CN101847057A

CN101847057A - Method for touchpad to acquire input information

Info

Publication number: CN101847057A
Application number: CN201010195788A
Authority: CN
Inventors: 郭小卫
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-06-01
Filing date: 2010-06-01
Publication date: 2010-09-29

Abstract

The invention discloses a method for a touchpad to acquire input information. The method comprises the following steps: acquiring at least one of the induction parameter of the touchpad and the ambient image parameter in the operating area of the touch pad; and determining the input information of the touchpad according to the at least one of the induction parameter of the touchpad and the ambient image parameter as well as the preset identification parameter of the input information. The invention has the following advantages that: by integrating the functions of a mouse, a keyboard and a touch screen with that of the touchpad, the embodiment of the invention can simplify the peripheral connection and enable instructors to easily perform the traditional instructional functions, such as blackboard-writing, drawing and the like, when the touchpad is used for giving instruction, thus achieving the purpose of improving the interactivity.

Description

A kind of method of touchpad to acquire input information

Technical field

The present invention relates to field of human-computer interaction, relate in particular to a kind of method of touchpad to acquire input information.

Background technology

Along with the raising of scientific and technological level, smart machine has become inalienable part in people's productive life.Transmission and exchange message are mainly finished by the human-computer interaction device between people and the smart machine.

The human-computer interaction device mainly comprises input equipment and output device, and corresponding input equipment comprises keyboard, mouse, touch pad and touch-screen, and corresponding output device comprises display and projector; Existing various input equipment all is self-existent equipment in kind, for example mouse, keyboard, touch pad, touch-screen this be self-existent equipment in kind all just.

At present, in the middle of multimedia conferencing or multimedia teaching, the interpretation staff is presented at the viewing area that configures after can using projector equipment that the explanation content is amplified mostly, can both understand the content of being explained so that pay attention to the class personnel visual and clearly, thereby strengthens the explanation effect; In the explanation process, the interpretation staff will finish by the computer that links to each other with projector equipment the operation of displaying contents.

There are the following problems at least in the above prior art:

The first, existing mouse, keyboard, touch pad, touch-screen all are self-existent equipment in kind, if smart machine need use the function of these four kinds of input equipments, just must all be connected to smart machine to these four kinds of input equipments, not only connection procedure is loaded down with trivial details, and connects not only wasting space but also inconvenient moving afterwards;

The second, in the middle of multimedia conferencing or multimedia teaching, existing technology makes the interpretation staff be difficult for realizing instructional functions such as traditional writing on the blackboard, drawing, can only finish writing on the blackboard and drawing by typewriting software on the computer and mapping software, but this mode is compared with drawing with traditional writing on the blackboard very not directly perceived; Again because adopting this mode to carry out writing on the blackboard and when drawing, need computer need carry out frequent software and switch, so greatly reduce interactive with the interpretation staff.

Summary of the invention

The embodiment of the invention provides a kind of method of touchpad to acquire input information, and the function of mouse, keyboard and touch screen functionality and touch pad is combined together, connects thereby simplify peripheral hardware; And can also make the interpretation staff when explaining, easily realize instructional functions such as traditional writing on the blackboard, drawing with this touch pad, reach and improve interactive purpose.

The objective of the invention is to be achieved through the following technical solutions:

A kind of method of touchpad to acquire input information comprises:

Obtain at least one in the ambient image parameter in touch pad sensed parameter and the touchpad operation zone;

According at least one in described touch pad sensed parameter and the described ambient image parameter, and default input information discrimination parameter is determined the input information of touch pad.

Preferably, the type of the input information of described touch pad comprises cursor mobile message, mouse right and left key operation information, handwritten input information and keyboard input information;

Described input information discrimination parameter comprises that input information type discrimination parameter, input information content discrimination parameter and input information finish identification parameter.

Preferably, according at least one in described touch pad sensed parameter and the described ambient image parameter, and default input information discrimination parameter determines that the input information of touch pad comprises following at least one:

According at least one in described touch pad sensed parameter and the described ambient image parameter, and default input information type discrimination parameter determines that touch pad enters cursor mobile message, mouse right and left key operation information, handwritten input information or the keyboard input information pattern obtained;

According at least one in described touch pad sensed parameter and the described ambient image parameter, and default input information content discrimination parameter is determined cursor mobile message, mouse right and left key operation information, handwritten input information or the keyboard input information that touch pad gets access to;

According at least one in described touch pad sensed parameter and the described ambient image parameter, and default input information end identification parameter determines that touch pad withdraws from cursor mobile message, mouse right and left key operation information, handwritten input information or the keyboard input information pattern obtained.

Preferably, described touch pad sensed parameter comprises: the vibration parameters of touch pad, sound wave running parameter, capacitance variations parameter, resistance variations parameter or infrared ray running parameter.

Preferably, described touch pad is provided with sound transducer, in order to obtain the sound wave running parameter of touch pad.

Preferably, described touch pad is provided with vibration transducer, in order to obtain the vibration parameters of touch pad.

Preferably, the ambient image parameter in the described touchpad operation zone comprises touch pad image parameter, images of gestures parameter, objective direction image parameter or object of which movement image parameter.

Preferably, described object of which movement image parameter comprises the movement locus of object image parameter; Determine handwritten input information according to the movement locus of object image parameter.

Preferably, adopt stereovision technique that objective direction image parameter in the ambient image parameter or object of which movement image parameter are calculated, thereby determine the input information of touch pad.

Preferably, the ambient image parameter in the described touchpad operation zone is obtained by camera; The number of described camera is at least one.

As seen from the above technical solution provided by the invention, the method of the touchpad to acquire input information that the embodiment of the invention provides has adopted touch sensible technology and/or video Gesture Recognition, the function of mouse, keyboard and touch screen functionality and touch pad is combined together, connect thereby simplify peripheral hardware; And can also make the interpretation staff when explaining, easily realize instructional functions such as traditional writing on the blackboard, drawing with this touch pad, reach and improve interactive purpose.

Description of drawings

In order to be illustrated more clearly in the technical scheme of the embodiment of the invention, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite of not paying creative work, can also obtain other accompanying drawings according to these accompanying drawings.

