Patent Publication Number: US-2021192858-A1

Title: Electronic device for generating image including 3d avatar reflecting face motion through 3d avatar corresponding to face and method of operating same

Description:
CROSS-REFERENCE TO RELATED APPLICATION(S) 
     This application is a continuation application of prior application Ser. No. 16/281,561, filed on Feb. 21, 2019, which application is based on and claims priority under 35 U.S.C. § 119(a) of a Korean patent application number 10-2018-0022262, filed on Feb. 23, 2018, in the Korean Intellectual Property Office, the disclosure of which is incorporated by reference herein in its entirety. 
    
    
     BACKGROUND 
     1. Field 
     The disclosure relates to an electronic device for generating an image including a three-dimensional (3D) avatar reflecting the motion of a face through a 3D avatar of the face and a method of operating the same. 
     2. Description of Related Art 
     An electronic device may provide various services that use an avatar. The electronic device may use a 3D avatar of a user in order to display the user&#39;s emotion or intent in various applications. 
     The electronic device may provide a function of generating an avatar of the user and allow the user to create his/her own avatar. 
     The above information is presented as background information only to assist with an understanding of the disclosure. No determination has been made, and no assertion is made, as to whether any of the above might be applicable as prior art with regard to the disclosure. 
     SUMMARY 
     Aspects of the disclosure are to address at least the above-mentioned problems and/or disadvantages and to provide at least the advantages described below. Accordingly, an aspect of the disclosure is to provide an electronic device and a method for the same capable of providing a three-dimensional (3D) avatar based on a two-dimensional (2D) image including an object corresponding to a face. 
     According to various embodiments, an electronic device may generate and provide a 3D avatar of a user based on attributes related to a user&#39;s face. 
     According to various embodiments, an electronic device may generate and provide a 2D image including an object to which an avatar&#39;s facial expression, an avatar&#39;s gesture, a background, or an animation effect are variously applied using a 3D avatar generated based on a 2D image including a user. 
     Additional aspects will be set forth in part in the description which follows and, in part, will be apparent from the description, or may be learned by practice of the presented embodiments. 
     In accordance with an aspect of the disclosure, an electronic device is provided. The electronic device includes a camera, a display, and a processor configured to obtain a first image including one or more external objects by using the camera, display to output a three-dimensional (3D) object generated based on attributes related to a face among the one or more external objects using the display, generate a 3D avatar for the face based on at least one graphic attribute from among a plurality of graphic attributes which can be applied to the 3D object, and generate a second image including at least one object reflecting a predetermined facial expression or motion using the 3D avatar. 
     In accordance with another aspect of the disclosure, an electronic device is provided. The electronic device includes a camera, and a processor configured to obtain a first image including one or more external objects using the camera, identify a face included in the one or more external objects, select a three-dimensional (3D) avatar among one or more 3D avatars based on the face, generate a 3D object using the 3D avatar reflecting a facial expression corresponding to the face, and generate a second image including the 3D object. 
     In accordance with another aspect of the disclosure, an electronic device is provided. The electronic device includes a camera, and a processor configured to obtain a first image including one or more external objects by using the camera, determine whether a face is included in the one or more external objects, when the face is included in the one or more external objects, generate a three-dimensional (3D) avatar based on attributes corresponding to the face, and when the face is not included in the one or more external objects, block generating of a 3D avatar. 
