CN1499343A - Application of finger recognition and action recognition of finger in input tool such as keyboard - Google Patents
Application of finger recognition and action recognition of finger in input tool such as keyboard Download PDFInfo
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- CN1499343A CN1499343A CNA021385491A CN02138549A CN1499343A CN 1499343 A CN1499343 A CN 1499343A CN A021385491 A CNA021385491 A CN A021385491A CN 02138549 A CN02138549 A CN 02138549A CN 1499343 A CN1499343 A CN 1499343A
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Abstract
Based on laser scanning knocking hand, a digital circuit analyzes a position sensor so as to obtain data of finger position and recognize knocking finger as well as recognize moving mode of the hand. Generation of key value can be determined from key mapping signal generated by keyboard or touch screen and finger recognition signal solely or jointly as well as from signal of moving mode of the hand and finger recognition signal solely or jointly. The invention reduces number of keys greatly. If continuous positions of finger can be recognized, and ratio between movement of finger and movement of mouse is determined, it is possible to use finger to replace mouse. Moreover, middle finger is set as positioning finger, fingers left to the middle finger as left click, and fingers right to the middle finger as right click.
Description
Affiliated technical field
The present invention relates to a kind of data input technology that is used for electronic equipment, can be used for substituting or improving keyboard, also can realize mouse function.
Background technology
In traditional input mode, carry out with following processes usually: the position of the corresponding keys of input value is treated in entry personnel identification, then with finger tapping or touch this position to trigger input signal, produces corresponding key assignments.In this manner, as not considering Macintosh, key assignments is corresponding one by one with the key position, and promptly quantity equates, therefore traditional input equipment need have a large amount of key positions.So cause the volume of input equipment can not narrow down to satisfied size, particularly for the utilization on mancarried electronic aid.
Summary of the invention
The present invention uses the optical alignment technology, position pointing the scanning light spot that forms with optic position sensor, thereby determine finger position and identification finger, with identification signal as definite key assignments.Determine following idea earlier, input also can be man-machine communication's a process, exist the identification mutually that interacts, the importer is when the identification key position, electronic equipment also can be discerned the finger of carrying out input action and the action of finger simultaneously, and as middle finger forward, the third finger backward, the little finger of toe of the right hand is knocking, or the like.In this manner, click the quantity * discernible finger number of confirmable key assignments number=key position, perhaps click the move mode of confirmable key assignments number=discernible finger number * discernible hand, by first formula we as can be known, at the key assignments selected that keeps considerable amount simultaneously, key total can minimum be 1/10th of a key assignments number, in following embodiment 1, example 2, we can see that under the situation that does not reduce input speed, efficient, the number of key significantly reduces.By second formula as can be known,, promptly do not exist under the situation of keyboard yet, can realize input yet even there is not the key position.
Description of drawings
Fig. 1 (A), (B) are operation workflow of the present invention and data flow.
Fig. 2 (A), (B) are for being applicable to the beam flying scope of this paper listed examples.
Fig. 3 takes place and scanister for being applicable to a kind of laser of the present invention.
Fig. 4 is embodiment 1 figure.
Fig. 5,6 is embodiment 2 figure.
Fig. 7 is embodiment 3 figure.
Fig. 8 is oblique mobile definition figure.
Embodiment
Below in conjunction with embodiment 1, example 2, example 3, embodiments of the present invention are described.In following example, predetermined operation person's sight line is projected as Y-axis on key face or desktop, and direction forward.X, Y-axis all are positioned on the keyboard plane or on the desktop.
Can think in short time after knocking, as finger in 1/5 second is static, if adversary's fingering this moment row continuous sweep, then can obtain the position data of all fingers, because the length difference of finger, so single pass can not guarantee to obtain the position data of all fingers, need to adjust direction and scan repeatedly.Therefore following regulation is made in the direction of scanning: vertical angle of first line scanning is determined by the position of knocking finger.Depart from some angles later on and scan as 2～5 degree, the allocation of scanning is at interscan in 1/5 second 5 to 10 row, and obviously more line number diminishes the possibility that erroneous judgement takes place, and above numeral all is adjustable.They have determined identification that the probability of error takes place.21 be the scanning both port of origination in the drawings as Fig. 2 (A), 2 (B), 25 are the scanning initial direction, and 26 for finishing direction, and 27 be the direction of scanning, 28 zones of action for finger, finish a line scanning after, adjust scanning angle, continue to scan.
