WO2023035939A1

WO2023035939A1 - Backlight adjustment method and apparatus, device, and storage medium

Info

Publication number: WO2023035939A1
Application number: PCT/CN2022/114365
Authority: WO
Inventors: 刘伟明
Original assignee: 深圳创维－Rgb电子有限公司
Priority date: 2021-09-08
Filing date: 2022-08-24
Publication date: 2023-03-16
Also published as: CN113781968A

Abstract

The present application discloses a backlight adjustment method and apparatus, a device, and a storage medium. The method comprises acquiring image information to be adjusted; according to said image information, determining an image to be adjusted; according to a preset backlight adjustment algorithm, calculating an image brightness value of said image; acquiring a preset time domain filter value and a reference frame image brightness value; according to the preset time domain filter value and the reference frame image brightness value, adjusting the image brightness value of said image, and obtaining an adjustment result; and adjusting the brightness of a backlight lamp according to the adjustment result.

Description

Backlight adjustment method, device, equipment and storage medium

priority information

This application claims priority to a Chinese patent application with application number 202111054158.3 filed on September 8, 2021, the entire contents of which are incorporated herein by reference.

technical field

The present application relates to the field of display technology, and in particular to a backlight adjustment method, device, equipment and storage medium.

Background technique

With the rapid development of the radio and television industry and the continuous acceleration of the digitalization process, the local dimming (local backlight adjustment) function came into being. It can reduce the real-time power consumption of the whole machine, improve the contrast, expand and enhance the HDR function, and make the display picture better. The brightness of the picture is established through the RGB input signal by adding specific parts of the RGB signal together. Videos are composed of image frames. If the adjacent images of the image frames that make up the video have obvious contrast between light and dark, obvious flickering problems will occur.

The above content is only used to assist in understanding the technical solution of the present application, and does not mean that the above content is admitted as prior art.

Contents of the invention

The main purpose of the present application is to provide a backlight adjustment method, device, equipment and storage medium, aiming to solve the technical problem of obvious flickering in the prior art when playing a film source with a clear contrast between light and dark.

In order to achieve the above object, the present application provides a backlight adjustment method, the method includes the following steps:

Acquiring image information to be adjusted, and determining an image to be adjusted according to the image information to be adjusted;

calculating the image brightness value of the image to be adjusted according to a preset backlight adjustment algorithm;

Acquiring a preset time-domain filter value and a reference frame image brightness value, adjusting the image brightness value of the image to be adjusted according to the preset time-domain filter value and the reference frame image brightness value, and obtaining an adjustment result;

The brightness of the backlight is adjusted according to the adjustment result.

In one embodiment, the step of calculating the image brightness value of the image to be adjusted according to the preset backlight adjustment algorithm includes:

Acquiring image histogram information of the image to be adjusted, the image histogram information including pixel RGB values and pixel occurrence frequencies of pixels in the image to be adjusted;

The image brightness value of the image to be adjusted is calculated according to the occurrence frequency of the pixel, the RGB value of the pixel point, and a preset backlight adjustment algorithm.

In one embodiment, the preset backlight adjustment algorithm is:

Wherein, M is the image brightness value of the image to be adjusted, n is the number of different pixels in the histogram information, Ri is the R value in the i-th pixel RGB value in the histogram information, and Gi is The G value in the RGB value of the i-th pixel in the histogram information, Bi is the B value in the RGB value of the i-th pixel in the histogram information, and Pi is the i-th pixel in the histogram information The pixel frequency of points.

In one embodiment, the acquisition of the preset time domain filter value and the brightness value of the reference frame image is performed on the image brightness value of the image to be adjusted according to the preset time domain filter value and the brightness value of the reference frame image Reconciliation, the steps to obtain reconciliation results, including:

Obtaining a reference frame image brightness value, where the reference frame image brightness value is an image brightness value of a previous frame image adjacent to the image to be adjusted;

Acquire a preset time domain filter value, and determine a target time domain filter value range according to the brightness value of the reference frame image and the preset time domain filter value;

The image brightness value of the image to be adjusted is adjusted according to the target time-domain filter value range to obtain an adjustment result.

