CN103699254A - Method, device and system for multi-point touch positioning - Google Patents
Method, device and system for multi-point touch positioning Download PDFInfo
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- CN103699254A CN103699254A CN201210430716.6A CN201210430716A CN103699254A CN 103699254 A CN103699254 A CN 103699254A CN 201210430716 A CN201210430716 A CN 201210430716A CN 103699254 A CN103699254 A CN 103699254A
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Abstract
The invention provides a method, a device and a system for multi-point touch positioning. The method comprises the following steps of storing at least two continuous history records for each positioning point on a touch screen; according to the continuous history records of each positioning point in the preset time, obtaining the movement track of each touch point; smoothing the movement track of each touch point, and obtaining the corrected movement track of each touch point; converting the corrected movement track of each touch point into the track coordinate information of each touch point; sending the track coordinate information of each touch point to a computer. The method for the multi-point touch positioning has the advantages that the delayed sending, track smoothing and noise elimination functions are realized; the method for the multi-point touch positioning is added between the receiving of positioning signals sent by the touch screen and the processing flow of application software, so the conditions of blind areas, ghost points, and discontinuous touch points of the large-size multi-point touch screen can be effectively eliminated, and the positioning precision of the large-size multi-point touch screen is effectively improved.
Description
Technical field
The invention belongs to field of sensing technologies, relate to a kind of touch localization method and device, particularly relate to a kind of multi-point touch locating method, Apparatus and system.
Background technology
The technology that can be used in the market large scale multiple point touching mainly contains two kinds, and wherein a kind of is multi-point touch panel based on infrared emitting/scanister.Multi-point touch panel based on infrared emitting/scanister mainly relies on and with a definite sequence, is arranged on the some of screen surface surrounding infrared emitting and receiving element are realized to the Scan orientation of touch point.Its Scan orientation principle is: under the control of microcomputer system, connect respectively in a certain order every a pair of infrared emitting and receiving element, whether the infrared ray that detects every a pair of infrared emitting and receiving element is blocked, and with this, has determined whether that touch event occurs.But, when having a plurality of finger touch screen, because infrared ray is by finger blocks, while detecting in contact, there will be blind area, as shown in Figure 1, when the ordinate of contact A and contact B is identical, contact C is because the finger at contact A and B place, contact produces and blocks infrared ray, can only produce correct locating information from a dimension, produce the situation of the elements of a fix inaccurate (being C ' by C location of mistake).Now, the region between vertical coordinate line upper contact A and contact B is blind area (also can become visually blind line); In blind area, because cannot accurately judging finger position (as C position, contact), will produce location of mistake to contact C ', this contact C is called as " terrible point ".Counting of touching on screen is more, occurs that the probability of blind area and " terrible point " is just larger, causes that touch-screen location is inaccurate and the rough situation of touch track is just more.Locate inaccurate and touch track is unsmooth also just means that the precision of touch-screen is not high enough, the touch-screen that positioning precision is not high can have a strong impact on user's Quality of experience in actual applications, thereby has a strong impact on the application prospect of product.
Summary of the invention
The shortcoming of prior art, the object of the present invention is to provide a kind of multi-point touch locating method, Apparatus and system in view of the above, for solving prior art multi-point touch panel, has blind area and terrible point, the problem that positioning precision is not high enough.
For achieving the above object and other relevant objects, the invention provides a kind of multi-point touch locating method, Apparatus and system.
A multi-point touch locating method, described multi-point touch locating method comprises:
For at least 2 the continuous historical records of each anchor point storage on touch-screen;
Continuous historical record according to each anchor point in Preset Time section obtains the movement locus of each contact;
The movement locus of each contact is carried out to the movement locus that smoothing processing obtains the correction of each contact;
The movement locus of the correction of each contact is converted to the trajectory coordinates information of each contact;
The trajectory coordinates information of each contact is sent to computing machine.
Preferably, the corresponding unique ID of the movement locus of each contact; Described ID comprises initial time and reference position and the termination moment and the final position of the movement locus of contact.
Preferably, the movement locus of described each contact is to utilize image tracking algorithm the continuous historical record in Preset Time section calculates and obtains to each anchor point.
