WO2023029458A1

WO2023029458A1 - Correction method and apparatus, device and storage medium

Info

Publication number: WO2023029458A1
Application number: PCT/CN2022/083346
Authority: WO
Inventors: 余金清; 王鑫
Original assignee: 成都极米科技股份有限公司
Priority date: 2021-08-31
Filing date: 2022-03-28
Publication date: 2023-03-09
Also published as: CN115733963A

Abstract

Disclosed in embodiments of the present application are a correction method and apparatus, a device, and a storage medium. The correction method comprises: in the case of detecting a trigger operation for an automatic keystone correction function, obtaining a first correction parameter corresponding to a current user, then optimizing, according to the first correction parameter, an angle parameter obtained on the basis of three-dimensional reconstruction, and further performing automatic keystone correction on a first projected picture according to the optimized angle parameter. That is, according to the embodiments of the present application, after the automatic keystone correction function of a projection device is triggered, the angle parameter obtained by the three-dimensional reconstruction can be optimized using a correction parameter corresponding to the current user, such that the accuracy of an included angle of the projection device with respect to a carrier is improved, thus improving the correction effect of the first projected picture, and satisfying user requirements.

Description

A calibration method, device, equipment and storage medium

technical field

The embodiments of the present application relate to the field of optical technologies, and in particular, to a calibration method, device, equipment, and storage medium.

Background technique

In the daily use of projection equipment, usually due to factors such as the tilted position of the projection equipment and the non-perpendicular projection direction to the projection surface, the projected picture becomes a non-rectangular shape such as a trapezoid, which affects the user's viewing effect.

At present, the projection screen is mainly corrected by means of structured light. This method has high requirements on the structural state of the projection equipment. If the projection equipment is impacted by falling during transportation or use, its structural state will change. , will affect the correction effect of the projected screen.

application content

Embodiments of the present application provide a correction method, device, device, and storage medium, which can improve the correction effect of a projected picture.

In the first aspect, an embodiment of the present application provides a calibration method applied to a projection device, the method comprising:

displaying the first projected image;

If a trigger operation for the automatic keystone correction function is detected, acquire a first correction parameter corresponding to the current user;

Optimizing an angle parameter obtained based on three-dimensional reconstruction according to the first correction parameter, where the angle parameter is an angle parameter of the projection device relative to the carrier carrying the projection picture;

Automatic keystone correction is performed on the first projected picture according to the optimized angle parameters.

In the second aspect, an embodiment of the present application provides a calibration device, which is set on a projection device, and the device includes a display module, an acquisition module, an optimization module, and a calibration module;

a display module, configured to display the first projected image;

An obtaining module, configured to obtain the first correction parameter corresponding to the current user when a trigger operation for the automatic keystone correction function is detected;

An optimization module, configured to optimize an angle parameter obtained based on three-dimensional reconstruction according to the first correction parameter, where the angle parameter is an angle parameter of the projection device relative to the carrier carrying the projection screen;

The correction module is used for performing automatic keystone correction on the first projected image according to the optimized angle parameters.

In a third aspect, an embodiment of the present application provides a projection device, including an automatic projection correction system and a memory; the automatic projection correction system includes a camera module, a projection light engine, and a processor;

A projection light machine for projecting projection images;

The camera module is used to shoot the projection screen;

memory for storing computer program instructions;

When the computer program instructions are executed by the processor, the method as described in the first aspect is implemented.

In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which computer program instructions are stored. When the computer program instructions are executed by a processor, the method described in the first aspect is implemented.

The calibration method, device, equipment, and storage medium provided in the embodiments of the present application acquire the first calibration parameter corresponding to the current user when a trigger operation for the automatic keystone calibration function is detected, and then optimize the calibration based on the first calibration parameter according to the first calibration parameter. The angle parameters obtained from the three-dimensional reconstruction are used to perform automatic trapezoidal correction on the first projected picture according to the optimized angle parameters. That is, in the embodiment of the present application, after the automatic trapezoidal correction function of the projection device is triggered, the correction parameters corresponding to the current user can be used to optimize the angle parameters obtained from the 3D reconstruction, which improves the accuracy of the included angle of the projection device relative to the carrier. In this way, the correction effect of the first projected image is improved, and the needs of users are met.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the accompanying drawings that need to be used in the embodiments of the present application. Additional figures can be derived from these figures.

