CN103616954A - Virtual keyboard system, implementation method and mobile terminal - Google Patents
Virtual keyboard system, implementation method and mobile terminal Download PDFInfo
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- CN103616954A CN103616954A CN201310649442.4A CN201310649442A CN103616954A CN 103616954 A CN103616954 A CN 103616954A CN 201310649442 A CN201310649442 A CN 201310649442A CN 103616954 A CN103616954 A CN 103616954A
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Abstract
The invention discloses a virtual keyboard system, an implementation method and a mobile terminal. Image data are obtained through a camera, an image frame is intercepted from the image data, the plane space area where the image frame is arranged is set to be the area where a virtual keyboard is arranged, a button area is set in the area of the virtual keyboard, and whether a virtual button is pressed down or released is set by detecting and judging whether pixels of the skin color of the human body in the button area are gradually increased or decreased. According to the virtual keyboard system and the implementation method of the virtual keyboard system, the problems that an input interface of an interface keyboard of an existing mobile terminal is small and inputting is inconvenient are solved, rapid inputting can be achieved in space outside the interface through button-pressing gestures, and the user experience is better.
Description
Technical field
The present invention relates to intelligent mobile terminal system, relate in particular to a kind of virtual keyboard system, implementation method and mobile terminal.
Background technology
At present, the keyboard on mobile terminal is realized and is mainly contained two kinds, and a kind of for to have independent key area, particularly mobile phone on interface, after reserving key area, it is too small that other viewing area will seem; It is another kind of that in order to superpose dummy keyboard on contents displayed on interface, dummy keyboard and contents displayed on interface there will be Overlapping display like this, although expanded key area, the Overlapping display influential effect bringing user's input experience.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
In view of above-mentioned the deficiencies in the prior art part, the present invention, for addressing the deficiencies of the prior art and deficiency, proposes a kind of virtual keyboard system, implementation method and mobile terminal.
The technical scheme that technical solution problem of the present invention adopts is as follows:
A virtual keyboard system, comprising: image acquisition unit, dummy keyboard setup unit and button Check processing unit, wherein:
Image acquisition unit: for obtaining view data from camera;
Dummy keyboard setup unit: intercept a two field picture for the view data in camera unit, this plane space region, two field picture place is set as to the region at dummy keyboard place, and set key area in described dummy keyboard region;
Button Check processing unit: whether be pressed or discharge for detection of each virtual key.
Further, described image acquisition unit also comprises: camera unit and graphics processing unit;
Described camera unit: for starting camera, obtain the view data that camera senses, and image data format is stored as to YCrCb;
Described graphics processing unit: for obtaining human body complexion pixel in aforementioned view data, the YCrCb value of pixel meets 133≤Cr≤173 and 77≤Cb≤127 are human body complexion pixel.
Further, described dummy keyboard setup unit also comprises: dummy keyboard position processing unit and virtual key regional processing unit;
Described dummy keyboard position processing unit: for the view data in camera unit, according to distance intercepting and a two field picture of default dummy keyboard position and camera, this plane space region, two field picture place is set as to the region at dummy keyboard place;
Described virtual key regional processing unit: for set some zonules as virtual key region in aforementioned dummy keyboard region.
Further, described button Check processing unit also comprises: button presses recognition unit and button discharges recognition unit;
Described button is pressed recognition unit: for each virtual key region is divided into some subregions, in virtual key region being detected, with human body complexion pixel subregion quantity, increase gradually, set virtual key and be pressed;
Described button discharges recognition unit: for each virtual key region is divided into some subregions, in virtual key region being detected, with human body complexion pixel subregion quantity, reduce gradually, set virtual key and be released.
The present invention also provides a kind of mobile terminal with virtual keyboard system, comprises camera and display screen, also comprises the virtual key system described in any one above.
Further, described camera is front-facing camera.
The present invention also provides a kind of implementation method of dummy keyboard, comprises the following steps:
A, from camera, obtain view data;
B, in aforementioned view data, intercept a two field picture, the region using this plane space region, two field picture place as dummy keyboard place, and set key area in described dummy keyboard region;
C, detect each virtual key and whether be pressed or discharge and carry out.
Further, described steps A is implemented as follows:
A101, startup camera, obtain the view data that camera senses, and image data format be stored as to YCrCb;
A102, in aforementioned view data, obtain human body complexion pixel, the YCrCb value of pixel meets 133≤Cr≤173 and 77≤Cb≤127 are human body complexion pixel.
Further, described step B is implemented as follows:
B101, in the view data of camera unit, according to the distance intercepting of default dummy keyboard position and camera and a two field picture, this plane space region, two field picture place is set as to the region at dummy keyboard place;
B102, in aforementioned dummy keyboard region, set some zonules as virtual key region.
