WO2018196472A1

WO2018196472A1 - Projection method, apparatus and system, and storage medium

Info

Publication number: WO2018196472A1
Application number: PCT/CN2018/076995
Authority: WO
Inventors: 赵冬晓; 尹志良
Original assignee: 中兴通讯股份有限公司
Priority date: 2017-04-24
Filing date: 2018-02-23
Publication date: 2018-11-01
Also published as: CN108737799A

Abstract

Provided is a projection method, comprising: acquiring an initial projection image formed by initial projections of at least two projection devices; determining, from the initial projection image, at least two projection regions corresponding to the at least two projection devices, and determining the largest inscribed rectangular region composed of the at least two projection regions to be a target projection region; according to the relative position relationship between the at least two projection regions and the target projection region, determining, from an image to be projected, sub-images to be projected which respectively correspond to the at least two projection devices; and respectively controlling the at least two projection devices such that same project the sub-images to be projected which respectively correspond thereto. Also disclosed are a projection apparatus, a projection system and a storage medium.

Description

Projection method, device, system and storage medium

Cross-reference to related applications

The present application is based on a Chinese patent application filed on Jan. 24, 2017, the filing date of which is hereby incorporated by reference.

Technical field

The present disclosure relates to the field of terminal projection, and in particular, to a projection method, apparatus, system, and storage medium.

Background technique

In recent years, with the rapid growth of information and the rapid development of information bearing and transmission technologies, people have increasingly demanded the resolution, display efficiency and visual effects of display devices. Although the traditional single projector is reasonable in price, the resolution is relatively low, which can not meet the needs of the market; while the multi-screen splicing display realizes high-resolution display of images, the price is very expensive and cannot be widely popularized. application. Therefore, multi-projection splicing technology is a comprehensive technology that weighs the price and high-resolution display. The projection method of splicing projection using multiple common projectors to project the image to be projected is favored by people.

The specific method of using the multi-projector for splicing projection in the related art is as follows: first, the user first divides an image to be projected by a computer according to the splicing requirement; secondly, transmits the segmented image to a plurality of projectors; and then, controls A plurality of projectors project corresponding segmentation images. Therefore, in the prior art, the collaborative projection process of the multi-projector must be manually controlled, and at the same time, the projection result needs to be manually adjusted. When the number of projectors is large, the method of manually controlling the projection of the multi-projector is time-consuming and labor-intensive, resulting in Projection of multi-projector collaborative projection is less efficient.

Summary of the invention

In view of this, embodiments of the present disclosure are intended to provide a projection method, apparatus and system, and storage medium.

The technical solution of the embodiment of the present disclosure is implemented as follows:

In a first aspect, an embodiment of the present disclosure provides a projection method, including: acquiring an initial projection image formed by initial projection of at least two projection devices; and determining at least two projection regions corresponding to at least two projection devices from the initial projection image. And determining, as the target projection area, a maximum inscribed rectangular area formed by the at least two projection areas; determining, according to the relative positional relationship of the at least two projection areas and the target projection area, at least two projection devices respectively corresponding to the image to be projected The sub-image to be projected; respectively controlling at least two projection devices to project respective sub-images to be projected.

In a second aspect, an embodiment of the present disclosure provides a projection apparatus, including: an acquisition module configured to acquire an initial projection image formed by initial projection of at least two projection devices by an image acquisition unit; the first processing module is configured to be initial Determining at least two projection areas corresponding to at least two projection devices in the projection image, and determining a maximum inscribed rectangular area formed by the at least two projection areas as a target projection area; and a second processing module configured to according to at least two projections a relative positional relationship between the area and the target projection area, determining a sub-image to be projected corresponding to each of the at least two projection devices from the image to be projected; and the control module is configured to respectively control at least two projection devices to project the corresponding sub-images to be projected.

In a third aspect, an embodiment of the present disclosure provides a projection system, the system comprising: a camera configured to acquire an initial projection image formed by initial projection of at least two projection devices; and a control device configured to determine from the initial projection image At least two projection areas corresponding to at least two projection devices, and determining a maximum inscribed rectangular area formed by the at least two projection areas as a target projection area; according to a relative positional relationship between the at least two projection areas and the target projection area, Determining a sub-image to be projected corresponding to each of the at least two projection devices; respectively controlling at least two projection devices to project respective sub-images to be projected; at least two projection devices configured as initial projections; Corresponding sub-images to be projected.

The projection method, device, system and storage medium provided by the embodiments of the present disclosure firstly acquire an initial projection image formed by initial projection of at least two projection devices; secondly, determine a projection area corresponding to each projection device from the initial projection image and Target projection area; then, according to the relative positional relationship between each projection area and the target projection area, determining a sub-image to be projected corresponding to each projection device from the image to be projected; finally, respectively controlling each projection device to project a corresponding sub-projection Image, the process does not require manual operation, and the cooperative projection of multi-projection equipment can be realized only by means of software control, thereby improving the intelligence degree of collaborative projection of multi-projection equipment, and further improving the projection of cooperative projection of multi-projection equipment. effectiveness.

DRAWINGS

1 is a first structural schematic view of a projection system in an embodiment of the present disclosure;

2 is a second schematic structural diagram of a projection system in an embodiment of the present disclosure;

3 is a schematic structural diagram of a main projection device in a projection system according to an embodiment of the present disclosure;

4 is a schematic diagram of a first flow of a projection method in an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of a first projection image of a projection method in an embodiment of the present disclosure; FIG.

6 is a schematic diagram of a second projection image of a projection method in an embodiment of the present disclosure;

7 is a schematic diagram of a third projection image of a projection method in an embodiment of the present disclosure;

8 is a second schematic flowchart of a projection method in an embodiment of the present disclosure;

FIG. 9 is a schematic diagram of a fourth projection image of a projection method in an embodiment of the present disclosure; FIG.

FIG. 10 is a third schematic flowchart of a projection method in an embodiment of the present disclosure;

11 is a fourth schematic flowchart of a projection method in an embodiment of the present disclosure;

FIG. 12 is a schematic structural diagram of a projection apparatus in an embodiment of the present disclosure.

detailed description

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure.

Embodiment 1:

The embodiment of the present disclosure provides a projection method applied to a projection system. As shown in FIG. 1 , the projection system 10 includes a camera 11 , a control device 12 , and at least two projection devices 13 .