Preferably, described historical record comprises at a time touched record of anchor point.
A multiple point touching locating device, described multiple point touching locating device comprises: receiving element, storage unit and processing unit; Described receiving element is in order to receive the positioning signal of each contact on touch-screen; Described storage unit is connected with described receiving element, in order to store the positioning signal of described each contact; Described processing unit comprises: movement locus acquiring unit, smothing filtering unit, coordinate transformation unit; Described movement locus acquiring unit is connected with described storage unit, in order to the positioning signal of each contact in Preset Time section of cell stores is carried out to image, follows the tracks of the movement locus of processing each contact of acquisition; Described smothing filtering unit is connected with described movement locus acquiring unit, in order to the movement locus of each contact is carried out to smoothing processing; Described coordinate transformation unit is connected with described smothing filtering unit, in order to the movement locus of each contact after described smoothing processing is converted to the trajectory coordinates information output of each contact.
A multiple point touching positioning system, described multiple point touching positioning system comprises: touch-screen, multiple point touching locating device and computing machine; Described touch-screen is in order to sense contact position and send the positioning signal of contact; Described multiple point touching locating device is connected with described touch-screen, in order to the positioning signal of the contact of touch-screen output is processed, and the trajectory coordinates information of the movement locus of the correction of acquisition contact; Described computing machine is connected with described multiple point touching locating device, in order to described trajectory coordinates information is sent to application program use.
Preferably, described multiple point touching locating device comprises: receiving element, storage unit and processing unit; Described receiving element is connected with described touch-screen, in order to receive the positioning signal of each contact on touch-screen; Described storage unit is connected with described receiving element, in order to store the positioning signal of described each contact; Described processing unit comprises: movement locus acquiring unit, smothing filtering unit, coordinate transformation unit; Described movement locus acquiring unit is connected with described storage unit, in order to the positioning signal of each contact in Preset Time section of cell stores is carried out to image, follows the tracks of the movement locus of processing each contact of acquisition; Described smothing filtering unit is connected with described movement locus acquiring unit, in order to the movement locus of each contact is carried out to smoothing processing; Described coordinate transformation unit is connected with described smothing filtering unit, in order to the movement locus of each contact after described smoothing processing is converted to the trajectory coordinates information output of each contact.
As mentioned above, multi-point touch locating method of the present invention, Apparatus and system, have following beneficial effect:
The present invention can effectively eliminate large scale multiple spot touch screen blind area, ghost point and the incoherent situation of touch track, effectively improves the positioning precision of large scale multi-touch screen.
Accompanying drawing explanation
Fig. 1 is shown as multi-point touch panel in prior art and occurs a kind of scene schematic diagram that blind area, location and ghost are put.
Fig. 2 is shown as the schematic flow sheet of multi-point touch locating method of the present invention.
Fig. 3 is shown as the schematic diagram of the movement locus of the contact obtaining while there is terrible some situation.
The schematic diagram of the movement locus of the correction of the contact that Fig. 4 obtains while being shown as the terrible some situation of appearance.
Fig. 5 is shown as the structural representation of multiple point touching locating device of the present invention.
Fig. 6 is shown as the structural representation of multiple point touching positioning system of the present invention.
Element numbers explanation
100 multiple point touching locating devices;
110 receiving elements;
120 storage unit;
130 processing units;
131 movement locus acquiring units;
132 smothing filtering unit;
133 coordinate transformation units;
200 touch-screens;
300 computing machines.
Embodiment
Below, by specific instantiation explanation embodiments of the present invention, those skilled in the art can understand other advantages of the present invention and effect easily by the disclosed content of this instructions.The present invention can also be implemented or be applied by other different embodiment, and the every details in this instructions also can be based on different viewpoints and application, carries out various modifications or change not deviating under spirit of the present invention.
Refer to accompanying drawing.It should be noted that, the diagram providing in the present embodiment only illustrates basic conception of the present invention in a schematic way, satisfy and only show with assembly relevant in the present invention in graphic but not component count, shape and size drafting while implementing according to reality, during its actual enforcement, kenel, quantity and the ratio of each assembly can be a kind of random change, and its assembly layout kenel also may be more complicated.