In one embodiment, the step of adjusting the image brightness value of the image to be adjusted according to the target time-domain filter value range, and obtaining an adjustment result includes:

judging whether the image brightness value of the image to be adjusted is within the range of the target temporal filter value;

When the image brightness value of the image to be adjusted is within the target temporal filter value range, the image brightness value of the image to be adjusted is used as the adjustment result.

In one embodiment, after the step of judging whether the image brightness value of the image to be adjusted is within the range of the target temporal filter value, it further includes:

When the image brightness value of the image to be adjusted is not within the target time-domain filter value range, determine a first filter value according to the target time-domain filter value range;

judging whether the image brightness value of the image to be adjusted is smaller than the first filter value;

When the image brightness value of the image to be adjusted is smaller than the first filter value, the first filter value is used as the adjustment result.

Get the number of preset partitions;

Partitioning the image to be adjusted according to the preset number of partitions to obtain a partitioned image of the image to be adjusted;

Calculate the brightness value of the sub-region image of the sub-region image according to a preset backlight adjustment algorithm.

In addition, in order to achieve the above purpose, the present application also provides a backlight adjustment device, which includes:

An acquisition module, configured to acquire image information to be adjusted, and determine an image to be adjusted according to the image information to be adjusted;

A calculation module, configured to calculate the image brightness value of the image to be adjusted according to a preset backlight adjustment algorithm;

An adjustment module, configured to obtain a preset time-domain filter value and a reference frame image brightness value, adjust the image brightness value of the image to be adjusted according to the preset time-domain filter value and the reference frame image brightness value, and obtain adjustment results;

A control module, configured to control the brightness of the backlight according to the adjustment result.

In addition, in order to achieve the above purpose, the present application also proposes a backlight adjustment device, which includes: a memory, a processor, and a backlight adjustment program stored in the memory and operable on the processor, the backlight The adjustment program is configured to implement the steps of the backlight adjustment method as described above.

In addition, to achieve the above purpose, the present application also proposes a storage medium, on which a backlight adjustment program is stored, and when the backlight adjustment program is executed by a processor, the steps of the above-mentioned backlight adjustment method are implemented.

The application discloses a backlight adjustment method, device, equipment and storage medium. The method includes: acquiring image information to be adjusted, determining the image to be adjusted according to the image information to be adjusted; calculating the image brightness value of the image to be adjusted according to a preset backlight adjustment algorithm; acquiring a preset time domain filter value and a reference frame image Brightness value, adjusting the image brightness value of the image to be adjusted according to the preset time domain filter value and the reference frame image brightness value to obtain an adjustment result; adjusting the brightness of the backlight according to the adjustment result. Because this application calculates the image brightness value of the image to be adjusted, adjusts the image brightness value of the image to be adjusted according to the preset time-domain filter value and the reference frame image brightness value, because the reference frame image brightness value is adjacent to the image to be adjusted The image brightness value of the previous frame image, so the difference between the adjusted image brightness value of the image to be adjusted and the reference frame image brightness value is within a certain range, so that two adjacent frames of images will not be played due to the contrast between light and dark. Obvious and flickering problem. Solve the existing problem of obvious flickering when playing a film source with a clear contrast between light and dark, and improve the user's viewing experience.

Description of drawings

Fig. 1 is a schematic structural diagram of a backlight adjustment device in a hardware operating environment involved in the embodiment of the present application;

FIG. 2 is a schematic flow chart of the first embodiment of the backlight adjustment method of the present application;

FIG. 3 is a schematic flowchart of the second embodiment of the backlight adjustment method of the present application;

FIG. 4 is a structural block diagram of the first embodiment of the backlight adjusting device of the present application.

The realization, functional features and advantages of the present application will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

Detailed ways

It should be understood that the specific embodiments described here are only used to explain the present application, not to limit the present application.

