CN104238669A - Method and device for controlling rotation of camera of mobile terminal and mobile terminal - Google Patents

Abstract

The present invention is applicable to the field of electronic technology, and provides a method and device for controlling the rotation of a camera of a mobile terminal, and a mobile terminal. The method is applied to a mobile terminal with a touch device on the back, and includes: acquiring a camera control mode after the camera is started; When the camera control mode is the first control mode, the camera is controlled to rotate according to the sliding track of the user's finger on the touch device; when the camera control mode is the second control mode, the camera is controlled to rotate in a preset manner; when detected When the image currently collected by the camera includes the specified image, the camera is controlled to rotate to a position where the object corresponding to the specified image is directly facing. On the one hand, the above method realizes the rear touch control to control the rotation of the camera, and solves the problem that the user cannot see the complete image on the screen of the mobile phone or causes misoperation when touching the screen of the mobile phone with a finger; The way to automatically control the camera rotation.

Description

Method, device and mobile terminal for controlling camera rotation of mobile terminal

technical field

The invention belongs to the field of electronic technology, and in particular relates to a method, a device and a mobile terminal for controlling the rotation of a camera of a mobile terminal.

Background technique

At present, products that can control the rotation of the camera have appeared in the mobile phone market, but the control method of such products is generally controlled manually by the user. When the user manually controls, because the finger needs to touch the touch screen of the mobile phone, the user often cannot see the complete image displayed on the mobile phone screen, and it is easy to cause some misoperations. On the other hand, there is currently no method and product for automatically controlling the rotation of the camera by specifying the object to be photographed and detecting the orientation of the object to be photographed.

Contents of the invention

The purpose of the present invention is to provide a method, device and mobile terminal for controlling the rotation of the camera of a mobile terminal, so as to control the rotation of the camera by touch on the back and control the rotation of the camera by detecting a specified object.

The present invention is realized in this way, a method for controlling the rotation of the camera of a mobile terminal, the back of the mobile terminal is provided with a touch device; the method includes:

After the camera is started, the camera control mode selected by the user is obtained, and the camera control mode includes a first control mode and a second control mode;

When the camera control mode is the first control mode, acquire the sliding track of the user on the touch device, and control the rotation of the camera according to the sliding track;

When the camera control mode is the second control mode, control the rotation of the camera in a preset manner, and detect the image collected by the camera during the rotation; when it is detected that the image currently collected by the camera contains a specified image , the camera is controlled to rotate to a position directly facing the object corresponding to the specified image.

Further, the sliding trajectory includes sliding distance, sliding time and activity direction;

The controlling the rotation of the camera according to the slide track includes:

Calculate the rotational angular velocity of the camera according to the sliding distance and sliding time;

controlling the camera to rotate along the sliding direction according to the rotational angular velocity.

Further, the formula for calculating the rotational angular velocity of the camera according to the sliding distance and sliding time is specifically:

${\mathrm{<span\; class="notranslate">\; h</span>}}^{<span\; class="notranslate">\; \&prime;</span>}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; h</span>}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; S</span>}}^{<span\; class="notranslate">\; \&prime;</span>}}{\mathrm{<span\; class="notranslate">\; S</span>}}$

${\mathrm{<span\; class="notranslate">\; V</span>}}^{<span\; class="notranslate">\; \&prime;</span>}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; h</span>}}^{<span\; class="notranslate">\; \&prime;</span>}}{\mathrm{<span\; class="notranslate">\; t</span>}}$

Wherein, S is the maximum length or width that the user's finger can slide on the touch device, S' is the sliding distance of the user's finger on the touch device, and t is the distance of the user's finger on the touch device. Sliding time, H is the maximum rotatable angle of the camera, H' is the camera rotation angle corresponding to the sliding distance S' of the user's finger on the touch device, and V' is the rotation angular velocity of the camera.

