CN114639355A - Image display method and device, storage medium and terminal - Google Patents
Image display method and device, storage medium and terminal Download PDFInfo
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- CN114639355A CN114639355A CN202210180905.6A CN202210180905A CN114639355A CN 114639355 A CN114639355 A CN 114639355A CN 202210180905 A CN202210180905 A CN 202210180905A CN 114639355 A CN114639355 A CN 114639355A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0247—Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
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Abstract
An image display method and device, a storage medium and a terminal are provided, and the method comprises the following steps: acquiring first switching information, wherein the first switching information is used for indicating that the current state of the CABC function is switched to a first target state; entering a first gradual change state if the current state is a first mode state and the first target state is a second mode state different from the first mode state; under the first gradual change state, calculating a first display parameter and a second display parameter of each frame of image based on weight to obtain the display parameter of the frame of image; controlling the display of each frame of image according to the display parameters of the frame of image; in the first gradual change state, when the display parameters of each frame of image are calculated, the weight of the first display parameter is gradually reduced, and the weight of the second display parameter is gradually increased. By the scheme provided by the invention, the image flicker in the CABC process can be reduced.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to an image display method and apparatus, a storage medium, and a terminal.
Background
Content Adaptive Brightness Control (CABC) functionality is typically used to reduce backlight power consumption when an electronic device is displaying. Specifically, the backlight brightness and the image brightness are adjusted according to the image content, so that the purpose of reducing the backlight power consumption is achieved. At present, the problem of picture flicker still exists in the CABC function operation process.
Therefore, an image display method is needed to reduce the flicker of the image during the operation of the CABC function and improve the display effect.
Disclosure of Invention
The invention solves the technical problem of how to reduce the situation of picture flicker in the CABC function operation process and improve the display effect.
To solve the above technical problem, an embodiment of the present invention provides an image display method, where the method includes: acquiring first switching information, wherein the first switching information is used for indicating that a current state of a CABC function is switched to a first target state, and the state of the CABC function comprises: the CABC algorithm comprises a plurality of mode states and at least one gradual change state, wherein the different mode states correspond to different CABC algorithm configuration parameters; entering a first gradual change state if the current state is a first mode state and the first target state is a second mode state different from the first mode state; in the first gradual change state, performing weight-based calculation on a first display parameter and a second display parameter of each frame of image to obtain a display parameter of the frame of image, wherein the first display parameter is calculated according to a CABC algorithm and a configuration parameter corresponding to the first mode state, and the second display parameter is calculated according to the CABC algorithm and a configuration parameter corresponding to the second mode state; controlling the display of each frame of image according to the display parameters of the frame of image; in the first gradual change state, when the display parameters of each frame of image are calculated, the weight of the first display parameter is gradually reduced, and the weight of the second display parameter is gradually increased.
Optionally, when the duration in the first gradual change state reaches a preset duration or the number of images displayed in the first gradual change state reaches a preset threshold, the second mode state is entered.
Optionally, the method further includes: if second switching information is acquired in the first gradual change state and a second target state indicated by the second switching information is the same as the first mode state, keeping the first gradual change state; entering a second gradual change state when the end condition of the first gradual change state is met; under the second gradual change state, calculating the first display parameter and the second display parameter of each frame of image based on weight to obtain the display parameter of the frame of image; in the second gradual change state, when the display parameters of each frame of image are calculated, the weight of the first display parameter is gradually increased, and the weight of the second display parameter is gradually decreased; wherein the end condition of the first fade state comprises: the time length in the first gradual change state reaches a preset time length or the number of the images displayed in the first gradual change state reaches a preset threshold value.
Optionally, the method further includes: if the second target state is the same as the second mode state, the first gradual change state is kept, and when the end condition of the first gradual change state is met, the second mode state is entered.
Optionally, the method further includes: if the second target state is a third mode state which is different from the first mode state and the second mode state, keeping the second target state in the first gradual change state, and entering a third gradual change state when the end condition of the first gradual change state is met; in the third gradual change state, performing weight-based calculation on a second display parameter and a third display parameter of each frame of image to obtain the display parameter of the frame of image, wherein the third display parameter is calculated according to a CABC algorithm and a configuration parameter corresponding to the third mode state; in the third gradual change state, when the display parameter of each frame image is calculated, the weight of the second display parameter is gradually reduced, and the weight of the third display parameter is gradually increased.
Optionally, the method further includes: monitoring an enabling signal of a related function, wherein the related function is a function needing to adjust backlight except a CABC function; entering a fade-out state if the enable signal of any associated function indicates that the associated function is opened and the priority of the opened associated function is greater than that of CABC; under the fade-out state, performing weight-based calculation on the historical display parameters and default display parameters of each frame of image to obtain the display parameters of the frame of image; in the fade-out state, when the display parameters of each frame image are calculated, the weight of the historical display parameters is gradually reduced, and the weight of the default display parameters is gradually increased.
Optionally, before the first switching information is acquired, the method further includes: acquiring a CABC opening signal; entering a fade-in state in response to the CABC on signal; in the gradual-in state, calculating the default display parameters and the historical display parameters of each frame of image based on weight to obtain the display parameters of the frame of image; in the progressive state, when the display parameters of each frame image are calculated, the weight of the default display parameters is gradually reduced, and the weight of the historical display parameters is gradually increased.
