CN114463358A - Screen projection display method and device, electronic equipment and readable storage medium - Google Patents
Screen projection display method and device, electronic equipment and readable storage medium Download PDFInfo
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- CN114463358A CN114463358A CN202210114217.XA CN202210114217A CN114463358A CN 114463358 A CN114463358 A CN 114463358A CN 202210114217 A CN202210114217 A CN 202210114217A CN 114463358 A CN114463358 A CN 114463358A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/10—Segmentation; Edge detection
- G06T7/13—Edge detection
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
- G06F3/1454—Digital output to display device ; Cooperation and interconnection of the display device with other functional units involving copying of the display data of a local workstation or window to a remote workstation or window so that an actual copy of the data is displayed simultaneously on two or more displays, e.g. teledisplay
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/10—Segmentation; Edge detection
- G06T7/12—Edge-based segmentation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/10—Segmentation; Edge detection
- G06T7/136—Segmentation; Edge detection involving thresholding
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/90—Determination of colour characteristics
Abstract
The invention discloses a screen projection display method, a screen projection display device, electronic equipment and a readable storage medium, wherein the screen projection display method comprises the following steps: acquiring screen projection data, wherein the screen projection data comprise image data, and acquiring a first picture and a second picture from the image data; carrying out black edge recognition on the first picture, and determining a first cutting position of the first picture; carrying out black edge recognition on the second picture, and determining a second cutting position of the second picture; judging whether the first cutting position is the same as the second cutting position; if not, generating a target cutting position according to the first cutting position and the second cutting position; and according to the target cutting position, cutting the image data to obtain the cut image data. When the display equipment plays the cut picture, the actual playing area can cover the whole screen, and black edges can not be generated, so that the display effect is enlarged, and the watching experience of a user is improved.
Description
Technical Field
The invention relates to the technical field of screen projection, in particular to a screen projection display method and device, electronic equipment and a readable storage medium.
Background
With the change of times, the current large screen end of the television is more and more regarded as the screen projection requirement by users, and with the continuous development of the screen projection industry, the screen projection technology on the market is mature day by day, but has higher requirements on the screen projection experience. The content displayed at the large screen end by the current screen projection technology often depends on the content of a playing source, but large-screen equipment such as a television is used as a horizontal screen display window, if the content of the playing source is horizontal screen content, the television can be well adapted, but a mobile phone end often is a vertical screen display window, for example, when a user projects a screen to brush the video, the upper part and the lower part of the video are black edges, only the middle part is an actual video playing picture, the user can not see the video content clearly when projecting the video, and the large-area black edges of the television can also reduce the use experience of the user.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide screen projection display and aims to solve the technical problem that the user experience is poor when the screen is projected by the current screen projection technology.
In order to achieve the above object, the present invention provides a screen projection display method, which comprises the following steps:
acquiring screen projection data, wherein the screen projection data comprise image data, and acquiring a first picture and a second picture from the image data;
carrying out black edge recognition on the first picture, and determining a first cutting position of the first picture;
carrying out black edge recognition on the second picture, and determining a second cutting position of the second picture;
judging whether the first cutting position is the same as the second cutting position;
if not, generating a target cutting position according to the first cutting position and the second cutting position;
and according to the target cutting position, cutting the image data to obtain the cut image data.
Further, the step of performing black edge recognition on the first picture and determining the first clipping position of the first picture includes:
comparing the color values of the pixel points of the first picture, dividing the pixel points of the first picture into comparison units, and taking the position of the comparison units, in which the color value change degree of the pixel points exceeds a preset threshold value, as the first cutting position.
Further, the step of dividing the pixel points of the first picture into comparison units includes:
dividing the pixel points of the first picture into rows according to rows and comparing units;
or/and dividing the pixel points of the first picture into column comparison units according to columns.
Further, the step of taking the position where the change degree of the color value of the pixel point of the comparison unit exceeds a preset threshold value as the first clipping position includes:
when the comparison unit is the row comparison unit, acquiring a current comparison unit according to a first preset comparison sequence, and when the comparison unit is the column comparison unit, acquiring the current comparison unit according to a second preset comparison sequence;
comparing the pixel point color value of the current comparison unit with the pixel point color value of the adjacent comparison unit of the current comparison unit;
if the quantity of the pixel point color values of the current comparison unit and the pixel point color values of the adjacent comparison unit is different from the preset threshold value, taking the position between the current comparison unit and the adjacent comparison unit as the first cutting position;
if the pixel color value of the current comparison unit is different from the pixel color value of the adjacent comparison unit and does not exceed the preset threshold, the current comparison unit is obtained again until the pixel point of the first picture is traversed.
Further, the step of comparing the pixel color value of the current comparison unit with the pixel color value of the adjacent comparison unit of the current comparison unit comprises:
and judging whether the color value of any pixel point of the current comparison unit is different from the color value of the pixel point adjacent to the any pixel point in the adjacent comparison unit.
Further, the first preset comparison sequence includes: the sequence from the upper and lower edges of the picture to the middle of the picture; or, from the middle of the picture to the sequence of the upper and lower edges of the picture, the second preset comparison sequence includes: the sequence from the left and right edges of the picture to the middle of the picture; or from the middle of the screen to the left and right edges of the screen.
Further, the step of acquiring the first picture and the second picture from the image data comprises:
and acquiring a second picture after acquiring a first picture from the image data at a preset time interval.
Further, the step of generating a target clipping position according to the first clipping position and the second clipping position includes:
acquiring a coordinate average value according to the first cutting position and the second cutting position;
and determining the coordinate average value as the target cutting position.