Further, when the camera control mode is the second control mode, control the rotation of the camera according to a preset method, and detect the image collected by the camera during the rotation; when the image currently collected by the camera is detected When the specified image is contained in , controlling the rotation of the camera to a position directly facing the object corresponding to the specified image includes:

When the camera control mode is the second control mode, controlling the camera to rotate at a preset rate;

Detecting images captured by the camera during the rotation process;

When it is detected that the image currently collected by the camera contains a human or animal image, obtain the offset angle and offset of the human or animal relative to the camera according to the position of the human or animal image in the currently collected image direction;

Controlling and controlling the rotation of the camera along the deviation direction according to the deviation angle, so that the rotated camera faces the person or the animal.

Another aspect of the present invention provides a device for controlling the rotation of the camera of a mobile terminal, the device includes a touch device, and the touch device is located on the back of the mobile terminal; the device also includes:

The control mode acquisition module is used to acquire the camera control mode selected by the user after the camera is started, and the camera control mode includes a first control mode and a second control mode;

A first control module, configured to obtain a sliding track of the user on the touch device when the camera control mode is the first control mode, and control the rotation of the camera according to the sliding track;

The second control module is configured to control the rotation of the camera in a preset manner when the camera control mode is the second control mode, and detect the images collected by the camera during the rotation; when it is detected that the camera currently collects When the specified image is included in the specified image, the camera is controlled to rotate to a position facing the object corresponding to the specified image.

Further, the sliding trajectory includes sliding distance, sliding time and activity direction;

The first control module also includes:

a calculation unit, configured to calculate the rotational angular velocity of the camera according to the sliding distance and sliding time,

A first control unit, configured to control the camera to rotate along the sliding direction according to the rotational angular velocity.

Further, the formula for calculating the rotational angular velocity of the camera according to the sliding distance and sliding time is specifically:

${\mathrm{<span\; class="notranslate">\; h</span>}}^{<span\; class="notranslate">\; \&prime;</span>}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; h</span>}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; S</span>}}^{<span\; class="notranslate">\; \&prime;</span>}}{\mathrm{<span\; class="notranslate">\; S</span>}}$

${\mathrm{<span\; class="notranslate">\; V</span>}}^{<span\; class="notranslate">\; \&prime;</span>}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; h</span>}}^{<span\; class="notranslate">\; \&prime;</span>}}{\mathrm{<span\; class="notranslate">\; t</span>}}$

Wherein, S is the maximum length or width that the user's finger can slide on the touch device, S' is the sliding distance of the user's finger on the touch device, and t is the distance of the user's finger on the touch device. Sliding time, H is the maximum rotatable angle of the camera, H' is the camera rotation angle corresponding to the sliding distance S' of the user's finger on the touch device, and V' is the rotation angular velocity of the camera.

Further, the second control module includes:

a first control unit, configured to control the camera to rotate at a preset rate when the camera control mode is the second control mode;

a detection unit, configured to detect images collected by the camera during the rotation;

An acquisition unit, configured to acquire the offset of the person or animal relative to the camera according to the position of the person or animal image in the currently collected image when it is detected that the image currently collected by the camera contains an image of a person or animal. shift angle and shift direction;

The second control unit is configured to control and control the rotation of the camera along the deviation direction according to the deviation angle, so that the rotated camera faces the person or the animal.

A third aspect of the present invention provides a mobile terminal, which includes the above-mentioned device for controlling the rotation of the camera of the mobile terminal.

Compared with the prior art, the present invention sets a touch device on the back of the mobile terminal, and sets two camera control modes, the camera control mode includes a first control mode and a second control mode; When the control mode is the first control mode, the rotation of the camera is controlled according to the sliding track of the user's finger on the touch device, thereby realizing the rear touch control of the rotation of the camera, which solves the problem of touch caused by the finger touching the mobile phone in the prior art. The screen causes the user to not be able to see the complete image displayed on the screen of the mobile phone and causes problems of misoperation; when the camera control mode is the second control mode, the camera is controlled to rotate in a preset manner, and the camera rotation is detected during the rotation process. The image collected by the camera; when it is detected that the image currently collected by the camera contains a specified image, the camera is controlled to rotate to a position facing the object corresponding to the specified image, thereby realizing the detection of the specified object. This method controls the rotation of the camera, which greatly improves the user's experience when shooting.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings on the premise of not paying creative labor.