Optionally, before controlling the display of each frame of image according to the display parameter of the frame of image, the method further includes: calculating a difference between actual display parameters of a previous frame image and display parameters of the current frame image; determining a filter coefficient according to the difference, wherein the larger the difference is, the larger the filter coefficient is; calculating the display parameters of the current frame image and the actual display parameters of the previous frame image based on weight to obtain the actual display parameters of the current frame image; the sum of the weight of the actual display parameter of the previous frame image and the weight of the display parameter of the current frame image is 1, and the filter coefficient is the weight of the actual display parameter of the previous frame image.
Optionally, the display parameters include: the first pixel compensation coefficient is used for performing backlight compensation on pixel points in a first brightness area in the image; the second pixel compensation coefficient is used for performing backlight compensation on pixel points in a second brightness area in the image; the third pixel compensation coefficient is used for performing backlight compensation on pixel points in a third brightness area in the image; the first brightness area is a pixel area with a pixel value smaller than or equal to a first preset threshold, the third brightness area is a pixel area with a pixel value larger than or equal to a second preset threshold, the second brightness area is a pixel area with a pixel value larger than the first preset threshold and smaller than the second preset threshold, and the second preset threshold is larger than the first preset threshold; the second pixel compensation coefficient is larger than the first pixel compensation coefficient and the third pixel compensation coefficient.
In order to solve the above technical features, an embodiment of the present invention further provides an image display device, including: an obtaining module, configured to obtain first switching information, where the first switching information is used to indicate that a current state of a CABC function is switched to a first target state, and the state of the CABC function includes: the CABC algorithm comprises a plurality of mode states and at least one gradual change state, wherein the different mode states correspond to different CABC algorithm configuration parameters; the switching module is used for entering a first gradual change state if the current state is a first mode state and the first target state is a second mode state different from the first mode state; the first gradual change module is used for performing weight-based calculation on a first display parameter and a second display parameter of each frame of image in the first gradual change state to obtain the display parameter of the frame of image, wherein the first display parameter is calculated according to a CABC algorithm and a configuration parameter corresponding to the first mode state, and the second display parameter is calculated according to the CABC algorithm and a configuration parameter corresponding to the second mode state; the display module is used for controlling the display of each frame of image according to the display parameters of each frame of image; in the first gradual change state, when the display parameters of each frame of image are calculated, the weight of the first display parameter is gradually reduced, and the weight of the second display parameter is gradually increased.
Embodiments of the present invention further provide a storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the image display method are executed.
The embodiment of the present invention further provides a terminal, which includes a memory and a processor, where the memory stores a computer program that can be run on the processor, and the processor executes the steps of the image display method when running the computer program.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
in the scheme of the embodiment of the invention, the first switching information is acquired, and if the CABC function is currently in the first mode state and the first target state indicated by the first switching information is the second mode state, the first gradual change state is entered. In the first gradual change state, the display parameter of each frame image is obtained by calculating the first display parameter and the second display parameter of the frame image based on weight. In the first gradual change state, when the display parameters of each frame of image are calculated, the weight of the first display parameter is gradually reduced, and the weight of the second display parameter is gradually increased, so that the CABC function can be gently adjusted from the first mode state to the second mode state through the first gradual change state, the condition of picture flicker during mode state switching can be reduced, and the display effect is favorably improved.
Further, in the scheme of this embodiment, by monitoring the enable signal of the associated function, mutual exclusion between a plurality of functions requiring backlight adjustment is achieved, which is beneficial to reducing system expenses and improving the stability of system operation.
Further, in the scheme of this embodiment, the start-up of the CABC function sets the fade-in state and/or sets the fade-out state when the CABC function is turned off, which is beneficial to reducing the situation of image flicker occurring in the CABC function switching process.
Further, in the solution of this embodiment, the second pixel compensation coefficient is greater than the first pixel compensation coefficient and the third pixel compensation coefficient. By adopting the scheme, on one hand, the overall brightness of the image can be improved as much as possible by increasing the pixel compensation coefficient of the middle brightness area, and the backlight power consumption is favorably reduced as much as possible; on the other hand, compared with a scheme in which the low-luminance region and the medium-luminance region employ the same pixel compensation coefficient, the scheme in this embodiment can keep the luminance of the pixels in the low-luminance region from being increased too much, ensure that the change in the number of the pixel points belonging to the low-luminance region is small in the images before and after compensation, ensure that the change in the contrast of the images before and after compensation is small, and is beneficial to improving the display effect of the images.
Further, in the scheme of this embodiment, a difference between the actual display parameters of the previous frame image and the display parameters of the current frame image is calculated; and determining a filter coefficient according to the difference, and performing weight-based calculation on the display parameter of the current frame image and the actual display parameter of the previous frame image to obtain the actual display parameter of the current frame image. When the scheme is adopted, the larger the difference is, the larger the determined filter coefficient is, and the closer the actual display parameter of the current frame image is to the actual display parameter of the previous frame image, so that the situation of flicker caused by sudden change of the brightness of the picture can be further reduced.
Drawings
FIG. 1 is a flowchart illustrating an image display method according to an embodiment of the present invention;
FIG. 2 is a diagram illustrating state transitions of a CABC function according to an embodiment of the present invention;
FIG. 3 is a partial flow chart of another image display method according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an image display device according to an embodiment of the present invention.
