CN107689215A - The backlight adjusting method and device of a kind of intelligent display device - Google Patents
The backlight adjusting method and device of a kind of intelligent display device Download PDFInfo
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- CN107689215A CN107689215A CN201610643750.XA CN201610643750A CN107689215A CN 107689215 A CN107689215 A CN 107689215A CN 201610643750 A CN201610643750 A CN 201610643750A CN 107689215 A CN107689215 A CN 107689215A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
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Abstract
The embodiments of the invention provide a kind of backlight adjusting method of intelligent display device and device, the intelligent display device has multiple screen areas, including：Current frame image is obtained when the multiple screen area exports, the brightness value of each screen area；According to the default backlight threshold interval belonging to the brightness value in current screen region, it is determined that corresponding backlight value；Backlight value according to each screen area determines the Variance feature value of current frame image；According to offset corresponding to the backlight value and the determination of Variance feature value；Using the backlight illumination in backlight value regulation current screen region, and, the display of next two field picture is adjusted using the offset.Image saturation distortion can be prevented in the embodiment of the present invention, ensures picture brightness, display picture permeability and level of detail is improved, picture quality can more accurately be strengthened according to different image contents.
Description
Technical field
The present invention relates to intelligent display device technical field, is adjusted more particularly to a kind of backlight adjusting method and a kind of backlight
Regulating device.
Background technology
With the continuous progress of science and technology, global 4K TV markets are grown up very fast, it is contemplated that shipment amount will reach before 2017
To 60,650,000, the proportion for accounting for overall TV market will be with light emitting diode (LED, Light- more than 24%, 4K TVs
Emitting Diode) be used as back light, ultra-thin television of the liquid crystal display as display screen, at present resolution ratio be up to
4096*2160；4K TVs have become an important milestone of TV industry development.4K TVs need to have ultra-thin, environmentally friendly
The characteristics of energy-conservation, image quality are excellent, and contrast is high.
The most 4K TVs of in the market are all the luminous forms of side entering type, light is uniformly distributed by light guide plate
In whole TV plane.The excellent image quality of high-contrast is realized by backlight regulation technology.Present backlight regulation technology
Mainly change its brightness by adjusting the electric current of each piece of LED, so that the backlight at region dark in picture
It is corresponding dimmed, it is finally reached bright bright-coloured visual effect.
Conventional backlight regulation technology is adjusted for 2D dynamic backlights.The 2D dynamic backlights regulation, is by whole backlight area
Domain is divided into multiple horizontal and vertical subregions, and to each subregion according to picture carrier in subregion, it is bright to carry out independent partitions backlight
The 2 dimensions regulation of degree.In the prior art, backlight value and offset are calculated by the picture material of each frame, still, if in light and shade
Change in violent high-contrast picture or all counted in the normal pictures that light and shade change is gentle using the mode of prior art
Backlight value and offset are calculated, it can not take into account all image contents, it is difficult to more accurately strengthen picture quality.
The content of the invention
In view of the above problems, it is proposed that the embodiment of the present invention overcomes above mentioned problem or at least in part to provide one kind
The backlight of a kind of backlight adjusting method of the intelligent display device to solve the above problems and a kind of corresponding intelligent display device is adjusted
Regulating device.
In order to solve the above problems, the embodiment of the invention discloses a kind of backlight adjusting method of intelligent display device, institute
Stating intelligent display device has multiple screen areas, including：
Current frame image is obtained when the multiple screen area exports, the brightness value of each screen area；Wherein,
The brightness paricular value is used to characterize contrast；
According to the default backlight threshold interval belonging to the brightness value in current screen region, it is determined that corresponding backlight value；
Wherein, the different default backlight threshold interval is to different backlight values；
Backlight value according to each screen area determines the Variance feature value of current frame image；
According to offset corresponding to the backlight value and the determination of Variance feature value；
Using the backlight illumination in backlight value regulation current screen region, and, adjusted using the offset next
The display of two field picture.
Preferably, the acquisition current frame image is when the multiple screen area exports, the brightness of each screen area
The step of characteristic value, includes：
Calculate the brightness value of each pixel of current frame image；
The brightness maxima of the multiple screen area is calculated using the brightness value of each pixel respectively and brightness is put down
Average；
The brightness maxima for the multiple screen area and average brightness carry out difference operation respectively, described in acquisition
The brightness value of multiple screen areas.
Preferably, the default backlight threshold interval includes the first backlight threshold interval, the second backlight threshold interval, the 3rd
Backlight threshold interval and the 4th backlight threshold interval, the default backlight belonging to the brightness value according to current screen region
Threshold interval, it is determined that the step of corresponding backlight value includes：
When the default backlight threshold interval belonging to brightness value is the first backlight threshold interval, taking for backlight value is determined
It is worth scope between 0 to corresponding screen area average brightness；
When the default backlight threshold interval belonging to brightness value is the second backlight threshold interval, it is determined that corresponding screen area
The average brightness in domain is backlight value；
When the default backlight threshold interval belonging to brightness value is the 3rd backlight threshold interval, taking for backlight value is determined
It is worth scope between the average brightness of corresponding screen area and the brightness maxima of corresponding screen area；
When the default backlight threshold interval belonging to brightness value is the 4th backlight threshold interval, it is determined that corresponding screen
The brightness maxima in region is backlight value.
Preferably, the backlight value according to each screen area determines the step of the Variance feature value of current frame image
Suddenly include：
Obtain the backlight value of the multiple screen area；
The backlight average value and backlight maximum of current frame image are calculated using the backlight value of the multiple screen area；
The backlight value of the multiple screen area and the backlight average value are analyzed using formula of variance, obtained described current
The Variance feature value of two field picture.
Preferably, each two field picture has scene contrast, and the scene contrast includes the first contrast, the second contrast
Degree and the 3rd contrast, first contrast are more than second contrast, and second contrast is more than described 3rd pair
Than degree, it is described according to the backlight value and Variance feature value determine corresponding to offset the step of include：
According to the backlight average value and the Variance feature value, the size of the scene contrast of current frame image is judged；
When the scene contrast of the current frame image is the first contrast, the backlight according to the corresponding screen area
Value, it be backlight maximum to determine offset, or, determines the span of offset for corresponding screen area backlight value and backlight most
Between big value；
When the scene contrast of the current frame image is the second contrast, it is backlight maximum to determine offset；
When the scene contrast of the current frame image is three contrast, the span for determining offset is corresponding
Between screen area backlight value and backlight maximum.
Preferably, it is described according to the backlight average value and the Variance feature value, judge the scene pair of current frame image
Than degree size the step of include：
Judge whether the Variance feature value is more than default characteristic threshold value；
If not, it is determined that the scene contrast of current frame image is the 3rd contrast；
If so, then judging whether the backlight average value is more than default average threshold；
If, it is determined that the scene contrast of current frame image is the second contrast；
If not, it is determined that the scene contrast of current frame image is the first contrast.
