CN206711065U - Device for nominal light projected keyboard - Google Patents
Device for nominal light projected keyboard Download PDFInfo
- Publication number
- CN206711065U CN206711065U CN201720287660.1U CN201720287660U CN206711065U CN 206711065 U CN206711065 U CN 206711065U CN 201720287660 U CN201720287660 U CN 201720287660U CN 206711065 U CN206711065 U CN 206711065U
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- keyboard
- light projected
- camera
- projected keyboard
- casing
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Abstract
The utility model discloses a kind of device for nominal light projected keyboard, described device includes：The casing of inner hollow；Demarcation camera in casing, demarcation camera are located at the top of casing；Fixing device, fixing device are used for the bottom that light projected keyboard to be calibrated is fixed on to casing；Camera parameter calibration plate, multiple infrared LED lamps are installed on camera parameter calibration plate；Camera data acquisition and information computing device, camera data acquisition and information computing device are used for the laser projection image for gathering light projected keyboard, and keyboard positional information is calculated according to the image of collection, by the keyboard position information transfer of gained to light projected keyboard device to be calibrated.The utility model solves the image coordinate data that manually nominal light projected keyboard needs all buttons of manually determined keyboard to be calibrated, repeats, and the amount of labour is big, can not carry out the problem of light projected keyboard batch is demarcated.
Description
Technical field
The utility model belongs to light keyboard equipment calibration technique field, is used for nominal light projected keyboard more particularly to one kind
Device.
Background technology
Keyboard is one of the most frequently used input unit of electronic device, and it is widely used in computer, electronic instrument and each
On kind terminal device.Keyboard is the most frequently used and most important input equipment, can be by English alphabet, numeral, mark by keyboard
Point symbol etc. is input in computer, so as to send order, input data etc. to computer.
In order to solve conventional entity keyboard volume it is excessive, it is not portable with place, easily receive dust not easy to clean, and
Overuse the problems such as being easily damaged, and equipment manufacturer have developed virtual laser keyboard (Virtual Laser
Keyboard), virtual laser keyboard hardware is mainly made up of 3 parts, i.e. camera, keyboard projection module and infrared laser hair
Emitter.The effect of keyboard projection module is to project laser keyboard to desktop, and infrared laser transmitter is projection parallel to desktop
Or the infrared light angled with desktop, the effect of camera are to gather the positional information of finger.When the finger of people presses key
When disk projection module projects to the keyboard on desktop, camera shooting infrared laser transmitter projects infrared on finger
Light.Each the button coordinate for the keyboard that virtual laser keyboard needs to project to keyboard projection module on desktop when dispatching from the factory is deposited
Store up in memory, so when the finger of people to keyboard projection module by the keyboard on desktop is projected to, camera is clapped
Take the photograph infrared laser transmitter and project the facula information of finger, and calculate corresponding facula position coordinate, such root
Compared according to the coordinate information that camera collects with being stored before us to the key information in memory, can determine whether out user
Which button specifically pressed.The mode for obtaining each button coordinate at present is manually completed, it is necessary to which user determines
The position of all key mappings of keyboard, the repeatability that works is big and error or mistake easily occurs.
There is presently no the hardware device for being exclusively used in demarcating virtual laser keyboard, the industrialized production of virtual laser keyboard is deposited
Speed is being demarcated slowly and the problem of key mapping low precision, therefore a kind of equipment for being capable of automatic Calibration virtual laser keyboard of urgent need.
Utility model content
The purpose of this utility model is to provide a kind of device for nominal light projected keyboard, to solve virtual laser keyboard
Industrialized production the problem of demarcation speed slow and key mapping low precision be present.
To achieve these goals, the utility model provides a kind of device for nominal light projected keyboard, and it includes：It is interior
The hollow casing in portion；Demarcation camera in the casing, the demarcation camera are located at the top of casing；Fixed dress
Put, the fixing device is used for the bottom that light projected keyboard to be calibrated is fixed on to casing；Camera parameter calibration plate, it is described
Multiple infrared LED lamps are installed on camera parameter calibration plate, the infrared LED lamp is arranged with orthogonal linescan method,
Line space is equal, and column pitch is equal；Camera data acquisition and information computing device, the camera data acquisition and information meter
The laser projection image that device is used to gather light projected keyboard is calculated, and keyboard positional information is calculated according to the image of collection, by institute
Keyboard position information transfer to light projected keyboard device to be calibrated.
The utility model as described above be used for nominal light projected keyboard device, further, the casing include bottom plate,
Side plate and top plate, the casing are cube structure；Camera is demarcated to be arranged on top plate.
