CN104484073A - Hand touch interaction system - Google Patents
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- CN104484073A CN104484073A CN201410845978.8A CN201410845978A CN104484073A CN 104484073 A CN104484073 A CN 104484073A CN 201410845978 A CN201410845978 A CN 201410845978A CN 104484073 A CN104484073 A CN 104484073A
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Classifications
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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
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
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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
- G06F3/011—Arrangements for interaction with the human body, e.g. for user immersion in virtual reality
- G06F3/014—Hand-worn input/output arrangements, e.g. data gloves
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- G—PHYSICS
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- 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
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
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- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
- G06F3/0488—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures
- G06F3/04883—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures for inputting data by handwriting, e.g. gesture or text
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/048—Indexing scheme relating to G06F3/048
- G06F2203/04808—Several contacts: gestures triggering a specific function, e.g. scrolling, zooming, right-click, when the user establishes several contacts with the surface simultaneously; e.g. using several fingers or a combination of fingers and pen
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
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Abstract
The invention discloses a hand touch interaction system which comprises a main controller, a hand touch sensor and a client-side arranged in a terminal device, wherein the hand touch sensor is connected with the main controller by a finger touch sensing layer; the hand touch sensor is used for detecting the touch actions of all contacts and transmitting the touch state information into the main controller; the main controller is used for carrying out data acquisition, comprehensive operation and control on more than one sensing device; the client-side is used for controlling the output of interactive results according to the information obtained by the acquisition and comprehensive operation of the main controller. According to the system, the touch or slide actions of fingers and palms can be detected by the hand touch sensor, the direction and the motion state of the hands can be detected by the other sensing devices, a finger contact detection part is used for replacing keyboard input, and a hand space displacement detection device is used for replacing a mouse, so that a more convenient and faster human-computer interaction way is provided.
Description
Technical field
The present invention relates to man-machine interaction input technology, particularly relate to a kind of hand and touch interactive system.
Background technology
Touch screen technology is a kind of novel man-machine interaction input mode, compares with mouse input mode with traditional keyboard, and touch-screen input is more directly perceived.Perfect along with touch screen technology, due to the convenience of manipulation, touch-screen instead of mouse and keyboard in many occasions gradually.Relevant information, primarily of touch detection part and touch screen controller composition, before touch detection part is arranged on indicator screen, for detecting touch location, is then sent to touch screen controller by touch-screen.The Main Function of touch screen controller is receive touch information from touch point detection device, and is converted into contact coordinate and sends CPU to, receives instruction that CPU sends simultaneously and is performed.Coordinate identification software, can also realize the functions such as handwriting input by touch-screen, current touch-screen develops into multipoint touch screen by initial single-point touch screen.
Although touch-screen has more advantage than keyboard and mouse, three characteristics due to touch-screen cause and make it have following shortcoming:
One is transparent.As the first characteristic of touch-screen, transparency directly affects the visual effect of touch-screen.A lot of touch-screen is the laminated film of multilayer, is only inadequate by the visual effect that this feature transparent summarizes it, at least should comprises four characteristics: transparency, color distortion degree, reflective and sharpness.Due to the existence of light transmission and wavelength curve figure, the image seen by touch-screen inevitably produces color distortion compared with original image.When observing through touch-screen, static image sensation just color distortion, dynamic multi-media image then can produce certain fuzzy.Reflective mainly refers to because mirror-reflection causes shadow on image after overlap, as the shadow, window, light etc.The touch-screen environment for use that reflective is strong is greatly limited.Touch-screen reflective through frosted process obviously declines, but its transparency and sharpness also significantly reduce.The sharpness brought after installing touch-screen additional declines and easily causes the fatigue of eyes, and Long-Time Service easily causes the injury of eyes.
Its two, absolute coordinate system.Touch-screen adopts absolute coordinate system, select and where just where put.With the essential distinction of this kind of relative coordinate of mouse system be absolute coordinate system each time the elements of a fix and the last elements of a fix it doesn't matter.This just requires that touch-screen no matter when, and the output data of same point should be consistent with stable.If unstable, so touch-screen just can not ensure that absolute coordinates is located, i.e. contact drift.Along with the development of technology, large-sized FPD becomes more and more popular, the touch-screen institute problems faced adopting absolute coordinate system will be more obvious, screen has much, its required area touched just has much, in order to touch relevant position, also needs staff to move more at a distance, when screen area increases to a certain degree, then lose the convenience that touch-screen itself brings.