Further, the step of generating a target clipping position according to the first clipping position and the second clipping position includes:
acquiring a third picture from the image data;
carrying out black edge recognition on the third picture, and determining a third cutting position of the third picture;
acquiring a coordinate average value according to the first cutting position, the second cutting position and the third cutting position;
and determining the coordinate average value as the target cutting position.
Further, the method further comprises:
and if the first cutting position is the same as the second cutting position, taking the first cutting position or the second cutting position as the target cutting position.
In addition, to achieve the above object, the present invention provides a screen projection display device, including:
the system comprises an acquisition module, a display module and a display module, wherein the acquisition module is used for acquiring screen projection data, the screen projection data comprise image data, and a first picture and a second picture are acquired from the image data;
the first identification module is used for carrying out black edge identification on the first picture and determining a first cutting position of the first picture;
the second identification module is used for carrying out black edge identification on the second picture and determining a second cutting position of the second picture;
the judging module is used for judging whether the first cutting position is the same as the second cutting position;
a generating module, configured to generate a target clipping position according to the first clipping position and the second clipping position if the first clipping position and the second clipping position are different from each other
And the cutting module is used for cutting the image data according to the target cutting position so as to obtain the cut image data.
In addition, to achieve the above object, the present invention also provides an electronic device including: the system comprises a memory, a processor and a screen projection display program stored on the memory and capable of running on the processor, wherein the screen projection display program realizes the steps of the screen projection display method when being executed by the processor.
In addition, to achieve the above object, the present invention further provides a readable storage medium, on which a screen projection display program is stored, and the screen projection display program, when executed by a processor, implements the steps of the screen projection display method as described above.
According to the screen projection display method provided by the embodiment of the invention, the picture is obtained from the screen projection data, the color value comparison analysis of the pixel points is carried out on the obtained picture, the interval line with obvious color value change is used as the cutting position, the black edge part of the image data in the screen projection data is cut out, and the actual playing area is left, so that the actual playing area covers the whole large-screen device, the black edge condition cannot be generated, the display effect during video playing is amplified, and the watching experience of a user is improved.
Drawings
FIG. 1 is a schematic view of a screen projection connection scene in the screen projection display method according to the present invention;
FIG. 2 is a schematic diagram of an electronic device in a hardware operating environment according to an embodiment of the present invention;
FIG. 3 is a flowchart illustrating a first exemplary embodiment of a screen projection display method according to the present invention;
FIG. 4 is a flowchart illustrating a second embodiment of a screen projection display method according to the present invention;
FIG. 5 is a schematic view of a display screen on a display device before the screen is cut in the screen-casting display method of the present invention;
FIG. 6 is a schematic view of a display screen on a display device after the screen is cut in the screen-casting display method of the present invention;
FIG. 7 is a schematic diagram of coordinates before clipping a picture in the screen-projection display method according to the present invention;
FIG. 8 is a schematic view of a screen projection display method according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a device related to the screen projection display method of the present invention.
The implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The main solution of the embodiment of the invention is as follows: and acquiring a picture from the screen projection data, comparing and analyzing the color values of pixel points of the acquired picture, and taking a spacing line with obvious color value change as a cutting position, so as to cut out the black edge part of the image data in the screen projection data and leave an actual playing area.
Because the content displayed at the large screen end by the current screen projection technology often depends on the content of a playing source, but large-screen equipment such as a television is used as a horizontal screen display window, if the content of the playing source is horizontal screen content, the television can be well adapted, but a mobile phone end often is a vertical screen display window, for example, when a user projects a screen to brush the video, the upper part and the lower part of a part of the video are black edges, only the middle part is an actual video playing picture, the user can not see the video content clearly when projecting the television, and the large-area black edges of the television can also reduce the use experience of the user.
The invention provides a solution, so that the actual playing area covers the whole large-screen device without generating the condition of black edges, the display effect during video playing is enlarged, and the watching experience of a user is improved.
Referring to fig. 1, fig. 1 is a schematic view of a screen projection connection according to an embodiment of the present invention.
As shown in fig. 1, the screen projector includes: the electronic device comprises a screen projector transmitter and a screen projector receiver, wherein the first electronic device can be a personal computer, or can be a mobile terminal device such as a smart phone, a tablet computer, an electronic book reader and a portable computer, and the second electronic device can be a television, or can be a display device such as a display and a projector with a display function.
In some embodiments, the first electronic device is connected with the screen projector transmitter or the screen projector receiver through a wired or wireless network for data transmission and interaction; the screen projector transmitter is connected with the screen projector receiver through a wireless network to perform data transmission and interaction, or the screen projector transmitter is connected with the second electronic equipment through the wireless network to perform data transmission and interaction; the screen projector receiver is connected with the second electronic equipment through a wired or wireless network to perform data transmission and interaction. In an optional implementation manner, the wired connection between the screen projector receiver and the second electronic device and the wired connection between the screen projector transmitter and the first electronic device may include wired connections based on HDMI (High Definition Multimedia Interface), USB (Universal Serial Bus), DP (display Interface), VGA (Video Graphics Array), and the like. The wireless communication modes between the first electronic device and the screen projector and between the first electronic device and the screen projector receiver and between the second electronic device and the screen projector receiver can include wireless communication such as Bluetooth (Bluetooth), wireless broadband (Wi-Fi) and infrared communication.
