Patent Publication Number: US-2015084883-A1

Title: Mobile terminal and method for controlling the same

Description:
Pursuant to 35 U.S.C. §119(a), this application claims the benefit of earlier filing date and right of priority to Korean Application No. 10-2013-0112890, filed on Sep. 23, 2013, the contents of which are hereby incorporated by reference herein in their entirety. 
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a mobile terminal enabling a user to more conveniently use the terminal and a method of controlling therefor. 
     2. Discussion of the Related Art 
     A mobile terminal is a device which may be configured to perform various functions. Examples of such functions include data and voice communications, capturing images and video via a camera, recording audio, playing music files and outputting music via a speaker system, and displaying images and video on a display. Some terminals include additional functionality which supports game playing, while other terminals are also configured as multimedia players. More recently, mobile terminals have been configured to receive broadcast and multicast signals which permit viewing of contents, such as videos and television programs. 
     Generally, terminals can be classified into mobile terminals and stationary terminals according to a presence or non-presence of mobility. And, the mobile terminals can be further classified into handheld terminals and vehicle mount terminals according to availability for hand-carry. 
     There are ongoing efforts to support and increase the functionality of mobile terminals. Such efforts include software and hardware improvements, as well as changes and improvements in the structural components which form the mobile terminal. 
     Those terminals are recently mass produced and mass supplied in such a form as a smartphone and processing and/or storing huge data becomes available due to high hardware performance of the terminals. And, performance of a camera installed in a mobile terminal is also enhanced. This sort of performance enhancement in terms of the hardware not only increases quantity of images stored by receiving data but also increases quantity of images stored by capturing pictures. 
     In general, a mobile terminal provides a gallery application corresponding to an application used for reading image data. Yet, the image data are generally arranged in an order of dates that the image data are received or dates that the image data are captured by a camera in the gallery application and the gallery application shows the arranged images in sequential only. Hence, it is required to have a controlling method of the mobile terminal capable of searching for an image for which a user intends to search among a huge amount of the image data. 
     SUMMARY OF THE INVENTION 
     Accordingly, the present invention is directed to an apparatus and method thereof that substantially obviate one or more problems due to limitations and disadvantages of the related art. 
     The present invention is proposed to satisfy the aforementioned necessity. One object of the present invention is to provide a mobile terminal enabling a user to search for an image data preferred by the user among many numbers of stored image data and a method of controlling therefor. 
     Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings. 
     To achieve these objects and other advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, a mobile terminal includes a touch screen, a memory configured to store a plurality of images and a controller configured to recognize faces of persons included in each of a plurality of the stored images, the controller configured to output a face area designation pad in the touch screen, if an input for designating a face area on the outputted face area designation pad is received, the controller configured to search for an image matched with the designated face area. 
     To further achieve these objects and other advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, a method of controlling a mobile terminal includes the steps of storing a plurality of images, recognizing faces of persons contained in each of a plurality of the stored images, outputting a face area designation pad in the touch screen and if an input for designating a face area on the outputted face area designation pad is received, searching for an image matched with the designated face area. 
     It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above and other aspects, features, and advantages of the present invention will become more apparent upon consideration of the following description of preferred embodiments, taken in conjunction with the accompanying drawing figures. 
         FIG. 1  is a block diagram of a mobile terminal according to one embodiment of the present invention; 
         FIG. 2  is a front perspective diagram for one example of a mobile or portable terminal according to the present invention; 
         FIG. 3  is a rear perspective diagram of the mobile terminal shown in  FIG. 2 ; 
         FIG. 4  is a rear perspective diagram of a surface of a rear case exposed by separating a rear cover of a mobile terminal according to one embodiment of the present invention; 
         FIG. 5  is a diagram for recognizing a face included in an image and displaying a recognized result (face recognition information) together with the image according to one embodiment of the present invention; 
         FIG. 6  is a diagram for an image search mode to search for an image according to one embodiment of the present invention; 
         FIG. 7  is a diagram for a method of searching for an image in accordance with a first search mode according to one embodiment of the present invention; 
         FIG. 8  is a diagram for a method of performing a search operation using two or more tag search words according to one embodiment of the present invention; 
         FIG. 9  is a diagram for a method of searching for an image in accordance with a second search mode according to one embodiment of the present invention; 
         FIG. 10  is a diagram for an example of a method of searching for an image based on a position of a face according to one embodiment of the present invention; 
         FIG. 11  is a diagram for a method of searching for an image via a plurality of face areas in a second search mode according to one embodiment of the present invention; 
         FIG. 12  is a diagram for a method of searching for an image in accordance with a second search mode according to one embodiment of the present invention; 
         FIG. 13  is a diagram for a first example of a method of searching for an image in accordance with a third search mode according to one embodiment of the present invention; 
         FIG. 14  is a diagram for a second example of a method of searching for an image in accordance with a third search mode according to one embodiment of the present invention; 
         FIG. 15  is a diagram for a third example of a method of searching for an image in accordance with a third search mode according to one embodiment of the present invention; 
         FIG. 16  is a diagram for an example of a method of changing a position between designated face areas according to one embodiment of the present invention; 
         FIG. 17  to  FIG. 19  are diagrams for a fourth example of a method of searching for an image in accordance with a third search mode according to one embodiment of the present invention; 
         FIG. 20  is a diagram for a first example of a method of searching for an image in accordance with a fourth search mode according to one embodiment of the present invention; 
         FIG. 21  is a diagram for a second example of a method of searching for an image in accordance with a fourth search mode according to one embodiment of the present invention; 
         FIG. 22  and  FIG. 23  are diagrams for a method of searching for a group picture according to one embodiment of the present invention; 
         FIG. 24  is a diagram for a method of designating an area and a method of performing an image search by designating the number of persons in the designated area according to one embodiment of the present invention; 
         FIG. 25  is a diagram for a method of searching for an image in accordance with a fifth search mode according to one embodiment of the present invention; 
         FIG. 26  is a diagram for a method of utilizing a search result according to one embodiment of the present invention; 
         FIG. 27  is a diagram for a method of utilizing a search method according to one embodiment of the present invention; 
         FIG. 28  is a diagram for a method of searching for an image via an object recognition according to one embodiment of the present invention; 
         FIG. 29  is a diagram for a method of easily sharing an image based on a face recognition according to one embodiment of the present invention; 
         FIG. 30  is a flowchart for a method of searching for an image based on face recognition according to one embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     In the following detailed description, reference is made to the accompanying drawing figures which form a part hereof, and which show by way of illustration specific embodiments of the invention. It is to be understood by those of ordinary skill in this technological field that other embodiments may be utilized, and structural, electrical, as well as procedural changes may be made without departing from the scope of the present invention. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or similar parts. 
     As used herein, the suffixes ‘module’, ‘unit’ and ‘part’ are used for elements in order to facilitate the disclosure only. Therefore, significant meanings or roles are not given to the suffixes themselves and it is understood that the ‘module’, ‘unit’ and ‘part’ can be used together or interchangeably. 
     The present invention can be applicable to a various types of terminals. Examples of such terminals include mobile terminals, such as mobile phones, user equipment, smart phones, mobile computers, digital broadcast terminals, personal digital assistants, portable multimedia players (PMP) and navigators. 
       FIG. 1  is a block diagram of a mobile terminal  100  in accordance with an embodiment of the present invention.  FIG. 1  shows the mobile terminal  100  according to one embodiment of the present invention includes a wireless communication unit  110 , an A/V (audio/video) input unit  120 , a user input unit  130 , a sensing unit  140 , an output unit  150 , a memory  160 , an interface unit  170 , a controller  180 , a power supply unit  190  and the like.  FIG. 1  shows the mobile terminal  100  having various components, but it is understood that implementing all of the illustrated components is not a requirement. Greater or fewer components may alternatively be implemented. 
     In the following description, the above elements of the mobile terminal  100  are explained in sequence. 
     First of all, the wireless communication unit  110  typically includes one or more components which permits wireless communication between the mobile terminal  100  and a wireless communication system or network within which the mobile terminal  100  is located. For instance, the wireless communication unit  110  can include a broadcast receiving module  111 , a mobile communication module  112 , a wireless internet module  113 , a short-range communication module  114 , a position-location module  115  and the like. 
     The broadcast receiving module  111  receives a broadcast signal and/or broadcast associated information from an external broadcast managing server via a broadcast channel. 
     The broadcast channel may include a satellite channel and a terrestrial channel. 
     The broadcast managing server generally refers to a server which generates and transmits a broadcast signal and/or broadcast associated information or a server which is provided with a previously generated broadcast signal and/or broadcast associated information and then transmits the provided signal or information to a terminal. The broadcast signal may be implemented as a TV broadcast signal, a radio broadcast signal, and a data broadcast signal, among others. If desired, the broadcast signal may further include a broadcast signal combined with a TV or radio broadcast signal. 
