KR20130057302A - Mobile terminal and operation method thereof - Google Patents

Abstract

PURPOSE: A portable terminal and an operating method thereof are provided to perform consecutive shot photographing by using sequentially using two cameras for 3D image generation. CONSTITUTION: If a consecutive shot photographing mode is selected in a camera menu, a control unit displays a preview image obtained through a first camera on a display unit(S300,S305). If photographing is selected, the control unit generates an image by using the first camera(S310,S315). The control unit generates the image by using a second camera in a standby state(S320). The control unit repeats the image obtaining process until the termination of the consecutive shot photographing(S325). [Reference numerals] (AA) Start; (BB) End; (S300) Select a consecutive shot photographing mode; (S305) Display a camera preview screen; (S310) Select photographing?; (S315) Generate an image using a first camera; (S320) Generate an image using a second camera; (S325) Complete the photographing?; (S330) Select the other functions?; (S335) Perform an operation corresponding to the selected function; (S340) Complete the consecutive shot photographing mode?

Description

Mobile terminal and operation method thereof

The present invention relates to a portable terminal and a method for operating the same, and more particularly, to a portable terminal and a method of operating the same, which can be continuously photographed using two cameras used for generating a 3D stereoscopic image.

A portable terminal is a portable device having one or more functions capable of carrying out voice and video communication, capable of inputting and outputting information, and storing data, while being portable. As the functions of the portable terminal have diversified, they have complicated functions such as photographing and photographing, playing music files and video files, receiving games, receiving broadcasts, and wireless internet, and have developed a comprehensive multimedia player, .

In the mobile terminal implemented in the form of such a multimedia device, new attempts have been applied in various ways in terms of hardware and software to implement complex functions. For example, a user interface environment for a user to search for or select a function easily and conveniently.

Recently, a technique of generating a 3D stereoscopic image by combining a plurality of images photographed by a camera through an image processing process is also used. When such a technique is applied to a portable terminal, a three-dimensional stereoscopic image may be generated using two or more cameras provided in the portable terminal, and the 3D stereoscopic image may be displayed through a display unit provided in the portable terminal.

In addition, continuous shooting can be performed using a camera provided in the portable terminal. Continuous shooting means taking multiple images when you press the shutter, which can be useful for capturing moving objects or capturing human facial expressions.

The good and bad of the continuous shooting function can be judged by the continuous shutter interval per second and the maximum number of shots. The number of shots per second literally means how many images can be taken per second.

However, when the shutter speed is increased to increase the burst interval per second during continuous shooting, the time for receiving light through the lens of the camera is reduced, so that the brightness of the captured image is reduced. In addition, since the number of shots per second or the maximum number of shots in the continuous shooting mode varies depending on the resolution, it is necessary to shoot with a lower resolution image than in normal shooting in order to increase the burst interval per second.

Therefore, in the case of a portable terminal provided with a 3D photographing mode capable of generating a 3D stereoscopic image, it is necessary to consider a method of improving performance of continuous shooting by using two cameras in continuous shooting.

Accordingly, an object of the present invention is to provide a portable terminal capable of performing continuous shooting by using two cameras used for generating a 3D stereoscopic image and an operation control method thereof.

In accordance with another aspect of the present invention, there is provided a method of operating a mobile terminal, the method including: providing a first camera having a first image sensor and a second camera having a second image sensor; And alternately using the first and second cameras to generate a continuous shooting image.

In addition, the portable terminal according to the present invention uses a display unit, a first camera having a first image sensor, a second camera having a second image sensor, and alternately using the first and the first cameras during continuous shooting. And a controller configured to generate the continuously photographed image.

According to the present invention, continuous shooting can be performed by using two cameras for generating 3D stereoscopic images sequentially. Accordingly, it is possible to provide a continuous shooting shooting function in which the continuous shooting interval per second and the number of stored shots per second are improved without deterioration in image quality. In addition, a panorama image may be generated by combining a plurality of continuous shooting images into one continuous image.

