CN109102779B - Backlight adjustment method and device - Google Patents

Abstract

The present disclosure relates to backlight adjustment methods and apparatuses. The method includes: acquiring brightness information of a picture to be displayed; counting the number of pixels of the picture to be displayed in each preset brightness region according to the brightness information; according to the number of pixels of the picture to be displayed in each preset brightness region and the pre-stored brightness coefficients corresponding to each preset brightness area, to determine the average brightness coefficient of the to-be-displayed picture; The backlight value corresponding to the picture, and the backlight value curve includes a corresponding curve between the average value of the brightness coefficient and the backlight value. The technical solution can set different backlight values for pictures with different brightness distributions under the same APL, and the backlight control of the pictures is more flexible and accurate.

Description

Backlight adjustment method and device

technical field

The present disclosure relates to the field of display technology, and in particular, to a backlight adjustment method and device.

Background technique

The display screens of display devices such as televisions and computers are mostly transmissive LCD screens. The brightness of transmissive LCD screens is determined by the light transmittance of the backlight system and the liquid crystal panel, but due to the light transmittance of the liquid crystal panel. Lower, generally 6%-8%, and relatively stable, so the brightness adjustment of the transmissive LCD screen is mainly controlled and adjusted by the backlight system.

In the actual use process of the user, the brighter the backlight of the display screen, the brighter and brighter the display effect of the screen will be. However, if the backlight is always in the brightest state, it is easy to cause eye fatigue after a long viewing time, and the power consumption has been kept at a relatively high level. The high state is not environmentally friendly enough, so it is necessary to dynamically adjust the brightness of the backlight according to the display screen.

SUMMARY OF THE INVENTION

Embodiments of the present disclosure provide a backlight adjustment method and apparatus. The technical solution is as follows:

According to a first aspect of the embodiments of the present disclosure, there is provided a backlight adjustment method, including:

Obtain the brightness information of the screen to be displayed;

According to the brightness information, count the number of pixels of the picture to be displayed in each preset brightness area;

Determine the average brightness coefficient of the to-be-displayed image according to the number of pixels of the to-be-displayed image in each preset brightness area and the pre-stored brightness coefficients corresponding to each preset brightness area;

The backlight value corresponding to the to-be-displayed image is determined according to the average brightness coefficient of the to-be-displayed image and a preset backlight value curve, where the backlight value curve includes a corresponding curve between the average brightness coefficient and the backlight value.

In one embodiment, determining the average brightness coefficient of the to-be-displayed picture according to the number of pixels of the to-be-displayed picture in each preset brightness region and the pre-stored brightness coefficients corresponding to each preset brightness region, including :

Calculate the average luminance coefficient L _cal of the picture to be displayed according to the following formula:

Wherein, N is the number of preset brightness regions, m×n is the number of pixels in the picture to be displayed; k _i is the brightness coefficient corresponding to the ith preset brightness region, 0≤k _i ≤255, n _i is the number of pixels of the picture to be displayed in the i-th preset brightness area.

In one embodiment, determining the backlight value corresponding to the to-be-displayed image according to the average brightness coefficient of the to-be-displayed image and a preset backlight value curve includes:

Calculate the backlight value BL _cal corresponding to the picture to be displayed according to the following formula:

BL _cal =BL _j +(BL _j+1 -BL _j )·(L _cal -j)

Wherein, j=[L _cal ], BL _j is the preset backlight value corresponding to j, 0≤BL _j ≤255.

In one embodiment, determining the backlight value corresponding to the to-be-displayed image according to the average brightness coefficient of the to-be-displayed image and a preset backlight value curve includes:

determining the preprocessed backlight value corresponding to the to-be-displayed image according to the average brightness coefficient of the to-be-displayed image and a preset backlight value curve;

Get the backlight adjustment ratio;

The backlight value corresponding to the to-be-displayed image is determined according to the pre-processed backlight value corresponding to the to-be-displayed image and the backlight adjustment ratio.

In one embodiment, the method further includes:

When displaying the to-be-displayed picture, the backlight value of the previous frame of the displayed picture is gradually adjusted to the backlight value corresponding to the to-be-displayed picture according to a preset step size.

According to a second aspect of the embodiments of the present disclosure, there is provided a backlight adjustment device, comprising:

a first acquiring module, configured to acquire the brightness information of the picture to be displayed;

a statistics module, configured to count the number of pixels of the to-be-displayed picture in each preset brightness area according to the brightness information;

a first determining module, configured to determine the average value of the brightness coefficients of the to-be-displayed picture according to the number of pixels of the to-be-displayed picture in each preset brightness region and the pre-stored brightness coefficients corresponding to each preset brightness region;

The second determination module is configured to determine the backlight value corresponding to the to-be-displayed image according to the average brightness coefficient of the to-be-displayed image and a preset backlight value curve, where the backlight value curve includes the average brightness coefficient and the backlight value the corresponding curve between.

In one embodiment, the first determining module includes:

The first calculation sub-module is configured to calculate the average value L _cal of the luminance coefficients of the picture to be displayed according to the following formula:

Wherein, N is the number of preset brightness regions, m×n is the number of pixels in the picture to be displayed; k _i is the brightness coefficient corresponding to the ith preset brightness region, 0≤k _i ≤255, n _i is the number of pixels of the picture to be displayed in the i-th preset brightness area.

