CN111754946A - Image quality optimization method, display device and computer readable storage medium - Google Patents
Image quality optimization method, display device and computer readable storage medium Download PDFInfo
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- CN111754946A CN111754946A CN202010639038.9A CN202010639038A CN111754946A CN 111754946 A CN111754946 A CN 111754946A CN 202010639038 A CN202010639038 A CN 202010639038A CN 111754946 A CN111754946 A CN 111754946A
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- 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
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
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Abstract
The invention discloses a picture quality optimization method, a display device and a computer readable storage medium, wherein the picture quality optimization method comprises the following steps: acquiring display data of a current display image; determining the average brightness and the target duty ratio of the current display image according to the display data; the target backlight brightness is determined based on the average brightness and the target duty ratio, the current display image is adjusted based on the target backlight brightness, the brightness range of the image displayed by the display device is determined according to the brightness of the actually displayed image, and the problem of poor image quality caused by inaccurate brightness due to the fact that the image brightness range is determined according to a fixed value is solved.
Description
Technical Field
The present invention relates to the field of image display technologies, and in particular, to an image quality optimization method, a display device, and a computer-readable storage medium.
Background
In the HDR (High-Dynamic Range) algorithm, when performing luminance mapping, a maximum luminance that can be displayed by a display device is determined first, and a saturated luminance region is set according to the maximum luminance that can be displayed by the display device, and whether the setting of the saturated luminance region matches the maximum luminance that can be actually displayed by the display device affects a change of a luminance curve.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The present invention is directed to a method for optimizing image quality, a display device and a computer readable storage medium, and aims to solve the problem that the HDR image effect is not good when the maximum luminance actually displayed is different from the luminance parameter of the HDR algorithm because the conventional display device with a local dimming function cannot adjust the luminance parameter of the HDR algorithm according to the maximum luminance actually displayed.
In order to achieve the above object, the present invention provides an image quality optimization method, including:
acquiring display data of a current display image;
determining the average brightness and the target duty ratio of the current display image according to the display data;
determining a target backlight brightness based on the average brightness and a target duty cycle;
adjusting a current display image based on the target backlight brightness.
Optionally, the currently displayed image includes a plurality of partitions, the display data includes a brightness of each of the partitions, and the step of determining the average brightness of the currently displayed image according to the display data includes:
acquiring brightness information of each partition in the current display image;
and determining the average brightness of the current display image according to the brightness information of each partition.
Optionally, the currently displayed image includes a plurality of partitions, the display data includes a duty cycle of each partition, and the step of determining the target duty cycle of the currently displayed image according to the display data includes:
acquiring the duty ratio of each partition in the current display image;
determining the maximum value of the duty ratios of each partition, and taking the maximum value as the target duty ratio of the current display image.
Optionally, the step of determining a maximum value of the duty ratios of each of the partitions, and using the maximum value as the target duty ratio of the currently displayed image further includes:
determining a target partition corresponding to the target duty ratio in the current display image;
determining duty cycle correction information for the target partition;
the step of determining a target backlight brightness based on the average brightness and a target duty cycle comprises:
and correcting the target duty ratio according to the duty ratio correction information, and determining the target backlight brightness according to the corrected target duty ratio and the backlight driving current.
Optionally, the step of determining the duty cycle correction information of the target partition includes:
determining duty cycle information of a partition adjacent to the target partition;
determining the duty cycle correction information according to the duty cycle information of the partition adjacent to the target partition.
Optionally, the step of determining the target backlight brightness based on the average brightness and the target duty ratio includes:
determining a backlight driving current corresponding to the average brightness based on the average brightness;
determining a target backlight brightness based on the backlight driving current and the target duty ratio.
Optionally, the step of determining the target backlight brightness based on the backlight driving current and the target duty ratio includes:
and determining the target backlight brightness based on a preset mapping relation between the backlight driving current and the target backlight brightness, the backlight driving current and the target duty ratio.
