CN115734040A - Display apparatus and image processing method - Google Patents

Abstract

The application provides a display apparatus and an image processing method. The display device includes: a display screen for displaying an image; a processor coupled to the display screen, the processor configured to: acquiring an image to be displayed; acquiring the maximum brightness value of the display equipment according to the image to be displayed; wherein the maximum brightness value is related to the brightness of the image to be displayed; adjusting the brightness of the image to be displayed according to the brightness value of each pixel point in the image to be displayed, the pixel value of each pixel point and the maximum brightness value of the display equipment to obtain a target image; the brightness value of each pixel point in the target image is smaller than the maximum brightness value of the display equipment; and controlling the display screen to display the image based on the target image. The application improves the accuracy of image display.

Description

Display apparatus and image processing method

Technical Field

The embodiment of the application relates to a display technology. And more particularly, to a display apparatus and an image processing method.

Background

Low-Dynamic Range (LDR), standard Dynamic Range (SDR), and High-Dynamic Range (HDR) may all be used to describe the Range of luminance variations of a frame of image. The brightness variation range of the HDR image is larger than that of the LDR image, and the brightness variation range of the SDR image is larger than that of the HDR image, so that the display effect of the HDR image is closer to reality. Typically, the HDR image may range in luminance from 0-10000nit (nit), whereas the luminance of a common display screen typically does not exceed 1000nit.

Currently, a conventional display screen displays an HDR image by using, as a specific luminance, the maximum luminance that can be achieved by the display screen. And then, reducing the brightness value of the pixel point with the brightness value larger than the specific brightness in the HDR image to the brightness value smaller than the specific brightness according to a preset tone mapping algorithm to obtain the adjusted HDR image. Then, the display screen displays the adjusted HDR image. However, the above method often results in overexposure or over-darkening of the adjusted HDR image. That is, the existing method of displaying HDR images is less accurate.

Disclosure of Invention

Exemplary embodiments of the present application provide a display apparatus and an image processing method that can improve accuracy of displaying an image.

In a first aspect, some embodiments of the present application provide a display device, including:

a display screen for displaying an image;

a processor coupled to the display screen, the processor configured to:

acquiring an image to be displayed;

acquiring the maximum brightness value of the display equipment according to the image to be displayed; wherein the maximum brightness value is related to the brightness of the image to be displayed;

adjusting the brightness of the image to be displayed according to the brightness value of each pixel point in the image to be displayed, the pixel value of each pixel point and the maximum brightness value of the display equipment to obtain a target image; the brightness value of each pixel point in the target image is smaller than the maximum brightness value of the display equipment;

and controlling the display screen to display images based on the target image.

In some embodiments, the processor is configured to:

acquiring target parameter information of the image to be displayed according to the image to be displayed; the target parameter is related to the brightness of the image to be displayed;

and acquiring the maximum brightness value of the display equipment according to the image to be displayed and the mapping relation between the target parameter information and the maximum brightness value.

In some embodiments, the target parameter information comprises: average picture level; the mapping relationship comprises: a mapping of the average image level of the image to a maximum luminance value of the display device; the maximum brightness value is inversely related to the average image level;

the processor is configured to:

and acquiring the average image level of the image to be displayed according to the brightness value of each pixel point in the image to be displayed.

In some embodiments, the target parameter information comprises: a gray level histogram; the mapping relationship comprises: mapping relation between the image gray level histogram and the maximum brightness value of the display equipment;

the processor is configured to:

and acquiring a gray level histogram of the image to be displayed according to the pixel value of each pixel point in the image to be displayed.

In some embodiments, the processor is configured to:

receiving an update instruction, the update instruction comprising: the updated mapping relation between the target parameter information and the maximum brightness value;

and replacing the mapping relation between the target parameter information and the maximum brightness value by using the updated mapping relation between the target parameter information and the maximum brightness value.

In some embodiments, the processor is configured to:

judging whether pixel points with brightness values larger than a first preset brightness threshold exist in the image to be displayed;

if the pixel point with the brightness value larger than a first preset brightness threshold value exists in the image to be displayed, the maximum brightness value of the display equipment is obtained according to the image to be displayed.

In some embodiments, the processor is configured to:

inputting the brightness value of each pixel point in the image to be displayed and the maximum brightness value of the display equipment into a preset tone mapping algorithm to obtain the mapping brightness value of each pixel point in the image to be displayed;

and according to the mapping brightness value of each pixel point in the image to be displayed, reducing the brightness value of the pixel point which is larger than the first preset brightness threshold value in the image to be displayed to obtain the target image.

In some embodiments, the processor is configured to:

and if the display equipment starts a function of dynamically adjusting the image brightness, acquiring the maximum brightness value of the display equipment according to the image to be displayed.

In some embodiments, the processor is configured to:

acquiring a video stream to be displayed;

and acquiring the image to be displayed from the video stream to be displayed.

In a second aspect, some embodiments of the present application provide an image processing method, where the method is applied to a display device, where the display device includes a display screen, and the method includes:

acquiring an image to be displayed;

acquiring the maximum brightness value of the display equipment according to the image to be displayed; wherein the maximum brightness value is related to the brightness of the image to be displayed;

adjusting the brightness of the image to be displayed according to the brightness value of each pixel point in the image to be displayed, the pixel value of each pixel point and the maximum brightness value of the display equipment to obtain a target image; the brightness value of each pixel point in the target image is smaller than the maximum brightness value of the display equipment;

and controlling the display screen to display images based on the target image.

In a third aspect, some embodiments of the present application provide an image processing apparatus, where the apparatus is applied to a display device, where the display device includes a display screen, and the apparatus includes:

the acquisition module is used for acquiring an image to be displayed;

the processing module is used for acquiring the maximum brightness value of the display equipment according to the image to be displayed; wherein the maximum brightness value is related to the brightness of the image to be displayed;

the adjusting module is used for adjusting the brightness of the image to be displayed according to the brightness value of each pixel point in the image to be displayed, the pixel value of each pixel point and the maximum brightness value of the display equipment to obtain a target image; the brightness value of each pixel point in the target image is smaller than the maximum brightness value of the display equipment;

and the control module is used for controlling the display screen to display images based on the target image.

In a fourth aspect, some embodiments of the present application provide a computer-readable storage medium having stored therein computer program instructions, which, when executed, implement the image processing method according to the second aspect.

In a fifth aspect, some embodiments of the present application provide a computer program product comprising a computer program that, when executed by a processor, implements the image processing method according to the second aspect.

According to the display device and the image processing method provided by the application, when the pixel point with the brightness value larger than the first preset brightness threshold exists in the image to be displayed, the display device can determine the maximum brightness value of the display device related to the brightness of the image to be displayed according to the image to be displayed. That is, with the above method, the maximum luminance value of the display device may be different for different images to be displayed, and the maximum luminance value is related to the luminance of the images to be displayed. After obtaining the maximum brightness value, the display device may adjust the brightness of the image to be displayed according to the maximum brightness, the brightness value of each pixel point of the image to be displayed, and the pixel value of each pixel point, so as to obtain the target image. By the method, aiming at different images to be displayed, the display equipment can adjust the brightness of the images to be displayed based on the maximum brightness value corresponding to the images to be displayed. Compared with the existing method for adjusting the brightness of all the images to be displayed based on the fixed maximum brightness value, the method provided by the application improves the accuracy of adjusting the brightness of the images to be displayed, reduces the possibility of overexposure or over darkness of the adjusted images to be displayed, and further improves the experience of a user watching the images to be displayed by using the display equipment.