The scope of scanning is determined according to the distance of hand and scanning mirror and the scope of activities of hand, need should guarantee the finger of identification to be scanned.
Fig. 3 takes place for laser and scanister Figure 20, generating laser, and 21, scanning, 22, convergent lens, 23, rotation drive motor, 24, catoptron
Fig. 4 is the planimetric map of the input keyboard of embodiment 1 employing, and 9 keys are arranged in the keyboard of Fig. 4, and it is actually the part of keypad for cellular phone.
Among the figure 1, keyboard, 2, the ejecting end of Laser emission and scanister, 3, the receiving terminal 4 of position transducer, keycap
Wherein, keycap can constitute identification input action generating means.2, finger apparatus is knocked in 3 formation identifications.
When a finger when knocking a certain key, started recognizer and scanning device in a period of time subsequently as 1/5th seconds or shorter, CPU handles the data that position transducer obtains.Scanning device begins scanning, when scanning first barrier, counter adds 1 by 0, become 1, and the position data of record reflection spot this moment, when the hot spot blackout, also be that scanning light beam is when scanning interdigital space of hand, record position data at this moment, can obtain two marginal date of first finger thus, counter is in state to be added, when scanning barrier once more, counter adds 1 and becomes 2, and record position data, according to aforementioned counting and record scheme, after finishing a line scanning, when the data of register less than 4 the time, promptly scan when being lower than 4 fingers, the scanning of beginning next line, counter is changed to 0, by aforementioned manner scanning numeration, after a certain places scanning is finished, counter be 4 just stop scanning, (note: in this programme, the nonrecognition thumb, because thumb makes in this input mode and is used less, so only needing counter is 4, if attempt to discern thumb, then register be 5 just stop scanning), can obtain the position data of 4 groups of fingers thus, each group is corresponding to two marginal position data of finger, 4 fingers are followed successively by forefinger, middle finger, nameless, little finger of toe, (suppose this enforcement adopt the right hand input), the position data with the key that prestores contrasts with the finger position data then, and the coordinate of the directions X of key should be greater than a lateral edges coordinate that knocks finger, less than the opposite side coordinate, because the finger that the operator knocks is parallel to sight line usually, thus above conclusion can be got, in the actual mechanical process, if operator's finger be not be parallel to Y-axis the marginal position data that might point all greater than or all less than the position data of key, if it is within reason that finger tilts, then seek the finger that marginal date approaches the position data of key most, this scheme can not make a mistake usually yet.
After the identification signal of signal that obtains the key position and finger, CPU determines key assignments according to key value mapping table.
In Fig. 4, numeral on the key is single hand-held set input value, when single hand-held set, the input finger is thumb, recognition result can only obtain a width of pointing and pointing very big (being actually the oblique-angle projection of thumb length), can identify single hand-held set thus, digital distribution on the button when distributing key assignments.If left hand-held set, right hand input, following scheme is adopted in the mapping of key assignments, with forefinger, middle finger, when the third finger knocks, correspond respectively to first, second, third in three English alphabets under the key, " 9 " key only need distribute two, when knocking with little finger of toe, distribute other special symbol, the key assignments mapping scheme is flexibly certainly.
By above-mentioned, this programme has requirement to the attitude of operator's hand, can be considered as rational restriction.
This programme has solved the limitation of the input of portable equipment.
Fig. 5 is embodiment 2 figure, in the present embodiment, allows the existence of other keys, and this figure only illustrates part wherein.
Among the figure 1, keyboard, 2, the ejecting end of Laser emission and scanister, 3, the receiving terminal 4 of position transducer, key
In this example, do not allow both hands that crossed work is arranged.
As different from Example 1, present embodiment will be discerned the position of determining ten fingers, adopt example 1 recognition method that difficulty will take place.The left side that now is defined in dotted line among Fig. 5 is the zone of action of left hand, and the right side is the zone of action of the right hand.Regulation first row and secondary series key are the left hand dedicated array of keys, and the 3rd, the 4th classifies right hand dedicated array of keys as, and dotted line overscanning end 2 is parallel to Y-axis when first, second row key is knocked among the figure, and the zone of scanning is the angle from initial direction to dotted line.When the 3rd, the 4th row were knocked, scanning area was the angle of the angle of dotted line to end.Start angle and angle at the end are as Fig. 2.
