CN114913822B - Display device, backlight adjusting method and storage medium - Google Patents
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
- G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
- G09G3/3426—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines the different display panel areas being distributed in two dimensions, e.g. matrix
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—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 using liquid crystals
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
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Abstract
The application provides display equipment, a backlight adjusting method and a storage medium, and relates to the technical field of display. After the display device divides the first image to be displayed into a plurality of image areas according to the number of backlight partitions and determines the motion vector of each image area, the backlight brightness value of each image area can be determined according to the motion vector of each image area and the brightness of each pixel point in the second image, and then the backlight brightness of the backlight partition corresponding to each image area is adjusted according to the backlight brightness value of each image area. By the method, the front frame image and the rear frame image can be more coherent, and the display effect of the picture is improved.
Description
Technical Field
The present application relates to the field of display technologies, and in particular, to a display device, a backlight adjustment method, and a storage medium.
Background
With the continuous development of science and technology, high dynamic range displays with bright and bright colors are favored and touted by more and more people. However, in the use process of the high dynamic range display, when the current frame image is converted to the next frame image, the connection between the front frame image and the rear frame image is not consistent due to the large difference of the backlight brightness between the front frame image and the rear frame image, so that the display effect of the picture is affected.
Therefore, how to improve the display effect of the picture and make the front and back frame images more coherent becomes a problem to be solved urgently.
Disclosure of Invention
In order to solve the problems in the prior art, embodiments of the present application provide a display device, a backlight adjustment method, and a storage medium, which can effectively improve the display effect of a picture and make the front and rear frame images more coherent.
In a first aspect, an embodiment of the present application provides a display device, including a processor, a display panel, and a backlight module located at a back surface of the display panel;
The display panel is used for displaying images;
the backlight module is used for providing backlight for the display panel and comprises a plurality of backlight partitions;
The processor is configured to:
dividing a first image to be displayed into a plurality of image areas according to the number of backlight partitions contained in the backlight module, and determining a motion vector of each image area; each image area corresponds to a backlight partition;
Respectively determining a backlight brightness value of each image area according to the motion vector of each image area and the brightness of each pixel point in the second image; the second image is the next frame image of the first image;
and adjusting the backlight brightness of the backlight subarea corresponding to each image area according to the backlight brightness value of each image area.
In a possible embodiment, the processor is specifically configured to:
According to the motion vector of each image area, respectively determining a corresponding target moving area of each image area in the second image;
And respectively determining the backlight brightness value of each image area according to the brightness of each pixel point of each image area in the corresponding target moving area in the second image.
In a possible implementation, the number of backlight partitions is K, and the processor is further configured to:
Dividing the first image into L image blocks, and determining the image blocks contained in each image area; l is a positive integer greater than K;
Determining a motion vector of the first image region by; the first image area is any one of K image areas:
Determining a motion vector of each image block contained in the first image area;
and determining the motion vector of the first image area according to the motion vector of each image block.
In a possible implementation manner, if the motion vectors of the image blocks included in the first image area are inconsistent, the motion vectors of the first image area include a first motion vector and a second motion vector; the first motion vector is determined from motion vectors of respective image blocks in the first image set; the second motion vector is determined from the motion vectors of the image blocks in the second image set; the first image set is the same moving image set with the largest number of image blocks; the second image set is a same-motion image set containing a plurality of image blocks; the same moving image set contains image blocks having the same motion vector in the first image region.
In a possible embodiment, the processor is specifically configured to determine the corresponding target movement area of the first image area in the second image by:
Determining a first moving area corresponding to the first image area in the second image according to the first motion vector, and determining a second moving area corresponding to the first image area in the second image according to the second motion vector;
respectively determining gray values of the first moving area and the second moving area;
and determining a target moving area corresponding to the first image area in the second image according to the gray values of the first moving area and the second moving area.
In a possible embodiment, the processor is specifically configured to:
respectively determining a first gray level difference value between the gray level value of the first moving area and a target gray level value and a second gray level difference value between the gray level value of the second moving area and the target gray level value; the target gray value is the gray value of the first image area;
if the first gray level difference value is smaller than the second gray level difference value, the first moving area is used as a target moving area; or alternatively
And if the second gray level difference value is smaller than the first gray level difference value, taking the second moving area as a target moving area.
In a possible embodiment, the processor is specifically configured to determine the motion vector of the first image block by; the first image block is any one of the image blocks contained in the first image area:
Acquiring image features of the first image block;
according to the image characteristics of the first image block, finding a matched image block of the first image block in a third image; the third image is the previous frame image of the first image;
and determining a motion vector of the first image block according to the position of the matching image block in the third image and the position of the first image block in the first image.
In one possible implementation, the motion vector of the first image block includes a displacement direction of the first image block and a displacement size of the first image block.