The control device 12 and the projection device 13 may be physically separated or physically combined. When the control device 12 and the projection device 13 are physically separated, the camera 11 can be disposed on the control device 12. At this time, the projection process of each projection device 13 is controlled by the control device 12, and the camera 11 is controlled to collect the initial projection of each projection device. The initial projected image formed, where the control device 12 can be a mobile phone, a tablet computer, a notebook computer, etc.; when the control device 12 and the projection device 13 are physically combined, the camera 11 is disposed on the projection device 13, In this case, the projection device 13 can be referred to as a main projection device, and other projection devices are referred to as respective slave projection devices.

Referring to FIG. 2, the projection system includes four projection devices, wherein D0 represents a first projection device, D1 represents a second projection device, D2 represents a third projection device, and D3 represents a fourth projection device. The control device and D0 are physically combined, and the camera is set on D0, and the position of the camera can be in the same plane as the D0 optical machine (Fig. 2 is the main view of each projection device, wherein the circle on the main view of D0) Representing the camera, the rectangle represents the optical machine). At this time, D0 can be used as the main projection device, D1, D2 and D3 as the slave projection devices, the master and slave devices are connected, and D0 controls itself and the projection process of each slave projector device, and The initial projection image is acquired by the D0 control camera.

In practical applications, multiple projection devices are connected in a wired manner. In this way, problems such as loose connection pins or poor contact may occur, resulting in multi-projection devices failing to cooperate with projection. To this end, the multi-projection devices in this embodiment can be connected by wireless, for example, through a wireless mirror connection technology, to realize sharing of information between the projection devices. Still using four projection devices as an example, here, D0 is used as the main projection device, and is connected to each of the slave projection devices D1, D2, and D3 by wireless mirror connection technology. At this time, the main projection device is the transmitting end, and the receiving device is receiving from the projection device. At the end, the main projection device controls itself and the output image of each of the slave projection devices.

Further, the projection method of the embodiment is further described by the physical combination of the control device and the projection device. Referring to FIG. 3, at this time, the control device and the D0 are physically combined, in the D0. The CPU (Central Processing Unit) module 121, the display control module 122, and the communication interface 123 can be regarded as a whole, which is equivalent to a control device, wherein the CPU module 121 serves as a total control module and is responsible for controlling the projection of each device. Content, the display control module 122 controls the optical device 124 of the D0 to perform projection, and the communication interface of the D0 may be a wireless communication interface, and then communicates with each of the slave projection devices through the wireless network to control the projection of each of the slave projection devices. At this time, the D0 passes the wireless. The mirror connection mode is connected to D1, D2, and D3, respectively, and the image divided by the CPU module of D0 is transmitted to D1, D2, and D3, and the delay between D0 and D1, D2, and D3 is controlled by the CPU module to ensure each projection device. Synchronous display of collaborative projection screens.

The projection method provided by the embodiment of the present disclosure will be described below in conjunction with the above system.

Referring to FIG. 4, it is a schematic flowchart of a projection method provided by an embodiment of the present disclosure. The method can be applied to scenes that need to display data or display images on a large screen, such as displaying military simulation, industrial design, and virtual When manufacturing, engineering projection, complex monitoring, etc. related images, the method includes:

S40: Acquire an initial projection image formed by initial projection of at least two projection devices;

Here, taking multiple projection devices for collaborative projection in a large conference as an example, after placing a plurality of projection devices, first, a plurality of projection devices are turned on; then, multiple projection devices perform initial projection; and then, acquired by an image acquisition module. The initial projected image formed by the initial projection of multiple projection devices.

In this embodiment, at least two projection devices can be used for initial projection. In an embodiment, since the aspect ratio of the common image is mostly the square of the natural number, the number of projection devices can also take the square of the natural number. For example, 4 or 9 projection devices are used for initial projection to improve the projection effect of multi-projection device collaborative projection. Here, taking four projection devices as an example, as shown in FIG. 3 and FIG. 5, FIG. 3 is four projection devices D0, D1, D2, and D3 for initial projection, and FIG. 5 is the above four projection devices collected by the camera. An initial projection image formed by the initial projection, the edge of the initial projection image being composed of edges of the projection area of each projection device. For convenience of explanation, FIG. 5 distinguishes the projection edges of the projection devices by different line types, for example, The line type indicated by 501 represents the projection edge of D0; the line type indicated by 502 represents the projection edge of D1; the line type indicated by 503 represents the projection edge of D2; and the line type indicated by 504 represents the projection edge of D3.

S41: determining at least two projection regions corresponding to the at least two projection devices from the initial projection image, and determining a maximum inscribed rectangular region formed by the at least two projection regions as the target projection region;

Here, after the initial projection image is acquired by the S40, the control device may identify at least two projection regions corresponding to at least two projection devices in the initial projection image by using an image recognition algorithm, and calculate by an edge recognition algorithm or a mathematical algorithm for finding a maximum rectangle. A maximum inscribed rectangular area composed of at least two projection areas is used, and this maximum inscribed rectangular area is used as a target projection area.

Referring to FIG. 3 and FIG. 6, at this time, the control device and D0 are physically combined, and D0 is used as the main projection device. After the camera captures the initial projection image, the CPU module of D0 processes the initial projection image, first. The projection area D0' corresponding to D0 in the initial projection area, the projection area D1' corresponding to D1, the projection area D2' corresponding to D2, and the projection area D3' corresponding to D3 are identified by the image recognition algorithm; secondly, respectively, D0', D1', D2', and D3' perform edge recognition to obtain four edges of each projection area; then, extend the line where the lower edge of D0' and D1' are in the upper edge, and D2' and D3' The line of the higher edge of the lower edge is extended, and the line of the right edge of the left edge of D0' and D2' is extended, and the left edge of the right edge of D1' and D3' is located. The straight line is extended; finally, the rectangular area composed of the four extension lines is determined as the target projection area, and as shown in FIG. 7, the target projection area is the rectangular area P.

Of course, a person skilled in the art can also set a calculation method according to actual needs to identify at least two projection areas corresponding to at least two projection devices in the initial projection image and to obtain a maximum inscribed rectangular area in the initial projection image. The embodiment of the present disclosure is not specifically limited.