In one embodiment, the second determining module includes:

The second calculation submodule is used to calculate the backlight value BL _cal corresponding to the to-be-displayed picture according to the following formula:

BL _cal =BL _j +(BL _j+1 -BL _j )·(L _cal -j)

Wherein, j=[L _cal ], BL _j is the preset backlight value corresponding to j, 0≤BL _j ≤255.

In one embodiment, the second determining module includes:

a first determination sub-module, configured to determine the preprocessed backlight value corresponding to the to-be-displayed image according to the average brightness coefficient of the to-be-displayed image and a preset backlight value curve;

Get the sub-module to get the backlight adjustment ratio;

The second determination sub-module is configured to determine the backlight value corresponding to the to-be-displayed image according to the pre-processed backlight value corresponding to the to-be-displayed image and the backlight adjustment ratio.

In one embodiment, the apparatus further includes:

The adjustment module is configured to gradually adjust the backlight value of the previous frame of the displayed image to the backlight value corresponding to the to-be-displayed image according to a preset step size when the to-be-displayed image is displayed.

According to a third aspect of the embodiments of the present disclosure, there is provided a backlight adjustment device, comprising:

processor;

memory for storing processor-executable instructions;

wherein the processor is configured to:

Obtain the brightness information of the screen to be displayed;

According to the brightness information, count the number of pixels of the picture to be displayed in each preset brightness area;

Determine the average brightness coefficient of the to-be-displayed image according to the number of pixels of the to-be-displayed image in each preset brightness area and the pre-stored brightness coefficients corresponding to each preset brightness area;

The backlight value corresponding to the to-be-displayed image is determined according to the average brightness coefficient of the to-be-displayed image and a preset backlight value curve, where the backlight value curve includes a corresponding curve between the average brightness coefficient and the backlight value.

According to a fourth aspect of the embodiments of the present disclosure, there is provided a computer-readable storage medium storing computer instructions, the computer instructions implementing the steps in the above method when executed by a processor.

The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects: In this embodiment, the brightness information of the to-be-displayed picture can be obtained; according to the brightness information, the number of pixels of the to-be-displayed picture in each preset brightness area is counted; According to the number of pixels of the picture to be displayed in each preset brightness area and the pre-stored brightness coefficient corresponding to each preset brightness area, the average value of the brightness coefficient of the to-be-displayed picture is determined; according to the brightness coefficient of the to-be-displayed picture The average value and the preset backlight value curve are used to determine the backlight value corresponding to the to-be-displayed picture, and the backlight value curve includes a corresponding curve between the average value of the brightness coefficient and the backlight value. In this way, a preset brightness coefficient is correspondingly set for each preset brightness area, so that different average brightness coefficients can be obtained under the same APL (Average Picture Level, average picture brightness) pictures with different brightness distributions, and then different brightness coefficients can be obtained. Different backlight values corresponding to the average value of the brightness coefficient, so that different backlight values can be set for pictures with different brightness distributions under the same APL, and the backlight control of the pictures is more flexible and accurate.

It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description serve to explain the principles of the disclosure.

FIG. 1 is a flowchart illustrating a backlight adjustment method according to an exemplary embodiment.

Fig. 2 is a histogram of luminance coefficients according to an exemplary embodiment.

FIG. 3 is a schematic diagram of a backlight value curve according to an exemplary embodiment.

Fig. 4 is a flowchart of a backlight adjustment method according to an exemplary embodiment.

Fig. 5 is a block diagram of a backlight adjusting device according to an exemplary embodiment.

Fig. 6 is a block diagram of a backlight adjusting device according to an exemplary embodiment.

Fig. 7 is a block diagram of a backlight adjusting device according to an exemplary embodiment.

Fig. 8 is a block diagram of a backlight adjusting device according to an exemplary embodiment.

Fig. 9 is a block diagram of a backlight adjusting device according to an exemplary embodiment.

Fig. 10 is a block diagram of a backlight adjusting device according to an exemplary embodiment.

Detailed ways

Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. Where the following description refers to the drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the illustrative examples below are not intended to represent all implementations consistent with this disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as recited in the appended claims.

At present, the adjustment of the backlight brightness is mostly based on the average brightness APL (Average PictureLevel) of the display screen. For example, as the APL changes from 0% to 100%, the backlight changes linearly from 1 to 100, that is, the APL is 0%. , the backlight value is 1, when the APL is 50%, the backlight value is 50, and when the APL is 100%, the backlight value is 100. This will cause a large number of pictures with different brightness distributions to have the same APL and use the same brightness backlight, which will inevitably result in poor display effects on some pictures.

In this embodiment, in order to solve the above problem, this embodiment can obtain the brightness information of the picture to be displayed; according to the brightness information, count the number of pixels of the picture to be displayed in each preset brightness area; The number of pixels in each preset brightness area and the preset brightness coefficient corresponding to each preset brightness area, determine the average value of the brightness coefficient of the picture to be displayed; according to the average value of the brightness coefficient of the picture to be displayed and the preset backlight A value curve is used to determine the backlight value corresponding to the to-be-displayed picture, and the backlight value curve includes a corresponding curve between the average value of the brightness coefficient and the backlight value. In this way, a preset brightness coefficient is correspondingly set for each preset brightness area, so that different average brightness coefficients can be obtained under the same APL (AveragePicture Level, average picture brightness) pictures with different brightness distributions, and then different brightness can be obtained. Different backlight values corresponding to the average value of the coefficients, so that different backlight values can be set for pictures with different brightness distributions under the same APL, and the backlight control of the pictures is more flexible and accurate.