FIG. 1 is an implementation flowchart of a method for controlling the rotation of a camera of a mobile terminal provided by Embodiment 1 of the present invention;

FIG. 2 is a specific implementation flowchart of step S102 in the method for controlling the rotation of the mobile terminal camera provided by Embodiment 2 of the present invention;

FIG. 3 is a structural diagram of an apparatus for controlling the rotation of a camera of a mobile terminal provided by Embodiment 3 of the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

The embodiment of the present invention provides a method for controlling the rotation of the camera of a mobile terminal, by setting a touch device on the back of the mobile terminal, and setting two camera control modes, the camera control modes include the first control mode and the second control mode Control mode; when the camera control mode is the first control mode, the camera rotation is controlled according to the sliding track of the user's finger on the touch device, thereby realizing the rear touch control camera rotation; when the camera control mode is In the second control mode, control the rotation of the camera according to the preset method, and detect the image collected by the camera during the rotation process; when it is detected that the image currently collected by the camera contains a specified image, then control the rotation of the camera to the position directly facing the object corresponding to the specified image, thereby realizing the automatic control of the rotation of the camera by detecting the specified object, which greatly improves the user's experience when shooting; the embodiment of the present invention also provides a corresponding control movement The device for rotating the terminal camera will be described in detail below.

Embodiment one

FIG. 1 shows the implementation process of the method for controlling the rotation of the camera of a mobile terminal provided by Embodiment 1 of the present invention.

In this embodiment, the method is applied to mobile terminals, and the mobile terminals include but are not limited to smart devices such as mobile phones, tablet computers, and ipads. The mobile terminal is provided with a camera, a motor for controlling the rotation of the camera, a main controller and a touch device. Preferably, the touch control device further includes a touch panel, and the touch panel is arranged on the back of the mobile terminal, that is, on the other side opposite to the touch screen of the mobile terminal.

In this embodiment, the touchpad is an input device for controlling the rotation of the camera with a sliding operation of a finger on a smooth touchpad. The touch panel is made into an array of rows and columns with printed circuits; the printed board and the plastic film on the surface are pasted with strong double-sided adhesive, and the sensing detection principle is capacitive sensing. When the user's finger approaches the touchpad, the capacitance will change, and the touchpad itself will detect the amount of capacitance change and convert it into an instruction to control the rotation of the camera. The touchpad uses capacitive sensing to know the sliding situation of the finger, which is not sensitive to the heat of the finger and consumes less power.

As shown in Figure 1, the method includes:

In step S101, after the camera is started, the camera control mode selected by the user is acquired.

In this embodiment, multiple camera control modes are set, including a first control mode and a second control mode. After the camera is started, selectable camera control modes are displayed to the user in a list, and a selection command input by the user through, for example, clicking or sliding is received to obtain the camera control mode selected by the user.

In step S102, when the camera control mode is the first control mode, acquire a sliding track of the user on the touch device, and control the rotation of the camera according to the sliding track.

After the user selects the first control mode, the mobile terminal will enter the first control mode for the camera. Since the touchpad is arranged on the back of the mobile terminal, the user can hold the mobile terminal and touch the touchpad with the index finger or middle finger, etc., and the touchpad will sense the sliding track of the finger and convert it into The command to control the rotation of the camera is sent to the motor, so that the rotation of the motor drives the rotation of the camera, so as to realize the rear touch control of the rotation of the camera; wherein, the sliding track includes the sliding distance, sliding time and sliding direction of the finger. In this embodiment, since the touchpad is arranged on the back of the mobile terminal, it can free the touch screen of the mobile terminal from the front to the greatest extent, and solve the problem that the existing camera rotation control technology causes the user to be unable to touch the touch screen of the mobile phone due to finger touch See the full image displayed on the phone's screen, as well as the issues that caused the misuse.

Controlling the rotation of the camera on the back will be described in detail in subsequent embodiments, and will not be repeated here.

In step S103, when the camera control mode is the second control mode, control the rotation of the camera in a preset manner, and detect the images collected by the camera during the rotation; When the specified image is contained, the camera is controlled to rotate to a position directly facing the object corresponding to the specified image.