Further, described step C is implemented as follows:
C101, each virtual key region is divided into some subregions, in virtual key region being detected, with human body complexion pixel subregion quantity, increases gradually, set virtual key and be pressed;
C102, each virtual key region is divided into some subregions, in virtual key region being detected, with human body complexion pixel subregion quantity, reduces gradually, set virtual key and be released.
Compared with prior art, a kind of virtual keyboard system provided by the invention, implementation method and mobile terminal, by camera, obtain view data, and in view data, intercept a two field picture, this plane space region, two field picture place is set as to the region at dummy keyboard place, and set key area in described dummy keyboard region, by detection, judge that key area human body complexion pixel is to increase gradually or reduce that to set virtual key be pressed or discharge, by dummy keyboard of the present invention and its implementation, can well avoid not problem easily of the less and input of existing interface of mobile terminal keyboard inputting interface, can in the external space of interface, by button gesture, realize quick input, user experiences better.
Accompanying drawing explanation
Fig. 1 is the structural principle schematic diagram of a kind of virtual keyboard system of the present invention.
Fig. 2 is the structural principle schematic diagram of a kind of mobile terminal with virtual keyboard system of the present invention.
Fig. 3 is the process flow diagram of the implementation method of a kind of dummy keyboard of the present invention.
Fig. 4 is the specific implementation process flow diagram of the implementation method step S1 of a kind of dummy keyboard of Fig. 3.
Fig. 5 is the specific implementation process flow diagram of the implementation method step S2 of a kind of dummy keyboard of Fig. 3.
Fig. 6 is the specific implementation process flow diagram of the implementation method step S3 of a kind of dummy keyboard of Fig. 3.
Fig. 7 is dummy keyboard region described in embodiment and key area schematic diagram.
Fig. 8 is that in Fig. 7, subregion schematic diagram is divided in key area.
Embodiment
For making object of the present invention, technical scheme and advantage clearer, clear and definite, referring to accompanying drawing, developing simultaneously, the present invention is described in more detail for embodiment.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
A kind of virtual keyboard system, implementation method and mobile terminal, by camera, obtain view data, and in view data, intercept a two field picture, this plane space region, two field picture place is set as to the region at dummy keyboard place, and set key area in described dummy keyboard region, by detection, judge that key area human body complexion pixel is to increase gradually or reduce that to set virtual key be pressed or discharge, by dummy keyboard of the present invention and its implementation, can well avoid not problem easily of the less and input of existing interface of mobile terminal keyboard inputting interface, can in the external space of interface, by button gesture, realize quick input, user experiences better.
As shown in Figure 1, a kind of virtual keyboard system provided by the invention, comprising: image acquisition unit 10, dummy keyboard setup unit 20 and button Check processing unit 30, wherein:
Image acquisition unit 10: for obtaining view data from camera;
Dummy keyboard setup unit 20: intercept a two field picture for the view data in camera unit, this plane space region, two field picture place is set as to the region at dummy keyboard place, and set key area in described dummy keyboard region;
Button Check processing unit 30: whether be pressed or discharge for detection of each virtual key.
Further, described image acquisition unit 10 also comprises: camera unit 101 and graphics processing unit 102;
Described camera unit 101: for starting camera, obtain the view data that camera senses, and image data format is stored as to YCrCb;
Described graphics processing unit 102: for obtaining human body complexion pixel in aforementioned view data, the YCrCb value of pixel meets 133≤Cr≤173 and 77≤Cb≤127 are human body complexion pixel.
Because general image is all based on rgb space, in rgb space, affected by brightness quite large for the colour of skin of people's face, so colour of skin point is difficult to separate from non-colour of skin point, that is to say in this space after treatment, colour of skin point is discrete point, centre is embedded with a lot of non-colours of skin, and this demarcates (demarcation of people's face, eyes etc.) for area of skin color and has brought a difficult problem.If RGB is transferred to YCrCb space, can ignore the impact of Y (brightness), very little because this space is affected by brightness, the colour of skin can produce well birdss of the same feather flock together.So just three-dimensional space will be two-dimentional CrCb, colour of skin point can form must shape, as: the words of people's face can be seen the region of people's face, the words of arm can be seen the form of an arm, very beneficial to tupe identification, rule of thumb the CrCb value of certain point meets: 133≤Cr≤173,77≤Cb≤127 so this point are considered to colour of skin point, other be just non-colour of skin point.
Further, described dummy keyboard setup unit 20 also comprises: dummy keyboard position processing unit 201 and virtual key regional processing unit 202;
Described dummy keyboard position processing unit 201: for the view data in camera unit, intercept a two field picture according to the distance of default dummy keyboard position and camera, this plane space region, two field picture place is set as to the region at dummy keyboard place;
Described virtual key regional processing unit 202: for set some zonules as virtual key region in aforementioned dummy keyboard region.