S42: Determine, according to a relative positional relationship between the at least two projection areas and the target projection area, a sub-image to be projected corresponding to each of the at least two projection devices from the image to be projected;

Here, after S41 determines four projection areas D0', D1', D2', and D3' corresponding to the four projection devices D0, D1, D2, and D3, and the target projection area P, the control device may be based on the target projection area P. With the overlapping area and the non-overlapping area between the respective projection areas D0', D1', D2', and D3', the sub-images to be projected corresponding to the respective projection devices are acquired from the image to be projected.

In an embodiment, referring to FIG. 8, S42 may include the following steps:

S801: divide the image to be projected according to a relative positional relationship between the at least two projection areas and the target projection area, to obtain a first area corresponding to each of the at least two projection devices;

Here, the control device first acquires an area overlapping each of the projection area and the target projection area. Referring to FIG. 9, the area overlapped between D0' and P is C0, and the area overlapped between D1' and P is C1. The area overlapped between D2' and P is C2, and the area overlapped between D3' and P is C3; then, the control device divides the image to be projected according to C0, C1, C2, and C3, and obtains the corresponding number of the four projection devices. One area, that is, the divided images corresponding to the four projection devices.

S802: determining, respectively, an area that is not overlapped between the at least two projection areas and the target projection area as a second area corresponding to each of the at least two projection devices, where image parameter values of the respective pixels in the second area are the same;

Here, after the control device has determined the regions C0, C1, C2, and C3 in which the four projection regions and the target projection region P overlap each other, the regions between the four projection regions and the target projection region P that are not overlapped may be determined. For the second region, as shown in FIG. 9, K0, K1, K2, and K3 in the figure are all the second regions. Since the image to be projected is finally projected into the target projection area, for the second area projected by each projection device outside the target projection area, the image parameter values of the respective pixel points therein may be uniformly set. Here, Image parameters may include: pixels, saturation, hue, and the like. For example, the pixel value of each pixel in the second area may be set to black, so that the projection content of the second area will be concise and consistent, and will not have a visual impact on the projected content in the target projection area, thereby improving the coordination. The projection effect of the projection.

S803: Obtain a sub-image to be projected corresponding to each of the at least two projection devices according to the first region and the second region.

Here, the control device divides the image to be projected according to C0, C1, C2, and C3, and obtains a first divided image corresponding to D0, a second divided image corresponding to D1, a third divided image corresponding to D2, and a fourth divided image corresponding to D3. Then, according to each divided image and the second region, the sub-images to be projected corresponding to D0, D1, D2, and D3, respectively, are obtained.

S43: Control at least two projection devices respectively to respectively project corresponding sub-images to be projected.

Here, it can be understood that, on the basis of S803, the process in which the control device controls each of the projection devices to project the corresponding sub-images to be projected in S43 can be realized by the following two methods:

First, the control device controls each projection device to project the respective divided images, and uniformly fills each of the projection regions and the second region where the target projection regions are not overlapped, so as to realize projection of the corresponding sub-images to be projected by the respective projection devices. purpose.

Secondly, for each projection device, the respective divided images are spliced with the corresponding second regions, and the sub-images to be projected corresponding to the respective projection devices are obtained, and then cooperative projection is performed.

In an actual application, when an overlapping area occurs between the projection areas of the initial projection, if the relative positional relationship between each projection area and the target projection area is determined, the sub-image to be projected corresponding to each projection device is determined from the image to be projected, and then The sub-images to be projected corresponding to the projections of the projection devices are controlled. Then, overlapping images may also appear in the images jointly projected by the multi-projection device, which affects the projection effect. Therefore, in the embodiment, when an overlapping area occurs between the projection areas of the initial projection, the projection image is processed first, and then the processed image to be projected is divided, and finally the technical effect of the non-overlapping projection is realized. Therefore, in this embodiment, referring to FIG. 10, S801 may include:

S1001: determining, as each third region, an area in which at least two projection areas in the target projection area overlap each other;

Here, the control device determines, as the respective third region, an area in which each of the projection areas in the target projection area overlap each other, and the third area is an area jointly projected by the multi-projection device, and the pixel value of each pixel in the area is more The projection device projects the superimposed pixel values. Referring to FIG. 9, the areas where the four projection areas D0', D1', D2', and D3' overlap each other include: S1, S2, S3, S4, S5, and S6.

S1002: Obtain a number of projection devices corresponding to each third area;

Here, the control device acquires the number of projection devices corresponding to each third region, and further knows that the pixel value of the pixel in the third region is a pixel value obtained by superimposing and superimposing a plurality of projection devices. For example, if the control device acquires an area where S1 is a common projection of D0 and D2, the pixel value of the pixel in S1 is the pixel value obtained by the projection of 2 projection devices; S2 is the area jointly projected by D0 and D1, then S2 The pixel value of the pixel inside is the pixel value obtained by the projection of 2 projection devices; S3 is the area jointly projected by D1 and D3, and the pixel value of the pixel in S3 is the pixel obtained by the projection of 2 projection devices. Value; S4 is the area jointly projected by D2 and D3, then the pixel value of the pixel in S4 is the pixel value obtained by the projection of 2 projection devices; S5 is the area jointly projected by D1, D2 and D3, then the area in S5 The pixel value of the pixel is the pixel value obtained by the projection of the three projection devices; S6 is the area jointly projected by D0, D2 and D3, and the pixel value of the pixel in S6 is the pixel obtained by the projection of the three projection devices. value.

S1003: processing the image to be projected based on the number of projection devices;

Here, after obtaining the number of projection devices corresponding to each third region, the control device may process the image to be projected according to the number of projection devices, and the processing procedure is as follows:

a first step: determining, according to a mapping relationship between the image to be projected and the target projection area, a fourth region corresponding to each third region from the image to be projected;

Here, the mapping relationship between the image to be projected and the target projection area is first established; and according to the established mapping relationship, the fourth area corresponding to each third area is determined from the image to be projected, and the fourth area is the image to be projected. The area to be divided into multiple projection devices for overlapping projection.

For example, according to the established mapping relationship, the fourth region corresponding to S1, S2, S3, S4, S5, and S6 is respectively determined from the image to be projected.

Step 2: Based on the number of projection devices, the image parameter values corresponding to the respective pixels in the fourth region corresponding to each third region are equally divided.

