CN112383793A - Picture synthesis method and device, electronic equipment and storage medium - Google Patents

Abstract

The embodiment of the present invention discloses a method, device, electronic device and storage medium for synthesizing a picture. The method includes: receiving layer-related information sent by each client, where the layer-related information includes a live room ID, a layer ID, Layer content, frame serial number SN and video stream ID; according to the live room ID and layer ID, the layer content from each client is merged to obtain the layer merged content; according to the video stream ID and frame serial number SN, from the source video Obtain the target video frame from the file, and combine the layer merge content with the target video frame to obtain a composite picture. In the embodiment of the present invention, each client can realize multi-person interaction under the synchronous live broadcast screen, which not only enriches the interactive mode of live broadcast, but also improves the user experience of interacting and watching live broadcast.

Description

Picture synthesis method, device, electronic device and storage medium

technical field

The present invention relates to the field of Internet technologies, and in particular, to a method, device, electronic device and storage medium for synthesizing pictures.

Background technique

In the field of live video, the interaction methods mainly focus on methods independent of live video streams, such as text interaction in chat rooms and gift-giving interaction. That is, after the interactive object (text, gift-giving message) is sent from the client, it is sent to other clients in the live broadcast room through a separate service of the server, and other clients will display the interactive object after receiving the message. This service does not interact with the live video stream itself. Among them, users interact through text, gift messages, etc., and the interactive methods are not rich enough to play and lack freedom. No matter how the interaction is carried out, it does not affect the live video streaming screen itself; at the same time, because the above interactions are carried by independent services, The live video stream itself is a two-line operation, and it is prone to the situation that the interaction and the picture are out of sync. For example: in the live broadcast of a football match with strong real-time, if several viewers want to discuss the tactical route, they cannot directly interact directly in the live broadcast room by "drawing a tactical board"; If there is a delay in the stream, it may happen that the audience on one end sees the goal and interacts with the text, and the audience with a delay in the live stream on the other end will first see the text interaction and say the goal, and then see the goal on the screen after a period of time. Affect users' viewing and interactive experience.

SUMMARY OF THE INVENTION

Based on the problems existing in the prior art, the embodiments of the present invention provide a method, apparatus, electronic device, and storage medium for synthesizing a picture.

In a first aspect, an embodiment of the present invention provides a method for synthesizing a picture, including:

Receive layer-related information sent by each client, wherein the layer-related information includes live room ID, layer ID, layer content, frame serial number SN and video stream ID;

According to the live room ID and the layer ID, the layer contents from each client are combined to obtain the layer combined contents;

According to the video stream ID and the frame serial number SN, the target video frame is obtained from the source video file, and the layer combination content and the target video frame are combined to obtain a composite picture.

Further, according to the live room ID and the layer ID, the layer contents from each client are combined to obtain the layer combined contents, including:

Determine whether the layer ID exists in the live room;

If the layer ID exists, update the stored layer content;

The stored layer content is superimposed and merged to obtain the layer merged content.

Further, before judging whether the layer ID exists in the live broadcast room, the method further includes: judging whether the live broadcast room corresponding to the live broadcast room ID exists; if the live broadcast room does not exist, creating the live broadcast room in advance.

Further, the superimposing and merging of the stored layer content to obtain the layer merging content includes:

Obtain each user information corresponding to each client, wherein the user information includes the user type, the user level and the current play time;

Sort the layer contents from each client according to the user type, user level and the current playing time, and obtain the sorting result of the layer contents;

According to the sorting result of the layer contents, the stored layer contents are superimposed and merged to obtain the layer merged contents.

Further, according to the video stream ID and the frame sequence number SN, the target video frame is obtained from the source video file, and the layer merged content is merged with the target video frame to obtain a composite picture, including:

Obtain the source video file according to the video stream ID;

Extract the video frame corresponding to the frame sequence number SN from the source video file, and use the video frame as the target video frame;

The combined layer content and the target video frame are superimposed and merged to obtain a composite image, and the composite image is pushed to a pre-created stream address, so that each client can obtain the composite image from the stream address synchronously screen.

Further, before pushing the composite picture to the pre-created stream address, the method further includes:

Create the stream address for the live studio according to the live studio ID, and send to each client a notification of synchronously acquiring the composite picture from the stream address after a predetermined time.

Further, the layer content includes the graffiti content of each client in the corresponding drawing screen, wherein each client obtains the graffiti content by creating a drawing screen overlaid on the live screen area for graffiti.

