CN103135805B - A kind of switched system of project near point control and Long-distance Control and method - Google Patents

Abstract

The present invention provides a switching system and method for projection near-point control and remote control, which contains two switching technologies: wireless signal method and light spot shape method. When the host computer receives the wireless signal from the wireless transmitting device, it will automatically switch its working mode to the remote control mode; the light point shape law obtains the light point image information from the laser pointer or touch pen through an image acquisition device , and transmit this information to the upper computer, the upper computer judges whether the light point image comes from a laser pointer or a touch pen, and the upper computer switches to the corresponding working mode according to the judged result. The system and method realize automatic switching between near-point control and remote control of projection by using the above two technical methods. The present invention has simple design, low cost, can be applied to various scenes, and is easy to use.

Description

A switching system and method for projection near-point control and remote control

technical field

The invention relates to the field of projection imaging, in particular to a switching system and method for near-point control and remote control of projection.

Background technique

In traditional projectors, projection can only be simply used as a display device, and some interactive functions can be demonstrated through electronic whiteboards and some laser pointers with simple functions, for example, the light spots of visible light laser pointers can be used on the projection screen as Tips, this is very common in PPT presentations, the page turning of the PPT can be realized through the mouse page turning function button on the laser pointer, and the functions of drawing on the screen can be realized through the electronic whiteboard. This traditional projector only has very basic interactive functions. For example, the patent application number is: 201120302737.0, and the name is: projection teaching blackboard, which is a traditional projection interaction device realized by a touch panel and a touch pen.

The new generation of projection has interactive functions to realize near-point control and remote control. Near-point control realizes the touch function on the projection screen through an invisible infrared touch pen. Remote control is to realize the function of simulating a mouse through a laser pointer. . In the patent application number: 201110117009.7, the name is: Projector monitoring system and method, a near-point touch control technology is realized, and the coordinates are obtained by sending control signals to the projector and calculating the shape of the captured image to realize single-click and double-click Interactive operation; in the patent application number: 201110140977.X, the name is: in a kind of interactive control method and device based on laser pointer, a laser pointer interactive control technology is realized, and the laser point image is obtained by shooting the laser pointer spot through the camera, and then Translated into computer instructions; in the patent application number: 201120564916.1, the name is: in the laser pen writing device, the wireless signal is sent to the signal receiver through the laser pen, and the computer recognizes it as a writing or remote control signal.

However, in the new generation of interactive projection, for example, the above four patents all use various technologies to achieve near-point or remote control operations. Near-point control and remote control are two different interaction methods. Near-point control is similar to the The projection screen is a touch screen, and the touch operation can be realized on the projection screen through the stylus, and the remote control is to simulate the mouse operation through the laser pointer and the left and right buttons on the laser pointer. These two methods cannot be used at the same time, and a technology is required. Automatic switching mode can be realized. In the existing technologies, most of them can only realize one mode of working status, either realize near-point control or remote control, and cannot freely switch between the two modes, which limits the interactive application in projection.

In view of this, the prior art needs to be improved and improved.

Contents of the invention

In view of the deficiencies in the prior art, the purpose of the present invention is to provide a system and method for switching between near-point control and remote control of projection. The system and method realize automatic near-point control and remote control by using wireless signal technology and spot image processing technology. Controlling the switch between the two modes increases the interactivity of the interactive projection.

Technical scheme of the present invention is as follows:

A switching system for projection near-point control and remote control, which includes a projector, a projection screen, a host computer, a wireless receiving device, a touch pen, a laser pointer and an image receiving device;

The projector is used to project an image on the projection screen to form a visible image;

The switching method of the near-point control and remote control of the projection includes a wireless signal method and a spot shape method;

When the switching technique is selected as the wireless signal method, the wireless receiving device is used to receive the wireless signal from the wireless transmitting device built in the laser pointer, and send this wireless signal to the upper computer connected to it; The upper computer automatically switches its working mode to near-point control or remote control mode according to the information it receives from the wireless receiving device;

When the switching technique is selected as the spot shape method, the image acquisition device is used to receive the spot image information from the laser pointer and the touch pen in real time, and transmit this information to the host computer connected thereto ; After the host computer analyzes and processes the light point image information it receives, it automatically switches its working mode to near-point control mode or remote control mode according to the analysis result.