     An electronic device, according to various embodiments, can provide a 3D avatar corresponding to an external object included in a 2D image obtained using a camera. 
     An electronic device, according to various embodiments, can provide a 2D image including an object generated using a 3D avatar reflecting a facial expression of the avatar, a gesture of the avatar, a background, or an animation effect. 
     An electronic device, according to various embodiments, can provide one or more applications using a 3D avatar generated based on a 2D image including a user&#39;s face. 
     Other aspects, advantages, and salient features of the disclosure will become apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses various embodiments of the disclosure. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above and other aspects, features, and advantages of certain embodiments of the disclosure will be more apparent from the following description taken in conjunction with the accompanying drawings, in which: 
         FIG. 1  is a block diagram illustrating an electronic device within a network environment according to various embodiments of the disclosure; 
         FIG. 2  is a flowchart illustrating a method of operating an electronic device which generates a three-dimensional (3D) avatar according to various embodiments of the disclosure; 
         FIGS. 3A, 3B, 3C, 3D, 3E, and 3F  illustrate an operation in which an electronic device generates a 3D avatar provided to a user according to various embodiments of the disclosure; 
         FIGS. 4A, 4B, and 4C  illustrate a 3D graphic object generated by an electronic device and graphic attributes which can be applied to the 3D graphic object according to various embodiments of the disclosure; 
         FIG. 5  illustrates an operation in which an electronic device generates a 3D avatar based on a two-dimensional (2D) image according to various embodiments of the disclosure; 
         FIG. 6  illustrates a 2D image including at least one object generated using a 3D avatar by an electronic device according to various embodiments of the disclosure; 
         FIG. 7  illustrates editing a photo using an avatar character by an electronic device according to various embodiments of the disclosure; 
         FIG. 8  illustrates transmitting a selected object of an avatar character through a message by an electronic device according to various embodiments of the disclosure; 
         FIG. 9  illustrates editing contacts to include an avatar character by an electronic device according to various embodiments of the disclosure; 
         FIG. 10  illustrates a 3D avatar generated based on a 2D image including an animal head by an electronic device according to various embodiments of the disclosure; 
         FIG. 11  illustrates a 3D avatar generated based on a 2D image including a character by an electronic device according to various embodiments of the disclosure; 
         FIG. 12  illustrates a 3D avatar generated based on a 2D image including an accessory by an electronic device according to various embodiments of the disclosure; 
         FIGS. 13 and 14  illustrate expression attributes related to a face according to various embodiments of the disclosure; 
         FIG. 15  illustrates a 3D avatar generated using various 3D templates by an electronic device according to various embodiments of the disclosure; 
         FIGS. 16 and 17  illustrate attributes related to a 3D graphic object generated based on a 2D image by an electronic device according to various embodiments of the disclosure; 
         FIG. 18  illustrates a 3D avatar generated based on a 2D image including an external object corresponding to a face and an additional object by an electronic device according to various embodiments of the disclosure; 
         FIGS. 19A and 19B  illustrate an operation in which an electronic device generates an image including a plurality of 3D avatars according to various embodiments of the disclosure; 
         FIG. 20  illustrates expression attributes of a 3D avatar according to various embodiments of the disclosure; 
         FIGS. 21A, 21B, 21C, 21D, and 21E  illustrate an operation in which an electronic device generates a 3D avatar in a video call function according to various embodiments of the disclosure; and 
         FIG. 22  illustrates an operation in which an electronic device shares a 3D avatar with an electronic device of a video call counterpart according to various embodiments of the disclosure. 
     