Therefore, the possible connection modes for realizing screen projection between the first electronic device, the screen projector transmitter, the screen projector receiver and the second electronic device at least include:
(1) the screen projector transmitter is connected with the screen projector receiver, and the first electronic equipment picture is finally projected to the second electronic equipment through the screen projector transmitter and the screen projector receiver;
(2) the screen projector transmitter is wirelessly connected with the second electronic equipment, the picture of the first electronic equipment is projected to the second electronic equipment through the screen projector transmitter, and at the moment, the screen projector transmitter is connected with a wireless communication module arranged in the second electronic equipment through a wireless network;
(3) the first electronic equipment is connected with the screen projector receiver, and the first electronic equipment picture is projected to the second electronic equipment through the screen projector receiver.
As shown in fig. 2, fig. 2 is a schematic structural diagram of an electronic device in a hardware operating environment according to an embodiment of the present invention.
The electronic equipment in the embodiment of the invention can be a screen projector, and also can be electronic equipment with data receiving, data processing and data sending functions, such as a television, a mobile phone, a PC, a tablet personal computer, a portable computer and the like.
As shown in fig. 1, the apparatus may include: a processor 1001, such as a CPU, a network interface 1004, a user interface 1003, a memory 1005, a communication bus 1002. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 1005 may alternatively be a storage device separate from the processor 1001.
Optionally, the device may also include a camera, RF (Radio Frequency) circuitry, sensors, audio circuitry, WiFi modules, and so forth. Such as light sensors, motion sensors, and other sensors. In particular, the light sensor may include an ambient light sensor that adjusts the brightness of the display screen based on the intensity of ambient light, and a proximity sensor that turns off the display screen and/or backlight when the mobile device is moved to the ear. As one of the motion sensors, the gravity acceleration sensor can detect the magnitude of acceleration in each direction (generally, three axes), detect the magnitude and direction of gravity when the mobile terminal is stationary, and can be used for applications (such as horizontal and vertical screen switching, related games, magnetometer attitude calibration), vibration recognition related functions (such as pedometer and tapping) and the like for recognizing the attitude of the mobile terminal; of course, the mobile terminal may also be configured with other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which are not described herein again.
Those skilled in the art will appreciate that the configuration of the apparatus shown in fig. 2 is not intended to be limiting and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 2, a memory 1005, which is a kind of computer storage medium, may include therein an operating system, a network communication module, a user interface module, and a screen projection display program.
In the terminal shown in fig. 2, the network interface 1004 is mainly used for connecting a background server and performing data communication with the background server; the user interface 1003 is mainly used for connecting a client (user side) and performing data communication with the client; and the processor 1001 may be configured to call the screen projection display program stored in the memory 1005 and perform the following operations:
acquiring screen projection data, wherein the screen projection data comprise image data, and acquiring a first picture and a second picture from the image data;
carrying out black edge recognition on the first picture, and determining a first cutting position of the first picture;
carrying out black edge recognition on the second picture, and determining a second cutting position of the second picture;
judging whether the first cutting position is the same as the second cutting position;
if not, generating a target cutting position according to the first cutting position and the second cutting position;
and according to the target cutting position, cutting the image data to obtain the cut image data.
Further, the processor 1001 may call a screen projection display program stored in the memory 1005, and further perform the following operations:
the step of identifying the black edge of the first picture and determining the first cutting position of the first picture comprises the following steps:
comparing the color values of the pixel points of the first picture, dividing the pixel points of the first picture into comparison units, and taking the position of the comparison units, in which the color value change degree of the pixel points exceeds a preset threshold value, as the first cutting position.
Further, the processor 1001 may call a screen projection display program stored in the memory 1005, and further perform the following operations:
the step of dividing the pixel points of the first picture into comparison units comprises the following steps:
dividing the pixel points of the first picture into rows according to rows and comparing units;
or/and dividing the pixel points of the first picture into column comparison units according to columns.
Further, the processor 1001 may call a screen projection display program stored in the memory 1005, and further perform the following operations:
the step of taking the position of the comparison unit where the color value change degree of the pixel point exceeds a preset threshold value as the first clipping position comprises:
when the comparison unit is the row comparison unit, acquiring a current comparison unit according to a first preset comparison sequence, and when the comparison unit is the column comparison unit, acquiring the current comparison unit according to a second preset comparison sequence;
comparing the pixel point color value of the current comparison unit with the pixel point color value of the adjacent comparison unit of the current comparison unit;
if the number of the pixel point color values of the current comparison unit and the pixel point color values of the adjacent comparison unit is different from the preset threshold value, taking the position between the current comparison unit and the adjacent comparison unit as the first cutting position;
if the pixel color value of the current comparison unit is different from the pixel color value of the adjacent comparison unit and does not exceed the preset threshold, the current comparison unit is obtained again until the pixel point of the first picture is traversed.
Further, the processor 1001 may call a screen projection display program stored in the memory 1005, and further perform the following operations:
the step of comparing the pixel point color value of the current comparison unit with the pixel point color value of the adjacent comparison unit of the current comparison unit comprises the following steps:
and judging whether the color value of any pixel point of the current comparison unit is different from the color value of the pixel point adjacent to the any pixel point in the adjacent comparison unit.
Further, the first preset comparison sequence comprises: the sequence from the upper and lower edges of the picture to the middle of the picture; or, from the middle of the picture to the sequence of the upper and lower edges of the picture, the second preset comparison sequence includes: the sequence from the left and right edges of the picture to the middle of the picture; or from the middle of the screen to the left and right edges of the screen.
Further, the processor 1001 may call a screen projection display program stored in the memory 1005, and further perform the following operations:
the step of acquiring a first picture and a second picture from the image data comprises:
and acquiring a second picture after acquiring a first picture from the image data at a preset time interval.
Further, the processor 1001 may call a screen projection display program stored in the memory 1005, and further perform the following operations:
the step of generating a target clipping position according to the first clipping position and the second clipping position includes:
acquiring a coordinate average value according to the first cutting position and the second cutting position;
and determining the coordinate average value as the target cutting position.
