CN116828159A

CN116828159A - Projection area adjusting method of transparent screen, projection equipment and storage medium

Info

Publication number: CN116828159A
Application number: CN202310284055.9A
Authority: CN
Inventors: 李志�; 金凌琳; 杨延彬
Original assignee: Shenzhen Dangzhi Technology Co ltd
Current assignee: Shenzhen Dangzhi Technology Co ltd
Priority date: 2023-03-13
Filing date: 2023-03-13
Publication date: 2023-09-29

Abstract

The application provides a projection area adjusting method, projection equipment and a computer storage medium of a transparent screen, wherein the method comprises the following steps: projecting a dynamic detection image to a transparent screen, wherein the dynamic detection image comprises characteristic patterns, and the characteristic patterns are subjected to quantity change in a preset direction according to a time sequence rule; collecting shooting images of the transparent screen, and identifying the change moment of the target quantity of the characteristic patterns according to the time sequence rule and each shooting image; the target quantity change time is the time when the pattern quantity of the characteristic pattern in the shot image starts to change or stops changing; determining a target frame according to the corresponding target characteristic pattern in the time sequence rule at the time of the change of the target quantity; adjusting a projection area according to the target frame; according to the embodiment of the application, the projection area is adjusted to realize automatic curtain entering of the transparent screen, and manual adjustment is not needed, so that the curtain entering of the transparent screen is more convenient and accurate.

Description

Projection area adjusting method of transparent screen, projection equipment and storage medium

Technical Field

The present application relates to the field of clothes drying, and in particular, to a method for adjusting a projection area of a transparent screen, a projection apparatus, and a storage medium (computer-readable storage medium).

Background

The HUD (universal for english: head Up Display, universal for chinese: head Up Display) system essentially projects information to be displayed onto a transparent medium in front of a driver, so that the driver can see an environmental scene and Display information projected onto the transparent medium simultaneously through the transparent medium.

With the development of projection technology, HUD systems are gradually applied to the field of common household and commercial projection, for example, a general projection screen is replaced by a transparent screen with a special microstructure, so that the effect of semi-transparent and semi-reflective is achieved, and accordingly, a scene at the rear side of the transparent screen and projection information projected onto the transparent screen are displayed, and a user can have experience of augmented reality. In most cases, it is often difficult for the projected image of the projection device to be completely located in the screen, especially for a transparent screen with a completely transparent frame, the camera cannot recognize the edge of the screen to achieve automatic screen entry, and it is often necessary to manually adjust the image to achieve screen entry.

Disclosure of Invention

The application provides a projection area adjusting method of a transparent screen, projection equipment and a computer storage medium, which are used for solving the problems that the current projection equipment is troublesome in screen entering operation of the transparent screen and can not accurately enter the screen.

In a first aspect, the present application provides a method for adjusting a projection area of a transparent screen, where the method includes:

projecting a dynamic detection image to a transparent screen, wherein the dynamic detection image comprises characteristic patterns, and the characteristic patterns are subjected to quantity change in a preset direction according to a time sequence rule;

collecting shooting images of the transparent screen, and identifying the change moment of the target quantity of the characteristic patterns according to the time sequence rule and each shooting image; the target quantity change time is the time when the pattern quantity of the characteristic pattern in the shot image starts to change or stops changing;

determining a target frame according to the corresponding target characteristic pattern in the time sequence rule at the time of the change of the target quantity;

and adjusting a projection area according to the target frame.

Optionally, the capturing a captured image of the transparent screen includes:

determining the change period of the dynamic detection image according to the time sequence rule of the display of the characteristic pattern in the dynamic detection image;

and sending a shooting instruction according to the change period, and collecting shooting images of the transparent screen.

Optionally, the timing rule includes any one of a first timing rule, a second timing rule, a third timing rule, and a fourth timing rule:

The first timing rule is: the characteristic patterns in the characteristic images projected firstly in the dynamic detection image are not displayed, and the characteristic patterns in the characteristic images projected later appear from one side edge to the middle row by row/column;

the second timing rule is: the characteristic patterns are not displayed in the characteristic images projected firstly in the dynamic detection image, and then the characteristic patterns in the projected characteristic images appear row by row/column from the middle to one side edge;

the third timing rule is: displaying all feature patterns in the feature images projected firstly in the dynamic detection image, and then enabling the feature patterns in the projected feature images to disappear line by line/column from the middle to one side edge;

the fourth timing rule is: and displaying all the characteristic patterns in the characteristic images projected firstly in the dynamic detection image, and then, enabling the characteristic patterns in the characteristic images projected secondly to disappear from one side edge to the middle line by line/column.

Optionally, the identifying the target number change moment of the feature pattern according to the timing rule and each of the captured images includes:

if the time sequence rule is the first time sequence rule or the fourth time sequence rule, identifying characteristic patterns on two adjacent pairs of shooting images to obtain target quantity change time when the quantity of the patterns starts to change;

And if the time sequence rule is the second time sequence rule or the third time sequence rule, identifying the characteristic patterns on the two adjacent pairs of shooting images to obtain the target number change moment when the number of the patterns stops changing.