The method of identification finger is near example 1, and difference is first row and secondary series key when being knocked, and only scans the left hand zone, and four or five fingers of identification left hand when the 3rd row and the 4th row key are knocked, only scan right hand zone, four or five fingers of the identification right hand.
Among Fig. 5, the following character of key is the finger of corresponding respective sequence successively.The corresponding successively left little finger of toe of left hand keypad, a left side is nameless, left middle finger, left forefinger, the corresponding successively RIF of right hand keypad, middle finger, the right third finger, right little finger of toe.
In the present embodiment, mode of operation is quite analogous to the touch system of conventional keyboard, and present embodiment not only reduces the quantity of key, and in fact secondary series and the 3rd row still have a large amount of distributed key assignments, and have reduced probability of errors in the input process.
Fig. 6 compares with Fig. 5 for adopting the character corresponding tables of Macintosh, and secondary series key and the 3rd row key all are omitted.Knocking of " 5 ", " T ", " G ", " B " corresponding left hand thumb, the knocking of " 6 ", " Y ", " H ", the corresponding left hand thumb of " N " key.
Be incorporated herein the definition of Macintosh, above knock to be all click, the first line scanning light only scans a finger, if two or above finger touches are to key, then the first line scanning light can scan 2 or above finger, therefore can give different key assignments.
Fig. 7 is embodiment 3 figure.
5,2,8 is the laser generator scanister; 9,3,7 is position transducer; 61 is base.
Wherein, 5,9 can constitute the identification input generating device; 2,3 can constitute the identification finger apparatus, and 7,8 constitute the move mode device of identification hand.
The light beam of base is promptly supported in 5 generations parallel 61, promptly only produces delegation's scanning light beam.
5 and 61 when placing on the table, because the distance lower (as 1mm) of 5 distances 61, so when regulation finger tapping desktop, other finger is reasonably raised, so light beams of 5 ejaculations, handle the luminous point that digital reflex obtains and detected, trigger the position data (X that once discerns input action and obtain knocking finger by 9
0, Y
0).
In the present embodiment, 2, the 3 identification finger apparatus that constitute determine that finger method roughly the same embodiment 1, example 2 are knocked in the position and the identification of finger.3 can determine the position that each is pointed after 2 scanning light beam was reflected in the present embodiment.During the identification finger, with the position data and the (X of finger
0, Y
0) contrast, the finger that knocks with identification.
In the present embodiment, adopt the method for the regulation both hands zone of action of example 2, the boundary line of zone of action is for to be parallel to Y-axis straight line on the table by 3 subpoints at the key face.Usually be Y-axis.
The light of 5 emissions continue scanning, promptly point when reverberation and are lifted away from desktop, and 9 lose flare, and affirmation equipment enters treats input state, obtain flare once more after, confirm input next time.Otherwise be special state, under special state, do not start 2 scanning light beams, even perhaps start 2 scanning light beam, as the finger of the finger that recognizes and last time identification is same finger, do not confirm input.
Here said moving is meant finger moving before knocking, in rational motion state, the direction of motion and the displacement basically identical at each singlehanded position, therefore can be with a certain finger or the displacement of a certain position displacement as one hand, here, we at first define the position of single finger, our supposition finger in the extremely short time is actionless, as in 1/10 moves, sweep velocity is set, make in per 1/10 second, the scanning that adversary's fingering row is enough scans the position data that we may obtain two edges of each finger each time, enough repeatedly scanning can many group position datas, coordinate is averaged, promptly obtain the finger position data.Another kind method is, gets two marks such as finger ring, is separately fixed on the right-hand man, there is coating on their surface, and scan light is had absorption effect or fluorescent effect, and their position obviously is discernible, they are fixed on the fixed position of finger, with they displacement as the finger displacement.
As described above, certain finger of hand or the position of a part can METHOD FOR CONTINUOUS DETERMINATION, and then its displacement in a short time also is confirmable, in proper order as the foundation of the definition of the move mode of hand.In the present embodiment, adversary's move mode defines, and definable has following several displacement mode, non-displacement, and to top offset, to bottom offset, left, right translation, the big step displacement that makes progress, oblique move etc.
