CN115082591A - Non-contact drawing board projection equipment and use method - Google Patents
Non-contact drawing board projection equipment and use method Download PDFInfo
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- CN115082591A CN115082591A CN202210786545.4A CN202210786545A CN115082591A CN 115082591 A CN115082591 A CN 115082591A CN 202210786545 A CN202210786545 A CN 202210786545A CN 115082591 A CN115082591 A CN 115082591A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T11/00—2D [Two Dimensional] image generation
- G06T11/20—Drawing from basic elements, e.g. lines or circles
- G06T11/203—Drawing of straight lines or curves
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
- G06F3/1407—General aspects irrespective of display type, e.g. determination of decimal point position, display with fixed or driving decimal point, suppression of non-significant zeros
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B5/00—Electrically-operated educational appliances
- G09B5/02—Electrically-operated educational appliances with visual presentation of the material to be studied, e.g. using film strip
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Abstract
A contactless drawing board projection equipment and its application method, the computer host contains the bluetooth receiver, image processor, power; the Bluetooth receiver is used for receiving the laser color number transmitted by the multicolor laser pen; the image processor is used for calculating the moving track of the laser beam at the drop point of the projection screen, translating the moving track of the laser beam into a track image and displaying the track image on the projection screen through the projection lens; the camera is embedded in the computer host; the multi-color laser pen emits laser beams to be focused on the curtain; and the Bluetooth transmitter is used for transmitting the color data selected by the multicolor laser pen to the image processor. Contactless drawing board projection equipment mainly is applied to office meeting scene and teaching scene, can be under the condition of contactless curtain, draws on the curtain with the laser pen, and the user has bigger home range, blocks the microorganism propagation between user and the curtain simultaneously.
Description
Technical Field
The invention relates to the field of real-time projection, in particular to a multicolor laser pen 4 and projection equipment.
Background
The prior drawing board projection equipment is mainly applied to office meeting scenes and teaching scenes, a screen needs to be contacted for drawing on the screen, and a user does not have a large moving range and cannot block the propagation of microorganisms between the user and the screen.
Disclosure of Invention
In order to solve the above-mentioned problems of the prior art, the present invention provides a multicolor laser pen 4 and a projection apparatus.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a contactless palette projection device comprising:
the computer host 1, the computer host 1 includes bluetooth receiver, image processor, power; the Bluetooth receiver is used for receiving the laser color number transmitted by the multicolor laser pen 4; the image processor is used for calculating the moving track of the laser beam at the drop point of the projection screen 11, translating the moving track of the laser beam into a track image, and displaying the track image on the projection screen 11 through the projection lens 3, wherein the power supply mode of the computer host 1 can adopt a storage battery power supply mode or a transformer power supply mode;
a camera 2; the camera 2 is embedded in the computer host 1 and is used for collecting a moving track picture of a laser beam at a drop point of the projection curtain 11;
a projection lens 3; the projection lens 3 is embedded in the computer host 1 and is used for projecting the track image translated by the image processor to the projection curtain 11;
a multi-color laser pen 4; the curtain is used for emitting laser beams, lighting on the curtain and supplying power to the button cell in a power supply mode;
a Bluetooth transmitter 9 for transmitting the color data selected by the multi-color laser pen 4 to the image processor;
the laser pen power supply switch 10 is used for controlling the switch for supplying power to the multicolor laser pen 4;
the projection curtain 11, the projection curtain 11 is the frosting, reduces the mirror reflection, can make the camera 2 catch the movement track of the apparent polychrome laser pen 4 salient point.