Drawings

In order to more clearly illustrate the embodiments of the present application or the implementation manner in the related art, a brief description will be given below of the drawings required for the description of the embodiments or the related art, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art according to the drawings.

Fig. 1 is a schematic hardware configuration diagram of a display device provided in the present application;

fig. 2 is a schematic diagram of a software configuration in a display device 200 provided in the present application;

FIG. 3 is a diagram illustrating actual luminance and theoretical luminance of a display screen obtained by a conventional HDR image display method;

fig. 4 is a schematic flowchart of an image processing method provided in the present application;

fig. 5 is a schematic flowchart of a method for obtaining a maximum luminance value of a display device according to the present application;

FIG. 6 is a schematic flow chart of another image processing method provided in the present application;

fig. 7 is a schematic diagram illustrating a mapping relationship between an image APL and a maximum luminance value of a display device according to the present application;

fig. 8 is a schematic diagram of actual luminance and theoretical luminance of a display screen obtained by the image processing method provided by the present application;

fig. 9 is a schematic flowchart of an image processing apparatus according to the present application.

Detailed Description

To make the objects, embodiments and advantages of the present application clearer, the following description of exemplary embodiments of the present application will clearly and completely describe the exemplary embodiments of the present application with reference to the accompanying drawings in the exemplary embodiments of the present application, and it is to be understood that the described exemplary embodiments are only a part of the embodiments of the present application, and not all of the embodiments.

All other embodiments, which can be derived by a person skilled in the art from the exemplary embodiments described herein without making any inventive step, are intended to be within the scope of the claims appended hereto. In addition, while the disclosure herein has been presented in terms of one or more exemplary examples, it should be appreciated that aspects of the disclosure may be implemented solely as a complete embodiment.

It should be noted that the brief descriptions of the terms in the present application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of the present application. These terms should be understood in their ordinary and customary meaning unless otherwise indicated.

The terms "first," "second," "third," and the like in the description and claims of this application and in the above-described drawings are used for distinguishing between similar or analogous objects or entities and not necessarily for describing a particular sequential or chronological order, unless otherwise indicated. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein.

Furthermore, the terms "comprises" and "comprising," as well as any variations thereof, are intended to cover a non-exclusive inclusion, such that a product or device that comprises a list of elements is not necessarily limited to those elements explicitly listed, but may include other elements not expressly listed or inherent to such product or device.

The term "module" as used herein refers to any known or later developed hardware, software, firmware, artificial intelligence, fuzzy logic, or combination of hardware and/or software code that is capable of performing the functionality associated with that element.

The term "remote control" as used in this application refers to a component of an electronic device, such as the display device disclosed in this application, that is typically wirelessly controllable over a short range of distances. Typically using infrared and/or Radio Frequency (RF) signals and/or bluetooth to connect with the electronic device, and may also include WiFi, wireless USB, bluetooth, motion sensor, etc. For example: the hand-held touch remote controller replaces most of the physical built-in hard keys in the common remote control device with the user interface in the touch screen.

The term "gesture" as used in this application refers to a user's behavior through a change in hand shape or an action such as hand motion to convey a desired idea, action, purpose, or result.

For the SDR image and the LDR image, the range of brightness variation for the SDR image and the LDR image is 0-255 nits, for a total of 256 brightness levels. For HDR images, the range of luminance variation of HDR images can reach 0-10000 nits. For a frame of image, the larger the brightness variation range of different pixel points in the image is, the more detail content the image can show is, and the closer the image is to the actual scene. For example, if the same scene with strong light is shot, if an SDR image is obtained through SDR related technologies, the brightness values corresponding to the pixel points of the part with strong light in the SDR image may all be 255, so that the SDR image cannot represent the detail content of the part. If an HDR image is obtained by means of HDR related technology shooting, the luminance value corresponding to the pixel point of the portion with stronger light in the HDR image may be a luminance value matched with the actual luminance, and the detail content of the portion in the HDR image is still clearly visible.

The user needs to display the HDR image through the display screen of the display device before browsing the image. Fig. 1 is a schematic hardware configuration diagram of a display device provided in the present application. As shown in fig. 1, in some embodiments, at least one of the controller 250, the tuner demodulator 210, the communicator 220, the detector 230, the input/output interface 255 (i.e., the first interface 255 shown in fig. 1), the display 275, the audio output interface 285, the memory 260, the power supply 290, the user interface 265, and the external device interface 240 may be included in the display apparatus 200.

In some embodiments, the display 275 may include a display component for presenting a screen. In some embodiments, a drive assembly for driving the display is also included, depending on the type of display screen 275. In some embodiments, display screen 275 is a projection display screen and may also include a projection device and a projection screen.

In some embodiments, the display screen 275 may be configured to receive image signals from the first processor output and to display video content and images and components of the menu manipulation interface. In some embodiments, the display video content may be from broadcast television content, or may be various broadcast signals received via wired or wireless communication protocols. Alternatively, various image contents received from the network communication protocol and sent from the network server side can be displayed. In some embodiments, the display screen 275 may also be used to present a user-manipulated UI interface generated in the display device 200 and used to control the display device 200.

In some embodiments, the display panel of the display 275 may employ a Liquid Crystal Display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode (active-matrix organic light-emitting diode, AMOLED), a flexible light-emitting diode (FLED), miniature, micro-oeld, quantum dot light-emitting diodes (QLED), or the like. In some embodiments, the electronic device 100 may include 1 or N display screens 194, N being a positive integer greater than 1.

In some embodiments, communicator 220 is a component for communicating with external devices or external servers according to various communication protocol types. For example: the communicator may include at least one of a Wifi chip, a bluetooth communication protocol chip, a wired ethernet communication protocol chip, and other network communication protocol chips or near field communication protocol chips, and an infrared receiver.

In some embodiments, the display apparatus 200 may establish control signal and data signal transmission and reception with the external control apparatus 100 (i.e., the control device 100 shown in fig. 1) or the content providing apparatus through the communicator 220.

In some embodiments, user interface 265 may be configured to receive infrared control signals from control device 100 (e.g., an infrared remote control, etc.).

In some embodiments, the detector 230 is a signal used by the display device 200 to collect an external environment or interact with the outside.

In some embodiments, the detector 230 includes a light receiver, a sensor for collecting the intensity of ambient light, and parameters changes can be adaptively displayed by collecting the ambient light, and the like.

In some embodiments, the detector 230 may further include a sound collector 231 or the like, such as a microphone, which may be used to receive the user's voice. Illustratively, a voice signal including a control instruction of the user to control the display device 200, or to collect an ambient sound for recognizing an ambient scene type, so that the display device 200 can adaptively adapt to an ambient noise.