FIG. 1 is a schematic diagram of a scene of a correction method provided by an embodiment of the present application;

Fig. 2 is a flow chart of a correction method provided by the embodiment of the present application;

Fig. 3 is a flowchart of another correction method provided by the embodiment of the present application;

FIG. 4 is a schematic diagram of an adjustment interface provided by an embodiment of the present application;

FIG. 5 is a schematic diagram of a prompt message provided by an embodiment of the present application;

FIG. 6 is a flow chart of another correction method provided by the embodiment of the present application;

FIG. 7 is a structural diagram of a calibration device provided in an embodiment of the present application;

FIG. 8 is a structural diagram of a projection device provided by an embodiment of the present application.

Detailed ways

The characteristics and exemplary embodiments of various aspects of the application will be described in detail below. In order to make the purpose, technical solution and advantages of the application clearer, the application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only configured to explain the application, not to limit the application. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by showing examples of the present application.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. There is no such actual relationship or order between them. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the statement "comprising..." does not exclude the presence of additional same elements in the process, method, article or device comprising said element.

When using a projection device to project a projection screen, the shape of the projection screen on the carrier will be distorted due to factors such as the tilt of the projection device, the projection direction of the projection device and the carrier carrying the projection screen, etc., which will affect users. viewing effect. For this reason, it is necessary to correct the projection screen so that its shape meets the needs of the user.

At present, the structured light system is mainly constructed by using the camera module and the projection light machine, and the three-dimensional reconstruction of the projection scene is carried out by the structured light system, and the angle between the projection equipment and the projection screen is obtained, and the projection screen is corrected according to the angle; Adjust the placement position of the projection equipment to realize the correction of the projection screen.

The former has higher requirements on the structural state of the projection equipment. If the projection equipment is impacted during transportation or use, resulting in changes in its structural state, it will affect the relative positional relationship between the camera module and the projection light machine and the projection light machine. Optical performance, etc., lead to a deviation in the included angle of the projection device relative to the projection screen, and the correction effect of the projection screen becomes poor. The latter has higher requirements on users and is more difficult to operate, and the projection screen cannot be effectively corrected only by adjusting the placement position of the projection device.

For this reason, the embodiment of the present application provides a correction method, which can improve the correction effect of the projected picture and meet the needs of users.

The correction method provided by the embodiment of the present application can be applied to the scene shown in FIG. 1, the scene can include a projection device 10 and a carrier 11, and the projection device 10 can be a device capable of projecting an image or video onto the carrier 11, For example a projector. The projection device 10 can be applied to homes, offices, schools, entertainment venues, and the like.

The carrier 11 may be a tool capable of displaying images or videos, for example, in this embodiment of the present application, it may be used to display a projection screen projected by the projection device 10 . The carrier 11 may be, for example, a projection screen or a wall.

The projection device 10 can optimize the angle parameters obtained based on the three-dimensional reconstruction according to the correction parameters corresponding to the current user, so as to improve the correction effect of the projected picture and meet the needs of the user.

Based on the above scenario, the correction method provided by the embodiment of the present application will be described below in conjunction with specific embodiments. The method can be executed by the projection device shown in FIG. 1 .

FIG. 2 is a flow chart of a calibration method provided by an embodiment of the present application.

As shown in Figure 2, the correction method may include the following steps:

S210. Display a first projection image.

S220. Acquire a first correction parameter corresponding to the current user when a trigger operation for the automatic keystone correction function is detected.

S230. Optimizing the angle parameter obtained based on the three-dimensional reconstruction according to the first correction parameter.

Wherein, the angle parameter is an angle parameter of the projection device relative to the carrier carrying the projection picture.

S240. Perform automatic keystone correction on the first projected picture according to the optimized angle parameter.

Thus, when a trigger operation for the automatic keystone correction function is detected, the first correction parameter corresponding to the current user is obtained, and then the angle parameter obtained based on the three-dimensional reconstruction is optimized according to the first correction parameter, and then the angle parameter obtained based on the optimized angle parameter to perform automatic keystone correction on the first projected image. That is, in the embodiment of the present application, after the automatic trapezoidal correction function of the projection device is triggered, the correction parameters corresponding to the current user can be used to optimize the angle parameters obtained from the 3D reconstruction, which improves the accuracy of the included angle of the projection device relative to the carrier. In this way, the correction effect of the first projected image is improved, and the needs of users are met.

The above steps are described in detail below, as follows:

In S210, the first projected picture may be an uncorrected original projected picture projected by the projection device to the carrier.

In one embodiment, when the projection device is turned on, it can project a first projection picture onto the carrier for display.

In S220, the triggering operation here may be an operation for triggering the automatic keystone correction function, that is, an operation for enabling the automatic keystone correction function.