A using method of a contactless drawing board projection device comprises the following steps:
the first step is as follows: installing a projection equipment main body (a computer host 1, a camera 2 and a projection lens 3) on a wall surface, unfolding a pure white projection curtain 11 on the wall surface right below the projection equipment main body, switching on a power switch of the projection equipment, starting working of the camera 2 and the projection lens 3 after switching on the power, and completely coinciding a projection range of the projection lens 3 with a picture acquisition range of the camera 2;
a second step; a laser pen power supply switch 10 of the multicolor laser pen 4 is turned on, and the Bluetooth transmitter 9 is connected with a Bluetooth receiver arranged in the image processor after being electrified;
the third step: aligning a multicolor laser pen 4 to a projection area of a projection curtain 11 on a wall surface, pressing a yellow laser diode power supply switch 5 on the multicolor laser pen 4, electrifying and lighting the yellow laser diode, generating a yellow laser beam and dropping on the projection curtain 11; the Bluetooth emitter 9 sends the laser color number connected on the laser pen to a built-in Bluetooth receiver in the computer host 1 in a digital signal mode, the Bluetooth receiver transmits the digital signal of the laser color number to an image processor, and the image processor presets the display color of an image into yellow; the camera 2 collects video pictures of the projection area and transmits the video pictures to the image processor. Because the distance and the included angle between the camera and the curtain are fixed, the transverse and longitudinal pixels of the picture captured by the camera are also fixed, the image processor marks the video picture according to the coordinates of the pixels, each pixel is a coordinate point, so that a coordinate grid is created for the whole video picture, the image processor acquires the color value of each pixel in the video picture, compares the acquired color value with the preset color value of the laser pen, and the pixel area where the color value is consistent with or close to the preset color value of the laser pen is the coordinate position where the light beam falling point is located; the image processor creates a yellow dot with the diameter equal to that of the laser beam at the pixel position of the light beam landing point; finally, projecting the yellow image on a screen through a projection lens 3, and displaying a yellow origin at the laser beam lighting position on a projection screen 11;
the fourth step: moving the position of the multi-color laser pen 4 on the projection screen 11; the camera 2 continuously collects video pictures of a projection area and transmits the video pictures to the image processor, the image processor calculates the positions of laser beam points in a coordinate grid, yellow dots are continuously created at corresponding coordinate positions, all the created yellow light points are spliced into a yellow track image, the image processor projects the yellow track image on the projection curtain 11 through the projection lens 3, and track lines of the laser beam points moving on the curtain are displayed on the projection curtain 11;
the fifth step: the laser color on the multicolor laser pen 4 is switched into red laser, the red laser number of the Bluetooth emitter 9 is sent to a Bluetooth receiver arranged in the computer host 1 in a digital signal mode, the Bluetooth receiver transmits the digital signal of the red laser color number to an image processor, and the image processor presets the image display color into red; the position of the laser pen on the screen is continuously moved, the camera 2 continuously collects video pictures of the projection area and transmits the video pictures to the image processor, the image processor calculates the positions of laser beam points in the coordinate grid, then red dots are continuously created at the corresponding coordinate positions, all the created red light points are spliced into a red track image, the image processor keeps the moving track image of the yellow laser beam and projects the moving track image of the yellow laser beam and the red track image on the projection screen 11 through the projection lens 3, and track lines of the yellow laser beam and the red laser beam moving on the projection screen 11 can be displayed on the projection screen 11.
The invention also has the following additional technical features:
the technical scheme of the invention is further specifically optimized as follows: the multi-color laser pen 4 includes yellow laser, red laser, green laser and blue laser.
The technical scheme of the invention is further specifically optimized as follows: the multi-color laser pen 4 further comprises:
the yellow laser diode power supply switch 5 is used for controlling the generation and the closing of yellow laser;
a red laser diode power supply switch 6 for controlling the generation and the closing of the red laser;
a green laser diode power supply switch 7 for controlling the generation and the closing of green laser;
the blue laser diode supplies power to the switch 8 for controlling the generation and turning off of the blue laser.
The technical scheme of the invention is further specifically optimized as follows: the method of displaying the track after switching the blue and green laser beams is the same as the method of displaying the track after switching the yellow and red laser beams.
Compared with the prior art, the invention has the advantages that:
contactless drawing board projection equipment mainly is applied to office meeting scene and teaching scene, can be under the condition of contactless curtain, draws on the curtain with the laser pen, and the user has bigger home range, blocks the microorganism propagation between user and the curtain simultaneously.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a contactless palette projection apparatus according to the present invention;
fig. 2 is a schematic application diagram of the contactless sketchpad projection device of the present invention.