     At least two broadcast receiving modules  111  can be provided to the mobile terminal  100  in pursuit of simultaneous receptions of at least two broadcast channels or broadcast channel switching facilitation. 
     The broadcast associated information includes information associated with a broadcast channel, a broadcast program, a broadcast service provider, etc. And, the broadcast associated information can be provided via a mobile communication network. In this case, the broadcast associated information can be received by the mobile communication module  112 . 
     The broadcast associated information can be implemented in various forms. For instance, broadcast associated information may include an electronic program guide (EPG) of digital multimedia broadcasting (DMB) and electronic service guide (ESG) of digital video broadcast-handheld (DVB-H). 
     The broadcast receiving module  111  may be configured to receive broadcast signals transmitted from various types of broadcast systems. By nonlimiting example, such broadcasting systems include digital multimedia broadcasting-terrestrial (DMB-T), digital multimedia broadcasting-satellite (DMB-S), digital video broadcast-handheld (DVB-H), DVB-CBMS, OMA-BCAST, the data broadcasting system known as media forward link only (MediaFLO®) and integrated services digital broadcast-terrestrial (ISDB-T). Optionally, the broadcast receiving module  111  can be configured suitable for other broadcasting systems as well as the above-explained digital broadcasting systems. 
     The broadcast signal and/or broadcast associated information received by the broadcast receiving module  111  may be stored in a suitable device, such as a memory  160 . 
     The mobile communication module  112  transmits/receives wireless signals to/from one or more network entities (e.g., base station, external terminal, server, etc.) via a mobile network such as GSM (Gobal System for Mobile communications), CDMA (Code Division Multiple Access), WCDMA (Wideband CDMA) and so on. Such wireless signals may represent audio, video, and data according to text/multimedia message transceivings, among others. 
     The wireless internet module  113  supports Internet access for the mobile terminal  100 . This module may be internally or externally coupled to the mobile terminal  100 . In this case, the wireless Internet technology can include WLAN (Wireless LAN) (Wi-Fi), Wibro (Wireless broadband), Wimax (World Interoperability for Microwave Access), HSDPA (High Speed Downlink Packet Access), GSM, CDMA, WCDMA, LTE (Long Term Evolution) etc. 
     Wireless internet access by Wibro, HSPDA, GSM, CDMA, WCDMA, LTE or the like is achieved via a mobile communication network. In this aspect, the wireless internet module  113  configured to perform the wireless internet access via the mobile communication network can be understood as a sort of the mobile communication module  112 . 
     The short-range communication module  114  facilitates relatively short-range communications. Suitable technologies for implementing this module include radio frequency identification (RFID), infrared data association (IrDA), ultra-wideband (UWB), as well at the networking technologies commonly referred to as Bluetooth and ZigBee, to name a few. 
     The position-location module  115  identifies or otherwise obtains the location of the mobile terminal  100 . If desired, this module may be implemented with a global positioning system (GPS) module. 
     According to the current technology, the GPS module  115  is able to precisely calculate current 3-dimensional position information based on at least one of longitude, latitude and altitude and direction (or orientation) by calculating distance information and precise time information from at least three satellites and then applying triangulation to the calculated information. Currently, location and time informations are calculated using three satellites, and errors of the calculated location position and time informations are then amended using another satellite. Besides, the GPS module  115  is able to calculate speed information by continuously calculating a real-time current location. 
     Referring to  FIG. 1 , the audio/video (A/V) input unit  120  is configured to provide audio or video signal input to the mobile terminal  100 . As shown, the A/V input unit  120  includes a camera  121  and a microphone  122 . The camera  121  receives and processes image frames of still pictures or video, which are obtained by an image sensor in a video call mode or a photographing mode. And, the processed image frames can be displayed on the display  151 . 
     The image frames processed by the camera  121  can be stored in the memory  160  or can be externally transmitted via the wireless communication unit  110 . Optionally, at least two cameras  121  can be provided to the mobile terminal  100  according to environment of usage. 
     The microphone  122  receives an external audio signal while the portable device is in a particular mode, such as phone call mode, recording mode and voice recognition. This audio signal is processed and converted into electric audio data. The processed audio data is transformed into a format transmittable to a mobile communication base station via the mobile communication module  112  in case of a call mode. The microphone  122  typically includes assorted noise removing algorithms to remove noise generated in the course of receiving the external audio signal. 
     The user input unit  130  generates input data responsive to user manipulation of an associated input device or devices. Examples of such devices include a keypad, a dome switch, a touchpad (e.g., static pressure/capacitance), a jog wheel, a jog switch, etc. 
     The sensing unit  140  provides sensing signals for controlling operations of the mobile terminal  100  using status measurements of various aspects of the mobile terminal. For instance, the sensing unit  140  may detect an open/close status of the mobile terminal  100 , relative positioning of components (e.g., a display and keypad) of the mobile terminal  100 , a change of position of the mobile terminal  100  or a component of the mobile terminal  100 , a presence or absence of user contact with the mobile terminal  100 , orientation or acceleration/deceleration of the mobile terminal  100 , and free-falling of the mobile terminal  100 . As an example, consider the mobile terminal  100  being configured as a slide-type mobile terminal. In this configuration, the sensing unit  140  may sense whether a sliding portion of the mobile terminal is open or closed. Other examples include the sensing unit  140  sensing the presence or absence of power provided by the power supply  190 , the presence or absence of a coupling or other connection between the interface unit  170  and an external device. And, the sensing unit  140  can include a proximity sensor  141 . 
     The output unit  150  generates outputs relevant to the senses of sight, hearing, touch and the like. And, the output unit  150  includes the display  151 , an audio output module  152 , an alarm unit  153 , a haptic module  154 , a projector module  155  and the like. 
     The display  151  is typically implemented to visually display (output) information associated with the mobile terminal  100 . For instance, if the mobile terminal is operating in a phone call mode, the display will generally provide a user interface (UI) or graphical user interface (GUI) which includes information associated with placing, conducting, and terminating a phone call. As another example, if the mobile terminal  100  is in a video call mode or a photographing mode, the display  151  may additionally or alternatively display images which are associated with these modes, the UI or the GUI. 
     The display module  151  may be implemented using known display technologies including, for example, a liquid crystal display (LCD), a thin film transistor-liquid crystal display (TFT-LCD), an organic light-emitting diode display (OLED), a flexible display and a three-dimensional display. The mobile terminal  100  may include one or more of such displays. 
     Some of the above displays can be implemented in a transparent or optical transmittive type, which can be named a transparent display. As a representative example for the transparent display, there is TOLED (transparent OLED) or the like. A rear configuration of the display  151  can be implemented in the optical transmittive type as well. In this configuration, a user is able to see an object in rear of a terminal body via the area occupied by the display  151  of the terminal body. 
     At least two displays  151  can be provided to the mobile terminal  100  in accordance with the implemented configuration of the mobile terminal  100 . For instance, a plurality of displays can be arranged on a single face of the mobile terminal  100  in a manner of being spaced apart from each other or being built in one body. Alternatively, a plurality of displays can be arranged on different faces of the mobile terminal  100 . 
     In case that the display  151  and a sensor for detecting a touch action (hereinafter called ‘touch sensor’) configures a mutual layer structure (hereinafter called ‘touchscreen’), it is able to use the display  151  as an input device as well as an output device. In this case, the touch sensor can be configured as a touch film, a touch sheet, a touchpad or the like. 
     The touch sensor can be configured to convert a pressure applied to a specific portion of the display  151  or a variation of a capacitance generated from a specific portion of the display  151  to an electric input signal. Moreover, it is able to configure the touch sensor to detect a pressure of a touch as well as a touched position or size. 
     If a touch input is made to the touch sensor, signal(s) corresponding to the touch is transferred to a touch controller. The touch controller processes the signal(s) and then transfers the processed signal(s) to the controller  180 . Therefore, the controller  180  is able to know whether a prescribed portion of the display  151  is touched. 
     Referring to  FIG. 1 , a proximity sensor ( 141 ) can be provided to an internal area of the mobile terminal  100  enclosed by the touchscreen or around the touchscreen. The proximity sensor is the sensor that detects a presence or non-presence of an object approaching a prescribed detecting surface or an object existing around the proximity sensor using an electromagnetic field strength or infrared ray without mechanical contact. Hence, the proximity sensor has durability longer than that of a contact type sensor and also has utility wider than that of the contact type sensor. 
     The proximity sensor can include one of a transmittive photoelectric sensor, a direct reflective photoelectric sensor, a mirror reflective photoelectric sensor, a radio frequency oscillation proximity sensor, an electrostatic capacity proximity sensor, a magnetic proximity sensor, an infrared proximity sensor and the like. In case that the touchscreen includes the electrostatic capacity proximity sensor, it is configured to detect the proximity of a pointer using a variation of electric field according to the proximity of the pointer. In this case, the touchscreen (touch sensor) can be classified as the proximity sensor. 