Below in conjunction with embodiment and accompanying drawing, the present invention is described in detail.
Embodiment mono-
The present embodiment provides a kind of multi-point touch locating method, and as shown in Figure 2, described multi-point touch locating method comprises:
For at least 2 the continuous historical records of each anchor point storage on touch-screen.Particularly, described historical record comprises at a time touched record of anchor point.The multi-point touch panel of take based on infrared emitting/scanister is example, and described anchor point refers to by some two the ultrared intersection points that infrared emitting and receiving element are formed that are arranged on screen surface surrounding.
Continuous historical record according to each anchor point in Preset Time section obtains the movement locus of each contact; Particularly, the movement locus of described each contact is to utilize image tracking algorithm the continuous historical record in Preset Time section calculates and obtains to each anchor point.If there is terrible point while locating in contact, the movement locus of the so final contact obtaining there will be situation as shown in Figure 3.
Further, the corresponding unique ID of the movement locus of each contact; Described ID comprises initial time and reference position and the termination moment and the final position of the movement locus of contact.
The movement locus of each contact is carried out to the movement locus that smoothing processing obtains the correction of each contact.The movement locus of the contact shown in Fig. 3 is carried out after smoothing processing, and the movement locus of the correction of acquisition can be as shown in Figure 4.
The movement locus of the correction of each contact is converted to the trajectory coordinates information of each contact.
The trajectory coordinates information of each contact is sent to computing machine.
The invention belongs to field of sensing technologies, can be applicable to the touch input aspect of multimedia computer and large-screen display equipment.Multi-point touch locating method of the present invention has the functions such as delayed delivery, smooth trajectory and noise elimination, send between positioning signal and application software treatment scheme and add multi-point touch locating method of the present invention receiving touch-screen, can effectively eliminate large scale multiple spot touch screen blind area, ghost point and the incoherent situation of touch track, effectively improve the positioning precision of large scale multi-touch screen.
The present invention does not require screen material/size, can be applied to arbitrary dimension display device, and the finger number detecting for needs is restriction not, and it is simple to realize multipoint positioning algorithm, touch point position coordinates convenience of calculation, accurate, reliable, can increase substantially large scale multi-touch screen setting accuracy and experience.
Embodiment bis-
The present embodiment provides a kind of multiple point touching locating device, and as shown in Figure 5, described multiple point touching locating device 100 comprises: receiving element 110, storage unit 120 and processing unit 130.
Described receiving element 110 is in order to receive the positioning signal of each contact on touch-screen.
Described storage unit 120 is connected with described receiving element 110, in order to store the positioning signal of described each contact; Particularly, described storage unit 120 is at least 2 continuous historical records of each anchor point storage.Described historical record comprises at a time touched record of anchor point.The multi-point touch panel of take based on infrared emitting/scanister is example, and described anchor point refers to by some two the ultrared intersection points that infrared emitting and receiving element are formed that are arranged on screen surface surrounding.
Described processing unit 130 comprises: movement locus acquiring unit 131, smothing filtering unit 132, coordinate transformation unit 133.
Described movement locus acquiring unit 131 is connected with described storage unit 120, in order to the positioning signal of each contact in Preset Time section of cell stores is carried out to image, follows the tracks of the movement locus of processing each contact of acquisition.Particularly, the movement locus of described each contact is to utilize image tracking algorithm the continuous historical record in Preset Time section calculates and obtains to each anchor point.When move on screen a plurality of contacts, utilize image tracking algorithm to calculate the movement locus of each contact, to guarantee that all there is own independent, complete movement locus each contact.If there is terrible point while locating in contact, the movement locus of the so final contact obtaining there will be situation as shown in Figure 3.
Further, while thering is the track of a plurality of contacts on screen, the corresponding unique ID of the movement locus of each contact; Described ID comprises initial time and reference position and the termination moment and the final position of the movement locus of contact.
Described smothing filtering unit 132 is connected with described movement locus acquiring unit 131, in order to the movement locus of each contact is carried out to smoothing processing; Particularly, described smothing filtering unit 132 carries out to the movement locus of each contact the movement locus that smoothing processing obtains the correction of each contact.The movement locus of the contact shown in Fig. 3 is carried out after smoothing processing, and the movement locus of the correction of acquisition can be as shown in Figure 4.