In some embodiments, the detector 230 may further include an image collector 232, such as a camera, a video camera, etc., which may be used to collect external environment scenes, collect attributes of the user or gestures interacted with the user, adaptively change display parameters, and also recognize the user gestures, so as to implement a function of interaction with the user.

In some embodiments, the detector 230 may also include a temperature sensor or the like, such as by sensing ambient temperature. In some embodiments, the display apparatus 200 may adaptively adjust a display color temperature of an image. For example, the display apparatus 200 may be adjusted to display a cool tone when the temperature is in a high environment, or the display apparatus 200 may be adjusted to display a warm tone when the temperature is in a low environment.

In some embodiments, as shown in fig. 1, the input/output interface 255 is configured to allow data transfer between the controller 250 and external other devices or other controllers 250. Such as receiving video signal data and audio signal data of an external device, or command instruction data, etc.

In some embodiments, the external device interface 240 may include, but is not limited to, the following: a High Definition Multimedia Interface (HDMI) 241, a Composite Video Broadcast Signal (CVBS) Interface 242, an analog or data High Definition component input Interface 243, a USB Interface 244, a Red Green Blue (RGB) port, and/or the like. The plurality of interfaces may form a composite input/output interface.

In some embodiments, as shown in fig. 1, the tuner demodulator 210 is configured to receive a broadcast television signal through a wired or wireless receiving manner, perform modem processing such as amplification, mixing and resonance, and demodulate an audio/video signal from a plurality of wireless or wired broadcast television signals, where the audio/video signal may include a television audio/video signal carried in a television channel frequency selected by a user and an Electronic Program Guide (EPG) data signal.

In some embodiments, the frequency points demodulated by the tuner demodulator 210 are controlled by the controller 250, and the controller 250 can send out control signals according to user selection, so that the modem responds to the television signal frequency selected by the user and modulates and demodulates the television signal carried by the frequency.

In some embodiments, the broadcast television signal may be classified into a terrestrial broadcast signal, a cable broadcast signal, a satellite broadcast signal, an internet broadcast signal, or the like according to the broadcasting system of the television signal. Or may be classified into a digital modulation signal, an analog modulation signal, and the like according to a modulation type. Or the signals are classified into digital signals, analog signals and the like according to the types of the signals.

In some embodiments, the controller 250 and the modem 210 may be located in different separate devices, that is, the modem 210 may also be located in an external device of the main device where the controller 250 is located, such as an external set-top box. Therefore, the set top box outputs the television audio and video signals modulated and demodulated by the received broadcast television signals to the main body equipment, and the main body equipment receives the audio and video signals through the first input/output interface.

In some embodiments, the controller 250 controls the operation of the display device and responds to user operations through various software control programs stored in memory. The controller 250 may control the overall operation of the display apparatus 200. For example: in response to receiving a user command for selecting a UI object displayed on the display 275, the controller 250 may perform an operation related to the object selected by the user command.

In some embodiments, the object may be any one of selectable objects, such as a hyperlink or an icon. Operations related to the selected object, such as: displaying an operation connected to a hyperlink page, document, image, or the like, or performing an operation of a program corresponding to the icon. The user command for selecting the UI object may be a command input through various input means (e.g., a mouse, a keyboard, a touch pad, etc.) connected to the display apparatus 200 or a voice command corresponding to a voice spoken by the user.

As shown in fig. 1, the controller 250 includes at least one of a Random Access Memory 251 (RAM), a Read-Only Memory 252 (ROM), a video processor 270, an audio processor 280, other processors 253 (e.g., a Graphics Processing Unit (GPU), a Central Processing Unit 254 (CPU), a Communication Interface (Communication Interface), and a Communication Bus 256 (Bus), which connects the respective components.

In some embodiments, RAM251 is used to store temporary data for the operating system or other programs that are running.

In some embodiments, ROM252 is used to store instructions for various system boots.

In some embodiments, the ROM252 is used to store a Basic Input Output System (BIOS). The system is used for completing power-on self-test of the system, initialization of each functional module in the system, a driver of basic input/output of the system and booting an operating system.

In some embodiments, when the power-on signal is received, the display device 200 starts to power up, the CPU executes the system boot instruction in the ROM252, and copies the temporary data of the operating system stored in the memory to the RAM251 so as to start or run the operating system. After the start of the operating system is completed, the CPU copies the temporary data of various application programs in the memory to the RAM 251. And then to facilitate launching or running various applications.

In some embodiments, CPU processor 254 is used to execute operating system and application program instructions stored in memory. And executing various application programs, data and contents according to various interactive instructions received from the outside so as to finally display and play various audio and video contents.

In some example embodiments, the CPU processor 254 may comprise a plurality of processors. The plurality of processors may include a main processor and one or more sub-processors. A main processor for performing some operations of the display apparatus 200 in a pre-power-up mode and/or operations of displaying a screen in a normal mode. One or more sub-processors for one operation in a standby mode or the like.

In some embodiments, the graphics processor 253 is used to generate various graphics objects, such as: icons, operation menus, user input instruction display graphics, and the like. The display device comprises an arithmetic unit which carries out operation by receiving various interactive instructions input by a user and displays various objects according to display attributes. And the system comprises a renderer for rendering various objects obtained based on the arithmetic unit, wherein the rendered objects are used for being displayed on a display screen.

In some embodiments, the video processor 270 is configured to receive an external video signal, and perform video processing such as decompression, decoding, scaling, noise reduction, frame rate conversion, resolution conversion, image synthesis, and the like according to a standard codec protocol of the input signal, so as to obtain a signal that can be displayed or played on the direct display device 200.

In some embodiments, video processor 270 includes a demultiplexing module, a video decoding module, an image synthesis module, a frame rate conversion module, a display formatting module, and the like.

The demultiplexing module is configured to demultiplex an input audio/video data stream, and if a Moving Picture Experts Group (mpeg-2) is input, the demultiplexing module demultiplexes the input audio/video data stream into a video signal and an audio signal.

And the video decoding module is used for processing the demultiplexed video signal, including decoding, scaling and the like.

And the image synthesis module is used for carrying out superposition mixing processing on the GUI signal input by the user or generated by the user and the video image after the zooming processing by the graphic generator so as to generate an image signal for display.

The frame rate conversion module is configured to convert an input video frame rate, such as a 60Hz frame rate into a 120Hz frame rate or a 240Hz frame rate, and the normal format is implemented in, for example, an interpolation frame mode.

The display format module is used for converting the received video output signal after the frame rate conversion, and changing the signal to conform to the signal of the display format, such as outputting an RGB data signal.

In some embodiments, the graphics processor 253 and the video processor may be integrated or separately configured, and when the graphics processor and the video processor are integrated, the graphics processor and the video processor may perform processing of graphics signals output to the display screen, and when the graphics processor and the video processor are separately configured, the graphics processor and the video processor may perform different functions, for example, GPU + FRC (FCR Frame rate conversion, which is called Frame rate conversion) architecture.

In some embodiments, the audio processor 280 is configured to receive an external audio signal, decompress and decode the received audio signal according to a standard codec protocol of the input signal, and perform noise reduction, digital-to-analog conversion, and amplification processes to obtain an audio signal that can be played in a speaker.

In some embodiments, video processor 270 may comprise one or more chips. The audio processor may also comprise one or more chips.