The switching system for projection near-point control and remote control, wherein, when the laser pointer is on, the wireless transmitting device sends out a wireless signal according to a certain frequency, and the wireless receiving device receives the wireless signal, and The wireless signal is transmitted to the upper computer, and after the upper computer obtains the information of the wireless signal, it automatically switches its working mode to the remote control mode; when the laser pointer is turned off, the upper computer switches the working mode to the near-point control mode .

The switching system for near-point control and remote control of the projection, wherein the image acquisition device is used to acquire the light point image information emitted by the laser pointer or the touch pen, and upload the light point image information to the upper computer, and the upper computer The image processing device in the image processing device analyzes and processes it, and judges whether the image of the light spot comes from a laser pointer or a point touch pen. If the judgment result is that it comes from a laser pointer, its working mode will be automatically switched to remote control mode, otherwise it will be Its working module is switched to near-point control mode.

The switching system for near-point control and remote control of the projection, wherein the laser pointer includes a laser light emitter, a wireless transmitting device, a power management module and a battery, and the laser light emitter, wireless transmitting device and power management module are in the insulator shell Modules and batteries are connected sequentially.

The switching system for near-point control and remote control of the projection, wherein the touch pen includes an infrared light emitter, an infrared light switch and a built-in battery, the infrared light switch is used to control the infrared light emitter, the infrared light emitter The light emitter, the infrared light switch and the built-in battery are connected in sequence.

The switching system for near-point control and remote control of the projection, wherein the image acquisition device is an infrared camera equipped with an infrared filter.

A method for switching between projection near-point control and remote control, wherein the method includes a wireless signal method and a light spot shape method, and when using the wireless signal method, it includes the following steps:

A1, the projector is used to project the image on the projection screen to form a visible image;

B1. The wireless receiving device connected to the upper computer is used to receive the wireless signal from the wireless transmitter built in the laser pointer, and send this signal to the upper computer;

C1. If the host computer receives the wireless signal information from the wireless receiving device, it automatically switches its working mode to the remote control mode, otherwise it switches its working mode to the short-range control mode;

D1. When the working mode of the upper computer is near-point control, the projector displays the content projected on the projection screen according to the operation instructions issued by the touch pen; when the working mode of the upper computer is remote control, the projector will The operation instructions issued by the laser pointer display the content projected on the projection screen;

When using the spot shape method, the following steps are involved:

A2, the projector is used to project the image on the projection screen to form a visible image;

B2. The image acquisition device receives the light point image information from the laser pen and the touch pen in real time, and transmits this information to the upper computer connected to it;

C2. The host computer analyzes and processes the light point image information it receives, and automatically switches its working mode to near-point control mode or remote control mode according to the analysis result.

D2. When the working mode of the upper computer is near-point control, the projector will display the content projected on the projection screen according to the operation instructions issued by the touch pen; when the working mode of the upper computer is remote control, the projector will The operation instruction issued by the laser pointer displays the content projected on the projection screen.

The method for switching between near-point control and remote control of the projection, wherein, in the above step B1, when the laser pointer is turned on, the wireless transmitting device in the laser pointer transmits a wireless signal at a certain frequency; if the laser pointer is turned off, The wireless transmitting device in the laser pointer stops transmitting wireless signals, and the host computer automatically switches its working mode to the proximity control mode if it cannot receive the wireless signal information from the wireless receiving device.

The method for switching between near-point control and remote control of the projection, wherein, in the above step B2, the light spot image information is the shape information of the light spot emitted by the laser pen and the touch pen.

The method for switching between near-point control and remote control of projection, wherein the image acquisition device is an infrared camera equipped with an infrared filter.