Optionally, the step of adjusting the currently displayed image based on the target backlight brightness includes:
mapping the target luminance into a luminance value domain according to tone mapping based on the target backlight luminance;
and adjusting the current display image according to the target backlight brightness domain.
In addition, to achieve the above object, the present invention further provides a display device, including a memory, a processor, and a video quality optimization program stored in the memory and executable on the processor, wherein the video quality optimization program, when executed by the processor, implements the steps of the video quality optimization method according to any one of the above aspects.
In order to achieve the above object, the present invention further provides a computer-readable storage medium storing a method for optimizing image quality, wherein the method for optimizing image quality is implemented by any one of the steps of the method for optimizing image quality when executed by a processor.
According to the image quality optimization method, the display device and the computer-readable storage medium provided by the embodiment of the invention, the target brightness of the current display image is determined through the duty ratio and the driving current of the current display image, so that the brightness range of the image can be determined according to the target brightness when the image display is executed through the HDR algorithm, the current display image is displayed on the display device through the brightness range, and the brightness range is determined according to the brightness of the image instead of a fixed value, so that the accurate brightness range of the current display image can be obtained, and the effect of optimizing the image quality is achieved.
Drawings
Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of example 1 of the present invention;
FIG. 3 is a schematic flow chart of example 2 of the present invention;
FIG. 4 is a schematic flow chart of example 3 of the present invention;
FIG. 5 is a schematic flow chart of example 4 of the present invention;
FIG. 6 is a schematic flow chart of example 5 of the present invention;
FIG. 7 is a schematic flow chart of example 6 of the present invention;
FIG. 8 is a schematic flow chart of example 7 of the present invention;
FIG. 9 is a flowchart of embodiment 8 of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
As shown in fig. 1, fig. 1 is a schematic device structure diagram of a hardware operating environment according to an embodiment of the present invention.
As shown in fig. 1, the apparatus may include: a controller 1001, such as a CPU, a network interface 1004, a user interface 1003, a memory 1005, and a communication bus 1002. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 1005 may alternatively be a storage device separate from the controller 1001 described above.
Those skilled in the art will appreciate that the configuration of the device shown in fig. 1 is not intended to be limiting of the device and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, the memory 1005, which is a kind of computer storage medium, may include therein an operating system, a network communication module, a user interface module, and an application program.
In the server shown in fig. 1, the user interface 1003 is mainly used for interaction with a user, and the controller 1001 may be used to call an application program stored in the memory 1005 and perform the following operations:
acquiring display data of a current display image;
determining the average brightness and the target duty ratio of the current display image according to the display data;
determining a target backlight brightness based on the average brightness and a target duty cycle;
adjusting a current display image based on the target backlight brightness.
Further, the controller 1001 may call an application program stored in the memory 1005, and also perform the following operations:
acquiring brightness information of each partition in the current display image;
and determining the average brightness of the current display image according to the brightness information of each partition.
Further, the controller 1001 may call an application program stored in the memory 1005, and also perform the following operations:
acquiring the duty ratio of each partition in the current display image;
determining the maximum value of the duty ratios of each partition, and taking the maximum value as the target duty ratio of the current display image.
Further, the controller 1001 may call an application program stored in the memory 1005, and also perform the following operations:
determining a target partition corresponding to the target duty ratio in the current display image;
determining duty cycle correction information for the target partition;
and correcting the target duty ratio according to the duty ratio correction information, and determining the target backlight brightness according to the corrected target duty ratio and the backlight driving current.
Further, the controller 1001 may call an application program stored in the memory 1005, and also perform the following operations:
determining duty cycle information of a partition adjacent to the target partition;
determining the duty cycle correction information according to the duty cycle information of the partition adjacent to the target partition.
Further, the controller 1001 may call an application program stored in the memory 1005, and also perform the following operations:
determining a backlight driving current corresponding to the average brightness based on the average brightness;
determining a target backlight brightness based on the backlight driving current and the target duty ratio.