     The proximity sensor detects a proximity touch and a proximity touch pattern (e.g., a proximity touch distance, a proximity touch duration, a proximity touch position, a proximity touch shift state, etc.). And, information corresponding to the detected proximity touch action and the detected proximity touch pattern can be outputted to the touchscreen. 
     The audio output module  152  functions in various modes including a call-receiving mode, a call-placing mode, a recording mode, a voice recognition mode, a broadcast reception mode and the like to output audio data which is received from the wireless communication unit  110  or is stored in the memory  160 . During operation, the audio output module  152  outputs audio relating to a particular function (e.g., call received, message received, etc.). The audio output module  152  is often implemented using one or more speakers, buzzers, other audio producing devices, and combinations thereof. 
     The alarm unit  153  is output a signal for announcing the occurrence of a particular event associated with the mobile terminal  100 . Typical events include a call received event, a message received event and a touch input received event. The alarm unit  153  is able to output a signal for announcing the event occurrence by way of vibration as well as video or audio signal. The video or audio signal can be outputted via the display  151  or the audio output unit  152 . Hence, the display  151  or the audio output module  152  can be regarded as a part of the alarm unit  153 . 
     The haptic module  154  generates various tactile effects that can be sensed by a user. Vibration is a representative one of the tactile effects generated by the haptic module  154 . Strength and pattern of the vibration generated by the haptic module  154  are controllable. For instance, different vibrations can be outputted in a manner of being synthesized together or can be outputted in sequence. 
     The haptic module  154  is able to generate various tactile effects as well as the vibration. For instance, the haptic module  154  generates the effect attributed to the arrangement of pins vertically moving against a contact skin surface, the effect attributed to the injection/suction power of air though an injection/suction hole, the effect attributed to the skim over a skin surface, the effect attributed to the contact with electrode, the effect attributed to the electrostatic force, the effect attributed to the representation of hold/cold sense using an endothermic or exothermic device and the like. 
     The haptic module  154  can be implemented to enable a user to sense the tactile effect through a muscle sense of finger, arm or the like as well as to transfer the tactile effect through a direct contact. Optionally, at least two haptic modules  154  can be provided to the mobile terminal  100  in accordance with the corresponding configuration type of the mobile terminal  100 . 
     The projector module  155  is the element for performing an image projector function using the mobile terminal  100 . And, the projector module  155  is able to display an image, which is identical to or partially different at least from the image displayed on the display unit  151 , on an external screen or wall according to a control signal of the controller  180 . 
     In particular, the projector module  155  can include a light source (not shown in the drawing) generating light (e.g., laser) for projecting an image externally, an image producing means (not shown in the drawing) for producing an image to output externally using the light generated from the light source, and a lens (not shown in the drawing) for enlarging to output the image externally in a predetermined focus distance. And, the projector module  155  can further include a device (not shown in the drawing) for adjusting an image projected direction by mechanically moving the lens or the whole module. 
     The projector module  155  can be classified into a CRT (cathode ray tube) module, an LCD (liquid crystal display) module, a DLP (digital light processing) module or the like according to a device type of a display means. In particular, the DLP module is operated by the mechanism of enabling the light generated from the light source to reflect on a DMD (digital micro-mirror device) chip and can be advantageous for the downsizing of the projector module  151 . 
     Preferably, the projector module  155  can be provided in a length direction of a lateral, front or backside direction of the mobile terminal  100 . And, it is understood that the projector module  155  can be provided to any portion of the mobile terminal  100  according to the necessity thereof. 
     The memory unit  160  is generally used to store various types of data to support the processing, control, and storage requirements of the mobile terminal  100 . Examples of such data include program instructions for applications operating on the mobile terminal  100 , contact data, phonebook data, messages, audio, still pictures (or photo), moving pictures, etc. And, a recent use history or a cumulative use frequency of each data (e.g., use frequency for each phonebook, each message or each multimedia) can be stored in the memory unit  160 . Moreover, data for various patterns of vibration and/or sound outputted in case of a touch input to the touchscreen can be stored in the memory unit  160 . 
     The memory  160  may be implemented using any type or combination of suitable volatile and non-volatile memory or storage devices including hard disk, random access memory (RAM), static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disk, multimedia card micro type memory, card-type memory (e.g., SD memory, XD memory, etc.), or other similar memory or data storage device. And, the mobile terminal  100  is able to operate in association with a web storage for performing a storage function of the memory  160  on Internet. 
     The interface unit  170  is often implemented to couple the mobile terminal  100  with external devices. The interface unit  170  receives data from the external devices or is supplied with the power and then transfers the data or power to the respective elements of the mobile terminal  100  or enables data within the mobile terminal  100  to be transferred to the external devices. The interface unit  170  may be configured using a wired/wireless headset port, an external charger port, a wired/wireless data port, a memory card port, a port for coupling to a device having an identity module, audio input/output ports, video input/output ports, an earphone port and/or the like. 
     The identity module is the chip for storing various kinds of information for authenticating a use authority of the mobile terminal  100  and can include User Identify Module (UIM), Subscriber Identify Module (SIM), Universal Subscriber Identity Module (USIM) and/or the like. A device having the identity module (hereinafter called ‘identity device’) can be manufactured as a smart card. Therefore, the identity device is connectible to the mobile terminal  100  via the corresponding port. 
     When the mobile terminal  110  is connected to an external cradle, the interface unit  170  becomes a passage for supplying the mobile terminal  100  with a power from the cradle or a passage for delivering various command signals inputted from the cradle by a user to the mobile terminal  100 . Each of the various command signals inputted from the cradle or the power can operate as a signal enabling the mobile terminal  100  to recognize that it is correctly loaded in the cradle. 
     The controller  180  typically controls the overall operations of the mobile terminal  100 . For example, the controller  180  performs the control and processing associated with voice calls, data communications, video calls, etc. The controller  180  may include a multimedia module  181  that provides multimedia playback. The multimedia module  181  may be configured as part of the controller  180 , or implemented as a separate component. 
     Moreover, the controller  180  is able to perform a pattern (or image) recognizing process for recognizing a writing input and a picture drawing input carried out on the touchscreen as characters or images, respectively. 
     The power supply unit  190  provides power required by the various components for the mobile terminal  100 . The power may be internal power, external power, or combinations thereof. 
     Various embodiments described herein may be implemented in a computer-readable medium using, for example, computer software, hardware, or some combination thereof. For a hardware implementation, the embodiments described herein may be implemented within one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), processors, controllers, micro-controllers, microprocessors, other electronic units designed to perform the functions described herein, or a selective combination thereof. Such embodiments may also be implemented by the controller  180 . 
     For a software implementation, the embodiments described herein may be implemented with separate software modules, such as procedures and functions, each of which perform one or more of the functions and operations described herein. The software codes can be implemented with a software application written in any suitable programming language and may be stored in memory such as the memory  160 , and executed by a controller or processor, such as the controller  180 . 
       FIG. 2  is a front perspective diagram of a mobile terminal according to one embodiment of the present invention. 
     The mobile terminal  100  shown in the drawing has a bar type terminal body. Yet, the mobile terminal  100  may be implemented in a variety of different configurations. Examples of such configurations include folder-type, slide-type, rotational-type, swing-type and combinations thereof. For clarity, further disclosure will primarily relate to a bar-type mobile terminal  100 . However such teachings apply equally to other types of mobile terminals. 
     Referring to  FIG. 2 , the mobile terminal  100  includes a case (casing, housing, cover, etc.) configuring an exterior thereof. In the present embodiment, the case can be divided into a front case  101  and a rear case  102 . Various electric/electronic parts are loaded in a space provided between the front and rear cases  101  and  102 . Optionally, at least one middle case can be further provided between the front and rear cases  101  and  102  in addition. 
     The cases  101  and  102  are formed by injection molding of synthetic resin or can be formed of metal substance such as stainless steel (STS), titanium (Ti) or the like for example. 
     A display  151 , an audio output unit  152 , a camera  121 , user input units  130 / 131  and  132 , a microphone  122 , an interface  180  and the like can be provided to the terminal body, and more particularly, to the front case  101 . 
     The display  151  occupies most of a main face of the front case  101 . The audio output unit  151  and the camera  121  are provided to an area adjacent to one of both end portions of the display  151 , while the user input unit  131  and the microphone  122  are provided to another area adjacent to the other end portion of the display  151 . The user input unit  132  and the interface  170  can be provided to lateral sides of the front and rear cases  101  and  102 . 
     The input unit  130  is manipulated to receive a command for controlling an operation of the terminal  100 . And, the input unit  130  is able to include a plurality of manipulating units  131  and  132 . The manipulating units  131  and  132  can be named a manipulating portion and may adopt any mechanism of a tactile manner that enables a user to perform a manipulation action by experiencing a tactile feeling. 
