阅读说明：本技术 一种基于红外摄像头的电子白板及其使用方法 (Electronic whiteboard based on infrared camera and using method thereof ) 是由 刘远 于 2021-06-08 设计创作，主要内容包括：本申请公开了一种基于红外摄像头的电子白板及其使用方法,该基于红外摄像头的电子白板,包括用于显示信息的投影幕布；用于发出红外光点,并将红外光点显示在投影幕布上的红外书写笔；拍摄范围与投影幕布重合,且能够拍摄红外书写笔发出的红外光点的红外摄像机；用于对红外摄像机采集的红外光点进行处理的白板主机,红外摄像机与白板主机电性相连；投影范围与投影幕布重合,且能够在投影幕布上投影白板主机处理后信息的投影仪,投影仪与白板主机电性相连。本方案,通过红外书写笔发出红外光点,通过红外摄像机采集带有红外光点的画面,并通过白板主机对画面处理,将红外光点的画面通过投影仪显示在投影幕布上,成本和价格更低。(The application discloses an electronic whiteboard based on an infrared camera and a using method thereof, wherein the electronic whiteboard based on the infrared camera comprises a projection curtain for displaying information; the infrared writing pen is used for emitting infrared light spots and displaying the infrared light spots on the projection screen; the shooting range is superposed with the projection screen, and the infrared camera can shoot infrared light spots emitted by the infrared writing pen; the whiteboard host is used for processing the infrared light spots collected by the infrared camera, and the infrared camera is electrically connected with the whiteboard host; projection range and projection curtain coincidence, and can be on the projection curtain projecting white board host computer processes the projecting apparatus of back information, projecting apparatus and white board host computer electrical property link to each other. According to the scheme, the infrared writing pen emits infrared light spots, the infrared camera collects pictures with the infrared light spots, the white board host processes the pictures, the pictures with the infrared light spots are displayed on the projection curtain through the projector, and the cost and the price are lower.)

1. The utility model provides an electronic whiteboard based on infrared camera which characterized in that includes:

a projection curtain (100) for displaying information;

an infrared writing pen (200) for emitting an infrared light spot and displaying the infrared light spot on the projection screen (100);

the shooting range is overlapped with the projection curtain (100), and the infrared camera (300) can shoot the infrared light spot emitted by the infrared writing pen (200);

the whiteboard host (400) is used for processing the infrared light spots collected by the infrared camera (300), and the infrared camera (300) is electrically connected with the whiteboard host (400);

projection range with projection curtain (100) coincidence, and can project on projection curtain (100) projecting apparatus (500) of whiteboard host computer (400) processing back information, projecting apparatus (500) with whiteboard host computer (400) electric connection.

2. The infrared camera-based electronic whiteboard of claim 1, wherein the infrared writing pen (200) comprises a housing (210), a button switch (220), a battery (230), and an infrared LED lamp (240), wherein the battery (230) is installed inside the housing (210), the button switch (220) is installed at a side portion of the housing (210), the infrared LED lamp (240) is installed at a side portion of the housing (210), and the infrared LED lamp (240) is electrically connected to the battery (230) through the button switch (220).

3. The electronic whiteboard based on the infrared camera as claimed in claim 2, wherein an outer extension portion (211) engaged with the infrared LED lamp (240) is disposed at a side portion of the housing (210), a flexible sleeve (212) is wrapped at an outer side of the housing (210), and a through hole (213) engaged with the button switch (220) is formed at a side portion of the housing (210).

4. The infrared camera-based electronic whiteboard of claim 1, further comprising a supporting frame (600), wherein a winder (610) is connected to a lower portion of the supporting frame (600), and the winder (610) is connected to an upper portion of the projection curtain (100).

5. An infrared camera-based electronic whiteboard according to claim 4, further comprising a connecting frame (700) and two three-axis adjusting brackets (710), wherein the connecting frame (700) is installed at an upper portion of the supporting frame (600), the two three-axis adjusting brackets (710) are respectively installed at side portions of the connecting frame (700), the infrared camera (300) and the projector (500) are respectively installed at output ends of the two three-axis adjusting brackets (710), and the infrared camera (300) is located below the projector (500).