Exemplarily, the automatic keystone correction function can be triggered by clicking or touching the automatic keystone correction function control. Of course, other operations that can enable the automatic keystone correction function can also be used. The embodiment of the present application does not limit the specific form of the automatic keystone correction function control, for example, it may be in the form of a physical switch, a button, or a text box. Alternatively, the above-mentioned triggering operation may also be a voice operation for triggering the automatic keystone correction function, for example, it may be a voice operation with a semantic meaning of "automatic keystone correction".

When the automatic keystone correction function is turned on, the projection device can perform automatic keystone correction on the first projected picture, which can reduce requirements on users, simplify user operations, and improve correction efficiency.

The first correction parameter may be a correction parameter corresponding to the current user, and different users may correspond to different correction parameters.

In one embodiment, when a trigger operation for the automatic keystone correction function is detected, the first correction parameter corresponding to the current user may be acquired, so that correction requirements of different users may be met.

In S230, 3D reconstruction is a technology for reconstructing 3D information of the projection scene. In one embodiment, the structured light system (automatic projection correction system) in the projection device can be used to reconstruct the 3D information of the projection scene. The angle parameter of the projection device relative to the carrier can be determined by reconstructing the three-dimensional information. The angle parameter here may include the size and direction of the included angle.

In one embodiment, the automatic projection correction system may include a projection light engine, a camera module and a processor.

The projection light engine can be used to project the projection picture to the carrier, the camera module can be used to capture the projection picture or other images on the carrier, and the processor can be used to correct the shape of the projection picture on the carrier.

Specifically, the projection light machine can project specific light information onto the surface and background of the object, which is collected by the camera module, and the processor calculates the position and depth of the object according to the change of the light signal caused by the object, and then restores the entire three-dimensional space. The restored three-dimensional space calculates the included angle between the projection device and the carrier.

Of course, the automatic projection correction system may also adopt other structures than the above, as long as the included angle of the projection device relative to the carrier can be determined.

In actual application, the projection device may be impacted, causing the angle between it and the projection screen to change, which in turn causes the shape of the projection screen to be distorted, for example, the shape of the projection screen changes from rectangular to non-rectangular, which affects the user's viewing effect.

Based on this, the embodiment of the present application can use the first correction parameter to optimize the angle parameter obtained based on the three-dimensional reconstruction, improve the accuracy of the angle between the projection device and the carrier, and further improve the correction effect of the projected picture.

In an embodiment, the first correction parameter and the angle parameter may be superimposed to obtain an optimized angle parameter.

Exemplarily, the angle parameter may be divided along the horizontal direction and the vertical direction to obtain the components of the angle parameter in the horizontal direction and the vertical direction. Similarly, the first correction parameter can also be divided to obtain its components in the horizontal direction and the vertical direction.

When the direction of the horizontal component of the first correction parameter is consistent with the direction of the angle parameter in the horizontal direction, the component of the first correction parameter in the horizontal direction can be added to the component of the angle parameter in the horizontal direction; when the first correction parameter When the direction of the horizontal component is opposite to that of the angle parameter in the horizontal direction, the component of the first correction parameter in the horizontal direction can be subtracted from the horizontal component of the angle parameter, so that the optimized angle parameter in the horizontal direction can be obtained. The component of the direction.

Similarly, the component of the optimized angle parameter in the vertical direction can be obtained, and then the optimized angle parameter can be obtained.

In S240, automatic keystone correction is performed on the first projected picture according to the optimized angle parameters, which can make up for the defects of the projection equipment being impacted during transportation or use, improve the correction effect of the first projected picture, and meet the needs of current users. Usage requirements.

In one embodiment, as shown in FIG. 3, before S210, the correction method provided in this embodiment of the present application may include the following steps:

S310. Displaying a first adjustment interface.

Wherein, the first adjustment interface includes the second projection image after automatic keystone correction and at least one guide control, and the guide control includes guide information for adjusting the projection image of a non-preset shape to a projection image of a preset shape.

S320. Determine a first correction parameter corresponding to the current user in response to the current user's first input to the target guidance control.

Wherein, at least one guide control includes a target guide control, and the target guide control corresponds to the shape of the first projected image.

S330. Record the first calibration parameter.

S340. Associate and store the first correction parameter and the user information of the current user in the target storage area.

The above steps are described in detail below, as follows:

In S310, the first adjustment interface may be an interface for correcting the first projected image. The second projected picture, that is, the projected picture obtained by correcting the first projected picture by using the angle parameter obtained by three-dimensional reconstruction, can also be understood as the projected picture obtained after the first automatic correction of the first projected picture.

The guide control may be a control that guides the user to correct the shape of the first projected picture, for example, may be a rotation control.

