CN110599967A - Image display method and device, electronic equipment and readable storage medium - Google Patents
Image display method and device, electronic equipment and readable storage medium Download PDFInfo
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- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
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- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
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Abstract
The embodiment of the application provides an image display method and device, electronic equipment and a readable storage medium, and relates to the technical field of image display. The method comprises the following steps: obtaining a primary color component maximum value and a primary color component average value in the current frame image according to the primary color components of each pixel point in the current frame image to be displayed; carrying out weighted summation on the obtained values to obtain a target brightness reference value; obtaining a target pulse width modulation duty ratio according to a preset corresponding relation between the brightness reference value and the pulse width modulation duty ratio and the target brightness reference value; and adjusting the backlight brightness of the backlight module by adopting the target pulse width modulation duty ratio, and displaying the current frame image. Therefore, the backlight brightness is adjusted according to the target brightness reference value corresponding to the actual brightness of the current frame image, and the problems of poor backlight control effect and poor display effect caused by large deviation of the calculated brightness and the actual brightness of the frame image can be effectively solved.
Description
Technical Field
The present application relates to the field of image display technologies, and in particular, to an image display method and apparatus, an electronic device, and a readable storage medium.
Background
In the backlight control of the current display device (e.g., a liquid crystal television), generally, the brightness of a frame image is obtained according to a brightness equation, and then the backlight brightness is adjusted according to the brightness. Wherein the luminance equation is: y is 0.30R +0.59G + 0.11B. However, in some cases, the luminance calculated in the above manner has a large deviation from the actual luminance of the frame image, which may result in poor backlight luminance control effect and poor display effect. For example, the R (red) component and the G (green) component of the frame image are very small, and the B (blue) component is very large, and the actual luminance of the frame image is much larger than the luminance calculated according to the above luminance equation.
Disclosure of Invention
In view of the above, an object of the present application is to provide an image display method, an image display apparatus, an electronic device and a readable storage medium, which calculate a target luminance reference value corresponding to an actual luminance of a current frame image according to a maximum value of a primary color component and an average value of the primary color component in the current frame image, and then adjust a backlight luminance according to the target luminance reference value, so as to effectively solve the problems of poor backlight control effect and poor display effect caused by a large deviation between the calculated luminance and the actual luminance of the frame image.
In order to achieve the above purpose, the embodiments of the present application employ the following technical solutions:
in a first aspect, an embodiment of the present application provides an image display method, where the method includes:
acquiring a current frame image to be displayed;
determining the maximum value of the primary color component in the current frame image according to the primary color component of each pixel point in the current frame image, and calculating the average value of the primary color components in the current frame image;
carrying out weighted summation on the obtained maximum value of the primary color components and the average value of the primary color components to obtain a target brightness reference value;
obtaining a target pulse width modulation duty ratio according to a preset corresponding relation between a brightness reference value and a pulse width modulation duty ratio and the target brightness reference value;
and adjusting the backlight brightness of a backlight module by adopting the target pulse width modulation duty ratio, and displaying the current frame image.
In an optional embodiment, before the displaying the current frame image, the method further includes:
obtaining a target gain according to a preset corresponding relation between a pulse width modulation duty ratio and a gain and the target pulse width modulation duty ratio;
and processing the current frame image according to the target gain to obtain a processed current frame image.
In an optional embodiment, the obtaining a target pwm duty ratio according to a preset correspondence between a brightness reference value and a pwm duty ratio and the target brightness reference value includes:
obtaining an initial target pulse width modulation duty ratio corresponding to the target brightness reference value according to a preset corresponding relation between the brightness reference value and the pulse width modulation duty ratio and the target brightness reference value;
judging whether the initial target pulse width modulation duty ratio needs to be adjusted or not according to the target pulse width modulation duty ratio corresponding to at least one frame of historical frame image before the current frame image;
if so, increasing or decreasing the initial target pulse width modulation duty ratio according to the target pulse width modulation duty ratio corresponding to the at least one frame of historical frame image to obtain the target pulse width modulation duty ratio;
and if not, taking the initial target pulse width modulation duty ratio as the target pulse width modulation duty ratio.
In an optional embodiment, after the acquiring the current frame image to be displayed, the method further includes:
judging whether the format of the current frame image is an RGB format;
if not, the current frame image is subjected to format conversion to obtain the current frame image in the RGB format.