Referring to FIG. 1 , FIG. 1 is a schematic structural diagram of a backlight adjustment device in a hardware operating environment involved in an embodiment of the present application.

As shown in FIG. 1 , the backlight adjustment device may include: a processor 1001, such as a central processing unit (Central Processing Unit, CPU), a communication bus 1002, a user interface 1003, and a memory 1005. Wherein, the communication bus 1002 is used to realize connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface and a wireless interface. The memory 1005 may be a high-speed random access memory (Random Access Memory, RAM), or a stable non-volatile memory (Non-Volatile Memory, NVM), such as a disk memory. Optionally, the memory 1005 may also be a storage device independent of the aforementioned processor 1001 .

Those skilled in the art can understand that the structure shown in FIG. 1 is not limited to the backlight adjustment device, and may include more or less components than shown in the figure, or combine some components, or arrange different components.

As shown in FIG. 1 , the memory 1005 as a storage medium may include an operating system, a user interface module, and a backlight adjustment program.

In the backlight adjustment device shown in FIG. 1 , the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 in the backlight adjustment device of the present application can be set in the backlight adjustment device, and the backlight adjustment device passes The processor 1001 invokes the backlight adjustment program stored in the memory 1005, and executes the backlight adjustment method provided in the embodiment of the present application.

Based on the above-mentioned backlight adjustment device, an embodiment of the present application provides a backlight adjustment method. Referring to FIG. 2 , FIG. 2 is a schematic flowchart of a first embodiment of the backlight adjustment method of the present application.

In this embodiment, the backlight adjustment method includes the following steps:

Step S10: Obtain image information to be adjusted, and determine an image to be adjusted according to the image information to be adjusted.

It should be noted that the execution subject of this embodiment may be a computing service device with data processing, network communication and program running functions, such as a mobile phone, a tablet computer, a personal computer, etc., or an electronic device capable of realizing the above functions. equipment or a TV with local dimming function, etc. Hereinafter, the present embodiment and the following embodiments will be described by taking the television as an example.

It should be noted that the image information to be adjusted may be a video or several frames of images to be played on the video playback device. The determining the image to be adjusted according to the image information to be adjusted may be acquiring an image frame in the image information to be adjusted, and using the image frame as the image to be adjusted.

Step S20: Calculate the image brightness value of the image to be adjusted according to a preset backlight adjustment algorithm.

It should be noted that the preset backlight adjustment algorithm may be an algorithm capable of calculating the image brightness value of the image according to information such as YUV or RGB of the image to be adjusted.

Further, in order to obtain the image brightness value of the image to be adjusted more accurately, the step S20 includes: acquiring image histogram information of the image to be adjusted, the image histogram information including the pixel points in the image to be adjusted Pixel RGB value and pixel occurrence frequency; calculate the image brightness value of the image to be adjusted according to the pixel occurrence frequency, the pixel RGB value and a preset backlight adjustment algorithm.

It should be noted that the image histogram information may be pixel point information and pixel frequency information in the image to be adjusted. It may be to perform histogram processing on the image to be adjusted to obtain image histogram information of the image to be adjusted. The preset backlight adjustment algorithm is:

In specific implementation, for example, for an image information, the image frame of the image information has 1000 frames, the image histogram information of the 1000 frames of images is calculated respectively, and the pixel RGB value and pixel appearance of the pixel in the image are obtained Frequency, and then substituted into the above algorithm to calculate the brightness value of the image, for example, the image histogram of an image shows that it is composed of two different pixel points, namely pixel point A and pixel point B, and the frequency of occurrence is A The frequency of occurrence is 100, the frequency of B is 400, and the RGB values of A are 200 for R, 100 for G, and 0 for B. The RGB values of B are 100 for R, 90 for G, and 210 for B. Substituting into the above formula, the calculation is M=100[(299*200)+(587*100)+(114*0)]/1000+400[(299*100)+(587*90)+(114* 210)]/1000=100*118.5+400*106.67=11850+10667=22517. That is, the image brightness value of the image frame is 22517. Since each type of LCD display has a difference between cool and warm colors, and even different parts of the same type of screen may have differences due to process differences, so it is necessary to continue to do liquid crystal compensation here, and use liquid crystal compensation to adjust the calculated image brightness value. Get more accurate calculation results.