Detailed Description
As described in the background art, there is a need for an image display method that can reduce the flicker of the picture during the operation of the CABC function and improve the display effect.
In the prior art, the CABC function generally has multiple modes, and a user can select a corresponding mode according to actual conditions. For example, the CABC function has: a power saving mode, an intermediate mode, and a display mode. In the power saving mode, the backlight power consumption needs to be reduced as much as possible, and in the display mode, the picture quality needs to be improved as much as possible; in the intermediate mode, both backlight power consumption and picture quality need to be taken into account. When the scheme is adopted, in the CABC function operation process, if the CABC mode is switched, the situation of picture flicker is easy to occur, and the user experience is poor.
In order to solve the foregoing technical problem, an embodiment of the present invention provides an image display method, in an aspect of the embodiment of the present invention, first switching information is obtained, and if a CABC function is currently in a first mode state and a first target state indicated by the first switching information is a second mode state, a first gradual change state is entered. In the first gradual change state, the display parameter of each frame image is obtained by calculating the first display parameter and the second display parameter of the frame image based on the weight. In the first gradual change state, when the display parameters of each frame of image are calculated, the weight of the first display parameter is gradually reduced, and the weight of the second display parameter is gradually increased, so that the CABC function can be gently adjusted from the first mode state to the second mode state through the first gradual change state, the condition of picture flicker during mode state switching can be reduced, and the display effect is favorably improved.
The scheme in this embodiment may be executed by a terminal, and the terminal may be an existing terminal with various display functions, for example, but not limited to, a mobile phone, a computer, a tablet computer, and an internet of things device. More specifically, the terminal is configured with a Content Adaptive Brightness Control (CABC) function that can adjust backlight Brightness and image pixels according to image Content to reduce backlight power consumption.
In the solution of this embodiment, the CABC function has a plurality of states, and the plurality of states may include: a plurality of mode states; and the CABC algorithm corresponding to different mode states has different configuration parameters. Specifically, in each mode state, the CABC algorithm executed by the CABC function is the same, but the configuration parameters of the CABC algorithm are different. In other words, for the same image, the CABC algorithm used is the same in different modes, but the configuration parameters are different, so the display parameters of the image calculated are also different.
The display parameters of the image may include: backlight parameters and pixel parameters. The backlight parameter may be backlight brightness when the image is displayed, and the pixel parameter may be a pixel value of the image or a pixel compensation coefficient when the image is displayed, where the pixel compensation coefficient is a coefficient for performing backlight compensation on the pixel value of the image.
In the same mode, the configuration parameters are always kept unchanged, but the display parameters of the image are changed. More specifically, in the same mode state, the display parameters are changed along with the change of the image, but the configuration parameters for calculating the display parameters are kept unchanged, that is, the configuration parameters corresponding to the mode state are not changed along with the change of the image.
Further, in the solution of this embodiment, when the CABC function is switched from one mode state to another mode state, the transition state needs to be passed first, so that when the mode state of the CABC function is switched, the situation of image flicker can be effectively avoided, and the display effect is improved.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Referring to fig. 1, fig. 1 is a flowchart illustrating an image display method according to an embodiment of the present invention, and fig. 2 is a diagram illustrating state transition of a CABC function according to an embodiment of the present invention. It should be noted that fig. 2 only exemplarily shows three mode states, that is, the first mode state, the second mode state, and the third mode state, but is not limited thereto. It should be noted that fig. 2 only shows the case of transition between various states by way of example, but is not limited thereto. The following non-restrictive description of the image display method in the present embodiment is made with reference to fig. 1 and 2.
The image display method shown in fig. 1 may include the steps of:
step S101: acquiring first switching information, wherein the first switching information is used for indicating that the current state of the CABC function is switched to a first target state;
step S102: entering a first gradual change state if the current state is a first mode state and the first target state is a second mode state different from the first mode state;
step S103: under the first gradual change state, calculating a first display parameter and a second display parameter of each frame of image based on weight to obtain the display parameter of the frame of image;
step S104: controlling the display of each frame of image according to the display parameters of the frame of image;
in the gradual change state, the display screen gradually changes, and is usually realized by displaying a plurality of frames of images frame by frame. In the scheme of the embodiment, the display parameters of the multi-frame images are gradually changed, so that the gradual change effect of the display picture can be realized. And in the first gradual change state, when the display parameters of each frame of image are calculated, the weight of the first display parameter is gradually reduced, and the weight of the second display parameter is gradually increased.
It is understood that, in a specific implementation, the method may be implemented by a software program running in a processor integrated inside a chip or a chip module; alternatively, the method can be implemented in hardware or a combination of hardware and software.
In a specific implementation of step S101, first switching information may be acquired, where the first switching information may be input by a user of the terminal, and the first switching information may be used to instruct switching of the current state of the cabac function to the first target state. Specifically, the first switching information may include: identification of a first target state. More specifically, the target states in the present embodiment are all mode states.
In a specific implementation of step S102, the current state of the CABC function and the first target state may be compared, and if the current state is the first mode state and the first target state is the second mode state different from the first mode state, the first transition state may be entered. In other words, if the current state is the first mode state and the first target state is the second mode state different from the first mode state, the CABC function is triggered to transition from the first mode state into the first gradual change state.