In a second aspect, an embodiment of the present application provides an image display apparatus, including:
the acquisition module is used for acquiring a current frame image to be displayed;
the first calculation module is used for determining the maximum value of the primary color component in the current frame image according to the primary color component of each pixel point in the current frame image and calculating the average value of the primary color components in the current frame image;
the second calculation module is used for carrying out weighted summation on the obtained primary color component maximum value and the obtained primary color component average value to obtain a target brightness reference value;
the duty ratio determining module is used for obtaining a target pulse width modulation duty ratio according to the preset corresponding relation between the brightness reference value and the pulse width modulation duty ratio and the target brightness reference value;
the adjusting module is used for adjusting the backlight brightness of the backlight module by adopting the target pulse width modulation duty ratio;
and the display module is used for displaying the current frame image.
In an alternative embodiment, the apparatus further comprises:
the gain determining module is used for obtaining a target gain according to a preset corresponding relation between the pulse width modulation duty ratio and the gain and the target pulse width modulation duty ratio;
and the image processing module is used for processing the current frame image according to the target gain to obtain a processed current frame image.
In an optional embodiment, the duty cycle determining module is specifically configured to:
obtaining an initial target pulse width modulation duty ratio corresponding to the target brightness reference value according to a preset corresponding relation between the brightness reference value and the pulse width modulation duty ratio and the target brightness reference value;
judging whether the initial target pulse width modulation duty ratio needs to be adjusted or not according to the target pulse width modulation duty ratio corresponding to at least one frame of historical frame image before the current frame image;
if so, increasing or decreasing the initial target pulse width modulation duty ratio according to the target pulse width modulation duty ratio corresponding to the at least one frame of historical frame image to obtain the target pulse width modulation duty ratio;
and if not, taking the initial target pulse width modulation duty ratio as the target pulse width modulation duty ratio.
In an optional embodiment, the obtaining module is further configured to:
judging whether the format of the current frame image is an RGB format;
if not, the current frame image is subjected to format conversion to obtain the current frame image in the RGB format.
In a third aspect, an embodiment of the present application provides an electronic device, including a processor and a memory, where the memory stores machine executable instructions that can be executed by the processor, and the processor can execute the machine executable instructions to implement the image display method according to any one of the foregoing embodiments.
In a fourth aspect, the present application provides a readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the image display method according to any one of the foregoing embodiments.
According to the image display method, the image display device, the electronic device and the readable storage medium, after the current frame image to be displayed is obtained, the maximum value of the primary color component and the average value of the primary color component in the current frame image are obtained according to the three primary color components of each pixel point in the current frame image. And then carrying out weighted summation operation on the maximum value of the primary color component and the average value of the primary color component to obtain a target brightness reference value. And then obtaining a target pulse width modulation duty ratio corresponding to the target brightness reference value based on the preset corresponding relation between the brightness reference value and the pulse width modulation duty ratio. And finally, adjusting the backlight brightness of the backlight module by adopting the target pulse width modulation duty ratio, and displaying the current frame image. Therefore, the three primary color components of each pixel point in the current frame image are counted firstly, then the target brightness reference value corresponding to the actual brightness of the current frame image is calculated according to the maximum value of the primary color components and the average value of the primary color components, and finally the backlight brightness is controlled according to the target brightness reference value, so that the difference between the adjusted backlight brightness and the expected backlight brightness of the current frame image is very small, and the problems of poor backlight control effect and poor display effect caused by large deviation between the calculated brightness and the actual brightness of the frame image are effectively solved.
Further, a target gain can be determined according to the target pulse width modulation duty ratio, then the current frame image is processed according to the target gain, and the processed current frame image is displayed. Therefore, the brightness of the current frame image can be improved in a data compensation mode, the brightness loss after the backlight brightness is reduced is solved, and the detail and the layering sense of a dark field can be improved.
Further, the initial target pulse width modulation duty ratio obtained by the correspondence between the brightness reference value and the pulse width modulation duty ratio can be adjusted according to the target pulse width modulation duty ratio corresponding to at least one frame of historical frame image before the current frame image, and the backlight brightness can be controlled according to the obtained target pulse width modulation duty ratio to avoid the flicker of the picture.
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a block schematic diagram of an electronic device provided in an embodiment of the present application;
FIG. 2 is a flowchart illustrating an image display method according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram illustrating a correspondence relationship between a brightness reference value and a pulse width modulation duty ratio provided in an embodiment of the present application;
fig. 4 is a second schematic flowchart of an image display method according to an embodiment of the present application;
fig. 5 is a schematic diagram of a corresponding relationship between a pulse width modulation duty ratio and a gain provided in the embodiment of the present application;
FIG. 6 is a block diagram of an image display apparatus according to an embodiment of the present disclosure;
fig. 7 is a second schematic block diagram of an image display device according to an embodiment of the present application.