Beneficial effects: a switching system for projection near-point control and remote control of the present invention realizes interactive projection by using two different technologies and can support two interactive modes at the same time: near-point control and remote control, and the projection system is added In addition to being interactive with users, the present invention is simple in design and easy to implement, and can be applied to various scenarios, thereby providing convenience for users.

Description of drawings

FIG. 1 is a schematic structural diagram of a switching system for near-point control and remote control of projection according to the present invention.

Fig. 2 is a schematic diagram of a best application embodiment of a switching system for near-point control and remote control of projection according to the present invention.

Fig. 3a is a method flowchart of the wireless signal method in the method for switching between near-point control and remote control of projection according to the present invention.

Fig. 3b is a flow chart of the light spot shape method in the method for switching between near-point control and remote control of projection according to the present invention.

detailed description

In order to make the object, technical solution and advantages of the present invention more clear and definite, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

As shown in Figure 1, it is a schematic structural diagram of a switching system for projection near-point control and remote control provided by the present invention, and the system includes the following modules:

A switching system for projection near-point control and remote control, which includes a projector 200, a projection screen 400, a host computer 100, a wireless receiving device 500, a touch pen 700, a laser pointer 600 and an image receiving means 610;

The projector 200 is used to project an image on the projection screen 400 to form a visible image;

In the present invention, the method for switching between near-point control and remote control of projection includes two methods: wireless signal method and light spot shape method.

When the switching technique is selected as the wireless signal method, the wireless signal received from the wireless transmitting device 610 built in the laser pointer 600 is sent by the wireless receiving device 500, and this signal is sent to the upper computer 100 connected thereto; The host computer 100 automatically switches its working mode to the near-point control or remote control mode according to the information it receives from the wireless receiving device 500 .

When the switching technique is selected as the light point shape method, the image acquisition device is used to receive the light point image information from the laser pointer 600 and the point touch pen 700 in real time, and transmit this information to the connected Host computer 100; after the host computer 100 analyzes and processes the light point image information it receives, it automatically switches its working mode to near-point control mode or remote control mode according to the analysis result.

Specifically, when the wireless signal method is used in a specific application, when the laser pointer is turned on, the wireless transmitting device sends out a wireless signal according to a certain frequency, and the wireless receiving device receives the wireless signal in real time, and sends This wireless signal is transmitted to the upper computer, and after the upper computer obtains the information of this wireless signal, the default user wants to use the laser pointer to remotely control the projector at this time, and then automatically switch its working mode to remote control mode;

If the laser pointer is in the off state, the wireless transmitting device installed inside it stops sending wireless signals, and the wireless receiving device cannot receive the wireless signal from the inside of the laser pointer, then the upper computer cannot receive the wireless signal sent by the wireless transmitting device, then It switches the working mode to the near-point control mode, that is, the near-point control mode of the stylus.

If the light spot shape method is used in the above system to switch between projection near-point control and remote control, the image acquisition device is used to acquire the light spot image sent by the laser pen or touch pen, and the acquired light spot image information Upload to the host computer, the image processing device in the host computer analyzes and processes it, and judges that the image of the light spot comes from a laser pen or a touch pen through the shape of the light spot, if the result of the judgment is that it comes from The laser pointer automatically switches its working mode to the remote control mode, or switches its working module to the near-point control mode.

Preferably, the laser pointer includes a laser emitter, a wireless transmitter, a power management module and a battery, and the laser emitter, the wireless transmitter, the power management module and the battery are sequentially connected in the insulator casing.

Wherein, the touch pen includes an infrared light emitter, an infrared light switch and a built-in battery, the infrared light switch is used to control the infrared light emitter, and the infrared light emitter, the infrared light switch and the built-in battery are sequentially connected.