     Content inputted by the first or second manipulating unit  131  or  132  can be diversely set. For instance, such a command as start, end, scroll and the like is inputted to the first manipulating unit  131 . And, a command for a volume adjustment of sound outputted from the audio output unit  152 , a command for a switching to a touch recognizing mode of the display  151  or the like can be inputted to the second manipulating unit  132 . 
       FIG. 3  is a perspective diagram of a backside of the terminal shown in  FIG. 2 . 
     Referring to  FIG. 3 , a camera  121 ′ can be additionally provided to a backside of the terminal body, and more particularly, to the rear case  102 . The camera  121  has a photographing direction that is substantially opposite to that of the former camera  121  shown in  FIG. 21A  and may have pixels differing from those of the firmer camera  121 . 
     Preferably, for instance, the former camera  121  has low pixels enough to capture and transmit a picture of user&#39;s face for a video call, while the latter camera  121 ′ has high pixels for capturing a general subject for photography without transmitting the captured subject. And, each of the cameras  121  and  121 ′ can be installed at the terminal body to be rotated or popped up. 
     A flash  123  and a mirror  124  are additionally provided adjacent to the camera  121 ′. The flash  123  projects light toward a subject in case of photographing the subject using the camera  121 ′. In case that a user attempts to take a picture of the user (self-photography) using the camera  121 ′, the mirror  124  enables the user to view user&#39;s face reflected by the mirror  124 . 
     An additional audio output unit  152 ′ can be provided to the backside of the terminal body. The additional audio output unit  152 ′ is able to implement a stereo function together with the former audio output unit  152  shown in  FIG. 2  and may be used for implementation of a speakerphone mode in talking over the terminal. 
     A broadcast signal receiving antenna  116  can be additionally provided to the lateral side of the terminal body as well as an antenna for communication or the like. The antenna  116  constructing a portion of the broadcast receiving module  111  shown in  FIG. 1  can be retractably provided to the terminal body. 
       FIG. 4  is a rear perspective diagram of a surface of a rear case exposed by separating a rear cover of a mobile terminal according to one embodiment of the present invention. 
     Referring to  FIG. 4 , a front case  101 , a rear case  102 , a rear cover (or a battery cover)  103 , a camera  121 ′, an interface unit  170 , a microphone  122 , a speaker module  154 , an audio output unit  152 ′, a battery  191 , a battery loading unit  104 , a USIM card loading unit  166 , and a memory card loading unit  167  are provided. 
     A space for mounting such an external part as the battery loading unit  104 , the USIM card loading unit  105 , the memory card loading unit  106  and the like can be provided to a surface of the rear case  102 . Generally, the external part loaded on the surface of the rear case  102  is provided to extend functions of the mobile terminal  100  in order to meet the diversified functions of the mobile terminal and a variety of the consumer&#39;s needs. 
     As the performance of the mobile terminal gets diverse, the battery  191  can be configured as a replaceable type, as shown in  FIG. 4 , to complement a considerable amount of power consumption. In case that the replaceable type is adopted, the battery loading unit  104  is formed on the surface of the rear case  102  to enable a user to detach the corresponding battery. In this case, a contact terminal is provided to the battery loading unit  104  to be electrically connected to a part installed within the case. 
     The USIM card loading unit  166  or the memory card loading unit  167  may be provided, as shown in  FIG. 4 , next to the battery loading unit  104 . Alternatively, the USIM card loading unit  166  or the memory card loading unit  167  may be provided to a bottom surface of the battery loading unit  104 . Hence, the battery  191  can be externally exposed if the battery  191  is unloaded from the battery loading unit  104 . In this case, since a size of the battery loading unit  104  is extensible, the battery  191  can be oversized. 
     Although  FIG. 4  shows the configuration that the USIM card loading unit  166  or the memory card loading unit  167  is mounted on a backside of the rear case  102 , it can be inserted in or separated from the mobile terminal  100  in a manner of being inserted in a lateral side of the rear case  102 . 
     The rear cover  103  covers the surface of the rear case  102 . Hence, the rear cover  103  can fix the battery,  191 , the USIM card, the memory card and the lime not to be separated from the rear case  102  and also protects the external parts from external shocks or particles. Recently, a waterproof function is added to the mobile terminal  100 . In order to prevent the external parts from contacting with water, the mobile terminal  100  can further include a waterproof structure. Hence, when rear case  102  and the rear cover  103  are connected to each other, the waterproof structure can seal up the gap between the rear case  102  and the rear cover  103 . 
     In the following, a face recognition within an image and face recognition information are explained with reference to  FIG. 5 . 
     For clarity of drawings, a case forming an exterior of the mobile terminal  100  is omitted in a drawing used for explaining one embodiment of the present invention to be explained in the following. Instead, a diagram of a screen, which is displayed in a touch screen  151  of the mobile terminal  100 , is depicted only. 
       FIG. 5  is a diagram for recognizing a face included in an image and displaying a recognized result (face recognition information) together with the image according to one embodiment of the present invention. 
       FIG. 5  ( a ) is a diagram for generally reading a picture and an image displayed in  FIG. 5  ( a ) includes 3 persons. The controller  180  according to one embodiment of the present invention can recognize a face of each person included in the image via an algorithm capable of analyzing faces belong to the image. The algorithm analyzes eyes, a nose, or a mouth of a person in the image and can recognize a face of the person using the analyzed eyes, the nose, or the mouth. In the following detailed explanation explaining one embodiment of the present invention, a result recognized by the algorithm shall be called face recognition information. The face recognition information may include relative location information of the recognized face in a whole area to which the image is outputted. And, if a plurality of persons appear in a picture, the face recognition information may correspond to individual information on at least one person among a plurality of the persons. Hence, if a plurality of persons appear in an image, the face recognition information of the image may include a face recognition result for at least one person among a plurality of the persons. 
       FIG. 5  ( b ) is a diagram for distinctively displaying recognized faces. The controller  180  can also output face indicators  501 - 1  to  501 - 3  on the recognized faces in an outputted picture. In particular, the controller  180  can also display the face indicators  501 - 1  to  501 - 3  together with the output of the picture based on location information of faces included in the analyzed face recognition information. 
     Moreover, the algorithm can distinguish a person from the persons whose faces are recognized in a manner of analyzing a feature of eyes, a node, or a mouth, which varies according to every single person. In particular, the controller  180  can determine whether a face recognized in the picture is identical to a face appearing in pictures pre-stored in the contact in manner of comparing the faces with each other. By doing so, if it is determined that the face recognized in the picture is identical to the face pre-stored in the contact, the controller  180  may further display additional information on a corresponding person which is stored in the contact of the person. 
     In particular, the controller  180  analyzes a face in an image, identifies the face, and may be then able to match the face with specific contact information. And, the matched contact information can be additionally displayed in the image. 
     As depicted in an example of  FIG. 5  ( c ), the controller  180  can output a name tag  502 - 1  to  502 - 3  for the persons whose faces are recognized as the additional information together with the picture, as an example of the additional information. 
     A method of searching for an image according to one embodiment of the present invention intends to provide environment capable of more easily searching for an image based on the aforementioned face recognition result. And, the method proposes a method capable of further searching for additional information pre-stored in the contact based on the face recognition result and capable of searching for an image based on the searched additional information. In particular, if a specific person included in an image is identified as a person stored in the contact, the controller  180  can further store contact information of the specific person as tag information on the image. In this case, such various information capable of being generally included in the contact information as a name of the person, a telephone number, a home address, and the like can be included in the contact information. 
     Meanwhile, the aforementioned face recognition result can be stored as tag information together with the image or a picture search operation can be performed in a manner of performing a face recognition whenever a search for an image is performed. And, the controller  180  may store the additional information, which is searched based on the face recognition result, as the tag information. 
       FIG. 6  is a diagram for an image search mode to search for an image according to one embodiment of the present invention. 
     In an image search mode according to one embodiment of the present invention, a drawing tool area  601 , a face area designation pad  602 , a tag search word list  603  and a search result area  604  can be outputted. 
     The face area designation pad  602  is an area used for receiving an input of a search condition according to one embodiment of the present invention. In particular, the face area designation pad may correspond to a drawing pad capable of inputting a tag search word or drawing a position in which a face is appearing. 
     In particular, the face area designation pad  602  is an area used for designating a face area as a search condition according to one embodiment of the present invention. When a user generally recalls a preferred image, the user may firstly recall a person included in the image and a position of the person included in the image. Hence, one embodiment of the present invention proposes a method of searching for an image using a relative position in which a face exists among an area where a picture is outputted. In particular, if a face area is designated on the face area designation pad  602  by a user, the controller  180  can search for pictures whose face are outputted in a position corresponding to the designated face area. 
     Moreover, the controller  180  according to one embodiment of the present invention can display one of the images for which a search has performed in the face area designation pad  602 . 
     The drawing tool area  601  may include tool items used for designating a face area on the face area designation pad  602  by a user. The tool items may include a pencil tool, an eraser tool, a going backward tool, a going forward tool and the like. 