In a second aspect, an embodiment of the present invention further provides an apparatus for synthesizing a picture, including:

a receiving module, configured to receive layer-related information sent by each client, wherein the layer-related information includes live room ID, layer ID, layer content, frame serial number SN and video stream ID;

The layer merging module is used for merging the layer contents from each client according to the live room ID and the layer ID to obtain the layer merging contents;

The picture synthesis module is configured to obtain the target video frame from the source video file according to the video stream ID and the frame serial number SN, and combine the layer combination content with the target video frame to obtain a composite picture.

In a third aspect, an embodiment of the present invention further provides an electronic device, including a memory, a processor, and a computer program stored in the memory and running on the processor, the processor implementing the computer program as described in the first In one aspect, the method for synthesizing a picture is described.

In a fourth aspect, an embodiment of the present invention further provides a non-transitory computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, implements the method for synthesizing a picture according to the first aspect.

It can be seen from the above technical solutions that with the method, device, electronic device, and storage medium for synthesizing a picture provided in the embodiment of the present invention, when a user watches a live broadcast in the live broadcast room, he can do any graffiti on the live broadcast picture to obtain the layer content, and the server can compose the layer content. The layer content of each client is merged and sent to each client together with the live broadcast screen, so that each client can realize multi-person interaction under the synchronous live broadcast screen, which not only enriches the interactive mode of live broadcast, but also improves the It improves the user experience of interacting and watching live broadcasts.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative efforts.

1 is a flowchart of a method for synthesizing a picture provided by an embodiment of the present invention;

2 is a schematic diagram of a storage structure of layer content of a method for synthesizing a picture provided by an embodiment of the present invention;

3 is a structural block diagram of an apparatus for synthesizing a picture provided by an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of an electronic device provided by an embodiment of the present invention.

Detailed ways

The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. The following examples are only used to illustrate the technical solutions of the present invention more clearly, and cannot be used to limit the protection scope of the present invention.

The following describes a method, an apparatus, an electronic device, and a storage medium for synthesizing a picture according to the embodiments of the present invention with reference to the accompanying drawings.

FIG. 1 shows a flowchart of a method for synthesizing a picture provided by an embodiment of the present invention. As shown in FIG. 1 , the method for synthesizing a picture provided by an embodiment of the present invention specifically includes the following content:

S101: Receive layer-related information sent by each client, where the layer-related information includes a live room ID, a layer ID, a layer content, a frame serial number SN, and a video stream ID.

In this example, each client refers to the clients of multiple users who enter the same live broadcast room and participate in the live broadcast. The client can be an application APP installed on a device such as a smartphone, a tablet computer, etc., such as a live broadcast software.

As a specific example, when multiple people connect to the live broadcast room through their respective clients to watch the live broadcast simultaneously, the pictures of each client terminal include the live broadcast picture and the multi-person real-time drawing picture, and the drawing picture is superimposed on the live broadcast picture. E.g:

The user clicks the drawing button in the client. At this time, the client creates a drawing layer with a transparent background (ie: drawing screen) to cover the area of the live screen, and regularly uploads the information in the drawing layer (ie: layer-related information) ) to the server.

In this example, the user can doodle arbitrarily on the drawing layer, that is, the content of the layer includes the graffiti content of each client in the corresponding drawing screen, wherein each client performs the drawing by creating a drawing screen overlaid on the live screen area. Graffiti gets the graffiti content.

The client uploads layer-related information to the server at regular intervals (for example, every 40 milliseconds, that is, 25 frames per second).

The uploaded layer-related information includes, but is not limited to: layer ID (for example, consisting of "live room ID and user ID"), compressed layer content, and current frame serial number (that is, which frame is the video stream played to? ), video stream ID, live room ID, user token, etc. Among them, compression can increase the amount of data transmission and improve transmission efficiency.

S102: Combine the layer contents from each client according to the live room ID and the layer ID to obtain the layer combined contents.

In a specific example, this step specifically includes: judging whether the layer ID exists in the live room; if the layer ID exists, judging whether the layer content corresponding to the layer ID has been stored; If the layer content exists, the stored layer content is updated; and the stored layer content is superimposed and merged to obtain the layer merged content.

In this example, when it is determined that there is no layer content stored, it means that the layer content is new layer content. Therefore, the layer content is updated, that is, the updated layer content is stored. In this way, subsequent The stored layer content can be read out and superimposed and merged to obtain the layer merged content.

Further, before judging whether the layer ID exists in the live broadcast room, the method further includes: judging whether the live broadcast room corresponding to the live broadcast room ID exists; if the live broadcast room does not exist, creating the live broadcast room in advance.