Description of reference numerals: the system comprises a computer host 1, a camera 2 and a projection lens 3; a multi-color laser pen 4; the system comprises a yellow laser diode power supply switch 5, a red laser diode power supply switch 6, a green laser diode power supply switch 7, a blue laser diode power supply switch 8, a Bluetooth emitter 9, a laser pen power supply switch 10 and a projection curtain 11.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings, in order that the present disclosure may be more fully understood and fully conveyed to those skilled in the art. While the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the invention is not limited to the embodiments set forth herein.
A contactless drawing board projection equipment, as shown in figure 1, is mainly applied to office meeting scenes and teaching scenes, can draw pictures on the curtain with a laser pen under the condition of not contacting the curtain, and a user has a larger range of motion and simultaneously blocks the propagation of microorganisms between the user and the curtain.
Contactless drawing board projection equipment includes:
the computer host 1, the computer host 1 includes bluetooth receiver, image processor, power; the Bluetooth receiver is used for receiving the laser color number transmitted by the multicolor laser pen 4; the image processor is used for calculating the moving track of the laser beam at the drop point of the projection screen 11, translating the moving track of the laser beam into a track image, and displaying the track image on the projection screen 11 through the projection lens 3, wherein the power supply mode of the computer host 1 can adopt a storage battery power supply mode or a transformer power supply mode;
a camera 2; the camera 2 is embedded in the computer host 1 and is used for collecting a moving track picture of a laser beam at a drop point of the projection curtain 11;
a projection lens 3; the projection lens 3 is embedded in the computer host 1 and is used for projecting the track image translated by the image processor to the projection curtain 11;
a multi-color laser pen 4; the curtain is used for emitting laser beams, lighting on the curtain and supplying power to the button cell in a power supply mode; the multicolor laser pen 4 comprises yellow laser, red laser, green laser and blue laser;
the yellow laser diode power supply switch 5 is used for controlling the generation and the closing of yellow laser;
a red laser diode power supply switch 6 for controlling the generation and the closing of the red laser;
a green laser diode power supply switch 7 for controlling the generation and the closing of green laser;
a blue laser diode power supply switch 8 for controlling the generation and the closing of the blue laser;
a Bluetooth transmitter 9 for transmitting the color data selected by the multi-color laser pen 4 to the image processor;
the laser pen power supply switch 10 is used for controlling the switch for supplying power to the multicolor laser pen 4;
the projection screen 11 is a frosted surface, so that the mirror reflection is reduced, and the camera 2 can capture the movement track of the obvious point of the relatively bright multicolor laser pen 4;
a method for displaying a track after switching blue and green laser beams is consistent with a method for displaying a track after yellow and red.
A method for using a contactless palette projection device, as shown in fig. 2, includes the following steps:
the first step is as follows: installing a projection equipment main body (a computer host 1, a camera 2 and a projection lens 3) on a wall surface, unfolding a pure white projection curtain 11 on the wall surface right below the projection equipment main body, switching on a power switch of the projection equipment, starting working of the camera 2 and the projection lens 3 after switching on the power, and completely coinciding a projection range of the projection lens 3 with a picture acquisition range of the camera 2;
a second step; a laser pen power supply switch 10 of the multicolor laser pen 4 is turned on, and the Bluetooth emitter 9 is connected with a Bluetooth receiver arranged in the image processor after being electrified;
the third step: aligning a multicolor laser pen 4 to a projection area of a projection curtain 11 on a wall surface, pressing a yellow laser diode power supply switch 5 on the multicolor laser pen 4, electrifying and lighting the yellow laser diode, generating a yellow laser beam and dropping on the projection curtain 11; the Bluetooth emitter 9 sends the laser color number communicated on the laser pen to a Bluetooth receiver arranged in the computer host 1 in a digital signal mode, the Bluetooth receiver transmits the digital signal of the laser color number to an image processor, and the image processor presets the display color of an image into yellow; the camera 2 collects video pictures of the projection area and transmits the video pictures to the image processor. Because the distance and the included angle between the camera and the curtain are fixed, the transverse and longitudinal pixels of the picture captured by the camera are also fixed, the image processor marks the video picture according to the coordinates of the pixels, each pixel is a coordinate point, so that a coordinate grid is created for the whole video picture, the image processor acquires the color value of each pixel in the video picture and compares the acquired color value with the preset color value of the laser pen, and the pixel area where the color value is consistent with or close to the preset color value of the laser pen is the coordinate position of the light beam falling point; the image processor creates a yellow dot with the diameter equal to that of the laser beam at the pixel position of the light beam landing point; finally, projecting the yellow image on a screen through a projection lens 3, and displaying a yellow origin at the laser beam lighting position on a projection screen 11;
