CN111880671A - Laser pen indicating system and method for positioning laser pen indicating cursor - Google Patents
Laser pen indicating system and method for positioning laser pen indicating cursor Download PDFInfo
- Publication number
- CN111880671A CN111880671A CN202010652453.8A CN202010652453A CN111880671A CN 111880671 A CN111880671 A CN 111880671A CN 202010652453 A CN202010652453 A CN 202010652453A CN 111880671 A CN111880671 A CN 111880671A
- Authority
- CN
- China
- Prior art keywords
- laser pen
- projection screen
- laser
- light
- camera
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000006243 chemical reaction Methods 0.000 claims abstract description 13
- 230000003287 optical effect Effects 0.000 claims abstract description 9
- 238000001914 filtration Methods 0.000 claims abstract description 7
- 230000000694 effects Effects 0.000 claims description 3
- 230000002452 interceptive effect Effects 0.000 claims description 3
- 230000005611 electricity Effects 0.000 abstract description 4
- 230000006870 function Effects 0.000 description 6
- 238000004590 computer program Methods 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010009 beating Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
- G06F3/03545—Pens or stylus
-
- 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
- G06F3/0386—Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry for light pen
Abstract
The invention discloses a laser pen indicating system and a method for positioning a laser pen indicating cursor, wherein the laser pen indicating system comprises: the system comprises a laser pen, a processor, a camera, a light filter and a projection screen; the laser pen is used for emitting red light beams with specific wavelengths, and the target file is selected through action; the camera is used for capturing a light spot signal on a projection screen in real time, and the optical filter is positioned on the camera lens and used for filtering an interference light source; the projection screen is used for displaying a target file, a light spot signal and a selection action of the laser pen for selecting the target file in real time; the processor is embedded in the laser pen and the camera and used for acquiring position information and key codes of light spots and realizing conversion between the key actions of the laser pen and the selection actions of the projection screen. Interference is removed through the optical filter, stable and reliable positioning of light spots is achieved, and encoding is effective and error-free; meanwhile, the cost of a laser pen mouse receiving and transmitting system is reduced, and electricity is saved.
Description
Technical Field
The invention belongs to the technical field of optical instruments and computers, and particularly relates to a laser pen indicating system and a method for positioning a laser pen indicating cursor.
Background
The projecting apparatus is used for places such as teaching, meeting, and the meeting is instructed with the laser pen, and in order to increase experience, the cooperation camera can fix a position cursor position, develops laser pen mouse, has the same left and right keys of mouse and the key function in the gyro wheel on this kind of laser pen, and the person of speaking can control the computer without computer mouse.
The conventional laser pen has red laser and blue laser, is low in price, only has an indication function and a PPT page turning function, and does not have functions of searching a menu of a mouse, clicking any file and selecting a pull-down menu.
The wireless module is added to the combination of a wireless receiver, a camera and a laser pen on the market, the key information needs to be transmitted to a computer host in a wireless (Bluetooth and WIFI) mode, so that the whole operation cost and power consumption are increased, particularly, the laser pen requires the volume to be as small as possible and the battery consumption to be as low as possible, the wireless module is added, the battery is frequently replaced, or the volume of the laser pen is increased, and a larger battery is placed to obtain longer service time, so that the wireless module, the camera and the laser pen are not beautiful.
Disclosure of Invention
In view of the above problems, the present invention is directed to solving, at least to some extent, one of the technical problems in the related art. According to the laser pen indicating system provided by the embodiment of the invention, the wireless module is saved by the laser coding method and the processor demodulation method, and the problems of the cost, the power consumption, the inaccurate positioning and the like of the laser pen are solved.
In view of the above technical problem, an embodiment of a first aspect of the present invention provides a laser pointer indicating system, including: the system comprises a laser pen, a processor, a camera, a light filter and a projection screen; the laser pen is used for emitting red light beams with specific wavelengths, and the target file is selected through action; the camera is used for capturing a light spot signal on a projection screen in real time, and the optical filter is positioned on the camera lens and used for filtering an interference light source; the projection screen is used for displaying a target file, a light spot signal and a selection action of the laser pen for selecting the target file in real time; the processor is embedded in the laser pen and the camera and used for acquiring the position information of the light spots and realizing the conversion between the key action of the laser pen and the selection action of the projection screen.
The processor includes: and the acquisition unit is used for acquiring the position information of the light spot. And the coding unit is used for coding and realizing the conversion of the laser pen key action corresponding to the light spot information and the projection screen selection action.
The processor further comprises: and the judging unit is used for judging whether the red light emitted by the laser pen is continuous or not.
The scanning frequency of the camera for capturing the light spot signal on the projection screen in real time is the same as the encoding frequency of the encoding unit.