Here, when the image parameter values corresponding to the respective pixels in the fourth region are equally divided, the pixel values of the fourth region may be equally divided according to the number of projection devices. For example, for S5, since the number of projection devices of the projection S5 is 3, after acquiring the fourth region corresponding to S5, the pixel values of the fourth region are processed into three equal parts, which is equivalent to three projection devices respectively projecting S5. 1/3 of the pixel value of each pixel of the corresponding fourth region, and further, the pixel value of each pixel obtained by the three projection devices co-projecting S5 is equal to each pixel in the fourth region in the image to be projected. The pixel value of the point.

S1004: Divide the processed image to be projected to obtain a first region corresponding to each of the at least two projection devices.

Here, after the control device performs the above processing on the image to be projected based on the overlap regions S1, S2, S3, S4, S5, and S6, the image to be projected is divided to obtain a first region corresponding to each projection device, and then combined with the second region. The sub-images to be projected corresponding to the projection devices are controlled, and then the sub-images to be projected corresponding to the projections of the projection devices are controlled, and the overlapping regions are not found in the projection regions obtained by the multi-projection device cooperative projection by the method, and related art In comparison with the scheme of manually adjusting the overlapping area by hand, in the embodiment, the efficiency of the cooperative projection of the multi-projection device is improved by the software control method, and the accuracy of the cooperative projection of the multi-projection device is ensured.

When an overlapping area appears in an image projected by a multi-projection device, the projected image may be first divided, and then the divided image may be processed to finally achieve the technical effect of no overlapping projection. Therefore, in this embodiment, referring to FIG. 11, S801 may further include:

S1101: dividing the image to be projected according to a relative positional relationship between the at least two projection areas and the target projection area, and obtaining a fifth area corresponding to each of the at least two projection devices;

Here, the control device first determines the regions C0, C1, C2, and C3 that overlap each other between the four projection regions and the target projection region P, and then divides the image to be projected according to C0, C1, C2, and C3 to obtain four projections. The fifth area corresponding to each device, the fifth area is a divided image corresponding to each projection device, that is, the first divided image corresponding to D0, the second divided image corresponding to D1, the third divided image corresponding to D2, and the fourth corresponding to D3 Divide the image.

S1102: determining, as each sixth region, an area in which at least two projection areas in the target projection area overlap each other;

Here, based on the regions in which the four projection regions D0', D1', D2', and D3' overlap each other, a plurality of sixth regions can be identified, which are: S1, S2, S3, S4, S5, and S6.

S1103: Obtain a number of projection devices corresponding to each sixth region;

Here, the control device acquires an area where S1 is a common projection of D0 and D2, and the number of projection devices corresponding to S1 is 2; S2 is an area jointly projected by D0 and D1, and the number of projection devices corresponding to S2 is 2; S3 is D1 and For the area jointly projected by D3, the number of projection devices corresponding to S3 is 2; S4 is the area jointly projected by D2 and D3, and the number of projection devices corresponding to S4 is 2; S5 is the area jointly projected by D1, D2 and D3, then S5 The number of corresponding projection devices is 3; S6 is the area where D0, D2, and D3 are jointly projected, and the number of projection devices corresponding to S6 is 3.

S1104: Processing, according to the number of projection devices, a fifth region corresponding to each of the at least two projection devices, to obtain a first region corresponding to each of the at least two projection devices.

Here, first, the control device establishes a mapping relationship between each projection area in the target projection area and the corresponding fifth area, for example, respectively establishing D0' and C0, D1' and C1, D2' and C2, and D3' The mapping relationship between C3; secondly, according to the established mapping relationship, the regions corresponding to S1, S2, S5, and S6 are determined from C0, and the regions corresponding to S2, S3, and S6 are determined from C1, and determined from C2. For the areas corresponding to S1, S4, and S5, the areas corresponding to S3, S4, S5, and S6 are determined from C3; then, according to the number of projection devices in S1, S2, S3, S4, S5, and S6, C0 and C1 are used. And pixel values of pixel points in the regions corresponding to S1, S2, S3, S4, S5, and S6 in C2 and C3 are equally processed to obtain a first region corresponding to each projection device; further, for each projection device According to the first region and the second region, the corresponding sub-images to be projected can be obtained. Finally, by controlling the projection images to be projected by the respective projection devices, the multi-projection device can be cooperatively projected, and the projection effect without overlapping projections can be achieved. .

It should be noted that in the actual projection, when manually projecting the multi-projection device for projection, it is also necessary to manually adjust the overlapping area between the images projected by each projector, and the manual adjustment workload is relatively heavy, and is more complicated in the projection device. For a long time, rapid adjustment cannot be achieved, and this method of manually adjusting the positions of multiple projectors can only be roughly adjusted, and the overlapping portions of the projection areas cannot be accurately shifted completely, so that the cooperative projection cannot be avoided. Overlapping areas that appear, resulting in poor projection.

However, in the embodiment of the present disclosure, after the projection devices are turned on, first, the control device controls the multi-projection device to perform initial projection to obtain each projection region; then, when an overlapping region occurs between the projection regions, the control device can quickly Processing the projected image to obtain the sub-image to be projected corresponding to each projection device; finally, the control device controls the projection image to be projected corresponding to each projection device, thereby avoiding the overlapping problem of the multi-projection device collaborative projection, thereby improving the Multi-projection device collaborative projection projection effect and projection accuracy.

Embodiment 2:

Based on the foregoing embodiment, the present embodiment performs cooperative projection with four projection devices. In detail, in S42, according to the relative positional relationship between at least two projection regions and the target projection region, at least two projection devices are respectively determined from the image to be projected. The process of projecting a sub-image.