Further, if the current state is the first mode state and the first target state is also the first mode state, the first mode state is maintained. Specifically, the display parameter of each frame image is continuously calculated by using the arrangement parameter corresponding to the first mode state.
In a specific implementation of step S103, in the first gradual change state, for each frame of image, a first display parameter of the frame of image may be calculated according to the CABC algorithm and the configuration parameter corresponding to the first mode state, and a second display parameter of the frame of image may be calculated according to the CABC algorithm and the configuration parameter corresponding to the second mode state.
Further, for each frame of image, the first display parameter and the second display parameter of the frame of image may be calculated based on weight to obtain the display parameter of the frame of image. More specifically, the first display parameter and the second display parameter may be weighted and summed to obtain the display parameter.
Further, in the first gradation state, the weight of the first display parameter is gradually decreased, and the weight of the second display parameter is gradually increased. Specifically, the weight of the first display parameter gradually decreases and the weight of the second display parameter gradually increases as time passes, and the first gradation state is ended when the ending condition of the first gradation state is satisfied.
In a specific example, in the first gradation state, the sum of the weight of the first display parameter and the weight of the second display parameter is always 1. More specifically, the weight of the first display parameter of the first frame image in the first fade state may be 1, the weight of the first display parameter of the last frame image may be 0, and a difference between the weight of the first display parameter of each frame image and the weight of the first display parameter of the previous frame image from the second frame image may be a preset first step value, where the first step value is smaller than 0.
Further, the end condition of the first fade state may include: the duration in the first gradual change state reaches a preset duration, or the number of images displayed in the first gradual change state reaches a preset threshold. For example, the preset time period of 0.4s, that is, when the time period in the first fade state reaches 0.4s, it is determined that the end condition of the first fade state is satisfied. For another example, the preset threshold may be 20, that is, when the image displayed in the first fade state reaches 20 frames, it is determined that the end condition of the first fade state is satisfied. When the end condition of the first gradual change state is met, the second mode state can be entered and maintained in the second mode state until new switching information is acquired in the second mode state. And in the second mode state, calculating the display parameters of each frame of image by adopting a CABC algorithm and the configuration parameters corresponding to the second mode state.
Further, although the duration of the fade state is short, in consideration that there is still a possibility that the switching information may be acquired in the fade state, in the solution of this embodiment, if the second switching information is acquired in the first fade state, the second target state indicated by the second switching information may be compared with the first mode state and the second mode state, and the next state entered after the first fade state is ended may be determined according to the comparison result. The second switching information may include an identifier of a second target state, and the second target state may also be a mode state.
In the first aspect, if the second target state is the same as the first mode state, that is, the second switching information includes the identifier of the first mode state, the image display may be continued in the first fade state, and the second fade state is entered when the end condition of the first fade state is satisfied. It should be noted that the first gradual state is maintained, that is, the counting of the image or the timing of the time length is continued, that is, the first gradual state is not re-entered.
Further, in the second gradual change state, the display parameter of each frame image is calculated based on the first display parameter and the second display parameter of the frame image. In the second gradual change state, when the display parameters of each frame of image are calculated, the weight of the first display parameter is gradually increased, and the weight of the second display parameter is gradually decreased. Specifically, the weight of the first display parameter gradually increases and the weight of the second display parameter gradually decreases as time passes, and the second gradation state is ended when the ending condition of the second gradation state is satisfied. The ending condition of the second gradual change state and the ending condition of the first gradual change state may be the same or different.
In a specific example, in the second gradation state, the sum of the weight of the first display parameter and the weight of the second display parameter is always 1. More specifically, the weight of the first display parameter of the first frame image in the second gradation state may be 0, the weight of the first display parameter of the last frame image may be 1, and a difference between the weight of the first display parameter of each frame image and the weight of the first display parameter of the previous frame image from the second frame image may be a preset second step value, which is greater than 0. Wherein, the first step value and the second step value can be opposite numbers.
Further details regarding the second fade state can be found in the above description regarding the first fade state, and are not repeated herein.
In a second aspect, if the second target state is the same as the second mode state, that is, the second switching information includes the identifier of the second mode state, the second target state may be maintained in the first transition state, and the second mode state may be entered when the end condition of the first transition state is satisfied.
In a third aspect, if the second target state is a third mode state different from the first mode state and the second mode state, the first gradation state is maintained. When the end condition of the first fade state is met, a third fade state may be entered.
Further, in the third transition state, for each frame of image, the second display parameter of the frame of image may be calculated according to the CABC algorithm and the configuration parameter corresponding to the second mode state, and the third display parameter of the frame of image may be calculated according to the CABC algorithm and the configuration parameter corresponding to the third mode state. Further, for each frame of image, the weight-based calculation may be performed on the second display parameter and the third display parameter of the frame of image to obtain the display parameter of the frame of image.
In the third gradual change state, when the display parameter of each frame image is calculated, the weight of the second display parameter is gradually reduced, and the weight of the third display parameter is gradually increased.
In a specific example, in the third gradation state, the sum of the weight of the second display parameter and the weight of the third display parameter is always 1. More specifically, the weight of the second display parameter of the first frame image in the second fade state may be 1, the weight of the second display parameter of the last frame image may be 0, and a difference between the weight of the first display parameter of each frame image and the weight of the first display parameter of the previous frame image from the second frame image may be a preset third step value, which is smaller than 0. The third step size value may be the same as the first step size value.