Preferably, it is described when the scene contrast of the current frame image is the first contrast, according to the corresponding screen
The backlight value in curtain region, it is backlight maximum to determine offset, or, determines that the span of offset is carried on the back for corresponding screen area
The step of between light value and backlight maximum, includes：
Judge the predesigned compensation threshold interval belonging to the backlight value.
Preferably, the predesigned compensation threshold interval includes the first compensation threshold interval, the second compensation threshold interval and the
Three compensation threshold intervals, then it is described when the scene contrast of the current frame image is the first contrast, according to the backlight
Value, it be backlight maximum to determine offset, or, determines the span of offset for corresponding screen area backlight value and backlight most
The step of between big value, also includes：
When the predesigned compensation threshold interval belonging to backlight value is the first compensation threshold interval or the 3rd compensation threshold interval,
It is determined that corresponding offset is backlight maximum；
When the predesigned compensation threshold interval belonging to backlight value is the second compensation threshold interval, the value model of offset is determined
Enclose between corresponding screen area backlight value and backlight maximum.
The embodiment of the invention also discloses a kind of backlight adjusting means of intelligent display device, the intelligent display device tool
There are multiple screen areas, described device includes：
Brightness value acquisition module, for obtaining current frame image when the multiple screen area exports, Ge Geping
The brightness value in curtain region；Wherein, the brightness paricular value is used to characterize contrast；
Backlight value determining module, for the default backlight threshold zone belonging to the brightness value according to current screen region
Between, it is determined that corresponding backlight value；Wherein, the different default backlight threshold interval is to different backlight values；
Variance feature value determining module, for determining the side of current frame image according to the backlight value of each screen area
Poor characteristic value；
Offset determining module, for according to offset corresponding to the backlight value and the determination of Variance feature value；
Backlight illumination adjustment module, for the backlight illumination using backlight value regulation current screen region, and, adopt
The display of next two field picture is adjusted with the offset.
Preferably, the brightness value acquisition module includes：
Brightness value computing module, the brightness value of each pixel for calculating current frame image；
Maximum and mean value calculation module, it is the multiple for being calculated respectively using the brightness value of each pixel
The brightness maxima and average brightness of screen area；
Brightness value obtains module, is averaged for the brightness maxima and brightness respectively for the multiple screen area
Value carries out difference operation, obtains the brightness value of the multiple screen area.
Preferably, the default backlight threshold interval includes the first backlight threshold interval, the second backlight threshold interval, the 3rd
Backlight threshold interval and the 4th backlight threshold interval, the backlight value determining module include：
First backlight value determination sub-module, for being the first backlight when the default backlight threshold interval belonging to brightness value
During threshold interval, determine the span of backlight value between 0 to corresponding screen area average brightness；
Second backlight value determination sub-module, for being the second backlight when the default backlight threshold interval belonging to brightness value
During threshold interval, it is determined that the average brightness of corresponding screen area is backlight value；
3rd backlight value determination sub-module, for being the 3rd backlight when the default backlight threshold interval belonging to brightness value
During threshold interval, the span for determining backlight value is the average brightness of corresponding screen area and the brightness of corresponding screen area
Between maximum；
4th backlight value determination sub-module, for being the 4th backlight when the default backlight threshold interval belonging to brightness value
During threshold interval, it is determined that the brightness maxima of corresponding screen area is backlight value.
Preferably, the Variance feature value determining module includes：
Backlight value acquisition submodule, for obtaining the backlight value of the multiple screen area；
Backlight average value and backlight maximum value calculation submodule, for being calculated using the backlight value of the multiple screen area
The backlight average value and backlight maximum of current frame image；
Variance feature value obtains submodule, for analyzing backlight value and the institute of the multiple screen area using formula of variance
Backlight average value is stated, obtains the Variance feature value of the current frame image.
Preferably, each two field picture has scene contrast, and the scene contrast includes the first contrast, the second contrast
Degree and the 3rd contrast, first contrast are more than second contrast, and second contrast is more than described 3rd pair
Than degree, the offset determining module includes：
Scene contrast judging submodule, for according to the backlight average value and the Variance feature value, judging current
The size of the scene contrast of two field picture；
First offset determination sub-module, for when the scene contrast of the current frame image is the first contrast,
According to the backlight value of the corresponding screen area, it is backlight maximum to determine offset, or, the span of determination offset is
Accordingly between screen area backlight value and backlight maximum；
Second offset determination sub-module, for when the scene contrast of the current frame image is the second contrast,
It is backlight maximum to determine offset；
3rd offset determination sub-module, for when the scene contrast of the current frame image is three contrast,
Determine the span of offset between corresponding screen area backlight value and backlight maximum.
Preferably, the scene contrast judging submodule includes：
Variance feature value judging unit, for judging whether the Variance feature value is more than default characteristic threshold value；
3rd contrast determining unit, for if not, it is determined that the scene contrast of current frame image is the 3rd contrast；
Backlight average value judging unit, for if so, then judging whether the backlight average value is more than default average threshold；
Second contrast determining unit, if for, it is determined that the scene contrast of current frame image is the second contrast；
First than degree determining unit, for if not, it is determined that the scene contrast of current frame image is the first contrast.
Preferably, described first includes than degree determining unit：
Backlight value judgment sub-unit, for judging the predesigned compensation threshold interval belonging to the backlight value.
Preferably, the predesigned compensation threshold interval include first compensation threshold interval, second compensation threshold interval, the 3rd
Threshold interval is compensated, then the first contrast determining unit also includes：
4th offset determination subelement, for being the first compensation threshold value when the predesigned compensation threshold interval belonging to backlight value
When section or the 3rd compensation threshold interval, it is determined that corresponding offset is backlight maximum；
5th offset determination subelement, for being the second compensation threshold value when the predesigned compensation threshold interval belonging to backlight value
During section, determine the span of offset between corresponding screen area backlight value and backlight maximum.
The embodiment of the present invention includes advantages below：
In the embodiment of the present invention, the brightness value of the current frame image of each screen area is calculated, according to current screen
Default backlight threshold interval belonging to regional luminance characteristic value, it is determined that corresponding backlight value, using the backlight side of current frame image
Difference and backlight value, it is determined that corresponding offset；Lighttight more preferable picture effect can be obtained, image saturation can be prevented
Distortion, ensure picture brightness, improve display picture permeability and level of detail, can be more smart according to different image contents
Accurate enhancing picture quality.