Described coordinate transformation unit 133 is connected with described smothing filtering unit 132, in order to the movement locus of each contact after described smoothing processing is converted to the trajectory coordinates information output of each contact.Particularly, described coordinate transformation unit 133 is converted to the movement locus of the correction of each contact the trajectory coordinates information of each contact.
Multiple point touching locating device of the present invention can be made by hardware such as DSP, CPU or FPGA.
Multiple point touching locating device of the present invention has the functions such as delayed delivery, smooth trajectory and noise elimination, it can be arranged between touch-screen and computing machine, make touch-screen send positioning signal was introduced in multiple point touching locating device of the present invention and carries out pre-service before entering application software treatment scheme, large scale multiple spot touch screen blind area, ghost point and the incoherent situation of touch track can be effectively eliminated in this pre-service, effectively improve the positioning precision of large scale multi-touch screen.
Embodiment tri-
The present embodiment provides a kind of multiple point touching positioning system, and as shown in Figure 6, described multiple point touching positioning system comprises: touch-screen 200, multiple point touching locating device 100 and computing machine 300; Described multiple point touching locating device 100 is connected respectively with computing machine 300 with described touch-screen 200, in order to the positioning signal of the contact of touch-screen output is carried out to the processing of the modes such as delayed delivery, smooth trajectory and noise elimination, then sends to computing machine.
Concrete condition is described below:
Described touch-screen 200 is in order to sense contact position and send the positioning signal of contact.
Described multiple point touching locating device 100 comprises: receiving element 110, storage unit 120 and processing unit 130; Described receiving element 110 is in order to receive the positioning signal of each contact on touch-screen; Described storage unit 120 is connected with described receiving element 110, in order to store the positioning signal of described each contact; Described processing unit 130 comprises: movement locus acquiring unit 131, smothing filtering unit 132, coordinate transformation unit 133; Described movement locus acquiring unit 131 is connected with described storage unit 120, in order to the positioning signal of each contact in Preset Time section of cell stores is carried out to image, follows the tracks of the movement locus of processing each contact of acquisition; Described smothing filtering unit 132 is connected with described movement locus acquiring unit 131, in order to the movement locus of each contact is carried out to smoothing processing; Described coordinate transformation unit 133 is connected with described smothing filtering unit 132, in order to the movement locus of each contact after described smoothing processing is converted to the trajectory coordinates information output of each contact.
Described computing machine 300 is connected with described coordinate transformation unit 133, in order to the trajectory coordinates information of each contact is sent to application program use.
Multiple point touching positioning system of the present invention is arranged on the multiple point touching locating device with functions such as delayed delivery, smooth trajectory and noise eliminations between touch-screen and computing machine, make touch-screen send positioning signal was introduced into and in multiple point touching locating device, carries out pre-service before entering application software treatment scheme, large scale multiple spot touch screen blind area, ghost point and the incoherent situation of touch track can be effectively eliminated in this pre-service, effectively improve the positioning precision of large scale multi-touch screen.
When user's finger contacts or object contact are during to touch-screen, the positioning signal of contact can send to multiple point touching locating device, and multiple point touching locating device can store the positioning signal of the contact receiving, but to computing machine, does not send.Wherein the positioning signal of contact comprises correct positioning signal, referring to the contact A in Fig. 1 and contact B, also comprises the positioning signal of mistake, referring to the contact C ' in Fig. 1.When user points generation movement, as contact A has produced movement, block elimination, each contact all obtains new location, and the positioning signal of contact can send to multiple point touching locating device again, and multiple point touching locating device is by the positioning signal storage of new contact.Requirement according to touch-screen to response speed, multiple point touching locating device is at least 2 continuous historical records of each anchor point storage, consider because the probability that probability that the positioning error of generation occurs in general location is less than normal detection is blocked in contact, multiple point touching locating device carries out smoothing processing for the historical track record of each anchor point, as shown in Figures 3 and 4, multiple point touching locating device sends to computing machine by the Grid Track of corrected contact, for application program.