In this embodiment, after the user selects the second control mode, the mobile terminal will enter the second control mode. In the control mode, the specified object input by the user is acquired first. The specified object is preferably a person, an animal (including but not limited to a bird, a dog, a cat, etc.). After obtaining the specified object input by the user, the camera is controlled to rotate up and down or left and right at a constant speed at a preset angular velocity. During the rotation process, the images collected by the camera are detected; when it is detected that the images currently collected by the camera contain human or animal images, the image is acquired according to the position of the human or animal images in the currently collected images The offset angle and offset direction of the person or animal relative to the camera; and then control the rotation of the camera along the offset direction according to the offset angle, so that the rotated camera faces the person or animal. In this way, the rotation of the camera is automatically controlled by detecting the specified object. The user does not need to control and adjust the camera by himself, but only needs to input simple instructions to automatically control the rotation of the camera to face the specified object through image detection and recognition. The position of the camera greatly improves the user's experience when shooting.

Preferably, after the automatic camera rotation is controlled in step S103, if the user thinks that the control is not precise enough, this embodiment also provides a manual control of switching from the second control mode to the first control mode for back touch.

Therefore, after the step S103, it also includes:

Responding to the control mode switching instruction input by the user, switch the camera control mode from the second control mode to the first control mode, return to step S101, obtain the user's sliding track on the touch device, and control the camera according to the sliding track. The camera rotates.

In the embodiment of the present invention, a touch control device is set on the back of the mobile terminal, and two camera control modes are set, including a first control mode and a second control mode; the camera control mode is the first control mode At this time, the rotation of the camera is controlled according to the sliding track of the user's finger on the touch device, so that the rotation of the camera is controlled by touch on the back, which solves the problem that the user cannot see the mobile phone due to the finger touching the touch screen of the mobile phone in the prior art. The complete image displayed on the screen and the problems causing misoperation; when the camera control mode is the second control mode, control the rotation of the camera according to the preset method, and detect the images collected by the camera during the rotation process; When it is detected that the image currently collected by the camera contains a specified image, the camera is controlled to rotate to a position directly facing the object corresponding to the specified image, thereby automatically controlling the rotation of the camera by detecting the specified object, greatly It greatly improves the user's experience when shooting.

Embodiment two

FIG. 2 shows the specific implementation process of step S102 in the method for controlling the rotation of the camera of the mobile terminal provided by Embodiment 1 of the present invention.

In this embodiment, the sliding direction of the user's finger includes sliding in the up and down directions and/or sliding in the left and right directions.

As shown in Figure 2, step S102 specifically includes:

In step S201, in the first control mode, the sliding distance, sliding time and sliding direction of the user's finger on the touch device are acquired.

When the user's finger slides on the touch panel of the touch device, the capacitance on the touch panel will change. This embodiment senses and obtains the sliding distance of the finger on the touch panel by detecting the amount of change in the capacitance, Swipe time and swipe direction.

In step S202, the rotational angular velocity of the camera is calculated according to the sliding distance and sliding time.

Preferably, the formula for calculating the rotational angular velocity of the camera according to the sliding distance and sliding time is specifically:

${\mathrm{<span\; class="notranslate">\; h</span>}}^{<span\; class="notranslate">\; \&prime;</span>}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; h</span>}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; S</span>}}^{<span\; class="notranslate">\; \&prime;</span>}}{\mathrm{<span\; class="notranslate">\; S</span>}}$

${\mathrm{<span\; class="notranslate">\; V</span>}}^{<span\; class="notranslate">\; \&prime;</span>}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; h</span>}}^{<span\; class="notranslate">\; \&prime;</span>}}{\mathrm{<span\; class="notranslate">\; t</span>}}$

Wherein, S is the maximum length or width that the user's finger can slide on the touch device, S' is the sliding distance of the user's finger on the touch device, and t is the distance of the user's finger on the touch device. Sliding time, H is the maximum rotatable angle of the camera, H' is the camera rotation angle corresponding to the sliding distance S' of the user's finger on the touch device, and V' is the rotation angular velocity of the camera.

