CN103475849B - Method photographic head shooting angle being adjusted when video calling and device - Google Patents

Method photographic head shooting angle being adjusted when video calling and device Download PDF

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Publication number
CN103475849B
CN103475849B CN201310432772.8A CN201310432772A CN103475849B CN 103475849 B CN103475849 B CN 103475849B CN 201310432772 A CN201310432772 A CN 201310432772A CN 103475849 B CN103475849 B CN 103475849B
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user images
setting regions
shooting angle
adjusted
video calling
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CN201310432772.8A
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Chinese (zh)
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CN103475849A (en
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曾元清
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广东欧珀移动通信有限公司
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Publication of CN103475849A publication Critical patent/CN103475849A/en
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Abstract

The invention discloses the method and device that photographic head shooting angle are adjusted when video calling, described method includes: when detecting that terminal is in video calling, obtains the user images of terminal camera Real-time Collection; User images is carried out Face datection, it is judged that whether the face in user images is positioned within the setting regions of user images; The face of user images when the face in user images is not located within the setting regions of user images, according to the position of face and described setting regions, the shooting angle of terminal camera is adjusted, so that can be positioned within described setting regions. The present invention enables to the face of user images and is always positioned within setting regions, it is not necessary to both call sides carries out artificial adjustment by voice call, saves network broadband resource, improves Consumer's Experience during video calling.

Description

Method photographic head shooting angle being adjusted when video calling and device

Technical field

The present invention relates to communication technical field, particularly relate to the method and device that photographic head shooting angle are adjusted when video calling.

Background technology

Along with the fast lifting of the network bandwidth and the development of hardware device and universal, video calling penetrates into gradually to every field such as the study of people, work and lives. Video calling, also known as visual telephone, referring to transmit in real time between the terminals the voice of people and a kind of instant communication mode of image based on the Internet (such as 3G) end, wherein terminal can be the electronic equipments such as smart mobile phone, notebook computer, panel computer, personal digital assistant.

The terminal possessing video call function generally includes voice call device, camera head, image-receptive display device. Wherein, the voice call device of terminal is for sending call local terminal or receiving the voice messaging of call opposite end, camera head is for obtaining the image of call local terminal and sending to opposite end of conversing, image-receptive display device for receive call opposite end image, and call local terminal screen video image display window show this image.

To in the research of prior art and practice process, inventor have found that prior art at least there is problems in that this end subscriber of call is when carrying out video calling with call peer user, owing to call peer user moves or the difference of opposite end putting position of conversing, the head portrait sometimes resulting in call peer user can not be shown in the fixed position (such as centre position) of video call display screen of call local terminal all the time, now need to be adjusted by voice call with peer user of conversing, and original call between user can be interrupted in the process adjusted, waste more network broadband resource, and Consumer's Experience is not good.

Summary of the invention

In view of this, the embodiment of the present invention provides the method and device that photographic head shooting angle are adjusted when video calling, solves the technical problem that background section above is mentioned.

On the one hand, the embodiment of the present invention provides a kind of method photographic head shooting angle being adjusted when video calling, and described method includes:

When detecting that terminal is in video calling, obtain the user images of terminal camera Real-time Collection;

Described user images is carried out Face datection, it is judged that whether the face in described user images is positioned within the setting regions of described user images;

When the face in described user images is not located within the setting regions of described user images, position according to described face and described setting regions, the face of described user images the shooting angle of described terminal camera is adjusted, so that can be positioned within described setting regions.

On the one hand, the embodiment of the present invention also proposed a kind of device photographic head shooting angle being adjusted when video calling, and described device includes:

User images acquiring unit, for when detecting that terminal is in video calling, obtaining the user images of terminal camera Real-time Collection;

Face datection unit, for carrying out Face datection to described user images, it is judged that whether the face in described user images is positioned within the setting regions of described user images;

Shooting angle adjustment unit, during for being not located at when the face in described user images within the setting regions of described user images, position according to described face and described setting regions, the face of described user images the shooting angle of described terminal camera is adjusted, so that can be positioned within described setting regions.

