CN107506055B - Slide show control device - Google Patents
Slide show control device Download PDFInfo
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- CN107506055B CN107506055B CN201710741747.6A CN201710741747A CN107506055B CN 107506055 B CN107506055 B CN 107506055B CN 201710741747 A CN201710741747 A CN 201710741747A CN 107506055 B CN107506055 B CN 107506055B
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- camera
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- control module
- laser
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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
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
- G06F3/03542—Light pens for emitting or receiving light
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/10—Program control for peripheral devices
-
- 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
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/038—Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry
- G06F3/0383—Signal control means within the pointing device
-
- 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
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
- G06F3/0425—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means using a single imaging device like a video camera for tracking the absolute position of a single or a plurality of objects with respect to an imaged reference surface, e.g. video camera imaging a display or a projection screen, a table or a wall surface, on which a computer generated image is displayed or projected
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- Multimedia (AREA)
- Projection Apparatus (AREA)
- Controls And Circuits For Display Device (AREA)
Abstract
The invention relates to the technical field of slide control, in particular to a slide demonstration control device which comprises a camera, a laser pen, an adjusting bracket, a control module, an infrared projector, an input module, a storage module and demonstration glasses. The camera is adjustable focus camera, and the laser pen can send the laser with different frequency scintillation, is equipped with the function button on the laser pen, and different function buttons correspond different scintillation frequency, and the function button includes that the angle corrects the button and the button is corrected to the proportion, still includes the adjustment support, is equipped with the second step motor that is used for adjusting the first step motor of camera angle of pitch and is used for adjusting camera yaw on the adjustment support. The slide demonstration control device provided by the invention can solve the problem of inaccurate laser point detection caused by the deviation of the installation position of the camera, and can help a user to smoothly demonstrate.
Description
Technical Field
The invention relates to the technical field of slide control, in particular to a slide demonstration control device.
Background
In a presentation or conference, slide presentation software is typically used to present relevant material content via a projector or large screen display device. While a laser pointer is used in a presentation or conference to indicate the content being taught on a projector or a large screen. But such a laser pointer cannot interact with the slide presentation software. Therefore, people who use the laser pen often see that people need to use a whiteboard additionally to perform drawing explanation, or need to instruct people who operate a computer how to operate, or operate the computer by themselves, which obviously causes inconvenience to the explanation people and also causes the explanation process to be not smooth enough.
The existing solution is to transmit the user's operations (such as turning pages, motor, drawing lines, etc.) to the computer by tracking and positioning the laser point of the laser pen and matching with corresponding communication hardware, such as bluetooth, WiFi, etc., thereby realizing the interaction between the laser pen and the computer and simplifying the control flow of slide presentation. Tracking of laser points is usually accomplished by means of a camera and corresponding modules such as image rectification, coordinate mapping and coordinate transformation, and generally includes the following steps: 1. capturing an image using a camera; 2. correcting the image; 3. detecting the position of a laser point in a captured image; 4. converting the position coordinates of the laser point from a coordinate system in a captured image into a computer screen coordinate system; 5. the coordinate information is used to plot or control a computer mouse pointer.
However, when a user manually installs a camera, the placement position and the angle of the camera are greatly different, so that the image acquired by the camera sometimes generates large distortion, and an image correction algorithm cannot cope with all situations, so that in actual use, the problem that the laser point is not accurately positioned usually exists.
Disclosure of Invention
The invention aims to provide a slide show control device which can solve the problem of inaccurate laser point detection caused by the deviation of the installation position of a camera.