Optionally, the determining the target frame according to the target feature pattern corresponding to the timing rule at the time of the change of the target number includes:

inquiring a preset mapping relation table, and acquiring a corresponding target feature pattern in the time sequence rule and a target pattern coordinate of the target feature pattern at the time of the change of the target quantity; the preset mapping relation table comprises characteristic patterns displayed at different moments of the dynamic detection image and association relations between pattern coordinates of the characteristic patterns;

and setting the object pattern coordinate at the most edge of the object pattern coordinates as an object frame in the shooting image.

Optionally, the projecting a dynamic detection image onto a transparent screen, where the dynamic detection image includes feature patterns, and each feature pattern changes in number in a preset direction according to a time sequence rule, and the method includes:

projecting a dynamic detection image to a transparent screen, wherein the dynamic detection image comprises a characteristic pattern;

The dynamic detection image changes the row or column number of the characteristic pattern according to a time sequence rule in a preset direction.

Optionally, the step of collecting the photographed images of the transparent screen and identifying the change time of the target number of the feature patterns according to the timing rule and each of the photographed images includes:

acquiring shooting images of the transparent screen within a preset shooting time after each time of changing the row or column number of the characteristic pattern according to the time sequence rule;

and determining the change moment of the target quantity of the characteristic patterns according to the shot images of which the quantity of the patterns of the characteristic patterns starts to change or stops to change.

Optionally, the step of determining the target frame according to the target feature pattern corresponding to the timing rule at the time of the change of the target number includes:

and obtaining a target characteristic pattern according to the characteristic pattern with changed rows or columns under the time sequence rule corresponding to the target quantity change moment, and determining a target frame according to the target characteristic pattern.

Optionally, the adjusting the projection area according to the target frame includes:

and setting the vertex pattern coordinates in the target frame as projection vertex coordinates of a video image to be projected so as to project the video image into a projection area formed by enclosing the target frame in the transparent screen.

Optionally, before the projecting the dynamic probe image onto the transparent screen, the method includes:

projecting a preset calibration image to a transparent screen, and shooting the transparent screen on which the preset calibration image is projected to obtain a shooting image;

establishing a homography matrix according to a first position of a calibration pattern in the preset calibration image and a second position of the calibration pattern in the shooting image;

and carrying out trapezoidal correction on the dynamic detection image to be projected according to the homography matrix so as to project the dynamic detection image subjected to trapezoidal correction to the transparent screen.

On the other hand, the embodiment of the application provides a projection area adjusting device of a transparent screen;

the projection area adjusting device of the transparent screen comprises:

the projection module is used for projecting dynamic detection images to the transparent screen, wherein the dynamic detection images comprise characteristic patterns, and the characteristic patterns are subjected to quantity change in a preset direction according to a time sequence rule;

the identification module is used for acquiring the shot images of the transparent screen and identifying the change moment of the target quantity of the characteristic patterns according to the time sequence rule and each shot image; the target quantity change time is the time when the pattern quantity of the characteristic pattern in the shot image starts to change or stops changing;

The determining module is used for determining a target frame according to the corresponding target characteristic pattern in the time sequence rule at the moment of the change of the target quantity;

and the adjusting module is used for adjusting the projection area according to the target frame.

On the other hand, the embodiment of the application also provides a projection device, wherein the projection device is internally provided with a processor and a memory, the memory stores a computer program corresponding to the entering of the transparent screen, the computer program can run on the processor, and the processor executes the entering program of the transparent screen to realize the steps in the projection area adjustment method of the transparent screen.

On the other hand, the embodiment of the application also provides a computer readable storage medium, wherein the computer readable storage medium stores a plurality of instructions, the instructions are suitable for being loaded by a processor, the computer readable storage medium stores a screen entering program of a transparent screen, and the screen entering program of the transparent screen is executed by the processor to realize the steps in the method for adjusting the projection area of the transparent screen.

From the above, the present application has the following advantages:

the application provides a projection area adjusting method, projection equipment and a computer storage medium of a transparent screen, wherein the method comprises the following steps: projecting a dynamic detection image to a transparent screen, wherein the dynamic detection image comprises characteristic patterns, and the characteristic patterns are subjected to quantity change in a preset direction according to a time sequence rule; collecting shooting images of the transparent screen, and identifying the change moment of the target quantity of the characteristic patterns according to the time sequence rule and each shooting image; the target quantity change time is the time when the pattern quantity of the characteristic pattern in the shot image starts to change or stops changing; determining a target frame according to the corresponding target characteristic pattern in the time sequence rule at the time of the change of the target quantity; adjusting a projection area according to the target frame; according to the embodiment of the application, the dynamic detection image is projected to the transparent screen, the shot images are controlled to be acquired according to the time sequence rule presented by the characteristic patterns in the dynamic detection image, the change moment of the target quantity of the characteristic patterns is identified according to the quantity change of the characteristic patterns in each shot image, and the target frames corresponding to the transparent screen are obtained to adjust the projection area so as to realize automatic screen entering, and manual adjustment is not needed, so that the transparent screen entering is more convenient and accurate.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view of a scene of a method for adjusting a projection area of a transparent screen according to an embodiment of the present application;

FIG. 2 is a flowchart illustrating an embodiment of a method for adjusting a projection area of a transparent screen according to an embodiment of the present application;

FIG. 3 is a schematic view of a scene determined at a moment of change in the number of objects in a method for adjusting a projection area of a transparent screen according to an embodiment of the present application;

