CN106847150A - Adjust the device and method of brightness of display screen - Google Patents
Adjust the device and method of brightness of display screen Download PDFInfo
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- 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
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Abstract
The invention discloses a kind of device and method for adjusting brightness of display screen.The method for adjusting brightness of display screen includes：S1, it is calculated when image normally shows, the first relation of the brightness value of image and the brightness value of display screen；S2, the image segmentation for obtaining preview are into multiple regions；S3, the first brightness value for being calculated each region；S4, judge whether described image needs to carry out image procossing；If so, then carrying out image procossing；S5, it is calculated first brightness value and after treatment the second relation of the second brightness value of image；S6, the display brightness of display screen is adjusted according to first relation and second relation.The brightness of the monochrome information real-time adjustment display screen of the picture that the device and method of regulation brightness of display screen of the invention can shoot according to user, finally be presented to the best picture effect of user, significantly improve Consumer's Experience.
Description
Technical field
The invention belongs to display technology field, specifically, it is related to a kind of device and method for adjusting brightness of display screen.
Background technology
With continuing to develop for electronic technology, digital product increasingly presses close to the life of people.The thing followed is people
More convenient enjoyments are constantly pursued, atmosphere is more entertained.Camera in mobile phone is the Killer of current medium and high classes mobile phone
Using, and photographing module can camera phones application growth rate more more than digital camera application growth rate, it is contemplated that with
Growth rate afterwards can be higher, develops rapider.At the same time, people are also more next to the functional requirement of mobile phone photograph, preview
It is higher.
Current mobile phone gradually replaces traditional digital camera, as the indispensable equipment of user's trip.It is this platform factory
Business, manufacturer terminal, sensor manufacturers all constantly improve the quality of the camera of mobile phone, and more preferable user's body is brought to user
Test.Existing to have many methods for improving picture of mobile telephone quality, such as extreme color (increase monochrome object and shoot picture luminance
Method), bright region (when having large area clear zone, adjustment AE exposure, prevent dark space owe expose), dark
Region (when having many dark spaces, adjusting AE (exposing unit), prevent dark space overexposure) etc..Due to the screen intensity of mobile phone
It is fixed, the method for these regulation picture luminances is finally simply reflected on photo, it is impossible in real time on a display screen to user
Reflection camera adjusts the effect of picture, even if causing the brightness that cell-phone camera head module increased dark space, but mobile phone is aobvious
The brightness of display screen is still very dark, it is impossible to see regulating effect of the picture processing module to picture, or mobile phone display screen in real time
Very bright, picture processing module inhibits the overexposure effect of picture, but is presented on the real-time pictures on mobile phone display screen or mistake
Expose, had a strong impact on the experience of user.
The content of the invention
In order to solve above-mentioned problems of the prior art, can be according to user it is an object of the invention to provide one kind
The device and method of the regulation brightness of display screen of the brightness of the monochrome information real-time adjustment display screen of the picture of shooting.
The invention provides a kind of method for adjusting brightness of display screen, it includes：
S1, it is calculated when image normally shows, the first relation of the brightness value of image and the brightness value of display screen；
S2, the image segmentation for obtaining preview are into multiple regions；
S3, the first brightness value for being calculated each region；
S4, judge whether described image needs to carry out image procossing；If so, then carrying out image procossing；
S5, it is calculated first brightness value and after treatment the second relation of the second brightness value of image；
S6, the display brightness of display screen is adjusted according to first relation and second relation.
Further, S4 includes：
The first brightness value according to each region is come to mark each region be clear zone or dark space；
Calculate the quantity labeled as clear zone；
Judge the quantity in the clear zone whether more than the first given threshold or less than the second given threshold, first setting
Threshold value is more than the second given threshold；
If the quantity in the clear zone is more than the first given threshold, exposure index is reduced, if the quantity in the clear zone is less than
Second given threshold, then improve exposure index.
Further, the first brightness value according to each region is come to mark each region be the method for clear zone or dark space
Including：
Whether first brightness value in each region is judged more than the first brightness reference value or less than the second brightness reference value, its
In, first brightness reference value is more than second brightness reference value；
If first brightness value is more than first brightness reference value, it is clear zone to mark the region；If described first
Brightness value is less than second brightness reference value, then it is dark space to mark the region.