     A user may designate a prescribed area using the pencil tool. For instance, if an input for forming a looped curve is received using the pencil tool, the controller  180  can recognize an inner area of the formed looped curved as a face area corresponding to the aforementioned search condition. 
     The user may delete a path and/or the looped curve formed by using the pencil tool using the eraser tool. 
     In the following description, explanation on items, which are not necessary for explaining embodiment of the present invention, among the tools included in the drawing tool area  601  is omitted. 
     The tag search word list  603  indicates a list (e.g., list of names of persons stored in the contact) of tag search words according to one embodiment of the present invention. The tag search word list  603  may correspond to at least one selected from the group consisting of a most frequently used tag search word, a recently searched tag search word and a user configuration list. 
     The search result area  604  corresponds to an area outputting at least one image searched by the controller  180  according to one embodiment of the present invention. If a searched result includes a plurality of images, the controller  180  can display a plurality of the images in the search result area  604 . If all of a plurality of the images cannot be displayed in the search result area since a space of the search result area is not sufficient, a scroll operation can be used for displaying all of a plurality of the images. 
     In the following description, embodiments of the present invention are explained based on the diagram of the aforementioned image search mode with reference to  FIG. 6 . 
     First Search Mode—Tag Search Mode 
       FIG. 7  is a diagram for a method of searching for an image in accordance with a first search mode according to one embodiment of the present invention. 
     In a first search mode, it is proposed that an image search is performed based on a tag search word. In particular, a name of a specific person, a telephone number, or the like is used as a search word and environment capable of searching for an image (image including a face of the specific person) including the specific person corresponding to the search word is provided in the first search mode. In this case, names of persons included in the image and/or telephone numbers should be stored as tag information on the image. According to one embodiment of the present invention, the names and/or telephone numbers can be stored as the tag information on the image in a manner of performing the face recognition and the contact matching as mentioned in the foregoing description. 
     As an example, when a user intends to search for an image including a person whose name is ‘Eunhee Ahn’, the user can input ‘Eunhee Ahn’ as a tag search word. If ‘Eunhee Ahn’ is inputted as the tag search word, the controller  180  according to one embodiment of the present invention can search for images including ‘Eunhee Ahn’ as tag information among stored images. 
     In particular, one embodiment of the present invention proposes to search for the tag information to search for whether a specific person is included in an image. As mentioned in the foregoing description, if a face recognition operation is performed for the specific person belonging to the image, additional information (name, address and the like) on the person can be stored as the tag information on the image via a comparison with an image of the pre-stored contact. 
     Moreover, in one embodiment of the present invention, if inputs  10   a  and  11   a  for selecting a prescribed tag search word from a tag search word list  603  are received, the controller  180  can perform an image search based on the selected tag search word. In this case, the inputs for selecting the prescribed search word may correspond to an input touching  10   a  a preferred tag search word  701 - 1  among the tag search word list  603  and dragging  11   a  the tag search word to a direction of the face area designation pad  602  while the touch  10   a  is maintained. In particular, in inputting a tag search word, since a direct input of the tag search word via typing may be inconvenient, one embodiment of the present invention can make the tag search word input to be more convenient in a manner of outputting the tag search word list  603  and selecting one tag search word from the tag search word list  603 . 
       FIG. 7  ( b ) shows a screen outputting a search result in case that a tag search word  701 - 1  such as ‘Eunhee Ahn’ is selected from the tag search word list  603 . As depicted in  FIG. 7  ( b ), if the tag search word  701 - 1  such as ‘Eunhee Ahn’ is selected, the controller  180  can control the tag search word  701 - 1  to be outputted in the face area designation pad  602 . 
     The controller  180  searches for an image including such tag information as ‘Eunhee Ahn’ among a plurality of images stored in the memory  160  and can output searched result image(s) in the search result area  604 . As depicted in an example of  FIG. 7  ( b ), 4 images are outputted in the search result area  604  and an indicator indicating that there further exists a searched image can be further outputted in the bottom of the 4 images. In this case, a user can read more search result images in a manner of scrolling the search result area  604 . 
     Meanwhile, in embodiments of the present invention, if a search command is received from the user, the controller  180  may perform a search operation in response to the received search command. Yet, if a search condition is changed (if the search condition is added or deleted) on the face area designation pad  602 , the controller may update a search result in response to the changed search condition. 
     The method of performing a search operation using one tag search word is explained in  FIG. 7 . Yet, the search operation can be performed using two or more tag search words. Regarding this, it shall be described with reference to  FIG. 8 . 
       FIG. 8  is a diagram for a method of performing a search operation using two or more tag search words according to one embodiment of the present invention. 
     Referring to  FIG. 8  ( a ), similar to  FIG. 7  ( b ), such a tag search word  701 - 1  as ‘Eunhee Ahn’ is outputted in the face area designation pad  602  by the controller  180 . In particular, assume that the tag search word  701 - 1  such as ‘Eunhee Ahn’ is already inputted as a search condition. 
     A user intends to configure an image search condition including such a person as ‘Eunhee Ahn’ and such a person as ‘Younh jung Seo’ to search for a preferred image. If the user inputs ‘Eunhee Ahn’ and ‘Young jung Seo’ in the mobile terminal  100  according to one embodiment of the present invention as tag search words, the mobile terminal searches for images including all of the inputted tags and can output the images for the user. 
     In particular, if inputs  10   b  and  11   b  for selecting such a tag search word  701 - 2  as ‘Young jung Seo’ in a state shown in  FIG. 8  ( a ), the controller  180  can search for images including all of the two inputted tag search words  701 - 1  and  701 - 2 . In this case, the input for selecting the tag search word may correspond to an input touching  10   b  a preferred tag search word  701 - 2  among the tag search word list  603  and dragging  11   b  the tag search word to a direction of the face area designation pad  602  while the touch  10   b  is maintained. 
     Similarly, as depicted in  FIG. 8  ( b ), the controller  180  can control the tag search word such as ‘Young jung Seo’ to be outputted in the face area designation pad  602 . And, the searched result images can be outputted in the search result area  604 . 
     The method of performing a search operation using two tag search words is explained in the embodiment explained with reference to  FIG. 8 . Yet, if an additional tag search word is inputted, it is apparent that the search operation can be performed using more tag search words. 
     Second Search Mode—Face Position Search Mode 
     Meanwhile, one embodiment of the present invention proposes to search for an image based on a face position in the image. In particular, if a user designates a face area on the face area designation pad  602 , the user can search for images whose faces exist in a position corresponding to the designated face area in the images. 
       FIG. 9  is a diagram for a method of searching for an image in accordance with a second search mode according to one embodiment of the present invention. 
     Referring to  FIG. 9  ( a ), the controller  180  receives inputs  10   d  and  11   d  for designating a face area from a user. If the inputs  10   d  and  11   d  for designating the face area are received, the controller  180  searches for images based on the designated face area and can output the searched result images in the search result area  604 . 
     In this case, the inputs  10   d  and  11   d  for designating the face area may correspond to inputs forming a looped curve in a manner of touching  10   d  a specific point and dragging while the touch  10   d  is maintained. 
     In  FIG. 9  ( b ), the controller  180  displays a face area  901  designated by the inputs  10   d  and  11   d  designating the face area. The designated face area  901  may indicate a relative position in which a face exists among a whole area of the face area designation pad  602 . Hence, if the face area is designated, the controller  180  can search for images in which faces exist in an area of the images corresponding to the designated face area  901  among a plurality of images to be searched. In particular, in other word, the controller  180  can search for images including faces, which exist at a position identical to the designated face area  901 . Hence, an image can be searched according to a position in which a face is arranged in the image. The method of searching for an image based on a face position shall be described in detail with reference to  FIG. 10  in the following. 
       FIG. 10  is a diagram for an example of a method of searching for an image based on a position of a face according to one embodiment of the present invention. 
       FIG. 10  ( a ) shows the face area designation pad  602 . Similar to  FIG. 9 , assume that a face area  901  is designated in an identical position on the face area designation pad  602 . In embodiment of  FIG. 10 , the face area designation pad  602  is divided by 4 in a horizontal orientation and divided by 4 in a vertical orientation. The face area designation pad is explained in a manner of being divided into 1 to 4 in the horizontal orientation and being divided into A to D in the vertical orientation. By doing so, the face area designation pad  602  depicted in  FIG. 10  ( a ) can be divided into total 16 areas and the designated face area  901  can be positioned at a B2 area. 
     The controller  180  searches for images including a face in an area B2 corresponding to the designated face area  901 .  FIG. 10  ( b ) is a diagram for an example of search result. In particular, the controller  180  can identically divide the images into 16 areas. The controller searches for images including a face in the B2 area and can provide a search result. 
       FIG. 10  ( b ) shows an example of the image search result of  FIG. 10  ( a ). The image search result includes search results of  902 - 1  to  902 - 4 . Referring to the example of the search result images depicted in  FIG. 10  ( b ), a face exists in the B2 area. 