FIG. 4 is a detailed flowchart of step 202 in the method for adjusting the projection area of a transparent screen according to an embodiment of the present application;

FIG. 5 is a schematic view of an exemplary scenario in which the change time of the target number is determined in the method for adjusting the projection area of the transparent screen according to the embodiment of the present application;

FIG. 6 is a flowchart illustrating an embodiment of a transparent screen frame determination in a method for adjusting a projection area of a transparent screen according to an embodiment of the present application;

FIG. 7 is a schematic flow chart diagram of an embodiment of trapezoidal correction in a method for adjusting a projection area of a transparent screen according to an embodiment of the present application;

FIG. 8 is a schematic view showing the structure of an embodiment of a projection area adjusting apparatus for a transparent screen according to an embodiment of the present application;

fig. 9 is a schematic structural view of an embodiment of a projection apparatus provided in an embodiment of the present application.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be encompassed by the present application.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present application, the term "exemplary" is used to mean "serving as an example, instance, or illustration. Any embodiment described as "exemplary" in this disclosure is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the application. In the following description, details are set forth for purposes of explanation. It will be apparent to one of ordinary skill in the art that the present application may be practiced without these specific details. In other instances, well-known structures and processes have not been described in detail so as not to obscure the description of the application with unnecessary detail. Thus, the present application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.

The embodiment of the application provides a method, equipment and a computer storage medium for adjusting a projection area of a transparent screen, and the method, the equipment and the computer storage medium are respectively described in detail below.

The projection area adjusting method of the transparent screen in the embodiment of the application is applied to the projection area adjusting device of the transparent screen, the projection area adjusting device of the transparent screen is arranged in projection equipment, one or more processors, a memory and one or more application programs are arranged in the projection equipment, wherein the one or more application programs are stored in the memory and are configured to be executed by the processor to realize the projection area adjusting method of the transparent screen; the projection device may be a terminal, for example, a mobile phone or a tablet computer, and the projection device may also be a server, or a service cluster formed by a plurality of servers.

As shown in fig. 1, fig. 1 is a schematic view of a scene of a method for adjusting a projection area of a transparent screen according to an embodiment of the present application, where a scene of entering the transparent screen in the embodiment of the present application includes a projection device 100 (a projection area adjusting device of the transparent screen is integrated in the projection device 100), and a computer storage medium corresponding to the entering of the transparent screen is run in the projection device 100, so as to execute a step of entering the transparent screen.

It should be understood that the projection device in the scene of the transparent screen shown in fig. 1, or the apparatus included in the projection device, does not limit the embodiments of the present application, that is, the number of devices and the type of devices included in the scene of the transparent screen, or the type of the apparatus included in each device, do not affect the overall implementation of the technical solution in the embodiments of the present application, and may be considered as equivalent replacement or derivative of the technical solution claimed in the embodiments of the present application.

The projection device 100 in the embodiment of the present application is mainly used for: projecting a dynamic detection image to a transparent screen, wherein the dynamic detection image comprises characteristic patterns, and the characteristic patterns are subjected to quantity change in a preset direction according to a time sequence rule; collecting shooting images of the transparent screen, and identifying the change moment of the target quantity of the characteristic patterns according to the time sequence rule and each shooting image; the target quantity change time is the time when the pattern quantity of the characteristic pattern in the shot image starts to change or stops changing; determining a target frame according to the corresponding target characteristic pattern in the time sequence rule at the time of the change of the target quantity; and adjusting a projection area according to the target frame.

The projection device 100 in the embodiment of the present application may be a stand-alone projection device, or may be a projection device grid or a projection device cluster formed by projection devices, for example, the projection device 100 described in the embodiment of the present application includes, but is not limited to, a computer, a grid host, a single grid projection device, a plurality of grid projection device sets, or a cloud projection device formed by a plurality of projection devices. Wherein the Cloud projection device is composed of a large number of computers or grid projection devices based on Cloud Computing (Cloud Computing).

It will be appreciated by those skilled in the art that the application environment shown in fig. 1 is merely an application scenario of the present application, and is not limited to the application scenario of the present application, and other application environments may further include more or fewer projection devices than those shown in fig. 1, or a grid connection relationship of the projection devices, for example, only 1 projection device is shown in fig. 1, and it will be appreciated that the scene of entering the screen of the transparent screen may further include one or more other projection devices, which is not limited herein in particular; a memory may also be included in the projection device 100.

In addition, the projection device 100 in the screen-in scene of the transparent screen of the present application may be provided with a display device, or the projection device 100 is not provided with a display device connected to the external display device 200 in a communication manner, and the display device 200 is used for outputting the result of the execution of the projection area adjustment method of the transparent screen in the projection device. The projection device 100 may access a background database 300 (the background database may be in a local memory of the projection device, and the background database may also be disposed in the cloud), where information related to the entering of the transparent screen is stored in the background database 300.

It should be noted that, the schematic view of the scene of the method for adjusting the projection area of the transparent screen shown in fig. 1 is only an example, and the scene of entering the screen of the transparent screen described in the embodiment of the present application is for more clearly describing the technical solution of the embodiment of the present application, and does not constitute a limitation of the technical solution provided by the embodiment of the present application.