The second aspect of the invention discloses a method for positioning a cursor indicated by a laser pen, which comprises the following steps:
the laser pen emits red light with a specific wavelength, and the target file is selected through the key action of the laser pen.
According to one embodiment of the invention, the selection of the target file is realized through the key action of the laser pen, which comprises the following steps:
and capturing the red light beam with the specific wavelength emitted by the laser pen in real time, and determining the red light spot corresponding to the red light beam with the specific wavelength. And extracting the position information of the red light spot.
And the coding realizes the conversion of the laser pen key action corresponding to the light spot information and the projection screen selection action.
According to an embodiment of the present invention, the capturing the red light beam with the specific wavelength emitted by the laser pen in real time includes capturing the red light beam with the specific wavelength emitted by the laser pen in real time through a scanning manner.
According to an embodiment of the invention, the coding realizes the conversion of the laser pen key action corresponding to the light spot information and the projection screen selection action, and includes the conversion of the laser pen key action corresponding to the light spot information and the projection screen selection action according to the coding frequency coding.
According to one embodiment of the invention, the scanning frequency is the same as the encoding frequency.
According to one embodiment of the invention, determining the red spot corresponding to the red beam of light of a particular wavelength includes filtering the interfering light source through a filter.
A third aspect of the invention discloses an electronic device comprising a processor and a memory; the processor executes a program corresponding to the executable program code by reading the executable program code stored in the memory, so as to realize the method for positioning the laser pointer.
A fourth aspect of the invention discloses a non-transitory computer readable storage medium having stored thereon a computer program, characterized in that the computer program, when being executed by a processor, is adapted to carry out the above-mentioned method of laser pointer pointing cursor positioning.
The invention achieves the technical effects that: interference is removed, and stable and reliable positioning is realized; the cost of the laser pen mouse is reduced, and meanwhile, the electricity is saved.
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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a block diagram of a laser pointer pointing system according to an embodiment of the present invention;
FIG. 2 is a flowchart of a method for positioning a cursor indicated by a laser pointer according to an embodiment of the present invention;
fig. 3 is a flowchart of a method for selecting a target file by a key operation of a laser pointer according to an embodiment of the present invention.
Detailed Description
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 will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative effort belong to the protection scope of the embodiments of the present invention.
The laser pointer pointing system 100 of the present invention, as shown in FIG. 1, includes: laser pointer 101, processor 102, camera 103, filter 104 and projection screen 105.
The laser pen 101 can emit red light with a specific wavelength, the laser pen 101 is provided with a left key, a right key and a front-back rolling key, the left key and the right key can realize that a wireless mouse is used for left-clicking a selected file, right-clicking is used for operating a pull-down menu of the file, and the front-back rolling key has a front-back rolling function similar to a mouse roller.
The camera 103 is used for capturing a light spot signal on a projection screen in real time, and the optical filter 104 is located on the lens and used for filtering an interference light source.
650nm red light is selected for the laser pen 101 light source, and when red light projected on projection screen 105, high definition digtal camera can catch in real time, adds 650nm narrowband filter on the camera lens, and most light will be filtered, and only the wavelength is close to the red light of 650nm can be caught, and we just so can see obvious red facula.
The processor 102 is located inside the laser pen and the camera, and first obtains the position information of the light spot, and then completes the functions of the left and right keys and the front and back scroll keys through code modulation.
Specifically, the processor 102 obtains an average value of red pixels in one frame of image, and then performs a point-by-point comparison, because the red pixel value at the light spot (i.e. the point irradiated by the laser) is significantly higher than the average value, as long as the point with the largest red pixel in the frame of image is obtained, the position of the light spot is the point, and the position information of the point is extracted.
The coded modulation follows because the light beam emitted by the laser pointer 101 is pulse coded, setting the scanning frequency of the camera to coincide with its coding frequency. The number 1 is set to correspond to light and the number 0 to no light.
The following encoding rules are set in the processor 102, and the processor 102 is not limited to the embedded processor DSP and may be other processors or terminals.
When the laser pen 101 does not press a key, the laser is continuous, and the code is 1111111; when a key is pressed, the laser is not continuous any more, when a left key is pressed, the code is 11001011, 110 is the start of the key, the next two bits are code values, and finally, the code is immediately finished after 11 represents, and the left key operation is executed when the code is received by the encoder; correspondingly, when the right key is pressed, the code is 1100111, and the right key operation is executed; when the forward scroll key is pressed, the code is 1101011, and forward scroll operation is executed; when a rear scroll key is pressed, the code is 1101111, and a backward scroll operation is executed;
a set of valid codes encodes at least 7 bits, i.e., 7 frame times; if the left button is held down continuously, 11000111100011 … … cycles, then a drag operation is performed on the file. The coded values correspond to the keys as table 1 below:
TABLE 1
| Name of key | Encoding a value | Code value |
| Left-hand beating | 1100011 | 0 |
| Right click | 1100111 | 1 |
| Front roll | 1101011 | 2 |
| Back roll | 1101111 | 3 |
The invention achieves the following beneficial effects: interference is removed, and stable and reliable positioning is realized; the cost of the laser pen mouse is reduced, and meanwhile, the electricity is saved.