The maximum length or width S that the user's finger can slide on the touchpad and the maximum rotatable angle H of the camera are set when the mobile terminal leaves the factory.

It can be seen from the above formula that after obtaining the sliding distance and sliding time of the user's finger on the touchpad, firstly, according to the sliding distance S' of the user's finger on the touchpad and the maximum length or width S that the finger can slide on the touchpad The ratio of the user's finger on the touchpad to calculate the camera rotation angle H' corresponding to the sliding distance S'. Then, according to the ratio of the camera rotation angle H' corresponding to the sliding distance S' of the user's finger on the touch panel to the sliding time t of the finger on the touch panel, the rotational angular velocity V' of the camera is obtained.

In step S203, it is determined whether the sliding direction is sliding in the up-down direction.

If yes, execute step S204; otherwise, execute step S205.

In step S204, the camera is controlled to rotate in the up and down direction according to the calculated rotation angular velocity.

In step S205, it is determined whether the sliding direction is sliding along the left and right directions.

If yes, perform step S206; otherwise, do not perform any operation.

In step S206, the camera is controlled to rotate in the left-right direction according to the calculated rotational angular velocity.

In the embodiment of the present invention, by setting a touch device on the back of the mobile terminal, the sliding distance, sliding time and sliding direction of the user's finger are obtained through the touch panel of the touch device, and according to the sliding distance and sliding Calculate the angular velocity of rotation of the camera in time, and finally control the rotation of the camera according to the angular velocity of rotation and the direction of rotation of the camera, thereby realizing the rear touch control camera rotation; further, since the touchpad is arranged on the back of the mobile terminal, it can It liberates the touch screen of the mobile terminal positively to the greatest extent, and solves the problem in the prior art that the user cannot see the complete image displayed on the screen of the mobile phone and causes misoperation due to fingers touching the touch screen of the mobile phone.

Embodiment Three

FIG. 3 shows the composition structure of the device for controlling the rotation of the camera of the mobile terminal provided by the third embodiment of the present invention. For the convenience of description, only the parts related to the present invention are shown.

In this embodiment, the device for controlling the rotation of the camera of the mobile terminal is applied to the mobile terminal, so as to implement the method for controlling the rotation of the camera of the mobile terminal described in the embodiment in FIG. 1 and FIG. 2 . The mobile terminal includes, but is not limited to, a mobile phone with a camera, a tablet computer, an ipad, and the like.

As shown in Figure 3, the device includes:

A control mode acquiring module 31, configured to acquire the camera control mode selected by the user after the camera is started, and the camera control mode includes a first control mode and a second control mode;

The first control module 32 is configured to acquire the sliding track of the user on the touch device when the camera control mode is the first control mode, and control the rotation of the camera according to the sliding track;

In this embodiment, the device further includes a touch module 34, the touch module includes a touch panel, and the touch panel is preferably arranged on the back of the mobile terminal.

The second control module 33 is used to control the rotation of the camera in a preset manner when the camera control mode is the second control mode, and detect the images collected by the camera during the rotation; when it is detected that the camera is currently collecting When the received image contains the specified image, the camera is controlled to rotate to a position facing the object corresponding to the specified image.

The first control module 32 includes:

The obtaining unit 321 is configured to obtain a sliding track of the user's finger on the touch device.

Optionally, the sliding track of the user's finger on the touch device includes a sliding distance, a sliding time, and a sliding direction.

A calculation unit 322, configured to calculate the rotational angular velocity of the camera according to the sliding distance and sliding time,

The first control unit 323 is configured to control the camera to rotate along the sliding direction according to the rotational angular velocity.

Preferably, the sliding direction includes sliding in the up-down direction and sliding in the left-right direction.