The guide control may include guide information for adjusting the projection screen of a non-preset shape to the projection screen of a preset shape, and the guide information may include, for example, a correction direction and/or a correction angle. Through the guidance control, the user can quickly correct the first projected image to a preset shape. The preset shape may be a shape that satisfies user requirements, for example, a rectangle.

The first adjustment interface may include one guide control, or may include multiple guide controls.

When the first adjustment interface includes a guide control, the guide control may be a control for correcting the shape of the first projected picture to a default shape, and the user only needs to operate according to the instructions of the guide control, which is simple and convenient.

When the first adjustment interface includes a plurality of guide controls, the user can select an appropriate guide control according to requirements, thereby correcting the first projected image to a shape that meets his needs, thereby realizing personalized adjustment.

Exemplarily, referring to FIG. 4 , FIG. 4 includes four guide controls as an example, respectively representing left rotation, right rotation, upward rotation and downward rotation. Different rotation controls correspond to different screen shapes. For example, when the shape of the second projected picture is the shape on the left side of FIG. 4 , the guide control on the left side can be adjusted.

The shape of the second projection screen can be quickly corrected from the trapezoid shown in FIG. 4 to the rectangle shown in FIG. 4 through the guide control. In practical applications, the shape of the second projected picture may be other non-rectangular shapes except the above-mentioned trapezoid.

In S320, the target guidance control is a control corresponding to the shape of the second projected image among the above guidance controls, and when the first adjustment interface only includes one guidance control, the target guidance control is the guidance control.

When the first adjustment interface contains a plurality of guide controls, the target guide control may be one or more of the plurality of guide controls, that is, the shape of the second projection screen may be adjusted to a preset shape through a correction direction, or The shape of the second projected image is adjusted to a preset shape through a plurality of correction directions. When multiple correction directions need to be adjusted, the corresponding target guide controls can be adjusted in sequence.

The first input may be an input for changing the shape of the second projected picture. Exemplarily, the first input may act on the target guidance control to change the rotation direction and/or rotation angle of the target guidance control, so as to change the second projection. The shape of the second projected picture realizes the correction of the second projected picture.

In one embodiment, the first input can be directly used as the first correction parameter, or a certain operation can be performed on the first input to obtain the correction parameter corresponding to the first input as the first correction parameter. The specific calculation rule book The application examples are not limited.

The first input may include one input or multiple inputs.

Taking the first input including multiple inputs as an example, in one embodiment, S320 may include the following steps:

Count the number of times the current user enters the target guide control and the step value corresponding to each input. The step value includes the input direction and angle;

The step value corresponding to each input is accumulated to obtain the correction direction and correction angle as the first correction parameter corresponding to the current user.

For example, in the horizontal left direction, three inputs are included, each input corresponds to a step value of 0.5 degrees, and the first correction parameter is to rotate left by 1.5 degrees.

In S330, the first calibration parameter is recorded, and the first calibration parameter can be obtained directly when the projection device is used next time without manual adjustment by the user, thereby simplifying user operations and improving calibration efficiency.

In S340, the user information may be information used to identify the identity of the user, for example, may include account information, user name, password, ID, face information, or ID number of an application that can control the projection device.

The first correction parameter and the current user's user information are associated and stored in the target storage area. When the user uses the projection device next time, the correction parameter corresponding to the user can be obtained based on the user's user information, and then optimized according to the correction parameter. Based on the angle parameters obtained from the three-dimensional reconstruction, a projected image that meets the needs of the user is obtained without manual adjustment by the user, which simplifies the user's operation and improves efficiency. Wherein, the above-mentioned target storage area may be a local storage area of the projection device, or a cloud storage area or a blockchain storage area, which is not limited in this application.

The embodiment of the present application does not limit the target storage area.

In one embodiment, S220 may include the following steps:

Get the user information of the current user;

According to the user information, the first correction parameter corresponding to the current user is acquired from the target storage area.

In one embodiment, assuming that the above-mentioned application that can control the projection device is simply referred to as a projection application, the user can log in to the projection application through a mobile phone to remotely control the projection device. At this time, the mobile phone can serve as a remote control of the projection device. After logging into the projection application through the mobile phone, the user can input a trigger operation for the automatic keystone correction function. When the projection device detects the trigger operation, it can obtain the account information of the user in the projection application, and use the account information as the user's user information .

In one embodiment, the image of the user can be collected, and the user information of the current user can be determined according to the face recognition result; the user information of the current user can also be determined according to the user name and password of the user logging into the projection device. Of course, the user information of the current user may also be determined in other ways, which is not limited in this embodiment of the present application.