FIG. 1 is a flowchart of a backlight adjustment method according to an exemplary embodiment. As shown in FIG. 1 , the backlight adjustment method used in a terminal includes the following steps 101-104:

In step 101, the brightness information of the picture to be displayed is obtained.

In step 102, according to the brightness information, count the number of pixels of the picture to be displayed in each preset brightness area.

In step 103, the average value of the brightness coefficients of the to-be-displayed image is determined according to the number of pixels of the to-be-displayed image in each preset brightness area and the pre-stored brightness coefficients corresponding to each preset brightness area.

In step 104, a backlight value corresponding to the to-be-displayed image is determined according to the average brightness coefficient of the to-be-displayed image and a preset backlight value curve, where the backlight value curve includes a difference between the average brightness coefficient and the backlight value. the corresponding curve.

Here, when a terminal such as a TV is playing a video, a picture, or displaying a picture on a UI (User Interface, user interface), the terminal can first obtain the picture information of the picture to be displayed, and then perform some display processing. The picture information of the picture to be displayed is displayed on the screen of the terminal, and the display processing includes determining the backlight value corresponding to the picture to be displayed. In this way, the terminal can use the backlight value corresponding to the picture to be displayed when displaying the picture to be displayed.

Here, the picture information of the picture to be displayed obtained by the terminal includes the brightness information of the picture to be displayed, the brightness information includes the brightness value of each pixel in the picture to be displayed, and the value range of the pixel brightness value is 0 to 255. Black is 0 and all white is 255.

Here, the terminal may divide N brightness areas as preset brightness areas in advance according to the brightness value range of 0-255. For example, it may be divided into N brightness areas. Then, the terminal may obtain statistics at each preset brightness of the to-be-displayed picture. The number of pixels in the area.

Here, the terminal can set a brightness coefficient for each preset brightness area in advance and store it in advance. For example, when the brightness value of the preset brightness area is an intermediate range value, the corresponding brightness coefficient is set to 0. Compared with the intermediate range value, the corresponding brightness coefficient is set to 0. The brightness coefficient of the preset brightness region with a larger brightness value is larger, and the brightness coefficient of the preset brightness region with a smaller brightness value is also larger. By way of example, FIG. 2 is a histogram of luminance coefficients according to an exemplary embodiment. The horizontal axis is the luminance value, and the vertical axis is the luminance coefficient. As shown in FIG. Divided into 64 preset brightness areas, the brightness coefficients corresponding to these 64 preset areas can be (5, 3, 1, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 10, 10) .

Here, the terminal may multiply the number of pixels in each preset brightness area by the brightness coefficient corresponding to each preset brightness area, and then take an average value to obtain the average value of the brightness coefficient of the picture to be displayed, and then, according to the preset backlight value The corresponding relationship between the average value of the luminance coefficient and the backlight value in the curve is used to obtain the backlight value corresponding to the to-be-displayed picture. The backlight value curve can be a backlight value curve that is obtained by developers after setting the preset brightness coefficients corresponding to each preset area, through a large number of experiments and continuous adjustment, which is suitable for the display effect required by most users, and different display effects can be obtained. The backlight value curve is different.

Here, after determining the backlight value corresponding to the picture to be displayed, the terminal may adjust the backlight value of the terminal to the backlight value corresponding to the picture to be displayed when displaying the picture to be displayed.

In this embodiment, the brightness information of the picture to be displayed can be obtained; according to the brightness information, the number of pixels of the picture to be displayed in each preset brightness area is counted; according to the number of pixels of the picture to be displayed in each preset brightness area and the preset brightness coefficient corresponding to each preset brightness area, to determine the average value of the brightness coefficient of the to-be-displayed picture; The backlight value corresponding to the picture, and the backlight value curve includes a corresponding curve between the average value of the brightness coefficient and the backlight value. In this way, a preset brightness coefficient is correspondingly set for each preset brightness area, so that different brightness coefficient average values can be obtained under the same APL screen with different brightness distributions, and then different backlight values corresponding to different brightness coefficient average values can be obtained. , so that different backlight values can be set for pictures with different brightness distributions under the same APL, and the backlight control of the pictures is more flexible and accurate.

In a possible implementation manner, step 103 in the above backlight adjustment method may be implemented as the following step A1.

In step A1, the average luminance coefficient L _cal of the picture to be displayed is calculated according to the following formula:

Wherein, N is the number of preset brightness regions, m×n is the number of pixels in the picture to be displayed; k _i is the brightness coefficient corresponding to the ith preset brightness region, 0≤k _i ≤255, n _i is the number of pixels of the picture to be displayed in the i-th preset brightness area.

Here, still according to the example shown in FIG. 2 , N is 64, and the luminance coefficient k _i corresponding to the 64 preset areas is shown in FIG. Picture 1 is a 1920×1080 black background and white window, and the white window accounts for 20%. Picture 2 is a grayscale image with a luminance value of 51 of 1920×1080.

According to the above formula, the average luminance coefficient L _cal1 of the picture 1 can be calculated:

According to the above formula, the average luminance coefficient L _cal2 of the picture 2 can be calculated:

It can be seen from the above example that the average values of the luminance coefficients obtained from the pictures 1 and 2 with the same APL of 20% are also different due to the different luminance distributions.

In this embodiment, the average value of the brightness coefficient can be calculated according to the corresponding formula, so that different average values of the brightness coefficient can be obtained under the same APL screen with different brightness distributions, and then different backlight values corresponding to the different average values of the brightness coefficient can be obtained. In the same APL, the pictures with different brightness distributions can be set with different backlight values, which makes the backlight control of the pictures more flexible and accurate.