Further, the controller 1001 may call an application program stored in the memory 1005, and also perform the following operations:
and determining the target backlight brightness based on a preset mapping relation between the backlight driving current and the target backlight brightness, the backlight driving current and the target duty ratio.
Further, the controller 1001 may call an application program stored in the memory 1005, and also perform the following operations:
mapping the target luminance into a luminance value domain according to tone mapping based on the target backlight luminance;
and adjusting the current display image according to the target backlight brightness domain.
The invention mainly aims to provide an image quality optimization method, a display device and a computer readable storage medium.
Example 1
Referring to fig. 2, an embodiment 1 of the present invention provides a method for optimizing image quality, where the method includes:
s100, acquiring display data of a current display image;
specifically, the currently displayed image is a frame image displayed on the display, the frame image may be a frame image captured from a video, or may be from a separate image file, and the display data is information extracted from the currently displayed image.
S200, determining the average brightness and the target duty ratio of the current display image according to the display data;
specifically, the display data includes an average luminance which is an average luminance of all pixels of the currently displayed image and a target duty which is a duty for determining the target luminance, and the duty is a ratio of the power-on time to the total time in one pulse cycle.
S300, determining target backlight brightness based on the average brightness and the target duty ratio;
specifically, the target backlight luminance is a parameter for changing the luminance of the currently displayed image according to the value.
In some alternative embodiments, the target backlight brightness is the maximum brightness of the current display frame, and the brightness range of the current display frame may be determined according to the maximum brightness.
S400, adjusting the current display image based on the target backlight brightness.
In some optional embodiments, the target brightness corresponding to the target duty ratio may be calculated according to the target duty ratio, if the target duty ratio is the maximum duty ratio, the target backlight brightness corresponding to the maximum duty ratio may be calculated, at this time, the target backlight brightness is the maximum brightness, and after the target backlight brightness is obtained, the target backlight brightness is tone-mapped according to the HDR algorithm and the current display image is further adjusted.
According to the invention, the target brightness of the current display image is determined by acquiring the display data of the current display image and by duty ratio information and brightness information in the display data, and the image is displayed on the display device by the target brightness, so that the display device can display brightness ranges corresponding to different images, and the display device can acquire the display data in real time and display the brightness according with the actual situation of the image in real time to achieve the effect of optimizing the image quality.
Example 2
Referring to fig. 3, the step S200 includes:
s210, acquiring the brightness information of each partition in the current display image;
specifically, the current display image includes a plurality of partitions each composed of a plurality of pixels, each partition including luminance information of each pixel and also including luminance information of the partition determined by the luminance information of each pixel.
In some alternative embodiments, each pixel in the currently displayed image includes three sub-pixels of red, green and blue, each sub-pixel is configured to process a color channel, each sub-pixel corresponds to a gray-scale value for representing the brightness of the sub-pixel, the brightness of the pixel is determined according to the gray-scale value, for example, the maximum of the three gray-scale values corresponding to the three sub-pixels of each pixel can be determined as the maximum gray-scale value of the pixel, and the maximum gray-scale value of the pixel is used to represent the brightness of the pixel, and further, the gray-scale value of the pixel can be determined jointly by the gray-scale values of the three sub-pixels of each pixel by setting a weight parameter for representing the weight of each sub-pixel in calculating the gray-scale value of the pixel, the weight also refers to a ratio, assuming that the gray-scale value of the pixel is Gr and the gray-scale value of the red sub-pixel is R, the weight of the red sub-pixel gray scale value is a, the weight of the green sub-pixel gray scale value is G, the weight of the green sub-pixel gray scale value is B, the blue sub-pixel gray scale value is B, and the weight of the green sub-pixel gray scale value is c, then Gr ═ a × R + B + G + c × B, for example, R of a certain pixel is 52, G is 126, B is 175, a is 0.3, B is 0.59, and c is 0.11, then the pixel gray scale value Gr is 109.19, and the integer part of 109.19 is taken as the gray scale value of the pixel, namely 109.