Icon: 100-an electronic device; 110-a memory; 120-a processor; 130-a communication unit; 200-an image display device; 210-an obtaining module; 220-a first calculation module; 230-a second calculation module; 240-duty cycle determination module; 250-an adjustment module; 260-a gain determination module; 270-an image processing module; 280-display module.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The inventor of the present application finds that, in the prior art, when backlight control is performed, the luminance of a frame image is calculated in the following manner. If the format of the frame image is YCbCr, wherein Y is a brightness (luma) component of color, and Cb and Cr are density offset components of blue and red, respectively, the brightness of the frame image is obtained by counting the value of Y of each pixel point. Or, the luminance of each pixel is calculated according to the luminance equation Y of 0.30R +0.59G +0.11B, and then the luminance of the frame image is calculated according to the luminance of each pixel. In the existing methods, the brightness of a frame image is calculated from the level of a pixel point, and various primary color components of each pixel point in the frame image are not counted, so that the actual brightness of the frame image cannot be accurately calculated, and further the expected backlight brightness of the frame image cannot be accurately calculated. Therefore, poor backlight brightness control effect and poor display effect can be caused.
The process of finding the defects of the above solutions is the result of the inventor after practice and careful study, therefore, the finding process of the above problems and the solution proposed by the following embodiments of the present application to the above problems should be the contribution of the inventor to the present application in the process of the present application.
Referring to fig. 1, fig. 1 is a block diagram of an electronic device 100 according to an embodiment of the present disclosure. The electronic device 100 may be, but is not limited to, a liquid crystal television, a smart phone, a Personal Computer (PC), a tablet computer, and the like. The electronic device 100 may include a memory 110, a processor 120, and a communication unit 130. The elements of the memory 110, the processor 120 and the communication unit 130 are electrically connected to each other directly or indirectly to realize data transmission or interaction. For example, the components may be electrically connected to each other via one or more communication buses or signal lines.
The memory 110 is used to store programs or data. The Memory 110 may be, but is not limited to, a Random Access Memory (RAM), a Read Only Memory (ROM), a Programmable Read-Only Memory (PROM), an erasable Read-Only Memory (EPROM), an electrically erasable Read-Only Memory (EEPROM), and the like.
The processor 120 is used to read/write data or programs stored in the memory 110 and perform corresponding functions. For example, the memory 110 stores therein the image display apparatus 200, and the image display apparatus 200 includes at least one software functional module that can be stored in the memory 110 in the form of software or firmware (firmware). The processor 120 executes various functional applications and data processing, i.e., implements the image display method in the embodiment of the present invention, by running software programs and modules stored in the memory 110, such as the image display apparatus 200 in the embodiment of the present invention.
The communication unit 130 is used for establishing a communication connection between the electronic apparatus 100 and another communication terminal via a network, and for transceiving data via the network.
It should be understood that the structure shown in fig. 1 is only a schematic structural diagram of the electronic device 100, and the electronic device 100 may also include more or fewer components than shown in fig. 1, or have a different configuration than shown in fig. 1. The components shown in fig. 1 may be implemented in hardware, software, or a combination thereof.
Referring to fig. 2, fig. 2 is a flowchart illustrating an image display method according to an embodiment of the present disclosure. The method may be applied to the electronic device 100. The following describes a specific flow of the image display method in detail.
Step S110, a current frame image to be displayed is acquired.
In this embodiment, the current frame image to be displayed may be obtained by receiving frame images transmitted by other devices. Since the three primary color components (i.e., R (red), G (green), and B (blue) components) of each pixel point in the current frame image need to be counted subsequently, after the current frame image is obtained, it is determined whether the format of the current frame image is the RGB format. That is, after obtaining the current frame image, it is first determined whether the color space of the current frame image is the RGB color space. If the current frame image is in the RGB format, step S120 may be performed.
If the format of the current frame image is not the RGB format, the current frame image is subjected to format conversion to obtain the current frame image in the RGB format, and then step S120 is performed. Optionally, the electronic device 100 may store various format conversion matrices in non-RGB format and RGB format in advance. When the format of the obtained current frame image is not the RGB format, a target format conversion matrix can be determined according to the format conversion matrix of the stored non-RGB format and the format of the current frame image, and then the format of the current frame image is converted into the RGB format according to the target format conversion matrix. The format conversion matrix may be a 3 × 3 matrix.
