CN105162986A - Method and system for turning on/off screen through front-facing camera for mobile terminal - Google Patents
Method and system for turning on/off screen through front-facing camera for mobile terminal Download PDFInfo
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- CN105162986A CN105162986A CN201510625429.4A CN201510625429A CN105162986A CN 105162986 A CN105162986 A CN 105162986A CN 201510625429 A CN201510625429 A CN 201510625429A CN 105162986 A CN105162986 A CN 105162986A
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Abstract
The invention discloses a method and system for turning on/off a screen through a front-facing camera for a mobile terminal. The method comprises the following steps: detecting whether the mobile terminal is in a call state or not; when a detection result indicates that the mobile terminal is in the call state, acquiring one frame of image data at first preset time intervals through the front-facing camera; and calculating the percentage of a black pixel number in the acquired image data in a total pixel number of the acquired image data, judging whether the percentage is greater than or equal to a first preset value or not, if so, controlling to turn off the screen, and otherwise, controlling to turn on the screen. Through adoption of the method and system, a function of turning off the screen can be realized when the mobile terminal is put close to a human face without installation of a proximity sensor. Compared with the prior art, the method and system have the advantages that the hardware space is saved, and the cost can be lowered.
Description
Technical field
The present invention relates to technical field of mobile terminals, particularly relate to the method and system of a kind of mobile terminal by front-facing camera switch screen.
Background technology
Along with the development of mobile communication and improving constantly of people's living standard, the use of various mobile terminals as mobile phone is more and more universal, and mobile phone has become indispensable means of communication in people's life.
In prior art, the function of mobile phone gets more and more, and call function is one of function of often using of mobile terminal.
In communication process, if mobile terminal is pressed close to face by user, now because user cannot see screen display, screen can be closed to save electricity, also can prevent the face of screen overheated scald user simultaneously.In the prior art, above-mentioned functions is by installing proximity transducer additional in face, mobile terminal screen place, by proximity transducer detecting distance, selects to open or close screen according to distance; In this technical scheme, proximity transducer must be installed additional in mobile terminal, not only take the hardware space of mobile terminal, but also add cost.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
The technical problem to be solved in the present invention is, for the above-mentioned defect of prior art, provides a kind of mobile terminal by the system of front-facing camera switch screen.The invention provides the method and system of a kind of mobile terminal by front-facing camera switch screen, technical scheme provided by the present invention need not install proximity transducer additional in the terminal, can save hardware space, can reduce cost again, provide users with the convenient.
The technical scheme that technical solution problem of the present invention adopts is as follows:
Mobile terminal, by a method for front-facing camera switch screen, wherein, comprising:
Whether S, detection mobile terminal are in talking state;
A., when detecting that mobile terminal is in talking state, a frame image data is obtained by front-facing camera every first scheduled time;
B. calculate black picture element number in the view data obtained and account for the percentage of the total number of pixels of view data of described acquisition, judge whether described percentage is more than or equal to the first preset value, if then control to close screen, otherwise control point bright screen curtain.
Described mobile terminal, by the method for front-facing camera switch screen, wherein, comprises between described steps A and B:
F1., first counter and the second counter are set, and described first counter and the second counter are all reset;
F2. successively each pixel of obtained view data is judged, often judge that described second counter is then added 1 by a pixel, if being judged pixel is black, described first counter is added 1;
F3., at the end of judging all pixels of obtained view data, the number that the value of described first counter is black picture element in obtained view data, the value of described second counter is the total number of pixels of obtained view data.
Described mobile terminal is by the method for front-facing camera switch screen, and wherein, described step F 2 judges whether a pixel is that black specifically comprises:
G1, when the form of obtained view data is yuv format, then judge whether pixel meets Y=0, U=128, V=128; If meet, judge that described pixel is black;
G2, when the form of obtained view data is RGB, then judge whether pixel meets R=0, G=0, B=0, if meet, judge that described pixel is black.
Described mobile terminal is by the method for front-facing camera switch screen, and wherein, described step B specifically comprises:
B1. in obtained view data, the number of black picture element is divided by the total number of pixels of obtained view data, obtains black picture element number in obtained view data and accounts for the percentage of the total number of pixels of obtained view data;
B2. judge whether described percentage is more than or equal to the first preset value, if then enter B3, otherwise enter B4;
If B3. current screen is open mode, then control to close screen;
If B4. current screen is closed condition, then control to open screen.