Step S30: Obtain a preset time-domain filter value and a reference frame image brightness value, adjust the image brightness value of the image to be adjusted according to the preset time-domain filter value and the reference frame image brightness value, and obtain an adjustment result .

It should be noted that the preset time-domain filter value may be a preset threshold value for the difference between the image brightness values of two adjacent image frames, for example, the preset time-domain filter value may be set to 25, then in When the absolute value of the difference between the image brightness values of two adjacent image frames is greater than 25, it indicates that the brightness of the two adjacent frames changes too much, and brightness adjustment is required. Adjusting the image brightness value of the image to be adjusted according to the preset time domain filter value and the reference frame image brightness value may be adjusting the image to be adjusted according to the preset time domain filter value and the reference frame image brightness value The image brightness value of the image, so that the absolute value of the difference between the image brightness value of the image to be adjusted and the reference frame image brightness value is less than or equal to the preset time domain filter value.

Step S40: adjusting the brightness of the backlight according to the adjustment result.

It should be noted that the backlight control chip may be a chip capable of adjusting the brightness of the backlight.

In a specific implementation, after receiving the adjustment result, the backlight control chip in the television adjusts the brightness of the backlight according to the adjustment result.

In this embodiment, the image information to be adjusted is acquired, and the image to be adjusted is determined according to the image information to be adjusted; the image brightness value of the image to be adjusted is calculated according to the preset backlight adjustment algorithm; the preset time domain filter value and the reference frame image brightness are obtained value, adjusting the image brightness value of the image to be adjusted according to the preset time domain filter value and the reference frame image brightness value to obtain an adjustment result; adjusting the brightness of the backlight according to the adjustment result. Since this embodiment calculates the image brightness value of the image to be adjusted, the image brightness value of the image to be adjusted is adjusted according to the preset time-domain filter value and the brightness value of the image of the reference frame, because the brightness value of the image of the reference frame is the same as that of the image to be adjusted. The image brightness value of the adjacent previous frame image, so the difference between the adjusted image brightness value of the image to be adjusted and the reference frame image brightness value is within a certain range, so that the adjacent two frame images will not be played due to brightness and darkness. Contrast is sharp and flickering problem arises. Solve the existing problem of obvious flickering when playing a film source with a clear contrast between light and dark, and improve the user's viewing experience.

Referring to FIG. 3 , FIG. 3 is a schematic flowchart of a second embodiment of a backlight adjustment method of the present application.

Based on the first embodiment above, in this embodiment, the step S30 includes:

Step S301: Obtain a reference frame image brightness value, the reference frame image brightness value being an image brightness value of a previous frame image adjacent to the image to be adjusted.

It should be understood that, if the image to be adjusted is the first frame of image in the image information, adjustment may be started from the second frame of image without adjustment.

Step S302: Obtain the preset time domain filter value, and determine the target time domain filter value range according to the brightness value of the reference frame image and the preset time domain filter value.

It should be noted that the preset time-domain filter value may be a preset threshold value for the difference between image brightness values of two adjacent image frames. For example, the preset time-domain filter value may be set to 25, that is, The difference between the image brightness values of two adjacent frames of images does not exceed 25, and may also be determined according to empirical values, which is not limited in this embodiment. The determination of the target time domain filter value range according to the brightness value of the reference frame image and the preset time domain filter value may be obtained by subtracting the preset time domain filter value from the brightness value of the reference frame image to obtain the target time domain filter value The lower limit value of the range, the lower limit value of the target time domain filter value range is obtained according to the brightness value of the reference frame image plus the preset time domain filter value, and the target time domain value is generated according to the lower limit value and the upper limit value Filter value range. For example, if the luminance value of the reference frame image is 180, then the range of the target temporal filter value determined according to the luminance value of the reference frame image is 155-205.