Further, the processor 1001 may call a screen projection display program stored in the memory 1005, and further perform the following operations:
the step of generating a target clipping position according to the first clipping position and the second clipping position includes:
acquiring a third picture from the image data;
carrying out black edge recognition on the third picture, and determining a third cutting position of the third picture;
acquiring a coordinate average value according to the first cutting position, the second cutting position and the third cutting position;
and determining the coordinate average value as the target cutting position.
Further, the processor 1001 may call a screen projection display program stored in the memory 1005, and further perform the following operations:
the method further comprises the following steps:
and if the first cutting position is the same as the second cutting position, taking the first cutting position or the second cutting position as the target cutting position.
Referring to fig. 3, a screen projection display method according to a first embodiment of the present invention includes:
step S10, screen projection data is obtained, the screen projection data comprises image data, and a first picture and a second picture are obtained from the image data;
in this embodiment, the implementation subject may be an intelligent electronic device participating in the screen projection process, such as a screen projector transmitter, a screen projector receiver, a television, a mobile phone, and the like. The screen projector obtains screen projection data, which may generally include video data or several consecutive pictures, and the like, and may also include audio data. When the screen is projected, the screen projector acquires two pictures, namely a first picture or a second picture, from the acquired screen projection data. It can be understood that when the mobile phone performs screen projection on other display devices in a screen projection application scene, a situation of a black border generated during display on other display devices may be finally caused when the mobile phone plays a horizontal screen video as a vertical screen device, as shown in fig. 5, a display effect of the display device before cutting is shown, where areas 1 and 3 are black borders, area 2 is an actual playing area, and an intersection line between the black border and the actual playing area is an a line, a b line, a c line, and a d line, and if the obtained first picture or the obtained second picture includes areas 1 and 2, area 3 is automatically generated for adapting to screen projection data, so that the display device will have a large area of black borders to influence the viewing experience of a user in the screen projection situation.
Step S20, carrying out black edge recognition on the first picture, and determining a first cutting position of the first picture;
further, comparing the color values of the pixel points of the first picture, dividing the pixel points of the first picture into comparison units, and taking the position of the comparison unit where the color value change degree of the pixel points exceeds a preset threshold value as the first cutting position.
Specifically, the first picture is composed of a large number of pixels, in this embodiment, when color values (RGB, color values, for example, white color values are (255, 255, 255)) are compared for the pixels, the pixels of the first picture are divided into different comparison units according to different division rules, the color values of the pixels of the comparison units are compared, if the a comparison unit and the b comparison unit are compared, and if the difference between the two color values exceeds a preset threshold, the a comparison unit is used as a first clipping position, or the b comparison unit is used as a first clipping position, or the position between the a comparison unit and the b comparison unit is used as a clipping position.
Further, the step of dividing the pixel points of the first picture into comparison units includes: dividing the pixel points of the first picture into rows according to rows and comparing units; or/and dividing the pixel points of the first picture into column comparison units according to columns.
Specifically, the comparison unit may be divided into row comparison units according to rows, or column comparison units according to columns, or both the row comparison units and the column comparison units. When carrying out each pixel point color value of comparing the unit and comparing, can compare the unit to the line promptly, can compare the unit to the row, also can compare the unit to the line simultaneously and compare the unit to the row and the unit to the row.
Further, the step of taking the position where the change degree of the color value of the pixel point of the comparison unit exceeds a preset threshold value as the first clipping position includes: when the comparison unit is the row comparison unit, acquiring a current comparison unit according to a first preset comparison sequence, and when the comparison unit is the column comparison unit, acquiring the current comparison unit according to a second preset comparison sequence; comparing the pixel point color value of the current comparison unit with the pixel point color value of the adjacent comparison unit of the current comparison unit; if the number of the pixel point color values of the current comparison unit and the pixel point color values of the adjacent comparison unit is different from the preset threshold value, taking the position between the current comparison unit and the adjacent comparison unit as the first cutting position; if the pixel color value of the current comparison unit is different from the pixel color value of the adjacent comparison unit and does not exceed the preset threshold, the current comparison unit is obtained again until the pixel point of the first picture is traversed.
Specifically, the different comparison units correspond to different comparison sequences, the row comparison unit corresponds to a first preset comparison sequence, and the column comparison unit corresponds to a second preset comparison sequence. If the acquired first picture includes the region 1 and the region 2 shown in fig. 5, that is, there are upper and lower black edges (the region 1 is a black edge region), the comparison unit may be a row comparison unit, and according to a first preset comparison sequence, a pixel point of a certain row is acquired from the first picture as a current comparison row, and further a color value of each pixel point of the current comparison row is extracted and compared with a color value of a pixel point of an adjacent row of the current comparison row. And when the ratio of the number of the pixels with different color values in the current comparison row to the total number of the pixels in the adjacent row exceeds a preset ratio threshold, taking the interval line between the current comparison row and the adjacent row as the cutting line. If the total amount of the pixels in one row is 100, which corresponds to 100 color values, and if the preset duty ratio threshold is eighty percent, when the current comparison row and the adjacent row have 81 color values which are different (the preset duty ratio threshold can be set according to the actual situation), the first clipping position can be determined according to the position of the current comparison row and the position of the adjacent row, such as the line a and the line b in fig. 5. And if the ratio of the number of the pixels with different color values in the current comparison row to the total number of the pixels in one row does not exceed the preset ratio threshold, acquiring the current comparison row and the adjacent row of the current comparison row according to the preset first comparison sequence again to compare the color values of the pixels. Until all the pixel points of the first picture are compared in a row mode.