The definition of the move mode of hand is determined along moving direction and displacement that equidirectional moves according to hammer action generation remote holder.
Upwards, downwards, left, implication to the right is obvious, what is called is meant that forward hand moves along Y direction, displacement is greater than rational numerical, as 1-2 centimetre, angular deviation in reasonable range as about 15 degree.Refer to contrary Y-axis, contrary X-axis downwards, left, to the right respectively, move along X-direction that displacement is greater than rational numerical, angular deviation is no more than 15 degree.
Continuous dislocation as 5cm, is the big step displacement that makes progress greater than rational numeral on the direction that makes progress, and the finger angular deviation is the same, and non-displacement is meant displacement less than rational numerical, as 2 centimetres.
Oblique displacement is the shade position of finger direction such as Fig. 8, and displacement is greater than rational numerical, as 2 centimetres.Can define four kinds of directions, upper left, the lower-left, upper right, the bottom right.
It is to be noted that above definition and data regulation is flexibly, decide according to easy grasp.
And above definition mode, be in order to be implanted in the custom of touch system on the conventional keyboard.
When the finger non-displacement knocks, knocking of corresponding left hand little finger of toe, the third finger, middle finger, forefinger, definition corresponding " A ", " S ", " D ", " F " key, corresponding to knocking of right hand forefinger, middle finger, the third finger, little finger of toe, definition corresponding " J ", " K ", " L ", "; " key, when moving to right, knocks left index finger, and corresponding " G " key knocks when right hand forefinger moves to left, corresponding " H " key, promptly non-displacement knocks to add and moves to left, moves to right and knock corresponding conventional keyboard alphabetical keypad second row.When pointing when top offset knocks, corresponding to knocking of left hand little finger of toe, the third finger, middle finger, forefinger, corresponding " Q ", " W ", " E ", " R " key, corresponding to knocking of right hand forefinger, middle finger, the third finger, little finger of toe, definition corresponding " U ", " I ", " O ", " P " key, promptly when top offset knocked, corresponding traditional alphabetical keypad first was got rid of " T ", " Y " key, and " T ", " Y " two keys can tiltedly move and knock correspondence.When hand when bottom offset knocks, corresponding to knocking of left hand little finger of toe, the third finger, middle finger, forefinger, definition corresponding " Z ", " X ", " C ", " V " key, corresponding to knocking of right hand forefinger, middle finger, the third finger, little finger of toe, definition corresponding " M ", "; ", ". ", "/" key, " B ", " N " key can be by oblique displacement correspondences.Promptly knock the next line in corresponding conventional keyboard letter district to bottom offset.
Numerical key on the alphabetical keypad can be corresponding to the big step displacement that makes progress, 10 corresponding 10 numerals of finger.
By above definition mode, 10 numerical keys, 26 letter keys can both obtain corresponding to certain action and finger.
Other major key, as carriage return, space, available aforesaid Macintosh correspondence.
As preceding introduction, do not raise when a certain finger tapping desktop, be made as special state, do not start scanning light beam, therefore finger is when desktop drags, and nonrecognition sense of displacement and displacement are waited to point and moved to suitable position, raise the execution hammer action again, and identification is not judged by accident, otherwise, move on to comfortable position such as finger after, the operation of execution non-displacement will be identified as the operation of displacement.This kind method of operating is similar to mouse and raises desktop, and then puts down, and cursor can not move.
In the present embodiment, be provided with more laser scanning equipment and position transducer, the identification input takes place respectively, knocks the move mode of hand, and knows and knock finger.
In the present embodiment, do not have keyboard, the operator only need pay close attention to and use correct finger and reasonably mobile hand, and needn't make finger aim at a certain key position, according to above-mentioned reasonably define key assignments after, finger knock and move mode is in close proximity to the operating habit of touch system.
Can merge in the example and use some device, can replace 7,8,2,3 as 5,9, certain 5 should be able to adjust scanning angle up and down.
If the position of identification finger can replace mouse with the moving ratio correspondence of finger and moving of cursor continuously.