For more details about the third fade state, reference may be made to the above description about the first fade state, and details are not repeated here.
In the specific implementation of step S104, for each frame of image, the backlight brightness when the frame of image is displayed may be controlled according to the backlight parameter, and the pixels of the frame of image are backlight-adjusted and displayed according to the pixel parameter.
Further, in the process of displaying the image, the enable signal of the related function can be monitored according to a preset time interval, and the related function is a function which needs to adjust the backlight except the CABC function. The related function may be a sun screen function, a function of adjusting backlight according to the ambient light brightness, or the like, but is not limited thereto. It should be noted that, the monitoring of the enable signal of the associated function may be performed during the operation of the terminal, and is not limited to performing the monitoring only when the CABC function is in a certain state.
Further, if it is monitored that the enable signal of any associated function indicates that the associated function is turned on, and the priority of the turned-on associated function is greater than that of the CABC function, the fade-out state may be entered.
Specifically, if it is monitored that the associated function with a higher priority is turned on in the mode state, the mode can be directly migrated to enter the fade-out state; if the associated function with higher priority is monitored to be started in the gradual change state, the associated function can enter the gradual change state after the current gradual change state is finished.
Further, the historical mode state may also be saved. Specifically, if an enable signal of an associated function with a higher priority is monitored in a mode state, the mode state in which the enable signal is monitored is a history mode state; and if the enabling signal of the associated function with higher priority is monitored in the gradual change state, the target state indicated by the switching information triggering the gradual change state is the historical mode state. For example, if it is detected that the associated function with higher priority is turned on in the first fade state, and the target state indicated by the first switching information triggering the first fade state is the second mode state, the second mode state may be saved in the historical mode state. With such a scheme, when the CABC function is turned on again, the mode state desired by the last user can be quickly restored.
Further, in the fade-out state, when the display parameter of each frame image is calculated, the weight-based calculation may be performed on the historical display parameter and the default display parameter of each frame image to obtain the display parameter of the frame image. The historical display parameters of the image are obtained by calculating configuration parameters corresponding to a CABC algorithm and a historical mode state.
Further, the default display parameters may include: a default value for the backlight brightness and a default value for the pixel compensation factor. Wherein, the default values of the backlight brightness and the pixel compensation coefficient can be preset.
Further, in the fade-out state, the weight of the history display parameter is gradually decreased and the weight of the default display parameter is gradually increased as time passes, and when an end condition of the fade-out state is satisfied, the fade-out state is ended. Wherein the end condition of the fade-out state and the end condition of the first fade-out state may be the same.
In a specific example, in the fade-out state, the sum of the weight of the historical display parameter and the weight of the default display parameter is always 1. More specifically, the weight of the history display parameter of the first frame image in the fade-out state may be 1, the weight of the history display parameter of the last frame image may be 0, and a difference between the weight of the history display parameter of each frame image and the weight of the history display parameter of the previous frame image from the second frame image may be a preset fourth step value, which is smaller than 0. The fourth step value may be the same as the first step value.
Further, the CABC function may be turned off when the fade-out state ends.
Further, a CABC on signal may be obtained when the CABC function is turned off, which may be used to turn on the CABC function. The CABC on signal may be input by the user, or may be generated based on the associated functions with higher priority being turned off. More specifically, while the CABC function is turned off, the enable signals of the respective associated functions are still monitored, and the CABC on signal may be generated if the enable signals of the associated functions having a higher priority than the CABC all indicate that the associated functions are turned off.
Further, the fade-in state may be entered in response to the CABC on signal.
Specifically, in the fade-in state, for each frame of image, the history display parameter of the frame of image may be calculated by using a cabac algorithm and the history configuration parameter, and then the default display parameter and the history display parameter of each frame of image are calculated based on the weight to obtain the display parameter of the frame of image. The historical configuration parameters are the configuration parameters corresponding to the historical mode state saved when the CABC function is closed last time.
In the gradual-in state, when the display parameters of each frame image are calculated, the weight of the default display parameters is gradually reduced, and the weight of the historical display parameters is gradually increased. When the end condition of the fade-in state is satisfied, the fade-in state is ended. Wherein the end condition of the fade-in state and the end condition of the first fade-in state may be the same.
In a specific example, in the fade-in state, the sum of the weight of the history display parameter and the weight of the default display parameter is always 1. More specifically, the weight of the history display parameter of the first frame image in the fade-in state may be 0, the weight of the history display parameter of the last frame image may be 1, and a difference between the weight of the history display parameter of each frame image and the weight of the history display parameter of the previous frame image from the second frame image may be a preset fifth step value, which is greater than 0. The fifth step value may be the same as the second step value.
Therefore, in the scheme of this embodiment, mutual exclusion between a plurality of functions requiring backlight adjustment is realized by monitoring the enable signals of the associated functions. In addition, a gradual-in state and a gradual-out state are set when the CABC function is opened and closed, and the situation of picture flicker when the CABC function is opened and closed is favorably reduced.
It should be noted that, in the solution of this embodiment, for each frame of image, the specific method for calculating the display parameter of the image by using the CABC algorithm and the configuration parameter may be various existing appropriate methods, and this embodiment does not limit this.