Based on the above-mentioned scene of entering the curtain of transparent screen, an embodiment of a method for adjusting the projection area of the transparent screen is provided.

Referring to fig. 2, fig. 2 is a flowchart illustrating an embodiment of a method for adjusting a projection area of a transparent screen according to an embodiment of the present application, where the method for adjusting a projection area of a transparent screen includes steps 201 to 204:

201, projecting a dynamic detection image to a transparent screen, wherein the dynamic detection image comprises characteristic patterns, and the characteristic patterns are subjected to quantity change in a preset direction according to a time sequence rule;

specifically, step 201 may include: the dynamic detection image changes the row or column number of the characteristic pattern according to a time sequence rule in a preset direction.

The method for adjusting the projection area of the transparent screen is applied to projection equipment, at least one dynamic detection image is prestored in the projection equipment, and the dynamic detection image comprises a large number of characteristic patterns which disappear or appear at intervals in a preset direction according to time sequence;

The time sequence rule refers to a time sequence rule of change of the feature pattern, for example, the time sequence rule is that the feature pattern is not displayed in the dynamic detection image firstly, and then the feature pattern appears from one side edge to the middle line by line/column;

the preset direction is a direction perpendicular to or parallel to a screen frame of the transparent screen, for example, if the transparent screen is rectangular, the preset direction is a length direction and a width direction of the rectangle;

the feature pattern in the dynamic detection image can be an array point set, an array-arranged polygon pattern, an interval-arranged bar pattern and the like, the change of the feature pattern in the dynamic detection image has a change period, and the feature pattern in the dynamic detection image occupies or almost occupies the dynamic detection image at a certain time point or at least is arranged in the peripheral area in the detection image.

The projection equipment projects dynamic detection images to the transparent screen so that a shooting module on the projection equipment or mobile equipment matched with the projection equipment can record dynamic change feature patterns on the transparent screen in real time to obtain shooting images, and the projection equipment determines the approximate frame of the transparent screen based on the real-time change condition of the feature patterns on the transparent screen and the change condition of the feature patterns corresponding to the dynamic detection images on the projection equipment, so that the image entering is realized, and specifically:

202, collecting shot images of the transparent screen, and identifying the change moment of the target quantity of the characteristic patterns according to the time sequence rule and each shot image; the target quantity change time is the time when the pattern quantity of the characteristic pattern in the shot image starts to change or stops changing;

after the projection device projects the dynamic detection image to the transparent screen, the projection device sends an acquisition instruction according to the change period of the characteristic pattern in the dynamic detection image and acquires the shooting image of the transparent screen, specifically, the projection device acquires the shooting image of the transparent screen in the embodiment of the application, and the method comprises the following steps:

1. determining the change period of the dynamic detection image according to the time sequence rule of the display of the characteristic pattern in the dynamic detection image;

2. and sending a shooting instruction according to the change period, and collecting shooting images of the transparent screen.

The period of the dynamic detection image may be a period in which the dynamic detection image changes the number of rows or columns of the feature pattern each time according to the timing rule. For example, the number of lines of the dynamic probe image is changed every 0.5 seconds, and the period of change is 0.5 seconds, but it should be noted that the time of each period of change may be the same or different.

Further, in some embodiments, the shot image of the transparent screen is acquired within a preset shooting time after each line number or column number of the feature pattern is changed according to the timing rule. For example, within 0.5 seconds after the dynamic detection image changes the number of rows or columns of the feature pattern, a shooting instruction is sent to the shooting module on the projection device, so as to instruct the shooting module to shoot the transparent screen on which the dynamic detection image is projected, and a shooting image is obtained. And then determining the target quantity change moment of the characteristic pattern according to the shot image of which the pattern quantity of the characteristic pattern starts to change or stops to change.

The method comprises the steps that a projection device obtains a time sequence rule for displaying characteristic patterns in a dynamic detection image, the number of the characteristic patterns corresponding to the time sequence rule is obtained, and the projection device obtains a change period of the dynamic detection image according to the number change condition of the number of the patterns; for example, the dynamic detection image is a matrix of 400 feature patterns formed by 20×20, the pattern number change rule of the feature patterns is that the matrix of 400 feature patterns is displayed at first, and one line disappears from above to below the image every second at first, namely 20 feature patterns are reduced; after the ten lines of feature patterns are disappeared, a matrix of 400 feature patterns is re-projected and disappears in one column every second from the right of the image left Fang Zhi; after the ten columns of feature patterns disappear, the matrix of 400 feature patterns is projected again and the dynamic change process of the dynamic detection image in the other direction is started. And respectively performing a similar dynamic change process on the four directions of the dynamic detection image. It should be noted that the disappearance period of the rows/columns may be 0.5 seconds, 0.3 seconds, etc. and the matrix of the feature patterns may be a rectangular matrix adapted to the shape of the normal projection screen, such as a matrix of 800 feature patterns of 40×20.