In a possible implementation manner, step 104 in the above backlight adjustment method may be implemented as the following step B1.

In step B1, the backlight value BL _cal corresponding to the picture to be displayed is calculated according to the following formula:

BL _cal =BL _j +(BL _j+1 -BL _j )·(L _cal -j) Equation 2

Wherein, j=[L _cal ], BL _j is the preset backlight value corresponding to j, 0≤BL _j ≤255.

Here, the developer can determine the average value of the brightness coefficients corresponding to a large number of sample pictures according to the preset brightness coefficients corresponding to each preset brightness area. The value range of the average value of the brightness coefficients is 0 to k, where k is the maximum value of k _i The value range of k is 0 to 255. The value range can be divided into k+1 points, each point corresponds to a backlight value, and the backlight value corresponding to the sample screen is determined according to formula 2. The backlight value is used to continuously adjust each point corresponding to a backlight value until the display effect of these sample images meets the requirements of the developer, and the final backlight value BL _j corresponding to each point can be determined. After that, the terminal can follow the formula 2. Calculate the backlight value BL _cal corresponding to the picture to be displayed.

Here, FIG. 3 is a schematic diagram of a backlight value curve according to an exemplary embodiment, the horizontal axis is the brightness coefficient, and the vertical axis is the backlight value; still taking the example shown in FIG. The preset brightness coefficient corresponding to the preset brightness area determines the average value of the brightness coefficient corresponding to a large number of sample pictures, the value range of the brightness coefficient average value L _cal is 0 to 10, and the value range can be divided into 0, 1, ......, 9, 10, these 11 points, each point corresponds to a backlight value BL _j *, according to formula 2 to determine the backlight value corresponding to the sample screen, according to the final determined backlight value to continuously adjust each point corresponds to a backlight value , until the display effect of these sample images meets the requirements of the developer, the final backlight value BL _j corresponding to each point can be determined as (30, 42, 58, 76, 100, 132, 178, 200, 208, 216 , 220), the terminal can obtain the backlight value curve shown in FIG. 3 according to formula 2. Still taking picture 1 and picture 2 as examples for description, according to formula 2 and the backlight value curve shown in Figure 3, the backlight value corresponding to picture 1 is BL _cal1 =178+(200-178)×(6-[6 ])=178; the backlight value corresponding to screen 2 is BL _cal2 =42+(58-42)×(1-[1])=42.

As can be seen from the above example, for the above two different pictures of the same APL, namely picture 1 and picture 2, the proportion of high brightness contained in picture 1 is much larger than that of picture 2, and the ratio of the backlight value of picture 1 calculated according to the above formula 1 and formula 2. The backlight value of picture 2 is much larger, so that a stronger contrast ratio is obtained, and the user's viewing experience is better.

In this embodiment, the backlight value corresponding to the picture to be displayed can be determined according to formula 2, and the determination method is quick and convenient.

In a possible implementation manner, step 104 in the above backlight adjustment method may be implemented as the following steps C1 to C3.

In step C1, a pre-processed backlight value corresponding to the to-be-displayed image is determined according to the average brightness coefficient of the to-be-displayed image and a preset backlight value curve.

In step C2, the backlight adjustment ratio is obtained.

In step C3, the backlight value corresponding to the to-be-displayed image is determined according to the pre-processed backlight value corresponding to the to-be-displayed image and a preset backlight adjustment ratio.

Here, different users have different backlight brightness requirements. The terminal can set an input box for backlight adjustment ratio on the user interface. For example, the input box can display the maximum backlight that can be set by the OSD (On Screen Display). The mapping value BL _uim is 100, the user inputs the currently set OSD backlight mapping value BL _ui such as 90 in the input box, and the backlight adjustment ratio is p%=BL _ui /BL _uim .

Here, the terminal can calculate the final backlight value BL _f corresponding to the picture to be displayed according to the following formula:

BL _f = [BL _cal ×p%] Equation 3

The BL _cal is a backlight value corresponding to the to-be-displayed picture, and the p% is a preset backlight adjustment ratio. In practical applications, the backlight value BL _f needs to be an integer, so the value of BL _cal ×p% can be rounded.

Here, after determining the preprocessing backlight value of each image to be displayed, the terminal determines the final backlight value corresponding to the image to be displayed according to the backlight adjustment ratio input by the user, so that the brightness of the backlight used by the terminal to display the image meets the user's requirements.

画面2对应的背光值为

Still taking the above example as an example, it can be calculated that the preprocessing backlight value corresponding to picture 1 is BL _cal1 =178+(200-178)×(6-[6])=178; the preprocessing backlight value corresponding to picture 2 is BL _cal2 =42+(58−42)×(1−[1])=42. Assuming BL _uim = 100 and BL _ui = 90, the backlight value corresponding to picture 1

The backlight value corresponding to screen 2 is

In this embodiment, the backlight adjustment ratio can be obtained, so that after determining the preprocessed backlight value corresponding to the to-be-displayed image according to the average brightness coefficient of the to-be-displayed image and the preset backlight value curve, the The preprocessing backlight value corresponding to the displayed image and the backlight adjustment ratio determine the backlight value corresponding to the to-be-displayed image, so that the backlight can be adjusted according to the needs of different users by setting different backlight adjustment ratios to meet the different needs of different users.

In a possible implementation manner, the above-mentioned backlight adjustment method may further include the following step D1.