The utility model is used for the device of nominal light projected keyboard as described above, and further, the smooth projected keyboard is set
Put in portable computer main frame, the fixing device includes the supporting plate and baffle plate that section is L-type；The side and side of the supporting plate
Plate is fixedly connected, for placing portable computer main frame；The baffle plate is fixedly connected with side plate, for preventing portable computer master
Machine rocks.
The utility model is used for the device of nominal light projected keyboard as described above, and further, infrared LED lamp line space is
10mm~20mm, column pitch are 10mm~20mm.
The utility model is used for the device of nominal light projected keyboard as described above, and further, infrared LED lamp line space is
15mm, column pitch 15mm.
The utility model is used for the device of nominal light projected keyboard, further, the ripple of the infrared LED lamp as described above
A length of 850nm.
The utility model as described above be used for nominal light projected keyboard device, further, camera data acquisition and
Information computing device is computer, enters row data communication by USB line between computer and light projected keyboard to be calibrated.
The beneficial effects of the utility model are：
In the device that the utility model is used for nominal light projected keyboard, the effect of camera parameter calibration plate is to calculate school
Fiducial mark determines inner parameter, distortion and the external parameter of camera, and the effect for demarcating camera is to obtain smooth projected keyboard to be calibrated
Photo；Camera data acquisition and information computing device calculate keyboard positional information according to the keyboard photo to be calibrated of collection, will
The keyboard position information transfer of gained is to light projected keyboard device to be calibrated.Solving manually nominal light projected keyboard needs
The image coordinate data of all buttons of manually determined keyboard to be calibrated are wanted, are repeated, the amount of labour is big, can not carry out light projection key
The problem of disk batch is demarcated.
Brief description of the drawings
By the detailed description made in conjunction with the following drawings, of the present utility model above-mentioned and/or otherwise advantage will
Becoming more apparent upon and be easier to understand, these accompanying drawings are simply schematical, are not intended to limit the utility model, wherein：
Fig. 1 is a kind of schematic device for nominal light projected keyboard of embodiment of the utility model；
Fig. 2 is a kind of camera parameter calibration plate schematic diagram of embodiment of the utility model；
Fig. 3 is a kind of schematic flow sheet of the scaling method of the light projected keyboard of embodiment of the utility model；
Fig. 4 is a kind of light projected keyboard schematic diagram of embodiment of the utility model；
Fig. 5 is the light projected keyboard key mapping schematic diagram of the first embodiment of the utility model；
Fig. 6 is the light projected keyboard key mapping schematic diagram of second of embodiment of the utility model.
In accompanying drawing, the list of parts representated by each label is as follows：
1st, casing, 11, bottom plate, 12, top plate, the 13, first side plate, the 14, second side plate, the 15, the 3rd side plate；
2nd, fixing device, 21, supporting plate, 22, baffle plate；
3rd, camera is demarcated；
4th, camera parameter calibration plate, 41, substrate, 42, infrared LED lamp；
5th, light projected keyboard；
6th, keyboard projection module；
7th, infrared laser transmitter；
8th, equipment camera；
9th, memory；
10th, processor.
Embodiment
Hereinafter, the embodiment of the device of the present utility model for nominal light projected keyboard is described with reference to the accompanying drawings.
The embodiment recorded herein is specific embodiment of the present utility model, of the present utility model for illustrating
Design, is explanatory and exemplary, should not be construed as the limit to the utility model embodiment and the scope of the utility model
System.In addition to the embodiment recorded herein, those skilled in the art can also be based on the application claims and specification institute is public
The content opened includes doing using the embodiment to recording herein using obvious other technical schemes, these technical schemes
Go out the technical scheme of any obvious substitutions and modifications.
The accompanying drawing of this specification is schematic diagram, aids in illustrating design of the present utility model, it is schematically indicated each several part
Shape and its correlation.It note that for the ease of clearly showing the structure of each part of the utility model embodiment, respectively
Do not drawn between accompanying drawing according to identical ratio.Identical reference marker is used to represent identical part.
Fig. 1 shows a kind of device for nominal light projected keyboard of embodiment of the utility model, and it includes：Inner hollow
Casing 1；Demarcation camera 3 in casing 1, demarcation camera 3 are located at the top of casing 1；Fixing device 2, it is fixed
Device 2 is used for the bottom that light projected keyboard to be calibrated is fixed on to casing 1；Camera parameter calibration plate 4, as shown in Fig. 2 taking the photograph
Picture head parameter calibration plate includes substrate, and multiple infrared LED lamps 41 on substrate 41, and infrared LED lamp is with mutually vertical
Straight linescan method arrangement, line space is equal, and column pitch is equal；Camera data acquisition and information computing device (not shown),
Camera data acquisition and information computing device are used for the laser projection image for gathering light projected keyboard, and according to the image of collection
Keyboard positional information is calculated, by the keyboard position information transfer of gained to light projected keyboard device to be calibrated.