In a second aspect, an embodiment of the present application provides a backlight adjustment method, including:
dividing a first image to be displayed into a plurality of image areas according to the number of backlight partitions, and determining a motion vector of each image area; each image area corresponds to a backlight partition;
Respectively determining a backlight brightness value of each image area according to the motion vector of each image area and the brightness of each pixel point in the second image; the second image is the next frame image of the first image;
and adjusting the backlight brightness of the backlight subarea corresponding to each image area according to the backlight brightness value of each image area.
In a third aspect, an embodiment of the present application provides a backlight adjustment apparatus, including:
a first determination unit that divides a first image to be displayed into a plurality of image areas according to the number of backlight partitions, and determines a motion vector of each image area; each image area corresponds to a backlight partition;
a second determining unit for determining backlight brightness value of each image area according to the motion vector of each image area and brightness of each pixel point in the second image; the second image is the next frame image of the first image;
and the adjusting unit is used for adjusting the backlight brightness of the backlight subarea corresponding to each image area according to the backlight brightness value of each image area.
In a fourth aspect, embodiments of the present application provide a computer readable storage medium having a computer program stored therein, which when executed by a processor, implements the method of the second aspect.
According to the display device, the backlight adjusting method and the storage medium, after the display device divides the first image to be displayed into a plurality of image areas according to the number of backlight partitions and determines the motion vector of each image area, the backlight brightness value of each image area can be determined according to the motion vector of each image area and the brightness of each pixel point in the second image, and then the backlight brightness of the backlight partition corresponding to each image area is adjusted according to the backlight brightness value of each image area. By the method, the front frame image and the rear frame image can be more coherent, and the display effect of the picture is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it will be apparent that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of an operation scenario of a backlight adjustment method according to an embodiment of the present application;
fig. 2 is a block diagram of a control device according to an embodiment of the present application;
fig. 3 is a hardware configuration block diagram of a display device according to an embodiment of the present application;
Fig. 4 is a schematic software configuration diagram of a display device according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a display according to an embodiment of the present application;
Fig. 6 is a schematic structural diagram of a backlight module according to an embodiment of the present application;
fig. 7 is a schematic flow chart of a backlight adjustment method according to an embodiment of the present application;
FIG. 8 is a schematic diagram of dividing a first image according to an embodiment of the present application;
FIG. 9 is a schematic flow chart of determining a motion vector of an image region according to an embodiment of the present application;
Fig. 10 is a schematic diagram of an image block in an image area according to an embodiment of the present application;
FIG. 11 is a schematic flow chart of determining motion vectors of image blocks according to an embodiment of the present application;
Fig. 12 is a schematic diagram of a position of an image block in a third image according to an embodiment of the present application;
Fig. 13 is a schematic diagram of a position of an image block in a first image according to an embodiment of the present application;
FIG. 14 is a schematic view of an image area according to an embodiment of the present application;
FIG. 15 is a schematic view of another image area according to an embodiment of the present application;
FIG. 16 is a schematic view of another image area according to an embodiment of the present application;
fig. 17 is a schematic flow chart of determining a target moving area according to an embodiment of the present application;
fig. 18 is a schematic flow chart of determining a target moving area according to an embodiment of the present application;
FIG. 19 is a block diagram of a backlight adjusting device according to an embodiment of the present application;
fig. 20 is a block diagram of a backlight adjusting device according to an embodiment of the present application.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a further description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus a repetitive description thereof will be omitted. The words expressing the positions and directions described in the present invention are described by taking the drawings as an example, but can be changed according to the needs, and all the changes are included in the protection scope of the present invention. The drawings of the present invention are merely schematic representations of relative positional relationships and are not intended to represent true proportions.
With the continuous development of science and technology, high dynamic range displays with bright and bright colors are favored and touted by more and more people. However, in the use process of the high dynamic range display, when the current frame image is converted to the next frame image, the connection between the front frame image and the rear frame image is not consistent due to the large difference of the backlight brightness between the front frame image and the rear frame image, so that the display effect of the picture is affected. Therefore, how to improve the display effect of the picture and make the front and back frame images more coherent becomes a problem to be solved urgently.
In view of this, an embodiment of the present invention provides a display device, where after a first image to be displayed is divided into a plurality of image areas according to the number of backlight partitions, and a motion vector of each image area is determined, a backlight brightness value of each image area may be determined according to the motion vector of each image area and brightness of each pixel point in a second image, and then backlight brightness of a backlight partition corresponding to each image area is adjusted according to the backlight brightness value of each image area. By the method, the front frame image and the rear frame image can be more coherent, and the display effect of the picture is improved.
Fig. 1 is a schematic view of an operation scenario according to an embodiment of the present application, and as shown in fig. 1, a user may operate the display device 200 through the mobile terminal 300 and the control apparatus 100. The control apparatus 100 may be a remote control, and the communication between the remote control and the display device includes infrared protocol communication, bluetooth protocol communication, and wireless or other wired manner to control the display device 200. The user may control the display device 200 by inputting user instructions through keys on a remote control, voice input, control panel input, etc. In some embodiments, mobile terminals, tablet computers, notebook computers, and other smart devices may also be used to control the display device 200.