In addition, if the black edges in the acquired first picture are distributed left and right, as shown in fig. 5, the area 3 is a black edge, and the area 1 and the area 2 are both actually played pictures, at this time, the comparison unit may be a column comparison unit, a pixel point in a certain column is acquired from the first picture as a current comparison column according to a second preset comparison sequence, and during subsequent comparison of the column comparison unit, the step is the same as the comparison process of the row comparison unit, which is specifically described with reference to the above description, and is not repeated here, and the finally generated first clipping position is a d-line and a c-line. Similarly, if the four sides of the acquired first frame all have black edges, as shown in fig. 5, areas 1 and 3 are black edges, and area 2 is an actual playing area, the comparison unit is divided into a row comparison unit and a column comparison unit for comparison, and the specific comparison process is the same as the row comparison process. Further, if there is no comparison result in the row-by-row comparison when the rows and the columns are compared, the first clipping position includes the line a and the line b, that is, only the results of the row-by-row comparison are included (in this case, it indicates that only the upper and lower black edges may exist in the first frame, and not all the four edges exist).
Optionally, the step of comparing the pixel color value of the current comparison unit with the pixel color value of the adjacent comparison unit of the current comparison unit includes: and judging whether the color value of any pixel point of the current comparison unit is different from the color value of the pixel point adjacent to the any pixel point in the adjacent comparison unit.
Specifically, the row comparison unit is used for explaining, when pixel point color value comparison is carried out, the color value of any one pixel point in a current comparison row is compared with the color value of a pixel point adjacent to the pixel point of the current comparison row in an adjacent row, and whether the color values of the two pixel points are different or not is judged. For example, there are 100 pixel points in the present row of comparing, also there are 100 pixel points in the adjacent row, compare the color value of 1 st pixel point in the row of comparing with the color value of 1 st pixel point in the adjacent row, if the color value is different then judge that a pixel point color value is different, and the same reason carries out the comparison judgement to the color value of two pixel points of 2 nd, 3 rd, 4 th. And counting the comparison results of all the pixel points to determine a first cutting position. It can be understood that the pixel point position factor is added in the process of comparing the color values of the pixel points, so that the first cutting position is determined more accurately.
Further, if the color values of the adjacent pixel points in the adjacent comparison units are the same, the adjacent pixel points with the same color values are determined as one pixel point; if the comparison unit is a row comparison unit, the total amount of the pixels in the adjacent rows is 100, which corresponds to 100 color values, wherein if the color values of the pixels in the adjacent rows with 1 and 2 are (255, 255, 255), the pixel is taken as a pixel, that is, the total amount of the pixels in the adjacent rows is 99. It can be understood that, after the above steps, when color value comparison is performed, the number of the color values of the pixel points in the current comparison row that are different from the color values of the pixel points in the adjacent row is reduced. The misleading of other elements possibly existing in the video black edge to the cutting line can be avoided.
Optionally, the first preset comparison sequence includes: the sequence from the upper and lower edges of the picture to the middle of the picture; or, from the middle of the picture to the sequence of the upper and lower edges of the picture, the second preset comparison sequence includes: the sequence from the left and right edges of the picture to the middle of the picture; or from the middle of the screen to the left and right edges of the screen.
Specifically, taking the first picture and the first preset comparison sequence as an example, the first preset comparison sequence may be divided into two types, one type is a sequence from the upper and lower edges of the first picture to the middle of the first picture, for example, the first picture obtained under normal circumstances is a rectangle, when a comparison unit of a row pixel is used, the current comparison row is obtained from the upper and lower edges of the first picture, further, when the current comparison row is obtained from the upper edge, the adjacent row is at the lower position of the current comparison row, when the current comparison row is obtained from the lower edge, the adjacent row is at the upper position of the current comparison row, for example, if the first picture can be divided into 1 to 10 rows of pixel points, and when the first preset comparison sequence is used, the comparison is started from the 1 st row and the 10 th row, and the adjacent row of the 1 st row is the 2 nd row and the adjacent row of the 10 th row is the 9 th row, if the first clipping position cannot be determined, taking the 2 nd row and the 9 th row as the current comparison row, and taking the adjacent row of the 2 nd row as the 3 rd row and the adjacent row of the 9 th row as the 8 th row, and so on until the comparison of the pixel points is finished. Another first preset comparison sequence is a sequence from the middle of the first frame to the edge of the first frame, and similarly, based on the above example, if the comparison sequence is from the middle to the upper and lower sides, when performing comparison, the comparison is started from the 5 th row and the 6 th row, and the adjacent row of the 5 th row is the 4 th row, the adjacent row of the 6 th row is the 7 th row, and so on, and details are not repeated here. Similarly, based on the above example, there are two second preset comparison orders, one is an order from the left and right edges of the first frame to the middle of the first frame, and the other is an order from the middle of the first frame to the left and right edges of the first frame, and the specific comparison order may refer to the first preset comparison order, and only rows are replaced by columns, which is not described herein again.
Step S30, carrying out black edge recognition on the second picture, and determining a second cutting position of the second picture;
it is understood that, for the specific step of performing black edge recognition on the second picture and determining the second clipping position of the second picture, reference may be made to the step S20, which is not described herein again.
Step S40, determining whether the first cutting position is the same as the second cutting position;
specifically, also based on the above example, the comparing unit is a line comparing unit, the first frame and the second frame are divided into 1 to 10 lines of pixel points, and if it is determined that the line a in the first clipping position is located between the 2 nd line and the 3 rd line, the line b is located between the 8 th line and the 9 th line, the line a in the second clipping position is located between the 4 th line and the 5 th line, and the line b is located between the 6 th line and the 7 th line, it may be determined that the first clipping position and the second clipping position are different.