Step S120, determining a maximum value of the primary color component in the current frame image according to the primary color component of each pixel point in the current frame image, and calculating an average value of the primary color components in the current frame image.
In this embodiment, after obtaining the current frame image of RGB, according to the three-primary color components (i.e., R, G, B components) of each pixel point in the current frame image, the maximum value of all the three-primary color components in the current frame image can be found through a comparison method, that is, the maximum value of the three-primary color components is found. And calculating to obtain the average value of all the three primary color components in the current frame image according to the three primary color components of each pixel point in the current frame image, thus obtaining the average value of the primary color components. Wherein, the maximum value of the primary color component and the average value of the primary color component are both one. For example, a frame image includes n pixel points, a maximum value is determined from 3n components according to R, G, B components of each pixel point, and an average value is calculated according to 3n components. The maximum value is the maximum value of the primary color component in the frame image, and the average value is the average value of the primary color component in the frame image.
And step S130, carrying out weighted summation on the obtained maximum value of the primary color component and the average value of the primary color component to obtain a target brightness reference value.
In this embodiment, the electronic apparatus 100 may store preset weights corresponding to the maximum primary color component and the average primary color component in advance. After the primary color component maximum value and the primary color component average value in the current frame image are obtained, weighted summation operation can be performed according to the primary color component maximum value, the preset weight corresponding to the primary color component maximum value, the primary color component average value and the preset weight corresponding to the primary color component average value, so as to obtain a target brightness reference value. The preset weights corresponding to the maximum value of the primary color component and the average value of the primary color component can be set according to the requirements of an actual user. The target luminance reference value corresponds to the actual luminance of the current frame image. In calculating the target luminance reference value, the target luminance reference value may be calculated by the following formula: output ═ α ═ APL + (1- α) × MPL, where α represents a preset weight, and can be adjusted according to user requirements, the range of α is 0-1, APL represents the average value of primary color components, and MPL represents the maximum value of primary color components.
And step S140, obtaining a target pulse width modulation duty ratio according to the preset corresponding relation between the brightness reference value and the pulse width modulation duty ratio and the target brightness reference value.
And S150, adjusting the backlight brightness of the backlight module by adopting the target pulse width modulation duty ratio.
And step S180, displaying the current frame image.
In this embodiment, the electronic device 100 may further store a preset corresponding relationship between a brightness reference value and a Pulse Width Modulation (PWM) duty ratio. Each actual backlight brightness corresponds to a pulse width modulation duty ratio and to a brightness reference value. The correspondence of the brightness reference value to the pulse width modulation duty cycle can be obtained. After the target brightness reference value is obtained through calculation, the target pulse width modulation duty ratio corresponding to the target brightness reference value can be obtained according to the target brightness reference value and the corresponding relation between the stored brightness reference value and the pulse width modulation duty ratio. And then, the target pulse width modulation duty ratio can be sent to a backlight module, so that the backlight module controls the backlight brightness according to the target pulse width modulation duty ratio, and the backlight module displays the current frame image according to the backlight brightness corresponding to the target pulse width modulation duty ratio. Thereby, the backlight luminance is adjusted by the target backlight luminance corresponding to the target luminance reference value.
In this embodiment, a target luminance reference value is obtained by calculation according to the maximum value of the primary color components and the average value of the primary color components of all the three primary color components, and the difference between the frame image luminance corresponding to the target luminance reference value and the frame image actual luminance is smaller than the difference between the frame image luminance and the frame image actual luminance calculated in the prior art. Therefore, the backlight brightness after the duty ratio control according to the target pulse width modulation corresponding to the target brightness reference value is closer to the expected backlight brightness of the frame image, so that the backlight control effect is better, and the image display effect can be effectively improved.
The correspondence between the brightness reference value and the Pulse Width Modulation (PWM) duty ratio can be expressed by a table, an image, a formula, or the like, and the correspondence can be linear or non-linear and is set according to the actual requirements of the user. Referring to fig. 3, fig. 3 is a schematic diagram illustrating a correspondence relationship between a luminance reference value and a pulse width modulation duty ratio according to an embodiment of the present application. The corresponding relation is represented by a table and an image, wherein Reference represents a brightness reference value, and Bcaklight duty represents a pulse width modulation duty ratio of the backlight module. For example, if the target brightness reference value is 102, the corresponding target pwm duty ratio is 60% according to fig. 3.