Brief description of the drawings
Fig. 1 is a kind of step flow of the backlight adjusting method embodiment one of intelligent display device of the embodiment of the present invention
Figure；
Fig. 2 is that a kind of backlight value and offset using current frame image of the embodiment of the present invention adjusts next two field picture
The program structure diagram of backlight value and offset；
Fig. 3 is a kind of step flow of the backlight adjusting method embodiment two of intelligent display device of the embodiment of the present invention
Figure；
Fig. 4 is a kind of step flow of judgement scene contrast of the embodiment of the present invention；
Fig. 5 is a kind of cut-away view of intelligent display device of the embodiment of the present invention；
Fig. 6 is a kind of adjusting backlight luminance flow chart of embodiment of the present invention of the embodiment of the present invention；
Fig. 7 is a kind of structured flowchart of the backlight adjusting means example IV of intelligent display device of the present invention.
Embodiment
In order to facilitate the understanding of the purposes, features and advantages of the present invention, it is below in conjunction with the accompanying drawings and specific real
Applying mode, the present invention is further detailed explanation.
One of the core concepts of the embodiments of the present invention is, by the bright of the pixel in the current frame image of multiple screen areas
Angle value, calculates to obtain brightness value, the reflection of brightness value be pixel maximum brightness and pixel mean flow rate gap,
What is characterized is the high luminance pixel of picture material and the ratio of low brightness pixel, can represent the luminance contrast of image, for
Offset, using the global analysis to overall current frame image in the embodiment of the present invention, is classified, and institute is determined according to backlight value
Offset is stated, the backlight value and offset of image are judged using the content of current frame image.
Embodiment one
Reference picture 1, show a kind of backlight adjusting method embodiment one of intelligent display device of the embodiment of the present invention
Flow chart of steps, the intelligent display device have multiple screen areas, specifically may include steps of：
Step 101：Current frame image is obtained when the multiple screen area exports, the brightness of each screen area
Value；Wherein, the brightness paricular value is used to characterize contrast；
In the embodiment of the present invention, the intelligent display device can be any use such as computer display, HDTV
Liquid crystal display of the light emitting diode as back light, the embodiment of the present invention do not make any limitation.
By calculating the brightness value of current frame image pixel, the brightness value of each screen area, the acquisition are obtained
Current frame image includes following sub-step when the multiple screen area exports, the step of the brightness value of each screen area
Suddenly：
Step S1011：Calculate the brightness value of each pixel of current frame image；
Step S1012：The brightness for calculating the multiple screen area respectively using the brightness value of each pixel is maximum
Value and average brightness；
Step S1013：The brightness maxima for the multiple screen area and average brightness carry out difference fortune respectively
Calculate, obtain the brightness value of the multiple screen area.
Wherein, the brightness value in step S1011 can be the maximum of triple channel (RGB) color mode hypograph pixel
Value；For example, if image color depth is 8 (bit), the one of pixel of the image is (130,64,82), then takes the pixel
Brightness value of the maximum 130 of point as the pixel.
Further, the above-mentioned brightness value of use calculates the brightness maxima and average brightness of multiple screen areas, institute
Brightness paricular value is stated to be used to characterize contrast；For example, equally under conditions of image color depth is 8 (bit), corresponding screen
There are 2450 pixels in region, wherein, the brightness value for having 500 pixels is 176, and the brightness of other pixels is below
176, then it is assumed that the brightness maxima of the screen area is 176；Similarly, under the conditions described above, corresponding screen can be calculated to obtain
The average brightness of 2450 pixels in region.
Specifically, after the brightness maxima and average brightness of each screen area is calculated, respectively for described
The brightness maxima and average brightness of each screen area carry out difference operation, obtain the brightness of each screen area
Value, for example, the brightness maxima of the screen area is 176, the average brightness of the screen area is 108, then obtains the screen
The brightness value in region is 68；Calculate the brightness value of all screen areas.
Step 102：According to the default backlight threshold interval belonging to the brightness value in current screen region, it is determined that corresponding
Backlight value；Wherein, the different default backlight threshold interval is to different backlight values；
In practical application, the setting of default backlight threshold interval can be set according to corresponding picture depth, for example, scheming
Under conditions of being 8bit as depth.Default backlight threshold interval can be divided into the first backlight threshold interval [0,20), second
Backlight threshold interval [20,80), and the 3rd backlight threshold interval [80,220), the 4th backlight threshold interval [220,255] needs
Bright, above-mentioned differentiation mode is that the embodiment of the present invention is illustrated to a kind of of value for presetting backlight threshold interval, the present invention
Not any limitation to this.On the intelligent display device, it is assumed that the screen of the intelligent display device is divided into N number of screen
Curtain region, N>1, the brightness value of the current frame image shown in current all N number of screen areas is calculated, and it is more all bright
Characteristic value and the size of the end points of the default backlight threshold interval are spent, is judged belonging to the brightness value of N number of screen area
Default backlight threshold interval, can obtain N number of backlight value, for example, it is assumed that the brightness value in current screen region is 68, then sentence
It is the second backlight threshold interval that backlight threshold interval is preset corresponding to the brightness value in settled forth screen region, is repeated above-mentioned
Deterministic process, obtain presetting backlight threshold interval corresponding to multiple brightness values；Further, the embodiment of the present invention is according to institute
State the value that different backlight threshold intervals determines different backlight values.
Step 103：Backlight value according to each screen area determines the Variance feature value of current frame image；
Specifically, the backlight value according to each screen area determines the Variance feature value bag of current frame image
Include following sub-step：
Step S1031：Obtain the backlight value of the multiple screen area；
Step S1032：The backlight average value and the back of the body of current frame image are calculated using the backlight value of the multiple screen area
Light maximum；
Step S1033：The backlight value of the multiple screen area and the backlight average value are analyzed using formula of variance, obtained
Obtain the Variance feature value of the current frame image.
Specifically, after obtaining N number of backlight value, Mean Value Formulas, maximum formula and formula of variance are used to backlight value,
Backlight average value, backlight maximum and the Variance feature value of N number of backlight value is calculated, for example, obtaining 8 backlight values point
It is not：45th, 85,14,96,152,124,240,218, then according to average value Mean Value Formulas, maximum formula and formula of variance,
Backlight average out to 122 is obtained, backlight maximum is 240, and Variance feature value is 5460.
Step 104：According to offset corresponding to the backlight value and the determination of Variance feature value；
In the embodiment of the present invention, the scene contrast of current frame image is judged using backlight average value and Variance feature value,
Wherein, what the scene contrast characterized is the overall brightness of image and the contrast of part, and the scene contrast is divided into the
One contrast, the second contrast, the 3rd contrast, different scene contrasts represent different picture materials, determine present frame
After the scene contrast of image, the scene contrast according to the current frame image determines offset.
Step 105：Using the backlight illumination in backlight value regulation current screen region, and, using the offset
Adjust the display of image.
Wherein, the backlight value is output to corresponding control circuit, carries out the drive control of light emitting diode；Point exposes
Answer the light emitting diode of screen area, the backlight illumination in regulation current screen region；Further, the offset is output to
Corresponding liquid crystal control circuit, next two field picture is compensated point by point, adjust the corresponding next two field picture of screen area
Display.