6. The electronic whiteboard based on an infrared camera as claimed in claim 1, wherein the whiteboard host (400) is internally provided with an image processing module for sharpening, denoising and binarizing the original image collected by the infrared camera, an image recognition module for recognizing infrared light and electricity in the original image, a coordinate recognition module for calculating the original coordinates of the infrared light spots, and a coordinate conversion module for calculating the coordinates of the actual operation of the user in the projection image according to the original coordinates of the infrared light spots, wherein the image processing module is connected with the image recognition module by signals, the coordinate recognition module is connected with the image recognition module by signals, and the coordinate conversion module is connected with the coordinate recognition module by signals.

7. The infrared camera-based electronic whiteboard of claim 6, further comprising a rendering module for rendering the coordinate-converted picture, wherein the rendering module is connected with the coordinate recognition module through signals.

8. A use method of an electronic whiteboard based on an infrared camera is characterized by comprising the following steps:

s1, using an infrared writing pen: an operator uses the infrared writing pen to enable an infrared light spot emitted by the infrared writing pen to irradiate the projection screen;

s2, obtaining an original picture: the infrared camera shoots an original picture on the projection curtain and transmits the original picture to the white board host;

s3, original picture processing: the white board host machine processes the original picture and transmits the processed picture to the projector;

s4, projection: and the projector projects the processed picture onto the projection curtain.

9. The method for using an electronic whiteboard based on an infrared camera according to claim 8, wherein in the step S1, the specific steps of using the infrared writing pen include:

s101, holding the shell by hands of an operator;

s102, enabling an operator to enable one end of the infrared LED lamp to face the projection curtain and press a button switch;

and S103, the infrared LED lamp emits light and irradiates the projection curtain.

10. The method for using an electronic whiteboard based on an infrared camera as claimed in claim 8, wherein in S3, the specific step of the original screen processing includes:

s301, receiving an original picture acquired by an infrared camera;

s302, carrying out sharpening, denoising and binarization processing on an original picture;

s303, carrying out image recognition on the processed picture, executing the next step if an infrared light spot is recognized, and returning to execute S301 if the infrared light spot is not recognized;

s304, calculating the original coordinates of the operation of the user in the infrared camera picture according to the identified infrared light points;

s305, calculating the coordinate actually operated by the user in the projection picture according to the obtained original coordinate;

and S306, outputting the coordinates of the actual operation, and rendering the image.

Technical Field

The application relates to the technical field of electronic whiteboards, in particular to an electronic whiteboard based on an infrared camera, and simultaneously, the application also relates to a using method of the electronic whiteboard based on the infrared camera.

Background

The electronic whiteboard is a newer product, it is a high-tech product that has collected many high-tech means such as the electronic technology of the point, software technology and researched and developed, combine computer and projector, can realize paperless official working and teaching, it can write with the pen directly like ordinary whiteboard or teaching blackboard, totally substitute the function of the traditional chalk, but avoid various harms that the chalk produces, has saved the resource, compared with projector, ordinary whiteboard, electronic whiteboard has realized the high-quality, high-efficient teaching mode, therefore is used in meeting room, classroom, exhibition hall, etc. extensively.

The existing electronic whiteboard generally adopts schemes such as a capacitive screen or an infrared touch module, so that user operation is realized, the cost and the technical limit are limited, and the product is generally high in price.

Disclosure of Invention

The application mainly aims to provide an electronic whiteboard based on an infrared camera and a using method thereof, so as to solve the problem that the existing electronic whiteboard is high in cost in the related art.

In order to achieve the above-mentioned objects,

in a first aspect, the present application provides an electronic whiteboard based on an infrared camera and a method for using the same, including: a projection screen for displaying information;

the infrared writing pen is used for emitting infrared light spots and displaying the infrared light spots on the projection screen;

the shooting range is superposed with the projection screen and can shoot an infrared light spot emitted by the infrared writing pen;

the whiteboard host is used for processing the infrared light spots collected by the infrared camera, and the infrared camera is electrically connected with the whiteboard host;

projection range with the projection curtain coincidence, and can the projection is in projection on the projection curtain the projecting apparatus of whiteboard host computer processing back information, the projecting apparatus with whiteboard host computer electrical property links to each other.