Method photographic head shooting angle being adjusted when video calling and device that the embodiment of the present invention proposes have a characteristic that by the user images of terminal camera Real-time Collection is carried out Face datection, when the face judging user images is not located within the setting regions of this user images, the shooting angle of terminal camera is adjusted, so that the face of user images can be positioned within setting regions, artificial adjustment is carried out by voice call without both call sides, save network broadband resource, improve Consumer's Experience during video calling.

Accompanying drawing explanation

Fig. 1 is a kind of schematic flow sheet when video calling to the method that photographic head shooting angle is adjusted that first embodiment of the invention provides;

Fig. 2 (a) is that the shooting angle of local terminal photographic head is not adjusted the front local terminal user images display figure at opposite end display screen by a kind of of first embodiment of the invention offer;

Fig. 2 (b) is that a kind of shooting angle to terminal camera that first embodiment of the invention provides is adjusted the rear local terminal user images display figure at opposite end display screen;

Fig. 3 is a kind of structural representation when video calling to the device that photographic head shooting angle is adjusted that second embodiment of the invention provides;

Fig. 4 is the structural representation of the terminal that can be used for implementing the present invention program.

Detailed description of the invention

Below in conjunction with drawings and Examples, the present invention is described in further detail. It is understood that specific embodiment described herein is used only for explaining the present invention, but not limitation of the invention. It also should be noted that, for the ease of describing, accompanying drawing illustrate only part related to the present invention but not full content.

Fig. 1 illustrates the first embodiment of the present invention.

Fig. 1 is a kind of schematic flow sheet when video calling to the method that photographic head shooting angle is adjusted that first embodiment of the invention provides. The present embodiment mainly terminal to have video call function illustrates, this terminal can include but not limited to smart mobile phone, notebook computer, panel computer, personal digital assistant and pocket computer on knee etc. Referring to Fig. 1, described method includes:

Step S101, when detecting that terminal is in video calling, obtain terminal camera Real-time Collection user images.

In the present embodiment, terminal detects the triggering event to video calling in real time, if it is determined that when receiving video calling triggering signal, then send control signal to terminal camera, notice terminal camera Real-time Collection user images, then obtains the user images that terminal camera collects. Wherein, terminal camera has the adjustment function of horizontal vertical direction.

In a preferred implementation of the present embodiment, when terminal is the electronic equipment with touch screen and video call function, the triggering event of video calling is included but not limited to: user is directly with hands or the triggering that the video calling icon presented on terminal screen carried out by pointer. When the display screen that terminal adopts is resistive touch screen, it is generally the triggering adopting pointer to carry out; When the display screen that terminal adopts is capacitive touch screen, it is generally the triggering directly touched and carry out by user.

Step S102, user images is carried out Face datection, it is judged that whether the face in user images is positioned within the setting regions of user images.

After getting user images, first this image is carried out Face datection by terminal, extracts the human face region feature in this image. Described extraction process includes but not limited to: the user images got carries out the operations such as light compensation, area of skin color extraction, Morphological scale-space, and the face extracting user images treats favored area; The geometric properties of favored area or gray feature are verified further to utilize face template feature that face is treated, extract human face region, and then generate this human face region feature, and wherein said human face region feature includes the centre coordinate of human face region.

Then, terminal is according to the human face region feature generated, it is judged that whether the face in user images is positioned within the setting regions of user images. Concrete judge process includes: judge within the setting regions whether centre coordinate of human face region is positioned at user images, if, then judge, within the setting regions that the face in user images is positioned at user images, otherwise to judge within the setting regions that the face in user images is not located at user images. Wherein, the setting regions of user images can be in the Centromedian rectangular area of user images, and the center of its rectangular area is the center of user images, and length and width can be pre-set by terminal. Certainly, this setting regions can also is that the region of other form that terminal is preset, for instance the setting regions of user images is for being positioned at the Centromedian border circular areas of user images, and the center of its border circular areas is the center of user images, and radius can be pre-set by terminal.

It should be appreciated by those skilled in the art that, when the human face region feature generated includes the width of face, during other features such as length and angle, additive method also can be adopted so that whether the face judging in user images is positioned within the setting regions of user images, such as, according to the width of face in user images, length and centre coordinate these three human face region feature, judge that whether pixel number that the region that the setting regions of human face region and user images coincides comprises is be more than or equal to the threshold value set, if, then judge within the setting regions that the face in user images is positioned at user images, otherwise judge within the setting regions that the face in user images is not located at user images.

