CN110428783B - Image display method and device - Google Patents
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- CN110428783B CN110428783B CN201910770675.7A CN201910770675A CN110428783B CN 110428783 B CN110428783 B CN 110428783B CN 201910770675 A CN201910770675 A CN 201910770675A CN 110428783 B CN110428783 B CN 110428783B
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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
- G09G3/3406—Control of illumination source
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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
- G09G3/3406—Control of illumination source
- G09G3/3413—Details of control of colour illumination sources
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- G—PHYSICS
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
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Abstract
The application discloses a method and a device for displaying images, wherein the method comprises the following steps: receiving an input image, dividing the image into a plurality of first sub-regions, and respectively calculating the average value of the brightness corresponding to each first sub-region; determining at least one second sub-area, of the plurality of first sub-areas, in which the average value of the brightness is smaller than a preset brightness threshold; determining a correlation factor corresponding to each second sub-area based on a preset starting and controlling depth, a preset brightness threshold and an average value of brightness corresponding to each second sub-area in the at least one second sub-area; compensating the average value of the brightness corresponding to each second sub-area based on the association factor to obtain a compensated brightness value; and adjusting the backlight value corresponding to each second sub-area based on the compensated brightness value, and displaying the image based on the adjusted backlight value. The technical problem of poor image display effect in the prior art is solved.
Description
Technical Field
The present application relates to the field of image display technologies, and in particular, to a method and an apparatus for displaying an image.
Background
Liquid Crystal Displays (LCDs) are widely used in home appliances, mobile, monitoring and airborne, and aviation devices, and occupy a dominant position in flat panel Display devices. However, the conventional LCD has the disadvantages of low power consumption and contrast, resulting in poor display effect of the LCD. In order to improve the energy efficiency and contrast ratio of the liquid crystal display, the display brightness of the display is usually adjusted to enhance the contrast ratio between the darkest area and the brightest area in the image, so as to enrich the gradation in the image.
At present, in a liquid crystal display, a technology for enhancing contrast ratio is mainly an area backlight technology, wherein the area backlight technology mainly includes two technologies, one is to control the conduction time of a light emitting diode in a backlight source to control the brightness of the light emitting diode, and the other is to control the current magnitude of the light emitting diode in the backlight source to control the brightness of the light emitting diode. In the prior art, whether the on-time of the light emitting diode is controlled or the current of the light emitting diode is controlled to adjust the brightness of the light emitting diode, generally, the lower the brightness average value of a display area is, the lower the brightness of the light emitting diode is, so that the display level of an image is poor in a dark field environment, and the display effect of the image is reduced.
Disclosure of Invention
The application provides an image display method and device, which are used for solving the technical problem of poor image display effect in the prior art.
In a first aspect, the present application provides a method of image display, the method comprising: receiving an input image, dividing the image into a plurality of first sub-regions, and respectively calculating the average value of the brightness corresponding to each first sub-region;
determining at least one second sub-area, of the plurality of first sub-areas, in which the average value of the brightness is smaller than a preset brightness threshold;
determining a correlation factor corresponding to each second sub-region based on a preset starting and controlling depth, a preset brightness threshold and an average value of brightness corresponding to each second sub-region in the at least one second sub-region, wherein the correlation factor represents a compensation amplitude of a brightness value of each second sub-region;
compensating the average value of the brightness corresponding to each second sub-area based on the correlation factor corresponding to each second sub-area to obtain a compensated brightness value;
and adjusting the backlight value corresponding to each second sub-area based on the compensated brightness value, and displaying the image based on the adjusted backlight value.
In the scheme provided by the embodiment of the application, a received image is divided into a plurality of first sub-regions, an average value of brightness of each first sub-region is respectively determined, a second sub-region with the average value of brightness smaller than a preset brightness threshold value is selected from the plurality of first sub-regions, a correlation factor corresponding to each second sub-region is determined based on a preset starting control depth, the preset brightness threshold value and the average value of brightness of each second sub-region, the average value of brightness of the region is compensated based on the correlation factor of each second sub-region to obtain a compensated brightness value, a backlight value of each second sub-region is adjusted based on the compensated brightness value, and the image is displayed based on the backlight value. Therefore, in the scheme provided by the embodiment of the application, the luminance value of the dark area in the image is compensated through the correlation factor, and the backlight value of the dark area is adjusted based on the compensated luminance value, so that the image display hierarchy is increased, and the image display effect is improved.