1 is a block diagram of a portable terminal according to an embodiment of the present invention;
2 is a perspective view of a portable terminal according to an embodiment of the present invention;
3 is a rear perspective view of the mobile terminal shown in FIG. 2;
4 is a view referred to explain the configuration of a portable terminal according to an embodiment of the present invention;
FIG. 5 is a diagram for explaining a method of photographing a burst in a mobile terminal according to one embodiment of the present invention; FIG.
6 is a flowchart provided to explain a method of operating a mobile terminal according to an embodiment of the present invention; and
FIG. 7 is a diagram referred to for describing a method of operating a mobile terminal according to an embodiment of the present disclosure.

Hereinafter, with reference to the drawings will be described the present invention in more detail.

The portable terminal described in the present specification includes a tablet computer, a mobile phone, a smart phone, a notebook computer, a digital broadcasting terminal, a personal digital assistant (PDA), a portable multimedia player (PMP), Camera, navigation, and the like. In addition, suffixes "module" and " part "for the components used in the following description are given merely for convenience of description, and do not give special significance or role in themselves. Accordingly, the terms "module" and "part" may be used interchangeably.

FIG. 1 is a block diagram of a portable terminal according to an exemplary embodiment of the present invention. Referring to FIG. Referring to FIG. 1, a mobile terminal according to an embodiment of the present invention will be described in terms of components according to functions.

1, the portable terminal 100 includes a wireless communication unit 110, an A / V input unit 120, a user input unit 130, a sensing unit 140, an output unit 150, A memory 160, an interface unit 170, a control unit 180, and a power supply unit 190. Such components may be configured by combining two or more components into one component, or by dividing one or more components into two or more components as necessary when implemented in an actual application.

The wireless communication unit 110 may include a broadcast receiving module 111, a mobile communication module 113, a wireless Internet module 115, a short distance communication module 117, and a GPS module 119.

The broadcast receiving module 111 receives at least one of a broadcast signal and broadcast related information from an external broadcast management server through a broadcast channel. At this time, the broadcast channel may include a satellite channel, a terrestrial channel, and the like. The broadcast management server may refer to a server for generating and transmitting at least one of a broadcast signal and broadcast related information and a server for receiving at least one of the generated broadcast signal and broadcast related information and transmitting the broadcast signal to the terminal.

The broadcast-related information may mean information related to a broadcast channel, a broadcast program, or a broadcast service provider. The broadcast signal may include a TV broadcast signal, a radio broadcast signal, a data broadcast signal, and a broadcast signal in which a data broadcast signal is combined with a TV broadcast signal or a radio broadcast signal. The broadcast related information may also be provided through a mobile communication network, and in this case, may be received by the mobile communication module 113. Broadcast-related information can exist in various forms. For example, it may exist in the form of Electronic Program Guide (EPG) of Digital Multimedia Broadcasting (DMB) or Electronic Service Guide (ESG) of Digital Video Broadcast-Handheld (DVB-H).

The broadcast receiving module 111 receives broadcast signals using various broadcasting systems. In particular, the broadcast receiving module 111 may be a Digital Multimedia Broadcasting-Terrestrial (DMB-T), a Digital Multimedia Broadcasting-Satellite (DMB-S) ), Digital Video Broadcast-Handheld (DVB-H), Integrated Services Digital Broadcast-Terrestrial (ISDB-T), and the like. In addition, the broadcast receiving module 111 may be configured to be suitable for all broadcasting systems that provide broadcasting signals, as well as the digital broadcasting system. The broadcast signal and / or broadcast related information received through the broadcast receiving module 111 may be stored in the memory 160.

The mobile communication module 113 transmits and receives a radio signal to at least one of a base station, an external terminal, and a server on a mobile communication network. Here, the wireless signal may include various types of data according to a voice call signal, a video call signal, or a text / multimedia message transmission / reception.