Step S303: Adjust the image brightness value of the image to be adjusted according to the target temporal filter value range, and obtain an adjustment result.

It should be noted that the adjusting the image brightness value of the image to be adjusted according to the target time domain filter value range may be adjusting the image brightness value to be within the target time domain filter value range.

Further, in order to solve the flickering problem caused by the obvious brightness change of the image frame during video playback, after the step S303, it also includes: judging whether the image brightness value of the image to be adjusted is within the target time-domain filter value range ; when the image brightness value of the image to be adjusted is within the range of the target temporal filter value, taking the image brightness value of the image to be adjusted as the adjustment result.

It should be understood that when the image brightness value of the image to be adjusted is within the range of the target time-domain filter value, it can be considered that the brightness of the two adjacent frames of images does not change much, and no flickering problem occurs. The image brightness value of the image to be adjusted may be directly used as the adjustment result without adjusting the image brightness value of the image to be adjusted.

Further, after the judging whether the image brightness value of the image to be adjusted is within the range of the target time domain filter value, it also includes: when the image brightness value of the image to be adjusted is not within the target time domain filter value When within the range, determine the first filter value according to the target time domain filter value range; judge whether the image brightness value of the image to be adjusted is less than the first filter value; if the image brightness value of the image to be adjusted is smaller than the set When the first filter value is used, the first filter value is used as the adjustment result.

It should be noted that the first filter value may be the lower limit of the target time domain filter value range, for example, if the target time domain filter value range is 140-160, then the first filter value may be 140. When the image brightness value of the image to be adjusted is smaller than the first filter value, the first filter value is used as the adjustment result.

It should be understood that after the step of judging whether the image brightness value of the image to be adjusted is smaller than the first filter value, it further includes: if the image brightness value of the image to be adjusted is not smaller than the first filter value, then judging Whether the image brightness value of the image to be adjusted is greater than the upper limit value of the target time domain filter value range, and when the image brightness value of the image to be adjusted is greater than the upper limit value of the target time domain filter value range, the target time domain filter value The upper limit value of the domain filter value range is used as the adjustment result. For example, if the target time domain filter value range is 140-160, then the upper limit value of the target time domain filter value range may be 160. When the image brightness value of the image to be adjusted is greater than 160, 160 is used as the adjustment result of the image to be adjusted.

Further, the step of calculating the image brightness value of the image to be adjusted according to the preset backlight adjustment algorithm includes: obtaining a preset number of partitions; partitioning the image to be adjusted according to the preset number of partitions to obtain the Describe the partition image of the image to be adjusted; calculate the brightness value of the partition image of the partition image according to a preset backlight adjustment algorithm.

It should be noted that the number of partitions may be the number of partitions for partitioning the image to be adjusted, that is, the number of equally divided parts of the image to be adjusted. If the number of partitions is 4, the image to be adjusted is divided into equal parts. 4 partitions. The partitioned image may be a partitioned image of the image to be adjusted, and the calculation of the brightness value of the partitioned image of the partitioned image according to the preset backlight adjustment algorithm may refer to the above method for calculating the image brightness value of the image to be adjusted. This embodiment is here Not limited.

It should be understood that in this embodiment, each frame of the image to be adjusted can be partitioned to obtain a partitioned image of each frame of the image to be adjusted, and the image brightness value of the partitioned image can be calculated to adjust the brightness of the backlight for the partition. . For example, if the image brightness values of the subregion images in the same image to be recognized are too different, the brightness of the backlight of the subregion images can be adjusted separately, so that the difference between the image brightness values of each subregion image in the image to be recognized is within a preset range Inside. Improve user viewing experience.