And step S50, if not, generating a target cutting position according to the first cutting position and the second cutting position.
Specifically, also based on the above example, it is determined that the a-line is located between the 2 nd and 3 rd rows and the b-line is located between the 8 th and 9 th rows in the first clipping position, the a-line is located between the 4 th and 5 th rows and the b-line is located between the 6 th and 7 th rows in the second clipping position. Determining a line a of the target cutting position (a line a of the first cutting position (line 2, line 3), a line a of the second cutting position (line 4, line 5), and obtaining an average line of the line a of the target cutting position (line 3, line 4), namely between the line 3 and the line 4). And similarly, the b line of the target cutting position is determined to be between the 7 th line and the 8 th line.
Further, acquiring a coordinate average value according to the first cutting position and the second cutting position; and determining the coordinate average value as the target cutting position.
Specifically, in this embodiment, when the first clipping position and the second clipping position are determined, the obtained picture may be placed on a coordinate graph, and the first clipping position and the second clipping position are expressed in a coordinate manner, as shown in fig. 7, the first picture is a schematic diagram of the obtained first picture, the first picture is a rectangle, one vertex (vertex at the upper left corner) of the rectangle is used as an origin of coordinates, two sides of the vertex are respectively an X axis and a Y axis, the comparison unit is a row comparison unit, the left end point of a line in the obtained first clipping position is a1, the right end point of B line is B1, two points a1(0,40) and B1(24,80) exist in the coordinate graph at the first clipping position, and an actual playing area generated based on the first picture can be obtained from the two points a1 and B1. Similarly, two points corresponding to the second clipping position obtained based on the second screen on the coordinate graph are two points a2(0,42) and B2(24,84), respectively, and the average values of the coordinates obtained from the first clipping position and the second clipping position are a average value (0,41) and B average value (24,82), so that the a line and the B line of the target clipping position, that is, the target clipping position, can be determined.
And step S60, clipping the image data according to the target clipping position to obtain the clipped image data.
Specifically, based on the above example, if the target trimming position a line is determined to be between the 3 rd line and the 4 th line, the B line is determined to be between the 7 th line and the 8 th line, and the comparison sequence is the first preset comparison sequence from the upper and lower edges of the screen to the middle of the screen, the screen regions corresponding to the regions in the 4 th line to the 7 th line are taken as the actual playing regions, and similarly, if the target trimming position is expressed in a coordinate manner, the regions expressed by the above a-mentioned a-average (0,41) and B-average (24,82) are taken as the actual playing regions, and the actual playing regions are trimmed from the image data, as shown in fig. 5, which is region 2. The display effect of the finally acquired cropped image data on other display devices is shown in fig. 6, and fig. 6 is the display effect of the image data cropped display device. It can be understood that, if the uncut picture includes the parts of the 1 region and the 2 region in fig. 5, the display device adaptively generates a3 region black border when displaying the 1 region and the 2 region, and the picture received by the cut display device includes only the 2 region, while the display device does not generate the 3 region black border when playing only the 2 region picture, and the 2 region, that is, the actually played content, can cover the whole display screen, thereby improving the viewing effect.
It can be understood that, in a video picture with a black border, the color value of the pixel point of the black border portion can hardly change frequently and is usually black, while the color value of the pixel point of the actually played picture portion changes frequently, and when the black border portion enters the actually played picture portion, the color value of the pixel point changes obviously. Therefore, in this embodiment, the picture is acquired from the screen projection data, the obtained picture is subjected to comparison and analysis of the color values of the pixels, the spacing line with obvious color value change serves as a cutting position, the black edge part of the image data in the screen projection data is cut out, and the actual playing area is reserved, so that the actual playing area covers the whole large-screen device, the black edge condition cannot be generated, the display effect during video playing is enlarged, and the viewing experience of a user is improved.
Further, referring to fig. 4, a second embodiment of the screen projection display method of the present invention includes:
step S100, screen projection data are obtained, the screen projection data comprise image data, and a first picture is obtained from the image data at intervals of a preset time period and then a second picture is obtained;
after the first picture is acquired, a second picture is acquired again from the image data at a preset time interval (e.g., at an interval of 200 ms).
Step S200, carrying out black edge recognition on the first picture, and determining a first cutting position of the first picture;
step S300, carrying out black edge recognition on the second picture, and determining a second cutting position of the second picture;
step S400, judging whether the first cutting position is the same as the second cutting position;
step S500, if the image data are different, acquiring a third picture from the image data;
specifically, when the first clipping position is different from the second clipping position, the third screen is acquired again from the image data in order to further ensure the accuracy of the target clipping position.
In addition, if the first clipping position is the same as the second clipping position, the first clipping position or the second clipping position is used as the target clipping position.
It is to be understood that when the first cutting position is the same as the second cutting position, it is determined that the first cutting position and the second cutting position are generated accurately, and either one may be selected as the target cutting position.
Step S501, carrying out black edge recognition on the third picture, and determining a third cutting position of the third picture;
in this embodiment, the specific step of performing black edge recognition on the third picture and determining the third clipping position of the third picture is similar to the step of performing black edge recognition on the first picture and determining the first clipping position of the first picture, and reference may be specifically made to step S20 of the first embodiment, which is not repeated here.