The projection equipment sends shooting instructions according to the display time of different pattern numbers in the change period, and acquires shooting images of the transparent screen; for example, the time sequence rule of the display of the characteristic patterns in the dynamic detection image is that all 400 characteristic patterns are displayed in the dynamic detection image, the characteristic patterns are arranged according to an array, and the characteristic patterns disappear from the middle to one side edge line by line/column for 1 second; the side edge of the projection device disappears every 1 second of a row/column, a projection module of the projection device sends a starting signal, then a shooting module of the projection device starts to identify the number of characteristic patterns in a shooting image from the time of receiving the starting signal, the projection device sends shooting instructions every 1 second, the shooting image of the transparent screen is acquired, and the projection device acquires at least 20 shooting images.

In this embodiment, the projection device controls the dynamic detection image in real time during the shooting process, so that the feature patterns arranged in the array in the dynamic detection image sequentially disappear or appear from the outside to the inside or from the inside to the outside on one side of the image according to the time sequence rule. Simultaneously, continuously shooting a transparent screen through a shooting module in the projection equipment or a mobile terminal matched with the projection equipment, identifying each characteristic pattern in each shooting image in real time by the projection equipment to obtain the number of patterns in the shooting patterns, comparing the number of patterns corresponding to two adjacent shooting images by the projection equipment, and identifying the change moment of the target number of the characteristic patterns according to a time sequence rule and the number of patterns corresponding to each shooting image by the projection equipment; the target quantity change time is the time when the pattern quantity of the characteristic pattern in the shot image starts to change or stops changing; for example, if the timing rule indicates that all feature patterns are displayed in a feature image projected first in the dynamic probe image, and then the feature patterns in the projected feature image disappear from one side edge to the middle line by line/column, the target number change moment is the moment when the number of patterns of the feature patterns in the photographed image starts to change, and referring to fig. 3, fig. 3 is a schematic view of a scene determined by the target number change moment in the method for adjusting the projection area of the transparent screen according to the embodiment of the present application.

And 203, determining a target frame according to the corresponding target characteristic pattern in the time sequence rule at the time of the change of the target quantity.

That is, the projection device determines a moment about the start or stop of the change of the number of feature patterns in the real-time photographed image, determines which row/column of feature patterns corresponding to the moment is changed in the time sequence rule according to the moment, coordinates of the row/column of feature patterns can be used as a frame position of the transparent screen, the projection device determines a target frame according to the corresponding target feature patterns in the time sequence rule under the change moment of the target number, the time sequence of the photographed image has a corresponding relation with the change time sequence of the dynamic detection image, when the feature patterns of one row/column in the dynamic detection image appear or disappear, and when the number of feature patterns in the photographed image also increases, decreases or does not change any more in the corresponding change period time, the feature patterns of the row/column are indicated to be positioned in the transparent screen and near the edge of the side, so that the corresponding coordinate connection line of the row/column of feature patterns is used as the approximate frame of the transparent screen on the side, and the side is marked as the target coordinate corresponding to the target frame.

In some embodiments, step 203 comprises: and obtaining a target characteristic pattern according to the characteristic pattern with changed rows or columns under the time sequence rule corresponding to the target quantity change moment, and determining a target frame according to the target characteristic pattern. Specifically, when it is recognized that the photographed image starts to change in the number of feature patterns, the photographing time corresponding to the photographed image is confirmed, then it is determined that the photographing time is within a preset photographing time after the time at which the number of lines or columns of the feature pattern is changed, and then the feature pattern of the line or column changed in the change time of the feature pattern is taken as the target feature pattern.

204, adjusting the projection area according to the target frame.

The projection device adjusts the projection area according to the target frame, namely, the projection device sets the vertex pattern coordinates in the target frame as the projection vertex coordinates of the video image to be projected so as to project the video image into the projection area formed by surrounding the target frame in the transparent screen.

After the projection equipment obtains four side row target coordinates, four target vertexes are determined, and the four vertexes of the original projection area are reduced to corresponding target vertex positions, so that the adjustment of the projection area is completed. The video/image information is then projected based on the adjusted projection area, where the projected image will be within the transparent screen.

According to the embodiment of the application, the dynamic detection image is projected to the transparent screen, the shooting images are controlled to be collected according to the time sequence rule presented by the characteristic patterns in the dynamic detection image, the target quantity change moment of the characteristic patterns is identified according to the quantity change of the characteristic patterns in each shooting image, and the target frame corresponding to the transparent screen is obtained so as to realize automatic screen entering, and manual adjustment is not needed, so that the transparent screen entering is more convenient and accurate.

Fig. 4 is a detailed flowchart of step 202 in the method for adjusting the projection area of the transparent screen according to the embodiment of the application.

The timing rule in the projection area adjustment method of this embodiment includes any one of a first timing rule, a second timing rule, a third timing rule, and a fourth timing rule:

Further, in the method for adjusting the projection area of the transparent screen, the step of identifying the change time of the target number of the feature patterns according to the timing rule and each of the captured images includes steps 301 to 302:

301, if the timing rule is the first timing rule or the fourth timing rule, identifying feature patterns on two adjacent pairs of the photographed images, and obtaining a target number change moment when the number of patterns starts to change;

the first timing rule is that the feature pattern is not displayed in the dynamic detection image at first, but the feature pattern appears from one side edge of the image to the middle line/column by line, the feature pattern is identified in real time through the shooting image, and when the feature pattern of the nth line/column in the dynamic detection image appears, and the number of the feature patterns in the shooting image is unchanged in the change period, the n-1 th line/column feature pattern is judged to correspond to the side edge of the transparent screen.