In step D1, when the to-be-displayed picture is displayed, the backlight value of the previous frame of the displayed picture is gradually adjusted to the backlight value corresponding to the to-be-displayed picture according to a preset step size.

Here, when the terminal displays a certain frame of the picture to be displayed, it needs to adjust the backlight value of the terminal from the backlight value corresponding to the previous frame of the displayed picture to the backlight value corresponding to the to-be-displayed picture. For example, when the difference between 200 and the backlight value of the picture to be displayed in this frame, such as 50, is large, the terminal directly adjusts the backlight value from 200 to 50, and the picture will flicker due to the jump of the backlight; The light and dark changes of the picture are more smooth and smooth. You can make a gradient between the backlight value of the previous frame, such as 200, and the backlight value of the picture to be displayed in this frame, such as 50, and gradually change with preset steps such as 3 or 5. . For example, assuming that the preset step size is 5, when the terminal needs to adjust the backlight value from 200 to 50, it can adjust the backlight value from 200-195-190...60-55-50, and so gradually adjust from 200 to 50, let The light and dark changes of the picture are smooth and smooth, and the user's viewing effect is better.

In this embodiment, when the to-be-displayed image is displayed, the backlight value of the previous frame of the displayed image can be gradually adjusted to the backlight value corresponding to the to-be-displayed image according to a preset step, so that the brightness and darkness of the terminal display image can be changed more easily. Smooth and smooth, user viewing effect is better.

The implementation process is described in detail below through several embodiments.

FIG. 4 is a flowchart of a backlight adjustment method according to an exemplary embodiment. As shown in FIG. 4 , the backlight adjustment method can be implemented by a terminal device such as a TV, and includes steps 401 - 407 .

In step 401, the brightness information of the picture to be displayed is acquired.

In step 402, according to the brightness information, count the number of pixels of the picture to be displayed in each preset brightness area.

In step 403, the average value of the luminance coefficient of the picture to be displayed is calculated according to formula 1:

Wherein, N is the number of preset brightness regions, m×n is the number of pixels in the picture to be displayed; k _i is the brightness coefficient corresponding to the ith preset brightness region, 0≤k _i ≤255, n _i is the number of pixels of the picture to be displayed in the i-th preset brightness area.

In step 404, a pre-processed backlight value corresponding to the to-be-displayed image is determined according to the average brightness coefficient of the to-be-displayed image and a preset backlight value curve.

In step 405, the backlight adjustment ratio is obtained.

In step 406, the backlight value corresponding to the to-be-displayed image is determined according to the pre-processed backlight value corresponding to the to-be-displayed image and the backlight adjustment ratio.

In step 407, when the to-be-displayed picture is displayed, the backlight value of the previous frame of the displayed picture is gradually adjusted to the backlight value corresponding to the to-be-displayed picture according to a preset step size.

The following are the apparatus embodiments of the present disclosure, which can be used to execute the method embodiments of the present disclosure.

Fig. 5 is a block diagram of a backlight adjustment apparatus according to an exemplary embodiment, and the apparatus can be implemented as part or all of an electronic device through software, hardware, or a combination of the two. As shown in Figure 5, the backlight adjustment device includes:

The first obtaining module 501 is used to obtain the brightness information of the picture to be displayed;

A statistics module 502, configured to count the number of pixels of the picture to be displayed in each preset brightness area according to the brightness information;

The first determination module 503 is configured to determine the average value of the brightness coefficient of the to-be-displayed image according to the number of pixels of the to-be-displayed image in each preset brightness area and the pre-stored brightness coefficient corresponding to each preset brightness area;

The second determination module 504 is configured to determine the backlight value corresponding to the to-be-displayed image according to the average brightness coefficient of the to-be-displayed image and a preset backlight value curve, where the backlight value curve includes the average brightness coefficient and the backlight value. Corresponding curve between values.

As a possible embodiment, FIG. 6 is a block diagram of a backlight adjustment apparatus according to an exemplary embodiment. As shown in FIG. 6 , the backlight adjustment apparatus disclosed above may further configure the first determination module 503 to include The first calculation sub-module 5031, wherein:

The first calculation sub-module 5031 is used to calculate the average luminance coefficient L _cal of the picture to be displayed according to the following formula:

Wherein, N is the number of preset brightness areas, m×n is the number of pixels in the picture to be displayed; k _i is the preset brightness coefficient corresponding to the ith preset brightness area, 0≤k _i ≤255 , n _i is the number of pixels of the picture to be displayed in the i-th preset brightness area.

As a possible embodiment, FIG. 7 is a block diagram of a backlight adjustment apparatus according to an exemplary embodiment. As shown in FIG. 7 , the backlight adjustment apparatus disclosed above may further configure the second determination module 504 to include The second calculation sub-module 5041, wherein:

The second calculation sub-module 5041 is configured to calculate the backlight value BL _cal corresponding to the to-be-displayed picture according to the following formula:

BL _cal =BL _j +(BL _j+1 -BL _j )·(L _cal -j)

Wherein, j=[L _cal ], BL _j is the preset backlight value corresponding to j, 0≤BL _j ≤255.