     In particular, when a user intends to search for a preferred image, the user can search for the preferred image in a manner of recalling a position of a face existing in the preferred image and using the position of the face. 
     Meanwhile, according to the example mentioned earlier in  FIG. 10 , an image is searched in a manner of dividing the face area designation pad  602  into 16 areas, by which the present invention may be non-limited. It is apparent that the image search operation can be performed in a manner of dividing the face area designation pad into more areas (or less areas). 
     Meanwhile, although  FIG. 9  and  FIG. 10  shows examples of a single face area, an identical search operation can be performed based on a plurality of face areas. Regarding this, it shall be described with reference to  FIG. 11  in the following. 
       FIG. 11  is a diagram for a method of searching for an image via a plurality of face areas in a second search mode according to one embodiment of the present invention. 
     Similar to  FIG. 9 , in  FIG. 11  ( a ), assume that the controller  180  receives inputs  10   e  and  11   e  for designating face areas in a state that a face area  901  is designated. In explaining in associated with  FIG. 11 , the face area  901 , which is already designated, is called a first face area and a newly designated face area  1101  is called a second face area. 
       FIG. 11  ( b ) shows that the first face area  901  and the second face area  1101  are outputted in the face area designation pad  602 . The controller  180  can search for images based on the first face area  901  and the second face area  1101 . In particular, the controller  180  can search for images including faces in areas, which correspond to the first face area  901  and the second face area  1101 , respectively. 
       FIG. 12  is a diagram for a method of searching for an image in accordance with a second search mode according to one embodiment of the present invention. The image search method to be described in  FIG. 12  is different from the method mentioned earlier in  FIG. 9  in designating a face area. 
     Referring to  FIG. 12  ( a ), the controller  180  outputs the face area designation pad  602  and the face area designation pad  602  is divided into 16 areas. For clarity, the 16 areas of the face area designation pad  602  are distinguished from each other in a manner of being displayed by number 1 to 16 (‘area 1’ to ‘area 16’). 
     If an input  10   h  for selecting a prescribed area from the face area designation pad  602 , which is divided into a plurality of areas, is received, the controller  180  can designate the selected area as a face area (refer to  FIG. 12  ( b )). In this case, the input  10   h  for selecting the prescribed area may correspond to a press input inputted to an area intended to be selected. 
       FIG. 12  ( b ) shows a case that an ‘area 1’ has been selected. According to one embodiment of the present invention, if a specific area is selected, the controller  180  can distinctively display the selected area to distinguish the selected area from areas not selected. For instance, an indicator  1201  indicating the selected area can be outputted in the selected area. 
     As depicted in  FIG. 12  ( a ), if an area is selected, the controller  180  can search for images including faces in an area corresponding to the selected area (designated face area). In particular, similar to the face area designation pad, in case of diving the images into 16 areas, the controller  180  can search for images including a recognized face in the ‘area 1’. 
     The method of searching for an image by designating a face area is identical to what is mentioned with reference to  FIG. 10 . 
       FIG. 13  is a diagram for a first example of a method of searching for an image in accordance with a third search mode according to one embodiment of the present invention. The third search mode corresponds to a search method in which the first search mode and the second search mode are combined with each other. The third search mode enables an image including a specific person in a specific position of the image to be searched. 
     In  FIG. 13  ( a ), assume that a face area  901  is designated on the face area designation pad  602 . Similar to  FIG. 9  ( b ), the controller  180  can output a plurality of search results  902 - 1  to  902 - 4  in the search result area  604  based on the designated face area  901 . In this case, if inputs  10   f  and  11   f  for matching a specific tag search word  701 - 1  with the face area  901  is received, the controller  180  can search for images including a face of a person corresponding to the specific tag search word  701 - 1  in an area of the images corresponding to the designated face area  901  among a plurality of images to be searched. 
     In this case, the inputs  10   f  and  11   f  for matching the specific tag search word  701 - 1  with the face area  901  may correspond to inputs for touching  10   f  the tag search word  701 - 1  and the inputs which are released after dragging it to a position of the face area  901  while the touching  10   f  is maintained. 
     Referring to  FIG. 13  ( b ), the controller  180  can indicates that the specific search word  701 - 1  is matched with the face area  901  in a manner of outputting the specific tag search word  701 - 1 , which is matched inside of the face area  901 , on the face area designation pad  602 . 
     And, the controller  180  can output result images in the search result area  604  according to the result of the searching. Referring to the search results depicted in  FIG. 13  ( b ), it is able to check that a  901 - 1  and  901 - 2  image, which correspond to a result of excluding a part of images from the search results of  FIG. 13  ( a ), are outputted only. The  902 - 1  and  902 - 2  image correspond to pictures including such a specific person as ‘Eunhee Ahn’ in an area of the images corresponding to the face area  901 . 
       FIG. 14  is a diagram for a second example of a method of searching for an image in accordance with a third search mode according to one embodiment of the present invention.  FIG. 14  shows a method of inputting an additional search condition to the search condition described in  FIG. 13 . 
     Assume that such a tag search word  701 - 1  as ‘Eunhee Ahn’ is matched with the face area  901  in  FIG. 14  ( a ) similar to  FIG. 13  ( b ). In explanation in associated with  FIG. 14 , the face area  901  is called a first face area and a face area to be additionally inputted is called a second face area. 
     In a state of  FIG. 14  ( a ), if inputs  10   k  and  11   k  for additionally designating a face area is received, the controller  180  can search for images based on the first face area  901 , the tag search word  701 - 1  and the second face area  1401 . First of all, a method of searching for images based on the first face area  901  and the tag search word  701 - 1  may be identical to what is explained with reference to  FIGS. 13  ( a ) and ( b ). The controller  180  can further search for (filter) images including a face in an area corresponding to the second face area  1401  among the searched result images of  FIG. 13 . 
     By doing so, in case that a user remembers a face of a specific person in the first area and does not clearly remember a person in the second area, the user can search for an image including a face of a random person existing in the second area. 
       FIG. 15  is a diagram for a third example of a method of searching for an image in accordance with a third search mode according to one embodiment of the present invention. 
     In  FIG. 15 , similar to  FIG. 10 , the face area designation pad  602  is divided by 4 in a horizontal orientation and divided by 4 in a vertical orientation. The face area designation pad is explained in a manner of being divided into 1 to 4 in the horizontal orientation and being divided into A to D in the vertical orientation. Similarly, it is apparent that a search can be performed in a manner of diving the face area designation pad into more areas in  FIG. 15 . 
     In  FIG. 15  ( a ), a face area  901  exists in a B2 area and such a tag search word  701 - 2  as ‘Young jung Seo’ is matched with the first face area  901 . The controller  180  can configure whether a face of such a person as ‘Young jung Seo’ is positioned at the B2 area among images to be searched as a first search condition. 
     In  FIG. 15  ( a ), assume that such a tag search word as ‘Eunhee Ahn’  701 - 1  is selected as an additional search condition. The controller  180  can output the selected tag search word such as ‘Eunhee Ahn’ in the face area designation pad  602 . Then, the controller  180  can configure whether a face of such a person as ‘Eunhee Ahn’ is included (position of the face in the image is irrelevant) in the images to be searched as a second search condition. 
     The controller  180  performs an image search operation based on the aforementioned first search condition and the second search condition and can control a searched result to be outputted (refer to  FIG. 15  ( b )). 
     In particular, according to embodiment explained in  FIG. 15 , an image simultaneously including a face of such a specific person as ‘Young jung Seo’ existing in a position of the image corresponding to the face area  901  and a face of such a person as ‘Eunhee Ahn’ can be searched. Referring to an example of an image depicted in  FIG. 15  ( b ), the face of the person such as ‘Young jung Seo’ is positioned at the B2 area in the image and it is able to check that the face of the person such as ‘Eunhee Ahn’ is included in the image as well. And, the face of the person such as ‘Eunhee Ahn’ is irrelevant to a position. 
       FIG. 16  is a diagram for an example of a method of changing a position between designated face areas according to one embodiment of the present invention. 
     Referring to  FIG. 16  ( a ), such a tag search word  701 - 1  as ‘Eunhee Ahn’ is matched with a first face area  901  and such a tag search word  701 - 2  as ‘Young jung Seo’ is matched with a second face area  1401 . In this case, if inputs  10   g  and  11   g  for changing a position between the first face area  901  and the second face area  1401  are received, as depicted in  FIG. 16  ( b ), the controller  180  can replace the position of the first face area  901  with the position of the second face area  1401 . Then, the controller  180  can perform an image search operation based on the changed positions of the first face area and the second face area. 
       FIG. 17  to  FIG. 19  are diagrams for a fourth example of a method of searching for an image in accordance with a third search mode according to one embodiment of the present invention. 