Its three, detect touch and locate.Various touch screen technology is all rely on respective sensor to carry out work, even touch-screen inherently a set of sensor.Respective positioning principle and sensor used determine the reaction velocity of touch-screen, reliability, stability and life-span.
From current touch-screen present situation, adopt the touch-screen price of infrared technique lower, but its housing rapid wear, easily produce light interference, easy distortion in curved surface situation; Adopt the touch screen design reasonable idea of capacitance technology, but after adopting composite membrane, image distortion problems is difficult to be solved at all; Adopt the touch-screen accurate positioning of resistive technologies, but on the high side, and be afraid of to scrape rapid wear; And adopt the touch-screen sharpness of surface acoustic wave technique good, if but screen surface has water droplet and dust etc., can cause touching blunt even touch malfunctioning.Along with large-sized FPD screen popular, touch-screen can face larger challenge technically.
And adopt the man-machine interaction input technology of other technologies.Such as:
1) Kinnect of Microsoft, it is integrated with the function such as instant motion capture, image identification, change the mode of operation in the past using keyboard, mouse, handle etc. single, and there is hard recognition and gesture support function, but Kinnect is as game peripheral, its accuracy of identification is lower, response speed is comparatively slow, and the hand interactive mode based on motion capture, image recognition technology is easily subject to the impact of external environment, poor reliability, cannot be adapted to real-time, that reliability requirement is high application scenario.
2) the Leap Motion hand interactive controlling technology of Leap company, compare Kinnect technology, have and can identify the hand position of user and the feature of motion quickly and accurately, but because Leap Motion adopts the technology of infrared LED+dual camera, the hand of user must be in and identify in field, exceed and identify that critical section or Toe Transplantation for Segmental Finger are by the situations such as other finger obscures, system is None-identified then.The too small meeting in cog region limits its range of application, and excessive being then difficult in cog region ensures precision and anti-interference, cannot be applied to the high occasion of reliability requirement equally.
3) the MYO wristband art of Thalmic Labs company, belong to a control terminal, its ultimate principle is, the bioelectricity change produced when utilizing the inductor on arm bag to catch the motion of user's arm muscles, judge the intention of wearer, then the result of computer process is sent to controlled plant by bluetooth.MYO adopts inner detection, and advantage is not by the restriction of use occasion, more natural alternately, but its accuracy of identification and gesture enrich the restriction that degree is subject to service condition equally.
At present, domestic hand interactive system is still in the development stage, mostly adopts the cam movement capturing technology similar with Kinnect.Because the difficulty of hand interaction technique is high, be difficult to ensure reliable precision and response speed, market there is no reliable hand interactive system product.
Summary of the invention
In view of this, fundamental purpose of the present invention is to provide a kind of hand to touch interactive system, hand touch sensor is utilized to detect touching or the sliding action of finger and palm, gyroscope, accelerometer, magnetometer is utilized to detect orientation and the motion state of hand, alternative input through keyboard is carried out by finger contact detection part, and adopt hand space displacement pick-up unit to substitute mouse, design one man-machine interaction mode more easily, to overcome the defect of existing touch screen technology and other hand interactive controlling technology.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of hand touches interactive system, comprises master controller; The client also comprising hand touch sensor and be installed in terminal device; Described hand touch sensor comprises and being connected with master controller through finger touch sensitive layer, is detected the touch action of each contact, and touch condition information is sent to master controller by hand touch sensor; Described master controller is used for carrying out data acquisition, comprehensive computing and control to more than one senser element; Described client according to master controller gather, the information of comprehensive computing controls to export mutual result.
Wherein, described finger touch inductive layer is flexible touch layer or has the structure with its similar functions.
Described finger touch inductive layer, is positioned at the finger abdomen of four, left hand finger and refers on the left of side, and the finger abdomen of four, right hand finger and refer on the right side of side; Pointed by four, left hand described in right-hand man's thumb and homonymy or/and the right hand four fingers cooperatively interact carry out various touch interactive operation.
By client setting thumb and all the other various operations that four refer to different parts, different touch manner combines, realize different manipulation result.
Described hand touch sensor is also integrated with filtering, shielding device.
Described master controller is connected with bus mode with terminal device.
Described senser element comprise further be connected with described master controller gyroscope, accelerometer is or/and magnetometer.
Described master controller is also for gathering gyroscope, accelerometer or/and every data of magnetometer, and the interface through presetting after calculation process is sent to client.
Described gyroscope is for detecting turning to of hand, and accelerometer is then for detecting the straight-line displacement acceleration of hand.