In the present invention, consider the dirigibility of finger gesture, consider between the finger not only gapped on the direction of X-axis, and gap is also arranged in the position of Y direction, the coordinate of the scanning light spot of same finger on Y-axis is quite approaching, therefore the variation of comparing the Y direction coordinate of scanning light spot also can differentiate finger and other finger, and then discerns.
Simultaneously close up problem, rational finger width data can be set, thereby the finger that will close up is identified as two fingers, and then locate and discern single finger for contingent finger.
The present invention is flexibly to the identification of finger, if a certain finger is fixed, can also be easy to discern and define input value to the finger on its left side and the right so, substitute the device of mouse as the aforementioned, middle finger is as the finger of location, it moves corresponding to the moving of cursor, so knocking of the finger on the middle finger left side can be defined as left click, knocking of the right finger is defined as right click.
The localization method of input of above-described realization key assignments and cursor obviously can shared cover light beam generation and a scanister and a position transducer, available software or hardware setting key assignments import and cursor positioning between switch.
Claims (11)
1, a kind of electronic data input media, be used for the data input or the cursor positioning of electronic equipment, it is characterized by, by following three assemblies separately or unite and constitute, the device that the identification input action takes place, identification is knocked finger and is determined the device of each finger position, the device of the move mode of identification hand, and three assemblies can independent or shared one or several light beam generation and scanister and position transducer.
2, according to claim 1 established data input media, it is characterized by, the identification signal of determining following thus three devices of key assignments or position data is independent or unite definite: key-position signal, the identification signal that finger is knocked in identification, the identification signal of the move mode of identification hand.
3, the device that takes place according to the definite identification input action of claim 1, it is characterized by, can be traditional input equipments such as keyboard, touch-screen, after its key or key position are knocked or are touched, the action of input is once confirmed in beginning, and start scanister and open the program that digital circuit begins once to discern finger, and transmit by the key-position signal of the key of striking to CPU.
4, the identification input action generating means of determining according to claim 1, it is characterized by, can be laser generation and scanister, position transducer or CCD or CMOS composition, laser beam is configured to lower height and is parallel to certain flat scanning, when this plane of finger tapping, after position transducers etc. detect reflected signal, the action of input is once confirmed in beginning, and determine and write down the position data of this finger, and start the program that scanister inspires digital circuit to begin once to discern finger and discern the move mode of hand.
5, the device of finger and definite finger position is knocked in the identification of confirming according to claim 1, it is characterized by, and by one or above laser generation and scanister, position transducer or CMOS or CCD, digital circuit is formed.
6, the digital circuit of confirming according to claim 5, by being characterized as, form by CPU, memory cell and circuit, position transducer, CCD, CMOS are pointed and the variation on direction initialization of the position data of interdigital space of hand, finger position data, the width of finger are analyzed, and compare with the finger position data of knocking that identification input action generating means obtains, knock finger with identification, CPU can use the CPU of the electronic equipment under this device.
7, the move mode device of the identification hand of confirming according to claim 1 is characterized by, take place and scanister by laser, and position transducer or CCD or CMOS, digital circuit is formed.
8, the digital circuit of confirming according to claim 7, it is characterized by, form by CPU memory cell and circuit, to a certain fixed position of the finger that obtains by position transducer etc. or hand or and the attachment position data analyze, to determine the moving direction and the displacement of hand, produce identification signal, the data of determining not consider the Z direction of moving direction and displacement, hammer action does not influence identification signal, and CPU can use the CPU of the electronic equipment under this device.
9, according to claim 5,7 laser of confirming take place and scanister, it is characterized by: form by laser generator, lens, control circuit, CD-ROM drive motor or other driving element, catoptron or refracting telescope, by the pencil laser of its generation through motor or other driving element drive catoptron with beam reflection after two-dimensional scan in following scope, when the finger and palm apart from scanning reflection mirror thoroughly when apart from the time, sweep limit can relate to all fingers of one hand or both hands on a dimension, on a vertical dimension, light beam can be realized line feed scanning in suitable angle
10, the move mode device of the hand of confirming according to claim 1 is characterized by, and can be provided with mark in the fixed position of finger, determines the moving direction and the distance of hand by determining the marker position move mode.