The schematic flow sheet of the touchpad to acquire input information method that Fig. 1 provides for the embodiment of the invention;

The application that Fig. 2 provides for the embodiment of the invention structural representation one of input equipment of the method for the invention;

The application that Fig. 3 provides for the embodiment of the invention structural representation two of input equipment of the method for the invention.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described; Obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on embodiments of the invention, those of ordinary skills belong to protection scope of the present invention not making the every other embodiment that is obtained under the creative work prerequisite.

At first, in conjunction with respective drawings, the implementation step of the touchpad to acquire input information method that the embodiment of the invention is provided is done a describe, in general terms.

In conjunction with shown in Figure 1, the concrete steps of the touchpad to acquire input information method that the embodiment of the invention provides are as follows:

Step 11 is obtained at least one in the ambient image parameter in touch pad sensed parameter and the touchpad operation zone;

Wherein, corresponding touch pad sensed parameter can comprise: the vibration parameters of touch pad, sound wave running parameter, capacitance variations parameter, resistance variations parameter or infrared ray running parameter; Corresponding touch pad sensed parameter is used for accurately determining that object (can comprise hand or object that hand is held) contacts or near touch pad (when object is considered as near touch pad during less than preset value apart from the distance of touch pad), perhaps being used to distinguish object is slightly to touch or knock touch pad;

Wherein, the ambient image parameter in the corresponding touchpad operation zone comprises touch pad image parameter, images of gestures parameter, object (can comprise hand or object that hand is held) bearing images parameter or object of which movement (can comprise the motion of hand exercise or object that hand is held) image parameter;

Particularly, the touchpad to acquire input information method that the embodiment of the invention provides comprises the ambient image parameter of only obtaining in the touchpad operation zone, perhaps, obtains the ambient image parameter in touch pad sensed parameter and the touchpad operation zone simultaneously.

Step 12, according at least one in described touch pad sensed parameter and the described ambient image parameter, and default input information discrimination parameter is determined the input information of touch pad;

Wherein, the input information of corresponding touch pad can comprise cursor mobile message, mouse right and left key operation information, handwritten input information and keyboard input information;

Wherein, corresponding input information discrimination parameter comprises that input information type discrimination parameter, input information content discrimination parameter and input information finish identification parameter;

Particularly, according at least one in described touch pad sensed parameter and the described ambient image parameter, and default input information discrimination parameter determines that the input information of touch pad comprises following at least one:

(1) according at least one in described touch pad sensed parameter and the described ambient image parameter, and default input information type discrimination parameter determines that touch pad enters cursor mobile message, mouse right and left key operation information, handwritten input information or the keyboard input information pattern obtained;

Particularly, can comprise at least a in the following scheme:

＜1〉described touch pad sensed parameter is analyzed, if the touch pad sensed parameter after analyzing conforms to a certain type parameter in the input information type discrimination parameter of presetting, then enter and obtain cursor mobile message, mouse right and left key operation information, handwritten input information or keyboard input information pattern accordingly; For example: when object touched touchpad surface, the touch pad sensed parameter of being obtained was a high level, and when object did not contact touchpad surface, the touch pad sensed parameter of being obtained was a low level; The default input information discrimination parameter of touch pad comprises: the touch pad sensed parameter two high level occur and represents that then touch pad enters the cursor mobile message pattern of obtaining in 0.5s; If object is the double touchpad surface that touches in 0.5s, the touch pad sensed parameter of then being obtained produces two high level in 0.5s, promptly enters the cursor mobile message pattern of obtaining;

＜2〉to the ambient image parameter in the touchpad operation zone transform, processing such as denoising, rectification, binaryzation, ambient image parameter after will handling again is analyzed with the input information discrimination parameter of presetting, if analysis result shows the ambient image parameter after the processing and conforms to a certain type parameter in the default input information discrimination parameter that then touch pad enters and obtains cursor mobile message, mouse right and left key operation information, handwritten input information or keyboard input information pattern accordingly; For example the default input information discrimination parameter of touch pad comprises: left hand is clenched fist in the scope of distance touch pad 1CM and is represented that touch pad enters the cursor mobile message pattern of obtaining, so, if show in the described touch pad sensed parameter in the scope apart from touch pad 1CM object arranged, further analyzing this object by the ambient image parameter after handling again is the left hand that is in the state of clenching fist, and then touch pad enters the cursor mobile message pattern of obtaining;

Need to prove, touch pad can be with the images of gestures parameter in the ambient image parameter, objective direction image parameter or object of which movement image parameter as default input information discrimination parameter, that is to say, entering the pattern of obtaining a certain category information may only need object is moved on to a certain orientation, perhaps only need one or several certain gestures, also might only need one or several action; Wherein, each gesture and action may need to continue the regular hour, may be provided with certain interval time between each gesture and action.Above-mentioned example only is a kind of scheme of obtaining cursor mobile message pattern that enters, and the scheme that enters of other implementation and other type-scheme is similar with it, repeats no more herein.

(2) according at least one in described touch pad sensed parameter and the described ambient image parameter, and default input information content discrimination parameter is determined the input information that touch pad gets access to;

(3) according at least one in described touch pad sensed parameter and the described ambient image parameter, and default input information end identification parameter determines that touch pad withdraws from cursor mobile message, mouse right and left key operation information, handwritten input information or the keyboard input information pattern obtained; Its specific implementation is similar to (1), repeats no more herein

In technique scheme, according at least one in described touch pad sensed parameter and the described ambient image parameter, and default input information content discrimination parameter determines that the specific embodiments of the input information that touch pad gets access to is different according to the difference of input information type; Below this scheme is described respectively according to these several input information types of cursor mobile message, mouse right and left key operation information, handwritten input information and keyboard input information.