Further, after S1 the step of, also includes：
Calculate the Color Channel quantity of each color；
Judge whether the Color Channel quantity more than individual color channel threshold value；If so, then reducing exposure index, and perform
Step S5.
Further, when image shows it is normal when, the relation of the brightness value of image and the brightness value of display screen is：Y_LCD
=Y_camera × K；
Wherein, Y_LCD is the display brightness of display screen, and Y_camera is the brightness for shooting picture, and K is a constant.
Further, after carrying out image procossing, then the first brightness value of raw image and after treatment the of image
The relation of two brightness values is：Y_camera_current/Y_camera_next=S；
Wherein, Y_camera_current is the first brightness value of raw image, and camera_next is for after treatment
Second brightness value of image, S is a constant.
Further, after carrying out image procossing, the display brightness value of display screen is：Y_LCD=Y_camera × K × S.
Present invention also offers a kind of device for adjusting brightness of display screen, using regulation brightness of display screen as described above
Method adjusts the brightness of display screen, and the device of the regulation brightness of display screen includes：First computing module, for being calculated
When image normally shows, the first relation of the brightness value of image and the brightness value of display screen；Image segmentation module, for by advance
Look at the image segmentation that obtains into multiple regions；Second computing module, the first brightness value for being calculated each region；First
Judge module, for judging whether described image needs to carry out image procossing；Image processing module, to image
Reason；3rd computing module, for being calculated first brightness value and after treatment the second of the second brightness value of image
Relation；Luminance adjustment module, the display brightness for adjusting display screen according to first relation and second relation.
Further, described image processing module includes that indexing unit, exposing unit, the first computing unit and first judge
Unit；It is clear zone or dark space that the indexing unit marks each region for first brightness value in each region according to；
First computing unit is used to calculate the quantity labeled as clear zone；First judging unit is used to judge the number in the clear zone
Whether more than the first given threshold or less than the second given threshold, first given threshold is more than the second given threshold to amount, if
The quantity in the clear zone is more than the first given threshold, then the exposing unit reduction exposure index, if the quantity in the clear zone is small
In the second given threshold, then the exposing unit raising exposes index.
Further, the indexing unit includes the second judging unit and execution flag unit, wherein, preset the first brightness
Reference value and the second brightness reference value, first brightness reference value are more than second brightness reference value, and described second judges
Whether unit is used to judge first brightness value in each region more than first brightness reference value or less than second brightness
Reference value；If first brightness value is more than first brightness reference value, the execution flag unit marks the region to be
Clear zone；If first brightness value is less than second brightness reference value, it is dark that the execution flag unit marks the region
Area.
Beneficial effects of the present invention：What the device and method of regulation brightness of display screen of the invention can shoot according to user
The brightness of the monochrome information real-time adjustment display screen of picture, finally be presented to the best picture effect of user, significantly improve
Consumer's Experience.
Brief description of the drawings
By the following description carried out with reference to accompanying drawing, above and other aspect of embodiments of the invention, feature and advantage
Will become clearer, in accompanying drawing：
Fig. 1 is the module diagram of the device of the regulation brightness of display screen of present pre-ferred embodiments.
The step of Fig. 2 is the method for the regulation brightness of display screen of present pre-ferred embodiments flow chart.
Specific embodiment
Hereinafter, with reference to the accompanying drawings to describing embodiments of the invention in detail.However, it is possible to come real in many different forms
Apply the present invention, and the present invention should not be construed as limited to the specific embodiment that illustrates here.Conversely, there is provided these implementations
Example is in order to explain principle of the invention and its practical application, so that others skilled in the art are it will be appreciated that of the invention
Various embodiments and the various modifications for being suitable for specific intended application.Identical label can be used in entire disclosure and accompanying drawing
Represent identical element.
Fig. 1 is the module diagram of the device of the regulation brightness of display screen of present pre-ferred embodiments.
Reference picture 1, the device for adjusting brightness of display screen according to embodiments of the present invention, including the first computing module 10, figure
As segmentation module 20, the second computing module 30, the first judge module 40, the first image processing module 50, the second image procossing mould
Block 60, the 3rd computing module 70, luminance adjustment module 80.
First computing module 10 is used to be calculated when image normally shows, the brightness of the brightness value and display screen of image
First relation of value.
Image segmentation module 20 is used for the image segmentation that obtains preview into multiple regions.
Second computing module 30 is used to be calculated first brightness value in each region.
First judge module 40 is used to judge whether described image needs to carry out image procossing.