11, the move mode device of the identification hand of determining according to claim 1, it is characterized by, can switch recognition methods, to discern the moving direction and the distance of finger continuously, in order to ratio ground corresponding to cursor positioning, the moving direction and the distance of perhaps discontinuous identification finger are in order to realize the numerical value input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021385491A CN1499343A (en) | 2002-11-04 | 2002-11-04 | Application of finger recognition and action recognition of finger in input tool such as keyboard |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021385491A CN1499343A (en) | 2002-11-04 | 2002-11-04 | Application of finger recognition and action recognition of finger in input tool such as keyboard |
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| CNA021385491A Pending CN1499343A (en) | 2002-11-04 | 2002-11-04 | Application of finger recognition and action recognition of finger in input tool such as keyboard |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100428127C (en) * | 2005-04-26 | 2008-10-22 | 阿尔卑斯电气株式会社 | Input device |
| CN100428123C (en) * | 2005-12-27 | 2008-10-22 | 联想(北京)有限公司 | Information input device of digital equipment |
| CN101038522B (en) * | 2006-03-17 | 2010-05-26 | 鸿富锦精密工业（深圳）有限公司 | Mouse capable of automatically adapting left-right hand |
| CN101847057A (en) * | 2010-06-01 | 2010-09-29 | 郭小卫 | Method for touchpad to acquire input information |
| CN101488042B (en) * | 2008-01-15 | 2011-07-27 | 宏达国际电子股份有限公司 | User interface of portable apparatus and its operation method |
| CN102214009A (en) * | 2010-04-08 | 2011-10-12 | 深圳市闪联信息技术有限公司 | Method and system for implementing keyboard input |
| CN101872263B (en) * | 2009-04-24 | 2013-05-22 | 华硕电脑股份有限公司 | Method for determining mouse instructions by trigger points |
| US8462113B2 (en) | 2008-06-02 | 2013-06-11 | Asustek Computer Inc. | Method for executing mouse function of electronic device and electronic device thereof |
| CN103914240A (en) * | 2012-12-31 | 2014-07-09 | 联想(北京)有限公司 | Method and device for displaying virtual keyboard and electronic device |
| CN101324812B (en) * | 2006-12-19 | 2014-07-23 | 邱波 | Human-machine interactive apparatus, electronic equipment and input method |
| CN107885337A (en) * | 2017-12-20 | 2018-04-06 | 陈瑞环 | A kind of data inputting method and its device based on fingering identification |
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2002
- 2002-11-04 CN CNA021385491A patent/CN1499343A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100428127C (en) * | 2005-04-26 | 2008-10-22 | 阿尔卑斯电气株式会社 | Input device |
| CN100428123C (en) * | 2005-12-27 | 2008-10-22 | 联想(北京)有限公司 | Information input device of digital equipment |
| CN101038522B (en) * | 2006-03-17 | 2010-05-26 | 鸿富锦精密工业（深圳）有限公司 | Mouse capable of automatically adapting left-right hand |
| CN101324812B (en) * | 2006-12-19 | 2014-07-23 | 邱波 | Human-machine interactive apparatus, electronic equipment and input method |
| CN101488042B (en) * | 2008-01-15 | 2011-07-27 | 宏达国际电子股份有限公司 | User interface of portable apparatus and its operation method |
| US8462113B2 (en) | 2008-06-02 | 2013-06-11 | Asustek Computer Inc. | Method for executing mouse function of electronic device and electronic device thereof |
| CN101872263B (en) * | 2009-04-24 | 2013-05-22 | 华硕电脑股份有限公司 | Method for determining mouse instructions by trigger points |
| CN102214009A (en) * | 2010-04-08 | 2011-10-12 | 深圳市闪联信息技术有限公司 | Method and system for implementing keyboard input |
| CN101847057A (en) * | 2010-06-01 | 2010-09-29 | 郭小卫 | Method for touchpad to acquire input information |
| CN103914240A (en) * | 2012-12-31 | 2014-07-09 | 联想(北京)有限公司 | Method and device for displaying virtual keyboard and electronic device |
| CN107885337A (en) * | 2017-12-20 | 2018-04-06 | 陈瑞环 | A kind of data inputting method and its device based on fingering identification |
| CN107885337B (en) * | 2017-12-20 | 2024-03-08 | 陈瑞环 | Information input method and device based on fingering identification |
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