According to the embodiment of the application, the target reference brightness value is obtained through calculation according to the maximum value and the average value of all three primary color components in the current frame image, and then the backlight brightness is adjusted according to the target reference brightness value. By the method, the backlight brightness can be accurately controlled, and the difference between the adjusted backlight brightness and the backlight brightness expected to be achieved by the current frame image is reduced as much as possible, so that the problems of poor backlight control effect and poor display effect caused by large deviation between the calculated brightness and the actual brightness of the frame image are effectively solved. In the control mode, because the difference between the adjusted backlight brightness and the backlight brightness expected to be reached by the current frame image is small, even if the backlight brightness is reduced, more dark scene details can be retained, and many details in the dark scene are not lost due to the fact that the difference between the adjusted brightness and the backlight brightness expected to be reached by the current frame image is large. Therefore, the backlight brightness of the frame images of various colors can be accurately controlled by the method. Wherein the lifting precision is about 3 times. This approach may also achieve power savings by reducing backlight brightness.
For example, if R, G, B components of all pixels in a frame of image are: 0,0, 255. According to the luminance equation: y is 0.30R +0.59G +0.11B, and the luminance is calculated to be 28.05 as 0.30 × 0+0.59 × 0+0.11 × 255. It can be seen that the actual brightness of the frame image is very bright because it is only blue, whereas the brightness calculated by the brightness equation is 28.05, which is much smaller than the actual brightness of the frame image. If the target pulse width modulation duty ratio is determined according to the brightness calculated in the manner, and then the backlight brightness is adjusted, the control effect of the backlight brightness is inevitably poor, and further the display effect of the frame image is poor. In the embodiment of the application, the target reference brightness value is obtained by calculating according to the maximum value of the primary color component and the average value of the primary color component in the frame image, and the target reference brightness value corresponds to the actual brightness of the frame image, so that the backlight brightness is controlled according to the target reference brightness value, and the situation can be effectively relieved.
Alternatively, in this embodiment, the target pulse width modulation duty ratio may be obtained as follows. Firstly, according to the preset corresponding relation between the brightness reference value and the pulse width modulation duty ratio and the target brightness reference value, obtaining the initial target pulse width modulation duty ratio corresponding to the target brightness reference value. And judging whether the initial target pulse width modulation duty ratio needs to be adjusted or not according to the target pulse width modulation duty ratio corresponding to at least one frame of historical frame image before the current frame image. And if so, increasing or decreasing the initial target pulse width modulation duty ratio according to the target pulse width modulation duty ratio corresponding to the at least one frame of historical frame image to obtain the target pulse width modulation duty ratio. And if not, taking the initial target pulse width modulation duty ratio as the target pulse width modulation duty ratio. Therefore, a temporal filter (temporal filter) is equivalently set, so that temporal change tends to be smoother, and picture flicker caused by abrupt change is avoided.
Optionally, an initial target pulse width modulation duty ratio corresponding to the target brightness reference value is obtained through calculation or search according to a corresponding relationship between the target brightness reference value, a preset brightness reference value and the pulse width modulation duty ratio. And then judging whether the initial target pulse width modulation duty ratio needs to be adjusted according to at least one frame of historical frame image before the current frame image. Optionally, the determination method may be: firstly, obtaining a target pulse width modulation duty ratio of a previous frame image of a current frame image from stored data, and calculating a difference value between the target pulse width modulation duty ratio of the previous frame image and an initial target pulse width modulation duty ratio of the current frame image; then comparing the difference value with a preset difference value range; if the difference is within the preset difference range, the initial target pulse width modulation duty ratio is judged not to be needed, and the initial target pulse width modulation duty ratio can be directly used as the target pulse width modulation duty ratio. If the difference is not within the preset difference range, it indicates that the difference between the initial target pulse width modulation duty ratio of the current frame image and the target pulse width modulation duty ratio of the previous frame image is large, and if the backlight brightness is directly adjusted according to the initial target pulse width modulation duty ratio, the image flicker may be caused. At this time, it is determined that the initial target pwm duty ratio needs to be adjusted. The specific adjustment mode can be as follows: and increasing or decreasing the initial target pulse width modulation duty ratio according to the target pulse width modulation duty ratio of the previous frame image so as to reduce the difference between the target pulse width modulation duty ratio and the target pulse width modulation duty ratio of the previous frame image, and taking the increased or decreased initial target pulse width modulation duty ratio as the target pulse width modulation duty ratio.