First image processing module 50 is used to process image.First image processing module 50 includes indexing unit
51st, exposing unit 55, the first computing unit 53 and the first judging unit 54.Indexing unit 51 is used for according to each region
First brightness value come mark each region be clear zone or dark space；First computing unit 53 is used to calculate the number labeled as clear zone
Amount；Whether first judging unit 54 is used to judge the quantity in the clear zone more than given threshold, if so, then the exposure is single
Unit 55 reduces exposure index, if it is not, then the exposing unit 55 improves exposure index.
Indexing unit 51 includes the second judging unit 511 and execution flag unit 512, wherein, preset the first brightness references
Value and the second brightness reference value, first brightness reference value are more than second brightness reference value, second judging unit
511 are used to judge whether first brightness value in each region to join more than first brightness reference value or less than second brightness
Examine value；If first brightness value is more than first brightness reference value, the described mark of execution flag unit 512 region is
Clear zone；If first brightness value is less than second brightness reference value, the described mark of execution flag unit 512 region is
Dark space.
Second image processing module 60 includes the second computing unit 61 and the 3rd judging unit 62.A default individual color channel threshold
Value.Second computing unit 61 is used to calculate the Color Channel quantity of each color.3rd judging unit 62 is used to judge whether
In the presence of the Color Channel quantity more than the individual color channel threshold value；If so, then the reduction of exposing unit 55 exposes index；If it is not, then
Perform other operations.
3rd computing module 70 is used to be calculated first brightness value and after treatment the second brightness value of image
The second relation.
The display that luminance adjustment module 80 is used for according to first relation and second relation to adjust display screen is bright
Degree.
The step of Fig. 2 is the method for the regulation brightness of display screen of present pre-ferred embodiments flow chart.
With reference to referring to Figures 1 and 2, present invention also offers a kind of method for adjusting brightness of display screen, the regulation display screen
The method of brightness includes：
In step 210, it is calculated when image normally shows, the of the brightness value of image and the brightness value of display screen
One relation.Specifically, when image shows it is normal when, the relation of the brightness value of image and the brightness value of display screen is：Y_LCD=Y_
camera×K；Wherein, Y_LCD is the display brightness of display screen, and Y_camera is the brightness for shooting picture, and K is a constant.K values
Realization can be calibrated by a normal pictures and LCD, a picture for the not overexposure of standard is exactly chosen, the mark is tested out
The brightness of quasi- picture, and the brightness of normal screen preview is compared, so as to calculate K values.
Herein, it is calculated when image normally shows using the first computing module 10, the brightness value of image and display
First relation of the brightness value of screen.
In a step 220, the image segmentation for preview being obtained is into multiple regions.Specifically, picture is divided into N × N number of area
Domain.Herein, N can be 4~30 with value.In the present embodiment, N is preferably 16.Herein, will using image segmentation module 20
The image segmentation that preview is obtained is into multiple regions.In this example, it is assumed that detection obtains Y_LCD for 200, Y_camera is
100, it is 2 to be calculated K.
In step 230, it is calculated first brightness value in each region.Herein, using the second computing module 30 come
It is calculated first brightness value in each region.
In step 240, judge whether described image needs to carry out image procossing.If so, image procossing is then carried out, and after
It is continuous to perform step 250；If it is not, then performing other operations.Herein, whether described image is judged using the first judge module 40
Need to carry out image procossing.Image is processed using image processing module.
Specifically, step 240 specifically includes following steps：
In step 241, the first brightness value according to each region is come to mark each region be clear zone or dark space.
Here, each region is marked for clear zone or dark space come first brightness value in each region according to using indexing unit 51.
In step 242, the quantity labeled as clear zone is calculated.Herein, mark is calculated using the first computing unit 53
It is the quantity in clear zone.
In step 243, judge the quantity in the clear zone whether more than the first given threshold or less than the second given threshold.
If the quantity in the clear zone is more than the first given threshold, step 244 is performed, if the quantity in the clear zone is less than the second setting threshold
Value, then perform step 245.Herein, whether it is used to judge the quantity in the clear zone more than first using the first judging unit 54
Given threshold or less than the second given threshold.It should be noted that assuming that the first given threshold can be 15~30, second with value
Given threshold can be 1~15 with value.In the present embodiment, the first given threshold is preferably 20, and the second given threshold is preferably
10。
In step 244, exposure index is reduced.Herein, using the reduction exposure index of exposing unit 55.