In order to solve the technical problem, the patent provides the following basic technical scheme:
slide demonstration controlling means, including camera and laser pen, the camera is focus adjustable camera, and the laser pen can send the laser with different frequency scintillation, be equipped with the function button on the laser pen, different function buttons correspond different scintillation frequencies, the function button includes that the button is corrected to the angle and the button is corrected to the proportion, still includes:
the adjusting bracket is used for mounting a camera and is provided with a first stepping motor used for adjusting the pitch angle of the camera and a second stepping motor used for adjusting the yaw angle of the camera;
a control module which is in signal connection with the camera, the first stepping motor and the second stepping motor, the control module is also in signal connection with a computer, and is used for tracking and positioning the laser point and controlling the showing of a computer slide according to the position of the laser point and the operation of a user, the control module can acquire the image of the projector and the laser point of the laser pen through the camera, the control module can detect the flicker frequency of the laser point, the control module can control the first stepping motor and the second stepping motor to respectively adjust the pitch angle and the yaw angle of the camera when detecting that the flicker frequency of the laser point is the frequency corresponding to the angle correction key until the laser point is positioned at the center of the image collected by the camera, the control module can adjust the focal length of the camera to the maximum image of the projector in the camera acquisition range when detecting that the laser point flicker frequency is the frequency corresponding to the proportional adjustment key.
The working principle and the beneficial effects of the invention are as follows:
firstly, a camera is installed on an adjusting bracket, then a laser pen is opened, a laser point is placed in the center of a projection pattern of a projector, an angle correcting button is pressed, the laser point flickers according to a preset frequency, a control module acquires the position of the laser point and the flickering frequency of the laser point through the camera, the currently used angle correcting function is judged according to the flickering frequency of the laser point, the control module controls a first stepping motor to rotate, the pitch angle of the camera is further adjusted, when the laser point is detected to be positioned in the center of the vertical direction of the shooting range of the camera, the first stepping motor is stopped, a second stepping motor is controlled to rotate, the yaw angle of the camera is adjusted until the laser point is positioned in the center of the horizontal direction of the shooting range of the camera, then a proportion adjusting button is pressed, the laser point flickers at other frequencies, and the control module controls and adjusts the focal length of the camera, and then continuously adjusting the shooting range of the camera until the upper and lower boundaries or the left and right boundaries of the projection pattern of the projector coincide with the upper and lower boundaries or the left and right boundaries of the shooting range of the camera, wherein the shooting range of the camera contains the complete and maximum projection pattern of the projector, then slide presentation can be started, the control module can acquire the position and the flicker frequency of the laser spot in real time, and then the position and the flicker frequency are converted into control over the computer slide presentation process through coordinate transformation and the like.
According to the technical scheme, the adjusting bracket, the angle adjusting button and the proportion adjusting button can be used for automatically adjusting the shooting angle of the camera, the projected pattern basically fills the shooting range of the camera, so that different users can obtain images with basically the same angle and range after installing the device, information is transmitted by adopting the flashing frequency of the laser spot, the camera can be directly used without adding an additional communication module, and the method is simpler and more convenient.
Further, the function button still includes left button, rule button, last page button and next page button, control module can control the computer cursor and carry out the function that left button was pressed corresponding to the position when detecting facula flicker frequency for the frequency that the click button corresponds, control module can control the computer slide and get into the painting brush function when detecting facula flicker frequency for the frequency that the rule button corresponds, control module can control the computer slide and play last page when detecting facula flicker frequency and be the frequency that last page button corresponds, control module can control the computer slide and play next page when detecting facula flicker frequency and be the frequency that next page button corresponds.
The control of the laser pen on the common functions of the slide show is realized through the left key, the line drawing key, the previous page key and the next page key.
Further, still include input module, storage module, infrared projector and demonstration glasses, infrared projector installs in camera one side, the angle of pitch and the yaw angle that infrared projector also can be controlled respectively to first step motor and second step motor, infrared projector and controller signal connection, the controller can control infrared projector's focus the same with the camera, input module, storage module signal all with control module signal connection, input module is used for predetermineeing the characters to setting for in the storage module, infrared projector can be to projecting the characters of predetermineeing in the storage module with infrared light on the curtain, demonstration glasses lens can turn into the visible light with infrared light.