The fourth timing rule is that all feature patterns are displayed in the dynamic detection image at first, then the feature patterns disappear from one side edge of the detection image to the middle line by line/column, the feature patterns are identified in real time through the shooting image, and when the feature patterns of the nth line/column in the dynamic detection image disappear, and the number of the feature patterns in the shooting image starts to change in a change period, the nth line/column feature patterns are judged to correspond to the side edge of the transparent screen; referring to fig. 5, fig. 5 is a schematic view of an embodiment of determining a change moment of the number of objects in a projection area adjusting method of a transparent screen according to an embodiment of the present application, where each grid intersection point is shown as a feature pattern, and an actual feature pattern may be a pattern such as a polygon mentioned above.

302, if the timing rule is the second timing rule or the third timing rule, identifying feature patterns on two adjacent pairs of photographed images, and obtaining a target number change time when the number of patterns stops changing.

The second time sequence rule is that the feature pattern is not displayed in the dynamic detection image at first, but the feature pattern appears from the middle of the image to one side edge line by line/column, the feature pattern is identified in real time through the shot image, when the feature pattern of the nth row/column in the dynamic detection image appears, and the number of the feature patterns in the shot image is unchanged in the change period, the n-1 th row/column feature pattern is judged to correspond to the side edge of the transparent screen;

Displaying all feature patterns in the dynamic detection image according to the third time sequence rule, enabling the feature patterns to disappear from the middle of the image to one side edge line by line/column, identifying the feature patterns in real time through the shot image, and judging that the n-1 th line/column feature patterns correspond to the side edge of the transparent screen when the feature patterns of the nth line/column in the dynamic detection image disappear and the number of the feature patterns in the shot image is unchanged in a change period;

according to the method, the feature patterns corresponding to the four side edges of the transparent screen are sequentially found out, a rectangular area is constructed based on the feature patterns, the rectangular area represents the approximate frame of the transparent screen, and the change time of the target number of the feature patterns is determined according to the time sequence rule, so that the frame is accurately targeted.

As shown in fig. 6, fig. 6 is a flowchart illustrating an embodiment of transparent screen frame determination in the method for adjusting a projection area of a transparent screen according to an embodiment of the present application, in this embodiment, step 203 further includes steps 401 to 402:

401, inquiring a preset mapping relation table, and acquiring a corresponding target feature pattern in the time sequence rule at the moment of the change of the target quantity and a target pattern coordinate of the target feature pattern; the preset mapping relation table comprises characteristic patterns displayed at different moments of the dynamic detection image and association relations between pattern coordinates of the characteristic patterns;

The method comprises the steps that a preset mapping relation table in the projection equipment is a characteristic pattern corresponding to each change moment in a pre-recorded dynamic detection image and pattern coordinates of the characteristic pattern, for example, the dynamic detection image is a matrix of 400 characteristic patterns formed by 20 x 20, the pattern quantity change rule of the characteristic patterns is a matrix of 400 characteristic patterns displayed at the beginning, and each interval is a matrix of 20 characteristic patterns which disappears in a row; the method comprises the steps of presetting numbers of 400 characteristic patterns and pattern coordinates corresponding to the 400 characteristic patterns in a mapping relation table; the method comprises the steps of displaying numbers of 380 feature patterns and pattern coordinates corresponding to the 380 feature patterns in a first second in a preset mapping relation table; and displaying the numbers of the 360 feature patterns and the pattern coordinates corresponding to the 360 feature patterns in the second in the preset mapping relation table, and the like.

The projection device queries a preset mapping relation table, and obtains the target feature patterns displayed in the time sequence rule at the moment of change of the target quantity and the target pattern coordinates of the target feature patterns, for example, numbers of 360 feature patterns and pattern coordinates corresponding to the 360 feature patterns are displayed in the second in the preset mapping relation table.

And 402, setting the object pattern coordinate of the most edge in the object pattern coordinates as an object frame in the shooting image.

The projection device sets the object pattern coordinate at the most edge of the object pattern coordinates as the object frame in the photographed image, and it can be understood that in this embodiment, the description is given by taking the single change of each row/column of the feature pattern in the dynamic detection image as an example, and the timing rule of the feature pattern change in the dynamic detection image in the actual scene can be flexibly set.

According to the preset mapping relation table corresponding to the feature pattern change in the dynamic detection image in the projection device, the projection image can quickly determine the target frame in the shooting image according to the preset mapping relation table, so that the frame of the transparent screen can be accurately obtained.

Referring to fig. 7, fig. 7 is a flowchart illustrating an embodiment of trapezoidal correction in the method for adjusting the projection area of the transparent screen according to the embodiment of the present application.

In some embodiments of the present application, step 201 is performed before projecting the dynamic probe image onto the transparent screen, specifically, steps 501-503:

501, projecting a preset calibration image to a transparent screen, and shooting the transparent screen on which the preset calibration image is projected to obtain a shooting image;

502, establishing a homography matrix according to a first position of a calibration pattern in the preset calibration image and a second position of the calibration pattern in the shooting image;

and 503, performing trapezoidal correction on the dynamic detection image to be projected according to the homography matrix so as to project the dynamic detection image subjected to trapezoidal correction to the transparent screen.