(1) cursor mobile message

At least one according in described touch pad sensed parameter and the described ambient image parameter, and default input information content discrimination parameter to determine that the specific embodiments of the cursor mobile message that touch pad gets access to comprises following at least a:

Scheme one: touch pad enter obtain cursor mobile message pattern after, can adopt the motion vector of at least a definite object in the following dual mode:

(1) follows the tracks of the ambient image parameter of obtaining in the touchpad operation zone, then to described ambient image parameter transform in real time, processing such as denoising, rectification, binaryzation, again the object of which movement image parameter in the ambient image parameter after handling is carried out motion detection, motion tracking and estimation according to the front and back frame sequential, thereby determine the motion vector of object according to handling back object of which movement image parameter;

(2) utilize at least two cameras to follow the tracks of the ambient image parameter of obtaining in the touchpad operation zone, (so-called stereovision technique is meant and utilizes two or more cameras that are arranged at diverse location to take same width of cloth scene to adopt stereovision technique again, again by calculating the parallax of a certain spatial point in multiple image, determine the D coordinates value of this point) objective direction image parameter in the ambient image parameter or object of which movement image parameter are calculated, thereby calculate the locus of the relative touchpad surface of object, and further determine the motion vector of object according to the spatial position change of the relative touchpad surface of object;

After determining the motion vector of object, further determine cursor mobile message on the display device according to the motion vector of object; Operating personnel can adjust the motion of object in the touchpad operation zone according to the situation of movement of cursor on the display device, the then continuous real-time follow-up of touch pad obtains the motion vector of object, cursor moves on the step of the going forward side by side joint display device, arrive the target location up to cursor and so forth, operating personnel withdraw from the cursor mobile message pattern of obtaining.

Scheme two: in the touchpad operation zone on the coordinate of every bit and the display device in the specific region coordinate of every bit corresponding; Touch pad enter obtain cursor mobile message pattern after, can adopt at least a in the following dual mode to determine the object contact or near the coordinate in touchpad operation zone:

(1) if determines object contact or near touch pad according to the touch pad sensed parameter of being obtained, then obtain the ambient image parameter in the touchpad operation zone immediately, and to described ambient image parameter transform in real time, processing such as denoising, rectification, binaryzation; Then, determine the object contact according to the touch pad image parameter in the ambient image parameter after handling or near the coordinate in touchpad operation zone;

(2) utilize at least two cameras to follow the tracks of the ambient image parameter of obtaining in the touchpad operation zone, adopt stereovision technique that objective direction image parameter in the ambient image parameter or object of which movement image parameter are calculated again, thereby calculate object contact or near the coordinate in touchpad operation zone:

After determining object contact or coordinate, convert it to the respective coordinates point on the display device near the touchpad operation zone; Smart machine can directly move to the relevant position with the cursor on the display device after getting access to described respective coordinates point, also can only show a pattern identification in the relevant position, and cursor not moved to the relevant position; Whether operating personnel can arrive the target location according to cursor position on the display device or pattern identification position judgment, if do not arrive the target location, then continue the contact point in adjustment and touchpad operation zone, and then adjust the respective coordinates point on the display device; If the arrival target location then moves to the target location with cursor, and the pattern identification that clears all, and then withdraw from the cursor mobile message pattern of obtaining; Operating personnel more accurately determine the coordinate position on the display device for convenience, an attached display device that the viewing area is identical with the touchpad operation area size can be set, and it is consistent with the displaying contents of main display device specific region to make it displaying contents below transparent or semitransparent plate touch pad; Also the displaying contents of display device specific region can be projected to touchpad operation zone (view field can overlap fully with the touchpad operation zone), and then handled easily personnel's operation.

Need to prove, in order to improve the degree of accuracy of utilizing stereovision technique to calculate the object space coordinate, can grid tag be set in touchpad surface, also can a plurality of positions be installed by secondary light source (for example, can be infrarede emitting diode LED) etc. at touchpad surface, inside, the back side etc.

For the content, purpose and the advantage that make technique scheme is clearer, be described in detail below by example.

Embodiment one

As shown in Figure 2, a kind of touch pad that adopts the described method of the embodiment of the invention, its concrete structure comprises: touch pad 1, camera 2, projector 3 and support 4; Described projector 3 is arranged on the support 4 with surface level with forming an angle, and described camera 2, and is arranged on the support at 40cm place, touch pad 1 top as camera watch region with touch pad 1; Described projector 3, and is arranged on the support at 40cm place, touch pad 1 top as view field with touch pad 1; The surface of described touch pad 1 also is provided with electric capacity perception film, so that perceptual object is near to or in contact with touch pad 1.

Suppose that this touch pad 1 preset following information:

Input information type discrimination parameter comprises: hand thumb and forefinger stretch out L-shaped and all the other fingers curl represents that promptly touch pad 1 enters the cursor mobile message pattern of obtaining;

Input information finishes identification parameter and comprises: the right hand only forefinger stretches out and all the other fingers expression touch pad 1 that all curls withdraws from the cursor mobile message pattern of obtaining;

So, as shown in Figure 1, the concrete steps that this touch pad 1 obtains the cursor mobile message are as follows:

Step 12, according at least one in described touch pad sensed parameter and the described ambient image parameter, and default input information discrimination parameter is determined the input information of touch pad 1;

Particularly, to the ambient image parameter of being obtained transform, processing such as denoising, rectification, binaryzation, if the ambient image parameter after handling comprises a hand thumb and forefinger stretches out images of gestures L-shaped and that all the other fingers curl, promptly conform to, then enter the cursor mobile message pattern of obtaining with the input information type discrimination parameter of presetting;

Enter obtain cursor mobile message pattern after, if slide in touch pad 1 surface of the forefinger finger tip of the right hand in the touchpad operation zone, then camera 2 is followed the tracks of the ambient image parameter of obtaining in the touchpad operation zone, then described ambient image parameter is transformed in real time, denoising, correct, processing such as binaryzation, again the object of which movement image parameter in the ambient image parameter after handling is carried out motion detection according to the front and back frame sequential, motion tracking and estimation, thereby determine the motion vector of object, and further the cursor on the display device is moved according to corresponding motion vector; Up to moving to the target location.

After cursor moves to the target location, change right hand gesture, if picking out after treatment, the ambient image parameter of being obtained comprises the right hand images of gestures that only forefinger stretches out and all the other fingers all curl, then withdraw from the cursor mobile message pattern of obtaining.

As seen, the realization of the embodiment of the invention combines the function of mouse function and touch pad together, connects thereby simplify peripheral hardware; And can also make the interpretation staff when explaining, easily realize instructional functions such as traditional writing on the blackboard, drawing with this touch pad, reach and improve interactive purpose.

Embodiment two

As shown in Figure 2, a kind of touch pad that adopts the described method of the embodiment of the invention, its concrete structure comprises: touch pad 1, camera 2, projector 3 and support 4; Described projector 3 is arranged on the support 4 with surface level with forming an angle, and described camera 2, and is arranged on the support at 40cm place, touch pad 1 top as camera watch region with touch pad 1; Described projector 3, and is arranged on the support at 40cm place, touch pad 1 top as view field with touch pad 1; Be provided with sound transducer (for example, can be microphone) below the described touch pad 1, so that perceptual object knocks touch pad 1.