       FIG. 17  ( a ) shows a case that an ‘area 6’ and an ‘area 7’ are selected. Selecting an area and searching based on a selected area are identical to the second search mode which is mentioned earlier with reference to  FIG. 12 . Hence, the controller  180  searches for images including a face in areas corresponding to the selected areas (area 6 and area 7) among images to be searched and may be then able to output a search result in the search result area  604  as depicted in  FIG. 17  ( a ). Images  1601 - 1  to  1601 - 4  are outputted in the search result area  604  shown in  FIG. 17  ( a ) as the search result. 
     In this situation, if inputs  10   i ,  11   i ,  10   j  and  11   j  for respectively matching such a tag search word  701 - 1  as ‘Eunhee Ahn’ and such a tag search word  701 - 2  as ‘Young jung Seo’ with the ‘area 6’ and the ‘area 7’ are received, the controller  180  can display the tag search word  701 - 1  such as ‘Eunhee Ahn’ in the ‘area 6’ and can display the tag search word  701 - 2  such as ‘Young jung Seo’ in the ‘area 7’. And, the controller  180  can search for images including a face of such a person as ‘Eunhee Ahn’ in the ‘area 6’ and images including a face of such a person as ‘Young jung Seo’ in the ‘area 7’. And, as depicted in  FIG. 17  ( b ), the controller can display a search result in the search result area 604. As depicted in  FIG. 17  ( b ), an image  1601 - 1  is outputted in the search result area 604 as the search result. 
     Assume that the ‘area 6’ is selected in  FIG. 18  ( a ) and the tag search word  701 - 1  such as ‘Eunhee Ahn’ is matched with the selected ‘area 6’. In addition, assume that the tag search word  701 - 2  such as ‘Young jung Seo’ is selected as a search condition. 
     In this case, since the tag search word  701 - 1  such as ‘Eunhee Ahn’ is matched with the ‘area 6’, whether there exists a face of such a person as ‘Eunhee Ahn’ in the ‘area 6’ corresponds to a search condition in searching for images (first search condition in the explanation on  FIG. 18 ). 
     Since the tag search word  701 - 2  such as ‘Young jung Seo’ is not matched with any area, whether there exists a face of such a person as ‘Young jung Seo’ corresponds to a search condition irrespective of an area (position) on an image (second search condition in the explanation on  FIG. 18 ). 
     By doing so, the controller  180  can search for images satisfying both the first search condition and the second search condition (refer to  FIG. 18  ( b )). 
     Assume that a face area  1901  is designated and the tag search word  701 - 1  such as ‘Eunhee Ahn’ and the tag search word  701 - 2  such as ‘Young jung Seo’ are selected as a search condition irrespective of the designated face area in  FIG. 19  ( a ). 
     In this case, a first search condition may correspond to whether a face exists in an ‘area 3’ and an area 7’ (not necessarily be a specific person). And, a second search condition may correspond to whether there exist a face of such a person as ‘Eunhee Ahn’ and a face of such a person as ‘Young jung Seo’ irrespective of a position. The controller  180  can search for images based on the first and the second search condition. 
       FIG. 19  ( b ) shows an example of an image according to the aforementioned search result. The image shown in the example includes the face of the person such as ‘Eunhee Ahn’ and the face of the person such as ‘Young jung Seo’ (irrespective of a position) and includes faces recognized in the ‘area 3’ and the ‘area 7’ on the image area (refer to  501 - 5 ). 
       FIG. 20  is a diagram for a first example of a method of searching for an image in accordance with a fourth search mode according to one embodiment of the present invention. 
     The fourth search mode corresponds to a method of searching for images based on the number of persons included in the images. More specifically, the fourth search mode corresponds to the method of searching for images based on the number of faces recognized in the images. 
       FIG. 20  ( a ) shows a state according to one embodiment of the present invention and the number of persons input icon  601 - 1  is outputted in the drawing tool area  601 . If an input  10   r  for selecting the number of persons input icon  601 - 1  is received, the controller  180  can output a pop-up window  2001  for inputting the number of persons. If the number of persons is inputted  10   s  via the pop-up window  2001 , the controller  180  can perform an image search based on the inputted number of persons. And, the controller  180  can display  2002  the inputted number of persons and can also output a guide pop-up window  2003  guiding that the image search is performed based on the corresponding number of persons. Then, the controller  180  can output searched result images in the search result area  604 . 
       FIG. 21  is a diagram for a second example of a method of searching for an image in accordance with a fourth search mode according to one embodiment of the present invention. 
     Similar to the first example of  FIG. 20 , the image search is performed based on the number of persons in the second example. Yet, the image search in the second example can be performed based on images including a specific person among persons included in the number of persons. 
     Referring to  FIG. 21 , such a tag search word  701 - 1  as ‘Eunhee Ahn’ is selected as a search condition. In this case, if an input for selecting the number of persons input icon  601 - 1  is received, the controller  180  can output a pop-up window  2001  for inputting the number of persons. If the number of persons is inputted  10   s  via the pop-up window  2001 , the controller  180  can perform an image search based on the inputted number of persons together with the selected tag search word. 
     In particular, the controller  180  includes such a person as ‘Eunhee Ahn’ among the images to be searched and can search for the images including persons as many as the inputted number of persons. 
     And, the controller  180  can display  2002  the inputted number of persons and can also output a guide pop-up window  2003  guiding that the image search is performed based on the corresponding number of persons. Then, the controller  180  can output searched result images in the search result area  604 . 
     Meanwhile, in case of a group picture, although it is not able to precisely know how many persons are included in the group picture, there may exist a case that faces of several persons are captured in a manner of being cornered in a specific position. Hence, one embodiment of the present invention intends to propose a method of searching for such an image as the group picture mentioned above. Regarding this, it shall be described with reference to  FIG. 22  in the following. 
       FIG. 22  and  FIG. 23  are diagrams for a method of searching for a group picture according to one embodiment of the present invention. 
       FIG. 22  ( a ) shows a state according to one embodiment of the present invention and a group picture area icon  601 - 2  is outputted in the drawing tool area  601 . 
     After the group picture area icon  601 - 2  is selected  10   t , if an input  10   u  for designating an area is received, the controller  180  can perform an image search based on a designated area  2101 . 
       FIG. 23  ( a ) shows the designated area  2101  together with the face area designation pad  602  and  FIG. 23  ( b ) shows search result images of  FIG. 23  ( a ). In performing a search, the controller  180  can search for an image including a plurality of recognized faces in the designated area  2101 . Referring to  FIG. 23  ( b ), the faces  501 - 6  to  501 - 11  of a plurality of persons are included in the designated area  2101 . In addition, the controller  180  can exclude images including a face recognized at the outside of the designated area  2101  from the search result. In particular, the controller  180  can control the image including the faces recognized in the designated area  2101  to be searched only. 
     Then, the controller  180  can output the searched result in the search result area  604 . 
     Meanwhile, according to the embodiment explained with reference to  FIG. 22 , a search operation is performed irrespective of the number of recognized faces included in the designated area. Yet, according to a different embodiment of the present invention, the search operation can be performed in a manner of designating the number of recognized faces included in the designated area. Regarding this embodiment, it shall be described with reference to  FIG. 24  in the following. 
       FIG. 24  is a diagram for a method of designating an area and a method of performing an image search by designating the number of persons in the designated area according to one embodiment of the present invention. 
       FIG. 24  ( a ) shows a search state according to one embodiment of the present invention. Similar to  FIG. 22 , assume that there exists a designated area  2101 . In this case, if an input for selecting the number of persons input icon  601 - 1  is received  10   r , the controller  180  can output a pop-up window  2001  for inputting the number of persons. If the number of persons is inputted  10   v  via the pop-up window  2001 , the controller  180  can perform an image search based on the designated area  2101  and the inputted number of persons. In particular, the controller  180  can search for images including the inputted number of persons in the designated area  2101  among images to be searched. 
     And, the controller  180  can output a guide pop-up window  2101  guiding that the image search is performed based on the designated number of persons. Then, the controller  180  can control search result images to be outputted in the search result area  604 . 
     The embodiments of the present invention, which have been explained so far, correspond to methods of searching for images in a manner of identifying a specific person via face recognition. Moreover, according to a different embodiment, images can be categorized by a specific person via face recognition. Regarding this, it shall be described with reference to  FIG. 25  in the following. 
       FIG. 25  is a diagram for a method of searching for an image in accordance with a fifth search mode according to one embodiment of the present invention. 
     Referring to  FIG. 25  ( a ), the controller  180  outputs images in a manner of categorizing the images according to a person. For instance, images including such a person as ‘Eunhee Ahn’ are outputted in  2501 - 1  area only. In particular, the controller  180  searches for pictures including the person such as ‘Eunhee Ahn’ via face recognition and can control searched result to be outputted in the  2501 - 1  area. The aforementioned method can be identically applied to the rest of areas  2501 - 2  to  2501 - 4 . 
     A list of persons outputted in  FIG. 25  ( a ) can be configured in an order of a most recently used tag search word, a most frequently included person in images, a most frequently used tag search word or the like. And, a list including more persons can be displayed via a scroll operation. 