The user can input some prompt characters for demonstration through the input module and projects the prompt characters through the infrared projector, and due to the fact that the characters cannot be directly seen by audiences through infrared light, the prompts can be seen by a demonstrator through demonstration glasses, and smooth proceeding of demonstration is facilitated; the infrared projector is arranged on one side of the camera, so that the controller adjusts the focal length, the pitch angle and the yaw angle of the camera and adjusts the focal length, the pitch angle and the yaw angle of the infrared projector at the same time, the trouble of repeatedly adjusting the infrared projector is avoided, and the projection effect of the infrared projector is ensured.
Furthermore, the manufacturing material of one lens of the demonstration glasses is a common resin material, and the manufacturing material of the other lens of the demonstration glasses is a material capable of converting infrared light into visible light.
One lens is made of common resin materials, so that a wearer can see normal pictures, and smooth demonstration is facilitated.
Further, the material capable of converting infrared light into visible light is an optical frequency doubling crystal material made of potassium titanyl phosphate crystals.
The optical frequency doubling wafer made of the potassium titanyl phosphate crystal can convert infrared light into green visible light, and the light conversion efficiency is high.
Furthermore, the control module and the computer are connected through WiFi.
The notebook has WiFi connection, so that extra lines can be avoided by adopting WiFi connection, and the notebook is simple and convenient.
Drawings
Fig. 1 is a schematic structural diagram of an adjusting bracket in an embodiment of a slide show control apparatus according to the present invention.
Detailed Description
The present invention will be described in further detail below by way of specific embodiments:
description of reference numerals: the device comprises a second stepping motor 1, a first stepping motor 2, a camera 3 and an infrared projector 4.
The slide demonstration control device of the embodiment comprises a camera 3, a laser pen, an adjusting bracket, a control module, an infrared projector 4, an input module, a storage module and demonstration glasses, wherein:
the camera 3 is used for shooting images of a projector and a laser pen, the camera 3 is the camera 3 with an adjustable focal length, and in order to ensure the definition and resolution of a shot picture, the camera 3 in the embodiment is preferably a VPC800 series high-definition camera 3; the camera 3 is installed on the adjusting bracket, the adjusting bracket comprises a supporting plate for installing the camera 3, a first stepping motor 2 for adjusting the pitch angle of the camera 3, a second stepping motor 1 for adjusting the yaw angle of the camera 3 and a tray for installing the supporting plate and the second stepping motor 1, the side surface of the supporting plate is welded with an output shaft of the first stepping motor 2, the first stepping motor 2 is fixed on the tray through screws, the bottom of the tray is fixedly connected with an output shaft of the second stepping motor 1, and the output shaft of the second stepping motor 1 is arranged along the vertical direction; the infrared projector 4 is arranged on one side of the camera 3 and can adjust a pitch angle and a yaw angle along with the camera 3;
the laser pen can emit laser which flickers at different frequencies, function keys are arranged on the laser pen, the different function keys correspond to different flickering frequencies, and the function keys comprise an angle correction key, a proportion correction key, a left key, a line drawing key, a previous page key and a next page key;
the control module is in signal connection with the camera 3, the first stepping motor 2 and the second stepping motor 1, is also in signal connection with a computer, is in a WiFi connection mode with the computer, is used for tracking and positioning laser points and controlling projection of a computer slide according to the positions of the laser points and operation of a user, can acquire images of a projector and the laser points of a laser pen through the camera 3, and can detect the flicker frequency of the laser points; the control module in the embodiment consists of a K60 series single chip microcomputer and corresponding peripheral circuits;
the control module can control the first stepping motor 2 and the second stepping motor 1 to respectively adjust the pitch angle and the yaw angle of the camera 3 to the center of the image collected by the camera 3 when detecting that the laser point flicker frequency is the frequency corresponding to the angle correction key, the control module can adjust the focal length of the camera 3 until the image of the projector is the maximum in the collection range of the camera 3 when detecting that the laser point flicker frequency is the frequency corresponding to the proportional adjustment key, the control module can control a computer cursor to execute the function that a left key is pressed at the corresponding position when detecting that the light spot flicker frequency is the frequency corresponding to the click key, the control module can control a computer slide to enter a painting brush function when detecting that the light spot flicker frequency is the frequency corresponding to the scribe key, the control module can control the computer slide to play the previous page when detecting that the light spot flicker frequency is the frequency corresponding to the previous page of key, the control module can control the computer slide to play the next page when detecting that the light spot flickering frequency is the frequency corresponding to the next page of keys;
the input module and the storage module are in signal connection with the control module, the input module is preferably a keyboard, the input module is used for setting preset characters in the storage module, and the infrared projector 4 can project the preset characters in the storage module onto the curtain by infrared rays;
one lens of the demonstration glasses is made of a common resin material, the other lens is made of an optical frequency doubling crystal material made of a potassium titanyl phosphate crystal, and the optical frequency doubling wafer made of the potassium titanyl phosphate crystal can convert infrared light passing through 1064nm into green visible light with the wavelength of 532nm, so that the infrared wavelength of an infrared emitter adopted by the infrared projector 4 in the embodiment is set to be 1064 nm.