According to the user information, the first calibration parameter corresponding to the user information can be obtained by searching the target storage area.

In one embodiment, after the projection device is turned on, the first adjustment interface may be automatically displayed, and at this time, the user may input correction information on the first adjustment interface according to actual needs.

In one embodiment, the first adjustment interface may also be displayed again when the user has a need for correction. Based on this, before S310, the correction method may also include the following steps:

Displaying prompt information, where the prompt information is used to prompt the user whether to correct the shape of the first projected picture.

The prompt information can be, for example, a prompt box as shown in Figure 5. When the user selects "Yes", it means that the user needs to correct the shape of the first projected picture again. At this time, the first adjustment interface can be displayed; In the case of ", it means that the user does not need to correct the shape of the first projected image again. At this time, the prompt box can be exited, that is, the first adjustment interface will not be displayed again.

Thus, whether to display the first adjustment interface can be determined according to the actual needs of the user, which meets the personalized needs of the user.

Correspondingly, S310 may include the following steps:

In response to the user's input of displaying prompt information, a first adjustment interface is displayed.

The input here may be an input to display the first adjustment interface, for example, it may be "yes" as shown in Figure 5, that is, only when the user selects the "yes" in the prompt box, the first adjustment interface will be displayed, satisfying The actual correction needs of users are met.

In one embodiment, as shown in FIG. 6, before S210, the correction method provided in the embodiment of the present application may further include the following steps:

S610. Display the second projection image after automatic keystone correction.

S620. Determine the shape of the second projected picture when a correction trigger operation for the second projected picture is detected.

S630. Determine a target guidance control corresponding to the shape of the second projected picture according to the correspondence between the non-preset shape and the guidance information.

S640. Display a second adjustment interface.

Wherein, the second adjustment interface includes target guidance controls and a second projected image.

S650. Determine a first correction parameter corresponding to the current user in response to a second input of the current user to the target guidance control.

The above steps are described in detail below, as follows:

In S610, the process of displaying the second projected picture is similar to the process of displaying the first projected picture. For details, refer to the description of the first projected picture, which will not be repeated here for brevity.

In S620, the correction triggering operation here may be an operation of triggering the correction function of the second projected picture, and when the shape of the second projected picture needs to be corrected, the corresponding correction function needs to be triggered.

Exemplarily, the correction trigger control can be clicked or touched to trigger the correction function of the second projected picture, so that the shape of the second projected picture can be corrected. Of course, other manners may also be used, which are not limited in this embodiment of the present application. The embodiment of the present application does not limit the specific form of the correction trigger control, for example, it may be in the form of a physical switch, a button, or a text box.

When a correction trigger operation for the second projected picture is detected, the shape of the second projected picture may be determined to provide a basis for subsequent determination of the target guide control.

In S630, the target guide control may be a guide control for adjusting the shape of the second projected picture to a preset shape.

Exemplarily, as shown in Figure 4, if the shape of the second projected picture is the trapezoid on the left in Figure 4, in the case that the shape of the second projected picture can be adjusted to a preset shape only by adjusting the guide control, It can be determined that the target guide control is the guide control corresponding to the left trapezoid.

In S640, the controls contained in the second adjustment interface may only include target guide controls, that is, only guide controls related to the shape of the second projected picture, and not include guide controls not related to the shape of the second projected picture.

For example, the target guide control is the guide control corresponding to the trapezoid on the left in FIG. 4 , and the second adjustment interface only includes the guide control corresponding to the shape and the row shape.

Therefore, the user's operation can be simplified, and the user does not need to determine the target guide control from multiple guide controls, which reduces the number of corrections and improves the correction efficiency.

In S650, reference may be made to the foregoing embodiments for the determination process of the first calibration parameter, and for brevity of description, details are not repeated here.

In one embodiment, when the shape of the corrected projected picture meets the user's requirements, the adjustment interface can be exited.

For example, when the input to the adjustment interface is not detected within the set duration, it is considered that the shape of the corrected projection screen meets the requirements, and the adjustment interface can be exited at this time; or, the user closes the button for exiting the adjustment interface, and exits the adjustment interface; or , after the user adjusts once, a prompt box may pop up to prompt the user whether to continue to adjust, and if the user selects "No", the adjustment interface can be exited.