S220, determining the average brightness of the current display image according to the brightness information of each partition.
Specifically, the luminance information of different partitions of the current display image includes gray-scale values of pixels of different partitions, the gray-scale values of all the pixels are summed and divided by the number of the pixels to calculate an average value of the gray-scale values of all the pixels, the average value of the gray-scale values of all the pixels is average luminance, the average luminance is the average luminance of the current display image, and the display data includes the average luminance.
In some optional embodiments, the display data further comprises partition information comprising a partition status of the display and a partition status of a currently displayed image.
According to the invention, the display data of the current display image is obtained, the average brightness of the current display image is determined through the brightness information in the display data, the target backlight brightness is determined through the average brightness and the target duty ratio, and the image is displayed on the display device through the target backlight brightness, so that the display device can display the brightness ranges corresponding to different images, and the display device can obtain the display data in real time and display the brightness according with the actual condition of the image in real time to achieve the effect of optimizing the image quality.
Example 3
Referring to fig. 4, in embodiment 1, the step S200 further includes:
s230, acquiring the duty ratio of each partition in the current display image;
specifically, the duty ratio indicates the ratio of the duration of a positive pulse representing 1 to the total period of the pulse in a series of pulse sequences, the currently displayed image contains a plurality of partitions, and the duty ratio of each partition is determined by the brightness of the partition.
In some optional embodiments, the liquid crystal panel is used as the display, the backlight source material of the liquid crystal panel is a Light Emitting Diode (LED), the LED is modulated to emit visible Light, the Modulation method includes Amplitude Modulation (AM) and Pulse Width Modulation (PWM), and PWM has a characteristic of high color control accuracy and is suitable for a digital circuit used in the display device, so PWM is preferentially used to drive the LED to emit visible Light. Wherein the digital circuit is a complex circuit composed of logic gates, the digital circuit mainly processes digital signals, i.e., the signal is composed of two states of 0 and 1, and thus has strong interference resistance, PWM is a square wave signal whose period is constant and the duty ratio of high level and low level can be modulated, when the output pulse period is fixed, the duty ratio is larger, the output effective voltage is larger, the power generated, converted and consumed when the display operates is higher, the brightness of the LED is higher, since the LED emits light rapidly and not continuously when emitting light, when the frequency of the PWM reaches a critical value, the feeling of human eyes flickering disappears, when the frequency of the PWM is higher than the critical value, the brightness sensed by human eyes is the average brightness of the LED in the whole period, the brightness can be controlled by the duty ratio of the PWM, which is larger when the duty ratio of the PWM is larger.
S240, determining the maximum value of the duty ratios of the partitions, and taking the maximum value as the target duty ratio of the current display image.
In some optional embodiments, the maximum brightness is determined by calculating a maximum value of the brightness of all the pixels, and the target duty ratio corresponding to the maximum brightness is calculated according to a relationship between the brightness and the duty ratio, specifically, the relationship between the brightness and the duty ratio may be determined by measuring the brightness corresponding to different duty ratios, wherein when the measurement is performed, the brightness when the duty ratio is 0% is the minimum brightness, and the brightness when the duty ratio is 100% is the maximum brightness, and the relationship between the duty ratio and the brightness is determined by adopting a piecewise fitting manner, wherein the piecewise fitting refers to a process of connecting every two adjacent reference points through a continuous curve, the piecewise fitting is used to convert discrete data into a continuous function, the function is used to represent a linear relationship between the duty ratio and the brightness, and the target duty ratio corresponding to the target brightness is determined according to the linear relationship.
Example 4
Referring to fig. 5, in embodiment 3, the step S240 includes:
s241, determining a target partition corresponding to the target duty ratio in the current display image;
specifically, the target partition is a partition in which the target duty ratio is located.