Step S502, obtaining a coordinate average value according to the first cutting position, the second cutting position and the third cutting position, and determining the coordinate average value as the target cutting position;
specifically, if the first cutting position, the second cutting position and the third cutting position are all represented by coordinates, reference may be made to fig. 7, which is a schematic diagram of the obtained first screen, and the comparing unit is a row comparing unit, and a left end point of a line in the obtained first cutting position is a1, a right end point of B line is B1, two points a1(0,40) and B1(24,80) are respectively present in the first cutting position on the coordinate diagram, and two points a2(0,42) and B2(24,84) are respectively present in the second cutting position on the coordinate diagram, and two points A3(0,44) and B3(24,82) are respectively present in the third cutting position on the coordinate diagram, and average values a (0,42) and B (24,82) are obtained, so that a line and B line of the target cutting position can be determined, that is, the target cutting position is determined.
And step S600, cutting the image data according to the target cutting position to obtain the cut image data.
In addition, besides the first picture, the second picture and the third picture are obtained in the sequence, three different pictures are directly captured when the screen projection data are obtained, and an average coordinate value is directly obtained according to three cutting positions generated based on the three pictures. Meanwhile, in this embodiment, the steps similar to those in the first embodiment may refer to the description of the first embodiment, and are not repeated herein.
It can be understood that, in this embodiment, after the first cropping position and the second cropping position are different, the third picture is further obtained, so as to ensure the accuracy of the finally determined actual playing area, and further improve the viewing experience of the user.
In one practical approach, referring to fig. 8, in the actual screen projection scene, the following are included: the mobile phone 100 is in communication connection with the screen projector transmitter 200, the screen projector receiver 300 is in communication connection with the screen projector transmitter 200, and the screen projector receiver 300 is in communication connection with the television 400. When a screen is projected, the screen projector transmitter 200 acquires screen projection data pushed by the mobile phone 100, acquires a first picture and a second picture from image data in the screen projection data, generates a target clipping position of the image data based on the screen projection display method of the present invention, clips the image data according to the target clipping position, pushes the clipped image data to the screen projector receiver 300, and pushes the clipped image data to the television 400 for display by the screen projector receiver 300.
In addition, this embodiment further provides a screen projection display device, as shown in fig. 9, the screen projection display device includes:
the system comprises an acquisition module 10, a display module and a display module, wherein the acquisition module is used for acquiring screen projection data, the screen projection data comprise image data, and a first picture and a second picture are acquired from the image data;
the first identification module 20 is configured to perform black edge identification on the first picture, and determine a first clipping position of the first picture;
a second identifying module 30, configured to perform black edge identification on the second picture, and determine a second clipping position of the second picture;
a judging module 40, configured to judge whether the first clipping position is the same as the second clipping position;
and a generating module 50, configured to generate a target clipping position according to the first clipping position and the second clipping position if the first clipping position and the second clipping position are different.
And a cropping module 60, configured to crop the image data according to the target cropping position, so as to obtain the cropped image data.
Optionally, the first identification module 20 is further configured to:
comparing the color values of the pixel points of the first picture, dividing the pixel points of the first picture into comparison units, and taking the position of the comparison units, in which the color value change degree of the pixel points exceeds a preset threshold value, as the first cutting position.
Optionally, the first recognition module 20 is further configured to:
dividing the pixel points of the first picture into rows according to rows and comparing units;
or/and dividing the pixel points of the first picture into column comparison units according to columns.
Optionally, the first recognition module 20 is further configured to:
when the comparison unit is the row comparison unit, acquiring a current comparison unit according to a first preset comparison sequence, and when the comparison unit is the column comparison unit, acquiring the current comparison unit according to a second preset comparison sequence;
comparing the pixel point color value of the current comparison unit with the pixel point color value of the adjacent comparison unit of the current comparison unit;
if the number of the pixel point color values of the current comparison unit and the pixel point color values of the adjacent comparison unit is different from the preset threshold value, taking the position between the current comparison unit and the adjacent comparison unit as the first cutting position;
if the pixel color value of the current comparison unit is different from the pixel color value of the adjacent comparison unit and does not exceed the preset threshold, the current comparison unit is obtained again until the pixel point of the first picture is traversed.
Optionally, the first identification module 20 is further configured to:
and judging whether the color value of any pixel point of the current comparison unit is different from the color value of the pixel point adjacent to the any pixel point in the adjacent comparison unit.
Optionally, the first preset alignment sequence includes: the sequence from the upper and lower edges of the picture to the middle of the picture; or, from the middle of the picture to the sequence of the upper and lower edges of the picture, the second preset comparison sequence includes: the sequence from the left and right edges of the picture to the middle of the picture; or from the middle of the screen to the left and right edges of the screen.
Optionally, the obtaining module 10 is further configured to:
and acquiring a second picture after acquiring a first picture from the image data at a preset time interval.
Optionally, the generating module 50 is further configured to:
acquiring a coordinate average value according to the first cutting position and the second cutting position;
and determining the coordinate average value as the target cutting position.
Optionally, the generating die 50 is further configured to:
acquiring a third picture from the image data;
carrying out black edge recognition on the third picture, and determining a third cutting position of the third picture;
acquiring a coordinate average value according to the first cutting position, the second cutting position and the third cutting position;
and determining the coordinate average value as the target cutting position.
Optionally, the generating module 50 is further configured to:
and if the first cutting position is the same as the second cutting position, taking the first cutting position or the second cutting position as the target cutting position.
By adopting the screen projection method in the embodiment, the screen projection display device provided by the invention solves the technical problem of poor user experience when the screen is projected by the current screen projection technology. Compared with the prior art, the beneficial effects of the screen projection display device provided by the embodiment of the invention are the same as the beneficial effects of the screen projection method provided by the embodiment, and other technical features of the screen projection display device are the same as the features disclosed by the embodiment method, which are not repeated herein.