In a specific example, for each frame of image, a histogram statistics method may be adopted to calculate a pixel value of each pixel point in the frame of image, so as to obtain a luminance statistic value of the frame of image; the backlight estimate may then be determined from the luminance statistic. Further, the backlight brightness of the frame image may be determined at least according to the backlight estimation value of the frame image and the backlight brightness of the previous frame image, and then the pixel compensation coefficient of the frame image may be determined according to the backlight brightness of the frame image.
In one non-limiting example, the pixel compensation coefficients may include: a first pixel compensation coefficient, a second pixel compensation coefficient, and a third pixel compensation coefficient.
The first pixel compensation coefficient is used for performing backlight compensation on pixel points in a first brightness region in an image, wherein the first brightness region is a pixel region with a pixel value smaller than or equal to a first preset threshold value; the second pixel compensation coefficient is used for performing backlight compensation on pixel points of a second brightness region in the image, wherein the second brightness region is a pixel region of which the pixel value is greater than the first preset threshold and smaller than a second preset threshold, and the second preset threshold is greater than the first preset threshold; and the third pixel compensation coefficient is used for performing backlight compensation on pixel points in a third brightness region in the image, wherein the third brightness region is a pixel region with a pixel value larger than or equal to a second preset threshold value.
Further, in the solution of this embodiment, the second pixel compensation coefficient is greater than the first pixel compensation coefficient and the third pixel compensation coefficient. In other words, the pixel compensation coefficient of the middle luminance region in the same frame image is larger than the compensation coefficients of the low luminance region and the high luminance region. By adopting the scheme, on one hand, the overall brightness of the image can be improved as much as possible by increasing the pixel compensation coefficient of the middle brightness area, and the backlight power consumption is favorably reduced as much as possible; on the other hand, compared with a scheme in which the low-luminance region and the medium-luminance region employ the same pixel compensation coefficient, the scheme in this embodiment can keep the luminance of the pixels in the low-luminance region from being increased too much, ensure that the change in the number of the pixel points belonging to the low-luminance region is small in the images before and after compensation, ensure that the change in the contrast of the images before and after compensation is small, and is beneficial to improving the display effect of the images.
Referring to fig. 3, fig. 3 is a partial schematic flow chart of another image display method according to an embodiment of the present invention. The image display method illustrated in fig. 3 may include steps S301 to S303, wherein the steps S301 to S303 may be performed after the step S103 and before the step S104. In the scheme of this embodiment, the step S301 to the step S304 are executed to perform the temporal filtering processing on the display parameters of the image, which is beneficial to avoiding the abrupt change of the brightness of the two frames before and after the image, and is further beneficial to avoiding the situation of the flicker of the image. It should be noted that, this embodiment does not limit the temporal filtering processing to be performed only on the image in the gradual change process, and the temporal filtering processing may be performed on each frame of image in the state where the CABC function is on. The image display method shown in fig. 3 includes:
step S301: calculating a difference between actual display parameters of a previous frame image and display parameters of the current frame image;
step S302: determining a filter coefficient according to the difference, wherein the larger the difference is, the larger the filter coefficient is;
step S303: calculating the display parameters of the current frame image and the actual display parameters of the previous frame image based on weight to obtain the actual display parameters of the current frame image;
the sum of the weight of the actual display parameter of the previous frame image and the weight of the display parameter of the current frame image is 1, and the filter coefficient is the weight of the actual display parameter of the previous frame image.
In the specific implementation of step S301, the actual display parameter of the previous frame image refers to the display parameter adopted when the previous frame image is displayed, and the display parameter of the current frame image refers to the calculated display parameter. Specifically, if the current frame image is in the mode state, the display parameters of the current frame image are the display parameters calculated by the CABC algorithm and the configuration parameters corresponding to the current mode state. If the image is in the gradual change state, the display parameters of the current frame image are the display parameters obtained through the weight-based calculation, that is, the display parameters obtained through the calculation in step S103.
In a specific implementation of step S302, a mapping relationship between the difference and the filter coefficient may be preset, and the filter coefficient may be determined according to the mapping relationship. More specifically, the filter coefficients may be determined by a table lookup. Wherein the larger the difference is, the larger the determined filter coefficient is.
In the specific implementation of step S303, the following formula may be adopted to calculate the actual display parameters of the current frame image:
Gain_cur＝α×Gain_pre+(1-α)×gain_cur
Bl_cur＝α×Bl_pre+(1-α)×bl_cur
wherein α is a filter coefficient, Gain _ pre is an actual pixel compensation coefficient of a previous frame image, Gain _ cur is a pixel compensation coefficient of a current frame image, Gain _ cur is an actual pixel compensation coefficient of the current frame image, Bl _ pre is an actual backlight brightness of the previous frame image, Bl _ cur is a backlight brightness of the current frame image, and Bl _ cur is an actual backlight brightness of the current frame image.
When the scheme is adopted, the larger the difference is, the larger the determined filter coefficient is, and the closer the actual display parameter of the current frame image is to the actual display parameter of the previous frame image, so that the situation of flicker caused by sudden change of the brightness of the picture can be reduced.
