curve, it is characterized in that it comprises the steps: to utilize brightness measurement module to obtain the environmental light brightness background value that display scatters by environmental condition, and then measure and obtain display minimum and maximum gray-scale intensity under ambient light and calculate and obtain standard gray scale display and export, remove environmental light brightness background value again, then the non-standard DICOM curve importing display is calculated, finally by the curve output exported when judging to transfer varying environment of ambient light sensor.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610297012.4A CN105788566A (en) | 2016-05-06 | 2016-05-06 | Gray-scale brightness curve correction system and method |
| PCT/CN2016/083094 WO2017190385A1 (en) | 2016-05-06 | 2016-05-24 | Correction system and method for grey-scale brightness curve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610297012.4A CN105788566A (en) | 2016-05-06 | 2016-05-06 | Gray-scale brightness curve correction system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105788566A true CN105788566A (en) | 2016-07-20 |
Family
ID=56400782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610297012.4A Pending CN105788566A (en) | 2016-05-06 | 2016-05-06 | Gray-scale brightness curve correction system and method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN105788566A (en) |
| WO (1) | WO2017190385A1 (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108877738A (en) * | 2018-06-20 | 2018-11-23 | 广东美的环境电器制造有限公司 | Display panel luminance control method and circuit, heater |
| CN109238460A (en) * | 2018-08-24 | 2019-01-18 | 维沃移动通信有限公司 | A kind of method and terminal device obtaining ambient light intensity |
| CN109782164A (en) * | 2019-01-25 | 2019-05-21 | 高铭电子（惠州）有限公司 | The detection method of automobile starting switch |
| CN110428793A (en) * | 2019-07-09 | 2019-11-08 | 武汉精立电子技术有限公司 | A kind of gamma correction system and method |
| CN111312143A (en) * | 2020-02-28 | 2020-06-19 | 京东方科技集团股份有限公司 | Display device, driving method and driving device thereof, and computer-readable storage medium |
| CN111696475A (en) * | 2019-03-15 | 2020-09-22 | 西安诺瓦电子科技有限公司 | Display control method, device and system, storage medium and display control card |
| WO2021170040A1 (en) * | 2020-02-27 | 2021-09-02 | 京东方科技集团股份有限公司 | Method and device for adjusting display parameter, and display device |
| CN113686894A (en) * | 2021-09-13 | 2021-11-23 | 南京巨鲨显示科技有限公司 | System and method for image inspection and calibration of medical display |
| CN115394225A (en) * | 2021-05-25 | 2022-11-25 | 瑞昱半导体股份有限公司 | Display correction device and method, and display control circuit and method |
| CN115810331A (en) * | 2021-09-15 | 2023-03-17 | 北京小米移动软件有限公司 | Method, device and storage medium for calibrating OLED display |
| CN116092420A (en) * | 2022-12-19 | 2023-05-09 | Tcl华星光电技术有限公司 | Low gray-scale picture correction method and device |
| CN116777876A (en) * | 2023-06-25 | 2023-09-19 | 深圳市巨潮科技股份有限公司 | Image quality evaluation method and system for medical image display equipment |
| TWI852001B (en) * | 2021-04-28 | 2024-08-11 | 韓商Ｌｘ半導體科技有限公司 | Image data processing system for vehicle |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114360420B (en) * | 2020-10-13 | 2024-05-10 | 明基智能科技（上海）有限公司 | Image adjusting method of display device and display device |
| CN116703758B (en) * | 2023-05-23 | 2025-10-31 | 南京巨鲨显示科技有限公司 | Color temperature enhancement method and device for gray-scale medical image |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101023375A (en) * | 2004-07-13 | 2007-08-22 | 皇家飞利浦电子股份有限公司 | Standardized digital image viewing with ambient light control |