After the control device controls the initial projection of D0 and D1, D2, and D3, and determines the target projection area, the coordinate value of any pixel in the target projection area, the number of projectors that project the pixel, and the corresponding projection coordinates are obtained. value. Furthermore, any pixel in the target projection area can be represented by the following array format: (X, Y, N, X0, Y0, X1, Y1, X2, Y2, X3, Y3), where X, Y are the target projections. The coordinate value of any pixel in the region, N is that the pixel is projected by N projections together. When N is 1, the pixel is projected by one projector. When N is 2, the pixel is shared by two projectors. Projection, when N is 3, the pixel is projected by 3 projectors together, and when N is 4, the pixel is projected by 4 projectors. (X0, Y0) is the projected coordinate value of D0. If the pixel is projected by D0, then (X0, Y0) is the specific coordinate value of the D0 projection. If the point is not projected by D0, the X0 of the pixel is set. =-1, Y0=-1; (X1, Y1) is the projected coordinate value of D1. If the pixel is projected by D1, then (X1, Y1) is the specific coordinate value of D1 projection, if the point is not projected by D1 , set X1=-1, Y1=-1 of the pixel; (X2, Y2) is the projection coordinate value of D2. If the pixel is projected by D2, then (X2, Y2) is the specific coordinate of the D2 projection. Value, if the pixel is not projected by D2, set X2=-1, Y2=-1 of the pixel; (X3, Y3) is the projection coordinate value of D3, if the pixel is projected by D3, then ( X3, Y3) is the specific coordinate value of the D3 projection. If the pixel is not projected by D3, X3=-1 and Y3=-1 of the pixel are set.

When the target projection area resolution is 1280×800 and the resolution of each projector device is 800×600, the collaborative projection with four projection devices is illustrated:

The pixel point (0, 0) in the target projection area is projected by the projector D2, and the coordinate value corresponding to D2 is (0, 50), and the corresponding array of the pixel point is (0, 0, 1, -1). , -1, -1, -1, 0, 50, -1, -1).

The pixel point (1280, 0) in the target projection area is projected by the projector D3, and the coordinate value corresponding to D2 is (800, 0), and the corresponding array of the pixel point is (1280, 0, 1, -1). , -1, -1, -1, -1, -1, 800, 0).

The pixel point (0,800) in the target projection area is projected by the projector D0, and the coordinate value corresponding to D0 is (60,600), and the corresponding array of the pixel point is (0,800,1,60,600,-1,-1,- 1,-1,-1,-1).

The pixel points (1280, 800) in the target projection area are projected by the projector D1, and the coordinate value corresponding to D1 is (800, 500), and the corresponding array of the pixel points is (1280, 800, 1, -1, -1, 800, 500). , -1, -1, -1, -1).

The pixel points (320, 400) in the target projection area are projected by the projectors D0 and D2. The coordinate value corresponding to D0 is (410, 0), and the coordinate value corresponding to D2 is (380, 290), then the corresponding array of the pixel points is (320, 400, 2, 410, 0, -1, -1, 380, 290, -1, -1).

The pixel points (640, 400) in the target projection area are projected by the projectors D0, D1, D2 and D3, and the coordinate values corresponding to D0 are (700, 50), and the coordinate values corresponding to D1 are (50, 50), corresponding to D2. The coordinate value is (760, 580), and the coordinate value corresponding to D3 is (50, 560). The corresponding array of the pixel is (640, 400, 4, 700, 50, 50, 50, 760, 580, 50, 560).

The control device reads the image to be projected cached by the display system, and the image to be projected can be represented by the coordinate value of each pixel and its corresponding color value, wherein the color value is represented by three primary colors (RGB), and further, the coordinates of each pixel point The value can be expressed as (X, Y, R, G, B), the coordinate value (X, Y) of each pixel in the image to be projected, and the coordinate value (X, Y) of each pixel in the target projection area. One-to-one correspondence, in turn, each pixel point on the image to be projected is divided into each projection device, and all the pixels in the sub-image to be projected corresponding to each projection device are obtained. Here, the following array format may be used. :

(X, Y, N, X0, Y0, R/N, G/N, B/N, X1, Y1, R/N, G/N, B/N, X2, Y2, R/N, G/N , B/N, X3, Y3, R/N, G/N, B/N,).

Regarding D0 (X0, Y0, R/N, G/N, B/N), if X0=-1, Y0=-1, then the pixel is not projected by D0, if X0>-1, Y0>-1 , then the pixel value of the coordinates (X0, Y0) in D0 needs to be projected (R/N, G/N, B/N), the projection device D0, initializes the display array [X0, Y0, 0, 0 , 0], no comfort color for the pixel is (0,0,0), for each pixel of the target projection area to do the division of the above projection device, fill the pixel value into the initialization array, you can get The final array [X0, Y0, R, G, B], the coordinate value of the array and its corresponding color value is the pixel value to be projected by D0 to project the pixel.

Regarding D1 (X1, Y1, R/N, G/N, B/N), if X1=-1, Y1=-1, then the pixel is not projected by D1, if X0>-1, Y0>-1 Then, the pixel whose coordinates are (X1, Y1) in D1 needs to be displayed (R/N, G/N, B/N), the projection device D1, initializes the display array [X1, Y1, 0, 0, 0 ], the comfort color is not given to the pixel (0,0,0), and each pixel of the target projection area is divided by the above projection device, and the color value is filled into the initialization array to obtain the final array. [X1, Y1, R, G, B], the coordinate value of the array and its corresponding color value is the pixel value to be projected by D1 to project the pixel.

Regarding D2 (X2, Y2, R/N, G/N, B/N), if X2=-1, Y2=-1, then the pixel is not projected on D2, if X2>-1, Y2>- 1, then the pixel value of the (X2, Y2) pixel in D2 needs to be displayed (R/N, G/N, B/N), the projection device D2, initialize the display array [X2, Y2, 0, 0 , 0], no comfort color for the pixel is (0, 0, 0), for each pixel of the target projection area to do the division of the above projection device, fill the color value into the initialization array, you can get The final array [X2, Y2, R, G, B], the coordinate value of the array and its corresponding color value is the pixel value to be projected by D2 to project the pixel.

Regarding D3 (X3, Y3, R/N, G/N, B/N), if X3=-1, Y3=-1, then the pixel is not projected on D3, if X3>-1, Y3>- 1, then the D3 coordinates (X3, Y3) points need to display the color value (R / N, G / N, B / N), the projection device D3, initialize the display array [X3, Y3, 0, 0, 0], no comfort color for the pixel is (0,0,0), for each pixel of the target projection area to do the division of the above projection device, fill the color value into the initialization array, you can get the final The array [X3, Y3, R, G, B], the coordinate value of the array and its corresponding color value is the pixel value to be projected by D3 to project the pixel.

Finally, the control device controls the respective sub-images to be projected corresponding to the D0, D1, D2, and D3 projections.