In one embodiment, the first projected picture can be corrected in the following manner to obtain the second projected picture:

Obtain the first position coordinates of the target point in the first coordinate system in the first projected picture. The first projected picture is obtained by the camera module shooting the carrier carrying the projected picture. The first coordinate system is the coordinates where the camera module is located. Tie;

According to the association relationship between the first coordinate system and the second coordinate system, and the first position coordinates, determine the second position coordinates of the target point in the second coordinate system, and the second coordinate system is the coordinate system where the projection light machine is located;

performing plane fitting on the second position coordinates of the target point to obtain a fitting plane;

According to the included angle between the fitting plane and the plane where the second coordinate system is located, the first projection picture is corrected to obtain the second projection picture.

The target point may be any point on the first projection screen. The first coordinate system is the space Cartesian coordinate system where the camera module is located, and the origin of the first coordinate system is the center point of the camera lens of the camera module, that is to say, the first position coordinate is the space Cartesian coordinate system where the target point is in the camera module The location coordinates in .

The second coordinate system is a space Cartesian coordinate system established with the optical center of the projection optics lens as the origin.

The association relationship between the first coordinate system and the second coordinate system is also the transformation relationship between the position coordinates of a point in the space in the first coordinate system and the second coordinate system. The embodiment of the present application does not specifically limit the process of determining the conversion relationship.

Under normal circumstances, the carrier is a plane. After obtaining the position coordinates of multiple target points on the plane in the second coordinate system, the carrier can be fitted in the second coordinate system to obtain a fitting plane. The included angle between the fitting plane and the plane where the second coordinate system is located is the included angle between the carrier and the projection device. According to the included angle, the first projected picture can be corrected to obtain the second projected picture.

Thus, the angle between the projection device and the carrier can be obtained through geometric calculations, and the first projected image can be automatically corrected according to the angle, without the need for the user to adjust the placement of the projection device, which simplifies the user's operation and improves efficiency.

Based on the same inventive concept, an embodiment of the present application also provides a calibration device, which can be set on a projection device, and the projection device can be a device capable of projecting an image or video onto a carrier, such as a projector. The correction device provided by the embodiment of the present application will be described in detail below with reference to FIG. 7 . The device can be set on projection equipment.

FIG. 7 is a structural diagram of a calibration device provided by an embodiment of the present application.

As shown in Figure 7, the correction device may include a display module 71, an acquisition module 72, an optimization module 73 and a correction module 74;

A display module 71, configured to display the first projected image;

An acquisition module 72, configured to acquire the first correction parameter corresponding to the current user when a trigger operation for the automatic keystone correction function is detected;

The optimization module 73 is configured to optimize the angle parameter obtained based on the three-dimensional reconstruction according to the first correction parameter, where the angle parameter is an angle parameter of the projection device relative to the carrier carrying the projection picture.

The correction module 74 is configured to perform automatic keystone correction on the first projected image according to the optimized angle parameters.

The above-mentioned calibration device is described in detail below, specifically as follows:

In one embodiment, the display module 71 is further configured to display a first adjustment interface before displaying the first projection image, the first adjustment interface includes the second projection image after automatic keystone correction and at least one guide control, the guide control including guide information for adjusting the projected picture of the non-preset shape to the projected picture of the preset shape;

The device may also include: a determining module,

A determination module, configured to determine a first correction parameter corresponding to the current user in response to the current user's first input to the target guidance control;

The at least one guidance control includes an object guidance control corresponding to the shape of the second projected picture.

In one embodiment, the first input includes at least one input;

Identify modules, specifically for:

In one embodiment, the device may also include:

A recording module, configured to record the first correction parameter after the determination module determines the first correction parameter corresponding to the current user in response to the current user's first input to the target guide control;

The storage module is used for associating and storing the first correction parameter and the user information of the current user in the target storage area.

In one embodiment, the obtaining module 72 is specifically used for:

Get the user information of the current user;

In one embodiment, the display module 71 is further configured to display the second projection image after automatic keystone correction before displaying the first projection image;

The determining module is further configured to determine the shape of the second projected picture when a correction trigger operation for the second projected picture is detected;

The determination module is also used to determine the target guidance control corresponding to the shape of the second projection picture according to the correspondence between the non-preset shape and the guidance information, and the guidance information is used to adjust the projection picture of the non-preset shape to the preset Shaped projection screen;

The display module 71 is also used to display a second adjustment interface, the second adjustment interface includes target guidance controls and a second projection screen;

The determination module is further configured to determine the first correction parameter corresponding to the current user in response to the second input of the current user to the target guidance control.

In one embodiment, the optimization module 73 is specifically used for:

The first correction parameter and the angle parameter are superimposed to obtain the optimized angle parameter.

Each module in the device shown in FIG. 7 has the function of realizing each step in FIG. 2 , FIG. 3 and FIG. 6 and can achieve corresponding technical effects. For the sake of concise description, details will not be repeated here.