Referring to fig. 4, fig. 4 is a schematic structural diagram of an image display device in an embodiment of the present invention, and the device shown in fig. 4 may include:
an obtaining module 41, configured to obtain first switching information, where the first switching information is used to indicate that a current state of a CABC function is switched to a first target state, where the state of the CABC function includes: the CABC algorithm comprises a plurality of mode states and at least one gradual change state, wherein the different mode states correspond to different CABC algorithm configuration parameters;
a switching module 42, configured to enter a first gradual change state if the current state is a first mode state and the first target state is a second mode state different from the first mode state;
a first gradual change module 43, configured to perform weight-based calculation on a first display parameter and a second display parameter of each frame of image in the first gradual change state to obtain a display parameter of the frame of image, where the first display parameter is a display parameter calculated according to a cab c algorithm and a configuration parameter corresponding to the first mode state, and the second display parameter is a display parameter calculated according to a cab c algorithm and a configuration parameter corresponding to the second mode state;
a display module 44, configured to control display of each frame of image according to the display parameter of the frame of image;
in the first gradual change state, when the display parameters of each frame of image are calculated, the weight of the first display parameter is gradually reduced, and the weight of the second display parameter is gradually increased.
For more contents such as the working principle, the working method, and the beneficial effects of the image display apparatus in the embodiment of the present invention, reference may be made to the above description related to the image display method, and details are not repeated here.
Embodiments of the present invention further provide a storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the image display method are performed. The storage medium may include ROM, RAM, magnetic or optical disks, etc. The storage medium may further include a non-volatile memory (non-volatile) or a non-transitory memory (non-transient), and the like.
The embodiment of the present invention further provides a terminal, which includes a memory and a processor, where the memory stores a computer program that can be run on the processor, and the processor executes the steps of the image display method when running the computer program. The terminal includes, but is not limited to, a mobile phone, a computer, a tablet computer and other terminal devices.
It should be understood that, in the embodiment of the present application, the processor may be a Central Processing Unit (CPU), and the processor may also be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
It will also be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of illustration and not limitation, many forms of Random Access Memory (RAM) are available, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (enhanced SDRAM), SDRAM (SLDRAM), synchlink DRAM (SLDRAM), and direct bus RAM (DR RAM)
The above embodiments may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, the above-described embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer instructions or computer programs. The procedures or functions described in accordance with the embodiments of the present application are produced in whole or in part when the computer instructions or the computer program are loaded or executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer program may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer program may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire or wirelessly.
In the several embodiments provided in the present application, it should be understood that the disclosed method, apparatus and system may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative; for example, the division of the unit is only a logic function division, and there may be another division manner in actual implementation; for example, various elements or components may be combined or may be integrated into another system, or some features may be omitted, or not implemented. The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be physically included alone, or two or more units may be integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit. For example, for each device or product applied to or integrated into a chip, each module/unit included in the device or product may be implemented by hardware such as a circuit, or at least a part of the module/unit may be implemented by a software program running on a processor integrated within the chip, and the rest (if any) part of the module/unit may be implemented by hardware such as a circuit; for each device or product applied to or integrated with the chip module, each module/unit included in the device or product may be implemented by using hardware such as a circuit, and different modules/units may be located in the same component (e.g., a chip, a circuit module, etc.) or different components of the chip module, or at least some of the modules/units may be implemented by using a software program running on a processor integrated within the chip module, and the rest (if any) of the modules/units may be implemented by using hardware such as a circuit; for each device and product applied to or integrated in the terminal, each module/unit included in the device and product may be implemented by using hardware such as a circuit, and different modules/units may be located in the same component (e.g., a chip, a circuit module, etc.) or different components in the terminal, or at least part of the modules/units may be implemented by using a software program running on a processor integrated in the terminal, and the rest (if any) part of the modules/units may be implemented by using hardware such as a circuit.
It should be understood that the term "and/or" herein is only one kind of association relationship describing the association object, and means that there may be three kinds of relationships, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" in this document indicates that the former and latter related objects are in an "or" relationship.
The "plurality" appearing in the embodiments of the present application means two or more. The descriptions of the first, second, etc. appearing in the embodiments of the present application are only for illustrating and differentiating the objects, and do not represent the order or the particular limitation of the number of the devices in the embodiments of the present application, and do not constitute any limitation to the embodiments of the present application. Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected by one skilled in the art without departing from the spirit and scope of the invention, as defined in the appended claims.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (12)
1. An image display method, characterized in that the method comprises:
acquiring first switching information, wherein the first switching information is used for indicating that the current state of a CABC function is switched to a first target state, and the state of the CABC function comprises the following steps: the CABC algorithm comprises a plurality of mode states and at least one gradual change state, wherein the different mode states correspond to different CABC algorithm configuration parameters;
if the current state is a first mode state and the first target state is a second mode state different from the first mode state, entering a first gradual change state;
in the first gradual change state, performing weight-based calculation on a first display parameter and a second display parameter of each frame of image to obtain a display parameter of the frame of image, wherein the first display parameter is calculated according to a CABC algorithm and a configuration parameter corresponding to the first mode state, and the second display parameter is calculated according to the CABC algorithm and a configuration parameter corresponding to the second mode state;
controlling the display of each frame of image according to the display parameters of the frame of image;
in the first gradual change state, when the display parameters of each frame of image are calculated, the weight of the first display parameter is gradually reduced, and the weight of the second display parameter is gradually increased.
2. The image display method according to claim 1, characterized in that the method further comprises:
and entering the second mode state when the duration in the first gradual change state reaches a preset duration or the number of the images displayed in the first gradual change state reaches a preset threshold.