Optionally, the correlation factor is represented by a piecewise function or by a Pulse Width Modulation (PWM) duty cycle.
Optionally, the correlation factor is represented by a piecewise function, including:
the correlation factor is represented by the following piecewise function:
wherein K represents a correlation factor; a represents a preset control starting depth; y represents the average of the luminance of any of the second sub-regions; y is1Representing a preset brightness threshold.
Optionally, the correlation factor is represented by a piecewise function, including:
the correlation factor is represented by the following piecewise function:
wherein K represents a correlation factor; a represents a preset control starting depth; y represents the average of the luminance of any of the second sub-regions; y is1Representing a preset brightness threshold; p represents a preset power bottom coefficient; q represents a preset power, and Q is belonged to (0.2, 1).
In the scheme provided by the embodiment of the application, the brightness value of the dark area in the image is adjusted through the piecewise function, the excessive brightness amplitude of the adjacent area is reduced, the display is soft and natural, and the influence on the watching experience of a user caused by the fact that the display image changes abruptly due to the large difference of the average brightness values of the adjacent areas is avoided.
Optionally, the compensating the average value of the brightness corresponding to each second sub-region based on the correlation factor corresponding to each second sub-region to obtain a compensated brightness value includes:
determining a compensation coefficient of each second subregion based on the correlation factor and a preset correction coefficient;
and compensating the average value of the brightness of each second sub-area based on the compensation coefficient corresponding to each second sub-area to obtain a compensated brightness value.
Optionally, the image data in the image is 8 bits, 12 bits or 16 bits.
Optionally, if the image data in the image is 8 bits, compensating the average value of the luminance of each second sub-region based on the compensation coefficient corresponding to each second sub-region includes:
compensating for the average value of the luminance of each of the second sub-regions by:
Y·＝Y·[(Y/255)(M·K)]
wherein, Y·Representing the compensated brightness value of any second sub-area; y represents the average value of the brightness corresponding to any one second subregion; m represents a preset correction coefficient; k represents a correlation factor; m · K represents a compensation coefficient.
Optionally, calculating an average value of the luminance corresponding to each first sub-region includes:
converting the image into RGB data, and converting hue, saturation and brightness components according to the RGB data;
and extracting the brightness components, and obtaining the average value of the brightness corresponding to each first sub-area based on the brightness components.
In a second aspect, an embodiment of the present application provides an apparatus for displaying an image, the apparatus including:
the device comprises a partitioning unit, a calculating unit and a processing unit, wherein the partitioning unit is used for receiving an input image, dividing the image into a plurality of first sub-regions and respectively calculating the average value of the brightness corresponding to each first sub-region;
a first determination unit configured to determine at least one second sub-region, from among the plurality of first sub-regions, in which an average value of the luminance is smaller than a preset luminance threshold;
a second determining unit, configured to determine a correlation factor corresponding to each second sub-region based on a preset control starting depth, a preset brightness threshold, and an average value of brightness corresponding to each second sub-region in the at least one second sub-region, where the correlation factor represents a brightness value compensation amplitude of each second sub-region;
the compensation unit is used for compensating the average value of the brightness corresponding to each second sub-area based on the correlation factor corresponding to each second sub-area to obtain a compensated brightness value;
and the display unit is used for adjusting the backlight value corresponding to each second sub-area based on the compensated brightness value and displaying the image based on the adjusted backlight value.
Optionally, the correlation factor is represented by a piecewise function or by a Pulse Width Modulation (PWM) duty cycle.
Optionally, the correlation factor is represented by a piecewise function, including:
the correlation factor is represented by the following piecewise function:
wherein K represents a correlation factor; a represents a preset control starting depth; y represents the average of the luminance of any of the second sub-regions; y is1Representing a preset brightness threshold.
Optionally, the correlation factor is represented by a piecewise function, including:
the correlation factor is represented by the following piecewise function:
wherein K represents a correlation factor; a represents a preset control starting depth; y represents any of the secondAn average of the luminance of the sub-regions; y is1Representing a preset brightness threshold; p represents a preset power bottom coefficient; q represents a preset power, and Q is belonged to (0.2, 1).