Fig. 2 is a schematic diagram of a best application embodiment of a switching system for near-point control and remote control of projection provided by the present invention. As shown in FIG. 2, in the implementation of the system of the present invention, if the wireless signal method is selected to switch between projection near-point control and remote control, then specifically, the projector 30 is first used to project information onto the projection screen 40, so The laser pointer 60 includes a wireless transmitting device. When the laser pointer is turned on, the wireless transmitting device arranged inside it sends out a wireless signal according to a certain frequency. The wireless receiving device 50 is used to receive the wireless signal from the wireless transmitting device, and transmit the wireless signal information to the upper computer 10, and after the upper computer 10 obtains the wireless signal, it automatically switches its working mode to remote control mode. If the laser pointer is in the off state, the wireless transmitting device disposed therein stops transmitting wireless signals, and the host computer 10 will automatically switch its working mode to the proximity control mode if it cannot receive the wireless signal information. The projector 30 displays the projected content according to the working mode of the host computer 10 .

If you choose to use the light spot shape method, then use an infrared camera 20 that is provided with an infrared filter on the camera as the image acquisition device, and use this infrared camera 20 to obtain the spot image from the laser pointer 60 and the touch pen 70 to send, And send the spot image information that it obtains to the host computer 10 that is connected with it, this host computer contains image processing function, analyzes and processes the spot image information that it obtains, judges that this spot image comes from laser pointer or Touch the stylus.

In a specific embodiment, by modifying the light exit hole of the tip of the laser pointer 60, the light spot shot by the laser pointer 60 has a special shape, such as a square, hollow, triangle, or changing the light point of the touch pen 70. The size of the light spot on the screen made by the stylus 70 is larger than that of the laser pointer 60 . The camera head of the infrared camera 20 is equipped with an infrared filter, captures images containing light spots, and transmits them to the host computer 10. The host computer 10 judges whether the current work is a touch pen or a laser pointer by identifying the size or shape of the light spots, thereby To switch working mode.

The present invention provides a switching system for projection near-point control and remote control, which contains two switching technologies: wireless signal method and light spot shape method. The wireless signal receiving device connected to the host computer receives the wireless signal from the wireless transmitting device and transmits it to the host computer, then the host computer switches its working mode to the remote control mode; the light spot shape law passes a The image acquisition device acquires the light point image information from the laser pointer or touch pen, and transmits this information to the upper computer. The upper computer judges that the light point image comes from the laser pointer or touch pen, and the upper computer judges Switch to the corresponding working mode according to the output result. The system realizes automatic switching between near-point control and remote control of projection by using the above two technical methods. The present invention is simple in design, low in cost, can be applied to various scenes, and is easy to use, and the present invention realizes that interactive projection can be simultaneously Supports two interactive modes: near-point control and remote control, enriching the interactive methods of interactive projection.

The invention also provides a method for switching between near-point control and remote control of the projection, which includes two technical methods: the wireless signal method and the light spot shape method.

As shown in Figure 3a, the following steps are involved when using the wireless signal method:

A1. The projector is used to project an image on the projection screen to form a visible image.

The projector projects images on the projection screen, and the projector is connected with and controlled by an upper computer.

B1. The wireless receiving device connected to the upper computer is used to receive the wireless signal from the wireless transmitter built in the laser pointer, and send the signal to the upper computer.

When the laser pointer is turned on, its internal wireless transmitting device emits a wireless signal according to a certain frequency, and the wireless receiving device receives the wireless signal and sends the signal information to the host computer.

C1. If the upper computer receives the wireless signal information from the wireless receiving device, it automatically switches its working mode to the remote control mode, otherwise it switches its working mode to the short-range control mode.

The upper computer receives the wireless signal information from the laser pointer, judges that the source of the laser pointer is turned on, and then determines that the user is using the laser pointer as a projection tool, and the upper computer automatically switches its working mode to remote control mode, that is, laser Pen working mode.

If the laser pointer is turned off in the above step B1, the host computer cannot obtain the wireless signal, and it determines that the user has not turned on the laser pointer, and when using the touch pen to perform corresponding projection operations, it will automatically switch its working mode to near-point control mode, that is, the working mode of the stylus.