Optionally, the determining manner may also be: obtaining respective target pulse width modulation duty ratios of multiple frames of historical frame images before the current frame image from the stored data, then setting a preset duty ratio range according to the multiple target pulse width modulation duty ratios, and then judging whether to adjust the initial target pulse width modulation duty ratio according to whether the initial target pulse width modulation duty ratio is in the preset duty ratio range. And if the target pulse width modulation duty ratio is not in the preset duty ratio range, increasing or decreasing the initial target pulse width modulation duty ratio according to the preset duty ratio range so as to enable the target pulse width modulation duty ratio obtained after processing to be in the preset duty ratio range. If the duty ratio is within the preset duty ratio range, no adjustment is performed. Wherein, the frame images in the multiple frames of historical frame images can be continuous frame images. Further, the plurality of frames of historical frame images may further include a previous frame image of the current frame image. It should be understood that the above is only an example, and other ways to determine whether to adjust the initial target pwm duty ratio and the specific adjustment manner when the adjustment is needed may be adopted, as long as it is ensured that the picture does not flicker.
Referring to fig. 4, fig. 4 is a second schematic flow chart of an image display method according to an embodiment of the present application. Before step S180, the method may further include step S160 and step S170.
And step S160, obtaining the target gain according to the preset corresponding relation between the pulse width modulation duty ratio and the gain and the target pulse width modulation duty ratio.
Step S170, processing the current frame image according to the target gain to obtain a processed current frame image.
In this embodiment, the electronic device 100 may further store a preset correspondence between the pulse width modulation duty ratio and the gain. After the target pulse width modulation duty ratio is obtained, the target gain corresponding to the target pulse width modulation duty ratio can be obtained according to the target pulse width modulation duty ratio, the pulse width modulation duty ratio and the gain corresponding relation. And then processing the current frame image according to the target gain to obtain a gain-processed current frame image, and finally displaying the processed current frame image. Therefore, the brightness of the current frame image can be improved in a data compensation mode, the brightness loss after the backlight brightness is reduced is solved, the contrast of the current frame image is increased, and the detail and the layering of a dark field are improved.
The correspondence between the pulse width modulation duty ratio and the gain can be expressed by a table, an image, a formula and the like, and the correspondence can be linear or nonlinear and is set according to the setting requirement of a user. Referring to fig. 5, fig. 5 is a schematic diagram illustrating a correspondence relationship between a pulse width modulation duty ratio and a gain according to an embodiment of the present application. The corresponding relationship is represented by a table and an image, wherein Compensation gain represents the gain, and Bcakelight duty represents the pulse width modulation duty ratio of the backlight module. For example, if the target pwm duty ratio obtained in step S140 is 50%, the corresponding target gain is 1.5 according to fig. 5.
In the above embodiment, the target pulse width modulation duty ratio determined according to the maximum value of the primary color component and the average value of the primary color component of the current frame image may be sent to the backlight module of the panel (panel) to adjust the backlight brightness according to the maximum value of the primary color component and the average value of the primary color component. The current frame image processed according to the target gain may also be transmitted to the Panel T-con. And finally, displaying the current frame image processed according to the target gain under the target backlight brightness corresponding to the maximum value of the primary color component and the average value of the primary color component.
According to the embodiment of the application, energy conservation can be realized by reducing the backlight brightness, dynamic contrast and image quality can be improved, and light leakage and mura of a dark field of the panel are reduced. Wherein mura refers to the phenomenon that the brightness of the display is not uniform, which causes various marks. Meanwhile, the target pulse width modulation duty ratio is determined according to the maximum value of the primary color component and the average value of the primary color component of the frame image, and the backlight brightness determined by the method is closer to the expected backlight brightness of the frame image, so that the accurate control of the backlight brightness of pictures with various colors can be realized, and the accuracy is improved by about 3 times. In the process, the current frame image is processed according to the target gain, so that the detail and the layering of the dark field are improved. When the target pulse width modulation duty ratio corresponding to the target pulse width modulation duty ratio is determined, the initial target pulse width modulation duty ratio directly obtained based on the corresponding relation between the brightness reference value and the pulse width modulation duty ratio can be adjusted in an increasing or decreasing adjusting mode, and therefore image flicker is avoided.
In order to execute the corresponding steps in the above embodiments and various possible manners, an implementation manner of the image display apparatus 200 is given below, and optionally, the image display apparatus 200 may adopt the device structure of the electronic device 100 shown in fig. 1. Further, referring to fig. 6, fig. 6 is a block diagram of an image display device 200 according to an embodiment of the present disclosure. It should be noted that the basic principle and the technical effects of the image display apparatus 200 provided in the present embodiment are the same as those of the above embodiments, and for the sake of brief description, no part of the present embodiment is mentioned, and corresponding contents in the above embodiments may be referred to. The image display device 200 may include: the device comprises an acquisition module 210, a first calculation module 220, a second calculation module 230, a duty ratio determination module 240, an adjustment module 250, and a display module 280.