Optionally, the compensation unit is specifically configured to:
determining a compensation coefficient of each second subregion based on the correlation factor and a preset correction coefficient;
and compensating the average value of the brightness of each second sub-area based on the compensation coefficient corresponding to each second sub-area to obtain a compensated brightness value.
Optionally, the image data in the image is 8 bits, 12 bits or 16 bits.
Optionally, if the image data in the image is 8 bits, the compensation unit is specifically configured to:
compensating for the average value of the luminance of each of the second sub-regions by:
Y·＝Y·[(Y/255)(M·K)]
wherein, Y·Representing the compensated brightness value of any second sub-area; y represents the average value of the brightness corresponding to any one second subregion; m represents a preset correction coefficient; k represents a correlation factor; m · K represents a compensation coefficient.
Optionally, the partition unit is specifically configured to:
converting the image into RGB data, and converting hue, saturation and brightness components according to the RGB data;
and extracting the brightness components, and obtaining the average value of the brightness corresponding to each first sub-area based on the brightness components.
In a third aspect, the present application provides an electronic device, comprising:
a memory for storing instructions for execution by at least one processor;
a processor for loading and executing instructions stored in the memory to implement the method of the first aspect.
In a fourth aspect, the present application provides a computer readable storage medium having stored thereon computer instructions which, when run on a computer, cause the computer to perform the method of the first aspect.
Drawings
Fig. 1a is a 4 × 4 LED backlight structure according to an embodiment of the present disclosure;
fig. 1b is a 4 × 2 direct-type LED backlight structure according to an embodiment of the present disclosure;
FIG. 2 is a flowchart of a method for displaying an image according to an embodiment of the present disclosure;
FIG. 3a is a frame of an input image according to an embodiment of the present application;
fig. 3b is an enlarged image of two subregions numbered 4 and 7 in the input image provided by the embodiment of the present application;
fig. 3c is a magnified image of two sub-areas numbered 4 and 7 displayed based on the adjusted backlight value according to the embodiment of the present application;
fig. 4 is a schematic structural diagram of an image display apparatus according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
In the solutions provided in the embodiments of the present application, the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In order to better understand the technical solutions, the technical solutions of the present application are described in detail below with reference to the drawings and specific embodiments, and it should be understood that the specific features in the embodiments and examples of the present application are detailed descriptions of the technical solutions of the present application, and are not limitations of the technical solutions of the present application, and the technical features in the embodiments and examples of the present application may be combined with each other without conflict.
To facilitate understanding of the process of image display described below, some concepts are first explained.
In the LCD display field, since the LCD cannot emit light, a plurality of LEDs are arranged in a row and disposed on the upper and lower sides of the LCD display screen to obtain an LED backlight structure, wherein the LED backlight structure has various structures, for example, a side-down type structure as shown in fig. 1a and a direct-down type structure as shown in fig. 1b, wherein fig. 1a shows a 4 × 4 side-down type LED backlight structure; fig. 1b shows a 4 × 2 direct-type LED backlight structure.
Area backlight technology: the method is combined with a side-down or direct-down LED backlight structure, the whole screen image is divided into 1-dimensional or 2-dimensional areas, each area corresponds to one LED module, the backlight brightness of the LED module corresponding to the area is dynamically adjusted according to the content of the display image in each area, and the image contrast and the color saturation are greatly improved.
Gamma curve: is the relationship between the brightness value of the input image signal and the display brightness value of the display screen.
Example one
The method for displaying an image provided by the embodiment of the present application is further described in detail below with reference to the drawings in the specification, and a specific implementation manner of the method may include the following steps (a flow of the method is shown in fig. 2):
step 201, receiving an input image, dividing the image into a plurality of first sub-regions, and calculating an average value of luminance corresponding to each first sub-region.
After receiving an input image, first, the image is divided according to the number of partitions of the LED backlight, that is, the image is divided into a plurality of first sub-areas, for example, the number of the partitions is generally 32 × 32, and the minimum number of the partitions also supports 300, and then, an average value of the luminance corresponding to each first sub-area is calculated, where there are a plurality of methods for calculating the average value of the luminance corresponding to each first sub-area, and a preferred method is described below as an example.