Step S103, when the face in user images is not located within the setting regions of user images, position according to described face and described setting regions, the face of user images the shooting angle of terminal camera is adjusted, so that can be positioned within described setting regions.

In the present embodiment, when the face in judging user images is not located within the setting regions of user images, the shooting angle of terminal camera, according to the position of face and described setting regions, is adjusted by terminal.

One of the present embodiment preferred embodiment in, concrete adjustment process is: calculate the centre coordinate of face in user images relative to the horizontal offset of the centre coordinate of user images setting regions and vertical offset; By the distance of the shooting angle of terminal camera mobile and horizontal side-play amount in the horizontal direction, in the vertical direction moves the distance of offset of vertical amount. Such as, terminal calculates the centre coordinate distance that side-play amount is 80 pixels of left shift in the horizontal direction relative to the setting regions of user images of the centre coordinate of face in user images, the side-play amount of in the vertical direction is the distance having offset downward 60 pixels, and then the shooting angle of terminal camera is moved to the left in the horizontal direction the distance of 80 pixels, in the vertical direction moves down the distance of 60 pixels.

Fig. 2 (a) be first embodiment of the invention provide a kind of the shooting angle of local terminal photographic head is not adjusted front local terminal user images the display figure, Fig. 2 (b) of opposite end display screen be first embodiment of the invention provide a kind of shooting angle to terminal camera be adjusted the rear local terminal user images display figure at opposite end display screen. Referring to Fig. 2 (a) and Fig. 2 (b), when local terminal user images is displayed in full screen at opposite end display screen, the setting regions 201 of user images is positioned at the centre position of opposite end display screen 20, the shooting angle of local terminal photographic head be not adjusted anteposition in the lower left corner of opposite end display screen 20 by the face 202 of user images, and can be positioned at the centre position of opposite end display screen 20 after the shooting angle of local terminal photographic head is adjusted.

For speed up processing, alleviate system burden, the present embodiment another preferred embodiment in, step S103 also can farther include following steps:

When the face in user images is not located within the setting regions of user images, whether the face determined whether before continuously in N framed user's image is all not located within the setting regions of user images;

If it is, calculate the user images of N frame and the mean place of face in this framed user image before continuously;

The face of user images according to described mean place and described setting regions, the shooting angle of terminal camera is adjusted, so that can be positioned within setting regions;

Wherein, N is the positive integer be more than or equal to 1, and the mean place of face includes the mean center point coordinates of face, mean breadth and average length etc.

One of the present embodiment preferred embodiment in, when the face in user images is positioned within the setting regions of user images, return step S101 and continue executing with when detecting that terminal is in video calling, obtain the user images of terminal camera Real-time Collection.

The present embodiment is by carrying out Face datection to the user images of terminal camera Real-time Collection, when the face judging user images is not located within the setting regions of this user images, the shooting angle of terminal camera is adjusted, so that the face of user images can be positioned within setting regions, artificial adjustment is carried out by voice call without both call sides, save network broadband resource, improve Consumer's Experience during video calling.

Fig. 3 illustrates the second embodiment of the present invention.

Fig. 3 is a kind of structural representation when video calling to the device that photographic head shooting angle is adjusted that second embodiment of the invention provides. Referring to Fig. 3, described device includes:

User images acquiring unit 301, for when detecting that terminal is in video calling, obtaining the user images of terminal camera Real-time Collection;

Face datection unit 302, for carrying out Face datection to user images, it is judged that whether the face in user images is positioned within the setting regions of user images;

Shooting angle adjustment unit 303, during for being not located at when the face in user images within the setting regions of user images, position according to face and described setting regions, be adjusted the shooting angle of terminal camera, so that the face of user images can be positioned within described setting regions.

In the present embodiment, user images acquiring unit 301 detects the triggering event to video calling in real time, if it is determined that when receiving video calling triggering signal, then send control signal to terminal camera, notice terminal camera Real-time Collection user images, then obtains the user images that terminal camera collects. Wherein, terminal camera has the adjustment function of horizontal vertical direction.