In some embodiments, the video processor 270 and the audio processor 280 may be separate chips or may be integrated with the controller in one or more chips.

In some embodiments, the audio output, under the control of controller 250, receives sound signals output by audio processor 280, such as: a speaker 286, and an external sound output terminal 287 which can be output to a generating device of an external device, in addition to a speaker carried by the display device 200 itself, such as: external sound interface or earphone interface, etc., and may also include a near field communication module in the communication interface, for example: and the Bluetooth module is used for outputting sound of the Bluetooth loudspeaker.

The power supply 290 supplies power to the display device 200 from the power input from the external power source under the control of the controller 250. The power supply 290 may include a built-in power supply circuit installed inside the display apparatus 200, or may be a power supply interface installed outside the display apparatus 200 to provide an external power supply in the display apparatus 200.

A user interface 265 for receiving an input signal of a user and then transmitting the received user input signal to the controller 250. The user input signal may be a remote controller signal received through an infrared receiver, and various user control signals may be received through the network communication module.

In some embodiments, the user inputs a user command through the control apparatus 100 or the mobile terminal 300, the user input interface responds to the user input through the controller 250 according to the user input, and the display device 200 responds to the user input through the controller 250.

In some embodiments, the user may enter user commands on a Graphical User Interface (GUI) displayed on the display screen 275, and the user input interface receives the user input commands through the Graphical User Interface (GUI). Alternatively, the user may input the user command by inputting a specific sound or gesture, and the user input interface receives the user input command by recognizing the sound or gesture through the sensor.

In some embodiments, a "user interface" is a media interface for interaction and information exchange between an application or operating system and a user that enables conversion between an internal form of information and a form that is acceptable to the user. A commonly used presentation form of the User Interface is a Graphical User Interface (GUI), which refers to a User Interface related to computer operations and displayed in a graphical manner. It may be an interface element such as an icon, a window, a control, etc. displayed in the display screen of the electronic device, where the control may include a visual interface element such as an icon, a button, a menu, a tab, a text box, a dialog box, a status bar, a navigation bar, a Widget (a plug-in application), etc.

The memory 260 includes a memory for storing various software modules for driving the display device 200. Such as: various software modules stored in the first memory, including: at least one of a basic module, a detection module, a communication module, a display control module, a browser module, and various service modules.

The base module is a bottom layer software module for signal communication between various hardware in the display device 200 and for sending processing and control signals to the upper layer module. The detection module is used for collecting various information from various sensors or user input interfaces, and the management module is used for performing digital-to-analog conversion and analysis management.

For example, the voice recognition module comprises a voice analysis module and a voice instruction database module. The display control module is used for controlling the display screen to display the image content, and can be used for playing the multimedia image content, UI interface and other information. And the communication module is used for carrying out control and data communication with external equipment. And the browser module is used for executing a module for data communication between browsing servers. And the service module is used for providing various services and modules including various application programs. Meanwhile, the memory 260 may store a visual effect map for receiving external data and user data, images of various items in various user interfaces, and a focus object, etc.

Fig. 2 is a schematic diagram of a software configuration in a display device 200 provided in the present application. As shown in fig. 2, in some embodiments, the system is divided into four layers, which are, from top to bottom, an Application (Applications) layer (referred to as "Application layer"), an Application Framework (Application Framework) layer (referred to as "Framework layer"), an Android runtime (Android runtime) and system library layer (referred to as "system runtime library layer"), and a kernel layer.

In some embodiments, at least one application program runs in the application program layer, and the application programs can be Window (Window) programs carried by an operating system, system setting programs, clock programs, camera applications and the like; or may be an application developed by a third party developer such as a hi program, a karaoke program, a magic mirror program, or the like. In specific implementation, the application packages in the application layer are not limited to the above examples, and may actually include other application packages, which is not limited in this embodiment of the present application.

The framework layer provides an Application Programming Interface (API) and a programming framework for the application program of the application layer. The application framework layer includes a number of predefined functions. The application framework layer acts as a processing center that decides to let the applications in the application layer act. The application program can access the resources in the system and obtain the services of the system in execution through the API interface.

As shown in fig. 2, the application framework layer in the embodiment of the present application includes a manager (Managers), a Content Provider (Content Provider), a View system (View system), and the like, where the manager includes at least one of the following modules: an Activity Manager (Activity Manager) is used for interacting with all activities running in the system; the Location Manager (Location Manager) is used for providing the system service or application with the access of the system Location service; a Package Manager (Package Manager) for retrieving various information related to an application Package currently installed on the device; a Notification Manager (Notification Manager) for controlling display and clearing of Notification messages; a Window Manager (Window Manager) is used to manage icons, windows, toolbars, wallpapers, and desktop components on a user interface.

In some embodiments, the activity manager is to: managing the life cycle of each application program and the general navigation backspacing function, such as controlling the exit of the application program (including switching the user interface currently displayed in the display window to the system desktop), opening, backing (including switching the user interface currently displayed in the display window to the previous user interface of the user interface currently displayed), and the like.

In some embodiments, the window manager is configured to manage all window processes, such as obtaining a display size, determining whether a status bar is available, locking a screen, intercepting a screen, controlling a display change (e.g., zooming out, dithering, distorting, etc.) and the like.

In some embodiments, the system runtime layer provides support for the upper layer, i.e., the framework layer, and when the framework layer is used, the android operating system runs the C/C + + library included in the system runtime layer to implement the functions to be implemented by the framework layer.

In some embodiments, the kernel layer is a layer between hardware and software. As shown in fig. 2, the core layer comprises at least one of the following drivers: audio drive, display drive, bluetooth drive, camera drive, WIFI drive, USB drive, HDMI drive, sensor drive (such as fingerprint sensor, temperature sensor, touch sensor, pressure sensor, etc.), and so on.

In some embodiments, the kernel layer further comprises a power driver module for power management.

In some embodiments, software programs and/or modules corresponding to the software architecture of FIG. 2 are stored in the memory shown in FIG. 1.

In some embodiments, taking the magic mirror application (photographing application) as an example, when the remote control receiving device receives a remote control input operation, a corresponding hardware interrupt is sent to the kernel layer. The kernel layer processes the input operation into an original input event (including information such as the value of the input operation, the timestamp of the input operation, etc.). The raw input events are stored at the kernel layer. The application program framework layer obtains an original input event from the kernel layer, identifies a control corresponding to the input event according to the current position of the focus and uses the input operation as a confirmation operation, the control corresponding to the confirmation operation is a control of a magic mirror application icon, the magic mirror application calls an interface of the application framework layer to start the magic mirror application, and then the kernel layer is called to start a camera driver, so that a static image or a video is captured through the camera.

In some embodiments, for a display device with a touch function, taking a split screen operation as an example, the display device receives an input operation (such as a split screen operation) that a user acts on a display screen, and the kernel layer may generate a corresponding input event according to the input operation and report the event to the application framework layer. The window mode (such as multi-window mode) corresponding to the input operation, the position and size of the window and the like are set by an activity manager of the application framework layer. And the window management of the application program framework layer draws a window according to the setting of the activity manager, then sends the drawn window data to the display driver of the kernel layer, and the display driver displays the corresponding application interface in different display areas of the display screen.