In step 245, exposure index is improved.Herein, exposure index is improved using exposing unit 55.
Further, the first brightness value according to each region come mark each region be clear zone or dark space (step
241) method includes：
In step 201, judge first brightness value in each region whether more than the first brightness reference value or less than second
Brightness reference value；If so, i.e. described first brightness value is more than first brightness reference value, then step 203 is performed, if it is not, i.e.
First brightness value is less than second brightness reference value, then perform step 203.Wherein, preset the first brightness reference value and
Second brightness reference value, first brightness reference value is more than second brightness reference value.It is assumed herein that the first brightness is joined
It can be 100~150 with value to examine value.Second brightness reference value can be 80~100 with value.In the present embodiment, the first brightness
Reference value is preferably 120, and the second brightness reference value is preferably 80.
In step 202., it is clear zone to mark the region.
In step 203, then it is dark space to mark the region.
Additionally, also including following operation after step 210：
In step 271, the Color Channel quantity of each color is calculated.Herein, using the second computing unit 61 come
Calculate the Color Channel quantity of each color.
In step 272, the Color Channel quantity more than individual color channel threshold value is judged whether.If so, then performing step
Rapid 273, if it is not, then performing step 274.Wherein, the individual color channel threshold value is preset.The individual color channel threshold value can be with value
0~255.In the present embodiment, the individual color channel threshold value is preferably 150.Herein, judged using the 3rd judging unit 62
With the presence or absence of the Color Channel quantity more than the individual color channel threshold value.
In step 273, exposure index is reduced, and continue executing with step 250.
In step 274, other operations are performed.
In step 250, first brightness value and after treatment the second of the second brightness value of image are calculated
Relation.Herein, first brightness value and after treatment the second of image are calculated using the 3rd computing module 70
Second relation of brightness value.
In step 260, the display brightness of display screen is adjusted according to first relation and second relation.At this
In, the display brightness of display screen is adjusted according to first relation and second relation using luminance adjustment module 80.
Specifically, after carrying out image procossing, then the first brightness value of raw image and after treatment the second of image
The relation of brightness value is：Y_camera_current/Y_camera_next=S；Wherein, Y_camera_current is not locate
The first brightness value of image is managed, camera_next is the second brightness value of image after treatment, and S is a constant.In this implementation
In example, it is assumed that first brightness value (Y_camera_curren) of raw image is 100, and the second of image is bright after treatment
Angle value (camera_next) is 170, and it is 0.58823529 to be calculated S.
At this moment, the display brightness value of display screen is：Y_LCD=Y_camera × K × S, wherein K are that 2, Y_camera is
100, S is 0.58823529.That is, the display brightness value (Y_LCD)=117.647058 of display screen can be calculated.
It is emphasized that the parameter value chosen above is only one embodiment of the present of invention, it is to be entered by specific embodiment
The one step description present invention, but the present invention is not restricted to this.
Specifically, K and S parameter value are calculated, and after being calculated the brightness value that display screen should show, CPU will be counted
The brightness value that the display screen for obtaining should show is sent to display screen, so that the brightness of control display screen, is presented preferably figure
Piece effect.It should be noted that the present embodiment can in real time adjust the brightness of display screen in preview image, it is also possible to set
The brightness of adjustment screen when only under image taking, can so save system power supply and improve the runnability of system.
In sum, the picture that the device and method of the regulation brightness of display screen of the embodiment of the present invention can shoot user
Monochrome information, CPU is passed in real time, CPU finally be presented to according to the brightness of the monochrome information real-time adjustment display screen
The best picture effect of user, significantly improves Consumer's Experience.
Although the present invention has shown and described with reference to specific embodiment, it should be appreciated by those skilled in the art that：
In the case where the spirit and scope of the present invention limited by claim and its equivalent are not departed from, can carry out herein form and
Various change in details.
Claims (10)
1. it is a kind of adjust brightness of display screen method, it is characterised in that including：
S1, it is calculated when image normally shows, the first relation of the brightness value of image and the brightness value of display screen；
S2, the image segmentation for obtaining preview are into multiple regions；
S3, the first brightness value for being calculated each region；
S4, judge whether described image needs to carry out image procossing；If so, then carrying out image procossing；
S5, it is calculated first brightness value and after treatment the second relation of the second brightness value of image；
S6, the display brightness of display screen is adjusted according to first relation and second relation.