As a possible embodiment, FIG. 8 is a block diagram of a backlight adjustment apparatus according to an exemplary embodiment. As shown in FIG. 8 , the backlight adjustment apparatus disclosed above may further configure the second determination module 504 to include The first determination sub-module 5042, the acquisition sub-module 5043 and the second determination sub-module 5044, wherein:

The first determination sub-module 5042 is configured to determine the preprocessing backlight value corresponding to the to-be-displayed image according to the average brightness coefficient of the to-be-displayed image and a preset backlight value curve;

obtaining sub-module 5043 for obtaining the backlight adjustment ratio;

The second determination sub-module 5044 is configured to determine the backlight value corresponding to the to-be-displayed image according to the pre-processed backlight value corresponding to the to-be-displayed image and the backlight adjustment ratio.

As a possible embodiment, FIG. 9 is a block diagram of a backlight adjustment apparatus according to an exemplary embodiment. As shown in FIG. 9 , the backlight adjustment apparatus disclosed above may also be configured to include an adjustment module 505 , wherein :

The adjustment module 505 is configured to gradually adjust the backlight value of the previous frame of the displayed image to the backlight value corresponding to the to-be-displayed image according to a preset step size when the image to be displayed is displayed.

Regarding the apparatus in the above-mentioned embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be described in detail here.

FIG. 10 is a block diagram of an apparatus for adjusting backlight according to an exemplary embodiment, and the apparatus is suitable for terminal equipment. For example, apparatus 1000 may be a mobile phone, game console, computer, tablet device, personal digital assistant, or the like.

Apparatus 1000 may include one or more of the following components: processing component 1001 , memory 1002 , power supply component 1003 , multimedia component 1004 , audio component 1005 , input/output (I/O) interface 1006 , sensor component 1007 , and communication component 1008 .

The processing component 1001 generally controls the overall operation of the apparatus 1000, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 1001 may include one or more processors 1020 to execute instructions to perform all or part of the steps of the above-described methods. Additionally, processing component 1001 may include one or more modules that facilitate interaction between processing component 1001 and other components. For example, processing component 1001 may include a multimedia module to facilitate interaction between multimedia component 1004 and processing component 1001 .

Memory 1002 is configured to store various types of data to support operations at device 1000 . Examples of such data include instructions for any application or method operating on the device 1000, contact data, phonebook data, messages, pictures, videos, and the like. Memory 1002 may be implemented by any type of volatile or nonvolatile storage device or combination thereof, such as static random access memory (SRAM), electrically erasable programmable read only memory (EEPROM), erasable Programmable Read Only Memory (EPROM), Programmable Read Only Memory (PROM), Read Only Memory (ROM), Magnetic Memory, Flash Memory, Magnetic or Optical Disk.

Power supply assembly 1003 provides power to various components of device 1000 . Power supply components 1003 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to device 1000 .

Multimedia component 1004 includes a screen that provides an output interface between the device 1000 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from a user. The touch panel includes one or more touch sensors to sense touch, swipe, and gestures on the touch panel. The touch sensor may not only sense the boundaries of a touch or swipe action, but also detect the duration and pressure associated with the touch or swipe action. In some embodiments, the multimedia component 1004 includes a front-facing camera and/or a rear-facing camera. When the apparatus 1000 is in an operation mode, such as a shooting mode or a video mode, the front camera and/or the rear camera may receive external multimedia data. Each of the front and rear cameras can be a fixed optical lens system or have focal length and optical zoom capability.

Audio component 1005 is configured to output and/or input audio signals. For example, audio component 1005 includes a microphone (MIC) that is configured to receive external audio signals when device 1000 is in operating modes, such as call mode, recording mode, and voice recognition mode. The received audio signal may be further stored in memory 1002 or transmitted via communication component 1008 . In some embodiments, audio component 1005 also includes a speaker for outputting audio signals.

The I/O interface 1006 provides an interface between the processing component 1001 and a peripheral interface module, and the above-mentioned peripheral interface module may be a keyboard, a click wheel, a button, and the like. These buttons may include, but are not limited to: home button, volume buttons, start button, and lock button.

Sensor assembly 1007 includes one or more sensors for providing status assessment of various aspects of device 1000 . For example, the sensor assembly 1007 can detect the open/closed state of the device 1000, the relative positioning of the components, such as the display and keypad of the device 1000, the sensor assembly 1007 can also detect the position change of the device 1000 or a component of the device 1000 , the presence or absence of user contact with the device 1000 , the device 1000 orientation or acceleration/deceleration and the temperature change of the device 1000 . Sensor assembly 1007 may include a proximity sensor configured to detect the presence of nearby objects in the absence of any physical contact. Sensor assembly 1007 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 1007 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

Communication component 1008 is configured to facilitate wired or wireless communication between apparatus 1000 and other devices. The device 1000 may access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In one exemplary embodiment, the communication component 1008 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 1008 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

In an exemplary embodiment, apparatus 1000 may be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable A gate array (FPGA), controller, microcontroller, microprocessor or other electronic component implementation is used to perform the above method.

In an exemplary embodiment, there is also provided a non-transitory computer-readable storage medium including instructions, such as a memory 1002 including instructions, which are executable by the processor 1020 of the apparatus 1000 to perform the above method. For example, the non-transitory computer-readable storage medium may be ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, and the like.

A non-transitory computer-readable storage medium, when the instructions in the storage medium are executed by the processor of the apparatus 1000, the apparatus 1000 can execute the above-mentioned backlight adjustment method, and the method includes:

Obtain the brightness information of the screen to be displayed;

According to the brightness information, count the number of pixels of the picture to be displayed in each preset brightness area;

Determine the average brightness coefficient of the to-be-displayed image according to the number of pixels of the to-be-displayed image in each preset brightness area and the pre-stored brightness coefficients corresponding to each preset brightness area;

The backlight value corresponding to the to-be-displayed image is determined according to the average brightness coefficient of the to-be-displayed image and a preset backlight value curve, where the backlight value curve includes a corresponding curve between the average brightness coefficient and the backlight value.