3. The image display method according to claim 1, characterized in that the method further comprises:
if second switching information is acquired in the first gradual change state and a second target state indicated by the second switching information is the same as the first mode state, keeping the first gradual change state;
entering a second gradual change state when the end condition of the first gradual change state is met;
under the second gradual change state, calculating the first display parameter and the second display parameter of each frame of image based on weight to obtain the display parameter of the frame of image;
in the second gradual change state, when the display parameters of each frame of image are calculated, the weight of the first display parameter is gradually increased, and the weight of the second display parameter is gradually decreased;
wherein the end condition of the first fade state comprises: the time length in the first gradual change state reaches a preset time length or the number of the images displayed in the first gradual change state reaches a preset threshold value.
4. The image display method according to claim 3, characterized in that the method further comprises:
if the second target state is the same as the second mode state, the second target state is kept in the first gradual change state, and when the ending condition of the first gradual change state is met, the second mode state is entered.
5. The image display method according to claim 3, characterized in that the method further comprises:
if the second target state is a third mode state which is different from the first mode state and the second mode state, keeping the second target state in the first gradual change state, and entering a third gradual change state when the end condition of the first gradual change state is met;
in the third gradual change state, performing weight-based calculation on a second display parameter and a third display parameter of each frame of image to obtain the display parameter of the frame of image, wherein the third display parameter is calculated according to a CABC algorithm and a configuration parameter corresponding to the third mode state;
in the third gradual change state, when the display parameter of each frame image is calculated, the weight of the second display parameter is gradually reduced, and the weight of the third display parameter is gradually increased.
6. The image display method according to claim 1, characterized in that the method further comprises:
monitoring an enabling signal of a related function, wherein the related function is a function needing to adjust backlight except a CABC function;
entering a fade-out state if the enable signal of any associated function indicates that the associated function is opened and the priority of the opened associated function is greater than that of CABC;
under the fade-out state, performing weight-based calculation on the historical display parameters and default display parameters of each frame of image to obtain the display parameters of the frame of image;
in the fade-out state, when the display parameters of each frame image are calculated, the weight of the historical display parameters is gradually reduced, and the weight of the default display parameters is gradually increased.
7. The image display method according to claim 1, wherein before the first switching information is acquired, the method further comprises:
acquiring a CABC opening signal;
entering a fade-in state in response to the CABC on signal;
in the gradual-in state, calculating the default display parameters and the historical display parameters of each frame of image based on weight to obtain the display parameters of the frame of image;
in the progressive state, when the display parameters of each frame image are calculated, the weight of the default display parameters is gradually reduced, and the weight of the historical display parameters is gradually increased.
8. The image display method according to claim 1, wherein before controlling display of each frame image according to the display parameter of the frame image, the method further comprises:
calculating a difference between actual display parameters of a previous frame image and display parameters of the current frame image;
determining a filter coefficient according to the difference, wherein the larger the difference is, the larger the filter coefficient is;
calculating the display parameters of the current frame image and the actual display parameters of the previous frame image based on weight to obtain the actual display parameters of the current frame image;
the sum of the weight of the actual display parameter of the previous frame image and the weight of the display parameter of the current frame image is 1, and the filter coefficient is the weight of the actual display parameter of the previous frame image.
9. The image display method according to claim 1, wherein the display parameters include:
the first pixel compensation coefficient is used for performing backlight compensation on pixel points in a first brightness area in the image;
the second pixel compensation coefficient is used for performing backlight compensation on pixel points in a second brightness area in the image;
the third pixel compensation coefficient is used for performing backlight compensation on pixel points in a third brightness area in the image;
wherein the first brightness region is a pixel region with a pixel value less than or equal to a first preset threshold value,
the third brightness area is a pixel area with a pixel value greater than or equal to a second preset threshold, the second brightness area is a pixel area with a pixel value greater than the first preset threshold and less than the second preset threshold, and the second preset threshold is greater than the first preset threshold;
the second pixel compensation coefficient is larger than the first pixel compensation coefficient and the third pixel compensation coefficient.
10. An image display apparatus, characterized in that the apparatus comprises:
an obtaining module, configured to obtain first switching information, where the first switching information is used to indicate that a current state of a CABC function is switched to a first target state, and the state of the CABC function includes: the CABC algorithm comprises a plurality of mode states and at least one gradual change state, wherein the CABC algorithm corresponding to different mode states has different configuration parameters;
the switching module is used for entering a first gradual change state if the current state is a first mode state and the first target state is a second mode state different from the first mode state;
the first gradual change module is used for calculating a first display parameter and a second display parameter of each frame of image based on weight under the first gradual change state so as to obtain the display parameter of the frame of image, wherein the first display parameter is obtained by calculating according to a CABC algorithm and a configuration parameter corresponding to the first mode state, and the second display parameter is obtained by calculating according to the CABC algorithm and the configuration parameter corresponding to the second mode state;
the display module is used for controlling the display of each frame of image according to the display parameters of each frame of image;
in the first gradual change state, when the display parameters of each frame of image are calculated, the weight of the first display parameter is gradually reduced, and the weight of the second display parameter is gradually increased.
11. A storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, performs the steps of the image display method of any one of claims 1 to 9.
12. A terminal comprising a memory and a processor, the memory having stored thereon a computer program operable on the processor, wherein the processor executes the computer program to perform the steps of the image display method of any of claims 1 to 9.
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