Calculating the average value of the brightness corresponding to each first sub-area, including:
converting the image into RGB data, and converting hue, saturation and brightness components according to the RGB data;
and extracting the brightness components, and obtaining the average value of the brightness corresponding to each first sub-area based on the brightness components.
Specifically, the received data of each pixel point in the input image is converted into RGB data, then hue, saturation and brightness components are converted according to the RGB data, the brightness component of each pixel point is extracted, and then an average value of the brightness corresponding to each first sub-region is determined based on the pixel point included in each first sub-region and the brightness value corresponding to each pixel point.
At step 202, at least one second sub-area, in which the average value of the brightness is smaller than a preset brightness threshold, is determined from the plurality of first sub-areas.
The method comprises the steps of storing a preset brightness threshold in a database in advance, for example, displaying 8 bits, wherein the gray-scale value of the brightness of each pixel is not more than 255, after the brightness value corresponding to each first sub-region is calculated, comparing the average value of the brightness corresponding to each first sub-region with the preset brightness threshold respectively, and determining at least one second region of which the average value of the brightness is less than the preset brightness threshold.
Step 203, determining a correlation factor corresponding to each second sub-region based on a preset control starting depth, a preset brightness threshold and an average value of brightness corresponding to each second sub-region in the at least one second sub-region, wherein the correlation factor represents a compensation amplitude of a brightness value of each second sub-region.
After the second sub-region is selected, determining a correlation factor corresponding to each second sub-region based on a preset start-control depth, a preset brightness threshold and an average value of brightness corresponding to each second sub-region in the at least one second sub-region, where the correlation factor may be represented by a piecewise function or may be represented by a Pulse Width Modulation (PWM) duty cycle, which is not limited herein.
If the correlation factor is represented by a piecewise function, the correlation factor corresponding to each second sub-region can be determined according to the following formula:
wherein K represents a correlation factor; a represents a preset control starting depth; y represents the average of the luminance of any of the second sub-regions; y is1Representing a preset brightness threshold.
If the correlation factor is represented by a piecewise function, the correlation factor corresponding to each second sub-region can be determined according to the following formula:
wherein K represents a correlation factor; a represents a preset control starting depth; y represents the average of the luminance of any of the second sub-regions; y is1Representing a preset brightness threshold; p represents a preset power bottom coefficient; q represents a preset power, and Q is belonged to (0.2, 1).
Further, the correlation factor may also be equal to the pulse width modulation PWM duty cycle.
And 204, compensating the average value of the brightness corresponding to each second sub-region based on the correlation factor corresponding to each second sub-region to obtain a compensated brightness value.
Specifically, after determining the correlation factor corresponding to each second sub-region, the average value of the luminance corresponding to each second sub-region is compensated based on the correlation factor corresponding to each second sub-region, wherein there are various ways of compensating the average value of the luminance corresponding to each second sub-region based on the correlation factor corresponding to each second sub-region, and a preferred way is described as an example below.
Compensating the average value of the brightness corresponding to each second sub-area based on the correlation factor corresponding to each second sub-area, including: determining a compensation coefficient of each second subregion based on the correlation factor and a preset correction coefficient; and compensating the average value of the brightness of each second sub-area based on the compensation coefficient corresponding to each second sub-area.
Specifically, the received input image data may be 8 bits, 12 bits, or 16 bits, and if the received image data is 8 bits, the average value of the luminance of each second sub-region is compensated based on the compensation coefficient corresponding to each second sub-region to obtain a compensated luminance value, where the compensating includes:
compensating the average value of the brightness of each second subregion according to:
Y·＝Y·[(Y/255)(M·K)]
wherein, Y·Representing the compensated brightness value of any second sub-area; y represents the average value of the brightness corresponding to any one second subregion; m represents a preset correction coefficient; k represents a correlation factor; m · K represents a compensation coefficient.
Step 205, adjusting the backlight value corresponding to each second sub-region based on the compensated brightness value, and displaying the image based on the adjusted backlight value.