In a kind of specific embodiment as shown in Figure 1, casing 1 includes bottom plate 11, side plate and top plate 12, and casing 1 is vertical
Cube structure；Camera 3 is demarcated to be arranged on top plate 12.Side plate is respectively the first side plate 13, the second side plate 14 and the 3rd side plate
15, bottom plate, side plate and top plate surround the cuboidal configuration of a side opening, and aperture position is easy to the proving operation of keyboard.
Smooth projected keyboard described in the utility model can be single keyboard product, can also be in addition with calculating
The electronic equipment that the main frame of ability is combined as a whole.For example, light projected keyboard is arranged in portable computer main frame, fixing device
2 include the supporting plate 21 and baffle plate 22 that section is L-type；The side of supporting plate 21 is fixedly connected with side plate, for placing portable computer
Main frame；Baffle plate 22 is fixedly connected with side plate, for preventing portable computer main frame from rocking.
In a kind of device embodiment for being preferably used in nominal light projected keyboard, infrared LED lamp line space be 10mm~
20mm, column pitch are 10mm~20mm.A kind of preferable spacing dimension is:Infrared LED lamp line space is 15mm, and column pitch is
15mm.The wavelength of infrared LED lamp is preferably 800nm~900nm, more preferably 850nm.
The application method of the device for nominal light projected keyboard of above-described embodiment comprises the following steps:
Step 1, camera parameter calibration plate 4 is placed on the bottom of casing 1, and infrared LED lamp is fallen into demarcation camera 3
Image-capture field；
Step 2, infrared LED lamp is opened, infrared image is gathered using camera 3 is demarcated；According to the infrared image meter of collection
Calculate inner parameter, distortion and the external parameter of demarcation camera 3；
Step 3, light projected keyboard to be calibrated or portable computer main frame are fixed on the bottom of casing 1 using fixing device 2
Portion, the laser projection of light projected keyboard to be calibrated is set to be in the image-capture field of demarcation camera 3；
Step 4, light projected keyboard is opened, keyboard photo to be calibrated is gathered using camera 3 is demarcated；
Step 5, camera data acquisition and information computing device calculate keyboard position according to the keyboard photo to be calibrated of collection
Confidence ceases, by the keyboard position information transfer of gained to light projected keyboard device to be calibrated.For example, camera data acquisition and
Information computing device is computer, enters row data communication by USB line between computer and light projected keyboard to be calibrated.
A kind of specific implementation of step 5 is as follows：
Illustrate a kind of scaling method of the light projected keyboard of embodiment of the utility model, the light projection with reference to Fig. 3 and Fig. 4
Keyboard 5 includes：Keyboard projection module 6, infrared laser transmitter 7, equipment camera 8, memory 9 and processor 10；It is described
Keyboard projection module 6 is used to project dummy keyboard to operating surface；The infrared laser transmitter 7 is used for empty described in projective semimodules
Intend the infrared ray of keyboard area；The equipment camera 8 is used to gather the infrared view in the dummy keyboard region and by institute
Image transmitting is stated to processor 10；The memory 9 is used for storage keyboard location coordinate information；The processor 10 is used to handle
The infrared view that equipment camera 8 gathers is to obtain the coordinate information of the hot spot that user's finger is reflected in infrared image；
And the keyboard position coordinate information to be prestored in the coordinate information and memory 9 is contrasted what is inputted to confirm user
The information content.
The scaling method of light projected keyboard comprises the following steps：
Step 1, using the reference keyboard photo for demarcating the model machine of camera acquisition reference light projected keyboard 5, reference key is handled
Disk photo obtains the image coordinate data of four summit buttons and the image coordinate data of other buttons with reference to keyboard；
In one embodiment, image coordinate data are a plane of delineation coordinate value, according to the image coordinate of all buttons
Data calculate the image-region determined corresponding to each button.As shown in figure 5, this keyboard key-position adjoins each other, button is determined
Image coordinate data be (x, y), wherein x is the abscissa of a certain button top left corner apex, and y is the button top left corner apex
Ordinate.
In another embodiment, as shown in fig. 6, including a plane of delineation coordinate value and one group of length by image coordinate data
Width values.As shown in fig. 6, be separated by certain interval between this keyboard key-position, the image coordinate data for determining button are (x, y), (a,
B), wherein x is the abscissa of a certain button top left corner apex, and y is the ordinate of the button top left corner apex；A is each button
Length, b be each button height.