The coordinate of every bit is corresponding on the coordinate of supposing every bit in the touchpad operation zone of this touch pad 1 and the display device, and this touch pad 1 has been preset following information:

Input information type discrimination parameter comprises: object knocks touch pad 1 and represents that promptly touch pad 1 enters the cursor mobile message pattern of obtaining;

Input information finishes identification parameter and comprises: knock twice touch pads 1 continuously and represent that promptly touch pad 1 withdraws from the cursor mobile message pattern of obtaining in 0.5s;

Particularly, after operating personnel knocked touch pad 1, the sound transducer of touch pad 1 got access to corresponding touch pad sensed parameter, and described touch pad sensed parameter and default input information type discrimination parameter are compared, if conform to, then enter the cursor mobile message pattern of obtaining;

Enter obtain cursor mobile message pattern after, projector 3 projects to the operating area of touch pad 1 with the displaying contents of main display device, and view field overlaps fully with the touchpad operation zone; Because the displaying contents of main display device is consistent with the project content in touchpad operation zone, so when operating personnel wanted that cursor moved to a certain position, the relevant position that need knock the touchpad operation zone got final product; Behind the relevant position of knocking the touchpad operation zone, touch pad 1 gets access to corresponding touch pad sensed parameter, then camera 2 obtains the ambient image parameter in the touchpad operation zone immediately, and to described ambient image parameter transform in real time, processing such as denoising, rectification, binaryzation; Then, determine the coordinate that object knocks the touchpad operation zone according to the touch pad image parameter in the ambient image parameter after handling, and then convert it to respective coordinates point on the main display device, and cursor is moved to described corresponding coordinate point, promptly finish and obtain the cursor mobile message;

When operating personnel knock twice touch pads 1 continuously in 0.5s after, the sound transducer of touch pad 1 gets access to corresponding touch pad sensed parameter, described touch pad sensed parameter and the input information of presetting are finished identification parameter to be compared, if conform to, then withdraw from the cursor mobile message pattern of obtaining.

Embodiment three

As shown in Figure 3, a kind of touch pad that adopts the described method of the embodiment of the invention, its concrete structure comprises: touch pad 1, high-order camera 21, low level camera 22, support 4 and sound transducer 5; Described sound transducer 5 is arranged at the bottom of support 4, and described high-order camera 21 and low level camera 22 are arranged at the upper and lower of support 4 same sides respectively, and described support 4 is arranged on the touch pad 1; Described touch pad 1 can be desktop.

Suppose that this touch pad 1 preset following information:

Input information type discrimination parameter comprises: the distance of object and touch pad 1 is not more than 5cm and represents that promptly touch pad 1 enters the cursor mobile message pattern of obtaining;

Input information finishes identification parameter and comprises: the distance of object and touch pad 1 represents promptly that greater than 5cm touch pad 1 withdraws from the cursor mobile message pattern of obtaining;

Particularly, utilize high-order camera 21 and low level camera 22 to follow the tracks of the ambient image parameter of obtaining in the touchpad operation zone simultaneously;

Particularly, utilize objective direction image parameter or object of which movement image parameter in the ambient image parameter that stereovision technique obtained high-order camera 21 and low level camera 22 to calculate, thereby calculate the parallax of object, and the volume coordinate of definite object in high-order ambient image parameter and low level ambient image parameter; If the distance of object and touch pad 1 is not more than 5cm, then enter the cursor mobile message pattern of obtaining;

Enter obtain cursor mobile message pattern after, high-order camera 21 and low level camera 22 real-time follow-ups obtain the ambient image parameter in the touchpad operation zone, adopt stereovision technique to calculate again according to objective direction image parameter in the ambient image parameter in the touchpad operation zone or object of which movement image parameter, thereby calculate the locus of the relative touchpad surface of object, and further determine the motion vector of object according to the spatial position change of the relative touchpad surface of object; Then described motion vector is converted to the correspondence position on the main display device, and shows a forefinger icon indicia at described correspondence position; The user determines by observing the forefinger icon indicia whether this position is the target location, if not the target location, then continues the contact point in adjustment and touchpad operation zone, and then adjusts the respective coordinates point on the display device; If the arrival target location then moves to cursor this position, and the forefinger icon indicia that clears all, promptly finish and obtain the cursor mobile message;

Utilize objective direction image parameter or object of which movement image parameter in the ambient image parameter that stereovision technique obtained high-order camera 21 and low level camera 22 to calculate, thereby calculate the parallax of object, and the volume coordinate of definite object in high-order ambient image parameter and low level ambient image parameter; If the distance of object and touch pad 1, then withdraws from the cursor mobile message pattern of obtaining greater than 5cm.

(2) mouse right and left key operation information

According at least one in described touch pad sensed parameter and the described ambient image parameter, and default input information content discrimination parameter determines that the specific embodiments of the mouse right and left key operation information that touch pad gets access to comprises following at least a:

Scheme one: touch pad enter obtain mouse right and left key operation information pattern after, leave behind the object contact touch pad or object knocks touch pad if analyze according to the touch pad sensed parameter obtained, then obtain object and leave touch pad constantly or knock ambient image parameter in the touch pad touchpad operation zone constantly, then to described ambient image parameter transform in real time, processing such as denoising, rectification, binaryzation, the images of gestures parameter in the ambient image parameter after will handling again compares with default input information content discrimination parameter; If described images of gestures parameter is consistent with left mouse button operating parameter in the input information content discrimination parameter of presetting, then determine the smart machine execution left button operation that is attached thereto; If described images of gestures parameter is consistent with right mouse button operating parameter in the input information content discrimination parameter of presetting, then determine the smart machine execution right button operation that is attached thereto.