In some optional embodiments, the currently displayed image includes a plurality of partitions, each partition corresponds to a duty ratio of the partition, the target duty ratios in all the partitions are determined by comparing the duty ratios of all the partitions, and the position of the partition corresponding to the target duty ratio is searched, where the target duty ratio is the duty ratio used for obtaining the target backlight brightness.
S242, determining duty ratio correction information of the target partition;
in some optional embodiments, the partition adjacent to the partition of the target duty ratio is located, the duty ratio correction information is calculated according to the duty ratios of the adjacent partitions, the weighting calculation may be performed by an average value and a maximum value of the duty ratios of the adjacent partitions, the weighting calculation refers to performing calculation according to a weight value, the weight value refers to a ratio occupied by the average value or the maximum value when calculating the duty ratio correction information, the weight value ranges from 0 to 1, a sum of the weight values of the average value and the maximum value is 1, for example, the average value is set to a, the weight value of the average value is set to d, the maximum value is set to M, the weight value of the maximum value is set to e, the duty ratio correction information is set to T, then T is d + a + e M, and in addition, when calculating the duty ratio correction information of the adjacent partitions, the duty ratios of the adjacent partitions may also be filtered, for example, leaving only the desired value.
In embodiment 4, in performing the above steps S241 and S242, the step S400 includes:
s410, correcting the target duty ratio according to the duty ratio correction information, and determining the target backlight brightness according to the corrected target duty ratio.
In some optional embodiments, after the duty ratio correction information of the target partition is determined, the target duty ratio is corrected according to the duty ratio correction information, and the method for correcting the target duty ratio according to the duty ratio correction information is to calculate the sum of the duty ratio correction information and the target duty ratio, or to perform weighted calculation on the duty ratio correction information and the target duty ratio, and after the target duty ratio is corrected by the duty ratio correction information, the target backlight luminance is calculated according to the corrected target duty ratio.
According to the invention, the duty ratio of the adjacent subarea of the target subarea of the display image is determined, the influence condition of the adjacent subarea on the duty ratio information of the target subarea is further determined, and the target duty ratio is corrected according to the influence condition, so that the accuracy of the target backlight brightness is improved, the display device can display the image according to the corrected target backlight brightness when displaying the image, the accuracy of the brightness when the display device displays the image is enhanced, and the effect of optimizing the image quality is achieved.
Example 5
Referring to fig. 6, in embodiment 4, the step S242 includes:
s2421, determining duty ratio information of partitions adjacent to the target partition;
s2422, determining the duty ratio correction information according to the duty ratio information of the adjacent subarea of the target subarea.
In some optional embodiments, according to the display bit number of the display panel being 8 bits, the gray scale of the sub-pixel of each pixel point has 256 gray scales, the gray scale value of which is between 0 and 255, and thus the maximum gray scale value of the pixel point is 255, the current display image includes a plurality of partitions, a partition adjacent to the target partition is searched, duty ratio information of the adjacent partition is determined, duty ratio correction information is determined according to the duty ratio of the adjacent partition, and the luminance of the adjacent partition has an influence on the luminance of the target partition, for example, if the bit number of the display is 8 bits, the maximum value of the luminance signal value is 255, when the luminance signal value of the target partition is 255, the luminance value of the target partition reaches the limit value of the display, at this time, the luminance signal value of the target partition does not change even if the luminance signal value of the adjacent partition is referred to, so the luminance of the adjacent area of the target partition has an influence on the luminance, when the luminance signal of the target partition is less than 255, the influence of the luminance of the adjacent area of the target partition on the luminance of the target partition needs to be referred to, and at this time, the duty ratio of the target partition needs to be corrected through the duty ratio of the adjacent partition, so that the duty ratio of the target partition is more accurate, and the target backlight luminance is further determined through the target duty ratio.