In the embodiment, the projection device projects a preset calibration image to the transparent screen, and shoots the transparent screen on which the preset calibration image is projected to obtain a shooting image; the projection equipment establishes a homography matrix according to a first position of a calibration pattern in the preset calibration image and a second position of the calibration pattern in the shooting image. And carrying out trapezoidal correction on the dynamic detection image to be projected according to the homography matrix so as to project the dynamic detection image subjected to trapezoidal correction to the transparent screen, and accurately determining the screen frame of the transparent screen.

When the projection device is projected to the side opposite to the screen, based on the original projection image in the projection device (the image projected onto the transparent screen will generate trapezoidal deformation to affect the impression, therefore, based on the pre-stored calibration image in the projection device, the image containing the calibration pattern is projected onto the transparent screen, the calibration pattern is approximately positioned in the middle area of the calibration image, so that the calibration pattern can be projected into the transparent screen more easily after the calibration image is projected out.

It will be appreciated that the projection device may perform a trapezoidal correction on each of the changed images in the dynamic probe image, and then project the corrected images. The dynamic detection image comprises a plurality of feature patterns which are scattered at intervals and disappear or appear in a preset direction according to time sequence, the feature patterns in the dynamic detection image can be array point sets, polygon patterns which are arranged in an array mode, strip patterns which are arranged at intervals, and the feature patterns initially occupy or almost occupy the dynamic detection image or are at least arranged in peripheral areas in the detection image.

In the embodiment of the application, the dynamic detection image is used as the calibration image, so that only one detection image is needed, the calibration image is not required to be additionally preset, and the same image is changed when the trapezoid correction and the curtain entering are performed, so that the conversion between two images with larger difference is not performed, the user experience can be improved, meanwhile, the resolutions of the original detection image and the detection image after the trapezoid correction are consistent, and the resolution of the original target projection image to be projected is generally consistent with the resolution of the original detection image.

As shown in fig. 8, fig. 8 is a schematic structural view of an embodiment of a projection area adjusting apparatus for a transparent screen according to an embodiment of the present application.

In order to better implement the method for adjusting the projection area of the transparent screen in the embodiment of the present application, on the basis of the method for adjusting the projection area of the transparent screen, the embodiment of the present application further provides a device for adjusting the projection area of the transparent screen, where the device for entering the screen of the transparent screen includes:

a projection module 601, configured to project a dynamic detection image onto a transparent screen, where the dynamic detection image includes feature patterns, and each feature pattern changes in number in a preset direction according to a timing rule;

the identifying module 602 is configured to collect photographed images of the transparent screen, and identify a change moment of the target number of the feature patterns according to the timing rule and each of the photographed images; the target quantity change time is the time when the pattern quantity of the characteristic pattern in the shot image starts to change or stops changing;

a determining module 603, configured to determine a target frame according to a corresponding target feature pattern in the timing rule at the time point when the target number changes;

and the adjusting module 604 is configured to adjust the projection area according to the target frame.

The embodiment of the application also provides a projection area adjusting device of the transparent screen, which is also used for:

The embodiment of the application also provides a device for adjusting the projection area of the transparent screen, which is further used for:

the timing rules include any one of a first timing rule, a second timing rule, a third timing rule, and a fourth timing rule:

The embodiment of the present application further provides a device for adjusting a projection area of a transparent screen, which executes the step of identifying a change time of the target number of the feature pattern according to the timing rule and each of the captured images, and includes:

The embodiment of the application also provides a device for adjusting the projection area of a transparent screen, which executes the corresponding target feature pattern in the time sequence rule according to the target quantity change time to determine a target frame, and comprises the following steps:

The embodiment of the application also provides a device for adjusting the projection area of the transparent screen, which is used for adjusting the projection area according to the target frame and comprises the following steps:

The embodiment of the application also provides a projection area adjusting device of the transparent screen, which is used for controlling the acquisition of shot images according to the time sequence rule presented by the characteristic patterns in the dynamic detection images by projecting the dynamic detection images onto the transparent screen, and identifying the target quantity change moment of the characteristic patterns according to the quantity change of the characteristic patterns in each shot image so as to obtain the target frame corresponding to the transparent screen, thereby realizing automatic screen entering without manual adjustment, and enabling the transparent screen to be more convenient and accurate.

The embodiment of the application also provides a projection device, as shown in fig. 9, and fig. 9 is a schematic structural diagram of an embodiment of the projection device provided in the embodiment of the application.

The projection device integrates the projection area adjusting device of any transparent screen provided by the embodiment of the application, and the projection device comprises:

one or more processors;

a memory; and

one or more application programs, wherein the one or more application programs are stored in the memory and configured to be executed by the processor to perform the steps in the method for adjusting the projection area of the transparent screen described in any of the above embodiments of the method for adjusting the projection area of the transparent screen.

Specifically, the present application relates to a method for manufacturing a semiconductor device. The projection device may include components such as a processor 701 of one or more processing cores, a memory 702 of one or more computer storage media, a power supply 703, and an input unit 704. It will be appreciated by those skilled in the art that the projection device structure shown in fig. 9 is not limiting of the projection device and may include more or fewer components than shown, or may combine certain components, or a different arrangement of components. Wherein:

the processor 701 is a control center of the projection device, connects various parts of the entire projection device using various interfaces and lines, and performs various functions of the projection device and processes data by running or executing software programs and/or modules stored in the memory 702, and invoking data stored in the memory 702, thereby performing overall monitoring of the projection device. Optionally, processor 701 may include one or more processing cores; preferably, the processor 701 may integrate an application processor and a modem processor, wherein the application processor primarily handles operating systems, user interfaces, applications, etc., and the modem processor primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 701.