In an embodiment of this application, infrared writing pen includes casing, button switch, battery and infrared LED lamp, the battery install in the inside of casing, button switch install in the lateral part of casing, infrared LED lamp pass through button switch with the battery electrical property links to each other.

In an embodiment of this application, the lateral part of casing be provided with infrared LED lamp complex extension, the outside parcel of casing has the flexible cover, the lateral part of casing seted up with button switch cooperation through-hole.

In an embodiment of this application, still include braced frame, braced frame's sub-unit connection has the rolling ware, the rolling ware with the upper portion of projection curtain links to each other.

In an embodiment of this application, still include link and two triaxial and adjust the support, the link install in braced frame's upper portion, two triaxial adjust the support install respectively in the lateral part of link, infrared camera with the projector install respectively in two the output of triaxial adjustment support, infrared camera is in the below of projector.

In an embodiment of the application, the whiteboard host computer is internally provided with an image processing module for sharpening, denoising and binaryzation processing of an original picture collected by the infrared camera, an image identification module for identifying infrared light and electricity in the original picture, a coordinate identification module for calculating an original coordinate of an infrared light spot, and a coordinate conversion module for calculating a coordinate of actual operation of a user in a projection picture according to the original coordinate of the infrared light spot, wherein the image processing module is connected with the image identification module through a signal, the coordinate identification module is connected with the image identification module through a signal, and the coordinate conversion module is connected with the coordinate identification module through a signal.

In an embodiment of the application, the system further comprises a rendering module for rendering the picture after the coordinates are converted, and the rendering module is connected with the coordinate identification module through signals.

In a second aspect, the present application further provides a method for using an electronic whiteboard based on an infrared camera, which specifically includes the following steps:

s1, using an infrared writing pen: an operator uses the infrared writing pen to enable an infrared light spot emitted by the infrared writing pen to irradiate the projection screen;

s2, obtaining an original picture: the infrared camera shoots an original picture on the projection curtain and transmits the original picture to the white board host;

s3, original picture processing: the white board host machine processes the original picture and transmits the processed picture to the projector;

s4, projection: and the projector projects the processed picture onto the projection curtain.

In an embodiment of the present application, in S1, the infrared writing pen is used in the following steps:

s101, holding the shell by hands of an operator;

s102, enabling an operator to enable one end of the infrared LED lamp to face the projection curtain and press a button switch;

and S103, the infrared LED lamp emits light and irradiates the projection curtain.

In an embodiment of the present application, in S3, the step of processing the original picture includes:

s301, receiving an original picture acquired by an infrared camera;

s302, carrying out sharpening, denoising and binarization processing on an original picture;

s303, carrying out image recognition on the processed picture, executing the next step if an infrared light spot is recognized, and returning to execute S301 if the infrared light spot is not recognized;

s304, calculating the original coordinates of the operation of the user in the infrared camera picture according to the identified infrared light points;

s305, calculating the coordinate actually operated by the user in the projection picture according to the obtained original coordinate;

and S306, outputting the coordinates of the actual operation, and rendering the image.

Compared with the prior art, the beneficial effects of this application are:

1. according to the electronic whiteboard based on the infrared camera, the infrared writing pen emits the infrared light spot, the infrared camera collects the picture with the infrared light spot, the whiteboard host processes the picture, and the picture with the infrared light spot is displayed on the projection screen through the projector, so that compared with the existing capacitive screen or infrared touch module, the cost and the price are lower;

2. according to the electronic whiteboard based on the infrared camera, a common computer and a projector can be transformed into the electronic whiteboard of the application only by adding a small amount of equipment and installing supporting software in the scheme, so that the cost is further reduced;

3. this whiteboard based on infrared camera, whiteboard host computer can effectual realization be convenient for subsequent projection to the processing of picture, reaches good result of use.

Drawings

Fig. 1 is a schematic structural diagram of an infrared camera based electronic whiteboard according to embodiment 1 of the present application;

fig. 2 is a schematic structural diagram of an infrared writing pen of an electronic whiteboard based on an infrared camera according to embodiment 1 of the present application;

fig. 3 is an enlarged schematic view a in fig. 2 of an infrared camera based electronic whiteboard provided in embodiment 1 of the present application;

fig. 4 is a schematic block diagram of a whiteboard host built-in module of an electronic whiteboard based on an infrared camera according to embodiment 1 of the present application;

fig. 5 is a schematic block diagram of a flow of a method for using an electronic whiteboard based on an infrared camera according to embodiment 1 of the present application;

fig. 6 is a schematic structural diagram of an electronic whiteboard based on an infrared camera according to embodiment 2 of the present application.