Scheme two: touch pad enter obtain mouse right and left key operation information pattern after, when determining object contact according to the touch pad sensed parameter or rising during near touch pad, ambient image parameter in the touchpad operation zone is obtained in beginning in real time, and in real time to described ambient image parameter transform in real time, Treatment Analysis such as denoising, rectification, binaryzation; If determine that according to the images of gestures parameter in the ambient image parameter after handling described object is for keeping the hand of certain gestures, and holding time has reached Preset Time, and the images of gestures parameter in the ambient image parameter after then will handling compares with the input information content discrimination parameter of presetting; If described images of gestures parameter is consistent with left mouse button operating parameter in the input information content discrimination parameter of presetting, then determine the smart machine execution left button operation that is attached thereto; If described images of gestures parameter is consistent with right mouse button operating parameter in the input information content discrimination parameter of presetting, then determine the smart machine execution right button operation that is attached thereto.

Scheme three; Mouse right and left key operation information obtains by such scheme one or scheme two respectively.

Embodiment four

Suppose that this touch pad 1 preset following information:

Input information type discrimination parameter comprises: the right hand only forefinger stretches out and all the other fingers all curl and represent that promptly touch pad 1 enters the mouse right and left key operation information pattern of obtaining;

Input information content discrimination parameter comprises: right hand forefinger knocks a touch pad and promptly represents the left mouse button operation;

Right hand middle finger knocks a touch pad and promptly represents the right mouse button operation;

Input information finishes identification parameter and comprises: the right hand is clenched fist and is represented that touch pad 1 withdraws from the mouse right and left key operation information pattern of obtaining;

So, as shown in Figure 1, the concrete steps that this touch pad 1 obtains mouse right and left key operation information are as follows:

Particularly, to the ambient image parameter of being obtained transform, processing such as denoising, rectification, binaryzation, if the ambient image parameter after handling comprises the right hand images of gestures that only forefinger stretches out and all the other fingers all curl, promptly conform to, then enter the mouse right and left key operation information pattern of obtaining with the input information type discrimination parameter of presetting;

Enter obtain mouse right and left key operation information pattern after, knock touch pad 1 if analyze object according to the touch pad sensed parameter of obtaining, then camera 2 obtains object immediately and knocks ambient image parameter in the touch pad touchpad operation zone constantly, then to described ambient image parameter transform in real time, processing such as denoising, rectification, binaryzation, the images of gestures parameter in the ambient image parameter after will handling again compares with default input information content discrimination parameter; If described images of gestures parameter is knocked touch pad one time for right hand forefinger, promptly consistent with left mouse button operating parameter in the input information content discrimination parameter of presetting, then determine the smart machine execution left button operation that is attached thereto; If described images of gestures parameter is knocked touch pad one time for right hand middle finger, promptly consistent with right mouse button operating parameter in the input information content discrimination parameter of presetting, then determine the smart machine execution right button operation that is attached thereto.

To the ambient image parameter of being obtained transform, processing such as denoising, rectification, binaryzation, if the ambient image parameter after handling comprises the images of gestures that a right hand is clenched fist, promptly finish identification parameter and conform to, then withdraw from the mouse right and left key operation information pattern of obtaining with the input information of presetting.

Embodiment five

Suppose that this touch pad 1 preset following information:

Input information content discrimination parameter comprises: the right hand only forefinger stretches out and keeps 1s and promptly represent the left mouse button operation;

The right hand only middle finger stretches out and keeps 1s and promptly represent the right mouse button operation;

Particularly, after operating personnel knock touch pad 1, the sound transducer of touch pad 1 gets access to corresponding touch pad sensed parameter, described touch pad sensed parameter and the input information type discrimination parameter of presetting are compared, if conform to, then enter the mouse right and left key operation information pattern of obtaining;

Enter obtain mouse right and left key operation information pattern after, camera 2 obtains the ambient image parameter in the touchpad operation zone immediately, and to described ambient image parameter transform in real time, processing such as denoising, rectification, binaryzation; If according to the images of gestures parameter in the ambient image parameter after handling determine the right hand only forefinger stretch out and keep 1s, promptly conform to the left mouse button operation, determine that then the smart machine that is attached thereto carries out the left button operation; If according to the images of gestures parameter in the ambient image parameter after handling determine the right hand only middle finger stretch out and keep 1s, promptly conform to the right mouse button operation, determine that then the smart machine that is attached thereto carries out the right button operation.

When operating personnel knock twice touch pads 1 continuously in 0.5s after, the sound transducer of touch pad 1 gets access to corresponding touch pad sensed parameter, described touch pad sensed parameter and the input information of presetting are finished identification parameter to be compared, if conform to, then withdraw from the mouse right and left key operation information pattern of obtaining.

(3) handwritten input information

At least one according in described touch pad sensed parameter and the described ambient image parameter, and default input information content discrimination parameter to determine that the specific embodiments of the handwritten input information that touch pad gets access to comprises following at least a:

Scheme one: touch pad enter obtain the handwritten input information pattern after, can adopt the motion vector of at least a definite object in following several scheme:

(1) when object touches touchpad surface, the touch pad sensed parameter of being obtained is a high level, and when object did not contact touchpad surface, the touch pad sensed parameter of being obtained was a low level; Obtain the ambient image parameter in the touchpad operation zone in real time, and in real time to described ambient image parameter transform, processing such as denoising, rectification, binaryzation, again the object of which movement image parameter in the ambient image parameter after handling is carried out motion detection, motion tracking and estimation according to the front and back frame sequential, thereby determine the motion vector of object according to handling back object of which movement image parameter;

(2) utilize at least two cameras to follow the tracks of the ambient image parameter of obtaining in the touchpad operation zone, adopt stereovision technique that objective direction image parameter in the ambient image parameter or object of which movement image parameter are calculated again, thereby calculate the locus of the relative touchpad surface of object, and further determine the motion vector of object according to the spatial position change of the relative touchpad surface of object;

After determining the motion vector of object, further determine cursor mobile message on the display device according to the motion vector of object; When described touch pad sensed parameter is high level; on display device, the current motion track of cursor is drawn lines; when described touch pad sensed parameter is high level, does not draw lines at display device on moving cursor, thereby reach the purpose of obtaining handwritten input information.