In a practical application, the projection device in this embodiment may be a digital light processing (DLP) projector, or may be another projector. Here, taking the DLP projector as an example, the projector includes the following key parts: the light source, the light source of the DLP system is composed of three LED bulbs, respectively emitting red RED, green GREEN, blue BLUE color light, brightness of the LED The higher the brightness of the projected picture, the higher the digital micromirror device (DMD), which is the core display device in the DLP projection system. It is composed of many small mirrors that can be rotated. The small mirror is pixel-based. Arranged in a row, each small mirror corresponds to each pixel of the image, or each pixel of the image controls the deflection angle of a small mirror. When the RGB data of each pixel of the image is decomposed, the RGB lights of the control LED are respectively switched. When the R lamp is turned on, the small mirror is deflected according to the value of R. The larger the R value, the more light the mirror reflects, G, The B lamp is turned on by the same process. Through this process, the correct brightness of RGB is reflected out in one frame of image; the lens converges the light reflected by the small mirror, and then projects onto the screen according to the focal length, and realizes different through the lens group in the lens. Focal length, through the focal length can adjust the imaging clarity and size of the screen; in summary of the principle of the DLP projection system, the picture data on the DMD will change the mirror flip of the DMD to change the intensity of the RGB light, and realize the color and brightness of each pixel of the picture. Differently, by changing the brightness of the three LEDs of R, G, and B, the color balance of the picture can be generally controlled.

In this embodiment, since the DLP projector can realize the superimposition effect of the pixel value of 1:1, when the multi-projection device cooperatively projects, the pixel value of the image to be projected corresponding to the overlap region can be based on the region. The number of projection devices is equally divided to control the color balance of the images that are co-projected.

Embodiment 3:

Based on the foregoing embodiments, the present embodiment performs cooperative projection examples by four projection devices, and details the process of determining the projection regions corresponding to the respective projection devices in S41 and determining the target projection regions.

Here, in order to simplify the image recognition algorithm, each projection device may perform initial projection using rectangular images of different colors. For example, for 4 projection devices, D0 represents a first projection device, and its projection color is a red rectangular region; D1 represents a second A projection device whose projection color is a green rectangular region; D2 represents a third projection device whose projection color is a yellow rectangular region; and D3 represents a fourth projection device whose projection color is a blue rectangular region. After the initial projection of the four projection devices, the control device controls the initial projection image acquired by the camera as shown in FIG. 5. There are 10 colors in the figure, including red, green, yellow, blue, and six mixed colors (not shown in Figure 5).

First, in conjunction with FIG. 5 and FIG. 6 (the areas corresponding to the six mixed colors in FIG. 5 are respectively S1, S2, S3, S4, S5, and S6 in FIG. 6), the projections corresponding to the four projection devices are determined for the control device. The process of the area is described.

The projection area corresponding to D0 is determined, and it is determined whether the S1-S6 area is adjacent to the red area, and the adjacent area is taken to form a projection area corresponding to D0, as in the frame of D0' in FIG.

Determining the projection area corresponding to D1, determining whether the S1-S6 area is adjacent to the green area, and taking the adjacent area to form a projection area corresponding to D1, as in the D1'-frame portion of FIG.

Determining the projection area corresponding to D2, determining whether the S1-S6 area is adjacent to the yellow area, and taking the adjacent area to form a projection area corresponding to D2, as shown in the D2'-frame portion in FIG.

The projection area corresponding to D3 is determined, and it is determined whether the S1-S6 area is adjacent to the blue area, and the adjacent area is taken to form a projection area corresponding to D3, as in the D3' in-frame portion in FIG.

Next, the target projection area is determined based on the projection areas D0', D1', D2', and D3' corresponding to the four projection devices D0, D1, D2, and D3.

As shown in FIG. 7, the control device performs image recognition on the projected edge of the initial projected image, and recognizes all horizontal lines and vertical lines of different colors, each of which has two horizontal lines and two vertical lines.

Confirmation of the upper boundary of the target projection area: the two horizontal lines of red in the D0' area take the higher one. The two horizontal lines of green in the D1' area take the higher one. The two lines are compared, and the lower one is taken as the upper boundary of the target projection area for extension.

Confirmation of the lower boundary of the target projection area: two horizontal lines of yellow color in the D2' area, taking the lower one. The two horizontal lines of the color blue in the D3' area take the lower one. The two lines are compared, and the higher one is taken as the lower boundary of the target projection area for extension.

Confirmation of the left boundary of the target projection area: two vertical lines of red color in the D0' area, taking the left one. The two vertical lines of the yellow color in the D2' area are taken from the left one. The two lines are compared, and the right one is taken as the left boundary of the target projection area for extension.

Confirmation of the right border of the target projection area: Two vertical lines of green color in the D1' area, taking the right one. The two vertical lines of the color blue in the D3' area are taken by the right one. The two lines are compared, and the left one is taken as the right boundary of the target projection area for extension.

Finally, the rectangular area composed of the four extension lines is the target projection area, as indicated by P in Fig. 7 .

Further, after the projection area corresponding to each projection device is determined in S41, and the target projection area is determined, the cooperative projection of the four projection devices is taken as an example, and S42 is described. Meanwhile, in the embodiment, each projection area is used. When there is an overlapping area, the image to be processed is divided first, and then the divided image is processed, and finally the non-overlapping projection is realized as an example.

First, the control device divides the image to be projected according to the relative positional relationship between the four projection regions and the target projection region, and obtains a fifth region corresponding to each of the four projection devices.

Next, the control device establishes a mapping relationship between each of the projection areas in the target projection area and the corresponding fifth area; and determines an image to be projected corresponding to each overlapping part from each of the fifth areas according to the established mapping relationship; The number of projection devices in the overlapping area is processed, and the pixel values of the corresponding image to be projected are processed to obtain sub-images to be projected corresponding to the respective projection devices.