In some embodiments, the mobile terminal 300 may install a software application with the display device 200, implement connection communication through a network communication protocol, and achieve the purpose of one-to-one control operation and data communication. The audio/video content displayed on the mobile terminal 300 may also be transmitted to the display device 200, so that the display device 200 may also perform data communication with the server 400 through various communication modes. The display device 200 may be permitted to make communication connections via a Local Area Network (LAN), a Wireless Local Area Network (WLAN), and other networks. The server 400 may provide various contents and interactions to the display device 200. The display device 200 may be a liquid crystal display, an OLED display, a projection display device. The display device 200 may additionally provide an intelligent network television function of a computer support function in addition to the broadcast receiving television function.
Fig. 2 is a block diagram illustrating a configuration of a control apparatus 100 according to an embodiment of the present application. As shown in fig. 2, the control device 100 includes a controller 110, a communication interface 130, a user input/output interface 140, a memory, and a power supply. The control apparatus 100 may receive an input operation instruction of a user and convert the operation instruction into an instruction recognizable and responsive to the display device 200, and function as an interaction between the user and the display device 200. The communication interface 130 is configured to communicate with the outside, and includes at least one of a WIFI chip, a bluetooth module, NFC, or an alternative module. The user input/output interface 140 includes at least one of a microphone, a touch pad, a sensor, keys, or an alternative module.
Fig. 3 is a block diagram of a hardware configuration of a display device 200 according to an embodiment of the present application. The display apparatus 200 shown in fig. 3 includes at least one of a modem 210, a communicator 220, a detector 230, an external device interface 240, a processor 250, a display 260, an audio output interface 270, a memory, a power supply, and a user interface 280. The processor includes a central processor, a video processor, an audio processor, a graphic processor, a RAM, a ROM, and first to nth interfaces for input/output. The display 260 may be at least one of a liquid crystal display, an OLED display, a touch display, and a projection display, and may also be a projection device and a projection screen. The modem 210 receives broadcast television signals through a wired or wireless reception manner, and demodulates audio and video signals, such as EPG data signals, from a plurality of wireless or wired broadcast television signals. The detector 230 is used to collect signals of the external environment or interaction with the outside. The processor 250 and the modem 210 may be located in separate devices, i.e., the modem 210 may also be located in an external device to the host device in which the processor 250 is located, such as an external set-top box or the like.
In some embodiments, processor 250 controls the operation of the display device and responds to user operations through various software control programs stored on the memory. The processor 250 controls the overall operation of the display device 200. The user may input a user command through a Graphical User Interface (GUI) displayed on the display 260, and the user input interface receives the user input command through the Graphical User Interface (GUI). Or the user may input the user command by inputting a specific sound or gesture, the user input interface recognizes the sound or gesture through the sensor, and receives the user input command.
In some embodiments, a "user interface" is a media interface for interaction and exchange of information between an application or operating system and a user that enables conversion between an internal form of information and a form acceptable to the user. A commonly used presentation form of a user interface is a graphical user interface (Graphic User Interface, GUI), which refers to a graphically displayed user interface that is related to computer operations. It may be an interface element such as an icon, a window, a control, etc. displayed in a display screen of the electronic device, where the control may include at least one of 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, etc.
Fig. 4 is a schematic software configuration diagram of a display device 200 according to an embodiment of the present application, as shown in fig. 4, the system is divided into four layers, namely, an application layer (application layer), an application framework layer (Application Framework layer), a An Zhuoyun line layer (Android runtime) and a system library layer (system runtime layer), and a kernel layer. The kernel layer contains at least one of the following drivers: audio drive, display drive, bluetooth drive, camera drive, WIFI drive, USB drive, HDMI drive, sensor drive (e.g., fingerprint sensor, temperature sensor, pressure sensor, etc.), and power supply drive, etc.
Fig. 5 is a schematic structural diagram of a display 260 according to an embodiment of the application, and as shown in fig. 5, the display 260 includes a display panel 261 and a backlight module 262. Wherein the display panel 261 may be used to display an image; the backlight module 262 may include a plurality of backlight partitions, and the backlight module 262 may adjust the backlight brightness value of each backlight partition through the backlight driving unit, so as to change the brightness of the display panel 261.
In the embodiment of the application, the display device may be a product with a display function, for example, a mobile phone, a tablet computer, a television, a notebook computer, etc.; a component having a display function, for example, a liquid crystal display or the like may be used.
Fig. 6 is a schematic structural diagram of a backlight module 262 according to an embodiment of the application. A plurality of backlight partitions 601 may be disposed on the backlight module 262, and one or more backlight units 602 may be disposed in each of the backlight partitions 601. One or more backlight units in the same backlight section 601 may be adjusted by the same backlight brightness value, while different backlight sections 601 may be respectively adjusted by mutually independent backlight brightness values.