In the embodiment of the present invention, the brightness value of the current frame image of each screen area is calculated, according to current screen
Default backlight threshold interval belonging to regional luminance characteristic value, it is determined that corresponding backlight value, using the backlight side of current frame image
Difference and backlight value, it is determined that corresponding offset；.
Embodiment two
Reference picture 3, show a kind of backlight adjusting method embodiment two of intelligent display device of the embodiment of the present invention
Flow chart of steps, the intelligent display device have multiple screen areas, specifically may include steps of：
Step 201：Current frame image is obtained when the multiple screen area exports, the brightness of each screen area
Value；Wherein, the brightness paricular value is used to characterize contrast；
In the embodiment of the present invention, on the intelligent display device, the screen of the intelligent display device can be divided
For N number of screen area, N>1, by the brightness value for calculating current frame image pixel, it can be understood as each two field picture is by N number of screen
Curtain region is divided into N number of subgraph, and each screen area has a corresponding subgraph, in other words, obtain N number of screen area
The brightness value in domain can be understood as obtaining the brightness value of N number of corresponding subgraph, and the brightness for obtaining N number of screen area is special
The detailed process of value indicative is：Calculate the brightness value of each pixel of current frame image；Using the brightness value point of each pixel
The brightness maxima and average brightness of N number of screen area are not calculated；It is directed to the brightness of N number of screen area most respectively
Big value and average brightness carry out difference operation, obtain the brightness value of N number of screen area.
For example, brightness value can be the maximum of triple channel (RGB) color mode hypograph pixel；If for example,
Image color depth is 8 (bit), and the one of pixel of the image is (130,64,82), then takes the maximum of the pixel
130 brightness value as the pixel.
Further, the above-mentioned brightness value of use calculates the brightness maxima and average brightness of N number of screen area, example
Such as, equally under conditions of image color depth is 8 (bit), a corresponding screen area has 2450 pixels, its
In, the brightness value for having 500 pixels is 176, and the brightness of other pixels is below 176, then it is assumed that the screen area
Brightness maxima is 176；Similarly, under the conditions described above, can calculate 2450 pixels of corresponding screen area it is bright
Spend average value；After the brightness maxima and average brightness of each screen area is calculated, respectively for each screen
The brightness maxima and average brightness in region carry out difference operation, obtain the brightness value of each screen area, for example, should
The brightness maxima of screen area is 176, and the average brightness of the screen area is 108, then obtains the brightness of the screen area
Characteristic value is 68；The brightness value of N number of screen area is calculated successively.
Step 202：According to the default backlight threshold interval belonging to the brightness value in current screen region, it is determined that corresponding
Backlight value；Wherein, the different default backlight threshold interval is to different backlight values；
It should be noted that the brightness value of the current frame image shown in current all N number of screen areas is calculated, and
Compare all brightness values and the size of the end points of the default backlight threshold interval, judge that the brightness of N number of screen area is special
Default backlight threshold interval belonging to value indicative, can obtain N number of backlight value, further, described in foundation of the embodiment of the present invention not
Same backlight threshold interval determines the value of different backlight values.Then belonging to the brightness value according to current screen region
Default backlight threshold interval, it is determined that the step of corresponding backlight value specifically includes following sub-step：
Sub-step S2021：When the default backlight threshold interval belonging to brightness value is the first backlight threshold interval, really
The span of backlight value is determined between 0 to corresponding screen area average brightness；
Sub-step S2022：When the default backlight threshold interval belonging to brightness value is the second backlight threshold interval, really
The average brightness of fixed corresponding screen area is backlight value；
Sub-step S2023：When the default backlight threshold interval belonging to brightness value is the 3rd backlight threshold interval, really
The span of backlight value is determined between the average brightness of corresponding screen area and the brightness maxima of corresponding screen area；
Sub-step S2024：When the default backlight threshold interval belonging to brightness value is the 4th backlight threshold interval,
It is determined that the brightness maxima of corresponding screen area is backlight value.
For example, the brightness value for obtaining corresponding screen area is 68, and the setting of default backlight threshold interval can
To be set according to corresponding picture depth, for example, under conditions of picture depth is 8bit.Default backlight threshold interval can be with
Be divided into the first backlight threshold interval [0,20), the second backlight threshold interval [20,80), the 3rd backlight threshold interval [80,
220), the 4th backlight threshold interval [220,255] is it should be noted that above-mentioned differentiation mode is the embodiment of the present invention to default
A kind of citing of the value of backlight threshold interval, the present invention limitation not any to this.
For example, when the brightness value of corresponding screen area is 68, the default of corresponding screen area can be obtained
Backlight threshold interval is the second backlight threshold interval, it is determined that the average brightness of corresponding screen area is backlight value, BL=
Localavg, wherein, BL is backlight value, LocalavgFor average brightness；It is 108 to determine backlight value；
When the default backlight threshold interval of corresponding screen area is the first backlight threshold interval, taking for backlight value is determined
It is worth scope between 0 to corresponding screen area average brightness, backlight value is further determined according to below equation：BL=
aLocalavg, wherein, BL is backlight value, LocalavgFor average brightness, a is the first regulatory factor, and a is less than 1 and more than 0, and
Set according to user's request；
When the default backlight threshold interval of corresponding screen area is the 3rd backlight threshold interval, taking for backlight value is determined
It is worth scope between the average brightness of corresponding screen area and the brightness maxima of corresponding screen area, further according to following
Formula determines backlight value：BL=Localavg+a*Diff+b*Diff2, wherein, BL is backlight value, LocalavgIt is averaged for brightness
Value, Diff be brightness value, and a be the first regulatory factor, and b is the second regulatory factor, and a, b are less than 1 and are more than 0, and according to
Family demand is set；
When the default backlight threshold interval of corresponding screen area is the 4th backlight threshold interval, taking for backlight value is determined
It is worth scope between the average brightness of corresponding screen area and the brightness maxima of corresponding screen area, determines backlight value：BL
=Localmax, wherein, BL is backlight value, LocalmaxFor brightness maxima.
Step 203：According to the backlight average value and the Variance feature value, the scene contrast of current frame image is judged
Size；
Reference picture 4, show a kind of step flow chart for judging scene contrast.It is described according to the backlight average value with
The Variance feature value, judging the size of the scene contrast of current frame image includes following sub-step：
Sub-step S2031：Judge whether the Variance feature value is more than default characteristic threshold value；
Sub-step S2032：If not, it is determined that the scene contrast of current frame image is the 3rd contrast；
Sub-step S2033：If so, then judging whether the backlight average value is more than default average threshold；
Sub-step S2034：If, it is determined that the scene contrast of current frame image is the second contrast；
Sub-step S2035：If not, it is determined that the scene contrast of current frame image is the first contrast.