| CN101297769A (en) * | 2007-04-30 | 2008-11-05 | 通用电气公司 | Method and system for automatic adjustment of a diagnostic imaging display |
| CN101495027A (en) * | 2006-07-10 | 2009-07-29 | 皇家飞利浦电子股份有限公司 | System and method for DICOM compliant display of ultrasound images in varying ambient light |
| CN102105104A (en) * | 2008-07-28 | 2011-06-22 | Nec显示器解决方案株式会社 | Gray scale display device |
| CN103065609A (en) * | 2013-01-23 | 2013-04-24 | 深圳市华星光电技术有限公司 | Method of Gamma compensation towards display device and device of Gamma compensation |
| CN104183229A (en) * | 2013-07-09 | 2014-12-03 | 上海联影医疗科技有限公司 | Calibration method and device for display device |
| CN104347036A (en) * | 2013-08-08 | 2015-02-11 | 联想(北京)有限公司 | Information processing method and electronic equipment |
-
2016
- 2016-05-06 CN CN201610297012.4A patent/CN105788566A/en active Pending
- 2016-05-24 WO PCT/CN2016/083094 patent/WO2017190385A1/en not_active Ceased
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101023375A (en) * | 2004-07-13 | 2007-08-22 | 皇家飞利浦电子股份有限公司 | Standardized digital image viewing with ambient light control |
| CN101495027A (en) * | 2006-07-10 | 2009-07-29 | 皇家飞利浦电子股份有限公司 | System and method for DICOM compliant display of ultrasound images in varying ambient light |
| CN101297769A (en) * | 2007-04-30 | 2008-11-05 | 通用电气公司 | Method and system for automatic adjustment of a diagnostic imaging display |
| CN102105104A (en) * | 2008-07-28 | 2011-06-22 | Nec显示器解决方案株式会社 | Gray scale display device |
| CN103065609A (en) * | 2013-01-23 | 2013-04-24 | 深圳市华星光电技术有限公司 | Method of Gamma compensation towards display device and device of Gamma compensation |
| CN104183229A (en) * | 2013-07-09 | 2014-12-03 | 上海联影医疗科技有限公司 | Calibration method and device for display device |
| CN104347036A (en) * | 2013-08-08 | 2015-02-11 | 联想(北京)有限公司 | Information processing method and electronic equipment |
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108877738A (en) * | 2018-06-20 | 2018-11-23 | 广东美的环境电器制造有限公司 | Display panel luminance control method and circuit, heater |
| CN109238460A (en) * | 2018-08-24 | 2019-01-18 | 维沃移动通信有限公司 | A kind of method and terminal device obtaining ambient light intensity |
| CN109238460B (en) * | 2018-08-24 | 2020-11-06 | 维沃移动通信有限公司 | Method for obtaining ambient light intensity and terminal equipment |
| CN109782164B (en) * | 2019-01-25 | 2021-04-23 | 高铭电子（惠州）有限公司 | Detection method of automobile starting switch |
| CN109782164A (en) * | 2019-01-25 | 2019-05-21 | 高铭电子（惠州）有限公司 | The detection method of automobile starting switch |
| CN111696475A (en) * | 2019-03-15 | 2020-09-22 | 西安诺瓦电子科技有限公司 | Display control method, device and system, storage medium and display control card |
| CN110428793A (en) * | 2019-07-09 | 2019-11-08 | 武汉精立电子技术有限公司 | A kind of gamma correction system and method |
| CN110428793B (en) * | 2019-07-09 | 2021-02-23 | 武汉精立电子技术有限公司 | Brightness correction system and method |
| WO2021170040A1 (en) * | 2020-02-27 | 2021-09-02 | 京东方科技集团股份有限公司 | Method and device for adjusting display parameter, and display device |
| US11769439B2 (en) | 2020-02-27 | 2023-09-26 | Boe Technology Group Co., Ltd. | Method and device for adjusting display parameter, and display device |
| WO2021169559A1 (en) * | 2020-02-28 | 2021-09-02 | 京东方科技集团股份有限公司 | Display device and driving method and driving device therefor, and computer-readable storage medium |
| CN111312143A (en) * | 2020-02-28 | 2020-06-19 | 京东方科技集团股份有限公司 | Display device, driving method and driving device thereof, and computer-readable storage medium |
| TWI852001B (en) * | 2021-04-28 | 2024-08-11 | 韓商Ｌｘ半導體科技有限公司 | Image data processing system for vehicle |
| CN115394225A (en) * | 2021-05-25 | 2022-11-25 | 瑞昱半导体股份有限公司 | Display correction device and method, and display control circuit and method |