Illustratively, 4 backlight partitions 601-a through 601-d, each having 4 backlight units disposed therein, are shown in a lower partial enlarged view shown in fig. 6. By setting the backlight luminance values of the 4 backlight partitions 601-a to 601-d, the pixels corresponding to the backlight partitions can be caused to display the corresponding gray scale, thereby realizing higher contrast. For example, when one or more pixels corresponding to the backlight partition 601-a are to display a solid black image, the backlight luminance value of the backlight partition 601-a may be set to 0; when one or more pixels corresponding to the backlight partition 601-b are to display a pure white image, the backlight value of the backlight partition 601-b may be set to 255.
In embodiments of the present application, the backlight partitions may be partitioned in any suitable manner, and the shape of the backlight partitions is not limited to a regular geometric shape. For example, since the user's attention is generally focused on the central region of the screen, the central region of the backlight module may be divided into a large number of backlight partitions having a small area, and each of the backlight partitions may include 1 backlight unit, for example. For the area around the screen, the attention of the user is less, so the edge area of the backlight module may be divided into a small number of backlight partitions with larger area, and each backlight partition may include 20 backlight units, for example.
In the embodiment of the present application, the shape of the backlight partition may be square, or may be a bar, a polygonal line, or other shapes with rules or irregularities, which is not limited in the present application.
In order to further explain the technical solution provided by the embodiments of the present application, the following details are described with reference to the accompanying drawings and the detailed description. Although embodiments of the present application provide the method operational steps shown in the following embodiments or figures, more or fewer operational steps may be included in the method, either on a routine or non-inventive basis. In steps where there is logically no necessary causal relationship, the execution order of the steps is not limited to the execution order provided by the embodiments of the present application. The method may be performed sequentially or and in accordance with the method shown in the embodiments or drawings when the actual process or apparatus is performed.
For easy understanding, a backlight adjusting method provided by the application is described in detail below through specific embodiments. Fig. 7 shows a flow chart of a backlight adjustment method. As shown in fig. 7, the method may include the steps of:
in step S701, a first image to be displayed is divided into a plurality of image areas according to the number of backlight partitions, and a motion vector of each image area is determined.
Wherein K is a positive integer greater than 1; each image area corresponds to a backlight partition.
In an alternative embodiment, the number of backlight partitions may be represented by w×h, and the number of backlight partitions may be determined according to the type of the display device currently used, and, for example, assuming that the processor determines that the number of backlight partitions is 3*3 according to the type of the display device currently used, after receiving the target image to be displayed, the display device may divide the target image to be displayed into 3*3 image areas according to the number of backlight partitions, as shown in fig. 8, and the image areas 801 to 809 respectively correspond to one backlight partition.
After the first image is divided into the plurality of image areas in the above manner, the first image may be divided into the plurality of image blocks, and the motion vectors of the respective image areas may be determined according to the motion vectors of the respective image blocks included in the respective image areas.
Step S702, respectively determining the backlight brightness value of each image area according to the motion vector of each image area and the brightness of each pixel point in the second image.
The second image is the next frame image of the first image, and the motion vector of each image area comprises the displacement direction of the image area and the displacement size of the image area.
In an alternative embodiment, the corresponding target moving area of each image area in the second image may be determined according to the motion vector of each image area; and respectively determining the backlight brightness value of each image area according to the brightness of each pixel point of each image area in the corresponding target moving area in the second image.
In step S703, the backlight brightness of the backlight partition corresponding to each image area is adjusted according to the backlight brightness value of each image area.
After determining the backlight brightness value of each image area, the backlight brightness of the backlight partition corresponding to each image area can be adjusted based on the determined backlight brightness value.
By the method, the display device can respectively determine the backlight brightness value of each image area according to the motion vector of each image area and the brightness of each pixel point in the second image, and then adjust the backlight brightness of the backlight partition corresponding to each image area according to the backlight brightness value of each image area, so that the front frame image and the rear frame image are more consistent, and the display effect of a picture is further improved.
In the above step S701, it is assumed that the number of backlight partitions is K, where k=w×h. After dividing the first image to be displayed into K image areas according to the number of backlight partitions, the motion vector of each image area may be determined with reference to the method shown in fig. 9, as shown in fig. 9, and the method includes:
in step S901, the first image is divided into L image blocks.
Where L is a positive integer greater than K, i.e. the number of image blocks is greater than the number of image areas, the number of image areas may be 16×8 and the number of image blocks may be 240×135, for example.
Step S902, determining an image block contained in each image area;
in an alternative embodiment, after the first image is divided into L image blocks, the L image blocks may be grouped according to the positions of the respective image areas, that is, the image blocks included in each image area are determined.
Specifically, assuming that the number of image areas is K and the number of image blocks is L, where k=w×h and l=m×n, the number of image blocks included in each image area may be determined according to formula 1.
Where S represents the number of image blocks contained in each image area.
Illustratively, in one embodiment, when the number of image blocks is an integer multiple of the number of image areas, for example, the number of image areas is 4*3 and the number of image blocks is 8*6, it may be determined that the number of image blocks included in each image area is 2×2, that is, 4 image blocks in each image area, according to equation 1. As shown in fig. 10, image blocks a-1 to a-4 included in the image area a are shown in a lower partial enlarged view shown in fig. 10.