Scheme two: in the touchpad operation zone on the coordinate of every bit and the display device coordinate of the every bit of specific region corresponding; Touch pad enter obtain the handwritten input information pattern after, can adopt the motion vector of at least a definite object in following several scheme:

(1) when object touches touchpad surface, the touch pad sensed parameter of being obtained is a high level, and when object did not contact touchpad surface, the touch pad sensed parameter of being obtained was a low level; When the touch pad sensed parameter of being obtained is high level, obtain the ambient image parameter in the touchpad operation zone immediately, and to described ambient image parameter transform in real time, processing such as denoising, rectification, binaryzation; Then, determine the coordinate in object contact touchpad operation zone according to the touch pad image parameter in the ambient image parameter after handling;

Behind the coordinate of determining object contact touchpad operation zone, convert it to the respective coordinates point on the display device, and on described respective coordinates point, draw lines, when the touch pad sensed parameter of being obtained is left intact during for low level, thereby reach the purpose of obtaining handwritten input information; Operating personnel more accurately determine the coordinate position on the display device for convenience, an attached display device that the viewing area is identical with the touchpad operation area size can be set, and it is consistent with the displaying contents of main display device to make it displaying contents below transparent or semitransparent plate touch pad; Also the displaying contents of display device can be projected to touchpad operation zone (view field can overlap fully with the touchpad operation zone), and then handled easily personnel's operation.

Embodiment six

Suppose that this touch pad 1 preset following information:

Input information type discrimination parameter comprises: the right hand only forefinger stretches out and all the other fingers all curl and represent that promptly touch pad 1 enters the handwritten input information pattern of obtaining;

Input information finishes identification parameter and comprises: the right hand is clenched fist and is represented that touch pad 1 withdraws from the handwritten input information pattern of obtaining;

So, as shown in Figure 1, the concrete steps that this touch pad 1 obtains handwritten input information are as follows:

Particularly, to the ambient image parameter of being obtained transform, processing such as denoising, rectification, binaryzation, if the ambient image parameter after handling comprises the right hand images of gestures that only forefinger stretches out and all the other fingers all curl, promptly conform to, then enter the handwritten input information pattern of obtaining with the input information type discrimination parameter of presetting;

Touch pad 1 enter obtain handwritten input information after, when object touched touchpad surface, the touch pad sensed parameter of being obtained was a high level, when object did not contact touchpad surface, the touch pad sensed parameter of being obtained was a low level; Obtain the ambient image parameter in the touchpad operation zone in real time, and in real time to described ambient image parameter transform, processing such as denoising, rectification, binaryzation, again the object of which movement image parameter in the ambient image parameter after handling is carried out motion detection, motion tracking and estimation according to the front and back frame sequential, thereby determine the motion vector of object according to handling back object of which movement image parameter, and further determine the cursor mobile message on the display device; When described touch pad sensed parameter is high level; on display device, the current motion track of cursor is drawn lines; when described touch pad sensed parameter is high level, does not draw lines at display device on moving cursor, thereby reach the purpose of obtaining handwritten input information.

To the ambient image parameter of being obtained transform, processing such as denoising, rectification, binaryzation, if the ambient image parameter after handling comprises the images of gestures that a right hand is clenched fist, promptly finish identification parameter and conform to, then withdraw from the handwritten input information pattern of obtaining with the input information of presetting.

As seen, the realization of the embodiment of the invention combines the function of touch screen functionality and touch pad together, connects thereby simplify peripheral hardware; And can also make the interpretation staff when explaining, easily realize instructional functions such as traditional writing on the blackboard, drawing with this touch pad, reach and improve interactive purpose.

Embodiment seven

As shown in Figure 2, a kind of touch pad that adopts the described method of the embodiment of the invention, its concrete structure comprises: touch pad 1, camera 2, projector 3 and support 4; Described projector 3 is arranged on the support 4 with surface level with forming an angle, and described camera 2, and is arranged on the support at 40cm place, touch pad 1 top as camera watch region with touch pad 1; Described projector 3, and is arranged on the support at 40cm place, touch pad 1 top as view field with touch pad 1; Be provided with sound transducer below the described touch pad 1, so that perceptual object contacts or knock touch pad 1.

Suppose that this touch pad 1 preset following information:

Input information type discrimination parameter comprises: object knocks touch pad 1 and represents that promptly touch pad 1 enters the handwritten input information pattern of obtaining;

Input information finishes identification parameter and comprises: knock twice touch pads 1 continuously and represent that promptly touch pad 1 withdraws from the handwritten input information pattern of obtaining in 0.5s;

Particularly, after operating personnel knocked touch pad 1, the sound transducer of touch pad 1 got access to corresponding touch pad sensed parameter, and described touch pad sensed parameter and default input information type discrimination parameter are compared, if conform to, then enter the handwritten input information pattern of obtaining;

In the touchpad operation zone on the coordinate of every bit and the display device coordinate of every bit corresponding; Touch pad 1 enter obtain handwritten input information after, when object touched touchpad surface, the touch pad sensed parameter of being obtained was a high level, when object did not contact touchpad surface, the touch pad sensed parameter of being obtained was a low level; When the touch pad sensed parameter of being obtained is high level, obtain the ambient image parameter in the touchpad operation zone immediately, and to described ambient image parameter transform in real time, processing such as denoising, rectification, binaryzation; Then, determine the coordinate in object contact touchpad operation zone according to the touch pad image parameter in the ambient image parameter after handling, and then convert it to respective coordinates point on the display device, and on described respective coordinates point, draw lines, when the touch pad sensed parameter of being obtained is left intact during for low level, thereby reach the purpose of obtaining handwritten input information.

When operating personnel knock twice touch pads 1 continuously in 0.5s after, the sound transducer of touch pad 1 gets access to corresponding touch pad sensed parameter, described touch pad sensed parameter and the input information of presetting are finished identification parameter to be compared, if conform to, then withdraw from the handwritten input information pattern of obtaining.

(4) keyboard input information

At least one according in described touch pad sensed parameter and the described ambient image parameter, and default input information content discrimination parameter to determine that the specific embodiments of the keyboard input information that touch pad gets access to comprises following at least a:

Scheme one: each button that is marked with keyboard on the touch pad, touch pad enter obtain the keyboard input information pattern after, obtain the ambient image parameter in the touchpad operation zone, and to described ambient image parameter transform in real time, processing such as denoising, rectification, binaryzation; Carry out following several processing procedure then:

＜1〉determines the particular location of each button according to the touch pad image parameter in the ambient image parameter after handling;

＜2〉carry out motion detection, motion tracking and estimation according to the object of which movement image parameter in the ambient image parameter after handling (actual object is finger) according to the front and back frame sequential, thereby determine finger motion locus;

＜3〉when object touches touchpad surface, the touch pad sensed parameter of being obtained is a high level, and when object did not contact touchpad surface, the touch pad sensed parameter of being obtained was a low level; Obtain the pulse signal of touch pad sensed parameter, and be the center, intercept above-mentioned finger motion locus in the time cycle with the hold time pulse signal of enough little (reach a certain preset value, but do not have) of a high level; Then the finger motion locus that is intercepted is analyzed, in conjunction with the particular location of each button, the button that object triggered is constantly taken place again, reach the purpose of obtaining keyboard input information thereby determine high level.