The wireless Internet module 115 refers to a module for wireless Internet access, and the wireless Internet module 115 can be embedded in the mobile terminal 100 or externally. Wireless Internet technologies may include Wireless LAN (Wi-Fi), Wireless Broadband (Wibro), World Interoperability for Microwave Access (Wimax), High Speed Downlink Packet Access (HSDPA), and the like.

The short-range communication module 117 refers to a module for short-range communication. Bluetooth, radio frequency identification (RFID), infrared data association (IrDA), ultra wideband (UWB), ZigBee, and the like can be used as the short distance communication technology.

A GPS (Global Position System) module 119 receives position information from a plurality of GPS satellites.

The A / V (Audio / Video) input unit 120 is for inputting an audio signal or a video signal, and may include a camera 121 and a microphone 123. The camera 121 processes image frames such as still images or moving images obtained by the image sensor in the video call mode or the photographing mode. Then, the processed image frame can be displayed on the display unit 151. [

The image frame processed by the camera 121 may be stored in the memory 160 or transmitted to the outside through the wireless communication unit 110. [ The camera 121 may be equipped with two or more cameras according to the configuration of the terminal.

The microphone 123 receives an external sound signal by a microphone in a communication mode, a recording mode, a voice recognition mode, or the like, and processes it as electrical voice data. The processed voice data can be converted into a form that can be transmitted to the mobile communication base station through the mobile communication module 113 and output when the voice data is in the call mode. The microphone 123 may be a variety of noise reduction algorithms for eliminating noise generated in receiving an external sound signal.

The user input unit 130 generates key input data that the user inputs to control the operation of the terminal. The user input unit 130 may include a key pad, a dome switch, and a touch pad (static / static) capable of receiving commands or information by a push or touch operation of a user. In addition, the user input unit 130 may be configured as a jog wheel or a jog method or a joystick that rotates a key, a finger mouse, or the like. Particularly, when the touch pad has a mutual layer structure with the display unit 151 described later, it can be called a touch screen.

The sensing unit 140 senses the current state of the portable terminal 100 such as the open / close state of the portable terminal 100, the position of the portable terminal 100, Thereby generating a sensing signal. For example, when the mobile terminal 100 is in the form of a slide phone, it may sense whether the slide phone is opened or closed. In addition, it may be responsible for sensing functions related to whether the power supply unit 190 is supplied with power, whether the interface unit 170 is coupled to an external device, and the like.

The sensing unit 140 may include a detection sensor 141, a pressure sensor 143, a motion sensor 145, and the like. The detection sensor 141 detects the presence of an object approaching the portable terminal 100 or an object existing in the vicinity of the portable terminal 100 without mechanical contact. The detection sensor 141 may detect a proximity object by using a change in an alternating magnetic field or a change in a static magnetic field, or using a change rate of capacitance. The sensor 141 may be provided with two or more according to the configuration aspect.

The pressure sensor 143 can detect whether the pressure is applied to the portable terminal 100, the magnitude of the pressure, and the like. The pressure sensor 143 may be installed at a portion where the pressure of the portable terminal 100 is required depending on the use environment. If the pressure sensor 143 is installed in the display unit 151, a touch input through the display unit 151 and a greater pressure than the touch input are applied according to a signal output from the pressure sensor 143. The pressure touch input can be identified. Also, the magnitude of the pressure applied to the display unit 151 at the time of the pressure touch input can be determined according to the signal output from the pressure sensor 143. [

The motion sensor 145 detects the position and movement of the portable terminal 100 using an acceleration sensor, a gyro sensor, or the like. An acceleration sensor that can be used for the motion sensor 145 is a device that converts an acceleration change in one direction into an electric signal and is widely used along with the development of MEMS (micro-electromechanical systems) technology. The acceleration sensor measures the acceleration of a small value built in the airbag system of an automobile and recognizes the minute motion of the human hand and measures the acceleration of a large value used as an input means such as a game There are various types. Acceleration sensors are usually constructed by mounting two or three axes in one package. Depending on the usage environment, only one axis of Z axis is required.