In the figure: 100. a projection screen; 200. an infrared writing pen; 210. a housing; 211. an extension portion; 212. a flexible sleeve; 213. a through hole; 220. a push button switch; 230. a battery; 240. an infrared LED lamp; 300. an infrared camera; 400. a whiteboard host; 500. a projector; 600. a support frame; 610. a winder; 700. a connecting frame; 710. three-axis adjusting bracket.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.

In addition, the term "plurality" shall mean two as well as more than two.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

Example 1

Referring to fig. 1-5, the present application provides an electronic whiteboard based on an infrared camera, including a projection curtain 100 for displaying information;

an infrared writing pen 200 for emitting an infrared light spot and displaying the infrared light spot on the projection screen 100;

an infrared camera 300 which has a shooting range coinciding with the projection screen 100 and can shoot an infrared light spot emitted by the infrared writing pen 200;

the whiteboard host 400 is used for processing the infrared light spots collected by the infrared camera 300, and the infrared camera 300 is electrically connected with the whiteboard host 400;

the projection range coincides with the projection curtain 100, and the projector 500 capable of projecting the information processed by the whiteboard host 400 on the projection curtain 100, the projector 500 is electrically connected with the whiteboard host 400.

It should be noted that the difference between the infrared camera 300 and the ordinary camera is that the light sensing range of the infrared camera 300 is infrared, and the light sensing range is within a certain band range, in this embodiment, the light sensing range of the infrared camera 300 is selected to be 800nm-1100 nm;

the infrared LED lamp is a near-infrared light emitting device which converts electric energy into light energy, has a series of advantages of small size, low power consumption, good directivity and the like, and is widely applied to systems such as remote control, remote measurement, optical isolation, optical switching, photoelectric control, target tracking and the like. The infrared light emitting diode is made of a material (commonly used gallium arsenide GaAs) with high infrared radiation efficiency into a PN junction, and current is injected into the PN junction by adding forward bias to excite infrared light. The spectral power distribution is the central wavelength 830n-950nm, the half-peak bandwidth is about 40nm, and the infrared camera 300 can be well adapted to the spectral power distribution.

Referring to fig. 1, 2 and 3, the infrared writing pen 200 includes a housing 210, a button switch 220, a battery 230 and an infrared LED lamp 240, the battery 230 is installed inside the housing 210 through a battery holder, the button switch 220 is installed on a side portion of the housing 210, the infrared LED lamp 240 is installed on the side portion of the housing 210 through a threaded connection manner, the infrared LED lamp 240 is electrically connected to the battery 230 through the button switch 220, in particular, an outer extension portion 211 matched with the infrared LED lamp 240 is disposed on the side portion of the housing 210, a flexible sleeve 212 is wrapped on an outer side of the housing 210, the flexible sleeve 212 is a silica gel sleeve and a rubber sleeve with rough surfaces, and in order to facilitate installation of the button switch 220, a through hole 213 matched with the button switch 220 is formed on the side portion of the housing 210.

It should be noted that, the housing 210 is a plastic housing, the battery 230 can be a disposable battery or a rechargeable battery, and when a disposable battery is selected, a cover matched with the battery 230 is installed at the side of the housing 210, so that the battery 230 can be replaced conveniently; when a rechargeable battery is used, a charging interface is installed at a side of the housing 210 to charge the battery 230.

Referring to fig. 4, an image processing module for sharpening, denoising and binarizing an original image collected by an infrared camera, an image recognition module for recognizing infrared light and electricity in the original image, a coordinate recognition module for calculating an original coordinate of an infrared light spot, and a coordinate conversion module for calculating a coordinate of an actual operation of a user in a projection image according to the original coordinate of the infrared light spot are built in a whiteboard host 400, the image processing module is in signal connection with the image recognition module, the coordinate recognition module is in signal connection with the image recognition module, the coordinate conversion module is in signal connection with the coordinate recognition module, and when the coordinate conversion module is specifically set, the whiteboard host further comprises a rendering module for rendering the image after coordinate conversion, and the rendering module is in signal connection with the coordinate recognition module.