2. it is according to claim 1 regulation brightness of display screen method, it is characterised in that S4 includes：
The first brightness value according to each region is come to mark each region be clear zone or dark space；
Calculate the quantity labeled as clear zone；
Judge the quantity in the clear zone whether more than the first given threshold or less than the second given threshold, first given threshold
More than the second given threshold；
If the quantity in the clear zone is more than the first given threshold, exposure index is reduced, if the quantity in the clear zone is less than second
Given threshold, then improve exposure index.
3. the method for regulation brightness of display screen according to claim 2, it is characterised in that according to the of each region
One brightness value includes for the method for clear zone or dark space marking each region：
Whether first brightness value in each region is judged more than the first brightness reference value or less than the second brightness reference value, wherein,
First brightness reference value is more than second brightness reference value；
If first brightness value is more than first brightness reference value, it is clear zone to mark the region；If first brightness
Value is less than second brightness reference value, then it is dark space to mark the region.
4. the method for the regulation brightness of display screen according to claim 1 or 2 or 3, it is characterised in that the step of after S1 also
Including：
Calculate the Color Channel quantity of each color；
Judge whether the Color Channel quantity more than individual color channel threshold value；If so, then reducing exposure index, and perform step
S5。
5. it is according to claim 1 regulation brightness of display screen method, it is characterised in that when image show it is normal when, scheme
The relation of the brightness value of picture and the brightness value of display screen is：Y_LCD=Y_camera × K；
Wherein, Y_LCD is the display brightness of display screen, and Y_camera is the brightness for shooting picture, and K is a constant.
6. it is according to claim 1 regulation brightness of display screen method, it is characterised in that after carrying out image procossing, then not
Process the first brightness value of image and the relation of the second brightness value of image is after treatment：Y_camera_current/Y_
Camera_next=S；
Wherein, Y_camera_current is the first brightness value of raw image, and camera_next is image after treatment
The second brightness value, S be a constant.
7. it is according to claim 1 regulation brightness of display screen method, it is characterised in that after carrying out image procossing, display
The display brightness value of screen is：Y_LCD=Y_camera × K × S.
8. it is a kind of adjust brightness of display screen device, using described in any one of claim 1 to 7 regulation brightness of display screen side
Method adjusts the brightness of display screen, it is characterised in that the device of the regulation brightness of display screen includes：
First computing module, for being calculated when image normally shows, the brightness value of image and the brightness value of display screen
First relation；
Image segmentation module, for the image segmentation that obtains preview into multiple regions；
Second computing module, the first brightness value for being calculated each region；
First judge module, for judging whether described image needs to carry out image procossing；
Image processing module, for processing image；
3rd computing module, for being calculated first brightness value and after treatment the second of the second brightness value of image
Relation；
Luminance adjustment module, the display brightness for adjusting display screen according to first relation and second relation.
9. it is according to claim 8 regulation brightness of display screen device, it is characterised in that described image processing module includes
Indexing unit, exposing unit, the first computing unit and the first judging unit；
It is clear zone or dark space that the indexing unit marks each region for first brightness value in each region according to；Institute
State the first computing unit for calculate be labeled as clear zone quantity；First judging unit is used to judge the quantity in the clear zone
Whether more than the first given threshold or less than the second given threshold, first given threshold is more than the second given threshold, if institute
The quantity in clear zone is stated more than the first given threshold, then the exposing unit reduction exposes index, if the quantity in the clear zone is less than
Second given threshold, the then exposing unit raising exposes index.
10. the device of regulation brightness of display screen according to claim 9, it is characterised in that the indexing unit includes the
Two judging units and execution flag unit, wherein, preset the first brightness reference value and the second brightness reference value, first brightness
Reference value be more than second brightness reference value, second judging unit be used for judge each region the first brightness value whether
More than first brightness reference value or less than second brightness reference value；
If first brightness value is more than first brightness reference value, it is bright that the execution flag unit marks the region
Area；If first brightness value is less than second brightness reference value, it is dark space that the execution flag unit marks the region.
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| CN111630839A (en) * | 2018-07-26 | 2020-09-04 | 华为技术有限公司 | Image processing method and device |
| CN113837990A (en) * | 2021-06-11 | 2021-12-24 | 荣耀终端有限公司 | Noise monitoring method, electronic equipment, chip system and storage medium |
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