Currently, the brightness of the display screen 275 of the display device 200 does not typically exceed 1000nit. As mentioned above, the HDR image may have a luminance in the range of 0-10000nit. That is, in general, the display device may not be able to display luminance values represented in the HDR image.

In order to enable a display device to display an HDR image, a method of displaying an HDR image by an existing display device is as follows: the maximum brightness that can be achieved by the display screen of the display device is first taken as the specific brightness. And then, reducing the brightness value of the pixel point with the brightness value larger than the specific brightness in the HDR image to the brightness value smaller than the specific brightness according to a preset tone mapping algorithm to obtain the adjusted HDR image. The display device may then display the adjusted HDR image via the display screen.

In fact, taking a dynamic backlight display such as an OLED as an example, the brightness of the display may vary according to the brightness of the screen of the television. That is, the luminance that can be achieved by the display screen differs for HDR images that differ in luminance. However, the conventional method for displaying HDR images described above is to perform brightness adjustment on each HDR image based on the maximum brightness that can be achieved by the display screen. That is, the existing method of displaying HDR images is to perform brightness adjustment on different HDR images based on a certain constant brightness. Therefore, the above method tends to result in overexposure or over-darkening of the adjusted HDR image. That is, the existing method of displaying HDR images is less accurate.

Illustratively, fig. 3 is a schematic diagram of actual luminance and theoretical luminance of a display screen obtained by a conventional HDR image display method. As shown in fig. 3, based on the existing HDR image display method, different gray values are mapped, and the measured actual brightness of the display screen may be higher than the theoretical brightness. It should be understood that fig. 3 is only an exemplary illustration of the actual brightness being higher than the theoretical brightness, and the actual brightness of the display screen may also be lower than the theoretical brightness based on the existing HDR image display method.

Considering that the reason that the existing display HDR image is low in accuracy is that brightness adjustment is performed on different HDR images based on specific unchanged brightness, the present application provides a method for determining a maximum brightness value of a display device corresponding to an image to be displayed based on the image to be displayed, and then adjusting the image to be displayed based on the maximum brightness value. By the method, aiming at different images to be displayed, brightness adjustment can be carried out on the images to be displayed based on different maximum brightness values of the display equipment. Compared with the prior art that brightness adjustment can only be performed on different images to be displayed through specific values, the method and the device for adjusting the brightness of the images to be displayed improve the accuracy of brightness adjustment on the images to be displayed, and reduce the possibility of overexposure or over darkness of the adjusted images to be displayed.

In some embodiments, the image to be displayed may be an HDR, SDR, or the like image. Among them, the HDR image may be: HDR10 standard images, HDR10+ standard images, dolby standard images, hybrid Log Gamma (HLG) standard images, and the like.

The technical solution of the present application will be described in detail with reference to specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.

Fig. 4 is a schematic flowchart of an image processing method provided in the present application. As shown in fig. 4, the method comprises the steps of:

and S101, acquiring an image to be displayed.

The image to be displayed may be one image or any frame of image in a video stream.

Taking the image to be displayed as an image as an example, in some embodiments, the image to be displayed may be pre-stored in the display device. In this implementation manner, the display device may obtain the image to be displayed from a file stored in the display device in response to an operation of the user to view the image to be displayed. In some embodiments, the display device may further obtain the image to be displayed from another terminal or a server through wireless communication or wired transmission. In some embodiments, the display device may further obtain an image to be displayed, which is input by a user, for example, through an API interface or an image user interface.

Taking the image to be displayed as an arbitrary frame of image in the video stream as an example, in some embodiments, the display device may first obtain the video stream to be displayed, and then obtain the image to be displayed from the video stream to be displayed. In some embodiments, each frame of image in the video stream to be displayed may be referred to as an image to be displayed.

In this implementation manner, how the display device obtains the video stream to be displayed is not limited in the present application. For example, the display device may obtain the video stream to be displayed through a broadcast receiving television function, an intelligent network television function, or the like. The intelligent network Television includes, but is not limited to, a network Television, an intelligent Television, an Internet Protocol Television (IPTV), and the like.

In some embodiments, the display device may further obtain the image to be displayed from a video file pre-stored in the display device. Each frame of image in the video file can be used as an image to be displayed.

And S102, acquiring the maximum brightness value of the display equipment according to the image to be displayed.

The maximum brightness value of the display device is related to the brightness of the image to be displayed. In some embodiments, the display device may determine, according to the brightness value of each pixel point in the image to be displayed, the maximum brightness value of the display device corresponding to the image to be displayed.

As a possible implementation manner, before executing the step S102, the display device may further determine whether a pixel point whose luminance value is greater than a first preset luminance threshold exists in the image to be displayed. The first preset brightness threshold is smaller than or equal to the rated maximum brightness of the display device. In some embodiments, the first preset brightness threshold may be pre-stored by the user in the display device. The first preset brightness thresholds corresponding to different display devices may be the same or different.

If there is a pixel point whose luminance value is greater than the first preset luminance threshold in the image to be displayed, which indicates that the display device may not be able to display the actual luminance corresponding to the portion of the pixel point, the display device needs to adjust the image to be displayed, and then the display device may execute the step S102.

If no pixel point with the brightness value larger than the first preset brightness threshold value exists in the image to be displayed, it is indicated that the display device can display the actual brightness corresponding to any pixel point in the image to be displayed. In some embodiments, the display device may directly display the image to be displayed to improve the efficiency of the display device in displaying the image to be displayed.

As another possible implementation manner, the display device may further determine whether to execute step S102 according to a determination result of "determining whether the display device has the dynamic image brightness adjustment function turned on". If the display device has the function of dynamically adjusting the image brightness, the display device executes the step S102 to improve the user experience.

It should be understood that the present application does not limit how the display device turns on the function of dynamically adjusting the image brightness. In some embodiments, the display device may turn on the dynamic image brightness adjustment function, for example, in response to a user operation to turn on the dynamic image brightness adjustment function.

Alternatively, the display device may determine whether to turn on the function of dynamically adjusting the image brightness, for example, according to the analysis result of "analyzing the historical behavior data of the user viewing the video or image". In this implementation manner, it should be understood that the present application is not limited to how the display device obtains the analysis result of "analyzing the historical behavior data of the user watching the video or image". Illustratively, the display device may obtain the analysis result from the server through wireless communication. Or, the display device may further obtain the analysis result according to an analysis algorithm stored in the display device by the user and historical behavior data of the video or image watched by the user. The analysis algorithm is used for obtaining an analysis result of analyzing historical behavior data of the user watching the video or the image according to the historical behavior data of the user watching the video or the image.

In some embodiments, if the analysis result of "analyzing the historical behavior data of the video or image watched by the user" indicates that the user prefers an image with a higher dynamic range, it is determined that the function of dynamically adjusting the image brightness is turned on. And if the analysis result of analyzing the historical behavior data of the video or image watched by the user represents that the user preference is the image with a higher dynamic range, determining not to start the function of dynamically adjusting the image brightness.

If the display device does not start the function of dynamically adjusting the image brightness, in some embodiments, the display device may display the image to be displayed by referring to any existing method for displaying an image after acquiring the image to be displayed. This application is not described in detail herein.