Whiteboard host 400 is configured as a computer host, and a program for processing an image is installed in the computer host.

Referring to fig. 5, the present application further provides a method for using an electronic whiteboard based on an infrared camera, which specifically includes the following steps:

s1, using the infrared writing pen 200: an operator uses the infrared writing pen 200 to enable an infrared light spot emitted by the infrared writing pen 200 to irradiate on the projection curtain;

s2, obtaining an original picture: the infrared camera 300 captures an original picture on the projection curtain 100 and transmits the original picture to the whiteboard host 400;

s3, original picture processing: the whiteboard host 400 processes the original picture and transmits the processed picture to the projector 500;

s4, projection: the projector 500 projects the processed picture onto the projection screen 100.

In the present embodiment, S101, the operator holds the housing 210 with his hand;

s102, an operator enables one end of the infrared LED lamp to face the projection curtain and presses the button switch 220;

s103, the infrared LED lamp 240 emits light and irradiates the projection curtain 100.

In this embodiment, in S3, the specific steps of the original picture processing include:

s301, receiving an original picture acquired by the infrared camera 300;

s302, carrying out sharpening, denoising and binarization processing on an original picture;

s303, carrying out image recognition on the processed picture, executing the next step if an infrared light spot is recognized, and returning to execute S301 if the infrared light spot is not recognized;

s304, calculating the original coordinates of the operation of the user in the picture of the infrared camera 300 according to the identified infrared light points;

s305, calculating the coordinate actually operated by the user in the projection picture according to the obtained original coordinate;

and S306, outputting the coordinates of the actual operation, and rendering the image.

It should be noted that in S304, it is necessary to establish a coordinate system with the detection center of the infrared camera 300, and then obtain the original coordinates of the infrared light spot according to the established coordinate system.

Example 2

Referring to fig. 6, different from embodiment 1, the electronic whiteboard based on an infrared camera further includes a supporting frame 600, in order to facilitate retraction and extension of the projection screen 100, a lower portion of the supporting frame 600 is connected with a winding device 610 through a bolt, the winding device 610 is connected with an upper portion of the projection screen 100, and during specific setting, the electronic whiteboard further includes a connecting frame 700 and two three-axis adjusting brackets 710, the connecting frame 700 is mounted on the upper portion of the supporting frame 600 through a bolt, the two three-axis adjusting brackets 710 are respectively mounted on lateral portions of the connecting frame 700 through bolts, the infrared camera 300 and the projector 500 are respectively mounted at output ends of the two three-axis adjusting brackets 710, and the infrared camera 300 is located below the projector 500.

It should be noted that, in this embodiment, the winding device 610 is composed of a forward and reverse rotation motor and a winding roller, the projection curtain 100 is connected to the lower portion of the winding roller, and the winding roller is driven to rotate by the operation of the forward and reverse rotation motor, so as to wind the projection curtain 100;

in this embodiment, the three-axis adjusting bracket 710 can realize three-axis movement of the infrared camera 300 and the projector 500, so as to adjust the positions of the infrared camera 300 and the projector 500, so that the shooting range of the infrared camera 300 coincides with the projection screen 100, and the projection range of the projector 500 coincides with the projection screen 100.

It should be noted that the connection frame 700 may be installed on the ceiling of the teacher.

In summary, the following steps: send infrared light spot through infrared writing pen 200, gather the picture that has infrared light spot through infrared camera 300 to through whiteboard host 400 to the picture is handled, show the picture of infrared light spot on projection curtain 100 through projecting apparatus 500, compare in current capacitive screen or infrared touch module, cost and price are lower.

It should be noted that: the model specifications of the button switch 220, the battery 230, the infrared LED lamp 240, the infrared camera 300, the whiteboard host 400, the projector 500, the winder 610 and the three-axis adjusting bracket 710 need to be determined by type selection according to the actual specification of the device, and the specific type selection calculation method adopts the prior art in the field, so detailed description is omitted.

The power supply and the principle of the infrared camera 300, the whiteboard host 400, the projector 500, the retractor 610 and the three-axis adjusting bracket 710 will be clear to those skilled in the art and will not be described in detail herein.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.