Because the image space of camera picked-up is very large, we only as required, such as apart from the far and near self-defined distance of camera, according to this apart from intercepting view data in a two field picture, this plane space region, two field picture place is set as to the region at dummy keyboard place, in aforementioned dummy keyboard region, set some zonules as virtual key region, take a virtual key region is example, as shown in Figure 7, frame is virtual key panel, and the trapezoid area that ABCD surrounds into is a virtual key region.
Further, described button Check processing unit 30 also comprises: button presses recognition unit 301 and button discharges recognition unit 302;
Described button is pressed recognition unit 301: for each virtual key region is divided into some subregions, in virtual key region being detected, with human body complexion pixel subregion quantity, increase gradually, set virtual key and be pressed;
Described button discharges recognition unit 302: for each virtual key region is divided into some subregions, in virtual key region being detected, with human body complexion pixel subregion quantity, reduce gradually, set virtual key and be released.
As shown in Figure 8, take a key area and be divided into three sub regions as example, a key area ABCD is divided into ABFE, EFHG and GHCD tri-sub regions.
When following process being detected, think that virtual key is pressed:
ABFE region exists human body complexion pixel and EFHG and GHCD region not to have human body complexion pixel;
ABFE region and EFHG region all exist human body complexion pixel and GHCD region not to have human body complexion pixel;
All there is human body complexion pixel in ABFE region, EFHG region and GHCD region;
When following process being detected, think that virtual key is released:
All there is human body complexion pixel in ABFE region, EFHG region and GHCD region;
ABFE region and EFHG region all exist human body complexion pixel and GHCD region not to have human body complexion pixel;
ABFE region exists human body complexion pixel and EFHG and GHCD region not to have human body complexion pixel;
By above-mentioned system, camera is stored as YCrCb form by the view data of obtaining, and in view data, intercept a two field picture, this plane space region, two field picture place is set as to the region at dummy keyboard place, and set key area in described dummy keyboard region, by detection, judge that key area human body complexion pixel is to increase gradually or reduce that to set virtual key be pressed or discharge, can in the external space of interface, by button gesture, realize quick input, user experiences better.
As shown in Figure 2, the present invention also provides a kind of mobile terminal with virtual keyboard system, comprises camera and display screen, also comprises the virtual key system described in aforementioned any one.
Further, described camera is front-facing camera.
Due to the mobile terminal with virtual keyboard system of the present invention, its virtual keyboard system is identical with the principle of work of above-mentioned virtual keyboard system, does not repeat herein.
As shown in Figure 3, the present invention also provides a kind of implementation method of dummy keyboard, comprises the following steps:
S1, from camera, obtain view data;
S2, in aforementioned view data, intercept a two field picture, the region using this plane space region, two field picture place as dummy keyboard place, and set key area in described dummy keyboard region;
S3, detect each virtual key and whether be pressed or discharge and carry out.
Particularly, as shown in Figure 4, step S1 is implemented as follows:
S101, startup camera, obtain the view data that camera senses, and image data format be stored as to YCrCb;
S102, in aforementioned view data, obtain human body complexion pixel, the YCrCb value of pixel meets 133≤Cr≤173 and 77≤Cb≤127 are human body complexion pixel.
Particularly, as shown in Figure 5, step S2 is implemented as follows:
S201, in the view data of camera unit, according to the distance intercepting of default dummy keyboard position and camera and a two field picture, this plane space region, two field picture place is set as to the region at dummy keyboard place;
S202, in aforementioned dummy keyboard region, set some zonules as virtual key region.
Particularly, as shown in Figure 6, step S3 is implemented as follows:
S301, each virtual key region is divided into some subregions, in virtual key region being detected, with human body complexion pixel subregion quantity, increases gradually, set virtual key and be pressed;
S302, each virtual key region is divided into some subregions, in virtual key region being detected, with human body complexion pixel subregion quantity, reduces gradually, set virtual key and be released.
As shown in Figure 8, take equally a key area is divided into three sub regions as example:
Step S301 is implemented as follows:
When following process being detected, think that virtual key is pressed:
S3011, ABFE region exist human body complexion pixel and EFHG and GHCD region not to have human body complexion pixel;
S3012, ABFE region and EFHG region all exist human body complexion pixel and GHCD region not to have human body complexion pixel;
All there is human body complexion pixel in S3013, ABFE region, EFHG region and GHCD region;
Step S302 is implemented as follows:
All there is human body complexion pixel in S3021, ABFE region, EFHG region and GHCD region;
S3022, ABFE region and EFHG region all exist human body complexion pixel and GHCD region not to have human body complexion pixel;
S3023, ABFE region exist human body complexion pixel and EFHG and GHCD region not to have human body complexion pixel;
Because dummy keyboard implementation method of the present invention is identical with the principle of work of above-mentioned virtual keyboard system embodiment, do not repeat herein.