As a specific example, when the server receives the layer-related information sent by the client, it first takes out the live room ID, layer ID, and layer content; judges whether the live room ID exists in the memory, that is, judges whether the live room ID exists. The live room corresponding to the live room ID, if not, create a live room; determine whether the layer ID exists in the live room; Check whether the content of the layer passed in from the terminal is the same, if it is different, update the content of the layer, and then continue to the next step; if not, store the content of the layer in the memory of the live room and continue to the next step; take out the content of the layer in the live room All canvas contents are layered and combined, and the combined contents (layer combined contents) are stored in the live studio.

Among them, the main function is to superimpose and mix the canvas layers submitted by multiple people to generate a canvas mixed layer. This algorithm is triggered to update the blend layer content whenever the user submits the canvas layer content. Its storage structure is shown in Figure 2. In Figure 2, for live room 1, the layer content sent by each client is called canvas layer 1 content, canvas layer 2 content, etc., and the layer combined content is called mixed. After the canvas content. That is: in the memory of the server, the groups are grouped by the ID of the live broadcast room, and all the canvas layer information and mixed layer information related to the live broadcast room are stored in the live broadcast room.

S103: Obtain a target video frame from the source video file according to the video stream ID and the frame serial number SN, and combine the layer combination content with the target video frame to obtain a composite picture.

Specifically, this step specifically includes: obtaining the source video file according to the video stream ID; extracting the video frame corresponding to the frame serial number SN from the source video file, and using the video frame as the target video frame; superimpose and merge the layer combination content and the target video frame to obtain a composite picture, and push the composite picture to the pre-created stream address, so that each client can obtain all the data from the stream address synchronously. Describe the composite screen.

Wherein, before pushing the composite picture to the pre-created stream address, the method further includes: creating the stream address for the live studio according to the live studio ID, and sending a predetermined time to each client Then, the notification of the composite picture is obtained synchronously from the stream address.

As a specific example, this step is implemented as follows:

1. Obtain the frame serial number SN, live room ID, and video stream ID sent by the client.

2. Create a new stream address for the live studio, and notify the client to pull the stream from the new stream address after 40 milliseconds. Among them, 40 milliseconds is only an example, and can be set according to needs.

3. Extract the frame whose frame number is SN from the source video file.

4. Obtain the mixed canvas content corresponding to the live room from the memory.

5. Superimpose and merge the canvas content and the frame content, and compress the mixed frame encoding and push it to a new stream address.

6. Set the frame sequence number SN as: SN=SN+1.

7. Execute the above steps 3-6 in a loop until the last frame is processed by the live broadcast.

Therefore, each client can perform synchronous live broadcast, and the interaction of each client in the live broadcast room can be displayed synchronously.

According to the method for synthesizing a picture in the embodiment of the present invention, when a user watches a live broadcast in the live broadcast room, he can do any graffiti on the live broadcast picture to obtain the layer content, and the server can combine the layer content of each client and combine it with the live broadcast picture. And distributed to each client, thus, each client can realize multi-person interaction under the synchronous live broadcast screen, which not only enriches the interactive mode of live broadcast, but also improves the user experience of interaction and watching live broadcast.

In an embodiment of the present invention, the superimposing and merging of the stored layer contents to obtain the layer merged content includes: acquiring each user information corresponding to each client, wherein the user information includes a user type , user level and this play time; sort the layer content from each client according to the user type, user level and this play time, and obtain the sorting result of the layer content; according to the sorting result of the layer content , and superimpose and merge the stored layer content to obtain the layer merged content. Wherein, according to the sorting result of the layer contents, superimposing and merging the stored layer contents to obtain the layer merging contents can be realized in the following two ways:

Obtain the overlapping content in the content of the layer in the top sorting and the content in the layer in the later sorting, and cover the overlapping content in the content of the layer in the later sorting by the overlapping content in the content of the layer in the sorting earlier. content; or,

Except for the graffiti part, the layer contents are all transparent areas, and the layer contents in the lower order are superimposed first, and then the layer contents in the front order are superimposed. Since the layer contents except the graffiti part are all transparent areas, therefore, in the superimposed layer contents, when the layer contents in the first order and the layer contents in the rear order overlap, only the overlapping part will be displayed. Sort the top layer contents. For example: in the same area, the graffiti of the layer content in the top order is "Come on", and the graffiti of the layer content in the lower order is "6666", then after superimposing, only "Come on" is displayed in this area.