Described mobile terminal, by the method for front-facing camera switch screen, wherein, also comprises after described step B:
C, when detecting that mobile terminal closes call, stop screen camera on the whole obtain a frame image data every first scheduled time, and open screen.
Mobile terminal, by a system for front-facing camera switch screen, wherein, comprising:
Whether call detection module, be in talking state for detecting mobile terminal;
Image collection module, when detecting that mobile terminal is in talking state, obtains a frame image data by front-facing camera every first scheduled time;
Calculate and judge module, calculate black picture element number in the view data obtained and account for the percentage of the total number of pixels of view data of described acquisition, judge whether described percentage is more than or equal to the first preset value;
Screen on-off module, when described percentage is more than or equal to the first preset value, then controls to close screen, otherwise control point bright screen curtain.
Described mobile terminal, by the system of front-facing camera switch screen, wherein, also comprises:
Detection module is closed in call, for when detecting that mobile terminal closes call, stop screen camera on the whole obtain a frame image data every first scheduled time, and open screen
.
Described mobile terminal is by the system of front-facing camera switch screen, and wherein, described calculating and judge module comprise:
Setting unit, for. the first counter and the second counter are set, and described first counter and the second counter are all reset;
Counting unit, for judging each pixel of obtained view data successively, often judging that described second counter is then added 1 by a pixel, if being judged pixel is black, described first counter being added 1;
Pixel confirmation unit, for. at the end of judging all pixels of obtained view data, the number that the value of described first counter is black picture element in obtained view data, the value of described second counter is the total number of pixels of obtained view data
.
Described mobile terminal is by the system of front-facing camera switch screen, and wherein, described calculating and judge module also comprise:
First pixel judging unit, when being yuv format for working as the form of obtained view data, then judges whether pixel meets Y=0, U=128, V=128; If meet, judge that described pixel is black;
Second pixel judging unit, when being RGB for working as the form of obtained view data, then judges whether pixel meets R=0, G=0, B=0, if meet, judges that described pixel is black;
Percentage calculation unit, for the number of black picture element in obtained view data divided by the total number of pixels of obtained view data, obtain black picture element number in obtained view data and account for the percentage of the total number of pixels of obtained view data;
Percentage judging unit, for judging whether described percentage is more than or equal to the first preset value.
Described mobile terminal is by the system of front-facing camera switch screen, and wherein, described screen on-off module comprises:
Screen state judging unit, for judging that current screen is open mode or closed condition;
Control unit opened by screen, opens screen for controlling;
Screen closing control unit, closes screen for controlling.
Mobile terminal provided by the present invention is by the system of front-facing camera switch screen, a kind of method by Front camera switch screen of the present invention and device, by when detecting that mobile terminal is in talking state, by screen camera on the whole obtain a frame image data every first scheduled time; Calculate black picture element number in a described frame image data and account for the percentage of the total number of pixels of a described frame image data, judge whether described percentage is more than or equal to the first preset value, then closes screen if yes, otherwise open screen.Need not proximity transducer be installed additional, also can realize mobile terminal when pressing close to face, close the function of screen, compared with prior art can save hardware space, can cost be reduced again.
Accompanying drawing explanation
Fig. 1 is the flow chart of mobile terminal of the present invention by the preferred embodiment of the method for front-facing camera switch screen.
Fig. 2 is the flow chart of mobile terminal of the present invention by the embody rule embodiment of the method for front-facing camera switch screen.
Fig. 3 is the functional schematic block diagram of mobile terminal of the present invention by the preferred embodiment of the system of front-facing camera switch screen.
Embodiment
For making object of the present invention, technical scheme and advantage clearly, clearly, developing simultaneously referring to accompanying drawing, 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, be not intended to limit the present invention.
Refer to Fig. 1, Fig. 1 is the flow chart of mobile terminal of the present invention by the preferred embodiment of the method for front-facing camera switch screen.Mobile terminal shown in Fig. 1, by the method for front-facing camera switch screen, comprising:
Whether step S100, detection mobile terminal are in talking state.
In the embodiment of the present invention, described mobile terminal is preferably mobile phone, and when implementing, whether first detection of handset processes talking state.
Step S200, when detecting that mobile terminal is in talking state, obtain a frame image data by front-facing camera every first scheduled time.
When mobile terminal handset processes talking state being detected, automatically controlling to open front-facing camera every such as 1 second first scheduled time, obtaining a frame image data.
