CN104299600B - Image display device and image optimization method thereof - Google Patents
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Abstract
A kind of image display device and image optimization method thereof.Image display device includes analysis of image content device, luminance compensation device and image optimization processor.Analysis of image content device receives view data and environmental light brightness, and produces backlight illumination adjusted value according to view data and environmental light brightness.Luminance compensation device produces image data illumination adjusted value according to backlight illumination adjusted value, and adjusts the brightness of view data to produce the first view data according to image data illumination adjusted value.Image optimization processor produces saturation according to image data illumination adjusted value and adjusts weight.Image optimization processor also adjusts the brightness of the first view data to produce output view data according to saturation adjustment weight.
Description
Technical field
The present invention relates to a kind of image display device, and particularly to a kind of image carrying out image optimization
Display device.
Background technology
Along with becoming increasingly popular of electronic product, provide the display device of high quality to become on the electronic device and set
The important topic of meter person.For coordinating the demand of electronic installation mobile, no matter user needs at any ring
Under border, the electronic installation that high-quality shows can be provided.
In known technical field, display device can adjust the back of the body according to the ambient brightness of local environment
Brightness produced by optical module.But, in relatively bright outdoor environment, in order to resist the reflection of high light
Effect, brightness produced by backlight module is often transferred to the brightness of maximum, causes the wave of power consumption
Take.Additionally, in order to efficient solution saves power consumption, it is known that the display device of technology can be by heightening display figure
The mode of the brightness of picture, makes brightness produced by backlight module moderately to downgrade.
But, the simple brightness heightening display image, the quality showing image can be made to produce and such as to make an uproar
Sound becomes the phenomenon of the in poor quality of big and color distortion, has influence on the visual effect that display device is presented.Cause
How this, take into account display quality and power consumption, the problem paid attention to by this area designer.
Summary of the invention
The present invention provides a kind of image display device, the view data after brightness adjustment can be carried out image excellent
Change action, uses lifting display quality.
The present invention also provides for a kind of image optimization method being applicable to image display device, can be to brightness adjustment
After view data carry out image optimization action, use lifting display quality.
The image display device of the present invention includes analysis of image content device, luminance compensation device and image optimization
Processor.Analysis of image content device receives view data and environmental light brightness, and according to view data with
And environmental light brightness produces backlight illumination adjusted value.Luminance compensation device couples analysis of image content device, and depends on
Image data illumination adjusted value is produced according to backlight illumination adjusted value, and according to image data illumination adjusted value
Adjust the brightness of view data to produce the first view data.Image optimization processor couples luminance compensation
Device, produces saturation according to image data illumination adjusted value and adjusts weight.Image optimization processor also depends on
Adjust weight according to saturation and adjust the brightness of the first view data to produce output view data.
In one embodiment of this invention, above-mentioned image optimization processor also calculate output view data with
Brightness amplification between the first view data, and calculate the details degree of variation of output view data.Image optimization
Processor and foundation brightness amplification and details degree of variation adjust output view data with defeated after producing adjustment
Go out view data.
In one embodiment of this invention, above-mentioned image optimization processor calculates output view data and the
The luminance difference of one view data obtains brightness amplification.
In one embodiment of this invention, above-mentioned output view data includes multiple pixel data.Image
Optimized processor calculates the brightness value of each pixel data multiple neighborhood pixels data neighbouring with each pixel data
Difference obtain details degree of variation.
In one embodiment of this invention, above-mentioned image optimization processor is according to brightness amplification and brightness
Amplification weighting function obtains brightness correction weighted value.Image optimization processor and according to details degree of variation with
And details variation weighting function obtains details variation and revises weighted value.
In one embodiment of this invention, above-mentioned image optimization processor according to brightness correction weighted value with
And details variation revise weighted value and obtain details correction weight.Image optimization processor foundation are thin
Joint is revised weight and is adjusted output view data to export view data after producing adjustment.
In one embodiment of this invention, above-mentioned image optimization processor adjusts weight letter according to saturation
Number and image data illumination adjusted value produce saturation and adjust weight.Wherein, saturation adjust weight with
Image data illumination adjusted value is inversely proportional to.