In one embodiment, determining the average brightness coefficient of the to-be-displayed picture according to the number of pixels of the to-be-displayed picture in each preset brightness region and the pre-stored brightness coefficients corresponding to each preset brightness region, including :

Calculate the average luminance coefficient L _cal of the picture to be displayed according to the following formula:

Wherein, N is the number of preset brightness regions, m×n is the number of pixels in the picture to be displayed; k _i is the brightness coefficient corresponding to the ith preset brightness region, 0≤k _i ≤255, n _i is the number of pixels of the picture to be displayed in the i-th preset brightness area.

In one embodiment, determining the backlight value corresponding to the to-be-displayed image according to the average brightness coefficient of the to-be-displayed image and a preset backlight value curve includes:

Calculate the backlight value BL _cal corresponding to the picture to be displayed according to the following formula:

BL _cal =BL _j +(BL _j+1 -BL _j )·(L _cal -j)

Wherein, j=[L _cal ], BL _j is the preset backlight value corresponding to j, 0≤BL _j ≤255.

In one embodiment, determining the backlight value corresponding to the to-be-displayed image according to the average brightness coefficient of the to-be-displayed image and a preset backlight value curve includes:

determining the preprocessed backlight value corresponding to the to-be-displayed image according to the average brightness coefficient of the to-be-displayed image and a preset backlight value curve;

Get the backlight adjustment ratio;

The backlight value corresponding to the to-be-displayed image is determined according to the pre-processed backlight value corresponding to the to-be-displayed image and the backlight adjustment ratio.

In one embodiment, the method further includes:

When displaying the to-be-displayed picture, the backlight value of the previous frame of the displayed picture is gradually adjusted to the backlight value corresponding to the to-be-displayed picture according to a preset step size.

This embodiment also provides a backlight adjustment device, including:

processor;

memory for storing processor-executable instructions;

wherein the processor is configured to:

Obtain the brightness information of the screen to be displayed;

According to the brightness information, count the number of pixels of the picture to be displayed in each preset brightness area;

Determine the average brightness coefficient of the to-be-displayed image according to the number of pixels of the to-be-displayed image in each preset brightness area and the pre-stored brightness coefficients corresponding to each preset brightness area;

The backlight value corresponding to the to-be-displayed image is determined according to the average brightness coefficient of the to-be-displayed image and a preset backlight value curve, where the backlight value curve includes a corresponding curve between the average brightness coefficient and the backlight value.

In one embodiment, the above-mentioned processor may also be configured to:

According to the number of pixels of the picture to be displayed in each preset brightness region and the pre-stored brightness coefficient corresponding to each preset brightness region, determining the average value of the brightness coefficient of the picture to be displayed includes:

Calculate the average luminance coefficient L _cal of the picture to be displayed according to the following formula:

Wherein, N is the number of preset brightness regions, m×n is the number of pixels in the picture to be displayed; k _i is the brightness coefficient corresponding to the ith preset brightness region, 0≤k _i ≤255, n _i is the number of pixels of the picture to be displayed in the i-th preset brightness area.

In one embodiment, the above-mentioned processor may also be configured to:

The determining the backlight value corresponding to the to-be-displayed image according to the average brightness coefficient of the to-be-displayed image and the preset backlight value curve includes:

Calculate the backlight value BL _cal corresponding to the picture to be displayed according to the following formula:

BL _cal =BL _j +(BL _j+1 -BL _j )·(L _cal -j)

Wherein, j=[L _cal ], BL _j is the preset backlight value corresponding to j, 0≤BL _j ≤255.

In one embodiment, the above-mentioned processor may also be configured to:

The determining the backlight value corresponding to the to-be-displayed image according to the average brightness coefficient of the to-be-displayed image and the preset backlight value curve includes:

determining the preprocessed backlight value corresponding to the to-be-displayed image according to the average brightness coefficient of the to-be-displayed image and a preset backlight value curve;

Get the backlight adjustment ratio;

The backlight value corresponding to the to-be-displayed image is determined according to the pre-processed backlight value corresponding to the to-be-displayed image and the backlight adjustment ratio.

In one embodiment, the above-mentioned processor may also be configured to:

The method also includes:

When displaying the to-be-displayed picture, the backlight value of the previous frame of the displayed picture is gradually adjusted to the backlight value corresponding to the to-be-displayed picture according to a preset step size.

Other embodiments of the present disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or techniques in the technical field not disclosed by the present disclosure . The specification and examples are to be regarded as exemplary only, with the true scope and spirit of the disclosure being indicated by the following claims.