By virtual keyboard system and its implementation of above-mentioned mobile terminal, camera is stored as YCrCb form by the view data of obtaining, and in view data, intercept a two field picture, this plane space region, two field picture place is set as to the region at dummy keyboard place, and set key area in described dummy keyboard region, by detection, judge that key area human body complexion pixel is to increase gradually or reduce that to set virtual key be pressed or discharge, can in the external space of interface, by button gesture, realize quick input, user experiences better.
Should be understood that; the foregoing is only preferred embodiment of the present invention; be not sufficient to limit technical scheme of the present invention; for those of ordinary skills; within the spirit and principles in the present invention; can be increased and decreased according to the above description, replaced, converted or be improved, and all these increases and decreases, replace, conversion or improve after technical scheme, all should belong to the protection domain of claims of the present invention.
Claims (10)
1. a virtual keyboard system, is characterized in that, comprising: image acquisition unit, dummy keyboard setup unit and button Check processing unit, wherein:
Image acquisition unit: for obtaining view data from camera;
Dummy keyboard setup unit: intercept a two field picture for the view data in camera unit, this plane space region, two field picture place is set as to the region at dummy keyboard place, and set key area in described dummy keyboard region;
Button Check processing unit: whether be pressed or discharge for detection of each virtual key.
2. virtual keyboard system according to claim 1, is characterized in that, described image acquisition unit also comprises: camera unit and graphics processing unit;
Described camera unit: for starting camera, obtain the view data that camera senses, and image data format is stored as to YCrCb;
Described graphics processing unit: for obtaining human body complexion pixel in aforementioned view data, the YCrCb value of pixel meets 133≤Cr≤173 and 77≤Cb≤127 are human body complexion pixel.
3. virtual keyboard system according to claim 1, is characterized in that, described dummy keyboard setup unit also comprises: dummy keyboard position processing unit and virtual key regional processing unit;
Described dummy keyboard position processing unit: for the view data in camera unit, according to distance intercepting and a two field picture of default dummy keyboard position and camera, this plane space region, two field picture place is set as to the region at dummy keyboard place;
Described virtual key regional processing unit: for set some zonules as virtual key region in aforementioned dummy keyboard region.
4. virtual keyboard system according to claim 1, is characterized in that, described button Check processing unit also comprises: button presses recognition unit and button discharges recognition unit;
Described button is pressed recognition unit: for each virtual key region is divided into some subregions, in virtual key region being detected, with human body complexion pixel subregion quantity, increase gradually, set virtual key and be pressed;
Described button discharges recognition unit: for each virtual key region is divided into some subregions, in virtual key region being detected, with human body complexion pixel subregion quantity, reduce gradually, set virtual key and be released.
5. with a mobile terminal for virtual keyboard system, comprise camera and display screen, it is characterized in that, also comprise the virtual key system described in claim 1-4 any one.
6. mobile terminal according to claim 5, is characterized in that, described camera is front-facing camera.
7. an implementation method for dummy keyboard, is characterized in that, comprises the following steps:
A, from camera, obtain view data;
B, in aforementioned view data, intercept a two field picture, the region using this plane space region, two field picture place as dummy keyboard place, and set key area in described dummy keyboard region;
C, detect each virtual key and whether be pressed or discharge and carry out.
8. the implementation method of dummy keyboard according to claim 7, is characterized in that, described steps A is implemented as follows:
A101, startup camera, obtain the view data that camera senses, and image data format be stored as to YCrCb;
A102, in aforementioned view data, obtain human body complexion pixel, the YCrCb value of pixel meets 133≤Cr≤173 and 77≤Cb≤127 are human body complexion pixel.
9. the implementation method of dummy keyboard according to claim 7, is characterized in that, described step B is implemented as follows:
B101, in the view data of camera unit, according to the distance intercepting of default dummy keyboard position and camera and a two field picture, this plane space region, two field picture place is set as to the region at dummy keyboard place;
B102, in aforementioned dummy keyboard region, set some zonules as virtual key region.
10. the implementation method of dummy keyboard according to claim 7, is characterized in that, described step C is implemented as follows:
C101, each virtual key region is divided into some subregions, in virtual key region being detected, with human body complexion pixel subregion quantity, increases gradually, set virtual key and be pressed;
C102, each virtual key region is divided into some subregions, in virtual key region being detected, with human body complexion pixel subregion quantity, reduces gradually, set virtual key and be released.
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Application publication date: 20140305 |