The kind image optimization method of the present invention is applicable to image display device.Step therein includes: receive
View data and environmental light brightness, and produce backlight illumination tune according to view data and environmental light brightness
Whole value；Image data illumination adjusted value is produced again according to backlight illumination adjusted value, and according to view data
Brightness adjustment value adjusts the brightness of view data to produce the first view data；Further, according to picture number
Produce saturation according to brightness adjustment value and adjust weight, and adjust the first figure according to saturation adjustment weight
As the brightness of data is to produce output view data.
Based on above-mentioned, the image display device of the present invention is further directed to adjust according to the adjustment of backlight illumination
The brightness of whole view data, and increase the adjustment action that the view data after adjusting is carried out saturation, to enter
One-step optimization image to display, promotes the display usefulness of image display device.
For the features described above of the present invention and advantage can be become apparent, special embodiment below, and coordinate
Accompanying drawing is described in detail below.
Accompanying drawing explanation
Fig. 1 illustrates the schematic diagram of the image display device 100 of one embodiment of the invention.
Fig. 2 illustrates the curve chart of the saturation adjustment weighting function of the embodiment of the present invention.
Fig. 3 illustrates the schematic diagram of the brightness amplification weighting function of the embodiment of the present invention.
Fig. 4 then illustrates the schematic diagram of the details variation weighting function of the embodiment of the present invention.
Fig. 5 illustrates the flow chart of the image optimization method of the embodiment of the present invention.
[symbol description]
100: image display device
110: analysis of image content device
120: luminance compensation device
130: image optimization processor
ENL: environmental light brightness
BLT: backlight illumination adjusted value
IMG1: the first view data
IMGD: view data
IMGO: output view data
DY: brightness adjustment value
210～230,310,410: curve
S510～S530: image optimization step
Detailed description of the invention
Refer to the schematic diagram that Fig. 1, Fig. 1 illustrate the image display device 100 of one embodiment of the invention.
Image display device 100 includes analysis of image content device 110, luminance compensation device 120 and image optimization
Processor 130.Analysis of image content device 110 receives view data IMGD and environmental light brightness ENL.
Analysis of image content device 110 produces backlight illumination according to view data IMGD and environmental light brightness ENL
Adjusted value BLT.
Backlight illumination adjusted value BLT is transferred into the luminance compensation coupled with analysis of image content device 110 phase
Device 120.Luminance compensation device 120 produces image data illumination according to backlight illumination adjusted value BLT and adjusts
Value and image data illumination adjust ratio.Luminance compensation device 120 foundation image data illumination adjusted value
And image data illumination adjusts ratio and adjusts the brightness of view data IMGD to produce the first picture number
According to IMG1.The brightest, with view data IMGD include the first coloured light view data RIN,
As a example by dichroscope view data GIN and tertiary color light image data BIN, luminance compensation device 120 also depends on
Produce image data illumination adjusted value dY according to backlight illumination adjusted value BLT and image data illumination is adjusted
Whole ratio RATIO, and generation includes the first coloured light view data RIN1, the second coloured light view data according to this
GIN1 and the first view data IMG1 of tertiary color light image data BIN1.Wherein, the first coloured light
View data RIN1, the second coloured light view data GIN1 and the meter of tertiary color light image data BIN1
Shown in calculation mode such as following formula (1):
RIN1=RATIO × RIN+dY
GIN1=RATIO × GIN+dY
BIN1=RATIO × BIN+dY (1)
As a example by backlight illumination adjusted value BLT is used for turning down the backlight illumination of image display device 100, figure
It is more than the value of 1 and in order to heighten view data as data luminance adjustment ratio RATIO can be one
The brightness of IMGD is to produce the first view data IMG1.Image data illumination adjusted value dY then can use
Decide whether to adjust the saturation of view data IMGD.Wherein, as image data illumination adjusted value dY
During more than 0, represent that the saturation of view data IMGD can be turned down；When image data illumination adjusted value
When dY is less than 0, represent that the saturation of view data IMGD can be raised；And when image data illumination is adjusted
When whole value dY is equal to 0, represent that the saturation of view data IMGD will not be adjusted.