Referring to FIG. 9, the sub-images to be projected corresponding to each projection device are described:

The sub-image to be projected corresponding to D0 includes the following part:

K0: the projection is black;

S1: overlapping with D2, after acquiring the image to be projected corresponding to S1, halving the pixel value of the image to be projected corresponding to S1, and obtaining the image to be projected corresponding to the processed S1;

S2: overlapping with D1, after acquiring the image to be projected corresponding to S2, halving the pixel value of the image to be projected corresponding to S2, and obtaining the image to be projected corresponding to the processed S2;

S5: overlapping with D2 and D3, after acquiring the image to be projected corresponding to S5, reducing the pixel value of the image to be projected corresponding to S5 to 1/3, and obtaining the image to be projected corresponding to the processed S5;

S6: overlapping with D1 and D3, after acquiring the image to be projected corresponding to S6, reducing the pixel value of the image to be projected corresponding to S6 to 1/3, and obtaining the image to be projected corresponding to the processed S6;

The pixel values of the image to be projected corresponding to other parts are unchanged.

The sub-image to be projected corresponding to D1 includes the following parts:

K1: Projection is black;

S2: overlapping with D0, after acquiring the image to be projected corresponding to S2, halving the pixel value of the image to be projected corresponding to S2, and obtaining the image to be projected corresponding to S2 after processing;

S3: overlapping with D3, after acquiring the image to be projected corresponding to S3, halving the pixel value of the image to be projected corresponding to S3, and obtaining the image to be projected corresponding to S3 after processing;

S6: overlapping with D0 and D3, after acquiring the image to be projected corresponding to S6, reducing the pixel value of the image to be projected corresponding to S6 to 1/3, and obtaining the image to be projected corresponding to the processed S6;

The sub-image to be projected corresponding to D2 includes the following parts:

K2: Projection is black;

S1: overlapping with D0, after acquiring the image to be projected corresponding to S1, halving the pixel value of the image to be projected corresponding to S1, and obtaining the image to be projected corresponding to S1 after processing;

S4: overlapping with D3, after acquiring the image to be projected corresponding to S4, halving the pixel value of the image to be projected corresponding to S4, and obtaining the image to be projected corresponding to the processed S4;

S5: overlapping with D0 and D3, after acquiring the image to be projected corresponding to S5, reducing the pixel value of the image to be projected corresponding to S5 to 1/3, and obtaining the image to be projected corresponding to the processed S5;

The sub-image to be projected corresponding to D3 includes the following parts:

K3: Projection is black;

S3: overlapping with D1, after acquiring the image to be projected corresponding to S3, halving the pixel value of the image to be projected corresponding to S3, and obtaining the image to be projected corresponding to the processed S3;

S4: overlapping with D2, after acquiring the image to be projected corresponding to S4, halving the pixel value of the image to be projected corresponding to S4, and obtaining the image to be projected corresponding to the processed S4;

S5: overlapping with D2 and D0, after acquiring the image to be projected corresponding to S5, reducing the pixel value of the image to be projected corresponding to S5 to 1/3, and obtaining the image to be projected corresponding to the processed S5;

S6: overlapping with D1 and D0, after acquiring the image to be projected corresponding to S6, reducing the pixel value of the image to be projected corresponding to S6 to 1/3, and obtaining the image to be projected corresponding to the processed S6;

Finally, the control device controls each of the projection devices to project respective corresponding images to be projected.

Embodiment 4:

Based on the same inventive concept, in the present embodiment, a projection apparatus is provided, which is disposed on a control device and configured to control a projection process of multi-projection device cooperative projection.

Here, referring to FIG. 12, the apparatus 100 includes: an acquisition module 101 configured to acquire an initial projection image formed by initial projection of at least two projection devices by an image acquisition unit; and a first processing module 102 configured to project an initial image from the initial projection image Determining at least two projection areas corresponding to at least two projection devices, and determining a maximum inscribed rectangular area formed by the at least two projection areas as a target projection area; and the second processing module 103 is configured to according to at least two projection areas And a relative positional relationship with the target projection area, determining a sub-image to be projected corresponding to each of the at least two projection devices from the image to be projected; and the control module 104 is configured to respectively control at least two projection devices to project the corresponding sub-images to be projected.

In this embodiment, the second processing module 103 is further configured to divide the image to be projected according to the relative positional relationship between the at least two projection areas and the target projection area, to obtain a first area corresponding to each of the at least two projection devices; Determining a non-overlapping region between the at least two projection regions and the target projection region as a second region corresponding to each of the at least two projection devices, wherein the image parameters of the respective pixels in the second region are the same; for each projection device, according to the first The region and the second region obtain respective corresponding sub-images to be projected.

In this embodiment, the second processing module 103 is further configured to determine, as the third region, an area in which at least two of the target projection areas overlap each other; and acquire a number of projection devices corresponding to each third area; The first image to be projected is processed according to the number of the projection devices; and the processed image to be projected is divided according to the relative positional relationship between the at least two projection regions and the target projection region, and the first corresponding to each of the at least two projection devices is obtained. region.

In this embodiment, the second processing module 103 is further configured to determine, according to the mapping relationship between the image to be projected and the target projection area, the fourth region corresponding to each third region from the image to be projected; And dividing the image parameter values corresponding to the respective pixels in the fourth region corresponding to each of the third regions.

In this embodiment, the second processing module 103 is further configured to divide the image to be projected according to the relative positional relationship between the at least two projection areas and the target projection area, and obtain a fifth area corresponding to each of the at least two projection devices; An area in which at least two projection areas overlap each other in the target projection area is determined as each sixth area; a number of projection devices corresponding to each sixth area is acquired; and a fifth corresponding to each of the at least two projection devices is based on the number of projection devices The area is processed to obtain a first area corresponding to each of the at least two projection devices.

In an actual application, the obtaining module 101, the first processing module 102, the second processing module 103, and the control module 104 may be implemented by a processor in a projection device.

It should be noted here that the description of the above device embodiment is similar to the description of the above method embodiment, and has similar advantageous effects as the method embodiment, and therefore will not be described again. For the technical details that are not disclosed in the embodiments of the present disclosure, please refer to the description of the method embodiments of the present disclosure, and the details are not described herein.

Those skilled in the art will appreciate that embodiments of the present disclosure can be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of a hardware embodiment, a software embodiment, or a combination of software and hardware aspects. Moreover, the present disclosure may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.

The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present disclosure. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Based on this, an embodiment of the present disclosure further provides a storage medium, in particular a computer readable storage medium, on which a computer program is stored, and when the computer program is executed by the processor, the steps of the method of the embodiment of the present disclosure are implemented.

The above description is only for the preferred embodiments of the present disclosure, and is not intended to limit the scope of the disclosure.