Scheme two: touch pad enter obtain the keyboard input information pattern after, obtain the ambient image parameter in the touchpad operation zone, and to described ambient image parameter transform in real time, processing such as denoising, rectification, binaryzation; The position calculation that is placed on the touch pad with specific finger goes out the reference key position of QWERTY keyboard, and estimates the position of other buttons according to the key arrangement of QWERTY keyboard; Carry out following several processing procedure then:

＜1〉carries out motion detection, motion tracking and estimation according to the object of which movement image parameter in the ambient image parameter after handling (actual object is finger) according to the front and back frame sequential, thereby determine finger motion locus;

＜2〉when object touches touchpad surface, the touch pad sensed parameter of being obtained is a high level, and when object did not contact touchpad surface, the touch pad sensed parameter of being obtained was a low level; Obtain the pulse signal of touch pad sensed parameter, and be the center, intercept above-mentioned finger motion locus in the time cycle with the hold time pulse signal of enough little (reach a certain preset value, but do not have) of a high level; By the finger motion locus that is intercepted is analyzed, determine high level in conjunction with the position of each button again the button that is triggered takes place to point constantly, reach the purpose of obtaining keyboard input information.

Scheme three: touch pad enter obtain the keyboard input information pattern after, demonstrate a keyboard pattern on the display device, obtain the ambient image parameter in the touchpad operation zone, and to described ambient image parameter transform in real time, processing such as denoising, rectification, binaryzation, determine the corresponding relation of finger position and keyboard according to the object of which movement image parameter in the ambient image parameter after handling (actual object is finger) then, and on display device, demonstrate keyboard pattern and finger position pattern simultaneously; Operating personnel determine the correspondence position of target button on touch pad according to the present finger present position that shows on the display device, click the relevant position then; Real-time follow-up obtains the object of which movement image parameter, and then obtain finger motion locus, carry out following processing procedure simultaneously: when object touches touchpad surface, the touch pad sensed parameter of being obtained is a high level, when object did not contact touchpad surface, the touch pad sensed parameter of being obtained was a low level; Obtain the pulse signal of touch pad sensed parameter, and be the center, intercept above-mentioned finger motion locus in the time cycle with the hold time pulse signal of enough little (reach a certain preset value, but do not have) of a high level; By the finger motion locus that is intercepted is analyzed, determine high level in conjunction with the position of each button on the display device again the button that is triggered takes place to point constantly, reach the purpose of obtaining keyboard input information.

Because the above-mentioned technical scheme of obtaining keyboard input information, the finger motion process is too complicated, and institute thinks improves the accuracy rate that keystroke is discerned, and is preferably in and uses perception touch and perception to knock two kinds of technology on the touch pad simultaneously; For the content, purpose and the advantage that make technique scheme is clearer, be described in detail below by example.

Embodiment eight

As shown in Figure 2, a kind of touch pad that adopts the described method of the embodiment of the invention, its concrete structure comprises: touch pad 1, camera 2, projector 3 and support 4; Described projector 3 is arranged on the support 4 with surface level with forming an angle, and described camera 2, and is arranged on the support at 40cm place, touch pad 1 top as camera watch region with touch pad 1; Described projector 3, and is arranged on the support at 40cm place, touch pad 1 top as view field with touch pad 1; The surface of described touch pad 1 also is provided with electric capacity perception film, so that perceptual object is near to or in contact with touch pad 1; Be provided with sound transducer below the described touch pad 1.

Suppose that this touch pad 1 preset following information:

Input information type discrimination parameter comprises: object knocks touch pad 1 and represents that promptly touch pad 1 enters the keyboard input information pattern of obtaining;

Input information finishes identification parameter and comprises: knock twice touch pads 1 continuously and represent that promptly touch pad 1 withdraws from the keyboard input information pattern of obtaining in 0.5s;

So, as shown in Figure 1, the concrete steps that this touch pad 1 obtains keyboard input information are as follows:

Particularly, after operating personnel knocked touch pad 1, the sound transducer of touch pad 1 got access to corresponding touch pad sensed parameter, and described touch pad sensed parameter and default input information type discrimination parameter are compared, if conform to, then enter the keyboard input information pattern of obtaining;

Be marked with each button of keyboard on the touch pad 1, touch pad enter obtain the keyboard input information pattern after, obtain the ambient image parameter in the touchpad operation zone, and to described ambient image parameter transform in real time, processing such as denoising, rectification, binaryzation; Carry out following several processing procedure then:

When operating personnel knock twice touch pads 1 continuously in 0.5s after, the sound transducer of touch pad 1 gets access to corresponding touch pad sensed parameter, described touch pad sensed parameter and the input information of presetting are finished identification parameter to be compared, if conform to, then withdraw from the keyboard input information pattern of obtaining.

As seen, the realization of the embodiment of the invention combines the function of keyboard and the function of touch pad together, connects thereby simplify peripheral hardware; And can also make the interpretation staff when explaining, easily realize instructional functions such as traditional writing on the blackboard, drawing with this touch pad, reach and improve interactive purpose.

Embodiment nine

Suppose that this touch pad 1 preset following information:

When object touched touch pad 1 surface, the touch pad sensed parameter of being obtained was a high level, and when object did not contact touch pad 2 surfaces, the touch pad sensed parameter of being obtained was a low level; When the electric capacity of the electric capacity perception film on touch pad 1 surface changes, obtain the pulse signal of touch pad sensed parameter, and hold time with a high level and (to reach a certain preset value enough for a short time, but do not have) pulse signal be the center, intercept (for example, can be 1s or 2s) above-mentioned finger motion locus in the time cycle; The position that is placed on the touch pad with finger is the reference key position of QWERTY keyboard then, and estimates the position of other buttons according to the key arrangement of QWERTY keyboard; By the finger motion locus that is intercepted is analyzed, determine high level in conjunction with the position of each button again the button that is triggered takes place to point constantly, reach the purpose of obtaining keyboard input information.