Described magnetometer is for detecting the magnetic field orientation of the relative earth in position residing for hand.
Hand provided by the present invention touches interactive system, has the following advantages:
The invention describes a kind of hand interactive system adopting the devices such as flexible touch sensor, gyroscope, accelerometer, magnetometer to set up.This interactive system advantage compared with other man-machine interaction modes is as follows:
1) keyboard and mouse.This system can realize and keyboard and the similar function of mouse.Compared to keyboard and mouse, the advantage of system of the present invention not provides character, text event detection function faster, and with provide one control mode more easily.
2) touch-screen.Compared to touching screen, this hand touches interactive system and overcomes the shortcomings such as the intrinsic image fault of current touch-screen, image blurring, contact drift, poor reliability, is especially adapted to giant-screen Display panel.
3) Kinnect and Leap Motion, all adopts external detection, compares the precision and speed that are limited to detection, and is subject to extraneous interference.System of the present invention adopts inner detection, and accuracy of detection and speed and extraneous environment for use have nothing to do, and therefore have higher real-time and reliability.
4) because native system adopts inner detection, do not affect by extraneous environment for use, compared to MYO wrist strap, native system has and more touches identification, higher reliability, can complete more function simultaneously.
Accompanying drawing explanation
Fig. 1 is the functional block diagram that embodiment of the present invention hand touches interactive system;
Fig. 2 is the products application schematic diagram that hand of the present invention touches interactive system;
Fig. 2 a and Fig. 2 b is existing touch sensible network example figure;
The volume coordinate system schematic diagram that Fig. 3 adopts for the touch of hand shown in Fig. 1 interactive system;
Fig. 4 is the master controller workflow schematic diagram of the touch of hand shown in Fig. 1 interactive system.
Embodiment
Touch interactive system below in conjunction with accompanying drawing and embodiments of the invention to hand of the present invention to be described in further detail.
Fig. 1 is the functional block diagram that embodiment of the present invention hand touches interactive system.As shown in Figure 1, this hand touches interactive system, forms primarily of master controller, hand touch sensor and the client be installed in terminal device.
Finger and the palm of people are transplanted in flexible touch screen detection part installation site by the present invention by screen panel, carry out alternative input through keyboard by finger contact detection part, and adopt hand locus pick-up unit to substitute mouse.Except the flexible touch sensor-based system of four fingers, all the other each several part control system are all positioned at the back of the hand portion.Touch-sensing system adopts highly reliable flexible touch sensing material to make, and meets the normal physiological bending requirement of staff.
Wherein, the hand touch sensor of the present invention's design points at four the flexible touch inductive layer that distributes, its structure adopts the structure similar with flexible touch screen, flexible touch inductive layer is arranged at the finger abdomen of four, left hand finger and refers on the left of side, and the finger abdomen of four, right hand finger on the right side of side, facilitates thumb to operate on it with referring to.
Fig. 2 is the products application schematic diagram that hand of the present invention touches interactive system.Mesh portion is as shown in Figure 2 the distribution situation of four finger flexible touch inductive layers, with the touch sensible network class shown in Fig. 2 a and Fig. 2 b seemingly, difference is that the touch sensible network shown in Fig. 2 a and Fig. 2 b is positioned on display screen, and the touch display network in the present invention is positioned at four Fingers faces except thumb and refers to side.
When flexible touch inductive layer is applied in product as shown in Figure 2, the right side as shown in Fig. 2 a, Fig. 2 b, for being positioned at the flexible touch network example of four fingers, by detecting the difference touching display network, can obtain the X/Y coordinate figure of different touch point.This X/Y coordinate figure sends master controller to by bus, carries out analytic operation by master controller device to it.In the client, the keyboard value that different X/Y values is corresponding different can be specified, such as, be positioned at the Petting Area X/Y value of forefinger side finger tip for (0,0), in client software, specify the key value of X/Y value corresponding to button Q of (0 ± 2,0 ± 2).When thumb touches forefinger side finger tip, flexible touch network by X/Y value transmit now to master controller, master controller judges that this X/Y value is positioned at X/Y value scope corresponding to button Q, and the message producing button Q thus sends to operating system, completes the realization that Q key presses function.In like manner, by the different set of client software, the functions such as different buttons, mouse-click, double mouse click can be produced, by the detection to internal coordinate value continuous time, the slide of flexible touch network can be detected, thus complete the operation of similar mouse roller.