Industrial applicability

The solution provided by the embodiment of the present disclosure firstly acquires an initial projection image formed by initial projection of at least two projection devices; secondly, determines a projection area corresponding to each projection device and a target projection region from the initial projection image; a relative positional relationship between the projection area and the target projection area, determining a sub-image to be projected corresponding to each projection device from the image to be projected; finally, respectively controlling each projection device to project a corresponding sub-image to be projected, the process does not require manual operation. The cooperative projection of multi-projection equipment can be realized only by means of software control, thereby improving the intelligence degree of collaborative projection of multi-projection equipment and improving the projection efficiency of multi-projection equipment collaborative projection.

Claims

A projection method comprising:

Obtaining an initial projected image formed by initial projection of at least two projection devices;

Determining at least two projection regions corresponding to the at least two projection devices from the initial projection image, and determining a maximum inscribed rectangular region formed by the at least two projection regions as a target projection region;

Determining, according to a relative positional relationship between the at least two projection areas and the target projection area, a sub-image to be projected corresponding to each of the at least two projection devices from the image to be projected;

The at least two projection devices are respectively controlled to project the corresponding sub-images to be projected.
The method according to claim 1, wherein the determining, according to a relative positional relationship between the at least two projection areas and the target projection area, determining, from the image to be projected, each of the at least two projection devices to be projected Sub-images, including:

And dividing the image to be projected according to the relative positional relationship between the at least two projection areas and the target projection area, to obtain a first area corresponding to each of the at least two projection devices;

Determining, respectively, an area that does not overlap between the at least two projection areas and the target projection area as a second area corresponding to each of the at least two projection devices, and an image parameter value of each pixel in the second area the same;

Obtaining a sub-image to be projected corresponding to each of the at least two projection devices according to the first region and the second region.
The method according to claim 2, wherein the image to be projected is divided according to a relative positional relationship between the at least two projection areas and the target projection area, and each of the at least two projection devices is obtained. Corresponding first area, including:

Determining, between the at least two projection areas in the target projection area, areas that overlap each other as each of the third areas;

Obtaining a number of projection devices corresponding to the respective third regions;

Processing the image to be projected based on the number of the projection devices;

And dividing the processed image to be projected according to the relative positional relationship between the at least two projection areas and the target projection area, to obtain a first area corresponding to each of the at least two projection devices.
The method of claim 3, wherein the processing the image to be projected based on the number of the projection devices comprises:

Determining, according to a mapping relationship between the image to be projected and the target projection area, a fourth region corresponding to each of the third regions from the image to be projected;

The image parameter values corresponding to the respective pixel points in the fourth region corresponding to the respective third regions are equally divided based on the number of the projection devices.
The method according to claim 2, wherein the image to be projected is divided according to a relative positional relationship between the at least two projection areas and the target projection area, and each of the at least two projection devices is obtained. Corresponding first area, including:

And dividing the image to be projected according to a relative positional relationship between the at least two projection areas and the target projection area, and obtaining a fifth area corresponding to each of the at least two projection devices;

Determining, as the respective sixth region, an area in which the at least two projection areas in the target projection area overlap each other;

Obtaining a number of projection devices corresponding to the respective sixth regions;

And processing, according to the number of the projection devices, a fifth region corresponding to each of the at least two projection devices, to obtain a first region corresponding to each of the at least two projection devices.
A projection device comprising:

An acquiring module configured to acquire an initial projection image formed by initial projection of at least two projection devices by using an image acquisition unit;

a first processing module, configured to determine at least two projection regions corresponding to the at least two projection devices from the initial projection image, and determine a maximum inscribed rectangular region formed by the at least two projection regions as a target Projection area

a second processing module, configured to determine, according to a relative positional relationship between the at least two projection areas and the target projection area, a sub-image to be projected corresponding to each of the at least two projection devices from the image to be projected;

And a control module configured to respectively control the at least two projection devices to project the corresponding sub-images to be projected.
The apparatus according to claim 6, wherein the second processing module is further configured to divide the image to be projected according to a relative positional relationship between the at least two projection areas and the target projection area, to obtain a first region corresponding to each of the at least two projection devices; an area that does not overlap between the at least two projection regions and the target projection region, respectively, is determined as a second region corresponding to each of the at least two projection devices And the image parameter values of the respective pixels in the second area are the same; and the sub-images to be projected corresponding to the at least two projection devices are respectively obtained according to the first area and the second area.
The apparatus according to claim 7, wherein the second processing module is further configured to determine, as each third region, an area in which the at least two projection areas in the target projection area overlap each other; The number of projection devices corresponding to each of the third regions; processing the image to be projected based on the number of the projection devices; and processing the image according to the relative positional relationship between the at least two projection regions and the target projection region The image to be projected is divided to obtain a first region corresponding to each of the at least two projection devices.
The apparatus according to claim 8, wherein the second processing module is further configured to determine, according to a mapping relationship between the image to be projected and the target projection area, from the image to be projected a fourth region corresponding to each of the third regions; and based on the number of the projection devices, the image parameter values corresponding to the respective pixels in the fourth region corresponding to the respective third regions are equally divided.
The apparatus according to claim 7, wherein the second processing module is further configured to divide the image to be projected according to a relative positional relationship between the at least two projection areas and the target projection area, to obtain a fifth region corresponding to each of the at least two projection devices; an area in which the at least two projection regions in the target projection region overlap each other is determined as each sixth region; and the respective sixth regions are acquired The number of the projection devices; processing the fifth region corresponding to each of the at least two projection devices based on the number of the projection devices, to obtain a first region corresponding to each of the at least two projection devices.
A projection system comprising:

a camera configured to acquire an initial projection image formed by initial projection of at least two projection devices; and a control device configured to determine at least two projection regions corresponding to the at least two projection devices from the initial projection image, and Determining, as the target projection area, a maximum inscribed rectangular area formed by the at least two projection areas; determining the at least the image to be projected from the image to be projected according to a relative positional relationship between the at least two projection areas and the target projection area a sub-image to be projected corresponding to each of the two projection devices; respectively controlling the at least two projection devices to project the corresponding sub-images to be projected; the at least two projection devices are configured as initial projections; Corresponding to the sub-image to be projected.
A storage medium having stored thereon a computer program, the computer program being executed by a processor to perform the steps of the method of any one of claims 1 to 5.