Image optimization processor 130 couples luminance compensation device 120.Image optimization processor 130 is according to figure
Weight W_sat is adjusted as data luminance adjusted value dY produces saturation.Image optimization processor 130 is also
According to the saturation that calculated adjust weight W_sat adjust the brightness of the first view data IMG1 with
Produce output view data IMGO.Wherein, saturation can be calculated acquisition by following formula (2):
The computing of the maximum of numerical value during wherein Max represents the bracket taking its correspondence, Min takes its correspondence
The computing of the minima of numerical value in bracket.
Below referring to Fig. 1 and Fig. 2, wherein, Fig. 2 illustrates the saturation of the embodiment of the present invention
Adjust the curve chart of weighting function.Above-mentioned saturation adjusts weight W_sat can be by satisfying that Fig. 2 illustrates
Adjust weighting function with degree to obtain.In fig. 2, curve 210 represents that data luminance adjusted value dY is big
Brightness of image in 0 time adjusts the relation curve of weight W_sat with saturation；Curve 220 represents data
Brightness of image when brightness adjustment value dY is equal to 0 adjusts the relation curve of weight W_sat with saturation；
Brightness of image when curve 230 then represents data luminance adjusted value dY less than 0 adjusts power with saturation
The relation curve of weight W_sat.Curve 210～230 all can adjust weight along with brightness of image toward saturation
The W_sat position convergence equal to 1.It is to say, when saturation adjusts weight W_sat more than 1,
The saturation of view data IMGD can be strengthened, when saturation adjusts weight W_sat equal to 1, image
The saturation of data IMGD keeps constant；When saturation adjusts weight W_sat less than 1, can reduce
The saturation of view data IMGD.Saturation adjusts weight W_sat and adjusts with the brightness of view data IMGD
Whole value is inversely proportional to.
Image optimization processor 130 can calculate saturation in the way of arithmetical operation according to formula (2) and adjust
Whole weight W_sat.Certainly, the curve 210～230 in Fig. 2 adjusts weight W_sat about saturation
Can also be recorded in one or more look-up table with the relation of brightness.Image optimization processor 130 is also
Saturation can be found out by this look-up table and adjust weight W_sat.
On the other hand, adjust weight W_sat according to saturation and calculate the side of view data IMGO
Formula can have been come with the relational expression (3) that saturation adjusts weight W_sat by following output view data IMGO
Become:
Wherein, RO, GO and BO are the image of the output three coloured light included by view data IMGO
Data.Certainly, image optimization processor 130 arithmetical operation of direct progressive form (3) can obtain output
View data IMGO, image optimization processor 130 or can also according to formula (3) set up record output figure
As data IMGO, the first view data IMG1 and saturation adjust the look-up table of weight W_sat,
And to adjust weight W_sat to produce output view data according to saturation according to the look-up table set up
IMGO。
On the other hand, image optimization processor 130 can be carried out more for output view data IMGO
Further adjust action.Wherein, image optimization processor 130 also calculates output view data IMGO
And brightness amplification dY2 between the first view data IMG1, and, image optimization processor 130 is also counted
Calculate the details degree of variation of output view data IMGO.Image optimization processor 130 is again according to brightness amplification
DY2 and details degree of variation export view data after producing adjustment.
It should be noted that brightness amplification dY2 can calculate output figure by image optimization processor 130
As the luminance difference of data IMGO and the first view data IMG1 obtains.Details degree of variation is the most permissible
Calculated for the multiple pixel datas included by output view data IMGO by image optimization processor 130
Carry out calculating obtaining.Wherein, image optimization processor 130 can calculate respectively this pixel data with respectively should
The difference of the brightness value of the neighborhood pixels data that pixel data is neighbouring obtains details degree of variation.