Based on above-mentioned principle, the operation such as the flexible touch inductive layer being positioned at four fingers can carry out variously tapping to four fingers by thumb, slip.Realizing the function of similar keyboard typing by tapping operation, realizing by slide operations such as amplifying, reduce, by software set thumb and all the other various operations that four refer to different parts, different touch manner combines, and then realizing various function.Because hand touch sensor supports that multiple point touching detects, therefore, the touch of multiple different parts can be detected simultaneously, the Macintosh function of similar keyboard can be realized thus.
Hand touch sensor, detects the touch action of each contact, and touch condition information is sent to master controller.For ensureing the reliability detected, hand touch sensor is also integrated with filtering, shielding device.In order to adapt to the otherness of staff, hand touch sensor is also integrated with calibration function.
Gyroscope/accelerometer, gyroscope is for detecting turning to of hand, and accelerometer detects the straight-line displacement acceleration of hand.These two modules coordinate can complete the mobility detect of hand in space.The present invention adopts volume coordinate system as shown in Figure 3, staff is converted to coordinate information at the mobile message in space and is sent in master controller, is the movable information of mouse by master controller by hand exercise information analysis.Owing to adopting the relative coordinate system identical with mouse, wearer only needs hand exercise by a small margin can make mouse on screen, produce the movement of long distance, which solves the touch-screen problem that staff mobile range is excessive when giant-screen panel application, decrease the fatigue of hand.
Magnetometer, the magnetometer that the present invention adopts attaches by ferronickel film the belt magnetoresistive element that silicon chip forms, and these magnetoresistive elements align between two, forms a common sensitive axes.In the presence of a magnetic field, the change of magnetoresistive element will cause corresponding voltage to change, and therefore, magnetometer is converted to the relatively signal magnetic field orientation residing for differential voltage detection hand by any incident magnetic measured on direction of principal axis.By using magnetometer location, gyroscope can be made to have higher acceleration and lower mechanical noise, correct the rotation error of accelerometer simultaneously, ensure the accuracy that hand exercise detects.Gyroscope, accelerometer and magnetometer coordinate the cursor locomotive function realizing mouse, ensure that the accuracy of cursor.
Master controller, can adopt integrated I
2the low-power scm of the data-transformation facility such as C interface and USB interface, for gathering every data of hand touch sensor, gyroscope, accelerometer, magnetometer, and is sent in terminal device (built in client) by USB interface after calculation process.As the core devices of system of the present invention, master controller is for gathering initialization, the data acquisition, the comprehensively function such as computing, control of each point of device.Such as, when wearer does not need mouse function, gyroscope, accelerometer and magnetometer can be closed by master controller.Master controller adopts standard USB protocol, and the aggregation of data of each point of device is resolved to general keyboard, mouse signal, and its workflow as shown in Figure 4.
Fig. 4 is the master controller workflow schematic diagram of the touch of hand shown in Fig. 1 interactive system.This master controller adopts power-switching circuit, is directly powered by USB interface.Electric pressure needed for each components and parts work is different, is supplied to each device after needing power-switching circuit USB normal voltage to be changed.Because each voltage is all no more than 10V, all within the scope of safe voltage, therefore this product can not work the mischief to human body.
Client of the present invention, i.e. terminal software, described terminal software runs in each platform operating system, provides and includes but not limited to following function:
1) the button appointed function of each contact.
Hand of the present invention touches the button specified scheme of the integrated a set of acquiescence of interactive system itself, and be the different demands of satisfied different wearer, this terminal software can touch difference, sliding sets different buttons, wearer can revise the button set at any time.
2) calibration function of each contact.
Due to hand size, finger thickness, the length difference of different wearer, for adapting to the hand exercise of different wearer, this terminal software is integrated with the calibration function of each contact.
3) the sensitivity setting of hand touch sensor.
This terminal software is integrated with the sensitivity set-up function of hand touch sensor, and different sensitivity settings can bring different touch manipulation sensations, and wearer can select the sensitivity of the most comfortable to set.
4) hand exercise sensitivity setting.
This terminal software integrated hand exercise sensitivity set-up function, different sensitivity settings can bring different cursor manipulation sensations, and wearer can select the sensitivity of the most comfortable to set.
5) function setting such as mouse-click, double-click.
Hand exercise achieves cursor locomotive function, and for realizing the functions such as the clicking of mouse, double-click, the left button of mouse, middle key, right button can be assigned on certain part touch sensible electrode slice by user, realizes clicking, double-click function by touching corresponding electrode slice.
6) aerial gesture function setting.