The gyro sensor is a sensor for measuring the angular velocity, and it can sense the direction of rotation with respect to the reference direction.

The output unit 150 is for outputting an audio signal, a video signal, or an alarm signal. The output unit 150 may include a display unit 151, an audio output module 153, an alarm unit 155, and a haptic module 157.

The display unit 151 displays and outputs information processed by the mobile terminal 100. For example, when the portable terminal 100 is in the call mode, a UI (User Interface) or a GUI (Graphic User Interface) associated with a call is displayed. When the portable terminal 100 is in the video communication mode or the photographing mode, the photographed or received images can be displayed individually or simultaneously, and the UI and the GUI are displayed.

Meanwhile, as described above, when the display unit 151 and the touch pad have a mutual layer structure to constitute a touch screen, the display unit 151 may be an input device capable of inputting information by a user's touch in addition to the output device Can also be used.

If the display unit 151 is configured as a touch screen, it may include a touch screen panel, a touch screen panel controller, and the like. In this case, the touch screen panel is a transparent panel attached to the outside, and can be connected to the internal bus of the portable terminal 100. The touch screen panel keeps a watch on the contact result, and if there is a touch input, sends the corresponding signals to the touch screen panel controller. The touch screen panel controller processes the signals, and then transmits corresponding data to the controller 180 so that the controller 180 can determine whether the touch input has been made and which area of the touch screen has been touched.

The display unit 151 may be formed of an e-paper. Electronic paper (e-Paper) is a kind of reflective display, and has excellent visual characteristics such as high resolution, wide viewing angle and bright white background as conventional paper and ink. The electronic paper (e-paper) can be implemented on any substrate such as plastic, metal, paper, and the image is retained even after the power is shut off, and the battery life of the portable terminal 100 is long Can be maintained. As the electronic paper, a hemispherical twist ball filled with a telephone can be used, or an electrophoresis method and a microcapsule can be used.

In addition, the display unit 151 may be a liquid crystal display, a thin film transistor-liquid crystal display, an organic light-emitting diode, a flexible display, a three- (3D display). In addition, two or more display units 151 may exist according to the implementation form of the mobile terminal 100. For example, the portable terminal 100 may include an external display unit (not shown) and an internal display unit (not shown) at the same time.

The audio output module 153 outputs audio data received from the wireless communication unit 110 or stored in the memory 160 in a call signal reception mode, a call mode or a recording mode, a voice recognition mode, a broadcast reception mode, The sound output module 153 outputs sound signals related to functions performed in the portable terminal 100, for example, a call signal reception tone, a message reception tone, and the like. The sound output module 153 may include a speaker, a buzzer, and the like.

The alarm unit 155 outputs a signal for notifying the occurrence of an event of the portable terminal 100. Examples of events occurring in the portable terminal 100 include call signal reception, message reception, and key signal input. The alarm unit 155 outputs a signal for notifying the occurrence of an event in a form other than an audio signal or a video signal. For example, it is possible to output a signal in a vibration mode. The alarm unit 155 can output a signal to notify when a call signal is received or a message is received. Also. When the key signal is inputted, the alarm unit 155 can output a signal as a feedback to the key signal input. The user may recognize the occurrence of an event through the signal output from the alarm unit 155. A signal for notifying the occurrence of an event in the portable terminal 100 may also be output through the display unit 151 or the sound output module 153. [

The haptic module 157 generates various tactile effects that the user can feel. A typical example of the haptic effect generated by the haptic module 157 is a vibration effect. When the haptic module 157 generates vibration with a haptic effect, the intensity and pattern of the vibration generated by the haptic module 157 can be converted, and the different vibrations can be synthesized and output or sequentially output.