In this embodiment, the reference frame image brightness value of the previous frame image adjacent to the image to be adjusted is obtained; the preset time domain filter value is obtained, and determined according to the reference frame image brightness value and the preset time domain filter value A target time-domain filter value range: adjusting the image brightness value of the image to be adjusted according to the target time-domain filter value range to obtain an adjustment result. In this embodiment, the target temporal filter value range is determined according to the reference frame image brightness value and the preset temporal filter value by acquiring the reference frame image brightness value of the previous frame image adjacent to the image to be adjusted; The image brightness value of the image to be adjusted is adjusted according to the target time-domain filter value range to obtain an adjustment result. Make the difference between the image brightness value of the image to be adjusted and the reference frame image brightness value of the adjacent previous frame image within a certain range, so that when the video is played, the brightness of the image frame will not cause flickering problems.

Referring to FIG. 4 , FIG. 4 is a structural block diagram of a first embodiment of a backlight adjusting device of the present application.

As shown in Figure 4, the backlight adjustment device proposed in the embodiment of the present application includes:

The acquiring module 10 is configured to acquire image information to be adjusted, and determine an image to be adjusted according to the image information to be adjusted.

The calculation module 20 is configured to calculate the image brightness value of the image to be adjusted according to a preset backlight adjustment algorithm.

An adjustment module 30, configured to acquire a preset time-domain filter value and a reference frame image brightness value, and adjust the image brightness value of the image to be adjusted according to the preset time-domain filter value and the reference frame image brightness value, Get the adjustment result.

The control module 40 is configured to send the adjustment result to the backlight control chip, so that the backlight control chip controls the brightness of the backlight according to the adjustment result.

This embodiment includes acquiring the image information to be adjusted, determining the image to be adjusted according to the image information to be adjusted; calculating the image brightness value of the image to be adjusted according to a preset backlight adjustment algorithm; acquiring a preset time domain filter value and a reference frame image Brightness value, adjusting the image brightness value of the image to be adjusted according to the preset time domain filter value and the reference frame image brightness value to obtain an adjustment result; adjusting the brightness of the backlight according to the adjustment result. Since this embodiment calculates the image brightness value of the image to be adjusted, the image brightness value of the image to be adjusted is adjusted according to the preset time-domain filter value and the brightness value of the image of the reference frame, because the brightness value of the image of the reference frame is the same as that of the image to be adjusted. The image brightness value of the adjacent previous frame image, so the difference between the adjusted image brightness value of the image to be adjusted and the reference frame image brightness value is within a certain range, so that the adjacent two frame images will not be played due to brightness and darkness. Contrast is sharp and flickering problem arises. Solve the existing problem of obvious flickering when playing a film source with a clear contrast between light and dark, and improve the user's viewing experience.

It should be noted that the workflow described above is only illustrative and does not limit the scope of protection of this application. In practical applications, those skilled in the art can select part or all of them to implement according to actual needs. The purpose of the scheme of this embodiment is not limited here.

In addition, for technical details that are not described in detail in this embodiment, refer to the parameter operation method provided in any embodiment of the present application, which will not be repeated here.

Based on the above-mentioned first embodiment of the backlight adjusting device of the present application, a second embodiment of the backlight adjusting device of the present application is proposed.

In this embodiment, the calculation module 20 is further configured to acquire image histogram information of the image to be adjusted, the image histogram information including pixel RGB values and pixel occurrences of pixels in the image to be adjusted Frequency: calculate the image brightness value of the image to be adjusted according to the pixel occurrence frequency, the pixel RGB value and a preset backlight adjustment algorithm.

Further, the preset backlight adjustment algorithm is:

Further, the adjustment module 30 is also used to obtain a reference frame image brightness value, the reference frame image brightness value is an image brightness value of a previous frame image adjacent to the image to be adjusted; obtain a preset time domain A filter value, determining a target time domain filter value range according to the reference frame image brightness value and the preset time domain filter value; adjusting the image brightness value of the image to be adjusted according to the target time domain filter value range, Get the adjustment result.

Further, the adjustment module 30 is also used to judge whether the image brightness value of the image to be adjusted is within the range of the target time domain filter value; when the image brightness value of the image to be adjusted is within the target time domain When the filter value is within the range, the image brightness value of the image to be adjusted is used as the adjustment result.