In sum, the present invention has effectively overcome various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all can, under spirit of the present invention and category, modify or change above-described embodiment.Therefore, such as in affiliated technical field, have and conventionally know that the knowledgeable, not departing from all equivalence modifications that complete under disclosed spirit and technological thought or changing, must be contained by claim of the present invention.
Claims (7)
1. a multi-point touch locating method, is characterized in that, described multi-point touch locating method comprises:
For at least 2 the continuous historical records of each anchor point storage on touch-screen;
Continuous historical record according to each anchor point in Preset Time section obtains the movement locus of each contact;
The movement locus of each contact is carried out to the movement locus that smoothing processing obtains the correction of each contact;
The movement locus of the correction of each contact is converted to the trajectory coordinates information of each contact;
The trajectory coordinates information of each contact is sent to computing machine.
2. multi-point touch locating method according to claim 1, is characterized in that: the corresponding unique ID of movement locus of each contact; Described ID comprises initial time and reference position and the termination moment and the final position of the movement locus of contact.
3. multi-point touch locating method according to claim 1, is characterized in that: the movement locus of described each contact is to utilize image tracking algorithm the continuous historical record in Preset Time section calculates and obtains to each anchor point.
4. multi-point touch locating method according to claim 1, is characterized in that: described historical record comprises at a time touched record of anchor point.
5. a multiple point touching locating device, is characterized in that, described multiple point touching locating device comprises:
Receiving element, in order to receive the positioning signal of each contact on touch-screen;
Storage unit, is connected with described receiving element, in order to store the positioning signal of described each contact;
Processing unit, comprising:
Be connected with described storage unit, the positioning signal of each contact in Preset Time section of cell stores carried out to image and follow the tracks of the movement locus acquiring unit of processing the movement locus that obtains each contact;
Be connected with described movement locus acquiring unit, the movement locus of each contact carried out to the smothing filtering unit of smoothing processing;
Be connected with described smothing filtering unit, the movement locus of each contact after described smoothing processing converted to the coordinate transformation unit of the trajectory coordinates information output of each contact.
6. a multiple point touching positioning system, is characterized in that, described multiple point touching positioning system comprises:
Touch-screen, in order to sense contact position and send the positioning signal of contact;
Multiple point touching locating device, is connected with described touch-screen, in order to the positioning signal of the contact of touch-screen output is processed, and the trajectory coordinates information of the movement locus of the correction of acquisition contact;
Computing machine, is connected with described multiple point touching locating device, in order to described trajectory coordinates information is sent to application program use.
7. multiple point touching positioning system according to claim 6, is characterized in that, described multiple point touching locating device comprises:
Receiving element, in order to receive the positioning signal of each contact on touch-screen;
Storage unit, is connected with described receiving element, in order to store the positioning signal of described each contact;
Processing unit, comprising:
Be connected with described storage unit, the positioning signal of each contact in Preset Time section of cell stores carried out to image and follow the tracks of the movement locus acquiring unit of processing the movement locus that obtains each contact;
Be connected with described movement locus acquiring unit, the movement locus of each contact carried out to the smothing filtering unit of smoothing processing;
Be connected with described smothing filtering unit, the movement locus of each contact after described smoothing processing converted to the coordinate transformation unit of the trajectory coordinates information output of each contact.
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| CN201210430716.6A CN103699254A (en) | 2012-11-01 | 2012-11-01 | Method, device and system for multi-point touch positioning |
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| CN201210430716.6A CN103699254A (en) | 2012-11-01 | 2012-11-01 | Method, device and system for multi-point touch positioning |
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| CN104932742A (en) * | 2015-06-05 | 2015-09-23 | 惠州Tcl移动通信有限公司 | Method and system for obtaining multi-point operation tracks of touch screen device |
| CN106648203A (en) * | 2016-09-30 | 2017-05-10 | 上海磐启微电子有限公司 | Smoothing processing algorithm applied to locus touching |
| CN108021289A (en) * | 2015-01-08 | 2018-05-11 | 青岛海信电器股份有限公司 | A kind of response method of touch-screen |
| CN112835463A (en) * | 2019-11-25 | 2021-05-25 | 北京小米移动软件有限公司 | Position coordinate reporting method and device, electronic equipment and storage medium |
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