Step 2, it is to be calibrated using the keyboard photo to be calibrated for demarcating camera acquisition smooth projected keyboard 5 to be calibrated, processing
Keyboard photo obtains the image coordinate data of four summit buttons positioned at keyboard to be calibrated；
Step 3, the image coordinate number of image coordinate data and other buttons based on four summit buttons with reference to keyboard
According to, and the image coordinate data of four summit buttons of keyboard to be calibrated, obtain keyboard to be calibrated using affine transformation and remove
The image coordinate data of other buttons of four summit buttons；
Step 4, inner parameter, distortion and the external parameter and smooth projected keyboard 5 to be calibrated for demarcating camera are utilized
The image coordinate of all buttons obtains first world's coordinate data of all buttons of smooth projected keyboard 5 to be calibrated；It is described to wait to mark
First world's coordinate data of all buttons of light projected keyboard 5 is determined as keyboard position coordinate information；
Step 5, keyboard position coordinate information is stored to memory 9 to the demarcation for completing light projected keyboard 5.
In a preferred embodiment, processor 10 obtains the coordinate letter of the hot spot that user's finger is reflected in infrared image
The detailed process of breath is：The processor 10 is using inner parameter, distortion and the external parameter of equipment camera 8 by user's hand
The image coordinate for referring to reflected hot spot is converted to first world's coordinate, by first world's coordinate with being prestored in memory 9
Keyboard position coordinate information contrasted to confirm the information content that user is inputted.
Another specific implementation of step 5 is as follows：
Illustrate a kind of scaling method of the light projected keyboard of embodiment of the utility model, the light projection with reference to Fig. 3 and Fig. 4
Keyboard 5 includes：Keyboard projection module 6, infrared laser transmitter 7, equipment camera 8, memory 9 and processor 10；It is described
Keyboard projection module 6 is used to project dummy keyboard to operating surface；The infrared laser transmitter 7 is used for empty described in projective semimodules
Intend the infrared ray of keyboard area；The equipment camera 8 is used to gather the infrared view in the dummy keyboard region and by institute
Image transmitting is stated to processor 10；The memory 9 is used for storage keyboard location coordinate information；The processor 10 is used to handle
The infrared view that equipment camera 8 gathers is to obtain the coordinate information of the hot spot that user's finger is reflected in infrared image；
And the keyboard position coordinate information to be prestored in the coordinate information and memory 9 is contrasted what is inputted to confirm user
The information content.In a preferred embodiment, processor 10 obtains the coordinate of the hot spot that user's finger is reflected in infrared image
The detailed process of information is：The processor 10 is using inner parameter, distortion and the external parameter of equipment camera 8 by user
The image coordinate for the hot spot that finger is reflected is converted to first world's coordinate, will be pre- in first world's coordinate and memory 9
The keyboard position coordinate information deposited is contrasted to confirm the information content that user is inputted.
The scaling method of light projected keyboard comprises the following steps：
Step 1, using the reference keyboard photo for demarcating the model machine of camera acquisition reference light projected keyboard 5, reference key is handled
Disk photo obtains the image coordinate data of four summit buttons and the image coordinate data of other buttons with reference to keyboard；
Step 2, it is to be calibrated using the keyboard photo to be calibrated for demarcating camera acquisition smooth projected keyboard 5 to be calibrated, processing
Keyboard photo obtains the image coordinate data of four summit buttons positioned at keyboard to be calibrated；
Step 3, the image coordinate number of image coordinate data and other buttons based on four summit buttons with reference to keyboard
According to, and the image coordinate data of four summit buttons of keyboard to be calibrated, obtain keyboard to be calibrated using affine transformation and remove
The image coordinate data of other buttons of four summit buttons；
Step 4, inner parameter, distortion and the external parameter and smooth projected keyboard 5 to be calibrated for demarcating camera are utilized
The image coordinate of all buttons obtains first world's coordinate data of all buttons of smooth projected keyboard 5 to be calibrated；It is described to wait to mark
First world's coordinate data of all buttons of light projected keyboard 5 is determined as keyboard position coordinate information；Walk in the present embodiment
Also include in rapid 4：First world's coordinate data is converted into second world coordinate data using transformation matrix；The first world
Plane where coordinate is horizontal plane, the plane where the second world coordinate and horizontal plane angle zero degree to five degree it
Between；It is keyboard position coordinate information by the second world coordinate data of all buttons of smooth projected keyboard 5 to be calibrated.
Step 5, keyboard position coordinate information is stored to memory 9 to the demarcation for completing light projected keyboard 5.