the fourth step: moving the position of the multi-color laser pen 4 on the projection screen 11; the camera 2 continuously collects video pictures of a projection area and transmits the video pictures to the image processor, the image processor calculates the positions of laser beam points in a coordinate grid, yellow dots are continuously created at corresponding coordinate positions, all the created yellow light points are spliced into a yellow track image, the image processor projects the yellow track image on the projection curtain 11 through the projection lens 3, and track lines of the laser beam points moving on the curtain are displayed on the projection curtain 11;
the fifth step: the laser color on the multicolor laser pen 4 is switched into red laser, the red laser number of the Bluetooth emitter 9 is sent to a Bluetooth receiver arranged in the computer host 1 in a digital signal mode, the Bluetooth receiver transmits the digital signal of the red laser color number to an image processor, and the image processor presets the image display color into red; the position of the laser pen on the screen is continuously moved, the camera 2 continuously collects video pictures of the projection area and transmits the video pictures to the image processor, the image processor calculates the positions of laser beam points in the coordinate grid, then red dots are continuously created at the corresponding coordinate positions, all the created red light points are spliced into a red track image, the image processor keeps the moving track image of the yellow laser beam and projects the moving track image of the yellow laser beam and the red track image on the projection screen 11 through the projection lens 3, and track lines of the yellow laser beam and the red laser beam moving on the projection screen 11 can be displayed on the projection screen 11.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described above with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the above detailed description of the embodiments of the invention presented in the drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. 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 invention.
Claims (5)
1. A contactless palette projection device, comprising:
the computer host (1), include bluetooth receiver, image processor, power in the computer host (1); the Bluetooth receiver is used for receiving the laser color number transmitted by the multicolor laser pen (4); the image processor is used for calculating the moving track of the laser beam at the drop point of the projection screen (11), translating the moving track of the laser beam into a track image, and displaying the track image on the projection screen (11) through the projection lens (3), wherein the power supply mode of the computer host (1) can adopt a storage battery power supply mode or a transformer power supply mode;
a camera (2); the camera (2) is embedded in the computer host (1) and is used for collecting a moving track picture of a laser beam at a drop point of the projection curtain (11);
a projection lens (3); the projection lens (3) is embedded in the computer host (1) and is used for projecting the track image translated by the image processor to the projection curtain (11);
a multi-color laser pen (4); the curtain is used for emitting laser beams, lighting on the curtain and supplying power to the button cell in a power supply mode;
the Bluetooth transmitter (9) is used for transmitting the color data selected by the multicolor laser pen (4) to the image processor;
the laser pen power supply switch (10) is used for controlling a switch for controlling power supply of the multicolor laser pen (4);
the projection screen (11) is a frosted surface, so that the mirror reflection is reduced, and the camera (2) can capture the movement track of the remarkable point of the bright multicolor laser pen (4).
2. A contactless sketchpad projection apparatus according to claim 1, wherein: the multi-color laser pen (4) comprises yellow laser, red laser, green laser and blue laser.
3. A contactless sketchpad projection apparatus according to claim 2, wherein: the multicolor laser pen (4) also comprises:
the yellow laser diode power supply switch (5) is used for controlling the generation and the closing of yellow laser;
the red laser diode power supply switch (6) is used for controlling the generation and the closing of red laser;
a green laser diode power supply switch (7) for controlling the generation and the closing of green laser;
and the blue laser diode power supply switch (8) is used for controlling the generation and the closing of the blue laser.