In addition to the vibration, the haptic module 157 may be provided with a function of stimulating by a pin arrangement vertically moving with respect to the contact skin surface, an effect of stimulating air through the injection or suction force of the air through the injection port or the suction port, The effect of stimulation through contact of an electrode (eletrode), the effect of stimulation by electrostatic force, and the effect of reproducing a cold sensation using a device capable of endothermic or exothermic can be generated. The haptic module 157 can be implemented not only to transmit the tactile effect through direct contact but also to feel the tactile effect through the muscular sense of the user's finger or arm. The haptic module 157 may include two or more haptic modules 157 according to the configuration of the portable terminal 100.

The memory 160 may store a program for processing and controlling the control unit 180 and may store a function for temporarily storing input or output data (e.g., a phone book, a message, a still image, .

The memory 160 may be a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, SD or XD memory), a RAM , And a ROM. ≪ / RTI > In addition, the portable terminal 100 may operate a web storage for storing the memory 150 on the Internet.

The interface unit 170 serves as an interface with all external devices connected to the portable terminal 100. Examples of the external device connected to the portable terminal 100 include a wired / wireless headset, an external charger, a wired / wireless data port, a memory card, a SIM (Subscriber Identification Module) card, a UIM An audio input / output (I / O) terminal, a video I / O (input / output) terminal, and an earphone. The interface unit 170 receives data from the external device or receives power from the external device and transmits the data to each component in the portable terminal 100 so that data in the portable terminal 100 can be transmitted to the external device .

The interface unit 170 is a path through which power from the cradle connected when the portable terminal 100 is connected to the external cradle is supplied to the portable terminal 100 or various command signals inputted from the cradle by the user are carried And may be a passage to be transmitted to the terminal 100.

The controller 180 typically controls the operation of the respective units to control the overall operation of the mobile terminal 100. For example, voice communication, data communication, video communication, and the like. In addition, the control unit 180 may include a multimedia playback module 181 for multimedia playback. The multimedia playback module 181 may be configured in hardware in the controller 180 or separately from software in the controller 180. [

The power supply unit 190 receives external power and internal power under the control of the controller 180 and supplies power necessary for operation of the respective components.

The mobile terminal 100 having such a configuration can be configured to be operable in a communication system capable of transmitting data through a frame or a packet, including a wired / wireless communication system and a satellite-based communication system. have.

2 is a perspective view of the portable terminal according to an embodiment of the present invention, and FIG. 3 is a rear perspective view of the portable terminal illustrated in FIG. 2. Hereinafter, the portable terminal according to the present invention will be described with reference to FIGS. 2 and 3 in terms of components according to the external form. Hereinafter, for convenience of description, a bar-type portable terminal having a front touch screen among various types of portable terminals such as a folder type, a bar type, a swing type, a slider type, etc. will be described as an example. However, the present invention is not limited to a bar-type portable terminal, but can be applied to all types of portable terminals including the above-mentioned type.

Referring to FIG. 2, the case constituting the outer appearance of the portable terminal 100 is formed by the front case 100-1 and the rear case 100-2. Various electronic components are incorporated in the space formed by the front case 100-1 and the rear case 100-2. The front case 100-1 and the rear case 100-2 may be formed by injecting a synthetic resin, or may be formed to have a metal material such as stainless steel (STS) or titanium (Ti).

The display unit 151, the first sound output module 153a, the first camera 121a, and the first through third user input units 130a, 130b, and 130c are connected to the main body, specifically, the front case 100-1 . A fourth user input unit 130d, a fifth user input unit 130e, and a microphone 123 may be disposed on a side surface of the rear case 100-2.

The display unit 151 may be constructed such that the touch pad is overlapped with the layer structure so that the display unit 151 operates as a touch screen so that information can be input by a user's touch.

The first acoustic output module 153a may be implemented in the form of a receiver or a speaker. The first camera 121a may be implemented in a form suitable for capturing an image or a moving image of a user. The microphone 123 may be implemented in a form suitable for receiving a user's voice, other sounds, and the like.