The present invention also detects the relative displacement of hand in space by displacement transducer, therefore, it is possible to detect the relative movement of staff, can the function corresponding to aerial gesture be set by this function.
7) preservation of touch key-press specified scheme, import feature.
For different environments for use, such as, shortcut for different software operates, and wearer can set different button specified scheme.The preservation of the integrated contact button specified scheme of this terminal software, import feature, wearer can call different button specified scheme under various circumstances.
Hand of the present invention touches interactive system in use, thumb taps or slide accordingly to all the other four fingering row, produce thus and tap or slip signals, this signal is converted to corresponding control signal after master controller detects, this control signal produces various control effect by software or other modes, such as: the click function being similar to mouse, the typewriting function being similar to keyboard, the controlling functions etc. being similar to switch.
The invention describes a kind of hand adopting the devices such as hand touch sensor, gyroscope, accelerometer, magnetometer to set up and touch interactive system.This system can realize the function similar with keyboard, mouse, touch-screen.Compared to keyboard and mouse, hand of the present invention touches interactive system and provides one control mode more easily; Compared to touch-screen, this hand touches interactive system and overcomes the shortcomings such as the intrinsic image fault of current touch-screen, image blurring, contact drift, poor reliability, is especially adapted to giant-screen Display panel.This hand interactive system is safe, reliable, convenient, can be applicable to multiple occasion.
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.
Claims (10)
1. hand touches an interactive system, comprises master controller; It is characterized in that, the client also comprising hand touch sensor and be installed in terminal device; Described hand touch sensor is connected with master controller through finger touch sensitive layer, is detected the touch action of each contact, and touch condition information is sent to master controller by hand touch sensor; Described master controller is used for carrying out data acquisition, comprehensive computing and control to more than one senser element; Described client according to master controller gather, the information of comprehensive computing controls to export mutual result.
2. hand according to claim 1 touches interactive system, and it is characterized in that, described finger touch inductive layer is flexible touch layer or the structure with function similar with it.
3. hand according to claim 2 touches interactive system, it is characterized in that, described finger touch inductive layer, is arranged at the finger abdomen of four, left hand finger and refers on the left of side, and the finger abdomen of four, right hand finger and refer on the right side of side; Pointed by four, left hand described in right-hand man's thumb and homonymy or/and the right hand four fingers cooperatively interact carry out various touch interactive operation.
4. hand according to claim 3 touches interactive system, it is characterized in that, by client setting thumb and all the other various operations that four refer to different parts, different touch manner combines, realizes different manipulation result.
5. hand according to claim 1 touches interactive system, and it is characterized in that, described hand touch sensor is also integrated with filtering, shielding device.
6. hand according to claim 1 touches interactive system, and it is characterized in that, described master controller is connected with bus mode with terminal device.
7. hand according to claim 1 touches interactive system, it is characterized in that, described senser element comprise further be connected with described master controller gyroscope, accelerometer is or/and magnetometer.
8. hand according to claim 7 touches interactive system, it is characterized in that, described master controller is for gathering hand touch sensor, gyroscope, accelerometer or/and every data of magnetometer, and the interface through presetting after calculation process is sent to client.
9. hand according to claim 7 touches interactive system, and it is characterized in that, described gyroscope is for detecting turning to of hand, and accelerometer is then for detecting the straight-line displacement acceleration of hand.
10. hand according to claim 7 touches interactive system, and it is characterized in that, described magnetometer is for detecting the magnetic field orientation of the relative earth in position residing for hand.
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| CN201410845978.8A CN104484073B (en) | 2014-12-31 | 2014-12-31 | Hand touches interactive system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107850979A (en) * | 2015-08-03 | 2018-03-27 | 三星电子株式会社 | Display device and its control method |
| CN109947243A (en) * | 2019-03-01 | 2019-06-28 | 清华大学 | Gesture capture and recognition technology for smart electronic devices based on touch hand detection |
| CN110780732A (en) * | 2019-09-06 | 2020-02-11 | 北京理工大学 | Input system based on space positioning and finger clicking |
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| CN109947243A (en) * | 2019-03-01 | 2019-06-28 | 清华大学 | Gesture capture and recognition technology for smart electronic devices based on touch hand detection |
| CN109947243B (en) * | 2019-03-01 | 2021-09-28 | 清华大学 | Intelligent electronic equipment gesture capturing and recognizing technology based on touch hand detection |
| CN110780732A (en) * | 2019-09-06 | 2020-02-11 | 北京理工大学 | Input system based on space positioning and finger clicking |
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| CN104484073B (en) | 2018-03-30 |
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