Wherein, the scene contrast includes the first contrast, the second contrast and the 3rd contrast, first contrast
Degree is more than second contrast, and second contrast is more than the 3rd contrast,
In the embodiment of the present invention, after the N number of backlight value for determining N number of screen area, the back of the body of current frame image is further obtained
Light average value and Variance feature value, and according to backlight average value and Variance feature value, judge the scene contrast of current frame image
Size.
Wherein, the size between Variance feature value and default characteristic threshold value is judged, if Variance feature value is less than default feature
Threshold value, the scene contrast for determining current frame image is the 3rd contrast, and Variance feature value is phenogram as overall contrast
The characteristic value of height, when Variance feature value is less than expected characteristic threshold value, represents that image overall contrast is not high, belong to general figure
Image field scape；Under conditions of Variance feature value is more than expected characteristic threshold value, the backlight average value of current frame image is determined whether
With the relation of default average threshold, when the backlight average value of current frame image is more than default average threshold, illustrate current frame image
Overall brightness it is higher, the scene contrast for determining current frame image is the second contrast, illustrates the scene of current frame image
Overall brightness it is high and there is high-contrast, for example, current frame image be a width morning just from the sun of Horizon rise, it is described
Image construction overall brightness is high and scene with high-contrast；The backlight average value of current frame image is less than default average
During threshold value, illustrating the overall brightness of current frame image than relatively low, the scene contrast for determining current frame image is the first contrast,
Illustrate that the overall brightness of the scene of current frame image is relatively low and have high-contrast, for example, current frame image is a width seashore
The sun at high noon, but there is a rock of black lower section, described image constitute that overall brightness is higher and field with high-contrast
Scape.
Step 204：When the scene contrast of the current frame image is the first contrast, according to the corresponding screen area
The backlight value in domain, it is backlight maximum to determine offset, or, the span of determination offset is corresponding screen area backlight value
Between backlight maximum；
Sub-step S2041：Judge the predesigned compensation threshold interval belonging to the backlight value；
Sub-step S2042：When the predesigned compensation threshold interval belonging to backlight value is that the first compensation threshold interval or the 3rd mend
When repaying threshold interval, it is determined that corresponding offset is backlight maximum；
Sub-step S2043：When the predesigned compensation threshold interval belonging to backlight value is the second compensation threshold interval, it is determined that mending
The span of value is repaid between corresponding screen area backlight value and backlight maximum.
Wherein, when the scene contrast of the current frame image is the first contrast, offset, which can classify, to be mended
Repay, such as, it can be determined that the predesigned compensation threshold interval belonging to backlight value；
When the predesigned compensation threshold interval belonging to backlight value is the first compensation threshold interval or the 3rd compensation threshold interval,
It is determined that corresponding offset is backlight maximum, offset BLcom(i)=BLmax, wherein, BLcom(i) it is corresponding screen area
Offset, BLmaxFor backlight maximum；In order to obtain more black picture effect.So now need not be by the brightness portion of reduction
Point improved by offset, it is only necessary to which as small as possible compensation is a part of, ensures the dark place of picture not light leak, prevents picture from occurring
Saturation distortion.
When the predesigned compensation threshold interval belonging to backlight value is the second compensation threshold interval, the span of offset is determined
Between corresponding screen area backlight value and backlight maximum, further determine that offset is
Wherein, BLcom(i) it is the offset of i-th screen area, BL (i) is the backlight value of i-th of screen area, BLmax_NFor backlight
Maximum, now, it is necessary to which the luminance part largely reduced is improved by offset more than brightness of image level, ensure simultaneously
Highlighted part is unsaturated.
Step 205：When the scene contrast of the current frame image is the second contrast, determine offset for backlight most
Big value；
Wherein, when judging the scene contrast of current frame image for the second contrast, it is backlight maximum to determine offset,
Offset is BLcom(i)=BLmax, wherein, BLcom(i) it is the offset of corresponding screen area, BLmaxFor backlight maximum；Cause
Overall brightness for the scene of current frame image is high and has high-contrast, it is necessary to ensure that highlighted part is unsaturated, so
Compensated using overall backlight maximum, prevent image from the situation of saturation distortion occur.
Step 206：When the scene contrast of the current frame image is three contrast, the value of offset is determined
Scope is between corresponding screen area backlight value and backlight maximum；
Wherein, when judging the scene contrast of current frame image for three contrasts, the span for determining offset is
Accordingly between screen area backlight value and backlight maximum, it is possible to further further determine that offset according to below equation：Wherein, BLcom(i) it is the offset of i-th of screen area, BL (i) is i-th of screen
The backlight value in region, BLmax_NFor backlight maximum, now brightness of image level is more, it is necessary to the luminance part that will largely reduce
Improved by offset, while ensure that highlighted part is unsaturated, while ensure picture brightness.
Step 207：Using the backlight illumination in backlight value regulation current screen region, and, using the offset
Adjust the display of image.
Wherein, the backlight value is output to corresponding control circuit, carries out the drive control of light emitting diode；Point exposes
Answer the light emitting diode of screen area, the backlight illumination in regulation current screen region；Further, the offset is output to
Corresponding liquid crystal control circuit, next two field picture is compensated point by point, adjust the corresponding next two field picture of screen area
Display.
In the embodiment of the present invention, after judging backlight value corresponding to default backlight threshold interval using brightness value, enter one
Step judges the scene contrast of general image, and the scene contrast is divided into three levels：First contrast, the second contrast
Degree and the 3rd contrast, can determine backlight value and offset according to the overall brightness in current frame image and contrast, can be with
Lighttight more preferable picture effect is obtained, image saturation distortion can be prevented, ensures picture brightness, it is penetrating to improve display picture
Property and level of detail.
Embodiment three
To make those skilled in the art more fully understand the embodiment of the present invention, carried on the back below by way of using backlight value and offset regulation
The specific example of brightness illustrates.
Reference picture 5, a kind of cut-away view of intelligent display device is shown, including being placed on liquid crystal panel
The back light group 1 of (LCD, Liquid Crystal Display) single side or double side, show the liquid crystal surface of video image
Plate 2, the luminous pwm circuit of control backlight determination value, determines backlight value and offset circuit, video converter, BLC
Circuit, liquid crystal control circuit, and the connection of each circuit.Wherein side backlight is divided into N number of back of the body that can individually control
Light group, region corresponding on LCD is controlled respectively, as 1,2 in figure ... ... shown in N bar dotted lines.The backlight value that each region is illuminated
Determined according to this algorithm, while determine the offset of illuminated area, compensated for follow-up BLC circuit, compensation circuit
According to offset carry out image compensation highlight, eliminate because backlight dim after caused by image it is dimmed, high dynamic on LCD show
Show picture.