The first through fifth user input units 130a 130b 130c 130d and 130e and the sixth and seventh user input units 130f and 130g described below may be collectively referred to as a user input unit 130, Any manner can be employed in a tactile manner.

For example, the user input unit 130 may be implemented as a dome switch or a touch pad capable of receiving a command or information by a user's push or touch operation, or a wheel or jog method of rotating a key, or a manipulation method such as a joystick. May also be implemented. In functional terms, the first to third user input units 130a, 130b, and 130c are for inputting a call, a mouse point movement or a screen scroll, start, end, and the like. The fourth user input unit 130b is for inputting a selection of an operation mode and the like. In addition, the fifth user input unit 130c may operate as a hot-key for activating a special function in the mobile terminal 100.

Referring to FIG. 3, the second camera 121b may be additionally mounted on the rear surface of the rear case 100-2, and the sixth and seventh user inputs 130f and 130g may be provided on the side of the second body 100B. ) And the interface unit 170 may be disposed.

The two cameras 121b and 121c disposed on the rear surface have a photographing direction substantially opposite to the camera 121a disposed on the front surface, and may have different pixels. The two cameras 121b and 121c disposed on the rear surface may be used simultaneously to generate a 3D stereoscopic image in a 3D photographing mode for capturing a 3D stereoscopic image, or may be independently used to generate 2D images. In addition, the distance between the two cameras 121b and 121c disposed on the rear side may be adjusted to adjust the size and the pixel of the 3D stereoscopic image that can be generated through the two cameras 121b and 121c. It may be. For this configuration, one of the two cameras 121b and 121c may be moved to the left and right, and the distance between the two cameras 121b and 121c may be adjusted.

On the rear side, a flash 125 and a mirror (not shown) may be further disposed between the two cameras 121b and 121c. The flash 125 emits light toward the subject when the subject is photographed by the two cameras 121b and 121c. The mirror allows the user to look at his / her own face or the like when he / she wants to photograph himself (self-shooting).

A second sound output module (not shown) may be further disposed in the rear case 100-2. The second sound output module may implement the stereo function together with the first sound output module 153a, and may be used for talking in the speakerphone mode.

The interface unit 170 can be used as a path for exchanging data with an external device. In addition, an antenna (not shown) for receiving a broadcast signal may be disposed in one area of the proton case 100-1 and the rear case 100-2. The antenna may be installed to be capable of being drawn out from the rear case 100-2.

A power supply unit 190 for supplying power to the portable terminal 100 may be mounted on the rear case 100-2. The power supply unit 190 may be a rechargeable battery, for example, and may be detachably coupled to the rear case 100-2 for charging or the like.

4 is a view referred to explain the configuration of a portable terminal according to an embodiment of the present invention. The mobile terminal 100 according to the present invention may generate a 3D stereoscopic image by using two cameras 121b and 121c at the rear of the main body. For convenience of description, the two cameras 121b and 121c disposed on the rear surface are referred to as a first camera 121b and a second camera 121c, respectively.

Referring to FIG. 4, when photographing a subject through the first and second cameras 121b and 121c, an image photographed by the first camera 121b and the second camera 121c may be generated. The parallax of the two images may be used to generate a stereoscopic 3D image.

Here, the 3D stereoscopic image refers to an image that allows the user to feel the gradual depth and reality where an object is placed on a monitor or screen in the same way as the real space. In 3D stereoscopic images, when two eyes see different two-dimensional images and the images are transmitted to the brain through the retina, the 3D stereoscopic images are fused to make the stereoscopic image feel the depth and reality. The binocular disparity made by the position of the eyes of a person approximately 65 mm apart gives a three-dimensional impression. Binocular disparity is the most important factor that all three-dimensional display devices must satisfy.