When the device is used, firstly, the camera 3 and the infrared projector 4 are installed on the adjusting bracket, then the laser pen is opened, the laser point is placed in the center of the projected pattern of the projector, the angle correction button is pressed, the laser point flickers according to the preset frequency, the control module acquires the position of the laser point and the flickering frequency of the laser point through the camera 3, the currently used angle correction function is judged according to the flickering frequency of the laser point, the control module controls the first stepping motor 2 to rotate, further adjusts the pitch angle of the camera 3, when the laser point is detected to be positioned in the center of the vertical direction of the shooting range of the camera 3, the first stepping motor 2 is stopped, then the second stepping motor 1 is controlled to rotate, the yaw angle of the camera 3 is adjusted until the laser point is positioned in the center of the horizontal direction of the shooting range of the camera 3, and then the proportion adjusting button is pressed, the laser points flash at other frequencies, the control module controls and adjusts the focal length of the camera 3, and further continuously adjusts the shooting range of the camera 3 until the upper and lower boundaries or the left and right boundaries of the projection pattern of the projector coincide with the upper and lower boundaries or the left and right boundaries of the shooting range of the camera 3, at this time, the shooting range of the camera 3 contains the complete and maximum projection pattern of the projector, the control module is connected with the computer through WiFi, a user can input some prompt characters for demonstration through the input module and wear demonstration glasses, and then can start the slide demonstration, a demonstrator can control the playing of the slide through the function keys of the next page, the previous page and the like, the control module can obtain the positions and the flash frequencies of the laser points in real time, then the laser points are converted into the control of the computer demonstration process through coordinate transformation and the like, the infrared projector 4 projects the prompt characters by infrared rays, because the audience can not directly see the characters by adopting infrared light, the presenter can see the prompts through the demonstration glasses, and further the demonstration is helped to be smoothly carried out.
The foregoing is merely an example of the present invention, and common general knowledge in the field of known specific structures and characteristics is not described herein in any greater extent than that known in the art at the filing date or prior to the priority date of the application, so that those skilled in the art can now appreciate that all of the above-described techniques in this field and have the ability to apply routine experimentation before this date can be combined with one or more of the present teachings to complete and implement the present invention, and that certain typical known structures or known methods do not pose any impediments to the implementation of the present invention by those skilled in the art. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (6)
1. Slide demonstration controlling means, including camera and laser pen, its characterized in that: the camera is the adjustable focal length camera, and the laser pen can send the laser with different frequency scintillation, be equipped with the function button on the laser pen, different function buttons correspond different scintillation frequency, the function button includes that the angle is corrected the button and the button is corrected to the proportion, still includes:
the adjusting bracket is used for mounting a camera and is provided with a first stepping motor used for adjusting the pitch angle of the camera and a second stepping motor used for adjusting the yaw angle of the camera;
a control module which is in signal connection with the camera, the first stepping motor and the second stepping motor, the control module is also in signal connection with a computer, and is used for tracking and positioning the laser point and controlling the showing of a computer slide according to the position of the laser point and the operation of a user, the control module can acquire the image of the projector and the laser point of the laser pen through the camera, the control module can detect the flicker frequency of the laser point, the control module can control the first stepping motor and the second stepping motor to respectively adjust the pitch angle and the yaw angle of the camera when detecting that the flicker frequency of the laser point is the frequency corresponding to the angle correction key until the laser point is positioned at the center of the image collected by the camera, the control module can adjust the focal length of the camera to the maximum image of the projector in the camera acquisition range when detecting that the laser point flicker frequency is the frequency corresponding to the proportional adjustment key.