Reference picture 6, show a kind of adjusting backlight luminance flow chart of embodiment of the present invention, specific handling process such as Fig. 5
It is shown, according to the pixel value inputted point by point, calculate the brightness value of each pixel of current frame image；Using each pixel
Brightness value calculates the brightness maxima and average brightness of the multiple screen area respectively；Further determine that the back of the body in this section of region
Light value, space filtering and time filtering, the backlight eliminated spatially for then carrying out backlight value successively are uneven and temporal
Backlight flicker problem, backlight value is finally output to pwm control circuit, carries out LED drive controls, illuminate backlight leds
(LED, Light Emitting Diode) unit, while BLC signal electricity is output to according to the true offset of backlight value surely
Road, judge whether thermal compensation signal is 1, shown if directly view data is output on LCD and carries out image, if it is not, will then mend
Repay value input and be compensated signal, be then output on LCD and shown after progress image compensation point by point.
It should be noted that for embodiment of the method, in order to be briefly described, therefore it is all expressed as to a series of action group
Close, but those skilled in the art should know, the embodiment of the present invention is not limited by described sequence of movement, because according to
According to the embodiment of the present invention, some steps can use other orders or carry out simultaneously.Secondly, those skilled in the art also should
Know, embodiment described in this description belongs to preferred embodiment, and the involved action not necessarily present invention is implemented
Necessary to example.
It should be noted that for embodiment of the method, in order to be briefly described, therefore it is all expressed as to a series of action group
Close, but those skilled in the art should know, the embodiment of the present invention is not limited by described sequence of movement, because according to
According to the embodiment of the present invention, some steps can use other orders or carry out simultaneously.Secondly, those skilled in the art also should
Know, embodiment described in this description belongs to preferred embodiment, and the involved action not necessarily present invention is implemented
Necessary to example.
Example IV
Reference picture 7, show a kind of structural frames of the backlight adjusting means example IV of intelligent display device of the present invention
Figure, the intelligent display device have multiple screen areas, can specifically include following module：
Brightness value acquisition module 301, it is each for obtaining current frame image when the multiple screen area exports
The brightness value of screen area；Wherein, the brightness paricular value is used to characterize contrast；
Backlight value determining module 302, for the default backlight threshold value belonging to the brightness value according to current screen region
Section, it is determined that corresponding backlight value；Wherein, the different default backlight threshold interval is to different backlight values；
Variance feature value determining module 303, for determining current frame image according to the backlight value of each screen area
Variance feature value；
Offset determining module 304, for according to offset corresponding to the backlight value and the determination of Variance feature value；
Backlight illumination adjustment module 305, for adjusting the backlight illumination in current screen region using the backlight value, with
And the display of next two field picture is adjusted using the offset.
In a kind of preferred embodiment of the embodiment of the present invention, the brightness value acquisition module includes：
Brightness value computing module, the brightness value of each pixel for calculating current frame image；
Maximum and mean value calculation module, for calculating the multiple screen respectively using the brightness value of each pixel
The brightness maxima and average brightness in curtain region；
Brightness value obtains module, is averaged for the brightness maxima and brightness respectively for the multiple screen area
Value carries out difference operation, obtains the brightness value of the multiple screen area.
The default backlight threshold interval includes the first backlight threshold interval, the second backlight threshold interval, the 3rd backlight threshold
It is worth section and the 4th backlight threshold interval, the backlight value determining module includes：
First backlight value determination sub-module, for being the first backlight when the default backlight threshold interval belonging to brightness value
During threshold interval, determine the span of backlight value between 0 to corresponding screen area average brightness；
Second backlight value determination sub-module, for being the second backlight when the default backlight threshold interval belonging to brightness value
During threshold interval, it is determined that the average brightness of corresponding screen area is backlight value；
3rd backlight value determination sub-module, for being the 3rd backlight when the default backlight threshold interval belonging to brightness value
During threshold interval, the span for determining backlight value is the average brightness of corresponding screen area and the brightness of corresponding screen area
Between maximum；
4th backlight value determination sub-module, for being the 4th backlight when the default backlight threshold interval belonging to brightness value
During threshold interval, it is determined that the brightness maxima of corresponding screen area is backlight value.
The Variance feature value determining module includes：
Backlight value acquisition submodule, for obtaining the backlight value of the multiple screen area；
Backlight average value and backlight maximum value calculation submodule, for being calculated using the backlight value of the multiple screen area
The backlight average value and backlight maximum of current frame image；
Variance feature value obtains submodule, for analyzing backlight value and the institute of the multiple screen area using formula of variance
Backlight average value is stated, obtains the Variance feature value of the current frame image.
In a kind of preferred embodiment of the embodiment of the present invention, each two field picture has scene contrast, the scene comparison
Degree includes the first contrast, the second contrast and the 3rd contrast, and first contrast is more than second contrast, described
Second contrast is more than the 3rd contrast, and the offset determining module includes：
Scene contrast judging submodule, for according to the backlight average value and the Variance feature value, judging current
The size of the scene contrast of two field picture；
First offset determination sub-module, for when the scene contrast of the current frame image is the first contrast,
According to the backlight value of the corresponding screen area, it is backlight maximum to determine offset, or, the span of determination offset is
Accordingly between screen area backlight value and backlight maximum；
Second offset determination sub-module, for when the scene contrast of the current frame image is the second contrast,
It is backlight maximum to determine offset；
3rd offset determination sub-module, for when the scene contrast of the current frame image is three contrast,
Determine the span of offset between corresponding screen area backlight value and backlight maximum.
The scene contrast judging submodule includes：
Variance feature value judging unit, for judging whether the Variance feature value is more than default characteristic threshold value；
3rd contrast determining unit, for if not, it is determined that the scene contrast of current frame image is the 3rd contrast；
Backlight average value judging unit, for if so, then judging whether the backlight average value is more than default average threshold；
Second contrast determining unit, if for, it is determined that the scene contrast of current frame image is the second contrast；
First than degree determining unit, for if not, it is determined that the scene contrast of current frame image is the first contrast.
In a kind of preferred embodiment of the embodiment of the present invention, described first includes than degree determining unit：
Backlight value judgment sub-unit, for judging the predesigned compensation threshold interval belonging to the backlight value.
In a kind of preferred embodiment of the embodiment of the present invention, the predesigned compensation threshold interval includes the first compensation threshold zone
Between, the second compensation threshold interval, the 3rd compensation threshold interval, then described first also includes than degree determining unit：
4th offset determination subelement, for being the first compensation threshold value when the predesigned compensation threshold interval belonging to backlight value
When section or the 3rd compensation threshold interval, it is determined that corresponding offset is backlight maximum；
5th offset determination subelement, for being the second compensation threshold value when the predesigned compensation threshold interval belonging to backlight value
During section, determine the span of offset between corresponding screen area backlight value and backlight maximum.