The 3D stereoscopic image generated by the controller 180 may be displayed as a 3D stereoscopic image through the display unit 151. You can also print 3D photos using dedicated photo paper and equipment. In addition to shooting still images, 3D stereoscopic images may be generated in the same manner.

The 3D stereoscopic image may be represented by a stereoscopic method using glasses, an auto-steroscopic method using glasses, and a projection method using holographic. Stereoscopic methods are widely used in home TVs, and portable terminals are mainly used in an autostereoscopic method.

In addition, since the 3D stereoscopic image may be generated in the region 200 where the photographing ranges of the first and second cameras 121b and 121c overlap, the resolution 215 of the 3D stereoscopic image actually generated is the first camera 121b. ) May be smaller than the resolution 210 that can be taken with a second resolution or the resolution 213 that can be taken with a second camera 121c.

FIG. 5 is a diagram for explaining a method of performing continuous shooting in a mobile terminal according to one embodiment of the present invention; FIG.

Continuous shooting means creating multiple images when you press the shutter once. Continuous shooting can be useful for taking pictures of moving objects and capturing changes in human expression. For example, when shooting a fast-moving object, a single shot may be taken before the subject enters the angle, or the shot may be taken after the object has passed, resulting in an empty space. The probability of getting is increased. In addition, continuous shooting, such as shooting a baby's facial expressions that change instantaneously, or if you need to study by shooting a continuous motion such as sports can be very useful.

Referring to FIG. 5, when the continuous shooting mode is selected, the preview image is displayed through the first camera 121b, and the second camera 121c is immediately switched to the standby state capable of capturing the image. In this state, when the photographing signal is input, the first camera 121b captures an image, stores the captured image, and then switches to a standby state in which the image can be captured. Subsequently, the second camera 121c in the standby state captures an image, stores the captured image, and then switches to the standby state. This process is repeatedly performed until the continuous shooting.

In this way, the continuous shooting performance can be improved by using the first camera 121b and the second camera 121b sequentially, compared with the case of using one camera. That is, in case of using one camera, in order to capture the image after storing the captured image, it is necessary to have a stable time by switching modes. In contrast, when the first camera 121b and the second camera 121b and 121c are sequentially used, one of the first and second cameras 121c and 121c captures and stores an image while the other camera is used. Will switch back to the image capture mode and wait, thus reducing the burst interval per second and increasing the maximum number of shots.

6 is a flowchart provided to explain an operation control method of a portable terminal according to an embodiment of the present invention.

Referring to FIG. 6, when the continuous shooting mode is selected in the camera menu according to a user command or the like (S300), the controller 180 displays a preview image acquired through the first camera 121b on the display unit 151 ( S305).

 When shooting is selected by operation of a shooting button or the like while the 3D preview image is displayed (S310), the controller 180 generates an image using the first camera 121b (S315), and thereafter, the second standby state An image is generated using a camera (S320). This process is repeatedly performed until the end of the continuous shooting (S325).

That is, during continuous shooting, a plurality of images are generated and stored by using the first camera 121b and the second camera 121c sequentially.

If another function such as setting of the shooting environment or switching of the shooting mode is selected (S330), the controller 180 controls to perform an operation corresponding to the selected function (S335).

This process is repeatedly performed until the continuous shooting mode ends (S340). In addition, by such a process, it is possible to reduce the burst interval per second and increase the maximum number of shots during continuous shooting.

Meanwhile, a panorama image may be generated by combining a plurality of continuous shooting images into one continuous image. The panoramic image can be generated by the following process.

First, image calibration may be performed on images to be combined. Image Calibration As a preprocessing process before combining images, the images are naturally connected by correcting so that there is no difference in the connection area between the images to be combined to generate a panoramic image.

To this end, methods such as perspective distortion correction, vigenetting correction, and chromatic abreration correction may be used. In the case of perspective distortion correction, in particular, correction for convex distortion and pincushion distorsion is necessary. In the case of betting correction, the peripheral part of the image is darkened. In addition, the chromatic aberration correction corrects a phenomenon in which the focal point converges at different positions for each color because the refractive index is different according to the wavelength of light.