In other optional embodiments, the display bit number of the display panel is 10 bits, the gray scale of each sub-pixel of each pixel is 1024, the gray scale value of each sub-pixel is between 0 and 1023, the maximum gray scale value of the pixel is 1023, when the maximum gray scale value is calculated, the maximum gray scale value of the three sub-pixels is taken, for example, the gray scale value of the red sub-pixel of a certain pixel is 1020, the gray scale value of the green sub-pixel is 0, and the gray scale value of the blue sub-pixel is 10, then the maximum gray scale value of the pixel is 1020, and the maximum brightness represented by the pixel is 1020.
The duty ratio correction information is determined by calculating the duty ratio of the adjacent partitions of the target partition, and the target duty ratio is corrected according to the duty ratio correction information, so that when the target backlight brightness is calculated according to the target duty ratio, the calculation result is more accurate, and further when the brightness range of the currently displayed image is adjusted, the image can display more accurate brightness, and the image quality is optimized.
Example 6
Referring to fig. 7, in embodiment 1, the step S300 includes:
s310, determining corresponding backlight driving current according to the average brightness;
specifically, the backlight driving current is a current amplitude required by the display device to display a certain luminance, and the backlight driving current required to display the average luminance of the image can be determined according to a preset relationship between the luminance and the current amplitude.
And S320, determining target backlight brightness based on the backlight driving current and the target duty ratio.
In some optional embodiments, the relationship between the luminance and the current may be regarded as a linear relationship, and the luminance corresponding to the backlight driving current is calculated according to the linear relationship, and the target luminance corresponding to the target duty ratio may be calculated by combining the target duty ratio, if the target duty ratio is the maximum duty ratio, the target backlight luminance corresponding to the maximum duty ratio may be calculated by combining the backlight driving current, and the target backlight luminance at this time is the maximum backlight luminance, and after the maximum backlight luminance is obtained, luminance mapping is performed on the maximum backlight luminance according to an HDR algorithm, and the current display image is further displayed.
According to the invention, the target backlight brightness of the image to be displayed is determined by acquiring the image information of the image to be displayed and the duty ratio information and the brightness information in the image information, and the image is displayed on the display device through the target backlight brightness, so that the display device can display the brightness ranges corresponding to different images, and the display device can acquire the image information in real time and display the brightness according with the actual condition of the image in real time to achieve the effect of optimizing the image quality.
Example 7
Referring to fig. 8, in embodiment 6, the step S320 includes:
s321, determining the target backlight brightness according to the preset mapping relation between the backlight driving current and the target backlight brightness, the backlight driving current and the target duty ratio.
In some optional embodiments, by measuring the backlight brightness of the backlight display material corresponding to different backlight driving currents, a preset mapping relationship between the backlight driving current and the target backlight brightness may be determined, and according to the preset mapping relationship, the corresponding target backlight brightness may be calculated according to the backlight driving current, and when the target backlight brightness to be calculated is the maximum brightness, the target backlight brightness may be calculated by combining the maximum duty ratio and the backlight driving current.
The invention provides a target brightness calculation method for calculating target brightness by combining the relation between backlight driving current and target backlight brightness and a target duty ratio.
Example 8
Referring to fig. 9, in embodiment 1, the step S400 includes:
s410, mapping the target backlight brightness into a brightness value domain through tone mapping based on the target backlight brightness;
in particular, tone mapping is a computer graphics technique that approximates the display of high dynamic range images on a limited dynamic range medium, where the luminance range is a range of luminances whose maximum luminance for the display does not exceed the maximum luminance that the display itself can display.
In some alternative embodiments, the target backlight brightness is a maximum brightness, a brightness range of the current display picture is determined based on the maximum brightness, wherein the maximum brightness is a maximum value in the brightness range, the brightness range is mapped into the brightness value domain by mapping the maximum value of the brightness range to a maximum value of the brightness value domain, and the brightness range is mapped to the brightness value domain based on the maximum value of the brightness range.
And S420, adjusting the current display image according to the brightness value range.