For device embodiment, because it is substantially similar to embodiment of the method, so description is fairly simple, it is related
Part illustrates referring to the part of embodiment of the method.
Each embodiment in this specification is described by the way of progressive, what each embodiment stressed be with
The difference of other embodiment, between each embodiment identical similar part mutually referring to.
It should be understood by those skilled in the art that, the embodiment of the embodiment of the present invention can be provided as method, apparatus or calculate
Machine program product.Therefore, the embodiment of the present invention can use complete hardware embodiment, complete software embodiment or combine software and
The form of the embodiment of hardware aspect.Moreover, the embodiment of the present invention can use one or more wherein include computer can
With in the computer-usable storage medium (including but is not limited to magnetic disk storage, CD-ROM, optical memory etc.) of program code
The form of the computer program product of implementation.
The embodiment of the present invention is with reference to method according to embodiments of the present invention, terminal device (system) and computer program
The flow chart and/or block diagram of product describes.It should be understood that can be by computer program instructions implementation process figure and/or block diagram
In each flow and/or square frame and the flow in flow chart and/or block diagram and/or the combination of square frame.These can be provided
Computer program instructions are set to all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing terminals
Standby processor is to produce a machine so that passes through computer or the processor of other programmable data processing terminal equipments
The instruction of execution is produced for realizing in one flow of flow chart or multiple flows and/or one square frame of block diagram or multiple square frames
In the device of function specified.
These computer program instructions, which may be alternatively stored in, can guide computer or other programmable data processing terminal equipments
In the computer-readable memory to work in a specific way so that the instruction being stored in the computer-readable memory produces bag
The manufacture of command device is included, the command device is realized in one flow of flow chart or multiple flows and/or one side of block diagram
The function of being specified in frame or multiple square frames.
These computer program instructions can be also loaded into computer or other programmable data processing terminal equipments so that
Series of operation steps is performed on computer or other programmable terminal equipments to produce computer implemented processing, so that
The instruction performed on computer or other programmable terminal equipments is provided for realizing in one flow of flow chart or multiple flows
And/or specified in one square frame of block diagram or multiple square frames function the step of.
Although having been described for the preferred embodiment of the embodiment of the present invention, those skilled in the art once know base
This creative concept, then other change and modification can be made to these embodiments.So appended claims are intended to be construed to
Including preferred embodiment and fall into having altered and changing for range of embodiment of the invention.
Finally, it is to be noted that, herein, such as first and second or the like relational terms be used merely to by
One entity or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or operation
Between any this actual relation or order be present.Moreover, term " comprising ", "comprising" or its any other variant meaning
Covering including for nonexcludability, so that process, method, article or terminal device including a series of elements are not only wrapped
Those key elements, but also the other element including being not expressly set out are included, or is also included for this process, method, article
Or the key element that terminal device is intrinsic.In the absence of more restrictions, wanted by what sentence "including a ..." limited
Element, it is not excluded that other identical element in the process including the key element, method, article or terminal device also be present.
Above to a kind of method provided by the present invention and a kind of device, it is described in detail, tool used herein
Body example is set forth to the principle and embodiment of the present invention, and the explanation of above example is only intended to help and understands this
The method and its core concept of invention；Meanwhile for those of ordinary skill in the art, according to the thought of the present invention, specific
There will be changes in embodiment and application, in summary, this specification content should not be construed as to the present invention's
Limitation.
Claims (16)
1. a kind of backlight adjusting method of intelligent display device, it is characterised in that the intelligent display device has multiple screens
Region, including：
Current frame image is obtained when the multiple screen area exports, the brightness value of each screen area；Wherein, it is described
Brightness paricular value is used to characterize contrast；
According to the default backlight threshold interval belonging to the brightness value in current screen region, it is determined that corresponding backlight value；Wherein,
The different default backlight threshold interval is to different backlight values；
Backlight value according to each screen area determines the Variance feature value of current frame image；
According to offset corresponding to the backlight value and the determination of Variance feature value；
Using the backlight illumination in backlight value regulation current screen region, and, the aobvious of image is adjusted using the offset
Show.
2. according to the method for claim 1, it is characterised in that the acquisition current frame image is in the multiple screen area
Include during output, the step of the brightness value of each screen area：
Calculate the brightness value of each pixel of current frame image；
Calculate the brightness maxima and average brightness of the multiple screen area respectively using the brightness value of each pixel；
The brightness maxima for the multiple screen area and average brightness carry out difference operation respectively, obtain the multiple
The brightness value of screen area.
3. method according to claim 1 or 2, it is characterised in that the default backlight threshold interval includes the first backlight
Threshold interval, the second backlight threshold interval, the 3rd backlight threshold interval and the 4th backlight threshold interval, it is described according to current screen
Default backlight threshold interval belonging to the brightness value in region, it is determined that the step of corresponding backlight value includes：
When the default backlight threshold interval belonging to brightness value is the first backlight threshold interval, the value model of backlight value is determined
Enclose and arrived for 0 between the average brightness of corresponding screen area；
When the default backlight threshold interval belonging to brightness value is the second backlight threshold interval, it is determined that corresponding screen area
Average brightness is backlight value；
When the default backlight threshold interval belonging to brightness value is the 3rd backlight threshold interval, the value model of backlight value is determined
Enclose between the average brightness of corresponding screen area and the brightness maxima of corresponding screen area；
When the default backlight threshold interval belonging to brightness value is the 4th backlight threshold interval, it is determined that corresponding screen area
Brightness maxima is backlight value.
4. according to the method for claim 1, it is characterised in that the backlight value according to each screen area determines
The step of Variance feature value of current frame image, includes：
Obtain the backlight value of the multiple screen area；
The backlight average value and backlight maximum of current frame image are calculated using the backlight value of the multiple screen area；
The backlight value of the multiple screen area and the backlight average value are analyzed using formula of variance, obtain the present frame figure
The Variance feature value of picture.
5. the method according to claim 1 or 4, it is characterised in that each two field picture has scene contrast, the scene
Contrast includes the first contrast, the second contrast and the 3rd contrast, first contrast and is more than second contrast,
Second contrast is more than the 3rd contrast, described to determine corresponding compensate according to the backlight value and Variance feature value
The step of value, includes：
According to the backlight average value and the Variance feature value, the size of the scene contrast of current frame image is judged；
When the scene contrast of the current frame image is the first contrast, according to the backlight value of the corresponding screen area,
It is backlight maximum to determine offset, or, determines that the span of offset is maximum with backlight for corresponding screen area backlight value
Between value；
When the scene contrast of the current frame image is the second contrast, it is backlight maximum to determine offset；
When the scene contrast of the current frame image is three contrast, the span for determining offset is corresponding screen
Between region backlight value and backlight maximum.