Based on the same inventive concept, embodiments of the present application further provide a projection device, which may be, for example, a device capable of projecting images or videos onto a carrier, such as a projector. The projection device provided by the embodiment of the present application will be described in detail below with reference to FIG. 8 .

As shown in Figure 8, the projection device may include an automatic projection correction system 81 and a memory 82 for storing computer program instructions.

The automatic projection correction system 81 may include a camera module 810 , a projection light engine 811 and a processor 812 .

The projection light engine 811 is used for projecting the projection picture; the camera module 811 is used for shooting the projection picture.

The processor 812 may include a central processing unit (Central Processing Unit, CPU), or a specific integrated circuit (Application Specific Integrated Circuit, ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application.

Memory 82 may include mass storage for data or instructions. By way of example and not limitation, memory 82 may include a hard disk drive (Hard Disk Drive, HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a Universal Serial Bus (Universal Serial Bus, USB) drive or two or more Combinations of multiple of the above. In one example, memory 82 may include removable or non-removable (or fixed) media, or memory 82 may be a non-volatile solid-state memory. In one example, the memory 82 may be a read only memory (Read Only Memory, ROM). In one example, the ROM can be mask programmed ROM, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), electrically rewritable ROM (EAROM), or flash memory or both. A combination of one or more of the above.

The processor 812 reads and executes the computer program instructions stored in the memory 82 to realize the method in the embodiment shown in FIG. 2 , FIG. 3 and FIG. 6 , and achieve the execution of the embodiment shown in FIG. 2 , FIG. The corresponding technical effects achieved by the method are briefly described and will not be repeated here.

In one example, the projection device may further include a communication interface 83 and a bus 84 . Wherein, as shown in FIG. 8 , an automatic projection correction system 81 , a memory 82 , and a communication interface 83 are connected through a bus 84 to complete mutual communication.

The communication interface 83 is mainly used to implement communication between various modules, devices and/or devices in the embodiments of the present application.

Bus 84, including hardware, software, or both, couples the various components of the projection device to each other. For example and without limitation, the bus 84 may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (Extended Industry Standard Architecture, EISA) bus, a Front Side Bus (FSB), Hyper Transport (HT) interconnect, Industry Standard Architecture (ISA) bus, InfiniBand interconnect, Low Pin Count (LPC) bus, memory bus, Micro Channel Architecture (MCA) bus, peripheral components Interconnect (PCI) bus, PCI-Express (PCI-X) bus, Serial Advanced Technology Attachment (SATA) bus, Video Electronics Standards Association Local (VLB) bus, or other suitable bus or two or more of these The combination. Bus 84 may comprise one or more buses, where appropriate. Although the embodiments of this application describe and illustrate a particular bus, this application contemplates any suitable bus or interconnect.

The projection device may execute the correction method in the embodiment of the present application after displaying the first projected picture, thereby realizing the correction method described in conjunction with FIG. 2 , FIG. 3 and FIG. 6 and the correction device described in FIG. 7 .

In addition, in combination with the correction methods in the foregoing embodiments, the embodiments of the present application may provide a computer storage medium for implementation. Computer program instructions are stored on the computer storage medium; when the computer program instructions are executed by a processor, any correction method in the above-mentioned embodiments is implemented.

It is to be understood that the application is not limited to the specific configurations and processes described above and shown in the figures. For conciseness, detailed descriptions of known methods are omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present application is not limited to the specific steps described and shown, and those skilled in the art may make various changes, modifications and additions, or change the order of the steps after understanding the spirit of the present application.

The functional blocks shown in the structural block diagrams described above may be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, it may be, for example, an electronic circuit, an Application Specific Integrated Circuit (ASIC), appropriate firmware, a plug-in, a function card, and the like. When implemented in software, the elements of the present application are the programs or code segments employed to perform the required tasks. Programs or code segments can be stored in machine-readable media, or transmitted over transmission media or communication links by data signals carried in carrier waves. "Machine-readable medium" may include any medium that can store or transmit information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, Radio Frequency (RF) links, etc. wait. Code segments may be downloaded via a computer network such as the Internet, an Intranet, or the like.

It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, the present application is not limited to the order of the above steps, that is, the steps may be performed in the order mentioned in the embodiment, or may be different from the order in the embodiment, or several steps may be performed simultaneously.