Next, image registration may be performed. Image registration is a process of matching images. In this process, one of the images to be used for combining becomes a reference, and the other becomes a target to find similarities between the two. Next, an image may be combined by searching for an optimal position using a motion vector or the like between the images to be combined.

When the images are combined, image blending may be performed. Image blending is the process of post processing so that the combined images are smoothly connected. In the image blending process, color correction minimizes the color difference between the combined images. Dynamic range extension allows the dynamic range to vary from image to image, allowing the dynamic range to be as close as possible.

When the blending process is completed, the panorama image is finally generated. The generated panoramic image may be stored in the memory 160 and used for various purposes.

FIG. 7 is a diagram referred to for describing a method of operating a mobile terminal according to an embodiment of the present disclosure.

At the time of continuous shooting, as shown in FIG. 7A, shooting is performed through the first camera 121b, and as shown in FIG. 7B, shooting is performed through the second camera 121c. This process may be repeated to generate multiple images.

In this case, there may be a difference between the area 400 photographed by the first camera 121b and the area 410 photographed by the second camera 121c. If a panorama image is generated by combining a plurality of continuous shooting images into one continuous image, a region overlapping between successive images is required, and thus the image captured by the first camera 121b and the second camera are used. A panorama or an image may be generated using the image photographed through 121c as it is.

However, the burst-photographed image may be generated only by an image belonging to a region where the region 400 captured by the first camera 121b and the region 410 photographed by the second camera 121c overlap.

Continuous shooting can be performed using the first and second cameras 121b and 121c as described above. In addition, it is also possible to take a video with any one of the first and second cameras 121b and 121c and to generate a 2D image with the other.

Meanwhile, the present invention can be implemented as a processor-readable code in a processor-readable recording medium provided in a portable terminal. The processor-readable recording medium includes all kinds of recording apparatuses in which data that can be read by the processor is stored. Examples of the processor-readable recording medium include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage device, and the like, and also include a carrier wave such as transmission through the Internet. In addition, the processor readable recording medium may be distributed over networked computer systems so that code readable by the processor in a distributed manner can be stored and executed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It should be understood that various modifications may be made by those skilled in the art without departing from the spirit and scope of the present invention.

110: wireless communication unit 120: A / V input unit
121: camera 130: user input unit
140: sensing unit 150: output unit
151: display unit 160: memory
170: interface unit 180: control unit

Claims (11)

Providing a first camera equipped with a first image sensor and a second camera equipped with a second image sensor; And
Generating a continuous shooting image by using the first and second cameras alternately during continuous shooting. The method of claim 1,
And generating a panoramic image by combining the plurality of continuous shooting images into one continuous image. The method of claim 1,
While one of the first and second image sensors captures an image, the other is in a standby state. The method of claim 1,
And displaying a preview image acquired through any one of the first and second cameras. The method of claim 1,
In the video recording mode, during the recording of the video through the first camera, the method of operating a mobile terminal further comprising the step of generating an image taken by the second camera. The method of claim 1,
And generating a 3D stereoscopic image by using parallaxes of the images respectively photographed by the first and second cameras in the 3D photographing mode. A display unit;
A first camera equipped with a first image sensor;
A second camera equipped with a second image sensor; And
And a controller configured to generate a burst photographed image by alternately using the first and the first cameras during continuous shooting. The method of claim 7, wherein
The controller may be configured to generate a panoramic image by combining the plurality of consecutively photographed images into one continuous image. The method of claim 7, wherein
The controller generates a 3D stereoscopic image by using parallaxes of the images respectively photographed by the first and second cameras in the 3D photographing mode. The method of claim 7, wherein
The controller may display a preview image acquired through any one of the first and second cameras on the display unit. The method of claim 7, wherein
And a memory configured to store data corresponding to the continuous shooting image.

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