That is to say, there are differences in the arrangement order of the layers among the drawing layers. The higher the sorting, the higher the display will be when the drawing layers are superimposed. For example: sort three drawing layers of 1, 2, 3, 3 on the bottom layer, 2 on top of 3, 1 on top of 2. Drawing on the non-transparent part of the upper layer will obscure the lower layer.

The ordering of the drawing layer is determined by its associated user data, which is jointly controlled by three parameters: whether it is the owner of the live room, the user level, and the last time the user entered the live room.

Among them, the owner of the live broadcast room is defined as the user who opened the live broadcast room, and is the owner of the live broadcast room.

User level definition: the level of the user in the product, which is determined by the user's activity in the product. The level increases with the accumulation of experience points, and active behaviors can obtain experience points. Active behaviors include but are not limited to watching live broadcasts, starting live broadcasts, chatting and text interaction, etc.

The function logic of the three parameters is as follows: if it is the owner of the live broadcast room, it will always be ranked at the top, which is 1; if it is not the owner of the live broadcast room, the next step will be judged; among non-homeowner users, the user level is ranked from high to low. Sorting, one-to-one corresponding serial numbers such as 2, 3, 4; if there are users with the same level, the next step will be judged; among those with the same user level, they will be sorted from early to late according to the time they last entered the live broadcast room, and the corresponding Serial number, the time is accurate to the second; if the time is the same, it will be sorted randomly. All drawing layer sizes are generated according to the live stream screen size, with the same width and height. Set the upper left corner of the live screen as the anchor point, with coordinates [0, 0], so that the top left corner of the drawing layer is aligned with [0, 0], so that the drawing layer and the live screen area overlap.

FIG. 3 shows a schematic structural diagram of an apparatus for synthesizing a picture provided by an embodiment of the present invention. As shown in FIG. 3 , the apparatus for synthesizing a picture provided by an embodiment of the present invention includes: a receiving module 310 , a layer merging module 320 , and a picture Synthesis module 330 . in:

The receiving module 310 is configured to receive the layer-related information sent by each client, wherein the layer-related information includes the live room ID, the layer ID, the layer content, the frame serial number SN and the video stream ID;

The layer merging module 320 is used for merging the layer contents from each client according to the live room ID and the layer ID to obtain the layer merging contents;

The picture synthesis module 330 is configured to obtain the target video frame from the source video file according to the video stream ID and the frame sequence number SN, and combine the layer combination content with the target video frame to obtain a composite picture .

According to the device for synthesizing images in the embodiment of the present invention, when a user watches a live broadcast in the live broadcast room, he can do any graffiti on the live broadcast image to obtain layer contents, and the server can combine the layer contents of each client and combine them with the live broadcast image. And distributed to each client, thus, each client can realize multi-person interaction under the synchronous live broadcast screen, which not only enriches the interactive mode of live broadcast, but also improves the user experience of interaction and watching live broadcast.

It should be noted that the specific implementation of the apparatus for synthesizing a picture in the embodiment of the present invention is similar to the specific implementation of the method for synthesizing a picture in the embodiment of the present invention. For details, please refer to the description in the method section. I won't go into details.

Based on the same inventive concept, another embodiment of the present invention provides an electronic device, see FIG. 4 , the electronic device specifically includes the following: a processor 401, a memory 402, a communication interface 403, and a communication bus 404;

Wherein, the processor 401, the memory 402, and the communication interface 403 complete the communication with each other through the communication bus 404; the communication interface 403 is used to realize the information transmission between the devices;

The processor 401 is configured to call a computer program in the memory 402, and when the processor executes the computer program, all steps of the above-mentioned method for synthesizing a picture are realized. For example, when the processor executes the computer program, it realizes Following steps: broadcast room ID, layer ID, layer content, frame serial number SN and video stream ID; according to described live room ID and layer ID, the layer content from each client is merged to obtain layer combination content; according to the video stream ID and the frame serial number SN, obtain the target video frame from the source video file, and combine the layer combination content with the target video frame to obtain a composite picture.

Based on the same inventive concept, another embodiment of the present invention provides a non-transitory computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the above-mentioned pictures are synthesized All steps of the method, for example, the processor implements the following steps when executing the computer program: studio ID, layer ID, layer content, frame serial number SN and video stream ID; Layer ID, merge the layer contents from each client to obtain the layer merge content; according to the video stream ID and the frame serial number SN, obtain the target video frame from the source video file, and combine the layers The content is combined with the target video frame to obtain a composite picture.