After the average value of the brightness of each second sub-region is compensated according to the association factor corresponding to each second sub-region, the value of the display brightness corresponding to each second sub-region is determined based on the compensated brightness value corresponding to each second sub-region and a preset gamma function, the backlight value corresponding to each second sub-region is determined based on the value of the display brightness corresponding to each second sub-region, and the image is displayed based on the adjusted backlight value.
In order to facilitate understanding of the above-described image display process, the following description will be made by way of example.
For example, referring to fig. 3a, an image is input in one frame, the image is displayed with 8 bits, if there are 9 LED modules corresponding to a display area in a current display, the image shown in fig. 3a is divided into 9 sub-areas, numbers of which are 1 to 9 respectively, where each sub-area includes N pixel points, N is a positive integer greater than 1, and if a preset brightness threshold is 180, a preset start-control depth a is 0.4.
Firstly, after receiving the image shown in fig. 3a, converting the image data into RGB data, converting hue, saturation and brightness components according to the RGB data, then respectively extracting the brightness component of each pixel point in each sub-region, calculating an average value of the brightness corresponding to each sub-region based on the brightness component of the pixel point of each sub-region, if the average values of the brightness of each sub-region numbered 1 to 9 are 220, 215, 180, 120, 195, 200, 160, 185, 210, and then determining that the average values of the brightness of two sub-regions numbered 4 and 7 are smaller than a preset brightness threshold 180 from the 9 sub-regions numbered 1 to 9, referring to fig. 3b, which is an enlarged image of two sub-regions numbered 4 and 7.
Then, the correlation factors corresponding to the two sub-regions numbered 4 and 7 are calculated according to the following formula:
the calculated correlation factors corresponding to the two subregions numbered 4 and 77 are K0.8 and K0.93, respectively.
The calculated K value is then substituted into the following equation:
Y·＝Y·[(Y/255)(M·K)]
the compensated luminance values corresponding to the two sub-regions numbered 4 and 7 are calculated to be 65 and 104, respectively, the backlight values corresponding to the two sub-regions numbered 4 and 77 are adjusted based on the compensated luminance values, and an image is displayed based on the adjusted backlight values, as shown in fig. 3 c.
In the scheme provided by the embodiment of the application, a received image is divided into a plurality of first sub-regions, an average value of brightness of each first sub-region is respectively determined, a second sub-region with the average value of brightness smaller than a preset brightness threshold value is selected from the plurality of first sub-regions, a correlation factor corresponding to each second sub-region is determined based on a preset starting control depth, the preset brightness threshold value and the average value of brightness of each second sub-region, the average value of brightness of the region is compensated based on the correlation factor of each second sub-region to obtain a compensated brightness value, a backlight value of each second sub-region is adjusted based on the compensated brightness value, and the image is displayed based on the backlight value. Therefore, in the scheme provided by the embodiment of the application, the luminance value of the dark area in the image is compensated through the correlation factor, and the backlight value of the dark area is adjusted based on the compensated luminance value, so that the image display hierarchy is increased, and the image display effect is improved.
Example two
An embodiment of the present application provides an apparatus for displaying an image, and referring to fig. 4, the apparatus includes:
a partitioning unit 401, configured to receive an input image, partition the image into a plurality of first sub-regions, and respectively calculate an average value of luminance corresponding to each first sub-region;
a first determining unit 402, configured to determine at least one second sub-region, from the plurality of first sub-regions, where an average value of the luminance is smaller than a preset luminance threshold;
a second determining unit 403, configured to determine a correlation factor corresponding to each second sub-region based on a preset control starting depth, a preset brightness threshold, and an average value of brightness corresponding to each second sub-region in the at least one second sub-region, where the correlation factor represents a brightness value compensation amplitude of each second sub-region;
a compensation unit 404, configured to compensate the average value of the brightness corresponding to each second sub-region based on the correlation factor corresponding to each second sub-region, so as to obtain a compensated brightness value;
a display unit 405, configured to adjust a backlight value corresponding to each second sub-region based on the compensated brightness value, and display the image based on the adjusted backlight value.
Optionally, the correlation factor is represented by a piecewise function or by a Pulse Width Modulation (PWM) duty cycle.