In a preferred implementation of the present embodiment, when terminal is the electronic equipment with touch screen and video call function, the triggering event of video calling is included but not limited to: user is directly with hands or the triggering that the video calling icon presented on terminal screen carried out by pointer. When the display screen that terminal adopts is resistive touch screen, it is generally the triggering adopting pointer to carry out; When the display screen that terminal adopts is capacitive touch screen, it is generally the triggering directly touched and carry out by user.

After user images acquiring unit 301 gets user images, the human face region in Face datection unit 302 extracts subelement 3021 and first this image is carried out Face datection, extracts the human face region feature in this image. Described extraction process includes but not limited to: the user images got carries out the operations such as light compensation, area of skin color extraction, Morphological scale-space, and the face extracting user images treats favored area; The geometric properties of favored area or gray feature are verified further to utilize face template feature that face is treated, extract human face region, and then generate this human face region feature, and wherein said human face region feature includes the centre coordinate of human face region.

Then, the face location judgment sub-unit 303 in Face datection unit 302 is according to the human face region feature generated, it is judged that whether the face in user images is positioned within the setting regions of user images. Concrete judge process includes: judge within the setting regions whether centre coordinate of human face region is positioned at user images, if, then judge, within the setting regions that the face in user images is positioned at user images, otherwise to judge within the setting regions that the face in user images is not located at user images. Wherein, the setting regions of user images can be in the Centromedian rectangular area of user images, and the center of its rectangular area is the center of user images, and length and width can be pre-set by terminal. Certainly, this setting regions can also is that the region of other form that terminal is preset, for instance the setting regions of user images is for being positioned at the Centromedian border circular areas of user images, and the center of its border circular areas is the center of user images, and radius can be pre-set by terminal.

It should be appreciated by those skilled in the art that, when the human face region feature generated includes the width of face, during other features such as length and angle, face location judgment sub-unit 303 also can adopt additive method so that whether the face judging in user images is positioned within the setting regions of user images, such as, according to the width of face in user images, length and centre coordinate these three human face region feature, judge that whether pixel number that the region that the setting regions of human face region and user images coincides comprises is be more than or equal to the threshold value set, if, then judge within the setting regions that the face in user images is positioned at user images, otherwise judge within the setting regions that the face in user images is not located at user images.

In the present embodiment, when the face that Face datection unit 302 judges in user images is not located within the setting regions of user images, the shooting angle of terminal camera, according to the position of face and described setting regions, is adjusted by shooting angle adjustment unit 303.

One of the present embodiment preferred embodiment in, shooting angle adjustment unit 303 includes: side-play amount computation subunit, for calculating the centre coordinate of face in user images relative to the horizontal offset of the centre coordinate of user images setting regions and vertical offset; Shooting angle adjusts subelement, and for the distance by the shooting angle mobile and horizontal side-play amount in the horizontal direction of terminal camera, in the vertical direction moves the distance of offset of vertical amount. Such as, side-play amount computation subunit calculates the centre coordinate distance that side-play amount is 80 pixels of left shift in the horizontal direction relative to the setting regions of user images of the centre coordinate of face in user images, when the side-play amount of in the vertical direction is the distance having offset downward 60 pixels, shooting angle adjusts subelement can be moved to the left the distance of 80 pixels in the horizontal direction by the shooting angle of terminal camera, and in the vertical direction moves down the distance of 60 pixels.

For speed up processing, alleviate system burden, the present embodiment another preferred embodiment in, shooting angle adjustment unit 303 includes:

Successive frame judgment sub-unit, during for being not located at when the face that Face datection unit 302 judges in user images within the setting regions of user images, determine whether before continuously, whether the face of N framed user's image is all not located within the setting regions of user images, if sending control signal to face mean place computation subunit;

Face mean place computation subunit, is used for receiving described control signal, calculates the user images of N frame and the mean place of face in this framed user image before continuously;

Described shooting angle adjusts subelement, for according to described mean place and described setting regions, the shooting angle of terminal camera being adjusted, so that the face of user images can be positioned within described setting regions;

Wherein, N is the positive integer be more than or equal to 1, and the mean place of face includes the mean center point coordinates of face, mean breadth and average length etc.

One of the present embodiment preferred embodiment in, when the face that Face datection unit 302 judges in user images is positioned within the setting regions of user images, user images acquiring unit 301, when detecting that terminal is in video calling, continues to obtain the user images of terminal camera Real-time Collection.