Further, the adjustment module 30 is further configured to determine a first filter value according to the target time domain filter value range when the image brightness value of the image to be adjusted is not within the target time domain filter value range; judging whether the image brightness value of the image to be adjusted is smaller than the first filter value; when the image brightness value of the image to be adjusted is smaller than the first filter value, using the first filter value as the adjustment result .

Further, the calculation module 20 is also used to obtain a preset number of partitions; partition the image to be adjusted according to the preset number of partitions to obtain a partition image of the image to be adjusted; according to a preset backlight adjustment algorithm Calculate the brightness value of the sub-region image of the sub-region image.

For other embodiments or specific implementations of the backlight adjusting device of the present application, reference may be made to the foregoing method embodiments, which will not be repeated here.

In addition, the embodiment of the present application also proposes a storage medium, on which a backlight adjustment program is stored, and when the backlight adjustment program is executed by a processor, the steps of the above-mentioned backlight adjustment method are implemented.

It should be noted that, as used herein, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or system comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or system. Without further limitations, an element defined by the phrase "comprising a..." does not preclude the presence of additional identical elements in the process, method, article or system comprising that element.

The serial numbers of the above embodiments of the present application are for description only, and do not represent the advantages and disadvantages of the embodiments.

Through the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus a necessary general-purpose hardware platform, and of course also by hardware, but in many cases the former is better implementation. Based on such an understanding, the technical solution of the present application can be embodied in the form of a software product in essence or the part that contributes to the prior art, and the computer software product is stored in a storage medium (such as read-only memory/random access memory, magnetic disk, optical disk), including several instructions to make a terminal device (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) execute the methods described in various embodiments of the present application.

The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structures or equivalent process transformations made by using the description of the application and the accompanying drawings are directly or indirectly used in other related technical fields. , are all included in the patent protection scope of the present application in the same way.

Claims

A backlight adjustment method, wherein the backlight adjustment comprises the following steps:

Acquiring image information to be adjusted, and determining an image to be adjusted according to the image information to be adjusted;

calculating the image brightness value of the image to be adjusted according to a preset backlight adjustment algorithm;

Acquiring a preset time-domain filter value and a reference frame image brightness value, adjusting the image brightness value of the image to be adjusted according to the preset time-domain filter value and the reference frame image brightness value, and obtaining an adjustment result;

The brightness of the backlight is adjusted according to the adjustment result.
The backlight adjustment method according to claim 1, wherein the step of calculating the image brightness value of the image to be adjusted according to a preset backlight adjustment algorithm comprises:

Acquiring image histogram information of the image to be adjusted, the image histogram information including pixel RGB values and pixel occurrence frequencies of pixels in the image to be adjusted;

The image brightness value of the image to be adjusted is calculated according to the occurrence frequency of the pixel, the RGB value of the pixel point, and a preset backlight adjustment algorithm.
The backlight adjustment method according to claim 2, wherein the preset backlight adjustment algorithm is:

Wherein, M is the image brightness value of the image to be adjusted, n is the number of different pixels in the histogram information, R i is the R value in the i-th pixel RGB value in the histogram information, G i is the G value in the i-th pixel RGB value in the histogram information, Bi is the B value in the i-th pixel RGB value in the histogram information, and P i is in the histogram information The pixel occurrence frequency of the i-th pixel.
The backlight adjustment method according to claim 1, wherein said acquiring a preset time domain filter value and a reference frame image brightness value, and treating said to-be The step of adjusting the image brightness value of the image to obtain the adjustment result includes:

Obtaining a reference frame image brightness value, where the reference frame image brightness value is an image brightness value of a previous frame image adjacent to the image to be adjusted;

Acquire a preset time domain filter value, and determine a target time domain filter value range according to the brightness value of the reference frame image and the preset time domain filter value;