In another embodiment, when the number of image blocks is not an integer multiple of the number of image areas, the image blocks may be grouped by bilinear difference method, for example, when the number of image areas is 16×8 and the number of image blocks is 240×135, as can be seen from equation 1Is an integer; is a non-integer, and therefore, needs to be redetermined In particular, the ratio of (2) can be determined by using the formulaIs a ratio i of (2).
Wherein i represents redeterminedIs used in the ratio of (a),Representation pairThe result of (2) is rounded down, i.e. i=17.
Therefore, when the number of image areas is 16×8 and the number of image blocks is 240×135, the number of image blocks included in each image area is 15×17, that is, 255 image blocks are included in each image area.
Step S903, each image area is sequentially used as a current image area, and a motion vector of each image block included in the current image area is determined.
After determining each image block included in the current image area in step S902, a motion estimation algorithm may be used to determine a motion vector of each image block included in the current image area.
Specifically, in determining the motion vector of each image block included in the current image area by using the motion estimation algorithm, each image block included in the current image area may be sequentially used as the current image block, and the motion vector of the current image block may be determined with reference to the method shown in fig. 11, as shown in fig. 11, where the method includes:
step S1101, obtaining the image characteristics of the current image block;
step S1102, finding a matched image block of the current image block in the third image according to the image characteristics of the current image block;
Wherein the third image is the last frame of the first image.
Step S1103, determining the motion vector of the current image block according to the position of the matching image block in the third image and the position of the current image block in the first image.
For example, assuming that the image block b is a current image block, for the image block b, the image feature of the image block b may be extracted first, then the previous frame image of the target image, that is, the third image, is obtained from the memory, and based on the extracted image feature of the image block b, a matching image block b ' with the highest similarity to the image block b is found in the third image, and the position of the matching image block b ' in the third image is determined, and then the motion vector of the image block b is determined according to the positions of the image block b ' and the image block b. Exemplarily, as shown in fig. 12 and 13, 1201 is a position of an image block b' in the third image; 1301 is the position of the image block b in the first image, and according to the positions of the image block b' and the image block b, it can be determined that the motion vector of the image block b is moved to the right by 3 units.
By the method, the motion vectors of the image blocks contained in the current image area can be determined in sequence.
Step S904, determining a motion vector of the current image area according to the motion vectors of the image blocks included in the current image area.
Wherein the motion vector of each image block comprises the displacement direction of the image block and the displacement size of the image block. The motion vector of the current image area includes a displacement direction and a displacement size of the current image area, and in one embodiment, when the motion vectors of the image blocks included in the current image area are consistent, the displacement direction of the current image area is kept consistent with the displacement direction of the image blocks included in the current image area, and the displacement size of the current image area can be determined according to the displacement size of the image blocks included in the current image area and the ratio of the number of the image areas to the number of the image blocks.
For example, as shown in fig. 14, assuming that the image area 801 is a current image area, the number of image blocks included in each image area is determined to be 2×2 according to formula 1, and it is determined that the motion vector of each image block included in the current image area is moved to the right by 4 block units through step S903, the motion vector of the image area 801 is moved to the right by 2 area units, that is, the image blocks 801-1 to 801-4 are moved to the right by 4 block units, moved to positions corresponding to the image blocks 803-1 to 803-4, and the image area 801 is moved to the right by 2 area units.
In another embodiment, when the motion vectors of the respective image blocks included in the current image area are inconsistent, the first motion vector and the second motion vector of the current image area may be determined according to the motion vectors of the respective image blocks included in the current image area.
Specifically, when the motion vectors of the respective image blocks included in the current image area are inconsistent, a first image set and a second image set may be respectively determined according to the motion vectors of the respective image blocks included in the current image area, where the first image set may be a same-motion image set including the largest number of image blocks, and the second image set may be a same-motion image set including the largest number of image blocks, and the same-motion image set includes image blocks having the same motion vector in the current image area; the method comprises the steps of taking image blocks with the same motion vector and the largest number of the image blocks as a first image set and taking image blocks with the same motion vector and the largest number of the image blocks as a second image set according to motion vectors of the image blocks in the first image set, determining the first motion vector of the current image region according to the motion vectors of the image blocks in the first image set, and determining the second motion vector of the current image region according to the motion vectors of the image blocks in the second image set.
Illustratively, in one embodiment, assuming that image blocks including two motion vectors in the current image area are included, as shown in fig. 15, it is assumed that the number of image blocks included in each image area can be determined to be 4*2 according to equation 1, and it is determined that one of the image blocks including two motion vectors in the current image area is marked with diagonal lines, and the motion vector is an image block shifted to the right by 8 block units through step S903; one is marked with vertical lines, and the motion vector is an image block shifted downward by 6 block units; by comparing the numbers of the two image blocks, it is known that the number of the image blocks marked with oblique lines is larger than that of the image blocks marked with vertical lines, so that the image set formed by the image blocks marked with shadows can be used as a first image set, and the image set formed by the image blocks marked with vertical lines can be used as a second image set; according to the motion vectors of the image blocks in the first image set, the first motion vector of the current image area can be determined to be moved to the right by 2 area units, and according to the motion vectors of the image blocks in the second image set, the second motion vector can be determined to be moved to the lower by 3 area units.