The present embodiment is by carrying out Face datection to the user images of terminal camera Real-time Collection, when the face judging user images is not located within the setting regions of this user images, the shooting angle of terminal camera is adjusted, so that the face of user images can be positioned within setting regions, artificial adjustment is carried out by voice call without both call sides, save network broadband resource, improve Consumer's Experience during video calling.

Fig. 4 is the structural representation of the terminal that can be used for implementing the present invention program. Referring to Fig. 4, terminal 40 can include the parts such as image collecting device 401, memorizer 402, processor 403, input block 404, display unit 405, communicator 406.

Image collecting device 401 can be used for catching the head image information of current end user, it is preferred that can be photographic head.

Memorizer 402 can be used for storing realize that the embodiment of the present invention proposes when video calling to the software program of the method that photographic head shooting angle is adjusted and module, processor 403 is by running the software program being stored in memorizer 402 and obtaining the data of image collecting device 401 and input block 404, thus performing the application of various function and data process.

Input block 404 can be used for receiving numeral or the note information of input, and produce the Trackpad relevant with user setup or function control, keyboard, mouse, action bars signal input.

Display unit 405 can be used for the information inputted by user of video-stream processor 403 offer or is supplied to the information of user and the various graphical user interface of terminal 40, these graphical user interface can be made up of figure, text, icon, video and its combination in any, in a preferred embodiment, display unit 405 is touch-screen display.

Communicator 406 can be used for being sent by Wireless/wired communication technology and receiving data, preferably, communicator 406 is radio communication device, this device can based on CDMA(CodeDivisionMultipleAccess, CDMA), WCDMA(WidebandCodeDivisionMultipleAccess, WCDMA), GPRS(GeneralPacketRadioService, general packet radio service) etc. existing wireless communication technology carry out transmission and the reception of data.

It will be understood by those skilled in the art that the terminal structure shown in Fig. 4 is not intended that the restriction to terminal, it is possible to include ratio and illustrate more or less of parts, or combine some parts, or different parts are arranged.

One of ordinary skill in the art will appreciate that all or part of step realizing above-described embodiment can be completed by hardware, can also be completed by the hardware that program carrys out instruction relevant, this program can be stored in computer-readable recording medium, and storage medium can include memorizer, disk or CD etc.

Note, above are only presently preferred embodiments of the present invention and institute's application technology principle. It will be appreciated by those skilled in the art that and the invention is not restricted to specific embodiment described here, various obvious change can be carried out for a person skilled in the art, readjust and substitute without departing from protection scope of the present invention. Therefore, although the present invention being described in further detail by above example, but the present invention is not limited only to above example, when without departing from present inventive concept, other Equivalent embodiments more can also be included, and the scope of the present invention is determined by appended right.

Claims (12)