Optionally, the calculation unit 322 calculates the rotation angular velocity of the camera according to the sliding distance and the sliding time. The formula is specifically:

${\mathrm{<span\; class="notranslate">\; h</span>}}^{<span\; class="notranslate">\; \&prime;</span>}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; h</span>}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; S</span>}}^{<span\; class="notranslate">\; \&prime;</span>}}{\mathrm{<span\; class="notranslate">\; S</span>}}$

${\mathrm{<span\; class="notranslate">\; V</span>}}^{<span\; class="notranslate">\; \&prime;</span>}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; h</span>}}^{<span\; class="notranslate">\; \&prime;</span>}}{\mathrm{<span\; class="notranslate">\; t</span>}}$

Wherein, S is the maximum length or width that the user's finger can slide on the touch device, S' is the sliding distance of the user's finger on the touch device, and t is the distance of the user's finger on the touch device. Sliding time, H is the maximum rotatable angle of the camera, H' is the camera rotation angle corresponding to the sliding distance S' of the user's finger on the touch device, and V' is the rotation angular velocity of the camera.

The maximum length or width S that the user's finger can slide on the touch panel and the maximum rotatable angle H of the camera are set when the mobile terminal leaves the factory.

Optionally, the identification control module 33 includes:

The first control unit 331 is configured to control the camera to rotate at a preset rate when the camera control mode is the second control mode;

A detection unit 332, configured to detect images collected by the camera during the rotation process;

The acquisition unit 333 is configured to acquire the position of the person or animal relative to the camera according to the position of the person or animal image in the currently collected image when it is detected that the image currently collected by the camera contains a human or animal image. Offset angle and offset direction;

The second control unit 334 is configured to control and control the rotation of the camera along the deviation direction according to the deviation angle, so that the rotated camera faces the person or the animal.

As an implementation example of the present invention, the animal may be a bird, a cat, a dog, or the like.

Preferably, after the rotation of the camera is controlled by the second control module, if the user thinks that the control is not precise enough, this embodiment also provides the function of switching from the second control mode to the first control mode to manually control the rotation of the camera on the back.

Therefore, the device also includes a mode switching module. The mode switching module is specifically used for:

In response to the control mode switching command input by the user, switch the camera control mode from the second control mode to the first control mode, return to the first control module, and control the rotation of the camera according to the sliding track of the user's finger on the touch device.

In the embodiment of the present invention, a touch device is set on the back of the mobile terminal, and two camera control modes are set, and the camera control mode includes a first control mode and a second control mode; In the first control mode, the rotation of the camera is controlled according to the sliding track of the user's finger on the touch device, thereby realizing the rear touch control of the rotation of the camera, which solves the problem of the user's finger touching the touch screen of the mobile phone in the prior art. Can not see the complete image displayed on the screen of the mobile phone and the problem of causing misoperation; when the camera control mode is the second control mode, control the rotation of the camera according to the preset method, and detect the camera acquisition during the rotation process When it is detected that the image currently collected by the camera contains a specified image, the camera is controlled to rotate to a position directly facing the object corresponding to the specified image, thereby realizing automatic control by detecting the specified object The camera rotates, which greatly improves the user's shooting experience.

Those of ordinary skill in the art can also understand that all or part of the steps in the method of the above embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, so The storage medium mentioned above includes ROM/RAM, magnetic disk, optical disk, etc.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For example, each module is only divided according to the functional logic, but it is not limited to the above-mentioned division, as long as the corresponding function can be realized; in addition, the specific names of each functional module are only for the convenience of distinguishing each other, and are not used to limit this protection scope of the invention.

Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (9)

1. control the method that mobile terminal camera rotates, it is characterized in that, the back side of described mobile terminal is provided with contactor control device; Described method comprises:

After camera starts, obtain the camera control model that user selects, described camera control model comprises the first control model and the second control model;

When described camera control model is the first control model, obtain the sliding trace of user on described contactor control device, control described camera according to described sliding trace and rotate;

When described camera control model is the second control model, controls described camera by predetermined manner and rotate, and detect the image that camera collection described in rotary course arrives; When detect in the current image collected of camera comprise specify image time, then control described camera and rotate to the just right position of the object corresponding with described appointment image.

2. the method controlling mobile terminal camera and rotate as claimed in claim 1, it is characterized in that, described sliding trace comprises sliding distance, sliding time and activity direction;

Described according to described sliding trace control described camera rotate comprise:

The angular velocity of rotation of described camera is calculated according to described sliding distance and sliding time;

Control described camera to rotate along described glide direction according to described angular velocity of rotation.