In another embodiment, assuming that image blocks including three motion vectors in the current image area are included, as shown in fig. 16, it is assumed that the number of image blocks included in each image area can be determined to be 4*2 according to equation 1, and it is determined that one of the image blocks including three motion vectors in the current image area is an image block with diagonal lines, the motion vector being shifted to the right by 8 block units, through step S903; one is marked with vertical lines, and the motion vector is an image block shifted downward by 6 block units; one is marked with a dashed line, the motion vector is an image block that moves up by 2 block units; by counting the number of the three image blocks, it is known that the number of the image blocks marked with oblique lines is the largest, the number of the image blocks marked with vertical lines is the largest, and the number of the image blocks marked with broken lines is the smallest. According to the motion vectors of the image blocks in the first image set, the first motion vector of the current image area can be determined to be moved to the right by 2 area units, and according to the motion vectors of the image blocks in the second image set, the second motion vector can be determined to be moved to the lower by 3 area units.
In the embodiment of the present application, in the process of determining the first image set and the second image set according to the motion vectors of the image blocks included in the current image area, according to the actual situation, the image blocks with the same motion vectors and the largest number and the image blocks within a certain error range may be used as the first image set, and the image blocks with the same motion vectors and the largest number and the image blocks within the certain error range may be used as the second image set, where the image blocks within the certain error range may be the image blocks with errors in the displacement direction, but the error range is smaller than the displacement direction threshold, or the image blocks with errors in the displacement size, but the error range is smaller than the displacement threshold. The application is not limited in this regard.
After the motion vector of the current image area is determined by the method, the target moving area corresponding to the current image area in the second image can be determined according to the motion vector of the current image area.
Specifically, in one embodiment, when there is only one motion vector of the current image area, that is, when the motion vectors of the respective image blocks included in the current image area are identical, the position (x p,yp) of the center point of the corresponding target movement area of the current image area in the second image may be determined according to equation 3 and equation 4.
X p＝xi+vx*ph (equation 3)
Y p＝yi+vy*ph (equation 4)
Where (x i,yi) is the position of the center point of the current image region in the first image, (v x,vy) is the motion vector of the current image region, and p h is the time interval between the first image and the second image.
Illustratively, assuming that the position of the center point O of the current image area in the first image is (0.5 ), the motion vector of the current image area is (2, 0), representing a rightward movement by 2 area units, and the time interval between the first image and the second image is 1 second, the position of the center point P of the corresponding target movement area of the current image area in the second image is (2.5,0.5). As shown in fig. 14, when the current image area is an image area 801 and the motion vector of the current image area is 2 area units shifted rightward, the target shift area corresponding to the current image area in the second image is the position corresponding to the image area 803.
In another embodiment, when the motion vector of the current image area includes two types, that is, when the motion vectors of the respective image blocks included in the current image area are inconsistent, the method shown in fig. 17 may be referred to, and the corresponding target movement area of the current image area in the second image may be determined, as shown in fig. 17, and the method includes:
step S1701, determining a first moving area corresponding to the current image area in the second image according to the first motion vector of the current image area;
Specifically, according to a first motion vector of the current image area, determining a first moving area corresponding to the current image area in the second image by adopting a formula 3 and a formula 4; for example, as shown in fig. 14, assuming that the current image area is an image area 801, the first motion vector of the current image area is shifted to the right by 2 area units, the corresponding first shift area of the current image area in the second image is the position corresponding to the image area 803.
Step S1702, determining a second moving area corresponding to the current image area in a second image according to a second motion vector of the current image area;
Specifically, according to a second motion vector of the current image area, determining a second moving area corresponding to the current image area in the second image by adopting a formula 3 and a formula 4; illustratively, as shown in fig. 14, assuming that the current image area is an image area 801 and the second motion vector of the current image area is a downward movement by 1 area unit, the corresponding first movement area of the current image area in the second image is a position corresponding to an image area 804.
Step S1703, determining gray values of the first moving area and the second moving area.
After determining the first moving area and the second moving area corresponding to the current image area in the second image through step S1701 and step S1702, the second image may be acquired from the memory, and the gray value of the first moving area is determined according to each pixel point included in the first moving area, and the gray value of the second moving area is determined according to each pixel point included in the second moving area.
In the embodiment of the present application, when determining the gray value of each pixel according to the pixel value of each pixel, a scaling method may be adopted, for example, assuming that the pixel value of a certain pixel is r=100, g=120, and b=100, the method may be as follows: g: b=0.3: 0.3: the ratio of 0.1 determines that the gray value of the pixel point is R0.3+G 0.3+B+0.1, namely the gray value of the pixel point is 76; a maximum value method may be used, for example, assuming that a pixel value of a certain pixel point is r=100, g=120, and b=100, and the gray value of the pixel point may be determined to be 120 according to the maximum value method, which is not limited in the present application.