Optionally, the correlation factor is represented by a piecewise function, including:
the correlation factor is represented by the following piecewise function:
wherein K represents a correlation factor; a represents a preset control starting depth; y represents the average of the luminance of any of the second sub-regions; y is1Representing a preset brightness threshold.
Optionally, the correlation factor is represented by a piecewise function, including:
the correlation factor is represented by the following piecewise function:
wherein K represents a correlation factor; a represents a preset control starting depth; y represents the average of the luminance of any of the second sub-regions; y is1Representing a preset brightness threshold; p represents a preset power bottom coefficient; q represents a preset power, and Q is belonged to (0.2, 1).
Optionally, the compensation unit 404 is specifically configured to:
determining a compensation coefficient of each second subregion based on the correlation factor and a preset correction coefficient;
and compensating the average value of the brightness of each second sub-area based on the compensation coefficient corresponding to each second sub-area to obtain a compensated brightness value.
Optionally, the image data in the image is 8 bits, 12 bits or 16 bits.
Optionally, if the image data in the image is 8 bits, the compensation unit 404 is specifically configured to:
compensating for the average value of the luminance of each of the second sub-regions by:
Y·＝Y·[(Y/255)(M·K)]
wherein, Y·Representing the compensated brightness value of any second sub-area; y represents the average value of the brightness corresponding to any one second subregion; m represents a preset correction coefficient; k represents a correlation factor.
Optionally, the partition unit 401 is specifically configured to:
converting the image into RGB data, and converting hue, saturation and brightness components according to the RGB data;
and extracting the brightness components, and obtaining the average value of the brightness corresponding to each first sub-area based on the brightness components.
EXAMPLE III
The present application provides an electronic device, see fig. 5, comprising:
a memory 501 for storing instructions for execution by at least one processor;
the processor 502 is configured to load and execute instructions stored in the memory to implement the method according to the first embodiment.
Example four
The present application provides a computer-readable storage medium having stored thereon computer instructions which, when executed on a computer, cause the computer to perform the method of embodiment one.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (9)
1. A method of image display, comprising:
receiving an input image, dividing the image into a plurality of first sub-regions, and respectively calculating the average value of the brightness corresponding to each first sub-region;
determining at least one second sub-area, of the plurality of first sub-areas, in which the average value of the brightness is smaller than a preset brightness threshold;
determining a correlation factor corresponding to each second sub-region based on a preset starting and controlling depth, a preset brightness threshold and an average value of brightness corresponding to each second sub-region in the at least one second sub-region, wherein the correlation factor represents a compensation amplitude of a brightness value of each second sub-region;
determining a compensation coefficient of each second sub-area based on the corresponding correlation factor of each second sub-area and a preset correction coefficient;
compensating the average value of the brightness of each second sub-area based on the compensation coefficient corresponding to each second sub-area to obtain a compensated brightness value;
and adjusting the backlight value corresponding to each second sub-area based on the compensated brightness value, and displaying the image based on the adjusted backlight value.
2. The method of claim 1, wherein the correlation factor is represented by a piecewise function or by a Pulse Width Modulation (PWM) duty cycle.
3. The method of claim 2, wherein the correlation factor is represented by a piecewise function comprising:
the correlation factor is represented by the following piecewise function:
wherein K represents a correlation factor; a represents a preset control starting depth; y represents the average of the luminance of any of the second sub-regions; y is1Representing a preset brightness threshold.
4. The method of claim 2, wherein the correlation factor is represented by a piecewise function comprising:
the correlation factor is represented by the following piecewise function:
wherein K represents a correlation factor; a represents a preset control starting depth; y represents the average of the luminance of any of the second sub-regions; y is1Representing a preset brightness threshold; p represents a preset power bottom coefficient; q represents a preset power, and Q is belonged to (0.2, 1).
5. The method of claim 1, wherein the image data in the image is 8 bits, 12 bits, or 16 bits.
6. The method of claim 5, wherein if the image data in the image is 8 bits, compensating the average value of the luminance of each second sub-region based on the compensation coefficient corresponding to each second sub-region comprises:
compensating for the average value of the luminance of each of the second sub-regions by:
Y·＝Y·[(Y/255)(M·K)]
wherein, Y·Representing the compensated brightness value of any second sub-area; y represents the average value of the brightness corresponding to any one second subregion; m represents a preset correction coefficient; k represents a correlation factor; m · K represents a compensation coefficient.