The second aspect of the present invention discloses a method for positioning a cursor indicated by a laser pointer, as shown in fig. 2, comprising:
s1, emitting red light with specific wavelength by the laser pen;
and S2, selecting the target file through the key action of the laser pen.
According to an embodiment of the present invention, the selecting of the target file is realized by a key action of the laser pointer, as shown in fig. 3, including:
and S21, capturing the red light beam with the specific wavelength emitted by the laser pen in real time, and determining the red light spot corresponding to the red light beam with the specific wavelength.
And S22, extracting the position information of the red light spot.
And S23, coding to realize the conversion between the laser pen key action and the projection screen selection action corresponding to the light spot information.
According to an embodiment of the present invention, the capturing the red light beam with the specific wavelength emitted by the laser pen in real time includes capturing the red light beam with the specific wavelength emitted by the laser pen in real time through a scanning manner.
According to an embodiment of the invention, the coding realizes the conversion of the laser pen key action corresponding to the light spot information and the projection screen selection action, and includes the conversion of the laser pen key action corresponding to the light spot information and the projection screen selection action according to the coding frequency coding.
According to one embodiment of the invention, the scanning frequency is the same as the encoding frequency.
According to one embodiment of the invention, determining the red spot corresponding to the red beam of light of a particular wavelength includes filtering the interfering light source through a filter.
A third aspect of the invention discloses an electronic device comprising a processor and a memory; the processor executes a program corresponding to the executable program code by reading the executable program code stored in the memory, so as to realize the method for positioning the laser pointer.
A fourth aspect of the invention discloses a non-transitory computer readable storage medium having stored thereon a computer program, characterized in that the computer program, when being executed by a processor, is adapted to carry out the above-mentioned method of laser pointer pointing cursor positioning.
The invention achieves the technical effects that: interference is removed through the optical filter, and stable and reliable positioning of light spots is achieved; meanwhile, the cost of the laser pen mouse is reduced, and electricity is saved.
The evaluation and analysis software related to the present invention is not developed by the inventor, and is a technique familiar to those skilled in the art.
It should be understood that the above-described embodiments are merely exemplary for illustrating the application of the present method and are not limiting, and that various other modifications and changes may be made by those skilled in the art based on the above description for studying the related problems. Therefore, the protection scope of the present invention should be defined by the appended claims.
Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
The above-described embodiments of the electronic device and the like are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may also be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the embodiments of the present invention, and are not limited thereto; although embodiments of the present invention have been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A laser pointer pointing system, comprising: the system comprises a laser pen, a processor, a camera, a light filter and a projection screen; the laser pen is used for emitting red light beams with specific wavelengths, and the target file is selected through action; the camera is used for capturing a light spot signal on a projection screen in real time, and the optical filter is positioned on the camera lens and used for filtering an interference light source; the projection screen is used for displaying a target file, a light spot signal and a selection action of the laser pen for selecting the target file in real time; the processor is embedded in the laser pen and the camera and used for acquiring position information and coding information of light spots and realizing conversion between the key action of the laser pen and the selection action of the projection screen.
2. The laser pointer pointing system of claim 1, wherein the processor comprises:
the acquisition unit is used for acquiring the position information of the light spot;
and the coding unit is used for coding and realizing the conversion of the laser pen key action codes corresponding to the light spot information and the projection screen selection action decoding.
3. The laser pointer pointing system of claim 2, wherein the processor further comprises:
and the judging unit is used for judging whether the red light emitted by the laser pen is continuous or not.
4. The laser pointer pointing system according to any one of claims 1-3, wherein the scanning frequency of the camera capturing the light spot signal on the projection screen in real time is the same as the encoding frequency of the encoding unit.
5. A method for pointing cursor with a laser pointer, the method comprising:
the laser pen emits red light with a specific wavelength, and the target file is selected through the key action of the laser pen.
6. The method of claim 5, wherein the selecting the target file is realized by a key action of a laser pen, comprising:
capturing the red light beam with the specific wavelength emitted by the laser pen in real time, and determining a red light spot corresponding to the red light beam with the specific wavelength;
extracting position information of the red light spot;
and the coding realizes the conversion of the laser pen key action corresponding to the light spot information and the projection screen selection action.
7. The method of claim 6, wherein capturing the red light beam emitted by the laser pointer at the specific wavelength in real time comprises capturing the red light beam emitted by the laser pointer at the specific wavelength in real time by scanning.