Step S1704, determining a target moving area corresponding to the current image area in the second image according to the gray values of the first moving area and the second moving area.
After determining the gray values of the first moving region and the second moving region respectively in step S1703, the method shown in fig. 18 may be referred to, and the target moving region corresponding to the current image region in the second image may be determined, as shown in fig. 18, where the method includes:
step S1801, determining a target gray value;
the target gray value is the gray value of the current image area; the target gray value may be determined according to the pixel values of the respective pixel points included in the current image region.
Step S1802, determining a first gray-scale difference between the gray-scale value of the first moving region and the target gray-scale value;
Specifically, the first gray difference value may be determined according to equation 5.
Diff 1＝|B1-B0 (equation 5)
Wherein Diff 1 represents a first gradation difference value, B 1 represents a gradation value of the first moving region, and B 0 represents a target gradation value.
Step S1803, determining a second gray level difference between the gray level value of the second moving region and the target gray level value;
Specifically, the second gray level difference may be determined according to equation 6.
Diff 2＝|B2-B0 (equation 6)
Wherein Diff 2 represents the second gray level difference, B 2 represents the gray level of the second movement region, and B 0 represents the target gray level.
Step S1804, whether the first gray level difference is smaller than the second gray level difference; if yes, go to step S1805; if not, executing step S1806;
Step S1805, using the first movement region as a target movement region;
step S1806, the second movement region is set as the target movement region.
Illustratively, in one embodiment, assuming that the target gray value is 200, the gray value of the first moving region is 210, and the gray value of the second moving region is 180, the first gray difference value is 10, the second gray difference value is 20, and the first gray difference value is smaller than the second gray difference value, and thus the first moving region may be regarded as the target moving region.
In another embodiment, assuming that the target gray value is 200, the gray value of the first moving region is 230, and the gray value of the second moving region is 180, the first gray difference value is 30, the second gray difference value is 20, and the first gray difference value is greater than the second gray difference value, so the second moving region may be regarded as the target moving region.
Through the method, after the target moving area corresponding to the current image area in the second image is determined, the gray value of the target moving area can be used as the backlight brightness value of the current image area.
Specifically, if the first moving region is the target moving region, the gray value of the first moving region is used as the backlight brightness value of the current image region; or alternatively
And if the second moving area is the target moving area, taking the gray value of the second moving area as the backlight brightness value of the current image area.
After the backlight brightness value of each image area is determined by the method, the backlight brightness of the backlight partition corresponding to each image area can be adjusted according to the determined backlight brightness value.
Based on the same inventive concept, there is also provided a backlight adjusting device according to an embodiment of the present application, as shown in fig. 19, including:
A first determination unit 1901 dividing a first image to be displayed into a plurality of image areas in accordance with the number of backlight partitions, and determining a motion vector of each image area; each image area corresponds to a backlight partition;
a second determining unit 1902, configured to determine a backlight luminance value of each image area according to the motion vector of each image area and the luminance of each pixel point in the second image; the second image is the next frame image of the first image;
the adjustment unit 1903 adjusts the backlight luminance of the backlight partition corresponding to each image area in accordance with the backlight luminance value of each image area.
In a possible implementation manner, the second determining unit 1902 is specifically configured to:
According to the motion vector of each image area, respectively determining a corresponding target moving area of each image area in the second image;
And respectively determining the backlight brightness value of each image area according to the brightness of each pixel point of each image area in the corresponding target moving area in the second image.
In a possible implementation manner, the number of the backlight partitions is K, and after the first determining unit 1901, a dividing unit 2001 is further included, as shown in fig. 20, where the dividing unit 2001 is specifically configured to:
Dividing the first image into L image blocks, and determining the image blocks contained in each image area; l is a positive integer greater than K;
Determining a motion vector of the first image region by; the first image area is any one of K image areas:
Determining a motion vector of each image block contained in the first image area;
and determining the motion vector of the first image area according to the motion vector of each image block.
In a possible implementation manner, if the motion vectors of the image blocks included in the first image area are inconsistent, the motion vectors of the first image area include a first motion vector and a second motion vector; the first motion vector is determined from motion vectors of respective image blocks in the first image set; the second motion vector is determined from the motion vectors of the image blocks in the second image set; the first image set is the same moving image set with the largest number of image blocks; the second image set is a same-motion image set containing a plurality of image blocks; the same moving image set contains image blocks having the same motion vector in the first image region.
In one possible implementation manner, the second determining unit 1902 is specifically configured to:
Determining a first moving area corresponding to the first image area in the second image according to the first motion vector, and determining a second moving area corresponding to the first image area in the second image according to the second motion vector;
respectively determining gray values of the first moving area and the second moving area;
and determining a target moving area corresponding to the first image area in the second image according to the gray values of the first moving area and the second moving area.