2. The slide presentation control device of claim 1, wherein: the function button still includes left key button, lineation button, last page button and next page button, control module can control the computer cursor and carry out the function that left button was pressed corresponding to the position when detecting facula flicker frequency for the frequency that the click button corresponds, control module can control the computer slide and get into the painting brush function when detecting facula flicker frequency for the frequency that the lineation button corresponds, control module can control the computer slide and play last page when detecting facula flicker frequency and be the frequency that last page button corresponds, control module can control the computer slide and play next page when detecting facula flicker frequency and be the frequency that next page button corresponds.
3. The slide presentation control device of claim 1, wherein: still include input module, storage module, infrared projector and demonstration glasses, infrared projector installs in camera one side, the angle of pitch and the yaw angle that infrared projector also can be controlled respectively to first step motor and second step motor, infrared projector and controller signal connection, the controller can control infrared projector's focus the same with the camera, input module, storage module signal all with control module signal connection, input module is used for presetting the characters to setting for in the storage module, infrared projector can be to projecting the characters of presetting in the storage module with infrared light on the curtain, demonstration glasses lens can turn into the visible light with infrared light.
4. The slide presentation control device of claim 3, wherein: the demonstration glasses are characterized in that one lens of the demonstration glasses is made of a common resin material, and the other lens of the demonstration glasses is made of a material capable of converting infrared light into visible light.
5. The slide presentation control device of claim 4, wherein: the material capable of converting infrared light into visible light is an optical frequency doubling crystal material made of potassium titanyl phosphate crystals.
6. The slide presentation control device of claim 1, wherein: the control module is connected with the computer through WiFi.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710741747.6A CN107506055B (en) | 2017-08-25 | 2017-08-25 | Slide show control device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710741747.6A CN107506055B (en) | 2017-08-25 | 2017-08-25 | Slide show control device |
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| CN107506055A CN107506055A (en) | 2017-12-22 |
| CN107506055B true CN107506055B (en) | 2020-05-22 |
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| CN201710741747.6A Expired - Fee Related CN107506055B (en) | 2017-08-25 | 2017-08-25 | Slide show control device |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108196702A (en) * | 2017-12-27 | 2018-06-22 | 威创集团股份有限公司 | A kind of splicing video wall interactive approach and system, laser pen |
| CN110213407B (en) * | 2019-05-28 | 2021-06-08 | Oppo（重庆）智能科技有限公司 | Electronic device, operation method thereof and computer storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101620485A (en) * | 2009-07-16 | 2010-01-06 | 广东威创视讯科技股份有限公司 | Device and method for positioning light source |
| CN102945091A (en) * | 2012-11-20 | 2013-02-27 | 深圳市中科睿成智能科技有限公司 | Method and system for man-machine interaction and based on laser projection location |
| CN106598288A (en) * | 2016-11-22 | 2017-04-26 | 张新民 | Positioning system and method for laser pen mouse |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7794094B2 (en) * | 2006-05-26 | 2010-09-14 | Sony Corporation | System and method for multi-directional positioning of projected images |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101620485A (en) * | 2009-07-16 | 2010-01-06 | 广东威创视讯科技股份有限公司 | Device and method for positioning light source |
| CN102945091A (en) * | 2012-11-20 | 2013-02-27 | 深圳市中科睿成智能科技有限公司 | Method and system for man-machine interaction and based on laser projection location |
| CN106598288A (en) * | 2016-11-22 | 2017-04-26 | 张新民 | Positioning system and method for laser pen mouse |
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