In the view data that step S300, calculating obtain, black picture element number accounts for the percentage of the total number of pixels of view data of described acquisition, judges whether described percentage is more than or equal to the first preset value, if then control to close screen, otherwise control point bright screen curtain.
In the embodiment of the present invention, the first counter for calculating black picture element number and the second counter for calculating total number of pixels can be set in concrete enforcement, and described first counter and the second counter are all reset; Successively each pixel of obtained view data is judged, often judge that described second counter is then added 1 by a pixel, if being judged pixel is black, described first counter is added 1.
At the end of judging all pixels of obtained view data, the number that the value of described first counter is black picture element in obtained view data, the value of described second counter is the total number of pixels of obtained view data.
Wherein, describedly judge whether a pixel is that black specifically comprises:
When the form of obtained view data is yuv format, then judge whether pixel meets Y=0, U=128, V=128; If meet, judge that described pixel is black.(YUV a kind of colour coding method (belonging to PAL) of adopting by eurovision system, be the color space that PAL and SECAM simulation color television system adopts.In modern color television system, usual employing three pipe colour camera or colored CCD video camera carry out capture, then the color picture signal obtained is obtained RGB after color separation, respectively amplification correction, obtain brightness signal Y and two color difference signal B-Y(and U through matrixer again), R-Y(and V), brightness and aberration three signals are encoded by last transmitting terminal respectively, send with same channel.The method for expressing of this color is exactly that so-called YUV color space represents).
And the form of working as obtained view data is when being RGB, then judge whether pixel meets R=0, G=0, B=0, if meet, judge that described pixel is black.(rgb color pattern is a kind of color standard of industrial quarters, that namely RGB is the color representing red, green, blue three passages by obtaining color miscellaneous to the change of red (R), green (G), blue (B) three Color Channels and their superpositions each other).
Then: by the number of black picture element in obtained view data divided by the total number of pixels of obtained view data, obtain black picture element number in obtained view data and account for the percentage of the total number of pixels of obtained view data; Judge whether described percentage is more than or equal to the first preset value (such as 80%), if control to close screen (if namely current screen is open mode, then controlling to close screen); When otherwise control to open screen (even current screen is closed condition, then control open screen).
Further, described mobile terminal, by the method for front-facing camera switch screen, also comprises:
When detecting that mobile terminal closes call, stop screen camera on the whole obtain a frame image data every first scheduled time, and open screen.
Be described in further detail below by way of an embody rule embodiment the present invention:
Refer to Fig. 2, Figure 2 shows that the flow chart of mobile terminal of the present invention by the embody rule preferred embodiment of the method for Front camera switch screen, as shown in Figure 2, the method described in the present embodiment comprises the following steps:
S101. when detecting that mobile terminal is in talking state, by screen camera on the whole obtain a frame image data every first scheduled time (as 1 second).
After getting a frame image data, if each pixel of a frame image data is followed successively by: d [1], d [2] ..., d [N], wherein, N is natural number, is handled as follows it:
S1., first counter and the second counter are set, and described first counter and the second counter are all reset.
S2. successively to each pixel d [1] of a described two field picture, d [2] ..., d [N] judges, often judge that described second counter is then added 1 by a pixel, if being judged pixel is black, described first counter added 1.
Wherein, judge whether a pixel is that black comprises: when the form of a described frame image data is YUV, then judge whether pixel meets Y=0, U=128, V=128; If meet, judge that described pixel is black; When the form of a described frame image data is RGB, then judge whether pixel meets R=0, G=0, B=0, if meet, judge that described pixel is black.
S3., at the end of judging all pixels of a described two field picture, the value of described first counter is the number of black picture element in a described frame image data, and the value of described second counter is the total number of pixels of a described two field picture.
S102. calculate black picture element number in a described frame image data and account for the percentage of the total number of pixels of a described frame image data, judge whether described percentage is more than or equal to the first preset value, then closes screen if yes, otherwise open screen.
Further, step S102 comprises the following steps:
S1021. in a described frame image data, the number of black picture element, divided by the total number of pixels of a described two field picture, obtains black picture element number in a described frame image data and accounts for the percentage of the total number of pixels of a described frame image data.
S1022. judge whether described percentage is more than or equal to the first preset value (as 80%), then enters S1023 if yes, otherwise enters S1024.
If S1023. current screen is open mode, then close screen.
If S1024. current screen is closed condition, then open screen.