In one possible implementation manner, the second determining unit 1902 is specifically configured to:
Respectively determining a first gray level difference value between the gray level value of the first moving area and a target gray level value and a second gray level difference value between the gray level value of the second moving area and the target gray level value; the target gray value is the gray value of the current image area;
if the first gray level difference value is smaller than the second gray level difference value, the first moving area is used as a target moving area; or alternatively
And if the second gray level difference value is smaller than the first gray level difference value, taking the second moving area as a target moving area.
In one possible implementation, the first determining unit 1901 is specifically configured to:
Acquiring image features of the first image block;
according to the image characteristics of the first image block, finding a matched image block of the first image block in a third image; the third image is the previous frame image of the first image;
and determining a motion vector of the first image block according to the position of the matching image block in the third image and the position of the first image block in the first image.
In one possible implementation, the motion vector of the first image block includes a displacement direction of the first image block and a displacement size of the first image block.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (8)
1. The display device is characterized by comprising a processor, a display panel and a backlight module positioned on the back of the display panel;
The display panel is used for displaying images;
the backlight module is used for providing backlight for the display panel and comprises a plurality of backlight partitions;
The processor is configured to:
If the number of backlight partitions contained in the backlight module is K, dividing a first image to be displayed into K image areas according to the number of backlight partitions contained in the backlight module, dividing the first image into L image blocks, and determining the image blocks contained in each image area, wherein K is a positive integer greater than 1, L is a positive integer greater than K, and each image area corresponds to one backlight partition;
Sequentially taking each image area as a first image area, and determining a motion vector of each image block contained in the first image area; determining a motion vector of the first image area according to the motion vector of each image block;
according to the motion vector of each image area, respectively determining a corresponding target moving area of each image area in the second image; respectively determining backlight brightness values of each image area according to brightness of each pixel point in a corresponding target moving area of each image area in the second image, wherein the second image is the next frame image of the first image;
and adjusting the backlight brightness of the backlight subarea corresponding to each image area according to the backlight brightness value of each image area.
2. The display device according to claim 1, wherein if the motion vectors of the image blocks included in the first image area are inconsistent, the motion vectors of the first image area include a first motion vector and a second motion vector; the first motion vector is determined from motion vectors of respective image blocks in the first image set; the second motion vector is determined from the motion vectors of the image blocks in the second image set; the first image set is the same moving image set with the largest number of image blocks; the second image set is a same-motion image set containing a plurality of image blocks; the same moving image set contains image blocks having the same motion vector in the first image region.
3. The display device of claim 2, wherein the processor is specifically configured to determine the corresponding target movement region of the first image region in the second image by:
Determining a first moving area corresponding to the first image area in the second image according to the first motion vector, and determining a second moving area corresponding to the first image area in the second image according to the second motion vector;
respectively determining gray values of the first moving area and the second moving area;
and determining a target moving area corresponding to the first image area in the second image according to the gray values of the first moving area and the second moving area.
4. A display device according to claim 3, wherein the processor is specifically configured to:
respectively determining a first gray level difference value between the gray level value of the first moving area and a target gray level value and a second gray level difference value between the gray level value of the second moving area and the target gray level value; the target gray value is the gray value of the first image area;
if the first gray level difference value is smaller than the second gray level difference value, the first moving area is used as a target moving area; or alternatively
And if the second gray level difference value is smaller than the first gray level difference value, taking the second moving area as a target moving area.
5. The display device according to any one of claims 1 to 4, wherein the processor is specifically configured to determine the motion vector of the first image block by; the first image block is any one of the image blocks contained in the first image area:
Acquiring image features of the first image block;
according to the image characteristics of the first image block, finding a matched image block of the first image block in a third image; the third image is the previous frame image of the first image;
and determining a motion vector of the first image block according to the position of the matching image block in the third image and the position of the first image block in the first image.
6. The display device of claim 5, wherein the motion vector of the first image block comprises a displacement direction of the first image block and a displacement magnitude of the first image block.
7. A backlight adjustment method, the method comprising:
If the number of the backlight partitions is K, dividing a first image to be displayed into K image areas according to the number of the backlight partitions; dividing the first image into L image blocks, and determining the image blocks contained in each image area, wherein K is a positive integer greater than 1, L is a positive integer greater than K, and each image area corresponds to one backlight partition;
Sequentially taking each image area as a first image area, and determining a motion vector of each image block contained in the first image area; determining a motion vector of the first image area according to the motion vector of each image block;
according to the motion vector of each image area, respectively determining a corresponding target moving area of each image area in the second image; respectively determining backlight brightness values of each image area according to brightness of each pixel point in a corresponding target moving area of each image area in the second image, wherein the second image is the next frame image of the first image;
and adjusting the backlight brightness of the backlight subarea corresponding to each image area according to the backlight brightness value of each image area.
8. A computer-readable storage medium having a computer program stored therein, characterized in that: which computer program, when being executed by a processor, implements the method of claim 7.
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