Below referring to Fig. 1, Fig. 3 and Fig. 4, wherein Fig. 3 illustrates the brightness increasing of the embodiment of the present invention
The schematic diagram of width weighting function, Fig. 4 then illustrates the signal of the details variation weighting function of the embodiment of the present invention
Figure.It is bright that the curve 310 that Fig. 3 illustrates represents that the brightness amplification weighting function of the embodiment of the present invention is presented
Degree amplification and the relation curve of brightness amplification weight, wherein, the brightness amplification shown by curve 310 is with bright
Degree amplification weight is inversely proportional to.Image optimization processor 130 can be by curve 310 according to being counted
Brightness amplification dY2 calculated is to calculate brightness amplification weight.In the illustrating of Fig. 4, curve 410 is then
The details degree of variation that the details variation weighting function of the expression embodiment of the present invention is presented and details variation weight
Relation curve, wherein, the details degree of variation shown by curve 410 and details variation weight is to be directly proportional,
And when details degree of variation is excessive, details variation weight can level off to a stationary value.
Additionally, image optimization processor 130 can be by the details variation weight obtained and brightness amplification power
Heavily carry out being added to produce details correction weight, and come output view data by details correction weight
IMGO is adjusted adjusting output view data IMGTO to produce.
Image optimization processor 130 can be adjusted exporting the generation of view data IMGTO according to formula (4),
Formula (4) is as follows:
RTO=RO+dY2 × EDW
GTO=GO+dY2 × EDW
BTO=BO+dY2 × EDW (4)
Wherein, RTO, GTO and BTO are the output three coloured light included by view data IMGTO
View data, EDW is then details correction weight.
Hereinafter refer to the flow chart that Fig. 5, Fig. 5 illustrate the image optimization method of the embodiment of the present invention.Figure
As the step of optimization method includes: in step S510, receive view data and environmental light brightness, and
Backlight illumination adjusted value is produced according to view data and environmental light brightness；Then, in step S520,
Produce image data illumination adjusted value according to backlight illumination adjusted value, and adjust according to image data illumination
Value adjusts the brightness of view data to produce the first view data；Finally, in step S530, foundation
Image data illumination adjusted value produces saturation and adjusts weight, and adjusts according to saturation adjustment weight
The brightness of the first view data is to produce output view data.
About the part of the action details of the present embodiment, have in detail in aforesaid embodiment and embodiment
Explanation, below pardon do not repeat.
In sum, the present invention carries out outside the brightness adjustment of view data not only for backlight illumination adjusted value,
Also can take into account the saturation of image to carry out the adjustment of view data.Consequently, it is possible to display device except
Keyholed back plate can be carried out to save outside electric energy for the brightness of backlight module, also take into account the quality that image shows,
Effectively reach the effect saved and impact optimizes.
Claims (13)
1. an image display device, including:
One analysis of image content device, receives a view data and an environmental light brightness, according to this picture number
According to this and this environmental light brightness produces a backlight illumination adjusted value；
One luminance compensation device, couples this analysis of image content device, produces according to this backlight illumination adjusted value
One image data illumination adjusted value and an image data illumination adjust ratio, and bright according to this view data
Degree adjusted value and this image data illumination adjust ratio and adjust the brightness of this view data to produce one first
View data；And
One image optimization processor, couples this luminance compensation device, comes according to this image data illumination adjusted value
Producing a saturation and adjust weight, this image optimization processor also adjusts according to this saturation adjustment weight
The brightness of this first view data is to produce an output view data.
2. image display device as claimed in claim 1, wherein this image optimization processor also calculates this
A brightness amplification between output view data and this first view data, and calculate this output view data
One details degree of variation, this image optimization processor and adjusting according to this brightness amplification and this details degree of variation
This output view data whole is to export view data after producing an adjustment.
3. image display device as claimed in claim 2, wherein to calculate this defeated for this image optimization processor
Go out the view data luminance difference with this first view data to obtain this brightness amplification.