The memory 702 may be used to store software programs and modules, and the processor 701 executes various functional applications and data processing by executing the software programs and modules stored in the memory 702. The memory 702 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like; the storage data area may store data created according to the use of the projection device, etc. In addition, the memory 702 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage device. Accordingly, the memory 702 may also include a memory controller to provide access to the memory 702 by the processor 701.

The projection device further includes a power supply 703 for powering the various components, preferably the power supply 703 is logically connected to the processor 701 via a power management system, such that functions such as charge, discharge, and power consumption management are performed by the power management system. The power supply 703 may also include one or more of any component, such as a direct current or alternating current power supply, a recharging system, a power failure detection circuit, a power converter or inverter, a power status indicator, etc.

The projection device may further comprise an input unit 704, which input unit 704 may be used for receiving input digital or character information and generating keyboard, mouse, joystick, optical or trackball signal inputs in connection with user settings and function control.

Although not shown, the projection apparatus may further include a display unit or the like, which is not described herein. In this embodiment, the processor 701 in the projection device loads executable files corresponding to the processes of one or more application programs into the memory 702 according to the following instructions, and the processor 701 executes the application programs stored in the memory 702, so as to implement various functions as follows:

and adjusting a projection area according to the target frame.

Those of ordinary skill in the art will appreciate that all or a portion of the steps of the various methods of the above embodiments may be implemented by instructions, or by instruction control related hardware, that may be stored on a computer storage medium and loaded and executed by a processor.

To this end, an embodiment of the present invention provides a computer storage medium, which may include: read Only Memory (ROM), random access Memory (RAM, random Access Memory), magnetic or optical disk, and the like. On which a computer program is stored, which is loaded by a processor to perform the steps of any one of the methods for adjusting the projection area of a transparent screen provided by the embodiments of the present invention. For example, the loading of the computer program by the processor may perform the steps of:

and adjusting a projection area according to the target frame.

In the foregoing embodiments, the descriptions of the embodiments are focused on, and the portions of one embodiment that are not described in detail in the foregoing embodiments may be referred to in the foregoing detailed description of other embodiments, which are not described herein again.

In the implementation, each unit or structure may be implemented as an independent entity, or may be implemented as the same entity or several entities in any combination, and the implementation of each unit or structure may be referred to the foregoing method embodiments and will not be repeated herein.

The specific implementation of each operation above may be referred to the previous embodiments, and will not be described herein.

The method for adjusting the projection area of the transparent screen, the projection device, the computer storage medium and the computer storage medium provided by the application are described in detail, and specific examples are applied to illustrate the principle and the implementation of the application, and the description of the above examples is only used for helping to understand the method and the core idea of the application; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present application, the present description should not be construed as limiting the present application.

Claims

1. A method for adjusting a projected area of a transparent screen, the method comprising:

and adjusting a projection area according to the target frame.

2. The method for adjusting a projection area of a transparent screen according to claim 1, wherein the capturing a photographed image of the transparent screen comprises:

3. The method according to claim 1, wherein the timing rule includes any one of a first timing rule, a second timing rule, a third timing rule, and a fourth timing rule:

4. The method according to claim 3, wherein the step of identifying the target number change timing of the feature pattern based on the timing rule and each of the captured images, comprises:

5. The method for adjusting a projection area of a transparent screen according to claim 1, wherein determining a target frame according to the target feature pattern corresponding to the timing rule at the time of the change in the target number comprises:

6. The method for adjusting a projection area of a transparent screen according to claim 1, wherein the adjusting a projection area according to the target frame comprises:

7. The method for adjusting a projection area of a transparent screen according to any one of claims 1 to 6, wherein before projecting the dynamic probe image onto the transparent screen, the method comprises:

8. The method for adjusting a projection area of a transparent screen according to claim 1, wherein the step of projecting a dynamic probe image onto the transparent screen, the dynamic probe image including feature patterns, each of the feature patterns changing in number in a predetermined direction according to a time sequence rule, comprises:

the dynamic detection image changes the row or column number of the characteristic pattern in a preset direction according to a time sequence rule;

and the step of collecting the shot images of the transparent screen and identifying the change time of the target quantity of the characteristic patterns according to the time sequence rule and each shot image comprises the following steps:

determining a target quantity change moment of the characteristic pattern according to the shot image of which the pattern quantity of the characteristic pattern starts to change or stops to change;

the step of determining the target frame according to the target feature pattern corresponding to the time sequence rule at the time of the target quantity change comprises the following steps:

9. A projection device, the projection device comprising:

One or more processors;

a memory; and

one or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the processor to implement the steps in the method of adjusting the projected area of the transparent screen of any one of claims 1 to 8.

10. A computer readable storage medium storing a plurality of instructions adapted to be loaded by a processor to perform the steps in the method for adjusting the projected area of a transparent screen according to any one of claims 1 to 8.