The obtaining module 210 is configured to obtain a current frame image to be displayed.
The first calculating module 220 is configured to determine a maximum value of primary color components in the current frame image according to the three primary color components of each pixel point in the current frame image, and calculate an average value of the primary color components in the current frame image.
The second calculating module 230 is configured to perform weighted summation on the obtained maximum primary color component and the obtained average primary color component to obtain a target brightness reference value.
The duty ratio determining module 240 is configured to obtain a target pulse width modulation duty ratio according to a preset correspondence between the brightness reference value and the pulse width modulation duty ratio and the target brightness reference value.
Optionally, in this embodiment of the present application, the duty ratio determining module 240 is specifically configured to:
obtaining an initial target pulse width modulation duty ratio corresponding to the target brightness reference value according to a preset corresponding relation between the brightness reference value and the pulse width modulation duty ratio and the target brightness reference value;
judging whether the initial target pulse width modulation duty ratio needs to be adjusted or not according to the target pulse width modulation duty ratio corresponding to at least one frame of historical frame image before the current frame image;
if so, increasing or decreasing the initial target pulse width modulation duty ratio according to the target pulse width modulation duty ratio corresponding to the at least one frame of historical frame image to obtain the target pulse width modulation duty ratio;
and if not, taking the initial target pulse width modulation duty ratio as the target pulse width modulation duty ratio.
The adjusting module 250 is configured to adjust the backlight brightness of the backlight module by using the target pulse width modulation duty ratio.
The display module 280 is configured to display the current frame image.
Optionally, in this embodiment of the present application, the obtaining module 210 is further configured to:
judging whether the format of the current frame image is an RGB format;
if not, the current frame image is subjected to format conversion to obtain the current frame image in the RGB format.
Referring to fig. 7, fig. 7 is a second block diagram of an image display device 200 according to an embodiment of the present disclosure. The image display apparatus 200 may further include a gain determination module 260 and an image processing module 270.
A gain determining module 260, configured to obtain a target gain according to a preset correspondence between a pulse width modulation duty ratio and a gain and the target pulse width modulation duty ratio;
and an image processing module 270, configured to process the current frame image according to the target gain, so as to obtain a processed current frame image.
The display module 280 is specifically configured to display the processed current frame image.
Alternatively, the modules may be stored in the memory 110 shown in fig. 1 in the form of software or Firmware (Firmware) or be fixed in an Operating System (OS) of the electronic device 100, and may be executed by the processor 120 in fig. 1. Meanwhile, data, codes of programs, and the like required to execute the above-described modules may be stored in the memory 110.
An embodiment of the present application further provides a readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the image display method.
In summary, the present application provides an image display method, an image display apparatus, an electronic device, and a readable storage medium. After obtaining the current frame image to be displayed, obtaining the maximum value of the primary color component and the average value of the primary color component in the current frame image according to the three primary color components of each pixel point in the current frame image. And then carrying out weighted summation operation on the maximum value of the primary color component and the average value of the primary color component to obtain a target brightness reference value. And then obtaining a target pulse width modulation duty ratio corresponding to the target brightness reference value based on the preset corresponding relation between the brightness reference value and the pulse width modulation duty ratio. And finally, adjusting the backlight brightness of the backlight module by adopting the target pulse width modulation duty ratio, and displaying the current frame image. Therefore, the three primary color components of each pixel point in the current frame image are counted firstly, then the target brightness reference value corresponding to the actual brightness of the current frame image is calculated according to the maximum value of the primary color components and the average value of the primary color components, and finally the backlight brightness is controlled according to the target brightness reference value, so that the difference between the adjusted backlight brightness and the expected backlight brightness of the current frame image is very small, and the problems of poor backlight control effect and poor display effect caused by large deviation between the calculated brightness and the actual brightness of the frame image are effectively solved.
Further, a target gain can be determined according to the target pulse width modulation duty ratio, then the current frame image is processed according to the target gain, and the processed current frame image is displayed. Therefore, the brightness of the current frame image can be improved in a data compensation mode, the brightness loss after the backlight brightness is reduced is solved, and the detail and the layering sense of a dark field can be improved.