In addition, this embodiment also provides a screen projection display device, where the screen projection display device includes: the system comprises a memory, a processor and a screen projection display program stored on the memory and capable of running on the processor, wherein the screen projection display program realizes the steps of the screen projection display method when being executed by the processor.
The specific implementation of the screen projection display device of the present invention is substantially the same as the embodiments of the screen projection display method described above, and is not described herein again.
In addition, the present embodiment also provides a readable storage medium, where a screen projection display program is stored, and when executed by a processor, the screen projection display program implements the steps of the screen projection display method as described above.
The specific implementation manner of the medium of the present invention is substantially the same as that of each embodiment of the screen projection display method, and is not described herein again.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the description of the foregoing embodiments, it is clear to those skilled in the art that the method of the foregoing embodiments may be implemented by software plus a necessary general hardware platform, and certainly may also be implemented by hardware, but in many cases, the former is a better implementation. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, a screen projector, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (13)
1. A screen projection display method is characterized by comprising the following steps:
acquiring screen projection data, wherein the screen projection data comprise image data, and acquiring a first picture and a second picture from the image data;
carrying out black edge recognition on the first picture, and determining a first cutting position of the first picture;
carrying out black edge recognition on the second picture, and determining a second cutting position of the second picture;
judging whether the first cutting position is the same as the second cutting position;
if not, generating a target cutting position according to the first cutting position and the second cutting position;
and according to the target cutting position, cutting the image data to obtain the cut image data.
2. The screen projection display method of claim 1, wherein the step of performing black-edge recognition on the first picture and determining the first cropping position of the first picture comprises:
comparing the color values of the pixel points of the first picture, dividing the pixel points of the first picture into comparison units, and taking the position of the comparison units, in which the color value change degree of the pixel points exceeds a preset threshold value, as the first cutting position.
3. The screen-projection display method of claim 2, wherein the step of dividing the pixel points of the first picture into comparison units comprises:
dividing the pixel points of the first picture into rows according to rows and comparing units;
or/and dividing the pixel points of the first picture into column comparison units according to columns.
4. The screen projection display method according to claim 3, wherein the step of using the position where the degree of change of the color value of the pixel point of the comparison unit exceeds a preset threshold as the first clipping position comprises:
when the comparison unit is the row comparison unit, acquiring a current comparison unit according to a first preset comparison sequence, and when the comparison unit is the column comparison unit, acquiring the current comparison unit according to a second preset comparison sequence;
comparing the pixel point color value of the current comparison unit with the pixel point color value of the adjacent comparison unit of the current comparison unit;
if the number of the pixel point color values of the current comparison unit and the pixel point color values of the adjacent comparison unit is different from the preset threshold value, taking the position between the current comparison unit and the adjacent comparison unit as the first cutting position;
if the pixel color value of the current comparison unit is different from the pixel color value of the adjacent comparison unit and does not exceed the preset threshold, the current comparison unit is obtained again until the pixel point of the first picture is traversed.
5. The screen-casting display method of claim 4, wherein the step of comparing the pixel color values of the current comparing unit with the pixel color values of the neighboring comparing unit of the current comparing unit comprises:
and judging whether the color value of any pixel point of the current comparison unit is different from the color value of the pixel point adjacent to the any pixel point in the adjacent comparison unit.
6. The screen-projection display method of claim 4, wherein the first predetermined comparison sequence comprises: the sequence from the upper and lower edges of the picture to the middle of the picture; or, from the middle of the picture to the sequence of the upper and lower edges of the picture, the second preset comparison sequence includes: the sequence from the left and right edges of the picture to the middle of the picture; or from the middle of the screen to the left and right edges of the screen.
7. The screen-projection display method of claim 1, wherein the step of obtaining a first picture and a second picture from the image data comprises:
and acquiring a second picture after acquiring a first picture from the image data at a preset time interval.
8. The screen-projection display method of claim 1, wherein the step of generating a target clipping position according to the first clipping position and the second clipping position comprises:
acquiring a coordinate average value according to the first cutting position and the second cutting position;
and determining the coordinate average value as the target cutting position.
9. The screen-projection display method of claim 1, wherein the step of generating a target clipping position according to the first clipping position and the second clipping position comprises:
acquiring a third picture from the image data;
carrying out black edge recognition on the third picture, and determining a third cutting position of the third picture;
acquiring a coordinate average value according to the first cutting position, the second cutting position and the third cutting position;
and determining the coordinate average value as the target cutting position.
10. The screen projection display method of claim 1, wherein the method further comprises:
and if the first cutting position is the same as the second cutting position, taking the first cutting position or the second cutting position as the target cutting position.
11. A screen projection display device, comprising:
the system comprises an acquisition module, a display module and a display module, wherein the acquisition module is used for acquiring screen projection data, the screen projection data comprise image data, and a first picture and a second picture are acquired from the image data;
the first identification module is used for carrying out black edge identification on the first picture and determining a first cutting position of the first picture;
the second identification module is used for carrying out black edge identification on the second picture and determining a second cutting position of the second picture;
the judging module is used for judging whether the first cutting position is the same as the second cutting position;
a generating module for generating a target cutting position according to the first cutting position and the second cutting position if the first cutting position and the second cutting position are different
And the cutting module is used for cutting the image data according to the target cutting position so as to obtain the cut image data.
12. An electronic device, characterized in that the electronic device comprises: a memory, a processor and a screen projection display program stored on the memory and executable on the processor, which when executed by the processor implements the steps of the screen projection display method according to any one of claims 1 to 10.
13. A readable storage medium, on which a screen projection display program is stored, which, when executed by a processor, implements the steps of the screen projection display method according to any one of claims 1 to 10.
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