S103. when detecting that mobile terminal closes call, stop screen camera on the whole obtain a frame image data every first scheduled time, and open screen
.
Therefore, the invention provides the method and system of a kind of mobile terminal by front-facing camera switch screen, technical scheme provided by the present invention need not install proximity transducer additional in the terminal, can save hardware space, can cost be reduced again, provide users with the convenient.
Based on above-described embodiment, present invention also offers the system of a kind of mobile terminal by front-facing camera switch screen, as shown in Figure 3, described system comprises:
Whether call detection module 310, be in talking state for detecting mobile terminal; As detailed above.
Image collection module 320, when detecting that mobile terminal is in talking state, obtains a frame image data by front-facing camera every first scheduled time; As detailed above.
Calculate and judge module 330, calculate black picture element number in the view data obtained and account for the percentage of the total number of pixels of view data of described acquisition, judge whether described percentage is more than or equal to the first preset value; As detailed above.
Screen on-off module 340, when described percentage is more than or equal to the first preset value, then controls to close screen, otherwise control point bright screen curtain; As detailed above.
Further, described mobile terminal, by the system of front-facing camera switch screen, wherein, also comprises:
Detection module is closed in call, for when detecting that mobile terminal closes call, stop screen camera on the whole obtain a frame image data every first scheduled time, and open screen; As detailed above.
Further, described mobile terminal is by the system of front-facing camera switch screen, and wherein, described calculating and judge module comprise:
Setting unit, for. the first counter and the second counter are set, and described first counter and the second counter are all reset; As detailed above.
Counting unit, for judging each pixel of obtained view data successively, often judging that described second counter is then added 1 by a pixel, if being judged pixel is black, described first counter being added 1; As detailed above.
Pixel confirmation unit, for. at the end of all pixels of obtained view data are judged, the number that the value of described first counter is black picture element in obtained view data, the value of described second counter is the total number of pixels of obtained view data; As detailed above.
Further, described mobile terminal is by the system of front-facing camera switch screen, and wherein, described calculating and judge module also comprise:
First pixel judging unit, when being yuv format for working as the form of obtained view data, then judges whether pixel meets Y=0, U=128, V=128; If meet, judge that described pixel is black; As detailed above.
Second pixel judging unit, when being RGB for working as the form of obtained view data, then judges whether pixel meets R=0, G=0, B=0, if meet, judges that described pixel is black; As detailed above.
Percentage calculation unit, for the number of black picture element in obtained view data divided by the total number of pixels of obtained view data, obtain black picture element number in obtained view data and account for the percentage of the total number of pixels of obtained view data; As detailed above.
Percentage judging unit, for judging whether described percentage is more than or equal to the first preset value.
Further, described mobile terminal is by the system of front-facing camera switch screen, and wherein, described screen on-off module comprises:
Screen state judging unit, for judging that current screen is open mode or closed condition; As detailed above.
Control unit opened by screen, opens screen for controlling; As detailed above.
Screen closing control unit, closes screen for controlling.
In sum, mobile terminal provided by the present invention is by the system of front-facing camera switch screen, a kind of method by Front camera switch screen of the present invention and device, by when detecting that mobile terminal is in talking state, by screen camera on the whole obtain a frame image data every first scheduled time; Calculate black picture element number in a described frame image data and account for the percentage of the total number of pixels of a described frame image data, judge whether described percentage is more than or equal to the first preset value, then closes screen if yes, otherwise open screen.Need not proximity transducer be installed additional, also can realize mobile terminal when pressing close to face, close the function of screen, compared with prior art can save hardware space, can cost be reduced again.
Should be understood that, application of the present invention is not limited to above-mentioned citing, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection range that all should belong to claims of the present invention.
Claims (10)
1. mobile terminal is by a method for front-facing camera switch screen, it is characterized in that, comprising:
Whether S, detection mobile terminal are in talking state;
A., when detecting that mobile terminal is in talking state, a frame image data is obtained by front-facing camera every first scheduled time;
B. calculate black picture element number in the view data obtained and account for the percentage of the total number of pixels of view data of described acquisition, judge whether described percentage is more than or equal to the first preset value, if then control to close screen, otherwise control point bright screen curtain.
2. mobile terminal according to claim 1 is by the method for front-facing camera switch screen, it is characterized in that, comprises between described steps A and B:
F1., first counter and the second counter are set, and described first counter and the second counter are all reset;
F2. successively each pixel of obtained view data is judged, often judge that described second counter is then added 1 by a pixel, if being judged pixel is black, described first counter is added 1;
F3., at the end of judging all pixels of obtained view data, the number that the value of described first counter is black picture element in obtained view data, the value of described second counter is the total number of pixels of obtained view data.