Specifically, the brightness range of the currently displayed image is adjusted according to the brightness value range.
The invention calculates the target brightness of the current display image and adjusts the current display image according to the target brightness, so that the brightness range displayed by the display is adjusted according to the brightness range of the current display image in real time, and the effect of optimizing the image quality is realized.
In order to achieve the above object, the present invention further provides a display device, including a memory, a processor, and a video quality optimization program stored in the memory and executable on the processor, wherein the video quality optimization program, when executed by the processor, implements the steps of the video quality optimization method according to any one of the above embodiments.
In order to achieve the above object, the present invention further provides a computer-readable storage medium storing a method for optimizing image quality, wherein the method for optimizing image quality is implemented by a processor according to any one of the above embodiments.
In some alternative embodiments, the processor may be a Central Processing Unit (CPU), other general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, a discrete hardware component, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The storage may be an internal storage unit of the device, such as a hard disk or a memory of the device. The memory may also be an external storage device of the device, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), etc. provided on the device. Further, the memory may also include both internal and external storage units of the device. The memory is used for storing the computer program and other programs and data required by the device. The memory may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. An image quality optimization method, comprising:
acquiring display data of a current display image;
determining the average brightness and the target duty ratio of the current display image according to the display data;
determining a target backlight brightness based on the average brightness and a target duty cycle;
adjusting a current display image based on the target backlight brightness.
2. The method of claim 1, wherein the current display image comprises a plurality of regions, the display data comprises a brightness of each of the regions, and the determining the average brightness of the current display image according to the display data comprises:
acquiring brightness information of each partition in the current display image;
and determining the average brightness of the current display image according to the brightness information of each partition.
3. The method of claim 1, wherein the current display image comprises a plurality of segments, the display data comprises a duty cycle for each segment, and the determining the target duty cycle for the current display image according to the display data comprises:
acquiring the duty ratio of each partition in the current display image;
determining the maximum value of the duty ratios of each partition, and taking the maximum value as the target duty ratio of the current display image.
4. The method for optimizing image quality according to claim 3, wherein the step of determining a maximum value of the duty ratios of the respective segments and using the maximum value as the target duty ratio of the current display image further comprises:
determining a target partition corresponding to the target duty ratio in the current display image;
determining duty cycle correction information for the target partition;
the step of determining a target backlight brightness based on the average brightness and a target duty cycle comprises:
and correcting the target duty ratio according to the duty ratio correction information, and determining the target backlight brightness according to the corrected target duty ratio and the average brightness.
5. The image quality optimization method according to claim 4, wherein the step of determining the duty correction information of the target partition includes:
determining duty cycle information of a partition adjacent to the target partition;
determining the duty cycle correction information according to the duty cycle information of the partition adjacent to the target partition.
6. The image quality optimization method according to claim 1, wherein the step of determining the target backlight brightness based on the average brightness and the target duty ratio comprises:
determining a backlight driving current corresponding to the average brightness based on the average brightness;
determining a target backlight brightness based on the backlight driving current and the target duty ratio.
7. The image quality optimization method according to claim 6, wherein the step of determining a target backlight brightness based on the backlight driving current and the target duty ratio comprises:
and determining the target backlight brightness based on a preset mapping relation between the backlight driving current and the target backlight brightness, the backlight driving current and the target duty ratio.
8. The image quality optimization method according to claim 1, wherein the step of adjusting the currently displayed image based on the target backlight brightness comprises:
mapping the target luminance into a luminance value domain according to tone mapping based on the target backlight luminance;
and adjusting the current display image according to the target backlight brightness domain.
9. A display device comprising a memory, a processor, and a video optimization program stored on the memory and executable on the processor, wherein the video optimization program when executed by the processor implements the steps of the video optimization method of any one of claims 1 to 8.
10. A computer-readable storage medium having stored thereon a method for image quality optimization, which when executed by a processor implements the steps of the method for image quality optimization according to any one of claims 1-8.
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