6. according to the method for claim 5, it is characterised in that described according to the backlight average value and the Variance feature
Value, judge current frame image scene contrast size the step of include：
Judge whether the Variance feature value is more than default characteristic threshold value；
If not, it is determined that the scene contrast of current frame image is the 3rd contrast；
If so, then judging whether the backlight average value is more than default average threshold；
If, it is determined that the scene contrast of current frame image is the second contrast；
If not, it is determined that the scene contrast of current frame image is the first contrast.
7. according to the method for claim 5, it is characterised in that the scene contrast when the current frame image is the
During one contrast, according to the backlight value of the corresponding screen area, it is backlight maximum to determine offset, or, determines offset
Span between corresponding screen area backlight value and backlight maximum the step of include：
Judge the predesigned compensation threshold interval belonging to the backlight value.
8. the method according to claim 5 or 7, it is characterised in that the predesigned compensation threshold interval includes the first compensation
Threshold interval, the second compensation threshold interval and the 3rd compensation threshold interval, then it is described when the scene comparison of the current frame image
Spend for the first contrast when, according to the backlight value, it is backlight maximum to determine offset, or, determine offset value model
The step of enclosing between corresponding screen area backlight value and backlight maximum also includes：
When the predesigned compensation threshold interval belonging to backlight value is the first compensation threshold interval or the 3rd compensation threshold interval, it is determined that
Corresponding offset is backlight maximum；
When the predesigned compensation threshold interval belonging to backlight value is the second compensation threshold interval, the span for determining offset is
Accordingly between screen area backlight value and backlight maximum.
9. the backlight adjusting means of a kind of intelligent display device, it is characterised in that the intelligent display device has multiple screens
Region, including：
Brightness value acquisition module, for obtaining current frame image when the multiple screen area exports, each screen area
The brightness value in domain；Wherein, the brightness paricular value is used to characterize contrast；
Backlight value determining module, for the default backlight threshold interval belonging to the brightness value according to current screen region, really
Backlight value corresponding to fixed；Wherein, the different default backlight threshold interval is to different backlight values；
Variance feature value determining module, for determining that the variance of current frame image is special according to the backlight value of each screen area
Value indicative；
Offset determining module, for according to offset corresponding to the backlight value and the determination of Variance feature value；
Backlight illumination adjustment module, for the backlight illumination using backlight value regulation current screen region, and, using institute
State the display that offset adjusts next two field picture.
10. device according to claim 9, it is characterised in that the brightness value acquisition module includes：
Brightness value computing module, the brightness value of each pixel for calculating current frame image；
Maximum and mean value calculation module, for calculating the multiple screen area respectively using the brightness value of each pixel
The brightness maxima and average brightness in domain；
Brightness value obtains module, enters for the brightness maxima and average brightness respectively for the multiple screen area
Row difference operation, obtain the brightness value of the multiple screen area.
11. the device according to claim 9 or 10, it is characterised in that the default backlight threshold interval includes first back of the body
Photo threshold section, the second backlight threshold interval, the 3rd backlight threshold interval and the 4th backlight threshold interval, the backlight value determine
Module includes：
First backlight value determination sub-module, for being the first backlight threshold value when the default backlight threshold interval belonging to brightness value
During section, determine the span of backlight value between 0 to corresponding screen area average brightness；
Second backlight value determination sub-module, for being the second backlight threshold value when the default backlight threshold interval belonging to brightness value
During section, it is determined that the average brightness of corresponding screen area is backlight value；
3rd backlight value determination sub-module, for being the 3rd backlight threshold value when the default backlight threshold interval belonging to brightness value
During section, determine that the span of backlight value is maximum for the average brightness of corresponding screen area and the brightness of corresponding screen area
Between value；
4th backlight value determination sub-module, for being the 4th backlight threshold value when the default backlight threshold interval belonging to brightness value
During section, it is determined that the brightness maxima of corresponding screen area is backlight value.
12. device according to claim 9, it is characterised in that the Variance feature value determining module includes：
Backlight value acquisition submodule, for obtaining the backlight value of the multiple screen area；
Backlight average value and backlight maximum value calculation submodule, it is current for being calculated using the backlight value of the multiple screen area
The backlight average value and backlight maximum of two field picture；
Variance feature value obtains submodule, for analyzing the backlight value of the multiple screen area and the back of the body using formula of variance
Light average value, obtain the Variance feature value of the current frame image.
13. the device according to claim 9 or 12, it is characterised in that each two field picture has scene contrast, the field
Scape contrast includes the first contrast, the second contrast and the 3rd contrast, and first contrast is more than the described second contrast
Degree, second contrast are more than the 3rd contrast, and the offset determining module includes：
Scene contrast judging submodule, for according to the backlight average value and the Variance feature value, judging present frame figure
The size of the scene contrast of picture；
First offset determination sub-module, for when the scene contrast of the current frame image is the first contrast, foundation
The backlight value of the corresponding screen area, it is backlight maximum to determine offset, or, the span of determination offset is corresponding
Between screen area backlight value and backlight maximum；
Second offset determination sub-module, for when the scene contrast of the current frame image is the second contrast, it is determined that
Offset is backlight maximum；
3rd offset determination sub-module, for when the scene contrast of the current frame image is three contrast, it is determined that
The span of offset is between corresponding screen area backlight value and backlight maximum.
14. device according to claim 13, it is characterised in that the scene contrast judging submodule includes：
Variance feature value judging unit, for judging whether the Variance feature value is more than default characteristic threshold value；
3rd contrast determining unit, for if not, it is determined that the scene contrast of current frame image is the 3rd contrast；
Backlight average value judging unit, for if so, then judging whether the backlight average value is more than default average threshold；
Second contrast determining unit, if for, it is determined that the scene contrast of current frame image is the second contrast；
First than degree determining unit, for if not, it is determined that the scene contrast of current frame image is the first contrast.
15. device according to claim 13, it is characterised in that described first includes than degree determining unit：
Backlight value judgment sub-unit, for judging the predesigned compensation threshold interval belonging to the backlight value.
16. the device according to claim 13 or 15, it is characterised in that the predesigned compensation threshold interval includes first and mended
Threshold interval is repaid, the second compensation threshold interval, the 3rd compensates threshold interval, then the first contrast determining unit also includes：
4th offset determination subelement, for being the first compensation threshold interval when the predesigned compensation threshold interval belonging to backlight value
Or during the 3rd compensation threshold interval, it is determined that corresponding offset is backlight maximum；
5th offset determination subelement, for being the second compensation threshold interval when the predesigned compensation threshold interval belonging to backlight value
When, determine the span of offset between corresponding screen area backlight value and backlight maximum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610643750.XA CN107689215B (en) | 2016-08-05 | 2016-08-05 | Backlight adjusting method and device of intelligent display equipment |
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| CN109887468A (en) * | 2019-04-02 | 2019-06-14 | 合肥工业大学 | A kind of liquid crystal display dynamic light adjustment method based on image local feature |
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