D1. When the working mode of the upper computer is near-point control, the projector displays the content projected on the projection screen according to the operation instructions issued by the touch pen; when the working mode of the upper computer is remote control, the projector The content projected on the projection screen is displayed according to the operation instructions issued by the laser pointer.

As shown in Figure 3b, when using the spot shape method, the following method steps are included:

A2. The projector is used to project images on the projection screen to form visible images.

B2. The image acquisition device receives the light point image information from the laser pen and the touch pen in real time, and transmits this information to the upper computer connected thereto.

The image acquisition device receives in real time the light spot image information from the laser pen and the touch pen, and the light spot image information is the shape information of the light spot emitted by the laser pen and the touch pen.

Before using this method, it is first necessary to modify the light exit hole of the tip of the laser pointer or the tip of the touch pen, so that the light spot emitted by the laser pointer or the touch pen has a special shape, or change the shape of the light head of the laser pointer or the touch pen. The size of the light spot on the screen made by the touch pen is larger than that of the laser pointer, so that there is a big difference in the image information of the light spot emitted by the laser pen and the touch pen, making it easier to use the image processing device Identify the light point image information.

C2. The host computer analyzes and processes the light point image information it receives, and automatically switches its working mode to near-point control mode or remote control mode according to the analysis result.

The upper computer analyzes and processes the light point image information it receives according to its size or shape, and judges whether the light point it acquires comes from a laser pointer or a touch pen. If the light point comes from a laser pointer, it automatically Switch its working mode to the remote control mode, if the light point comes from the touch pen, then automatically switch its working mode to the near point control mode.

D2. When the working mode of the upper computer is near-point control, the projector will display the content projected on the projection screen according to the operation instructions issued by the touch pen; when the working mode of the upper computer is remote control, the projector will The operation instruction issued by the laser pointer displays the content projected on the projection screen.

The method for switching between near-point control and remote control of the projection, wherein, in the above step B1, when the laser pointer is turned on, the wireless transmitting device in the laser pointer transmits a wireless signal at a certain frequency; if the laser pointer is turned off, The wireless transmitting device in the laser pointer stops transmitting wireless signals, and the host computer automatically switches its working mode to the proximity control mode if it cannot receive the wireless signal information from the wireless receiving device.

Preferably, in a specific implementation manner, the image acquisition device is an infrared camera with an infrared filter installed on the camera head.

A system and method for switching between near-point control and remote control of projection provided by the present invention is based on computer vision technology and wireless communication technology, and realizes automatic switching between two modes of near-point control and remote control. Compared with the prior art , the present invention can automatically, accurately and quickly switch working modes, the method is simple and easy to implement, and it can be applied not only to interactive projection devices, but also to other similar devices.

It should be understood that the application of the present invention is not limited to the above examples, and those skilled in the art can make improvements or transformations according to the above descriptions, and all these improvements and transformations should belong to the protection scope of the appended claims of the present invention.

Claims (7)