1. method photographic head shooting angle being adjusted when video calling, it is characterised in that described method includes step:
When detecting that terminal is in video calling, obtain the user images of terminal camera Real-time Collection;
Described user images is carried out Face datection, it is judged that whether the face in described user images is positioned within the setting regions of described user images;
When the face in described user images is not located within the setting regions of described user images, position according to described face and described setting regions, the face of described user images the shooting angle of described terminal camera is adjusted, so that can be positioned within described setting regions.
2. method photographic head shooting angle being adjusted when video calling according to claim 1, it is characterized in that, described described user images is carried out Face datection, it is judged that whether the face in described user images is positioned at the step within the setting regions of described user images, including:
Described user images being carried out Face datection, extracts the human face region feature of described user images, wherein said human face region feature includes the centre coordinate of human face region;
Judge whether described centre coordinate is positioned within described setting regions, if, then judge, within the setting regions that the face in described user images is positioned at described user images, otherwise to judge within the setting regions that the face in described user images is not located at described user images.
3. method photographic head shooting angle being adjusted when video calling according to claim 2, it is characterized in that, the described position according to described face and described setting regions, the shooting angle of described terminal camera is adjusted, so that the face of described user images can be positioned at the step within described setting regions, including:
Calculate described centre coordinate relative to the horizontal offset of the centre coordinate of described setting regions and offset of vertical amount;
The shooting angle of described terminal camera moves the distance of described horizontal offset in the horizontal direction, and in the vertical direction moves the distance of described offset of vertical amount.
4. method photographic head shooting angle being adjusted when video calling according to claim 1, it is characterized in that, it is described when the face in described user images is not located within the setting regions of described user images, position according to described face and described setting regions, the shooting angle of described terminal camera is adjusted, so that the face of described user images can be positioned at the step within described setting regions, including:
When the face in described user images is not located within the setting regions of described user images, determine whether before continuously, whether the face of N framed user's image is all not located within the setting regions of described user images;
If it is, calculate user images and the mean place of face in this framed user image of described front N frame continuously;
The face of described user images according to described mean place and described setting regions, the shooting angle of described terminal camera is adjusted, so that can be positioned within described setting regions;
Wherein, N is the positive integer be more than or equal to 1.
5. method photographic head shooting angle being adjusted when video calling according to claim 1, it is characterised in that after the step whether described face judged in described user images is positioned within the setting regions of described user images, also include:
When the face in described user images is positioned within the setting regions of described user images, returns described in performing when detecting that terminal is in video calling, obtain the step of the user images of terminal camera Real-time Collection.
6. method photographic head shooting angle being adjusted when video calling according to claim 1, it is characterised in that the setting regions of described user images is for being positioned at the Centromedian rectangular area of described user images.
7. device photographic head shooting angle being adjusted when video calling, it is characterised in that described device includes:
User images acquiring unit, for when detecting that terminal is in video calling, obtaining the user images of terminal camera Real-time Collection;
Face datection unit, for carrying out Face datection to described user images, it is judged that whether the face in described user images is positioned within the setting regions of described user images;
Shooting angle adjustment unit, during for being not located at when the face in described user images within the setting regions of described user images, position according to described face and described setting regions, the face of described user images the shooting angle of described terminal camera is adjusted, so that can be positioned within described setting regions.
8. device photographic head shooting angle being adjusted when video calling according to claim 7, it is characterised in that described Face datection unit includes:
Human face region extracts subelement, for described user images is carried out Face datection, extracts the human face region feature of described user images, and wherein said human face region feature at least includes the centre coordinate of human face region;
Face location judgment sub-unit, for judging whether described centre coordinate is positioned within described setting regions, if, then judge, within the setting regions that the face in described user images is positioned at described user images, otherwise to judge within the setting regions that the face in described user images is not located at described user images.
9. device photographic head shooting angle being adjusted when video calling according to claim 8, it is characterised in that described shooting angle adjustment unit includes:
Side-play amount computation subunit, for calculating described centre coordinate relative to the horizontal offset of the centre coordinate of described setting regions and offset of vertical amount;
Shooting angle adjusts subelement, and for the shooting angle of described terminal camera moves the distance of described horizontal offset in the horizontal direction, in the vertical direction moves the distance of described offset of vertical amount.
10. device photographic head shooting angle being adjusted when video calling according to claim 7, it is characterized in that, described shooting angle adjustment unit includes: successive frame judgment sub-unit, face mean place computation subunit and shooting angle adjust subelement;
Described successive frame judgment sub-unit, during for being not located at when the face in user images described in described Face datection unit judges within the setting regions of described user images, determine whether before continuously, whether the face of N framed user's image is all not located within the setting regions of described user images, if sending control signal to described face mean place computation subunit;
Described face mean place computation subunit, is used for receiving described control signal, calculates user images and the mean place of face in this framed user image of described front N frame continuously;
Described shooting angle adjusts subelement, for according to described mean place and described setting regions, the shooting angle of described terminal camera being adjusted, so that the face of described user images can be positioned within described setting regions;
Wherein, N is the positive integer be more than or equal to 1.
11. device photographic head shooting angle being adjusted when video calling according to claim 7, it is characterized in that, when the face in user images described in described Face datection unit judges is positioned within the setting regions of described user images, described user images acquiring unit, when detecting that terminal is in video calling, continues to obtain the user images of terminal camera Real-time Collection.
12. device photographic head shooting angle being adjusted when video calling according to claim 7, it is characterised in that the setting regions of described user images is for being positioned at the Centromedian rectangular area of described user images.
CN201310432772.8A 2013-09-22 2013-09-22 Method photographic head shooting angle being adjusted when video calling and device CN103475849B (en)

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