The image brightness value of the image to be adjusted is adjusted according to the target time-domain filter value range to obtain an adjustment result.
The backlight adjustment method according to claim 4, wherein the step of adjusting the image brightness value of the image to be adjusted according to the target time-domain filter value range, and obtaining an adjustment result comprises:

judging whether the image brightness value of the image to be adjusted is within the range of the target temporal filter value;

When the image brightness value of the image to be adjusted is within the target temporal filter value range, the image brightness value of the image to be adjusted is used as the adjustment result.
The backlight adjustment method according to claim 5, wherein after the step of judging whether the image brightness value of the image to be adjusted is within the range of the target time-domain filter value, further comprising:

When the image brightness value of the image to be adjusted is not within the target time-domain filter value range, determine a first filter value according to the target time-domain filter value range;

judging whether the image brightness value of the image to be adjusted is smaller than the first filter value;

When the image brightness value of the image to be adjusted is smaller than the first filter value, the first filter value is used as the adjustment result.
The backlight adjustment method according to claim 6, wherein the first filter value is a lower limit value of the target time-domain filter value range.
The backlight adjustment method according to claim 6, wherein, after the step of judging whether the image brightness value of the image to be adjusted is smaller than the first filter value, further comprising:

If the image brightness value of the image to be adjusted is not less than the first filter value, then judge whether the image brightness value of the image to be adjusted is greater than the upper limit value of the target temporal filter value range;

When the image brightness value of the image to be adjusted is greater than the upper limit value of the target time domain filter value range, the upper limit value of the target time domain filter value range is used as the adjustment result.
The backlight adjustment method according to any one of claims 1-8, wherein the step of calculating the image brightness value of the image to be adjusted according to a preset backlight adjustment algorithm comprises:

Get the number of preset partitions;

Partitioning the image to be adjusted according to the preset number of partitions to obtain a partitioned image of the image to be adjusted;

Calculate the brightness value of the sub-region image of the sub-region image according to a preset backlight adjustment algorithm.
A backlight adjustment device, wherein the backlight adjustment device comprises:

An acquisition module, configured to acquire image information to be adjusted, and determine an image to be adjusted according to the image information to be adjusted;

A calculation module, configured to calculate the image brightness value of the image to be adjusted according to a preset backlight adjustment algorithm;

An adjustment module, configured to obtain a preset time-domain filter value and a reference frame image brightness value, adjust the image brightness value of the image to be adjusted according to the preset time-domain filter value and the reference frame image brightness value, and obtain adjustment results;

A control module, configured to control the brightness of the backlight according to the adjustment result.
The backlight adjustment device according to claim 10, wherein the calculation module is further configured to obtain image histogram information of the image to be adjusted, and the image histogram information includes pixel points of pixels in the image to be adjusted RGB value and pixel occurrence frequency; calculate the image brightness value of the image to be adjusted according to the pixel occurrence frequency, the pixel RGB value and a preset backlight adjustment algorithm.
The backlight adjustment device according to claim 10, wherein the adjustment module is further used to obtain a reference frame image brightness value, and the reference frame image brightness value is an image of a previous frame image adjacent to the image to be adjusted brightness value; obtain a preset time-domain filter value, determine a target time-domain filter value range according to the reference frame image brightness value and the preset time-domain filter value; The image brightness value of the image is adjusted to obtain an adjustment result.
The backlight adjustment device according to claim 10, wherein the calculation module is further used to obtain a preset number of partitions; partition the image to be adjusted according to the preset number of partitions to obtain the partitions of the image to be adjusted Image: calculating the brightness value of the sub-region image of the sub-region image according to a preset backlight adjustment algorithm.
A backlight adjustment device, wherein the device includes: a memory, a processor, and a backlight adjustment program stored on the memory and operable on the processor, the backlight adjustment program configured to implement the The backlight adjustment method described in any one of to 9.
A storage medium, wherein a backlight adjustment program is stored on the storage medium, and when the backlight adjustment program is executed by a processor, the backlight adjustment method according to any one of claims 1 to 9 is realized.