As another possible implementation manner, the display device may not determine whether the display device has the function of dynamically adjusting the image brightness. In some embodiments, after acquiring the image to be displayed, the display device may directly perform this step S102.

S103, adjusting the brightness of the image to be displayed according to the brightness value of each pixel point in the image to be displayed, the pixel value of each pixel point and the maximum brightness value of the display equipment to obtain a target image.

And the brightness value of each pixel point in the target image is smaller than the maximum brightness value of the display equipment.

As a possible implementation manner, after obtaining the maximum brightness value of the display device corresponding to the image to be displayed, the display device may input the brightness value of each pixel in the image to be displayed and the maximum brightness value of the display device into a preset Tone mapping (Tone mapping) algorithm to obtain a mapping brightness value of each pixel in the image to be displayed.

For example, the preset tone mapping algorithm may be a global tone mapping algorithm or a local tone mapping algorithm. The global tone mapping algorithm is a method that the same mapping function is adopted for any pixel point in the whole image of the image to be displayed. The local tone mapping algorithm refers to adjusting the brightness value of each pixel point in the image to be displayed, and adjusting the gray value of each pixel point according to the position of each pixel point in the image to be displayed. Illustratively, the tone mapping algorithm may be, for example, a Gamma (Gamma) correction algorithm, a logarithmic correction algorithm, a histogram normalization algorithm, a piecewise gray scale conversion algorithm, or the like.

Then, the display device may reduce, according to the mapping brightness value of each pixel point in the image to be displayed, the brightness value of the pixel point in the image to be displayed, which is greater than the first preset brightness threshold, to obtain the target image. In some embodiments, the display device may replace, by the display device, the luminance value of a pixel point in the image to be displayed, which is greater than the maximum luminance value of the display device, with a mapping luminance value corresponding to the pixel point, so as to obtain the target image.

As another possible implementation manner, after the brightness of the image to be displayed is adjusted according to the brightness value of each pixel point in the image to be displayed, the pixel value of each pixel point, and the maximum brightness value of the display device, the display device may further adjust the brightness of the adjusted image to be displayed according to the brightness value of the current environment where the display device is located, for example, to obtain the target image. By the method, the brightness of the target image displayed by the display equipment is more consistent with the ambient brightness, and the user experience is improved.

In some embodiments, the brightness sensor may be configured to collect a brightness value of an environment in which the display device is located. In some embodiments, the higher the brightness of the environment in which the display device is located, the higher the brightness value corresponding to each pixel point in the image to be displayed can be adjusted by the display device. The lower the brightness of the environment where the display device is located, the lower the brightness value corresponding to each pixel point in the image to be displayed can be adjusted by the display device.

And S104, controlling the display screen to display the image based on the target image.

In some embodiments, after acquiring the target image, the display device may determine a decoding function for decoding the target image according to the type of the target image. The display device may then decode the target image using the decoding function to obtain image data of the target image that the display screen is capable of displaying. Then, the display device may transmit the decoded target image to a display screen, and then control the display screen to perform image display.

In some embodiments, the display device may send the target image to a display screen for display. Alternatively, the display device may further perform preset image processing based on the target image to obtain a processed target image. And then the display device sends the processed target image to a display screen for displaying. It should be understood that the preset image processing method is not limited in the present application, and may be determined according to a user requirement, for example.

Taking the type of the target image as an HDR image as an example, the decoding function for decoding the target image may be an Electro-optical transfer function (EOTF) corresponding to the SMPTE2084 standard, for example. Taking the type of the target image as an SDR image as an example, the decoding function for decoding the target image may be, for example, EOTF corresponding to GAMMA2.2 standard or GAMMA2.4 standard.

In this embodiment, when there is a pixel point whose luminance value is greater than a first preset luminance threshold value in an image to be displayed, the display device may determine, according to the image to be displayed, a maximum luminance value of the display device related to the luminance of the image to be displayed. That is, with the above method, the maximum luminance value of the display device may be different for different images to be displayed, and the maximum luminance value is related to the luminance of the images to be displayed. After obtaining the maximum brightness value, the display device may adjust the brightness of the image to be displayed according to the maximum brightness, the brightness value of each pixel point of the image to be displayed, and the pixel value of each pixel point, so as to obtain the target image. By the method, aiming at different images to be displayed, the display equipment can adjust the brightness of the images to be displayed based on the maximum brightness value corresponding to the images to be displayed. Compared with the existing method for adjusting the brightness of all the images to be displayed based on the fixed maximum brightness value, the method provided by the application improves the accuracy of adjusting the brightness of the images to be displayed, reduces the possibility of overexposure or over darkness of the adjusted images to be displayed, and further improves the experience of a user watching the images to be displayed by using the display equipment.

The following describes how the display device 200 obtains the maximum brightness value of the display device according to the image to be displayed. Fig. 5 is a flowchart illustrating a method for obtaining a maximum luminance value of a display device according to the present application. As a possible implementation manner, as shown in fig. 5, the above S102 may include the following steps:

s201, acquiring target parameter information of the image to be displayed according to the image to be displayed.

Wherein the target parameter is related to the brightness of the image to be displayed. In some embodiments, the target parameter may be, for example, an average image level (APL) of the image to be processed, or a gray histogram of the image to be processed, or the like.

The target parameter information comprises: in some embodiments, the display device may obtain the APL of the image to be displayed according to the brightness value of each pixel point in the image to be displayed. In specific implementation, how to acquire the APL of the image to be displayed by the display device according to the brightness value of each pixel point in the image to be displayed may refer to the existing method for acquiring the APL of the image, which is not described herein again.

The target parameter information comprises: for example, in some embodiments, the display device may obtain the gray level histogram of the image to be displayed according to the pixel value of each pixel point in the image to be displayed. In some embodiments, the display device may first convert the pixel value of each pixel point in the image to be displayed into a pixel value corresponding to the gray scale map. And then calculating the occurrence probability of each pixel value in the converted gray-scale image to obtain a gray-scale histogram corresponding to the image to be displayed.

S202, acquiring the maximum brightness value of the display equipment according to the image to be displayed and the mapping relation between the target parameter information and the maximum brightness value.

The target parameter information comprises: for example, the average image level of the image to be processed may include: the image average image level is mapped to the maximum luminance value of the display device. Wherein the maximum luminance value is inversely related to the average luminance value. It should be understood that the present application does not limit the step size between the average image level values in the above mapping relationship. For example, the step size between the average image level values may be determined by a user according to the difference size of the maximum brightness values of the display device.

For example, the mapping relationship between the average image level and the maximum brightness value of the display device may be as shown in table 1:

TABLE 1

Taking the content shown in table 1 as an example, assuming that the display device determines an average image level 3 of the average image levels of the images to be displayed, according to the mapping relationship shown in table 1, the display device may determine that the maximum brightness value of the display device corresponding to the image to be displayed is a brightness value 3.

The target parameter information comprises: for example, the grayscale histogram of the image to be processed may include: and mapping relation between the image gray level histogram and the maximum brightness value.