     If an input  10   w  for selecting a specific person is received, the controller  180  can display images including the specific person only as depicted in  FIG. 25  ( b ). 
     So far, various methods for performing an image search have been introduced. According to the aforementioned methods, a result of the image search may have an output of a single image, no image depending on a search condition, or a plurality of images. 
     In the following description, if a plurality of images are outputted as a result of the image search, a method of utilizing the search result is explained with reference to  FIG. 26  in the following embodiment. 
       FIG. 26  is a diagram for a method of utilizing a search result according to one embodiment of the present invention. 
     Referring to  FIG. 26  ( a ) to ( c ), a home screen is outputted via the touch screen  151  of the mobile terminal  100 . The home screen is explained in more detail. 
     In general, the home screen can be defined as a screen firstly displayed in the touch screen  151  when a lock of the touch screen is cancelled. At least one icon to execute an application or an internal function or a widget can be displayed in the home screen. Two or more home screens may exist in the mobile terminal. In this case, the two or more home screens can be sequentially displayed one by one when a prescribed touch gesture is put on the touch screen  151 . Each of the home screens may have icons (widgets) different from each other. 
     If a plurality of images are searched by the aforementioned methods, one embodiment of the present invention proposes to sequentially output a plurality of the searched images via picture slide widgets  2601 - 1  to  2601 - 3  on the home screen. 
     Referring to  FIG. 26  ( a ) to ( c ), the controller  180  outputs picture slide widgets  2601 - 1  to  2601 - 3 . The picture slide widgets  2601 - 1  to  2601 - 3  display an image slide with a prescribed interval. The image slide may correspond to search result images according to one embodiment of the present invention. 
     Meanwhile, a search method according to one embodiment of the present invention can be efficiently used in case of performing an operation of combining several pictures with each other. 
       FIG. 27  is a diagram for a method of utilizing a search method according to one embodiment of the present invention. 
     Referring to  FIG. 27  ( a ), the controller  180  outputs a plurality of image composition frames  2701 - 1  to  2701 - 6  via the touch screen  151 . 
     The image composition frame indicates a frame used for composing a plurality images into one image. One image is selected and the image can be inserted into each of a plurality of areas (A to D area in  FIG. 27 ) included in the image composition frame. 
     If an input for selecting one of a plurality of the image composition frames  2701 - 1  to  2701 - 6  is received, as depicted in  FIG. 27  ( b ), the controller  180  can output a tag search word list  603  and a search result area  604  together with the selected image composition frame  2701 - 1 . 
     If a specific tag search word is inputted in a specific area of the image composition frame, the controller  180  can perform a search operation based on the inputted tag search word to search for an image to be inserted to the specific area. Referring to an example shown in  FIG. 27  ( b ), when the image search operation is performed to insert an image into an ‘area A’ of the selected image composition frame  2701 - 1 , if such a tag search word  701 - 1  as ‘Eunhee Ahn’ is inputted in the ‘area A’, the controller  180  can output image search result including such a person as ‘Eunhee Ahn’. 
     Moreover, one embodiment of the present invention proposes to perform an image search in a manner of further considering a position of a specific area in an image composition frame. Referring to the example of  FIG. 27  ( b ), since the ‘area A’ corresponds to an area leaning to the left on the basis of the whole of the image composition frame, pictures including such a person as ‘Eunhee Ahn’ in a left area of the pictures may be suitable for an image to be inserted into the ‘area A’. Hence, in case of searching for the image to be inserted into the ‘area A’, the controller  180  searches for the pictures including the person such as ‘Eunhee Ahn’ in the left area ( 2702  in  FIG. 27  ( c )) of the pictures and can control the searched result to be outputted in the search result area  604 . 
     Meanwhile, embodiments of the present invention can be applied to not only face recognition of a person but also recognition of an object. A method of searching for images via object recognition is proposed in  FIG. 28 . 
       FIG. 28  is a diagram for a method of searching for an image via object recognition according to one embodiment of the present invention. 
       FIG. 28  ( a ) shows an object area designation pad  2802  according to one embodiment of the present invention. The object area designation pad  2802  is an area corresponding to the aforementioned face area designation pad  602 . The object area designation pad indicates a pad used for receiving an input corresponding to an area at which a specific object is positioned from a user. 
     If an input for designating a prescribed area  2801  is received from the user, the controller  180  can search for images including a specific object in the prescribed area  2801 . Referring to an example of  FIG. 28 , the controller searches for images including flowers in the prescribed area  2801 . 
     According to embodiments of the present invention, a face of a specific person can be matched with contact informations via face recognition and identification. In addition, in case of sharing an image using the matched contact informations, a different embodiment of the present invention proposes a method of directly transmitting the image to the specific person. 
       FIG. 29  is a diagram for a method of easily sharing an image based on face recognition according to one embodiment of the present invention. 
     Referring to an image shown in  FIG. 29  ( a ), a face of such a person as ‘Eunhee Ahn’ and a face of such a person as ‘Young jung Seo’ are recognized. if an input  10   x  for selecting the person such as ‘Eunhee Ahn’ is received, the controller  180  can output a sharing selection pop-up window  2901 . The sharing selection pop-up window  2901  indicates a pop-up window used for selecting one sharing means from a list of at least one sharing means. Referring to  FIG. 29  ( b ), ‘text message’, ‘Kakao Talk’, ‘e-mail’ and ‘Mypeople’ are outputted in the sharing selection pop-up window  2901  as the sharing means. If one means is selected from the sharing selection pop-up window  2901 , the controller  180  performs sharing using the selected sharing means and can directly transmit the image to the person such as ‘Eunhee Ahn’ using information stored in the contact of the person such as ‘Eunhee Ahn’. 
       FIG. 30  is a flowchart for a method of searching for an image based on face recognition according to one embodiment of the present invention. 
     In the step S 2801 , the controller  180  may enter a picture search mode. In case of entering the picture search mode, as depicted in  FIG. 6 , the controller  180  can output (activate) the face area designation pad  602  (drawing pad) [S 2802 ]. 
     In the step S 2803 , the controller  180  can output the tag search word list  603  including at least one tag search word. 
     In the step S 2804 , the controller  180  determines whether an input for designating a face area is received on the face area designation pad  602 . If there is a designation of the face area, the controller can proceed with the step S 2807 . Otherwise, the controller can proceed with the step S 2805 . 
     In the step S 2805 , the controller  180  determines whether an input for selecting at least one tag search word from the tag search word list  603  is received. If the input for selecting the tag search word is not received, the controller  180  may end the flowchart. If the input for selecting the tag search word is received, the controller  180  can proceed with the step S 2806 . 
     In the step S 2806 , the controller  180  can perform a search operation based on the selected tag search word. In the step S 2806 , a search mode performed by the controller  180  may correspond to the aforementioned tag search mode. In particular, the controller  180  can search for an image including a corresponding person irrespective of a face position of the person (a person corresponding to the selected tag search word) included in the image. And, the controller  180  proceeds with the step S 2801 , outputs a searched result picture and may be then able to end the flowchart. 
     In the step S 2807 , the controller  180  determines whether an input for selecting at least one tag search word from the tag search word list  603  is received. If the input for selecting the tag search word is not received, the controller  180  can proceed with the S 2809 . If the input for selecting the tag search word is received, the controller  180  can proceed with the S 2808 . 
     In the step S 2808 , the controller  180  can perform a search operation based on a designated face area and the selected tag search word. The search operation in the step S 2808  may correspond to the aforementioned face position and the tag search mode. In particular, the controller  180  can search for an image including a specific person (a person corresponding to the selected tag search word) in the designated face area. And, the controller  180  proceeds with the step S 2801 , outputs a searched result picture and may be then able to end the flowchart. 
     In the step S 2809 , the controller  180  can perform a search operation based on the designated face area. The search operation in the step S 2809  may correspond to the aforementioned face position search mode. In particular, the controller  180  can search for an image including a face of a random person in the designated face area. And, the controller  180  proceeds with the step S 2801 , outputs a searched result picture and may be then able to end the flowchart. 
     Advantages and effectiveness of a mobile terminal according to the present invention and a method of controlling therefor are explained in the following. 
     According to at least one of embodiments of the present invention, it is able to provide a user with a user interface enabling the user to easily and conveniently search for an image data preferred by the user among many numbers of stored image data. 
     It will be apparent to those skilled in the art that the present invention can be specified into other form(s) without departing from the spirit or scope of the inventions. 
     The above-described methods can be implemented in a program recorded medium as computer-readable codes. The computer-readable media include all kinds of recording devices in which data readable by a computer system are stored. The computer-readable media include ROM, RAM, CD-ROM, magnetic tapes, floppy discs, optical data storage devices, and the like for example and also include carrier-wave type implementations (e.g., transmission via Internet). And, the computer can include the control unit  180  of the terminal. 
     It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. Thus, it is intended that the present invention covers the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.