In the present embodiment, processor 10 obtains the coordinate information for the hot spot that user's finger is reflected in infrared image
Detailed process is：The processor 10 is using inner parameter, distortion and the external parameter of equipment camera 8 by user's finger institute
The image coordinate of the hot spot of reflection is converted to first world's coordinate, by first world's Coordinate Conversion is the second generation using transformation matrix
Boundary's coordinate；The second world coordinate is contrasted to confirm to use with the keyboard position coordinate information to be prestored in memory 9
The information that person is inputted.
Using said apparatus and the demarcation of method progress light projected keyboard, only needs are thrown using camera acquisition reference light is demarcated
The reference keyboard photo of shadow keyboard model machine, processing obtain the image coordinate of four summit buttons with reference to keyboard with reference to keyboard photo
The image coordinate data of data and other buttons；For that can be reused with a batch of smooth projected keyboard, this data.It is right
Only need to obtain the image coordinate data of four summit buttons positioned at keyboard to be calibrated in smooth projected keyboard to be calibrated, solve
Manually nominal light projected keyboard needs the image coordinate data of all buttons of manually determined keyboard to be calibrated, repeats,
The amount of labour is big, can not carry out the problem of light projected keyboard batch is demarcated.
Each technical characteristic of above-mentioned disclosure is not limited to disclosed and further feature combination, and those skilled in the art are also
Other combinations between each technical characteristic can be carried out according to the purpose of utility model, are defined by the purpose for realizing the utility model.
Claims (7)
- A kind of 1. device for nominal light projected keyboard, it is characterised in that including：The casing of inner hollow；Installed in described Demarcation camera in casing, the demarcation camera are located at the top of casing；Fixing device, the fixing device are used to treat The light projected keyboard of demarcation is fixed on the bottom of casing；Camera parameter calibration plate, install on the camera parameter calibration plate There are multiple infrared LED lamps, the infrared LED lamp is arranged with orthogonal linescan method, and line space is equal, and column pitch is equal； Camera data acquisition and information computing device, the camera data acquisition and information computing device are used to gather light projection key The laser projection image of disk, and keyboard positional information is calculated according to the image of collection, by the keyboard position information transfer of gained extremely Light projected keyboard device to be calibrated.
- 2. the device according to claim 1 for nominal light projected keyboard, it is characterised in that the casing includes bottom Plate, side plate and top plate, the casing are cube structure；Camera is demarcated to be arranged on top plate.
- 3. the device according to claim 1 for nominal light projected keyboard, it is characterised in that the smooth projected keyboard is set Put in portable computer main frame, the fixing device includes the supporting plate and baffle plate that section is L-type；The side and side of the supporting plate Plate is fixedly connected, for placing portable computer main frame；The baffle plate is fixedly connected with side plate, for preventing portable computer master Machine rocks.
- 4. the device according to claim 1 for nominal light projected keyboard, it is characterised in that infrared LED lamp line space For 10mm~20mm, column pitch is 10mm~20mm.
- 5. the device according to claim 1 for nominal light projected keyboard, it is characterised in that infrared LED lamp line space For 15mm, column pitch 15mm.
- 6. the device according to claim 1 for nominal light projected keyboard, it is characterised in that the infrared LED lamp Wavelength is 850nm.
- 7. the device according to claim 1 for nominal light projected keyboard, it is characterised in that the camera data are adopted Integrate and information computing device is computer, row data communication is entered by USB line between computer and light projected keyboard to be calibrated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720287660.1U CN206711065U (en) | 2017-03-23 | 2017-03-23 | Device for nominal light projected keyboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720287660.1U CN206711065U (en) | 2017-03-23 | 2017-03-23 | Device for nominal light projected keyboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206711065U true CN206711065U (en) | 2017-12-05 |
Family
ID=60471065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720287660.1U Withdrawn - After Issue CN206711065U (en) | 2017-03-23 | 2017-03-23 | Device for nominal light projected keyboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206711065U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106802745B (en) * | 2017-03-23 | 2018-04-06 | 哈尔滨拓博科技有限公司 | Device and its application method for nominal light projected keyboard |
| CN110413111A (en) * | 2019-07-09 | 2019-11-05 | 南京大学 | A kind of target keyboard tracing system and method |
-
2017
- 2017-03-23 CN CN201720287660.1U patent/CN206711065U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106802745B (en) * | 2017-03-23 | 2018-04-06 | 哈尔滨拓博科技有限公司 | Device and its application method for nominal light projected keyboard |
| CN110413111A (en) * | 2019-07-09 | 2019-11-05 | 南京大学 | A kind of target keyboard tracing system and method |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20171205 Effective date of abandoning: 20180406 |