In this implementation, after acquiring the gray level histogram of the image to be processed, the display device may match an image gray level histogram with the highest similarity to the gray level histogram of the image to be processed from the "mapping relationship between the image gray level histogram and the maximum brightness value". And then determining the maximum brightness value of the display equipment corresponding to the image to be processed according to the image gray level histogram with the highest similarity to the gray level histogram of the image to be processed and the mapping relation between the image gray level histogram and the maximum brightness value.

In this embodiment, the display device may obtain a target parameter related to brightness of the image to be displayed according to the image to be displayed. Through the target parameter and the mapping relation between the target parameter information and the maximum brightness value, the display device can determine the maximum brightness value of the display device corresponding to the image to be displayed. The above target parameter is a parameter related to the luminance of the image to be displayed, that is, the maximum luminance value of the display device determined by the above method is related to the luminance of the image to be displayed. The brightness of the image to be displayed is adjusted through the maximum brightness value related to the brightness of the image to be displayed, so that the accuracy of brightness adjustment of the image to be displayed is improved, and the accuracy of the display device for displaying the image to be displayed is further improved.

Furthermore, in some embodiments, considering that factors such as brightness reduction of the display screen due to aging of the display screen of the display device may exist, the display device may further update the mapping relationship between the target parameter information and the maximum brightness value, so as to further improve the accuracy of the display device for displaying the brightness of the image to be displayed, and further improve user experience.

As a possible implementation manner, after receiving an update instruction including an updated mapping relationship between the target parameter information and the maximum brightness value, the display device may replace the mapping relationship between the target parameter information and the maximum brightness value with the updated mapping relationship between the target parameter information and the maximum brightness value, so as to update the mapping relationship between the target parameter information and the maximum brightness value. In some embodiments, the display device may receive the above-mentioned update instruction sent by the server, for example.

As a possible implementation manner, the display device may further send, to the server, request information for requesting to update the mapping relationship between the target parameter information and the maximum brightness value according to a preset period. Alternatively, the display device may further transmit request information for requesting updating of the mapping relationship of the target parameter information and the maximum luminance value to the server in response to a user starting an operation of updating the mapping relationship of the target parameter information and the maximum luminance value.

After receiving the request information, the server may determine whether the mapping relationship between the current target parameter information and the maximum brightness value in the display device needs to be updated. And if the server determines that the display equipment needs to update the mapping relation between the target parameter information and the maximum brightness value, sending the updated mapping relation between the target parameter information and the maximum brightness value to the display equipment. If the server determines that the display device does not need to update the mapping relationship between the target parameter information and the maximum brightness value, for example, the server may feed back, to the display device, indication information indicating that the mapping relationship in the display device is the latest mapping relationship.

Correspondingly, the display device may receive the mapping relationship between the updated target parameter information and the maximum brightness value sent by the server, and use the updated mapping relationship to replace the mapping relationship between the current target parameter information and the maximum brightness value, so as to update the mapping relationship between the target parameter information and the maximum brightness value.

Based on the methods provided in the foregoing embodiments, taking an image to be displayed as an HDR image as an example, fig. 6 is a schematic flow diagram of another image processing method provided in the present application. As shown in fig. 6, the method comprises the steps of:

s301, video stream to be displayed is obtained. And each frame of image in the video stream to be displayed is an image to be displayed.

S302, whether pixel points with brightness values larger than a first preset brightness threshold exist in the image to be displayed or not is judged. If so, the display device may execute steps S303 to S306 to adjust the brightness of the image to be displayed, so as to improve the accuracy of displaying the image to be displayed, and further improve the user experience. If not, the display device may use the image to be displayed as a target image, and then execute step S307 to display the image to be displayed, thereby improving the efficiency of displaying the image to be displayed.

S303, aiming at each frame of image to be displayed in the video stream to be displayed, and according to the brightness value of each pixel point in the image to be displayed, obtaining the APL of the frame of image to be displayed.

S304, acquiring the maximum brightness value of the display device corresponding to the frame of image to be displayed according to the APL of the image to be displayed and the mapping relation between the APL of the image and the maximum brightness value of the display device.

Taking the step size between the average image level values in the mapping relationship of the image APL and the maximum luminance value of the display device as an example of 10%, table 2 is an example of the mapping relationship of the image APL and the maximum luminance value of the display device:

TABLE 2

In some embodiments, the mapping relationship of the image APL and the maximum luminance value of the display device may also be stored in the display device in the form of a trend graph. Taking the data shown in table 2 as an example, fig. 7 is a schematic diagram of a mapping relationship between an image APL and a maximum luminance value of a display device provided in the present application.

S305, inputting the brightness value of each pixel point in the image to be displayed and the maximum brightness value of the display equipment into a preset tone mapping algorithm to obtain the mapping brightness value of each pixel point in the image to be displayed.

S306, replacing the brightness value of the pixel point which is larger than the first preset brightness threshold value in the image to be displayed with the mapping brightness value corresponding to the pixel point to obtain the target image.

S307, decoding the target image by using the EOTF corresponding to the SMPTE2084 standard, and displaying the target image on a display screen.

For example, fig. 8 is a schematic diagram of actual luminance and theoretical luminance of a display screen obtained by the image processing method provided by the present application. As shown in fig. 8, based on the image processing method provided by the present application, different gray values are mapped, and the measured actual brightness of the display screen matches with the theoretical brightness. The part of the display where the actual luminance is lower than the theoretical luminance is the display result obtained based on the SMPTE2084 standard.

In this embodiment, after the video stream to be displayed is obtained, the display device may obtain the APL of the image to be displayed when a pixel point whose luminance value is greater than a first preset luminance threshold exists in the image to be displayed in the video stream to be displayed. And then, acquiring the maximum brightness value of the display device corresponding to the frame of image to be displayed according to the APL of the image to be displayed and the mapping relation between the APL of the image and the maximum brightness value of the display device. When the brightness performance of the display device is tested, the brightness performance of the display device is tested through images of different APLs, so that the maximum brightness value is determined through the APL of the image to be displayed, and the accuracy of the brightness performance test of the display device is improved. After the maximum brightness corresponding to the image to be displayed is determined, the display device can adjust the brightness of the image to be displayed based on the maximum brightness corresponding to the image to be displayed, so that the accuracy of adjusting the brightness of the image to be displayed is improved, the accuracy of adjusting the brightness of the video stream to be displayed is further improved, and the user experience of the display device is further improved.

Fig. 9 is a schematic flowchart of an image processing apparatus according to the present application. As shown in fig. 9, the apparatus includes: an acquisition module 41, a processing module 42, an adjustment module 43, and a control module 44. Wherein the content of the first and second substances,

an obtaining module 41, configured to obtain an image to be displayed.

And the processing module 42 is configured to obtain a maximum brightness value of the display device according to the image to be displayed. Wherein the maximum brightness value is related to the brightness of the image to be displayed.

And an adjusting module 43, configured to adjust the brightness of the image to be displayed according to the brightness value of each pixel point in the image to be displayed, the pixel value of each pixel point, and the maximum brightness value of the display device, so as to obtain a target image. And the brightness value of each pixel point in the target image is smaller than the maximum brightness value of the display equipment.

And the control module 44 is used for controlling the display screen to display images based on the target images.