4. image display device as claimed in claim 2, wherein this output view data includes multiple picture
Prime number evidence, this image optimization processor calculates multiple neighbours that respectively this pixel data is neighbouring with respectively this pixel data
The difference of the brightness value of nearly pixel data obtains this details degree of variation.
5. image display device as claimed in claim 2, wherein this image optimization processor is bright according to this
Degree amplification and a brightness amplification weighting function obtain a brightness correction weighted value, and this image optimization processes
Device also obtains a details variation correction weight according to this details degree of variation and details variation weighting function
Value.
6. image display device as claimed in claim 5, wherein this image optimization processor is bright according to this
Degree revise weighted value and this details variation revise weighted value and obtain a details correction weight, this figure
As optimized processor and according to this details correction weight adjust this output view data to produce this adjustment after
Output view data.
7. image display device as claimed in claim 1, wherein this image optimization processor is satisfied according to one
Adjust weighting function and this image data illumination adjusted value with degree to produce this saturation and adjust weight, wherein,
This saturation adjusts weight and is inversely proportional to this image data illumination adjusted value.
8. an image optimization method, it is adaptable to image display device, including:
Receive a view data and an environmental light brightness, according to this view data and this environmental light brightness
Produce a backlight illumination adjusted value；
Produce an image data illumination adjusted value according to this backlight illumination adjusted value and a view data is bright
Degree adjustment ratio, and adjust according to this image data illumination adjusted value and this image data illumination adjustment ratio
The brightness of this view data whole is to produce one first view data；And
Produce a saturation according to this image data illumination adjusted value and adjust weight, and according to this saturation
Adjust weight and adjust the brightness of this first view data to produce an output view data.
9. image optimization method as claimed in claim 8, the most also includes:
Calculate the brightness amplification between this output view data and this view data；
Calculate a details degree of variation of this output view data；And
This output view data is adjusted to produce an adjustment according to this brightness amplification and this details degree of variation
Rear output view data.
10. image optimization method as claimed in claim 9, the most also includes:
Calculate this output view data luminance difference with this view data to obtain this brightness amplification.
11. image optimization methods as claimed in claim 9, wherein, this output view data includes multiple
Pixel data, this image optimization method also includes:
Calculate respectively this pixel data and the brightness value of the multiple neighborhood pixels data neighbouring with respectively this pixel data
Difference obtain this details degree of variation.
12. image optimization methods as claimed in claim 9, wherein, adjust weight according to this saturation and come
The brightness adjusting this first view data includes with the step producing this output view data:
A brightness correction weighted value is obtained according to this brightness amplification and a brightness amplification weighting function；
Obtain a details variation according to this details degree of variation and details variation weighting function and revise weight
Value；And
Make a variation according to this brightness correction weighted value and this details that revise weighted value and adjust this output figure
As data are to export view data after producing this adjustment.
13. image optimization methods as claimed in claim 8, wherein, adjust according to this image data illumination
Value produces the step of this saturation adjustment weight and includes:
Adjust weighting function according to a saturation and this image data illumination adjusted value produces this saturation and adjusts
Whole weight,
Wherein, this saturation adjustment weight is inversely proportional to this image data illumination adjusted value.
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| US10019925B2 (en) * | 2015-08-06 | 2018-07-10 | Mediatek Inc. | Electronic device capable of displaying and performing color compensation and color compensation method |
| TWI568266B (en) | 2016-01-27 | 2017-01-21 | 明基電通股份有限公司 | Image adjusting method and related displaying apparatus |
| CN105489193B (en) * | 2016-01-29 | 2018-08-24 | 明基智能科技（上海）有限公司 | Image regulating method and display equipment |
| KR102588126B1 (en) * | 2016-11-01 | 2023-10-13 | 삼성전자주식회사 | Display driver integrated circuit and display driving system including the same |
| CN109493831B (en) * | 2018-12-05 | 2021-06-04 | 海信视像科技股份有限公司 | Image signal processing method and device |
| CN113140197B (en) * | 2021-04-21 | 2023-05-05 | Oppo广东移动通信有限公司 | Display screen adjusting method and device, electronic equipment and readable storage medium |
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