Further, the initial target pulse width modulation duty ratio obtained by the correspondence between the brightness reference value and the pulse width modulation duty ratio can be adjusted according to the target pulse width modulation duty ratio corresponding to at least one frame of historical frame image before the current frame image, and the backlight brightness can be controlled according to the obtained target pulse width modulation duty ratio to avoid the flicker of the picture.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. An image display method, characterized in that the method comprises:
acquiring a current frame image to be displayed;
determining the maximum value of the primary color component in the current frame image according to the primary color component of each pixel point in the current frame image, and calculating the average value of the primary color components in the current frame image;
carrying out weighted summation on the obtained maximum value of the primary color components and the average value of the primary color components to obtain a target brightness reference value;
obtaining a target pulse width modulation duty ratio according to a preset corresponding relation between a brightness reference value and a pulse width modulation duty ratio and the target brightness reference value;
and adjusting the backlight brightness of a backlight module by adopting the target pulse width modulation duty ratio, and displaying the current frame image.
2. The method of claim 1, wherein prior to said displaying said current frame image, said method further comprises:
obtaining a target gain according to a preset corresponding relation between a pulse width modulation duty ratio and a gain and the target pulse width modulation duty ratio;
and processing the current frame image according to the target gain to obtain a processed current frame image.
3. The method according to claim 1 or 2, wherein obtaining the target pwm duty ratio according to the preset correspondence between the brightness reference value and the pwm duty ratio and the target brightness reference value comprises:
obtaining an initial target pulse width modulation duty ratio corresponding to the target brightness reference value according to a preset corresponding relation between the brightness reference value and the pulse width modulation duty ratio and the target brightness reference value;
judging whether the initial target pulse width modulation duty ratio needs to be adjusted or not according to the target pulse width modulation duty ratio corresponding to at least one frame of historical frame image before the current frame image;
if so, increasing or decreasing the initial target pulse width modulation duty ratio according to the target pulse width modulation duty ratio corresponding to the at least one frame of historical frame image to obtain the target pulse width modulation duty ratio;
and if not, taking the initial target pulse width modulation duty ratio as the target pulse width modulation duty ratio.
4. The method of claim 1, wherein after said obtaining the current frame image to be displayed, the method further comprises:
judging whether the format of the current frame image is an RGB format;
if not, the current frame image is subjected to format conversion to obtain the current frame image in the RGB format.
5. An image display apparatus, characterized in that the apparatus comprises:
the acquisition module is used for acquiring a current frame image to be displayed;
the first calculation module is used for determining the maximum value of the primary color component in the current frame image according to the primary color component of each pixel point in the current frame image and calculating the average value of the primary color components in the current frame image;
the second calculation module is used for carrying out weighted summation on the obtained primary color component maximum value and the obtained primary color component average value to obtain a target brightness reference value;
the duty ratio determining module is used for obtaining a target pulse width modulation duty ratio according to the preset corresponding relation between the brightness reference value and the pulse width modulation duty ratio and the target brightness reference value;
the adjusting module is used for adjusting the backlight brightness of the backlight module by adopting the target pulse width modulation duty ratio;
and the display module is used for displaying the current frame image.
6. The apparatus of claim 5, further comprising:
the gain determining module is used for obtaining a target gain according to a preset corresponding relation between the pulse width modulation duty ratio and the gain and the target pulse width modulation duty ratio;
and the image processing module is used for processing the current frame image according to the target gain to obtain a processed current frame image.
7. The apparatus of claim 5 or 6, wherein the duty cycle determination module is specifically configured to:
obtaining an initial target pulse width modulation duty ratio corresponding to the target brightness reference value according to a preset corresponding relation between the brightness reference value and the pulse width modulation duty ratio and the target brightness reference value;
judging whether the initial target pulse width modulation duty ratio needs to be adjusted or not according to the target pulse width modulation duty ratio corresponding to at least one frame of historical frame image before the current frame image;
if so, increasing or decreasing the initial target pulse width modulation duty ratio according to the target pulse width modulation duty ratio corresponding to the at least one frame of historical frame image to obtain the target pulse width modulation duty ratio;
and if not, taking the initial target pulse width modulation duty ratio as the target pulse width modulation duty ratio.
8. The apparatus of claim 5, wherein the obtaining module is further configured to:
judging whether the format of the current frame image is an RGB format;
if not, the current frame image is subjected to format conversion to obtain the current frame image in the RGB format.
9. An electronic device comprising a processor and a memory, the memory storing machine executable instructions executable by the processor to implement the image display method of any one of claims 1 to 4.
10. A readable storage medium on which a computer program is stored, which computer program, when being executed by a processor, carries out the image display method according to any one of claims 1 to 4.
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