8. The method of claim 6, wherein the encoding effects a conversion of the laser pointer key actuation corresponding to the spot information to a projection screen selection actuation, comprising encoding the laser pointer key actuation corresponding to the spot information to a projection screen selection actuation according to an encoding frequency.
9. The method of claim 7 or 8, wherein the scanning frequency is the same as the encoding frequency.
10. The method of claim 7, determining a red spot corresponding to a red beam of light of a particular wavelength, comprising filtering the interfering light source through a filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010652453.8A CN111880671A (en) | 2020-07-08 | 2020-07-08 | Laser pen indicating system and method for positioning laser pen indicating cursor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010652453.8A CN111880671A (en) | 2020-07-08 | 2020-07-08 | Laser pen indicating system and method for positioning laser pen indicating cursor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111880671A true CN111880671A (en) | 2020-11-03 |
Family
ID=73150890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010652453.8A Pending CN111880671A (en) | 2020-07-08 | 2020-07-08 | Laser pen indicating system and method for positioning laser pen indicating cursor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111880671A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5115230A (en) * | 1989-07-19 | 1992-05-19 | Bell Communications Research, Inc. | Light-pen system for projected images |
| CN1299987A (en) * | 2001-01-17 | 2001-06-20 | 上海交通大学 | Interactive projecting display system with laser remote controller |
| CN1746831A (en) * | 2004-09-08 | 2006-03-15 | 上海迪比特实业有限公司 | Interactive projection system |
| CN106598288A (en) * | 2016-11-22 | 2017-04-26 | 张新民 | Positioning system and method for laser pen mouse |
| CN107102781A (en) * | 2017-04-17 | 2017-08-29 | 华东师范大学 | A kind of tagging stylus and multipoint touch interactive system |
-
2020
- 2020-07-08 CN CN202010652453.8A patent/CN111880671A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5115230A (en) * | 1989-07-19 | 1992-05-19 | Bell Communications Research, Inc. | Light-pen system for projected images |
| CN1299987A (en) * | 2001-01-17 | 2001-06-20 | 上海交通大学 | Interactive projecting display system with laser remote controller |
| CN1746831A (en) * | 2004-09-08 | 2006-03-15 | 上海迪比特实业有限公司 | Interactive projection system |
| CN106598288A (en) * | 2016-11-22 | 2017-04-26 | 张新民 | Positioning system and method for laser pen mouse |
| CN107102781A (en) * | 2017-04-17 | 2017-08-29 | 华东师范大学 | A kind of tagging stylus and multipoint touch interactive system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7502053B2 (en) | Information-processing device and information-processing system | |
| CN107690653B (en) | Method and device for acquiring fingerprint image and terminal equipment | |
| CN111026915B (en) | Video classification method, video classification device, storage medium and electronic equipment | |
| CN105430440B (en) | Multimedia information playing heat processing method, server and client | |
| Zhang et al. | Indepth: Real-time depth inpainting for mobile augmented reality | |
| CN111880671A (en) | Laser pen indicating system and method for positioning laser pen indicating cursor | |
| Weerts et al. | Can fairness be automated? Guidelines and opportunities for fairness-aware AutoML | |
| US9607201B1 (en) | Systems and methods for non-permanent operator customization of a scanning device | |
| CN110704727A (en) | Information pushing method and device and computer equipment | |
| CN112967180A (en) | Training method for generating countermeasure network, and image style conversion method and device | |
| CN111797647A (en) | Bar code decoding method and device | |
| CN110570288A (en) | Auction system, price quotation device, order generation method and order processing method | |
| CN114724643A (en) | Method for screening polypeptide compound and related device | |
| CN115619311A (en) | Spare part tracking and use monitoring method and device | |
| CN116109322A (en) | Data acquisition method, data acquisition device, and computer-readable storage medium | |
| CN110503055B (en) | Friend adding method, device and system and storage medium | |
| CN114116418A (en) | Information processing method and device, computer storage medium and electronic equipment | |
| CN112989933A (en) | Oil smoke concentration identification method and system, electronic equipment and storage medium | |
| CN110033344A (en) | Skin care item recommended method, device and storage medium neural network based | |
| CN117379033B (en) | Skin pigment detection method, device, computer equipment and storage medium | |
| CN109214474A (en) | Behavioural analysis, information coding risk analysis method and device based on information coding | |
| CN113469438B (en) | Data processing method, device, equipment and storage medium | |
| CN112152718B (en) | Information identification method and device, intelligent wearable device and storage device | |
| CN115054925B (en) | Method, device, server and storage medium for determining lost user | |
| CN116548980B (en) | Long-time-interval electrocardiograph classification method and system based on pulse neural network |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |