KR102238532B1 - Mobile terminal and method for controlling the same - Google Patents

Abstract

The present invention relates to a mobile terminal and a control method for synthesizing a clear and clear picture using a plurality of pictures taken continuously. Specifically, the present invention, a camera; A sensing unit for detecting ambient brightness; A user input unit for receiving a photographing command; And a control unit configured to continuously take a first number of pictures as a photographing command is received, and output a shake removal picture based on a second number of pictures selected from among the first number of pictures taken. The number of 2 is determined based on the sensed ambient brightness.

Description

Mobile terminal and its control method {MOBILE TERMINAL AND METHOD FOR CONTROLLING THE SAME}

The present invention relates to a mobile terminal and a method of controlling the same, which enables the user's convenience to be further considered and the use of the terminal is realized.

Terminals can be divided into mobile/portable terminals and stationary terminals depending on whether they can be moved. Again, mobile terminals can be divided into handheld terminals and vehicle mounted terminals according to whether or not the user can directly carry them.

The functions of mobile terminals are diversifying. For example, there are functions of data and voice communication, taking pictures and videos through a camera, recording voices, playing music files through a speaker system, and outputting images or videos to the display unit. Some terminals add an electronic game play function or perform a multimedia player function. In particular, recent mobile terminals can receive multicast signals providing visual content such as broadcasting and video or television programs.

As functions are diversified, such a terminal is in the form of a multimedia player with complex functions such as, for example, taking photos or videos, playing music or video files, and receiving games and broadcasts. It is being implemented.

In order to support and increase the function of the terminal, it may be considered to improve the structural part and/or the software part of the terminal.

Recently, an OIS (Optical Image Stabilization) function has been studied to prevent a phenomenon in which the focus is shaken due to hand shake or the like when taking a picture using a mobile terminal. Briefly summarizing the principle of the OIS function, it is possible to remove or minimize the shake by rotating the camera direction in the opposite direction by detecting the movement of the mobile terminal such as (angular) acceleration. In order to supplement or replace the OIS function, a method of removing shake by reconstructing the photographed image(s) (hereinafter, referred to as an OIS function) is also required.

It is an object of the present invention to solve the above and other problems. Another object of the present invention is to provide a mobile terminal and a control method for preventing the focus from shaking when taking a picture.

According to an aspect of the present invention to achieve the above or other objects, a camera; A sensing unit for detecting ambient brightness; A user input unit for receiving a photographing command; And a control unit that continuously captures a first number of photos as the photographing command is received, and outputs a shake removal photo based on a second number of photo(s) selected from among the first number of photos taken. However, the second number is determined based on the sensed ambient brightness.

In addition, according to another aspect of the present invention, the step of sensing ambient brightness; Receiving a photographing command through a user input unit; Continuously photographing a first number of photos through a camera when the photographing command is received; And outputting a shake-removing picture based on a second number of picture(s) selected among the taken first number of pictures, wherein the second number is determined based on the sensed ambient brightness. .

The effects of the mobile terminal and the control method thereof according to the present invention will be described as follows.

According to at least one of the embodiments of the present invention, there is an advantage in that a sharp image can be obtained even in a poor shooting environment by preventing the focus from shaking when taking a picture.

Further scope of the applicability of the present invention will become apparent from the detailed description below. However, since various changes and modifications within the spirit and scope of the present invention can be clearly understood by those skilled in the art, specific embodiments such as the detailed description and preferred embodiments of the present invention should be understood as being given by way of example only.

1A is a block diagram illustrating a mobile terminal related to the present invention.
1B and 1C are conceptual diagrams of an example of a mobile terminal related to the present invention as viewed from different directions.
2 is a diagram illustrating a flow chart of a control method for synthesizing a shake-corrected photograph according to an exemplary embodiment of the present invention.
3 is a diagram illustrating a conceptual diagram of selecting some of pictures taken continuously and obtaining a shake correction picture using the selected pictures according to an embodiment of the present invention.
4 is a diagram illustrating six domains for detecting shaking according to an embodiment of the present invention.
5 is a diagram illustrating a conceptual diagram of a control method for performing photo synthesis based on a motion of the mobile terminal 100 detected during continuous shooting through a sensing unit.
6 is a conceptual diagram illustrating a position of a predetermined subject 501 by adjusting an image offset of the first and second photographed images 500-1 and 500-2.
7 is a diagram illustrating a control method for removing noise according to an embodiment of the present invention.
FIG. 8 is a diagram illustrating a control method of determining a subject with a large motion or a region with a large motion in continuous shooting pictures according to an embodiment of the present invention.
9 is a diagram illustrating a state diagram of an OIS function setting screen according to an embodiment of the present invention. 10 is a diagram illustrating a state diagram selected by a user from among a plurality of pictures taken continuously according to an embodiment of the present invention.
11 is a diagram illustrating a state diagram for applying an OIS control method to only the designated area after receiving an area designation from a user according to an embodiment of the present invention.
FIG. 12 is a diagram illustrating a photographing state diagram in which a level of an OIS control method for a predetermined area can be independently set according to an embodiment of the present invention.

Hereinafter, exemplary embodiments disclosed in the present specification will be described in detail with reference to the accompanying drawings, but identical or similar elements are denoted by the same reference numerals regardless of reference numerals, and redundant descriptions thereof will be omitted. The suffixes "module" and "unit" for constituent elements used in the following description are given or used interchangeably in consideration of only the ease of writing the specification, and do not themselves have a distinct meaning or role from each other. In addition, in describing the embodiments disclosed in the present specification, when it is determined that a detailed description of related known technologies may obscure the subject matter of the embodiments disclosed in the present specification, the detailed description thereof will be omitted. In addition, the accompanying drawings are for easy understanding of the embodiments disclosed in the present specification, and the technical idea disclosed in the present specification is not limited by the accompanying drawings, and all changes included in the spirit and scope of the present invention It should be understood to include equivalents or substitutes.

Terms including ordinal numbers such as first and second may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another component.

When a component is referred to as being "connected" or "connected" to another component, it is understood that it may be directly connected or connected to the other component, but other components may exist in the middle. It should be. On the other hand, when a component is referred to as being "directly connected" or "directly connected" to another component, it should be understood that there is no other component in the middle.

Singular expressions include plural expressions unless the context clearly indicates otherwise.

In this application, terms such as "comprises" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof does not preclude in advance.

Mobile terminals described herein include mobile phones, smart phones, laptop computers, digital broadcasting terminals, personal digital assistants (PDAs), portable multimedia players (PMPs), navigation systems, and slate PCs. , Tablet PC, ultrabook, wearable device, for example, smartwatch, smart glass, head mounted display (HMD), etc. have.

However, it will be readily apparent to those skilled in the art that the configuration according to the embodiment described in the present specification may also be applied to fixed terminals such as digital TVs, desktop computers, and digital signage, except when applicable only to mobile terminals. will be.

1A to 1C, FIG. 1A is a block diagram illustrating a mobile terminal related to the present invention, and FIGS. 1B and 1C are conceptual views of an example of a mobile terminal related to the present invention viewed from different directions.

The mobile terminal 100 includes a wireless communication unit 110, an input unit 120, a sensing unit 140, an output unit 150, an interface unit 160, a memory 170, a control unit 180, and a power supply unit 190. ) And the like. The components shown in FIG. 1A are not essential for implementing the mobile terminal, and thus, the mobile terminal described in the present specification may have more or fewer components than the components listed above.

More specifically, among the above components, the wireless communication unit 110 is provided between the mobile terminal 100 and the wireless communication system, between the mobile terminal 100 and another mobile terminal 100, or between the mobile terminal 100 and an external server. It may include one or more modules to enable wireless communication between. In addition, the wireless communication unit 110 may include one or more modules that connect the mobile terminal 100 to one or more networks.

The wireless communication unit 110 may include at least one of a broadcast reception module 111, a mobile communication module 112, a wireless Internet module 113, a short-range communication module 114, and a location information module 115. .

The input unit 120 includes a camera 121 or an image input unit for inputting an image signal, a microphone 122 for inputting an audio signal, or an audio input unit, and a user input unit 123 for receiving information from a user, for example, , A touch key, a mechanical key, etc.). The voice data or image data collected by the input unit 120 may be analyzed and processed as a user's control command.

The sensing unit 140 may include one or more sensors for sensing at least one of information in the mobile terminal, information on surrounding environments surrounding the mobile terminal, and user information. For example, the sensing unit 140 includes a proximity sensor 141, an illumination sensor 142, a touch sensor, an acceleration sensor, a magnetic sensor, and gravity. Sensor (G-sensor), gyroscope sensor (gyroscope sensor), motion sensor (motion sensor), RGB sensor, infrared sensor (IR sensor: infrared sensor), fingerprint sensor (finger scan sensor), ultrasonic sensor (ultrasonic sensor) , Optical sensor (for example, camera (see 121)), microphone (microphone, see 122), battery gauge, environmental sensor (for example, barometer, hygrometer, thermometer, radiation detection sensor, It may include at least one of a heat sensor, a gas sensor, etc.), and a chemical sensor (eg, an electronic nose, a healthcare sensor, a biometric sensor, etc.). Meanwhile, the mobile terminal disclosed in the present specification may combine and utilize information sensed by at least two or more of these sensors.

The output unit 150 is for generating an output related to visual, auditory or tactile sense, and includes at least one of a display unit 151, an audio output unit 152, a hap tip module 153, and a light output unit 154. can do. The display unit 151 may implement a touch screen by forming a layer structure or integrally with the touch sensor. Such a touch screen may function as a user input unit 123 that provides an input interface between the mobile terminal 100 and a user, and may provide an output interface between the mobile terminal 100 and a user.

The interface unit 160 serves as a passage between various types of external devices connected to the mobile terminal 100. The interface unit 160 connects a wired/wireless headset port, an external charger port, a wired/wireless data port, a memory card port, and a device equipped with an identification module. It may include at least one of a port, an audio input/output (I/O) port, an input/output (video I/O) port, and an earphone port. The mobile terminal 100 may perform appropriate control related to the connected external device in response to the connection of the external device to the interface unit 160.

In addition, the memory 170 stores data supporting various functions of the mobile terminal 100. The memory 170 may store a plurality of application programs (application programs or applications) driven by the mobile terminal 100, data for operation of the mobile terminal 100, and commands. At least some of these application programs may be downloaded from an external server through wireless communication. In addition, at least some of these application programs may exist on the mobile terminal 100 from the time of delivery for basic functions of the mobile terminal 100 (eg, incoming calls, outgoing functions, message reception, and outgoing functions). Meanwhile, the application program may be stored in the memory 170, installed on the mobile terminal 100, and driven by the controller 180 to perform an operation (or function) of the mobile terminal.

In addition to the operation related to the application program, the controller 180 generally controls the overall operation of the mobile terminal 100. The controller 180 may provide or process appropriate information or functions to a user by processing signals, data, information, etc. input or output through the above-described components or by driving an application program stored in the memory 170.

Also, in order to drive an application program stored in the memory 170, the controller 180 may control at least some of the components discussed with reference to FIG. 1A. Further, in order to drive the application program, the controller 180 may operate by combining at least two or more of the components included in the mobile terminal 100 with each other.

The power supply unit 190 receives external power and internal power under the control of the controller 180 and supplies power to each of the components included in the mobile terminal 100. The power supply unit 190 includes a battery, and the battery may be a built-in battery or a replaceable battery.

At least some of the components may operate in cooperation with each other to implement an operation, control, or control method of a mobile terminal according to various embodiments described below. In addition, the operation, control, or control method of the mobile terminal may be implemented on the mobile terminal by driving at least one application program stored in the memory 170.

Hereinafter, prior to examining various embodiments implemented through the mobile terminal 100 described above, the above-listed components will be described in more detail with reference to FIG. 1A.

First, referring to the wireless communication unit 110, the broadcast receiving module 111 of the wireless communication unit 110 receives a broadcast signal and/or broadcast-related information from an external broadcast management server through a broadcast channel. The broadcast channel may include a satellite channel and a terrestrial channel. Two or more of the broadcast reception modules may be provided to the mobile terminal 100 for simultaneous broadcast reception or broadcast channel switching of at least two broadcast channels.

The mobile communication module 112 includes technical standards or communication methods for mobile communication (for example, GSM (Global System for Mobile communication), CDMA (Code Division Multi Access), CDMA2000 (Code Division Multi Access 2000)), EV -DO (Enhanced Voice-Data Optimized or Enhanced Voice-Data Only), WCDMA (Wideband CDMA), HSDPA (High Speed Downlink Packet Access), HSUPA (High Speed Uplink Packet Access), LTE (Long Term Evolution), LTE-A (Long Term Evolution-Advanced), etc.), transmits and receives radio signals with at least one of a base station, an external terminal, and a server.

The wireless signal may include a voice call signal, a video call signal, or various types of data according to transmission and reception of text/multimedia messages.

The wireless Internet module 113 refers to a module for wireless Internet access, and may be built-in or external to the mobile terminal 100. The wireless Internet module 113 is configured to transmit and receive wireless signals in a communication network according to wireless Internet technologies.

Examples of wireless Internet technologies include WLAN (Wireless LAN), Wi-Fi (Wireless-Fidelity), Wi-Fi (Wireless Fidelity) Direct, DLNA (Digital Living Network Alliance), WiBro (Wireless Broadband), WiMAX (World Interoperability for Microwave Access), High Speed Downlink Packet Access (HSDPA), High Speed Uplink Packet Access (HSUPA), Long Term Evolution (LTE), Long Term Evolution-Advanced (LTE-A), and the like, and the wireless Internet module ( 113) transmits and receives data according to at least one wireless Internet technology in a range including Internet technologies not listed above.

From the point of view that wireless Internet access by WiBro, HSDPA, HSUPA, GSM, CDMA, WCDMA, LTE, LTE-A, etc. is made through a mobile communication network, the wireless Internet module 113 performs wireless Internet access through the mobile communication network. ) May be understood as a kind of the mobile communication module 112.

The short range communication module 114 is for short range communication, and includes Bluetooth™, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee, and NFC. Near field communication may be supported using at least one of (Near Field Communication), Wi-Fi (Wireless-Fidelity), Wi-Fi Direct, and Wireless USB (Wireless Universal Serial Bus) technologies. The short-distance communication module 114 is, between the mobile terminal 100 and a wireless communication system, between the mobile terminal 100 and another mobile terminal 100, or a mobile terminal 100 through a wireless area network (Wireless Area Networks). ) And a network in which another mobile terminal 100 or an external server is located may support wireless communication. The local area wireless communication network may be a wireless personal area network (Wireless Personal Area Networks).

Here, the other mobile terminal 100 is a wearable device (for example, a smartwatch, smart glasses) capable of exchanging data with the mobile terminal 100 according to the present invention (or interlocking). (smart glass), HMD (head mounted display)). The short-range communication module 114 may detect (or recognize) a wearable device capable of communicating with the mobile terminal 100 around the mobile terminal 100. Furthermore, when the sensed wearable device is a device that is authenticated to communicate with the mobile terminal 100 according to the present invention, the controller 180 transmits at least part of the data processed by the mobile terminal 100 to the short-range communication module ( 114) can be transmitted to the wearable device. Accordingly, a user of the wearable device can use data processed by the mobile terminal 100 through the wearable device. For example, according to this, when a call is received by the mobile terminal 100, the user performs a phone call through the wearable device, or when a message is received by the mobile terminal 100, the user receives the received call through the wearable device. It is possible to check the message.

The location information module 115 is a module for obtaining a location (or current location) of a mobile terminal, and representative examples thereof include a GPS (Global Positioning System) module or a WiFi (Wireless Fidelity) module. For example, if the mobile terminal utilizes a GPS module, it can acquire the location of the mobile terminal by using a signal transmitted from a GPS satellite. As another example, when the mobile terminal utilizes the Wi-Fi module, the mobile terminal may acquire the location of the mobile terminal based on information of the Wi-Fi module and a wireless access point (AP) that transmits or receives a wireless signal. If necessary, the location information module 115 may perform any function among other modules of the wireless communication unit 110 in order to obtain data on the location of the mobile terminal as a substitute or additionally. The location information module 115 is a module used to obtain the location (or current location) of the mobile terminal, and is not limited to a module that directly calculates or obtains the location of the mobile terminal.

Next, the input unit 120 is for inputting image information (or signal), audio information (or signal), data, or information input from a user. Alternatively, a plurality of cameras 121 may be provided. The camera 121 processes an image frame such as a still image or a moving image obtained by an image sensor in a video call mode or a photographing mode. The processed image frame may be displayed on the display unit 151 or stored in the memory 170. Meanwhile, a plurality of cameras 121 provided in the mobile terminal 100 may be arranged to form a matrix structure, and through the camera 121 forming a matrix structure as described above, various angles or focuses may be applied to the mobile terminal 100. A plurality of image information may be input. In addition, the plurality of cameras 121 may be arranged in a stereo structure to obtain a left image and a right image for implementing a stereoscopic image.

The microphone 122 processes an external sound signal into electrical voice data. The processed voice data may be utilized in various ways according to a function (or an application program being executed) being executed by the mobile terminal 100. Meanwhile, the microphone 122 may be implemented with various noise removal algorithms for removing noise generated in the process of receiving an external sound signal.

The user input unit 123 is for receiving information from a user, and when information is input through the user input unit 123, the controller 180 can control the operation of the mobile terminal 100 to correspond to the input information. . Such, the user input unit 123 is a mechanical (mechanical) input means (or a mechanical key, for example, a button located on the front, rear or side of the mobile terminal 100, a dome switch (dome switch), a jog wheel, Jog switch, etc.) and a touch-type input means. As an example, the touch input means is composed of a virtual key, a soft key, or a visual key displayed on a touch screen through software processing, or a portion other than the touch screen It may be made of a touch key (touch key) arranged in the. On the other hand, the virtual key or the visual key can be displayed on the touch screen while having various forms, for example, graphic, text, icon, video, or these It can be made of a combination of.

Meanwhile, the sensing unit 140 senses at least one of information in the mobile terminal, information on a surrounding environment surrounding the mobile terminal, and user information, and generates a sensing signal corresponding thereto. The controller 180 may control driving or operation of the mobile terminal 100 or perform data processing, functions, or operations related to an application program installed in the mobile terminal 100 based on such a sensing signal. Representative sensors among various sensors that may be included in the sensing unit 140 will be described in more detail.

First, the proximity sensor 141 refers to a sensor that detects the presence or absence of an object approaching a predetermined detection surface or an object existing in the vicinity using the force of an electromagnetic field or infrared rays without mechanical contact. In the proximity sensor 141, the proximity sensor 141 may be disposed in an inner area of the mobile terminal surrounded by the touch screen described above or near the touch screen.

Examples of the proximity sensor 141 include a transmission type photoelectric sensor, a direct reflection type photoelectric sensor, a mirror reflection type photoelectric sensor, a high frequency oscillation type proximity sensor, a capacitive type proximity sensor, a magnetic type proximity sensor, an infrared proximity sensor, and the like. When the touch screen is a capacitive type, the proximity sensor 141 may be configured to detect the proximity of the object by a change in the electric field according to the proximity of the conductive object. In this case, the touch screen (or touch sensor) itself may be classified as a proximity sensor.

On the other hand, for convenience of explanation, the action of allowing an object to be located on the touch screen without being in contact with the object to be recognized as being positioned on the touch screen is named "proximity touch", and the touch The act of actually touching an object on the screen is called "contact touch". A position at which an object is touched in proximity on the touch screen means a position at which the object is vertically corresponding to the touch screen when the object is touched in proximity. The proximity sensor 141 may detect a proximity touch and a proximity touch pattern (eg, a proximity touch distance, a proximity touch direction, a proximity touch speed, a proximity touch time, a proximity touch position, a proximity touch movement state, etc.). have. Meanwhile, as above, the controller 180 processes data (or information) corresponding to the proximity touch operation and the proximity touch pattern sensed through the proximity sensor 141, and further, provides visual information corresponding to the processed data. It can be output on the touch screen. Furthermore, the controller 180 may control the mobile terminal 100 to process different operations or data (or information) according to whether a touch to the same point on the touch screen is a proximity touch or a touch touch. .

The touch sensor applies a touch (or touch input) to the touch screen (or display unit 151) using at least one of various touch methods such as a resistive film method, a capacitive method, an infrared method, an ultrasonic method, and a magnetic field method. To detect.

As an example, the touch sensor may be configured to convert a pressure applied to a specific portion of the touch screen or a change in capacitance generated at a specific portion into an electrical input signal. The touch sensor may be configured to detect a location, an area, a pressure when a touch, a capacitance when a touch is touched, and the like at which a touch object applied to the touch screen is touched on the touch sensor. Here, the touch object is an object that applies a touch to the touch sensor, and may be, for example, a finger, a touch pen, a stylus pen, or a pointer.

In this way, when there is a touch input to the touch sensor, the signal(s) corresponding thereto is transmitted to the touch controller. The touch controller processes the signal(s) and then transmits the corresponding data to the controller 180. Accordingly, the controller 180 can know which area of the display unit 151 has been touched. Here, the touch controller may be a separate component from the controller 180 or may be the controller 180 itself.

Meanwhile, the controller 180 may perform different controls or perform the same control according to the type of the touch object by touching the touch screen (or a touch key provided in addition to the touch screen). Whether to perform different controls or the same control according to the type of the touch object may be determined according to an operating state of the mobile terminal 100 or an application program being executed.

Meanwhile, the touch sensor and the proximity sensor described above are independently or in combination, and a short (or tap) touch, a long touch, a multi touch, and a drag touch on the touch screen. ), flick touch, pinch-in touch, pinch-out touch, swipe touch, hovering touch, etc. You can sense the touch.

The ultrasonic sensor may recognize location information of a sensing target by using ultrasonic waves. Meanwhile, the controller 180 may calculate the location of the wave generator through information sensed from the optical sensor and the plurality of ultrasonic sensors. The location of the wave generator may be calculated by using a property that the light is much faster than that of the ultrasonic wave, that is, the time that the light reaches the optical sensor is much faster than the time that the ultrasonic wave reaches the ultrasonic sensor. More specifically, the position of the wave generator may be calculated using a time difference between a time when the ultrasonic wave arrives using light as a reference signal.

On the other hand, the camera 121, as viewed as the configuration of the input unit 120, includes at least one of a camera sensor (eg, CCD, CMOS, etc.), a photo sensor (or image sensor), and a laser sensor.

The camera 121 and the laser sensor are combined with each other to detect a touch of a sensing target for a 3D stereoscopic image. The photosensor may be stacked on the display device, and the photosensor is configured to scan the motion of a sensing object close to the touch screen. More specifically, the photo sensor scans the contents placed on the photo sensor by mounting a photo diode and a transistor (TR) in a row/column and using an electrical signal that changes according to the amount of light applied to the photo diode. That is, the photosensor may calculate the coordinates of the sensing object according to the amount of light change, and through this, the location information of the sensing object may be obtained.

The display unit 151 displays (outputs) information processed by the mobile terminal 100. For example, the display unit 151 may display execution screen information of an application program driven in the mobile terminal 100, or UI (User Interface) and GUI (Graphic User Interface) information according to such execution screen information. .

In addition, the display unit 151 may be configured as a three-dimensional display unit that displays a three-dimensional image.

A three-dimensional display method such as a stereoscopic method (glasses method), an auto stereoscopic method (no glasses method), and a projection method (holographic method) may be applied to the stereoscopic display unit.

The sound output unit 152 may output audio data received from the wireless communication unit 110 or stored in the memory 170 in a call signal reception, a call mode or a recording mode, a voice recognition mode, a broadcast reception mode, and the like. The sound output unit 152 also outputs sound signals related to functions (eg, a call signal reception sound, a message reception sound, etc.) performed by the mobile terminal 100. The sound output unit 152 may include a receiver, a speaker, a buzzer, and the like.

The haptic module 153 generates various tactile effects that a user can feel. A typical example of the tactile effect generated by the haptic module 153 may be vibration. The intensity and pattern of the vibration generated by the haptic module 153 may be controlled by a user's selection or setting by a controller. For example, the haptic module 153 may synthesize and output different vibrations or sequentially output them.

In addition to vibration, the haptic module 153 is designed to respond to stimuli such as an arrangement of pins vertically moving with respect to the contact skin surface, blowing force or suction force of air through the injection or inlet, grazing against the skin surface, contact of electrodes, and electrostatic force. It can generate various tactile effects, such as an effect by the effect and an effect by reproducing the feeling of cooling and warming using an endothermic or exothermic element.

The haptic module 153 may not only deliver a tactile effect through direct contact, but may also be implemented so that a user can feel the tactile effect through muscle sensations such as a finger or an arm. Two or more haptic modules 153 may be provided depending on the configuration aspect of the mobile terminal 100.

The light output unit 154 outputs a signal for notifying the occurrence of an event using light from a light source of the mobile terminal 100. Examples of events occurring in the mobile terminal 100 may include message reception, call signal reception, missed call, alarm, schedule notification, e-mail reception, and information reception through an application.

The signal output from the light output unit 154 is implemented as the mobile terminal emits a single color or a plurality of colors of light to the front or rear. The signal output may be terminated when the mobile terminal detects the user's event confirmation.

The interface unit 160 serves as a passage for all external devices connected to the mobile terminal 100. The interface unit 160 receives data from an external device or receives power and transmits it to each component inside the mobile terminal 100, or transmits data inside the mobile terminal 100 to an external device. For example, a wired/wireless headset port, an external charger port, a wired/wireless data port, a memory card port, a port for connecting a device equipped with an identification module. (port), an audio input/output (I/O) port, a video input/output (I/O) port, an earphone port, and the like may be included in the interface unit 160.

Meanwhile, the identification module is a chip that stores various types of information for authenticating the right to use the mobile terminal 100, and includes a user identification module (UIM), a subscriber identity module (SIM), and universal user authentication. A module (universal subscriber identity module; USIM) may be included. A device equipped with an identification module (hereinafter referred to as'identification device') may be manufactured in the form of a smart card. Accordingly, the identification device may be connected to the terminal 100 through the interface unit 160.

In addition, the interface unit 160 serves as a path through which power from the cradle is supplied to the mobile terminal 100 when the mobile terminal 100 is connected to an external cradle, or is input from the cradle by a user. It may be a path through which various command signals are transmitted to the mobile terminal 100. Various command signals or power input from the cradle may be operated as signals for recognizing that the mobile terminal 100 is correctly mounted on the cradle.

The memory 170 may store a program for the operation of the controller 180 and may temporarily store input/output data (eg, a phone book, a message, a still image, a video, etc.). The memory 170 may store data related to vibrations and sounds of various patterns output when a touch input on the touch screen is performed.

The memory 170 is a flash memory type, a hard disk type, a solid state disk type, an SDD type, a multimedia card micro type. ), card-type memory (e.g., SD or XD memory), random access memory (RAM), static random access memory (SRAM), read-only memory (ROM), electrically erasable programmable read (EEPROM) -only memory), programmable read-only memory (PROM), magnetic memory, magnetic disk, and optical disk. The mobile terminal 100 may be operated in connection with a web storage that performs a storage function of the memory 170 over the Internet.

Meanwhile, as described above, the controller 180 controls an operation related to an application program and, in general, an overall operation of the mobile terminal 100. For example, when the state of the mobile terminal satisfies a set condition, the controller 180 may execute or release a lock state limiting input of a user's control command to applications.

In addition, the controller 180 performs control and processing related to voice calls, data communication, and video calls, or performs pattern recognition processing capable of recognizing handwriting input or drawing input performed on the touch screen as characters and images, respectively. I can. Furthermore, in order to implement various embodiments described below on the mobile terminal 100 according to the present invention, the controller 180 may control one or more of the above-described components in combination.

The power supply unit 190 receives external power and internal power under the control of the controller 180 and supplies power necessary for the operation of each component. The power supply unit 190 includes a battery, and the battery may be a built-in battery configured to be rechargeable, and may be detachably coupled to a terminal body for charging or the like.

In addition, the power supply unit 190 may have a connection port, and the connection port may be configured as an example of an interface 160 to which an external charger supplying power for charging a battery is electrically connected.

As another example, the power supply unit 190 may be configured to charge the battery in a wireless manner without using the connection port. In this case, the power supply unit 190 uses one or more of an inductive coupling method based on a magnetic induction phenomenon or a magnetic resonance coupling method based on an electromagnetic resonance phenomenon from an external wireless power transmitter. Power can be delivered.

Meanwhile, hereinafter, various embodiments may be implemented in a recording medium that can be read by a computer or a similar device using, for example, software, hardware, or a combination thereof.

1B and 1C, the disclosed mobile terminal 100 includes a bar-shaped terminal body. However, the present invention is not limited thereto, and can be applied to various structures such as a watch type, a clip type, a glass type, or a folder type in which two or more bodies are relatively movably coupled, a flip type, a slide type, a swing type, and a swivel type. . Although it will relate to a specific type of mobile terminal, the description of a specific type of mobile terminal can be applied generally to other types of mobile terminals.

Here, the terminal body may be understood as a concept referring to the mobile terminal 100 as at least one aggregate.

The mobile terminal 100 includes a case (eg, a frame, a housing, a cover, etc.) forming an exterior. As shown, the mobile terminal 100 may include a front case 101 and a rear case 102. Various electronic components are disposed in an inner space formed by the combination of the front case 101 and the rear case 102. At least one middle case may be additionally disposed between the front case 101 and the rear case 102.

A display unit 151 is disposed on the front of the terminal body to output information. As illustrated, the window 151a of the display unit 151 may be mounted on the front case 101 to form the front surface of the terminal body together with the front case 101.

In some cases, electronic components may be mounted on the rear case 102 as well. Electronic components that can be mounted on the rear case 102 include a detachable battery, an identification module, and a memory card. In this case, a rear cover 103 for covering the mounted electronic component may be detachably coupled to the rear case 102. Accordingly, when the rear cover 103 is separated from the rear case 102, the electronic components mounted on the rear case 102 are exposed to the outside.

As shown, when the rear cover 103 is coupled to the rear case 102, a part of the side of the rear case 102 may be exposed. In some cases, when the rear case 102 is combined, the rear case 102 may be completely covered by the rear cover 103. Meanwhile, the rear cover 103 may be provided with an opening for exposing the camera 121b or the sound output unit 152b to the outside.

These cases 101, 102, 103 may be formed by injection of synthetic resin or may be formed of a metal such as stainless steel (STS), aluminum (Al), titanium (Ti), or the like.

Unlike the above example in which a plurality of cases provide an inner space for accommodating various electronic components, the mobile terminal 100 may be configured such that one case provides the inner space. In this case, a unibody mobile terminal 100 in which synthetic resin or metal is connected from the side to the rear may be implemented.

Meanwhile, the mobile terminal 100 may include a waterproof unit (not shown) that prevents water from permeating into the terminal body. For example, the waterproof unit is provided between the window 151a and the front case 101, between the front case 101 and the rear case 102, or between the rear case 102 and the rear cover 103, and the combination thereof It may include a waterproof member that seals the inner space of the city.

The mobile terminal 100 includes a display unit 151, first and second sound output units 152a and 152b, a proximity sensor 141, an illuminance sensor 142, a light output unit 154, and first and second sound output units. Cameras 121a and 121b, first and second operation units 123a and 123b, microphone 122, interface unit 160, and the like may be provided.

Hereinafter, as shown in FIGS. 1B and 1C, a display unit 151, a first sound output unit 152a, a proximity sensor 141, an illuminance sensor 142, and a light output unit ( 154), a first camera 121a and a first operation unit 123a are disposed, a second operation unit 123b, a microphone 122 and an interface unit 160 are disposed on the side of the terminal body, and the terminal body The mobile terminal 100 in which the second sound output unit 152b and the second camera 121b are disposed on the rear surface of will be described as an example.

However, these configurations are not limited to this arrangement. These configurations may be excluded or replaced as necessary, or may be disposed on different sides. For example, the first manipulation unit 123a may not be provided on the front surface of the terminal body, and the second sound output unit 152b may be provided on the side of the terminal body rather than on the rear surface of the terminal body.

The display unit 151 displays (outputs) information processed by the mobile terminal 100. For example, the display unit 151 may display execution screen information of an application program driven in the mobile terminal 100, or UI (User Interface) and GUI (Graphic User Interface) information according to such execution screen information. .

The display unit 151 includes a liquid crystal display (LCD), a thin film transistor-liquid crystal display (TFT LCD), an organic light-emitting diode (OLED), and a flexible display. display), a 3D display, and an e-ink display.

In addition, two or more display units 151 may exist depending on the implementation form of the mobile terminal 100. In this case, in the mobile terminal 100, a plurality of display units may be spaced apart or integrally disposed on one surface, or may be disposed on different surfaces, respectively.

The display unit 151 may include a touch sensor that senses a touch on the display unit 151 so as to receive a control command by a touch method. By using this, when a touch is made to the display unit 151, the touch sensor detects the touch, and the controller 180 may be configured to generate a control command corresponding to the touch based on this. The content input by the touch method may be letters or numbers, or menu items that can be indicated or designated in various modes.

Meanwhile, the touch sensor is formed in a film form having a touch pattern and is disposed between the window 151a and a display (not shown) on the rear surface of the window 151a, or is a metal wire patterned directly on the rear surface of the window 151a. May be. Alternatively, the touch sensor may be integrally formed with the display. For example, the touch sensor may be disposed on a substrate of the display or may be provided inside the display.

As such, the display unit 151 may form a touch screen together with a touch sensor, and in this case, the touch screen may function as a user input unit 123 (see FIG. 1A). In some cases, the touch screen may replace at least some functions of the first manipulation unit 123a.

The first sound output unit 152a may be implemented as a receiver that transmits a call sound to the user's ear, and the second sound output unit 152b is a loud speaker that outputs various alarm sounds or multimedia playback sounds. ) Can be implemented.

A sound hole for emitting sound generated from the first sound output unit 152a may be formed in the window 151a of the display unit 151. However, the present invention is not limited thereto, and the sound may be configured to be emitted along an assembly gap between structures (eg, a gap between the window 151a and the front case 101). In this case, the externally formed hole for sound output is not visible or hidden, so that the appearance of the mobile terminal 100 may be more simple.

The light output unit 154 is configured to output light for notifying when an event occurs. Examples of the event include message reception, call signal reception, missed call, alarm, schedule notification, e-mail reception, and information reception through an application. When the user's event confirmation is detected, the controller 180 may control the light output unit 154 to terminate the output of light.

The first camera 121a processes an image frame of a still image or a moving picture obtained by an image sensor in a photographing mode or a video call mode. The processed image frame may be displayed on the display unit 151 and may be stored in the memory 170.

The first and second manipulation units 123a and 123b are an example of a user input unit 123 that is operated to receive a command for controlling the operation of the mobile terminal 100, and may also be collectively referred to as a manipulating portion. have. The first and second manipulation units 123a and 123b may be employed in any manner as long as the user operates while receiving a tactile feeling, such as touch, push, and scroll. In addition, the first and second manipulation units 123a and 123b may also be employed in a manner in which the first and second manipulation units 123a and 123b are manipulated without a user's tactile feeling through proximity touch, hovering touch, or the like.

In this drawing, the first manipulation unit 123a is illustrated as a touch key, but the present invention is not limited thereto. For example, the first manipulation unit 123a may be a push key (mechanical key) or may be configured as a combination of a touch key and a push key.

Contents input by the first and second manipulation units 123a and 123b may be set in various ways. For example, the first operation unit 123a receives commands such as menu, home key, cancel, search, etc., and the second operation unit 123b is output from the first or second sound output units 152a, 152b. Commands such as adjusting the volume of sound and switching to the touch recognition mode of the display unit 151 may be input.

Meanwhile, as another example of the user input unit 123, a rear input unit (not shown) may be provided on the rear surface of the terminal body. This rear input unit is manipulated to receive a command for controlling the operation of the mobile terminal 100, and input contents may be variously set. For example, commands such as power on/off, start, end, scroll, etc., control the volume of sound output from the first and second sound output units 152a and 152b, and touch recognition mode of the display unit 151 You can receive commands such as conversion of. The rear input unit may be implemented in a form capable of inputting by a touch input, a push input, or a combination thereof.

The rear input unit may be disposed to overlap the front display unit 151 in the thickness direction of the terminal body. For example, when the user holds the terminal body with one hand, the rear input unit may be disposed on the rear upper end of the terminal body so that the user can easily manipulate the terminal body using the index finger. However, the present invention is not necessarily limited thereto, and the position of the rear input unit may be changed.

When the rear input unit is provided on the rear side of the terminal body, a new type of user interface can be implemented using the rear input unit. In addition, when the touch screen or the rear input unit described above replaces at least some functions of the first manipulation unit 123a provided on the front of the terminal body, and the first manipulation unit 123a is not disposed on the front of the terminal body The display unit 151 may be configured as a larger screen.

Meanwhile, the mobile terminal 100 may be provided with a fingerprint recognition sensor for recognizing a user's fingerprint, and the controller 180 may use the fingerprint information sensed through the fingerprint recognition sensor as an authentication means. The fingerprint recognition sensor may be embedded in the display unit 151 or the user input unit 123.

The microphone 122 is configured to receive a user's voice and other sounds. The microphone 122 may be provided at a plurality of locations and configured to receive stereo sound.

The interface unit 160 becomes a passage through which the mobile terminal 100 can be connected to an external device. For example, the interface unit 160 is a connection terminal for connection with another device (eg, earphone, external speaker), a port for short-range communication (eg, an infrared port (IrDA Port), a Bluetooth port (Bluetooth)). Port), a wireless LAN port, etc.], or at least one of a power supply terminal for supplying power to the mobile terminal 100. The interface unit 160 may be implemented in the form of a socket for accommodating an external card such as a Subscriber Identification Module (SIM) or a User Identity Module (UIM), or a memory card for storing information.

A second camera 121b may be disposed on the rear surface of the terminal body. In this case, the second camera 121b has a photographing direction substantially opposite to the first camera 121a.

The second camera 121b may include a plurality of lenses arranged along at least one line. The plurality of lenses may be arranged in a matrix format. Such a camera may be referred to as an'array camera'. When the second camera 121b is configured as an array camera, an image may be photographed in various ways using a plurality of lenses, and an image of better quality may be obtained.

The flash 124 may be disposed adjacent to the second camera 121b. The flash 124 illuminates light toward the subject when photographing the subject with the second camera 121b.

A second sound output unit 152b may be additionally disposed on the terminal body. The second sound output unit 152b may implement a stereo function together with the first sound output unit 152a, and may be used to implement a speakerphone mode during a call.

At least one antenna for wireless communication may be provided in the terminal body. The antenna may be embedded in the terminal body or may be formed in a case. For example, an antenna forming a part of the broadcast receiving module 111 (refer to FIG. 1A) may be configured to be retractable from the terminal body. Alternatively, the antenna may be formed in a film type and attached to the inner surface of the rear cover 103, or a case including a conductive material may be configured to function as an antenna.

The terminal body is provided with a power supply unit 190 (refer to FIG. 1A) for supplying power to the mobile terminal 100. The power supply unit 190 may include a battery 191 that is built into the terminal body or configured to be detachable from the outside of the terminal body.

The battery 191 may be configured to receive power through a power cable connected to the interface unit 160. In addition, the battery 191 may be configured to enable wireless charging through a wireless charger. The wireless charging may be implemented by a magnetic induction method or a resonance method (magnetic resonance method).

On the other hand, in this drawing, the rear cover 103 is coupled to the rear case 102 to cover the battery 191 to limit the separation of the battery 191 and protect the battery 191 from external shocks and foreign substances. It is exemplifying. When the battery 191 is configured to be detachably attached to the terminal body, the rear cover 103 may be detachably coupled to the rear case 102.

An accessory that protects the exterior of the mobile terminal 100 or assists or expands the function of the mobile terminal 100 may be added. An example of such an accessory may be a cover or a pouch that covers or accommodates at least one surface of the mobile terminal 100. The cover or pouch may be configured to interlock with the display unit 151 to expand functions of the mobile terminal 100. Another example of an accessory may be a touch pen for assisting or extending a touch input to a touch screen.

Hereinafter, embodiments related to a control method that can be implemented in a mobile terminal configured as described above will be described with reference to the accompanying drawings. It is apparent to those skilled in the art that the present invention can be embodied in other specific forms without departing from the spirit and essential features of the present invention.

In one embodiment of the present invention, a control method(s) for solving a problem of shaking the focus of a subject that may occur due to shaking of a hand or the like when taking a picture is proposed. In the control method(s) described below, any one method may be used independently, but two or more methods may be used in combination. Specifically, in an embodiment of the present invention, it is proposed to automatically perform burst shot when receiving a photographing command. The mobile terminal 100 may provide a user with a shake-corrected photo by synthesizing a plurality of images obtained by continuous shooting. Hereinafter, embodiments of the present invention will be described in more detail together with the drawings.

2 is a diagram illustrating a flow chart of a control method for synthesizing a shake-corrected photo according to an exemplary embodiment of the present invention.

In step S201, the controller 180 activates the camera 121. Then, in step S202, the controller 180 may detect the ambient brightness through the sensing unit 140. When a photographing command is received from the user (step S203), the controller 180 may continuously photograph the first number of photos (burst shot) (step S204). The reason why continuous shooting is performed as described above is to obtain a picture in which shaking is corrected by composing a plurality of pictures obtained by continuous shooting.

In step S205, the controller 180 selects a second number of image data from among the first number of photos obtained by continuous shooting in step S204. In this case, the second number will be less than or equal to the first number.

3 is a diagram illustrating a conceptual diagram of selecting some of pictures taken continuously and obtaining a shake correction picture using the selected pictures according to an embodiment of the present invention.

Referring to FIG. 3 (a), a first number of photos was acquired by continuous shooting. Among the first number of photos, the second number of photos is selected by the controller 180 (see FIG. 3(b)).

Regarding the above selection method, in one embodiment of the present invention, it is proposed to select based on the sharpness of the photographed picture.

As a first example, the controller 180 may select a picture having excellent clarity from among the first number of pictures taken continuously. If it is assumed that the sharpness can be quantified for each photo, only the second number of photos with sharpness equal to or greater than a predetermined value may be selected. The embodiments of the present invention are not limited to the method of analyzing the sharpness of a picture itself, and any conventional control method for analyzing the sharpness can be applied to the embodiments of the present invention.

As a second example of selecting a picture based on sharpness, in an embodiment of the present invention, the ambient brightness detected in step S202 may be further used. The controller 180 may determine a second number using the detected ambient brightness, and when the second number is determined, select a second number of photos with high sharpness among the first number of photos. For example, if the second number is determined to be "three" based on the ambient brightness, the controller 180 may select three images with high sharpness from among ten photographed photos.

As shown in FIG. 3, by synthesizing the selected second number of photos, the controller 180 may output at least one shake correction photo 301 (step S206 in FIG. 2 ). In this case, the controller 180 may provide the user with a plurality of shake correction photos 301 and allow the user to select a desired image from among the plurality of shake correction photos 301. In obtaining the shake removal photos based on the second number of photos, a shake removal method (algorithm) divided into a plurality of application levels (hereinafter referred to as levels) may be applied.

In one embodiment of the present invention, it is proposed not only to determine the second number based on ambient brightness, but also to control the level of a method for removing shake or a method for removing noise based on the ambient brightness. That is, in this embodiment, it is assumed that a method for removing shake or a method for removing noise can set a level and remove shake or noise according to the set level. The higher the level, the higher the performance can be removed, but the number of operations required for removal may increase. Conversely, if the level is lowered, it can be removed with low performance, but relatively fewer operations are required. In one embodiment of the present invention, it is proposed to select an appropriate level based on the ambient brightness, and to remove the shaking and noise by using a minimum operation. Hereinafter, in an embodiment of the present invention, it is assumed that the level is divided into 1 to 6 levels, and 1 level is the highest level, and as the number increases, the level decreases.

That is, in step S206-1, in synthesizing the shake removal photos using the second number of photos, the controller 180 determines the noise removal level as the first level based on the ambient brightness detected in step S202, Noise can be removed at the determined first level. The more the number of continuous shooting pictures used for noise removal is, the better the noise removal performance may be.

Similarly, in step S206-2, in synthesizing the shake removal photos using the second number of photos, the controller 180 determines the shake removal level as the second level based on the ambient brightness detected in step S202, Shaking can be eliminated with the determined second level. In addition, as the number of continuous shooting pictures used to remove shake increases, the performance of removing shake may be improved.

Table 1 below is a table that summarizes specific examples of a method of determining the number of selections based on ambient brightness and a method of determining a shake and noise removal level.

Detected
Ambient brightness EV(exposure value) Gain Number of burst shots
(First number) Number of choices
(Second number) Noise reduction level Shake removal level 0~7lux
(Very dark interior) 36 ~ 58 times 5 5
(Use all without selection) Level 2 Level 2 8~30lux
(Dark interior) 12 to 35 times 5 5
(Use all without selection) Level 2 Level 6 31~150lux
(Slightly dark interior) 5 to 11 times 5 2
(2 photos with high definition are selected) Level 1 Level 6 150 lux ~
(Bright place) 0 to 4 times 5 One
(Only one picture with the highest sharpness is selected) (No noise removal required in bright places) (No shake removal required in bright places)

The EV gain (Exposure Value gain) refers to a gain that amplifies the intensity of light sensed through an imaging device.

In a very dark room in Table 1, since it is an extremely low-light environment, a large amount of EV gain is required, and noise due to this EV gain may be a problem. Accordingly, in such an environment, noise removal can be performed mainly (the noise removal level is increased).

In addition, since the second brightness is not difficult to recognize objects in a dark indoor environment (8~30 lux section), noise removal and shake removal should be considered together.

Third, in a slightly dark indoor environment (31~150 lux section), the weight of noise may not be that large, so the controller 180 can select and use only two pictures with high sharpness from the first number of pictures taken. have. In addition, the controller 180 may output a shake-removing picture through synthesis using two selected pictures.

Lastly, in the case of a bright place environment (150 lux or more), there is almost no noise or blur, so a picture with the highest sharpness among the first number of pictures taken continuously is selected and the noise/shake removal function is omitted and provided to the user. I can.

Furthermore, in an embodiment of the present invention, the continuous shooting speed may be controlled during continuous shooting based on the detected ambient brightness. That is, if the surrounding brightness is bright, continuous shooting is performed faster to minimize the time difference between the photographed pictures.

On the other hand, in one embodiment of the present invention, it is proposed to further detect the movement (shake) of the mobile terminal when each photo is taken in continuous shooting, and to reflect the detected shake in consideration of the photo synthesis. This embodiment will be described with reference to FIGS. 4 to 6.

Prevents the problem of blurring the focus due to the shaking of the mobile terminal when shooting

As a cause in which the subject is not clearly displayed on the photographed picture, the mobile terminal 100 is shaken due to hand shake or the like when the picture is taken, or the subject moves when the picture is taken. Hereinafter, in the embodiment described with reference to FIGS. 4 to 6, a control method for solving a problem occurring as a first cause. In addition, in an embodiment to be described later with reference to FIG. 8, it may be a control method for solving a problem caused by the second cause. In order to solve the problem in which the subject is not clearly visible, the control method for removing the two causes will be collectively referred to as a shake removal method.

4 is a diagram illustrating six domains for detecting shaking according to an embodiment of the present invention.

4, the x-axis 400a, y-axis 400b, and z-axis 400c with the mobile terminal 100 as the origin are shown, and the sensing unit 140 includes the x-axis 400a and y Shakes 401a, 401c, and 401e that sense movement in each direction of the axis 400b and z-axis 400c, and rotational shakes 401b, 401d, and 401f about each direction axis may be detected. The controller 180 can detect the movement (shaking direction) of the mobile terminal 100 during continuous shooting based on the detection result of 6 domains detected through the sensing unit 140, and based on the detected shaking direction. You will be able to do photo compositing.

A detailed method of synthesizing photos based on the shaking direction will be described with reference to FIG. 5.

5 is a diagram illustrating a conceptual diagram of a control method for performing photo synthesis based on a motion of the mobile terminal 100 detected during continuous shooting through a sensing unit.

In performing compositing using multiple photographed images, it will be necessary to basically align the position of the subject existing on each picture. This is because the shooting direction/position of the camera may be changed between each shooting of continuous shooting.

5A and 5C are diagrams illustrating the state of the mobile terminal 100 at the moment of each capturing when shooting is performed twice by continuous shooting by the mobile terminal 100. 5(a) shows a state in which the mobile terminal 100 is slightly inclined toward the predetermined subject 501 when photographing the predetermined subject 501. 5(c) shows a state in which the photographing direction is lifted up immediately before the mobile terminal 100 photographs a predetermined subject 501.

5(b) shows the first captured image 500-1 taken in the state of FIG. 5(a). It can be seen that a predetermined subject 501 is positioned in the central area of the first captured image 500-1. FIG. 5(d) shows the second captured image 500-2 taken in the state of FIG. 5(c), and may be an image successively taken after the first captured image 500-1. Immediately before the second photographed image 500-2 was photographed, the photographing direction of the camera was lifted upward, so that the predetermined subject 501 on the second photographed image 500-2 is a subject in the first photographed image. It will be moved downward by a predetermined distance d from the position 502 and exist.

In the synthesis of the first photographed image 500-1 and the second photographed image 500-2 to remove noise/shake, it should be synthesized in a state in which the position of the subject is matched. Therefore, in the mobile terminal 100 according to an embodiment of the present invention, the position of the subject on each photographed image is matched based on the shaking of the mobile terminal 100 detected through the sensing unit 140 during continuous shooting. I propose to let you do it.

6 shows a conceptual diagram of matching the position of a predetermined subject 501 by adjusting image offsets of the first and second photographed images 500-1 and 500-2.

Since the position of the predetermined subject 501 on the second photographed image 500-2 is lower than the position of the predetermined object 501 on the first photographed image by a predetermined distance d, the mobile terminal 100 is And in synthesizing the second photographed images 500-1 and 500-2, after adjusting the position offset of the second photographed image 500-2 by the predetermined distance d, the first photographed image 500-1 And can be synthesized (see Fig. 6).

In the embodiment described with reference to FIGS. 5 and 6, an embodiment in which the photographing direction of the mobile terminal 100 is lifted upward has been described, but the x-axis 400a and y-axis 400b described above with reference to FIG. 4 The same may be applied to a change in the photographing direction and a change in the position of the subject that are changed through movement/rotation shaking in the z-axis 400c direction.

A control method for removing noise will be described with reference to FIG. 7.

How to remove noise

7 is a diagram illustrating a control method for removing noise according to an embodiment of the present invention.

In general, noise is generated (deteriorated) due to an EV gain applied to a value sensed by an imaging device when photographing in a dark environment. This is because, when photographing in a dark environment, since the intensity of light sensed by the imaging device has a relatively small value, a high EV gain is applied, because such a high EV gain is equally applied to noise. Accordingly, in an embodiment of the present invention, it is proposed to filter noise by calculating an average value between corresponding pixels on a plurality of pictures taken through continuous shooting. In general, noise is generated randomly, so when an average is applied between pixels, a pixel value that changes due to noise may become close to an actual pixel value.

For example, suppose that the values of pixels (intensity of light sensed through the imaging device) corresponding to the same position on 6 consecutive shots are 10, 10, 9, 11, 4, 10, "9, A pixel having a value of 10, 11" may be a pixel without noise, but a pixel having a value of "4" may be regarded as a pixel with noise. Therefore, when the values of these pixels are averaged, "9" is calculated, because noise can be considered to have been removed because it is close to "10", which is a pixel value that is not mixed with noise.

Each of FIGS. 7A to 7C shows pixel structures of the first to third captured images 500-1 to 500-3.

On the other hand, in the description with reference to FIG. 7, it is assumed that the pixels at the same position show the shooting direction at the same position (ie, it is assumed that the capturing position of the mobile terminal is not changed during continuous shooting).

A1 existing on each photographed image, such as A1 pixel on the first photographed image 500-1, A1 pixel on the second photographed image 500-2, and A1 pixel on the third photographed image 500-3. The final A1 pixel value can be determined by averaging the pixel values. In this case, the final A1 pixel value means an A1 pixel of a noise filtered photo.

In addition to the A1 pixel, noise removal may be performed for each of the remaining pixels such as A2 and A3 through the same method.

On the other hand, the value of one pixel on the photo is determined by a combination of a result detected from an image pickup device of three colors of RGB (Red, Green, and Blue). Accordingly, in an embodiment of the present invention, the averaging operation may be performed for each RGB color. Alternatively, it is obvious that an average operation may be performed for each Y(luma) UV(chroma) value according to a method of encoding/decoding a color.

On the other hand, in the above-described noise removal method, the larger the number of target pixels for calculating the average, the more advantageous it is to remove noise. Accordingly, in an embodiment of the present invention, a level may be set in the noise removal method, and the number of photographed images used may be adjusted according to the set level.

Avoiding the problem of blurring the subject's movement

FIG. 8 is a diagram illustrating a control method of determining a subject with large movement or a region with large movement on pictures taken continuously according to an exemplary embodiment of the present invention.

8A to 8C, first to third photographed images 500-1 to 500-3 are shown, and each photographed image includes a predetermined person as a subject.

When each photographed image is analyzed, one hand 80 held by a predetermined person is shaking with a relatively large movement from side to side. That is, referring to FIG. 8(b), it exists in a position 81-2 different from the position 81-1 of one hand 80 in FIG. 8(a). Similarly, referring to FIG. 8(c), it exists in a position 82-2 different from the position 82-1 of one hand 80 in FIG. 8(b). That is, during continuous shooting, the movement of one hand 80 of a certain person is large, and it will be difficult to perform the synthesis on a partial area 800 in which the one hand 80 exists.

Accordingly, the mobile terminal 100 according to an embodiment of the present invention proposes to perform the synthesis of the corresponding partial area 800 by using a smaller number of photos. In this case, the synthesis may be a synthesis for removing the noise described above, or may be a synthesis for removing the shaking.

For example, in performing synthesis for the entire photo, assuming that 5 captured images are used for synthesizing the entire photo area, the synthesizing for the partial area 800 is 2 captured images (the highest sharpness). High images).

Meanwhile, even in the case of the above-described shake removal method, the greater the number of pictures used, the better the effect may be. In addition, in order to apply the blur removal method, the entire photo area is divided into a plurality of unit areas, and then shaking is detected (or the movement of the subject) by scanning each unit area. A more accurate removal will be possible. Accordingly, the level setting of the shaking removal method may be determined according to how small the size of the unit area is set. Finally, in detecting shaking (or movement of a subject) on the unit area, the level may be set differently according to a threshold value of a difference value (Diff, difference value) on a corresponding unit area on each captured image. When the threshold value of the difference value is 6, when the difference value is 0 to 6, it can be determined that there is no shaking, and when the difference value is 7 or more, it can be considered that there is shaking. Therefore, the lower the threshold of the difference value, the more accurately the shaking can be detected, and thus it will be applicable to the level setting. The mobile terminal 100 according to an embodiment of the present invention may perform a shake removal method according to a set level.

As described above, in an embodiment of the present invention, a clear and clear picture may be output by using a noise/shake removal method. Hereinafter, the noise/shake removal method will be collectively referred to as an OIS control method.

Hereinafter, a detailed method of setting the above-described OIS function will be described with reference to FIGS. 9 to 12.

9 is a diagram illustrating a state diagram of an OIS function setting screen according to an embodiment of the present invention. Since this state diagram is only an example, the embodiment of the present invention is not limited thereto.

Referring to FIG. 9A, the mobile terminal 100 may output an OIS activation button 901 for activating/deactivating the OIS function on the setting screen. In addition, it may include an automatic mode switching button 903-1 for switching to the automatic mode and a manual mode switching button 903-1 for switching to the manual mode. Here, the term “automatic/manual” indicates whether the number of photographed pictures is automatically set by the controller 180 or by a user during continuous shooting. The setting screen includes an indicator 902-2 for guiding the number of photographed pictures when the automatic mode is selected, and an indicator 903-2 for adjusting the number of photographed pictures when the manual mode is selected. It may contain more.

The setting screen may further include a photographing mode setting button 904 for setting a photographing mode and an OIS application region setting button 905 for setting an OIS application region.

When the photographing mode setting button 904 is selected, the mobile terminal 100 may output a setting screen (FIG. 9(b)) for setting the photographing mode. The setting screen for setting the photographing mode may provide a menu for selecting at least one of a night mode, a hand shake mode, a black box mode, and a user mode.

The night mode may mean a mode in which a noise removal level is set to be high. The hand-shake mode may mean a mode in which a sharpness level or a ghost effect removal level is set high. The black box mode may be a mode for low power consumption so that the same power can be used for a long time. The user mode may be a mode for a user to directly set the settings (noise removal level, sharpness level, etc.).

When the OIS application area setting button 905 is selected, the mobile terminal 100 may output a setting screen (FIG. 9(c)) for setting the OIS application area. This setting screen may provide a menu for selecting at least one of an all mode, a designated area mode, and a face area mode.

The full mode may refer to a mode in which the above-described OIS control method (noise removal, shake removal method) is applied to the entire area of pictures taken continuously. The designated area mode may mean a mode in which the above-described OIS control method is applied to an area designated by a user. A method of designating an area will be described in more detail with reference to FIG. 11. The face region mode may mean a mode in which the above-described OIS control method is applied to a face region recognized on a photo.

10 is a diagram illustrating a state diagram selected by a user from among a plurality of pictures taken continuously according to an embodiment of the present invention.

10(a) is a diagram showing a photographing state diagram for taking a picture in a state in which the camera is activated. Referring to the photographing state diagram, a preview screen 1000 for image data received through an activated camera is included.

As a photographing command is received, the mobile terminal 100 may take a plurality of photographs through continuous shooting. In addition, the mobile terminal 100 may output a preview thumbnail 1001 for a plurality of pictures taken continuously on the photographing state diagram. In an embodiment of the present invention, a check box 1002 may be further outputted to each thumbnail on the preview thumbnail 1001. According to a selection command received on the check box 1002 from the user, some/all of the preview thumbnails 1001 may be selected. Further, the mobile terminal 100 may perform photo synthesis by applying the OIS control method using the selected thumbnail.

11 is a diagram illustrating a state diagram for applying an OIS control method to only the designated area after receiving an area designation from a user according to an embodiment of the present invention.

11(a) is a diagram showing a photographing state diagram for taking a picture in a state in which the camera is activated. Likewise, referring to the photographing state diagram of FIG. 11A, a preview screen 1000 for image data received through an activated camera is included.

When inputs 10a and 10b to which a predetermined area 1101 is specified are received from a user on the preview screen 1000 (or on any one of the captured images), the controller 180 controls the specified area ( 1101), the application of the OIS control method will be possible.

Referring to the state diagram shown in FIG. 11B, a preview thumbnail 1102 of a predetermined area 1101 designated on a plurality of pictures taken continuously is output. In addition, each thumbnail of the preview thumbnail 1102 displays a check box 1103 together.

The mobile terminal 100 may apply the OIS control method based on the partial/all photographed images selected through the check box 1103.

In one embodiment of the present invention, furthermore, it is proposed to independently designate a level for a predetermined area 1101 designated by a user. A photographing state diagram related to such a control method will be described with reference to FIG. 12.

FIG. 12 is a diagram illustrating a photographing state diagram in which a level of an OIS control method for a predetermined area can be independently set according to an embodiment of the present invention.

As shown in FIG. 12(a), when a predetermined area 1101 is designated by a user, the controller 180 controls the level control indicators 1201-1 and 1201-2 to set the OIS control level on the photographing state diagram. ) Can be printed.

When each level is set through the level control indicators 1201-1 and 1201-2, the controller 180 may apply the OIS control method to the designated area 1101 based on the set level when applying the OIS control method. . That is, the level of OIS application to the entire image is applied to the level described above with reference to Table 1, but it may be applied to the designated area 1101 based on the independently set level.

The present invention described above can be implemented as a computer-readable code on a medium on which a program is recorded. The computer-readable medium includes all types of recording devices that store data that can be read by a computer system. Examples of computer-readable media include hard disk drives (HDDs), solid state disks (SSDs), silicon disk drives (SDDs), ROMs, RAM, CD-ROMs, magnetic tapes, floppy disks, optical data storage devices, etc. There is also a carrier wave (for example, transmission over the Internet) also includes the implementation of the form. In addition, the computer may include the control unit 180 of the terminal. Therefore, the detailed description above should not be construed as restrictive in all respects and should be considered as illustrative. The scope of the present invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the present invention are included in the scope of the present invention.

100: mobile terminal 110: wireless communication unit
120: input
140: sensing unit 150: output unit
160: interface unit 170: memory
180: control unit 190: power supply unit

Claims (20)

camera;
A sensing unit for detecting ambient brightness;
A user input unit for receiving a photographing command; And
As the photographing command is received, a first number of photos are continuously photographed,
A control unit for outputting a shake removal photo based on a second number of photo(s) selected by applying a preset algorithm divided into a plurality of application levels among the captured first number of photos,
The second number is determined based on the sensed ambient brightness,
The control unit controls the continuous shooting speed when continuously photographing the first number of pictures based on the detected ambient brightness.
Mobile terminal. delete The method of claim 1,
The control unit selects the determined second number of photo(s) based on sharpness among the taken first number of photos,
Mobile terminal. The method of claim 3, wherein the control unit,
Calculate a sharpness value of each of the first number of photographs taken,
Selecting the determined second number of photo(s) in the order in which the calculated sharpness value is high,
Mobile terminal. The method of claim 1,
Each pixel of the blur removal photo is composed of an average value of the corresponding pixel(s) of the selected second number of photo(s),
Mobile terminal. The method of claim 1,
The shake removal photo is a photo composed based on the second number of photo(s),
Mobile terminal. The method of claim 6,
Further comprising a sensing unit for detecting the movement of the mobile terminal during the continuous shooting,
The shake removal photo is a photo synthesized by adjusting a position offset of each of the second number of photos based on the detected motion,
Mobile terminal. The method of claim 1,
It further includes a touch screen,
The control unit outputs, through the touch screen, a thumbnail preview corresponding to the photographed second number of photo(s),
Mobile terminal. The method of claim 8,
Each of the thumbnail previews includes a check box,
The control unit outputs the shake removal photo based only on the photo selected through the check box among the second number of photo(s),
Mobile terminal. The method of claim 1,
Further comprising a touch screen for outputting a preview screen for one of the photographed first number of photo(s),
When an input for specifying a partial region on the preview screen is received from a user, the control unit outputs a shake removal photo based on the designated partial region(s) for each of the first number of photographs taken. doing,
Mobile terminal. Detecting ambient brightness;
Receiving a photographing command through a user input unit;
Continuously photographing a first number of photos through a camera when the photographing command is received; And
And outputting, by a controller, a shake removal photo based on a second number of photo(s) selected by applying a preset algorithm divided into a plurality of application levels among the captured first number of photos,
The second number is determined based on the sensed ambient brightness,
The control unit is characterized in that to control the continuous shooting speed when continuously photographing the first number of pictures based on the sensed ambient brightness.
Control method of mobile terminal. delete The method of claim 11,
The outputting may include selecting the determined second number of photo(s) based on sharpness among the captured first number of photos,
Control method of mobile terminal. The method of claim 13,
Further comprising the step of calculating a sharpness value of each of the captured first number of photos,
The outputting may include selecting the determined second number of photo(s) in the order in which the calculated sharpness value is high,
Control method of mobile terminal. The method of claim 11,
Each pixel of the blur removal photo is composed of an average value of the corresponding pixel(s) of the selected second number of photo(s),
Control method of mobile terminal. The method of claim 11,
The shake removal photo is a photo composed based on the second number of photo(s),
Control method of mobile terminal. The method of claim 16,
Further comprising the step of detecting the movement of the mobile terminal during the continuous shooting,
The shake removal photo is a photo synthesized by adjusting a position offset of each of the second number of photos based on the detected motion,
Control method of mobile terminal. The method of claim 11,
Further comprising the step of outputting a thumbnail preview corresponding to the photographed second number of photo(s) through a touch screen,
Control method of mobile terminal. The method of claim 18,
Each of the thumbnail previews includes a check box,
The outputting may include outputting the blur removal photo based only on the photo selected through the check box among the second number of photo(s),
Control method of mobile terminal. The method of claim 11,
The outputting step,
Further output a preview screen for one of the photographed first number of photo(s),
When an input for specifying a partial region on the preview screen is received from a user, outputting a shake removal photo based on the designated partial region(s) for each of the first number of photographs taken,
Control method of mobile terminal.

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