Embodiment ten

Suppose that this touch pad 1 preset following information:

Input information type discrimination parameter comprises: both hands stretch represents that promptly touch pad 1 enters the cursor mobile message pattern of obtaining;

Input information finishes identification parameter and comprises: both hands are clenched fist and are represented that promptly touch pad 1 withdraws from the cursor mobile message pattern of obtaining;

Particularly, to the ambient image parameter of being obtained transform, processing such as denoising, rectification, binaryzation, if the ambient image parameter after handling comprises the images of gestures that both hands stretch, promptly conform to the input information type discrimination parameter of presetting, then enter the keyboard input information pattern of obtaining;

Enter obtain the keyboard input information pattern after, demonstrate a keyboard pattern on the display device, obtain the ambient image parameter in the touchpad operation zone, and to described ambient image parameter transform in real time, processing such as denoising, rectification, binaryzation, determine the corresponding relation of finger position and keyboard according to the object of which movement image parameter in the ambient image parameter after handling (actual object is finger) then, and on display device, demonstrate keyboard pattern and finger position pattern simultaneously; Operating personnel determine the correspondence position of target button on touch pad according to the present finger present position that shows on the display device, click the relevant position then; Real-time follow-up obtains the object of which movement image parameter, and then obtain finger motion locus, carry out following processing procedure simultaneously: when object touches touchpad surface, the touch pad sensed parameter of being obtained is a high level, when object did not contact touchpad surface, the touch pad sensed parameter of being obtained was a low level; Obtain the pulse signal of touch pad sensed parameter, and be the center, intercept above-mentioned finger motion locus in the time cycle with the hold time pulse signal of enough little (reach a certain preset value, but do not have) of a high level; By the finger motion locus that is intercepted is analyzed, determine high level in conjunction with the position of each button on the display device again the button that is triggered takes place to point constantly, reach the purpose of obtaining keyboard input information.

To the ambient image parameter of being obtained transform, processing such as denoising, rectification, binaryzation, if the ambient image parameter after handling comprises the images of gestures that both hands are clenched fist, promptly finish identification parameter and conform to, then withdraw from the keyboard input information pattern of obtaining with the input information of presetting.

Need to prove that the touchpad to acquire input information method that the invention described above embodiment provides also comprises following technical scheme in specific implementation process:

(1) described in the such scheme " at least one according in described touch pad sensed parameter and the described ambient image parameter; and default input information discrimination parameter is determined the input information of touch pad " can finish by one or more processing units, and described processing unit can all or part ofly be arranged on the touch pad, also can all or part ofly be arranged at smart machine that this touch pad links to each other on;

If described processing unit is arranged on the touch pad, then touch pad only needs the input information after handling is passed to the smart machine that is attached thereto by wired or wireless mode, and smart machine only needs to carry out corresponding logical process or interface display gets final product according to received touch pad input information;

If described processing unit is arranged on the smart machine, then touch pad passes to the smart machine that is attached thereto with touch pad sensed parameter and the ambient image parameter of being obtained by wired or wireless mode, carry out the input information that Treatment Analysis is determined touch pad by smart machine again, and carry out corresponding logical process or interface display according to this information.

(2) the ambient image parameter in the touchpad operation zone described in the such scheme is obtained by camera; The number of described camera can be one or more, but is preferably a plurality of and is arranged at the diverse location of touch pad respectively, and the various unfavorable factors that influence such as object blocks to avoid, geometric distortion, reflected light stack are to obtaining the influence of ambient image parameter; When using two or more camera, can adopt stereovision technique to calculate the locus of object with respect to touchpad surface.

(3) (for example can be provided with on the touch pad described in the such scheme in order to the sound transducer of the sound wave running parameter of obtaining touch pad, can be microphone) and/or, touch or knock touch pad thereby more accurately judge object in order to the vibration transducer of the vibration parameters that obtains touch pad.

(4) slightly touch touch pad and knock touch pad for accurate differentiation, can adopt following mode:

＜1〉on touch pad, adopts multiple cognition technology simultaneously, electric capacity perception film and resistance perception film for example are installed simultaneously, electric capacity perception film and vibration transducer or the like are installed simultaneously;

＜2〉use can the multistage oscillation intensity of perception vibration transducer, perhaps use the sound transducer of perception multistage acoustic intensity.

The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.

Claims

1. the method for a touchpad to acquire input information is characterized in that, comprising:

2. the method for touchpad to acquire input information according to claim 1 is characterized in that, the type of the input information of described touch pad comprises cursor mobile message, mouse right and left key operation information, handwritten input information and keyboard input information;

3. the method for touchpad to acquire input information according to claim 2 is characterized in that,

According at least one in described touch pad sensed parameter and the described ambient image parameter, and default input information discrimination parameter determines that the input information of touch pad comprises following at least one:

4. according to the method for claim 1,2 or 3 described touchpad to acquire input information, it is characterized in that described touch pad sensed parameter comprises: the vibration parameters of touch pad, sound wave running parameter, capacitance variations parameter, resistance variations parameter or infrared ray running parameter.

5. the method for touchpad to acquire input information according to claim 4 is characterized in that, described touch pad is provided with sound transducer, in order to obtain the sound wave running parameter of touch pad.

6. the method for touchpad to acquire input information according to claim 4 is characterized in that, described touch pad is provided with vibration transducer, in order to obtain the vibration parameters of touch pad.

7. according to the method for claim 1,2 or 3 described touchpad to acquire input information, it is characterized in that the ambient image parameter in the described touchpad operation zone comprises touch pad image parameter, images of gestures parameter, objective direction image parameter or object of which movement image parameter.

8. the method for touchpad to acquire input information according to claim 7 is characterized in that, described object of which movement image parameter comprises the movement locus of object image parameter; Determine handwritten input information according to the movement locus of object image parameter.

9. the method for touchpad to acquire input information according to claim 7, it is characterized in that, adopt stereovision technique that objective direction image parameter in the ambient image parameter or object of which movement image parameter are calculated, thereby determine the input information of touch pad.

10. according to the method for claim 1,2 or 3 described touchpad to acquire input information, it is characterized in that the ambient image parameter in the described touchpad operation zone is obtained by camera; The number of described camera is at least one.