It is to be understood that the present disclosure is not limited to the precise structures described above and illustrated in the accompanying drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (10)

1. a backlight adjustment method, is characterized in that, comprises: Obtain the brightness information of the screen to be displayed; According to the brightness information, count the number of pixels of the picture to be displayed in each preset brightness area; Determine the average brightness coefficient of the to-be-displayed image according to the number of pixels of the to-be-displayed image in each preset brightness area and the pre-stored brightness coefficients corresponding to each preset brightness area; The backlight value corresponding to the to-be-displayed image is determined according to the average brightness coefficient of the to-be-displayed image and a preset backlight value curve, where the backlight value curve includes a corresponding curve between the average brightness coefficient and the backlight value, wherein , determining the backlight value corresponding to the to-be-displayed image according to the average brightness coefficient of the to-be-displayed image and a preset backlight value curve, including: Calculate the backlight value BL _cal corresponding to the picture to be displayed according to the following formula: BL _cal =BL _j +(BL _j+1 -BL _j )·(L _cal -j) Wherein, L _cal is the average value of the luminance coefficient, j=[L _cal ], BL _j is the preset backlight value corresponding to j, 0≦BL _j ≦255. 2 . The method according to claim 1 , wherein determining the to-be-displayed picture according to the number of pixels of the to-be-displayed picture in each preset brightness area and the pre-stored brightness coefficient corresponding to each preset brightness area. 3 . The average value of the brightness coefficient of the display screen, including: Calculate the average luminance coefficient L _cal of the picture to be displayed according to the following formula:

Wherein, N is the number of preset brightness regions, m×n is the number of pixels in the picture to be displayed; k _i is the brightness coefficient corresponding to the ith preset brightness region, 0≤k _i ≤255, n _i is the number of pixels of the picture to be displayed in the i-th preset brightness area. 3. The method according to claim 1, wherein determining the backlight value corresponding to the to-be-displayed image according to the average value of the brightness coefficient of the to-be-displayed image and a preset backlight value curve comprises: determining the preprocessed backlight value corresponding to the to-be-displayed image according to the average brightness coefficient of the to-be-displayed image and a preset backlight value curve; Get the backlight adjustment ratio; The backlight value corresponding to the to-be-displayed image is determined according to the pre-processed backlight value corresponding to the to-be-displayed image and the backlight adjustment ratio. 4. The method according to claim 1, wherein the method further comprises: When displaying the to-be-displayed picture, the backlight value of the previous frame of the displayed picture is gradually adjusted to the backlight value corresponding to the to-be-displayed picture according to a preset step size. 5. A backlight adjustment device, characterized in that, comprising: a first acquiring module, configured to acquire the brightness information of the picture to be displayed; a statistics module, configured to count the number of pixels of the to-be-displayed picture in each preset brightness area according to the brightness information; a first determining module, configured to determine the average value of the brightness coefficients of the to-be-displayed picture according to the number of pixels of the to-be-displayed picture in each preset brightness region and the pre-stored brightness coefficients corresponding to each preset brightness region; The second determination module is configured to determine the backlight value corresponding to the to-be-displayed image according to the average brightness coefficient of the to-be-displayed image and a preset backlight value curve, where the backlight value curve includes the average brightness coefficient and the backlight value The corresponding curve between; Wherein, the second determination module includes: a second calculation sub-module, configured to calculate the backlight value BL _cal corresponding to the to-be-displayed picture according to the following formula: BL _cal =BL _j +(BL _j+1 -BL _j )·(L _cal -j) Wherein, L _cal is the average value of the luminance coefficient, j=[L _cal ], BL _j is the preset backlight value corresponding to j, 0≦BL _j ≦255. 6. The apparatus according to claim 5, wherein the first determining module comprises: The first calculation sub-module is configured to calculate the average value L _cal of the luminance coefficients of the picture to be displayed according to the following formula:

Wherein, N is the number of preset brightness regions, m×n is the number of pixels in the picture to be displayed; k _i is the brightness coefficient corresponding to the ith preset brightness region, 0≤k _i ≤255, n _i is the number of pixels of the picture to be displayed in the i-th preset brightness area. 7. The apparatus according to claim 5, wherein the second determining module comprises: a first determination sub-module, configured to determine the preprocessed backlight value corresponding to the to-be-displayed image according to the average brightness coefficient of the to-be-displayed image and a preset backlight value curve; Get the sub-module to get the backlight adjustment ratio; The second determination sub-module is configured to determine the backlight value corresponding to the to-be-displayed image according to the pre-processed backlight value corresponding to the to-be-displayed image and the backlight adjustment ratio. 8. The apparatus according to claim 5, wherein the apparatus further comprises: The adjustment module is configured to gradually adjust the backlight value of the previous frame of the displayed image to the backlight value corresponding to the to-be-displayed image according to a preset step size when the to-be-displayed image is displayed. 9. A backlight adjustment device, comprising: processor; memory for storing processor-executable instructions; wherein the processor is configured to: Obtain the brightness information of the screen to be displayed; According to the brightness information, count the number of pixels of the picture to be displayed in each preset brightness area; Determine the average brightness coefficient of the to-be-displayed image according to the number of pixels of the to-be-displayed image in each preset brightness area and the pre-stored brightness coefficients corresponding to each preset brightness area; The backlight value corresponding to the to-be-displayed image is determined according to the average brightness coefficient of the to-be-displayed image and a preset backlight value curve, where the backlight value curve includes a corresponding curve between the average brightness coefficient and the backlight value, wherein , determining the backlight value corresponding to the to-be-displayed image according to the average brightness coefficient of the to-be-displayed image and a preset backlight value curve, including: Calculate the backlight value BL _cal corresponding to the picture to be displayed according to the following formula: BL _cal =BL _j +(BL _j+1 -BL _j )·(L _cal -j) Wherein, L _cal is the average value of the luminance coefficient, j=[L _cal ], BL _j is the preset backlight value corresponding to j, 0≦BL _j ≦255. 10. A computer-readable storage medium storing computer instructions, wherein when the computer instructions are executed by a processor, the steps in the method of any one of claims 1 to 4 are implemented.

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