| CN113686894A (en) * | 2021-09-13 | 2021-11-23 | 南京巨鲨显示科技有限公司 | System and method for image inspection and calibration of medical display |
| CN113686894B (en) * | 2021-09-13 | 2023-02-24 | 南京巨鲨显示科技有限公司 | System and method for image inspection and calibration of medical display |
| CN115810331A (en) * | 2021-09-15 | 2023-03-17 | 北京小米移动软件有限公司 | Method, device and storage medium for calibrating OLED display |
| CN116092420A (en) * | 2022-12-19 | 2023-05-09 | Tcl华星光电技术有限公司 | Low gray-scale picture correction method and device |
| CN116092420B (en) * | 2022-12-19 | 2024-06-21 | Tcl华星光电技术有限公司 | Low gray-scale picture correction method and device |
| CN116777876A (en) * | 2023-06-25 | 2023-09-19 | 深圳市巨潮科技股份有限公司 | Image quality evaluation method and system for medical image display equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2017190385A1 (en) | 2017-11-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105788566A (en) | Gray-scale brightness curve correction system and method | |
| CN106384573B (en) | The OLED module Gamma adjusting process calculated based on linear interpolation | |
| CN108877736A (en) | Eliminate compensation method and the device of screen body brightness disproportionation | |
| CN106157904A (en) | Liquid crystal display and display auto-correction method thereof and device | |
| CN106297664B (en) | For the OLED module Gamma adjusting process of color sensitivity | |
| CN102300516A (en) | Check device | |
| CN111261079B (en) | Method for detecting abnormal phenomena of bright and dark spots | |
| CN104933241A (en) | Evaluation method for discomfort glare of train driving interface illumination | |
| US8320662B2 (en) | Distinguishing colors of illuminated objects using machine vision | |
| US10902644B2 (en) | Measures for image testing | |
| CN101771824A (en) | Image capturing method capable of automatically adjusting required illumination brightness | |
| CN106053024A (en) | LED light source preference prediction method for monochromatic objects | |
| CN119724495A (en) | A tongue image processing system for traditional Chinese medicine health constitution detection | |
| US10016128B2 (en) | Method and apparatus for vision acuity testing | |
| CN111601418B (en) | Color temperature adjusting method and device, storage medium and processor | |
| CN109257506A (en) | A kind of method, mobile terminal and storage medium adjusting screen intensity | |
| CN114967125B (en) | Characterization method for displaying brightness and darkness feeling based on spatial light field and color | |
| CN206214076U (en) | The demarcation threshold test device of human eye mesopic vision and photopic vision | |
| TWI788486B (en) | Visual function inspection system, optical characteristic calculation system, optical member selection method, optical member manufacturing method, display member manufacturing method, lighting device manufacturing method, visual function inspection device, optical characteristic calculation device, visual function inspection method, optical Calculation method of characteristics, computer program, and recording medium | |
| CN103177694B (en) | White balance adjusting method of LED (Light Emitting Diode) display screen | |
| Samei | New developments in display quality control | |
| CN106308737A (en) | Boundary threshold value test method of mesopic vision and photopic vision of human eyes | |
| CN113873231B (en) | Monitoring system and method for baking camera module | |
| SIITAMA | TECHNICAL PERFORMANCE ASSESSMENT AND QUALITY CONTROL OF ULTRASOUND DEVICE MONITORS | |
| CN103356158A (en) | Novel human eye color visual characteristic evaluating system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160720 |
|
| RJ01 | Rejection of invention patent application after publication |