1. A switching system for projection near-point control and remote control, characterized in that it includes a projector, a projection screen, a host computer, a wireless receiving device, a touch pen, a laser pointer and an image receiving device; The projector is used to project an image on the projection screen to form a visible image; The switching method of the near-point control and remote control of the projection includes a wireless signal method and a spot shape method; When the switching method is selected as the wireless signal method, the wireless receiving device is used to receive the wireless signal from the wireless transmitting device built in the laser pointer, and send this wireless signal to the upper computer connected to it; The upper computer automatically switches its working mode to near-point control or remote control mode according to the information it receives from the wireless receiving device; When the switching method is selected as the light spot shape method, the image acquisition device is used to receive in real time the light spot image information sent from the laser pointer and the point touch pen, and transmit this information to the upper computer connected thereto; After the above-mentioned host computer analyzes and processes the light point image information it receives, it automatically switches its working mode to near-point control mode or remote control mode according to the analysis results; The image acquisition device is used to obtain the image information of the light point emitted by the laser pen or the touch pen, and upload the image information of the light point to the upper computer, and the image processing device in the upper computer analyzes and processes it, and judges that the light The image of the point comes from a laser pointer or a touch pen. If the judgment result is from a laser pointer, its working mode will be automatically switched to remote control mode, otherwise its working module will be switched to near-point control mode; The image acquisition device is an infrared camera provided with an infrared filter, and the infrared filter is used to capture images containing light spots and transmit them to the upper computer, and the upper computer recognizes the size of the light spots or Shape to determine whether the current working is a touch pen or a laser pointer, so as to switch the working mode. 2. The switching system for near-point control and remote control of projection according to claim 1, characterized in that, when the laser pointer is in the open state, the wireless transmitting device sends a wireless signal according to a certain frequency, and the wireless receiving device Receive the wireless signal, and transmit this wireless signal to the host computer, after the host computer obtains the information of the wireless signal, it will automatically switch its working mode to the remote control mode; when the laser pointer is off, the host computer will The working mode is switched to near-point control mode. 3. According to the switching system of projection near-point control and remote control described in claim 1 or 2, it is characterized in that, said laser pointer comprises a laser light emitter, a wireless transmitting device and power management module and battery, in the insulator casing The middle laser emitter, the wireless transmitting device, the power management module and the battery are connected in sequence. 4. The switching system of projection near-point control and remote control according to claim 1 is characterized in that, the point touch pen includes an infrared light emitter, an infrared light switch and a built-in battery, and the infrared light switch is used for The infrared light emitter is controlled, and the infrared light emitter, the infrared light switch and the built-in battery are sequentially connected. 5. A method for switching between projection near-point control and remote control, characterized in that the method comprises a wireless signal method and a light spot shape method, and when using the wireless signal method, comprises the following steps: A1. The projector is used to project the image on the projection screen to form a visible image; B1. The wireless receiving device connected to the upper computer is used to receive the wireless signal from the wireless transmitter built in the laser pointer, and send this signal to the upper computer; C1. If the host computer receives the wireless signal information from the wireless receiving device, it automatically switches its working mode to the remote control mode, otherwise it switches its working mode to the short-range control mode; D1. When the working mode of the upper computer is near-point control, the projector displays the content projected on the projection screen according to the operation instructions issued by the touch pen; when the working mode of the upper computer is remote control, the projector will The operation instructions issued by the laser pointer display the content projected on the projection screen; When using the spot shape method, the following steps are involved: A2, the projector is used to project the image on the projection screen to form a visible image; B2. The image acquisition device receives the light point image information from the laser pen and the touch pen in real time, and transmits this information to the upper computer connected to it; C2. The upper computer analyzes and processes the light point image information it receives, and automatically switches its working mode to near-point control mode or remote control mode according to the analysis results; D2. When the working mode of the upper computer is near-point control, the projector will display the content projected on the projection screen according to the operation instructions issued by the touch pen; when the working mode of the upper computer is remote control, the projector will The operation instructions issued by the laser pointer display the content projected on the projection screen; The image acquisition device is an infrared camera provided with an infrared filter, and the infrared filter is used to capture images containing light spots and transmit them to the upper computer, and the upper computer recognizes the size of the light spots or Shape to determine whether the current working is a touch pen or a laser pointer, so as to switch the working mode. 6. The method for switching between near-point control and remote control according to claim 5, characterized in that, in the step B1, when the laser pointer is turned on, the wireless transmitting device in the laser pointer emits a wireless signal at a certain frequency ; If the laser pointer is in the closed state, the wireless transmitting device in the laser pointer stops transmitting wireless signals, and the host computer does not receive the wireless signal information from the wireless receiving device, then automatically switches its working mode to the near-point control mode . 7. The method for switching between near-point control and remote control of projection according to claim 5, characterized in that, in the step B2, the light spot image information is the shape information of the light spot emitted by the laser pen and the touch pen.