Aspects of the embodiments of the present application are described above with reference to flowcharts and/or block diagrams of methods, apparatuses (systems) and computer program products according to the embodiments of the present application. It will be understood that each block of the flowchart and/or block diagrams, and combinations of blocks in the flowchart and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine such that execution of these instructions via the processor of the computer or other programmable data processing apparatus enables Implementation of the functions/actions specified in one or more blocks of the flowchart and/or block diagrams. Such processors may be, but are not limited to, general purpose processors, special purpose processors, application specific processors, or field programmable logic circuits. It can also be understood that each block in the block diagrams and/or flowcharts and combinations of blocks in the block diagrams and/or flowcharts can also be realized by dedicated hardware for performing specified functions or actions, or can be implemented by dedicated hardware and Combination of computer instructions to achieve.

The above is only a specific implementation of the present application, and those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described systems, modules and units can refer to the foregoing method embodiments The corresponding process in , will not be repeated here. It should be understood that the protection scope of the present application is not limited thereto, and any person familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the application, and these modifications or replacements should cover all Within the protection scope of this application.

Claims

A calibration method, characterized in that it is applied to a projection device, the method comprising:

displaying the first projected image;

If a trigger operation for the automatic keystone correction function is detected, acquire a first correction parameter corresponding to the current user;

Optimizing an angle parameter obtained based on three-dimensional reconstruction according to the first correction parameter, where the angle parameter is an angle parameter of the projection device relative to a carrier carrying the projection picture;

Automatic keystone correction is performed on the first projected picture according to the optimized angle parameters.
The method according to claim 1, wherein before displaying the first projected picture, the method further comprises:

A first adjustment interface is displayed, the first adjustment interface includes the second projection screen after automatic keystone correction and at least one guide control, and the guide control includes a function for adjusting the projection screen of a non-preset shape to a preset shape Guidance information of the projected screen;

determining a first correction parameter corresponding to the current user in response to a first input by the current user to a goal-guided control;

The at least one guidance control includes the target guidance control, and the target guidance control corresponds to a shape of the second projected picture.
The method according to claim 2, wherein the first input comprises at least one input;

The determining a first correction parameter corresponding to the current user in response to the current user's first input to the target guidance control includes:

Counting the number of times the current user inputs the target guidance control and the step value corresponding to each input, the step value includes the input direction and angle;

The step value corresponding to each input is accumulated to obtain the correction direction and the correction angle as the first correction parameter corresponding to the current user.
The method according to claim 2, wherein after determining the first correction parameter corresponding to the current user in response to the first input of the current user to the target guidance control, the method further comprises:

recording the first calibration parameter;

The first correction parameter and the user information of the current user are associated and stored in a target storage area.
The method according to claim 1, wherein said obtaining the first correction parameter corresponding to the current user comprises:

Obtain the user information of the current user;

According to the user information, a first correction parameter corresponding to the current user is acquired from a target storage area.
The method according to claim 1, wherein before displaying the first projected picture, the method further comprises:

Display the second projection screen after automatic keystone correction;

determining the shape of the second projected picture in a case where a correction trigger operation for the second projected picture is detected;

According to the corresponding relationship between the non-preset shape and the guidance information, determine the target guidance control corresponding to the shape of the second projection picture, and the guidance information is used to adjust the projection picture of the non-preset shape to the preset shape the projection screen;

Displaying a second adjustment interface, the second adjustment interface includes the target guidance control and the second projected image;

A first correction parameter corresponding to the current user is determined in response to a second input by the current user to the goal-directed control.
The method according to any one of claims 1-6, wherein said optimizing the angle parameter obtained based on the three-dimensional reconstruction according to the first correction parameter comprises:

The first correction parameter and the angle parameter are superimposed to obtain an optimized angle parameter.
A correction device, characterized in that it is set on a projection device, and the device includes a display module, an acquisition module, an optimization module and a correction module;

The display module is used to display the first projected picture;

The obtaining module is configured to obtain the first correction parameter corresponding to the current user when a trigger operation for the automatic keystone correction function is detected;

The optimization module is configured to optimize an angle parameter obtained based on three-dimensional reconstruction according to the first correction parameter, where the angle parameter is an angle parameter of the projection device relative to a carrier carrying the projection picture;

The correction module is configured to perform automatic keystone correction on the first projection picture according to the optimized angle parameters.
A projection device, characterized in that it includes an automatic projection correction system and a memory; the automatic projection correction system includes a camera module, a projection light engine and a processor;

The projection light machine is used to project projection images;

The camera module is used to capture the projection screen;

memory for storing computer program instructions;

When the computer program instructions are executed by the processor, the method according to any one of claims 1-7 is realized.
A computer-readable storage medium on which computer program instructions are stored, wherein when the computer program instructions are executed by a processor, the method according to any one of claims 1-7 is implemented.