In addition, the above-mentioned logic instructions in the memory can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present invention can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, Read-Only Memory (ROM, Read-Only Memory), Random Access Memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes .

The device embodiments described above are only illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in One place, or it can be distributed over multiple network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solutions of the embodiments of the present invention. Those of ordinary skill in the art can understand and implement it without creative effort.

From the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and certainly can also be implemented by hardware. Based on this understanding, the above-mentioned technical solutions can be embodied in the form of software products in essence or the parts that make contributions to the prior art, and the computer software products can be stored in computer-readable storage media, such as ROM/RAM, magnetic A disc, an optical disc, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the indicator monitoring method described in each embodiment or some part of the embodiment.

In addition, in the present invention, such as "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.

Furthermore, in the present invention, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply existence between these entities or operations any such actual relationship or sequence. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

In addition, in the description of this specification, reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples" and the like means description in conjunction with the embodiment or example. A particular feature, structure, material or characteristic is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples, without conflicting each other.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it can still be The technical solutions described in the foregoing embodiments are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A method for synthesizing a picture, comprising:

receiving layer related information sent by each client, wherein the layer related information comprises a direct broadcast room ID, a layer ID, layer content, a frame serial number SN and a video stream ID;

merging the layer contents from each client according to the live broadcast room ID and the layer ID to obtain layer merged contents;

and acquiring a target video frame from a source video file according to the video stream ID and the frame sequence number SN, and merging the layer merging content and the target video frame to obtain a synthesized picture.

2. The picture synthesis method according to claim 1, wherein the merging layer contents from each client according to the live broadcast room ID and the layer ID to obtain layer merged contents comprises:

judging whether the layer ID exists in a live broadcast room or not;

if the layer ID exists, judging whether the layer content corresponding to the layer ID exists;

if the layer content is not stored, updating the stored layer content;

and superposing and combining the stored layer contents to obtain the layer combined contents.

3. The method of synthesizing a screen according to claim 2, further comprising, before determining whether the layer ID exists in a live broadcast room:

judging whether a live broadcast room corresponding to the live broadcast room ID exists or not;

and if the live broadcast room does not exist, creating the live broadcast room in advance.

4. The picture synthesis method according to claim 2 or 3, wherein the superimposing and combining the stored layer contents to obtain the layer-combined contents includes:

acquiring user information corresponding to each client, wherein the user information comprises a user type, a user grade and the playing time;

sequencing the layer contents from each client according to the user type, the user grade and the playing time to obtain a sequencing result of the layer contents;

and according to the sequencing result of the layer contents, overlapping and combining the stored layer contents to obtain the layer combined contents.

5. The picture synthesizing method according to claim 1, wherein the obtaining a target video frame from a source video file according to a video stream ID and the frame number SN, and merging the layer merging content with the target video frame to obtain a synthesized picture comprises:

obtaining the source video file according to the video stream ID;

extracting the video frame corresponding to the frame sequence number SN from the source video file, and taking the video frame as the target video frame;

and superposing and combining the layer combination content and a target video frame to obtain a combined picture, and pushing the combined picture to a pre-established stream address so that each client can synchronously acquire the combined picture from the stream address.

6. The picture synthesis method according to claim 5, wherein before pushing the synthesized picture to a stream address created in advance, the method further comprises:

and creating the stream address for the live broadcast room according to the ID of the live broadcast room, and sending a notice for synchronously acquiring the synthesized picture from the stream address after preset time to each client.

7. The picture synthesis method according to claim 1, wherein the layer content includes a graffiti content of each client in the corresponding drawing picture, wherein the graffiti content is obtained by each client by creating the drawing picture overlaid on a live-broadcast picture area.

8. An apparatus for composing a screen, comprising:

the system comprises a receiving module, a sending module and a receiving module, wherein the receiving module is used for receiving layer related information sent by each client, and the layer related information comprises a direct broadcast room ID, a layer ID, layer content, a frame serial number SN and a video stream ID;

the layer merging module is used for merging the layer contents from the clients according to the live broadcast room ID and the layer ID to obtain layer merged contents;

and the picture synthesis module is used for acquiring a target video frame from a source video file according to the video stream ID and the frame sequence number SN, and merging the layer merging content and the target video frame to obtain a synthesized picture.

9. An electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor implements the method for synthesizing a picture according to any one of claims 1 to 7 when executing the computer program.

10. A non-transitory computer-readable storage medium having stored thereon a computer program, wherein the computer program, when executed by a processor, implements the picture composition method according to any one of claims 1 to 7.

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