4. A using method of a contactless drawing board projection device is characterized by comprising the following steps:
the first step is as follows: installing a computer host (1), a camera (2) and a projection lens (3) of a projection equipment main body on a wall surface, unfolding a pure white projection curtain (11) on the wall surface right below the projection equipment main body, switching on a power switch of the projection equipment, starting the camera (2) and the projection lens (3) to work after switching on the power, and completely coinciding the projection range of the projection lens (3) with the picture acquisition range of the camera (2);
a second step; a laser pen power supply switch (10) of the multicolor laser pen (4) is turned on, and the Bluetooth emitter (9) is connected with a Bluetooth receiver arranged in the image processor after being electrified;
the third step: aligning a multicolor laser pen (4) to a projection area of a projection curtain (11) on a wall surface, pressing a yellow laser diode power supply switch (5) on the multicolor laser pen (4), electrifying and lighting the yellow laser diode, generating a yellow laser beam and dropping the yellow laser beam on the projection curtain (11); the Bluetooth emitter (9) sends the laser color number communicated on the laser pen to a Bluetooth receiver arranged in the computer host (1) in a digital signal mode, the Bluetooth receiver transmits the digital signal of the laser color number to an image processor, and the image processor presets the display color of an image into yellow; the camera (2) collects video pictures of the projection area and transmits the video pictures to the image processor. Because the distance and the included angle between the camera and the curtain are fixed, the transverse and longitudinal pixels of the picture captured by the camera are also fixed, the image processor marks the video picture according to the coordinates of the pixels, each pixel is a coordinate point, so that a coordinate grid is created for the whole video picture, the image processor acquires the color value of each pixel in the video picture and compares the acquired color value with the preset color value of the laser pen, and the pixel area where the color value is consistent with or close to the preset color value of the laser pen is the coordinate position of the light beam falling point; the image processor creates a yellow dot with the diameter equal to that of the laser beam at the pixel position of the light beam landing point; finally, projecting the yellow image on a screen through a projection lens (3), and displaying a yellow origin at the laser beam lighting position on the projection screen (11);
the fourth step: moving the position of the multicolor laser pen (4) on the projection curtain (11); the camera (2) continuously collects video pictures of the projection area and transmits the video pictures to the image processor, the image processor calculates the positions of laser beam points of illumination in a coordinate grid, yellow round points are continuously created at the corresponding coordinate positions, all the created yellow light points are spliced into a yellow track image, the image processor projects the yellow track image on a projection curtain (11) through a projection lens (3), and track lines of the laser beam points of illumination moving on the curtain are displayed on the projection curtain (11);
the fifth step: the laser color on the multicolor laser pen (4) is switched into red laser, the red laser number of the Bluetooth emitter (9) is sent to a Bluetooth receiver arranged in the computer host (1) in a digital signal mode, the Bluetooth receiver transmits the digital signal of the red laser color number to an image processor, and the image processor presets the image display color into red; the position of the laser pen on the screen is continuously moved, the camera (2) continuously collects video pictures of a projection area and transmits the video pictures to the image processor, the image processor calculates the positions of laser beam points in the coordinate grid, then red round points are continuously created at the corresponding coordinate positions, all the created red light points are spliced into a red track image, the image processor keeps the moving track image of the yellow laser beam and projects the moving track image of the yellow laser beam and the red track image on the projection screen (11) through the projection lens (3), and track lines of the yellow laser beam and the red laser beam moving on the projection screen (11) can be displayed on the projection screen (11).
5. The use method of the contactless palette projection apparatus of claim 4, wherein the method of displaying the trajectory after switching between the blue and green laser beams is the same as the method of displaying the trajectory after switching between the yellow and red laser beams.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210786545.4A CN115082591A (en) | 2022-07-04 | 2022-07-04 | Non-contact drawing board projection equipment and use method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210786545.4A CN115082591A (en) | 2022-07-04 | 2022-07-04 | Non-contact drawing board projection equipment and use method |
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| Publication Number | Publication Date |
|---|---|
| CN115082591A true CN115082591A (en) | 2022-09-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210786545.4A Pending CN115082591A (en) | 2022-07-04 | 2022-07-04 | Non-contact drawing board projection equipment and use method |
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| Country | Link |
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| CN (1) | CN115082591A (en) |
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- 2022-07-04 CN CN202210786545.4A patent/CN115082591A/en active Pending
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