3. the method controlling mobile terminal camera and rotate as claimed in claim 2, it is characterized in that, the described formula calculating the angular velocity of rotation of described camera according to described sliding distance and sliding time is specially:

$H^{\&prime;}=\frac{H\&times;S^{\&prime;}}{S}$

$V^{\&prime;}=\frac{H^{\&prime;}}{t}$

Wherein, S is user's finger slidable maximum length or width on described contactor control device, S' is the sliding distance that user points on described contactor control device, t is the sliding time that user points on described contactor control device, H is the maximum angle rotatable of described camera, H' is that user points rotation angle of camera corresponding to sliding distance S' on described contactor control device, and V' is the angular velocity of rotation of camera.

4. the method controlling mobile terminal camera and rotate as claimed in claim 1, it is characterized in that, described when described camera control model is the second control model, control described camera by predetermined manner and rotate, and detect the image that camera collection described in rotary course arrives; When detect in the current image collected of camera comprise specify image time, then control the position that described camera rotates to the object corresponding with described appointment image just right and comprise:

When described camera control model is the second control model, controls described camera and rotate with scheduled rate;

Detect the image that described in rotary course, camera collection arrives;

When detect comprise people or animal painting in the current image collected of camera time, according to described people or animal painting, people described in the position acquisition in the image of current collection or animal are relative to the deviation angle of described camera and offset direction;

Control camera according to described deviation angle to rotate along described offset direction, to make postrotational camera just to described people or animal.

5. control the device that mobile terminal camera rotates, it is characterized in that, described device comprises contactor control device, and described contactor control device is positioned at the back side of described mobile terminal;

Described device also comprises:

Control model acquisition module, for after camera starts, obtain the camera control model that user selects, described camera control model comprises the first control model and the second control model;

First control module, for when described camera control model is the first control model, obtains the sliding trace of user on described contactor control device, controls described camera rotate according to described sliding trace;

Second control module, for when described camera control model is the second control model, controls described camera by predetermined manner and rotates, and detect the image that camera collection described in rotary course arrives; When detect in the current image collected of camera comprise specify image time, then control described camera and rotate to the just right position of the object corresponding with described appointment image.

6. the device controlling mobile terminal camera and rotate as claimed in claim 5, it is characterized in that, described sliding trace comprises sliding distance, sliding time and activity direction;

Described first control module also comprises:

Computing unit, for calculating the angular velocity of rotation of described camera according to described sliding distance and sliding time,

First control module, rotates along described glide direction according to described angular velocity of rotation for controlling described camera.

7. the device controlling mobile terminal camera and rotate as claimed in claim 6, it is characterized in that, the described formula calculating the angular velocity of rotation of camera according to described sliding distance and sliding time is specially:

$H^{\&prime;}=\frac{H\&times;S^{\&prime;}}{S}$

$V^{\&prime;}=\frac{H^{\&prime;}}{t}$

Wherein, S is user's finger slidable maximum length or width on described contactor control device, S' is the sliding distance that user points on described contactor control device, t is the sliding time that user points on described contactor control device, H is the maximum angle rotatable of described camera, H' is that user points rotation angle of camera corresponding to sliding distance S' on described contactor control device, and V' is the angular velocity of rotation of camera.

8. the device controlling mobile terminal camera and rotate as claimed in claim 5, it is characterized in that, described second control module comprises:

First control module, for when described camera control model is the second control model, controls described camera and rotates with scheduled rate;

Detecting unit, for detecting the image that camera collection described in rotary course arrives;

Acquiring unit, for when detect comprise people or animal painting in the current image collected of camera time, according to described people or animal painting, people described in the position acquisition in the image of current collection or animal are relative to the deviation angle of described camera and offset direction;

Second control module, rotates along described offset direction for controlling camera according to described deviation angle, to make postrotational camera just to described people or animal.

9. a mobile terminal, is characterized in that, described mobile terminal comprises the device that the control mobile terminal camera as described in any one of claim 5 to 8 rotates.