7. The method of any of claims 1-6, wherein calculating an average of the luminance for each first sub-region comprises:
converting the image into RGB data, and converting hue, saturation and brightness components according to the RGB data;
and extracting the brightness components, and obtaining the average value of the brightness corresponding to each first sub-area based on the brightness components.
8. An apparatus for displaying an image, comprising:
the device comprises a partitioning unit, a calculating unit and a processing unit, wherein the partitioning unit is used for receiving an input image, dividing the image into a plurality of first sub-regions and respectively calculating the average value of the brightness corresponding to each first sub-region;
a first determination unit configured to determine at least one second sub-region, from among the plurality of first sub-regions, in which an average value of the luminance is smaller than a preset luminance threshold;
a second determining unit, configured to determine a correlation factor corresponding to each second sub-region based on a preset control starting depth, a preset brightness threshold, and an average value of brightness corresponding to each second sub-region in the at least one second sub-region, where the correlation factor represents a compensation amplitude of a brightness value of each second sub-region;
the compensation unit is used for determining a compensation coefficient of each second sub-area based on the corresponding correlation factor of each second sub-area and a preset correction coefficient; compensating the average value of the brightness of each second sub-area based on the compensation coefficient corresponding to each second sub-area to obtain a compensated brightness value;
and the display unit is used for adjusting the backlight value corresponding to each second sub-area based on the compensated brightness value and displaying the image based on the adjusted backlight value.
9. An electronic device, comprising:
a memory for storing instructions for execution by at least one processor;
a processor for loading and executing instructions stored in a memory to implement the method of any one of claims 1-7.
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| CN111429840B (en) * | 2020-03-16 | 2022-05-17 | 上海顺久电子科技有限公司 | Display device and brightness adjusting method thereof |
| CN112911162B (en) * | 2021-01-19 | 2022-05-31 | 佛山市顺德区美的洗涤电器制造有限公司 | Light supplementing method and device for dish washing machine and dish washing machine |
| CN113703702A (en) * | 2021-08-17 | 2021-11-26 | 北京蜂巢世纪科技有限公司 | Image display method and device |
| CN117693785A (en) * | 2022-04-28 | 2024-03-12 | 京东方科技集团股份有限公司 | Display panel brightness compensation method and device, display equipment and storage medium |
| CN115050326B (en) * | 2022-08-15 | 2022-11-04 | 禹创半导体(深圳)有限公司 | Adaptive visible dimming method for OLED (organic light emitting diode) under strong light |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107424572A (en) * | 2017-06-12 | 2017-12-01 | 青岛海信电器股份有限公司 | A kind of display drive method, device and display |
| CN107909970A (en) * | 2017-12-29 | 2018-04-13 | 晨星半导体股份有限公司 | Display device and its corresponding local dimming driving method |
| CN108831409A (en) * | 2018-04-23 | 2018-11-16 | 遵义师范学院 | A kind of image display driving method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5893673B2 (en) * | 2013-06-28 | 2016-03-23 | キヤノン株式会社 | Image display apparatus and control method thereof |
| WO2016183234A1 (en) * | 2015-05-12 | 2016-11-17 | Dolby Laboratories Licensing Corporation | Backlight control and display mapping for high dynamic range images |
| CN107689214B (en) * | 2016-08-05 | 2020-03-24 | 青岛海信电器股份有限公司 | Backlight adjusting method and device of intelligent display equipment |
| CN108877694B (en) * | 2018-08-06 | 2021-08-31 | 深圳创维－Rgb电子有限公司 | Double-layer liquid crystal screen, backlight brightness control method and device and electronic equipment |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107424572A (en) * | 2017-06-12 | 2017-12-01 | 青岛海信电器股份有限公司 | A kind of display drive method, device and display |
| CN107909970A (en) * | 2017-12-29 | 2018-04-13 | 晨星半导体股份有限公司 | Display device and its corresponding local dimming driving method |
| CN108831409A (en) * | 2018-04-23 | 2018-11-16 | 遵义师范学院 | A kind of image display driving method |
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