In some embodiments, the processing module 42 is specifically configured to obtain target parameter information of the image to be displayed according to the image to be displayed; and acquiring the maximum brightness value of the display equipment according to the image to be displayed and the mapping relation between the target parameter information and the maximum brightness value. Wherein the target parameter is related to the brightness of the image to be displayed.

In some embodiments, the target parameter information includes: taking the average brightness value as an example, the mapping relationship includes: and the mapping relation between the average brightness value of the image and the maximum brightness value of the display device. Wherein the maximum brightness value is positively correlated with the average brightness value. In this implementation manner, the processing module 42 is specifically configured to obtain an average brightness value of the image to be displayed according to the brightness value of each pixel point in the image to be displayed.

In some embodiments, the target parameter information includes: taking a gray histogram as an example, the mapping relationship includes: and mapping relation between the image gray level histogram and the maximum brightness value. In this implementation manner, the processing module 42 is specifically configured to obtain a gray level histogram of the image to be displayed according to a pixel value of each pixel point in the image to be displayed.

In some embodiments, the processing module 42 is further configured to receive an update instruction. Wherein the update instruction comprises: and the updated mapping relation between the target parameter information and the maximum brightness value. In this implementation, the processing module 42 is further configured to replace the mapping relationship between the target parameter information and the maximum brightness value with the updated mapping relationship between the target parameter information and the maximum brightness value.

In some embodiments, the adjusting module 43 is specifically configured to input the brightness value of each pixel in the image to be displayed and the maximum brightness value of the display device into a preset tone mapping algorithm to obtain a mapping brightness value of each pixel in the image to be displayed; and according to the mapping brightness value of each pixel point in the image to be displayed, reducing the brightness value of the pixel point which is larger than the first preset brightness threshold value in the image to be displayed to obtain the target image.

In some embodiments, the processing module 42 is specifically configured to, when the display device starts a function of dynamically adjusting image brightness, and a pixel point whose brightness value is greater than a first preset brightness threshold exists in the image to be displayed, obtain a maximum brightness value of the display device according to the image to be displayed.

In some embodiments, the obtaining module 41 is specifically configured to obtain a video stream to be displayed; and acquiring the image to be displayed from the video stream to be displayed.

In some embodiments, the processing module 42 is further configured to determine whether a pixel point with a luminance value greater than a first preset luminance threshold exists in the image to be displayed; and when the pixel points with the brightness values larger than a first preset brightness threshold value exist in the image to be displayed, acquiring the maximum brightness value of the display equipment according to the image to be displayed.

The image processing apparatus provided in the present application is configured to execute the foregoing image processing method embodiment, and the implementation principle and the technical effect are similar, which are not described again.

The present application also provides a computer-readable storage medium, which may include: various media that can store program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and in particular, the computer readable storage medium stores program instructions, and the program instructions are used for the method in the foregoing embodiments.

The present application also provides a program product comprising execution instructions stored in a readable storage medium. The at least one processor of the electronic device may read the execution instructions from the readable storage medium, and the execution of the execution instructions by the at least one processor causes the electronic device to implement the method for constructing the core free oil saturation prediction model or predicting the core free oil saturation provided by the various embodiments described above.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not depart from the scope of the technical solutions of the embodiments of the present application.

The foregoing description, for purposes of explanation, has been presented in conjunction with specific embodiments. However, the illustrative discussions above are not intended to be exhaustive or to limit the embodiments to the precise forms disclosed above. Many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles and the practical application, to thereby enable others skilled in the art to best utilize the embodiments and various embodiments with various modifications as are suited to the particular use contemplated.

Claims (10)

1. A display device, comprising:

a display screen for displaying an image;

a processor coupled to the display screen, the processor configured to:

acquiring an image to be displayed;

acquiring the maximum brightness value of the display equipment according to the image to be displayed; wherein the maximum brightness value is related to the brightness of the image to be displayed;

adjusting the brightness of the image to be displayed according to the brightness value of each pixel point in the image to be displayed, the pixel value of each pixel point and the maximum brightness value of the display equipment to obtain a target image; the brightness value of each pixel point in the target image is smaller than the maximum brightness value of the display equipment;

and controlling the display screen to display the image based on the target image.

2. The display device of claim 1, wherein the processor is configured to:

acquiring target parameter information of the image to be displayed according to the image to be displayed; the target parameter is related to the brightness of the image to be displayed;

and acquiring the maximum brightness value of the display equipment according to the image to be displayed and the mapping relation between the target parameter information and the maximum brightness value.

3. The display device according to claim 2, wherein the target parameter information includes: average picture level; the mapping relationship comprises: a mapping of the average image level of the image to a maximum luminance value of the display device; the maximum luminance value is inversely related to the average picture level;

the processor is configured to:

and acquiring the average image level of the image to be displayed according to the brightness value of each pixel point in the image to be displayed.

4. The display device according to claim 2, wherein the target parameter information includes: a gray level histogram; the mapping relationship comprises: mapping relation between the image gray level histogram and the maximum brightness value of the display equipment;

the processor is configured to:

and acquiring a gray level histogram of the image to be displayed according to the pixel value of each pixel point in the image to be displayed.

5. The display device according to any one of claims 2-4, wherein the processor is configured to:

receiving an update instruction, the update instruction comprising: the updated mapping relation between the target parameter information and the maximum brightness value;

and replacing the mapping relation between the target parameter information and the maximum brightness value by using the updated mapping relation between the target parameter information and the maximum brightness value.

6. The display device according to any one of claims 1-4, wherein the processor is configured to:

judging whether pixel points with brightness values larger than a first preset brightness threshold exist in the image to be displayed;

if the pixel point with the brightness value larger than a first preset brightness threshold value exists in the image to be displayed, the maximum brightness value of the display equipment is obtained according to the image to be displayed.

7. The display device of claim 6, wherein the processor is configured to:

inputting the brightness value of each pixel point in the image to be displayed and the maximum brightness value of the display equipment into a preset tone mapping algorithm to obtain the mapping brightness value of each pixel point in the image to be displayed;

and according to the mapping brightness value of each pixel point in the image to be displayed, reducing the brightness value of the pixel point which is larger than the first preset brightness threshold value in the image to be displayed to obtain the target image.

8. The display device according to any one of claims 1-4, wherein the processor is configured to:

and if the display equipment starts a function of dynamically adjusting the image brightness, acquiring the maximum brightness value of the display equipment according to the image to be displayed.

9. The display device according to any one of claims 1-4, wherein the processor is configured to:

acquiring a video stream to be displayed;

and acquiring the image to be displayed from the video stream to be displayed.

10. An image processing method, applied to a display device including a display screen, the method comprising:

acquiring an image to be displayed;

acquiring the maximum brightness value of the display equipment according to the image to be displayed; wherein the maximum brightness value is related to the brightness of the image to be displayed;

adjusting the brightness of the image to be displayed according to the brightness value of each pixel point in the image to be displayed, the pixel value of each pixel point and the maximum brightness value of the display equipment to obtain a target image; the brightness value of each pixel point in the target image is smaller than the maximum brightness value of the display equipment;

and controlling the display screen to display images based on the target image.

Images