3. mobile terminal according to claim 2 is by the method for front-facing camera switch screen, and it is characterized in that, described step F 2 judges whether a pixel is that black specifically comprises:
G1, when the form of obtained view data is yuv format, then judge whether pixel meets Y=0, U=128, V=128; If meet, judge that described pixel is black;
G2, when the form of obtained view data is RGB, then judge whether pixel meets R=0, G=0, B=0, if meet, judge that described pixel is black.
4. mobile terminal according to claim 1 is by the method for front-facing camera switch screen, and it is characterized in that, described step B specifically comprises:
B1. in obtained view data, the number of black picture element is divided by the total number of pixels of obtained view data, obtains black picture element number in obtained view data and accounts for the percentage of the total number of pixels of obtained view data;
B2. judge whether described percentage is more than or equal to the first preset value, if then enter B3, otherwise enter B4;
If B3. current screen is open mode, then control to close screen;
If B4. current screen is closed condition, then control to open screen.
5. mobile terminal according to claim 1 is by the method for front-facing camera switch screen, it is characterized in that, also comprises after described step B:
C, when detecting that mobile terminal closes call, stop screen camera on the whole obtain a frame image data every first scheduled time, and open screen.
6. mobile terminal is by a system for front-facing camera switch screen, it is characterized in that, comprising:
Whether call detection module, be in talking state for detecting mobile terminal;
Image collection module, when detecting that mobile terminal is in talking state, obtains a frame image data by front-facing camera every first scheduled time;
Calculate and judge module, calculate black picture element number in the view data obtained and account for the percentage of the total number of pixels of view data of described acquisition, judge whether described percentage is more than or equal to the first preset value;
Screen on-off module, when described percentage is more than or equal to the first preset value, then controls to close screen, otherwise control point bright screen curtain.
7. mobile terminal, by the system of front-facing camera switch screen, is characterized in that, also comprises according to claim 6:
Detection module is closed in call, for when detecting that mobile terminal closes call, stop screen camera on the whole obtain a frame image data every first scheduled time, and open screen
.
8. mobile terminal is by the system of front-facing camera switch screen according to claim 6, and it is characterized in that, described calculating and judge module comprise:
Setting unit, for. the first counter and the second counter are set, and described first counter and the second counter are all reset;
Counting unit, for judging each pixel of obtained view data successively, often judging that described second counter is then added 1 by a pixel, if being judged pixel is black, described first counter being added 1;
Pixel confirmation unit, for. at the end of judging all pixels of obtained view data, the number that the value of described first counter is black picture element in obtained view data, the value of described second counter is the total number of pixels of obtained view data
.
9. mobile terminal is by the system of front-facing camera switch screen according to claim 6, and it is characterized in that, described calculating and judge module also comprise:
First pixel judging unit, when being yuv format for working as the form of obtained view data, then judges whether pixel meets Y=0, U=128, V=128; If meet, judge that described pixel is black;
Second pixel judging unit, when being RGB for working as the form of obtained view data, then judges whether pixel meets R=0, G=0, B=0, if meet, judges that described pixel is black;
Percentage calculation unit, for the number of black picture element in obtained view data divided by the total number of pixels of obtained view data, obtain black picture element number in obtained view data and account for the percentage of the total number of pixels of obtained view data;
Percentage judging unit, for judging whether described percentage is more than or equal to the first preset value.
10. mobile terminal is by the system of front-facing camera switch screen according to claim 6, and it is characterized in that, described screen on-off module comprises:
Screen state judging unit, for judging that current screen is open mode or closed condition;
Control unit opened by screen, opens screen for controlling;
Screen closing control unit, closes screen for controlling.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510625429.4A CN105162986A (en) | 2015-09-28 | 2015-09-28 | Method and system for turning on/off screen through front-facing camera for mobile terminal |
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| CN201510625429.4A CN105162986A (en) | 2015-09-28 | 2015-09-28 | Method and system for turning on/off screen through front-facing camera for mobile terminal |
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| CN201510625429.4A Pending CN105162986A (en) | 2015-09-28 | 2015-09-28 | Method and system for turning on/off screen through front-facing camera for mobile terminal |
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Application publication date: 20151216 |