    
    
     Throughout the drawings, like reference numerals will be understood to refer to like parts, components, and structures. 
     DETAILED DESCRIPTION 
     The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of various embodiments of the disclosure as defined by the claims and their equivalents. It includes various specific details to assist in that understanding but these are to be regarded as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the various embodiments described herein can be made without departing from the scope and spirit of the disclosure. In addition, descriptions of well-known functions and constructions may be omitted for clarity and conciseness. 
     The terms and words used in the following description and claims are not limited to the bibliographical meanings, but, are merely used by the inventor to enable a clear and consistent understanding of the disclosure. Accordingly, it should be apparent to those skilled in the art that the following description of various embodiments of the disclosure is provided for illustration purpose only and not for the purpose of limiting the disclosure as defined by the appended claims and their equivalents. 
     It is to be understood that the singular forms “a,” “an,” and “the” include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to “a component surface” includes reference to one or more of such surfaces. 
       FIG. 1  is a block diagram illustrating an electronic device in a network environment according to various embodiments of the disclosure. 
     Referring to  FIG. 1 , the electronic device  101  in the network environment  100  may communicate with an external electronic device  102  via a first network  198  (e.g., a short-range wireless communication network), or an external electronic device  104  or a server  108  via a second network  199  (e.g., a long-range wireless communication network). According to an embodiment, the electronic device  101  may communicate with the external electronic device  104  via the server  108 . According to an embodiment, the electronic device  101  may include a processor  120 , memory  130 , an input device  150 , a sound output device  155 , a display device  160 , an audio module  170 , a sensor module  176 , an interface  177 , a haptic module  179 , a camera module  180 , a power management module  188 , a battery  189 , a communication module  190 , a subscriber identification module (SIM)  196 , or an antenna module  197 . In some embodiments, at least one (e.g., the display device  160  or the camera module  180 ) of the components may be omitted from the electronic device  101 , or one or more other components may be added in the electronic device  101 . In some embodiments, some of the components may be implemented as single integrated circuitry. For example, the sensor module  176  (e.g., a fingerprint sensor, an iris sensor, or an illuminance sensor) may be implemented as embedded in the display device  160  (e.g., a display). 
     The processor  120  may execute, for example, software (e.g., a program  140 ) to control at least one other component (e.g., a hardware or software component) of the electronic device  101  coupled with the processor  120 , and may perform various data processing or computation. According to one embodiment, as at least part of the data processing or computation, the processor  120  may load a command or data received from another component (e.g., the sensor module  176  or the communication module  190 ) in volatile memory  132 , process the command or the data stored in the volatile memory  132 , and store resulting data in non-volatile memory  134 , which can include an internal memory  136  and an external memory  138 . According to an embodiment, the processor  120  may include a main processor  121  (e.g., a central processing unit (CPU) or an application processor (AP)), and an auxiliary processor  123  (e.g., a graphics processing unit (GPU), an image signal processor (ISP), a sensor hub processor, or a communication processor (CP)) that is operable independently from, or in conjunction with, the main processor  121 . Additionally or alternatively, the auxiliary processor  123  may be adapted to consume less power than the main processor  121 , or to be specific to a specified function. The auxiliary processor  123  may be implemented as separate from, or as part of the main processor  121 . 
     The auxiliary processor  123  may control at least some of functions or states related to at least one component (e.g., the display device  160 , the sensor module  176 , or the communication module  190 ) among the components of the electronic device  101 , instead of the main processor  121  while the main processor  121  is in an inactive (e.g., sleep) state, or together with the main processor  121  while the main processor  121  is in an active state (e.g., executing an application). According to an embodiment, the auxiliary processor  123  (e.g., an ISP or a CP) may be implemented as part of another component (e.g., the camera module  180  or the communication module  190 ) functionally related to the auxiliary processor  123 . 
     The memory  130  may store various data used by at least one component (e.g., the processor  120  or the sensor module  176 ) of the electronic device  101 . The various data may include, for example, software (e.g., the program  140 ) and input data or output data for a command related thererto. The memory  130  may include the volatile memory  132  or the non-volatile memory  134 . 
     The program  140  may be stored in the memory  130  as software, and may include, for example, an operating system (OS)  142 , middleware  144 , or an application  146 . 
     The input device  150  may receive a command or data to be used by other component (e.g., the processor  120 ) of the electronic device  101 , from the outside (e.g., a user) of the electronic device  101 . The input device  150  may include, for example, a microphone, a mouse, a keyboard, or a digital pen (e.g., a stylus pen). 
     The sound output device  155  may output sound signals to the outside of the electronic device  101 . The sound output device  155  may include, for example, a speaker or a receiver. The speaker may be used for general purposes, such as playing multimedia or playing record, and the receiver may be used for an incoming calls. According to an embodiment, the receiver may be implemented as separate from, or as part of the speaker. 
     The display device  160  may visually provide information to the outside (e.g., a user) of the electronic device  101 . The display device  160  may include, for example, a display, a hologram device, or a projector and control circuitry to control a corresponding one of the display, hologram device, and projector. According to an embodiment, the display device  160  may include touch circuitry adapted to detect a touch, or sensor circuitry (e.g., a pressure sensor) adapted to measure the intensity of force incurred by the touch. 
     The audio module  170  may convert a sound into an electrical signal and vice versa. According to an embodiment, the audio module  170  may obtain the sound via the input device  150 , or output the sound via the sound output device  155  or a headphone of an external electronic device (e.g., an external electronic device  102 ) directly (e.g., wiredly) or wirelessly coupled with the electronic device  101 . 
     The sensor module  176  may detect an operational state (e.g., power or temperature) of the electronic device  101  or an environmental state (e.g., a state of a user) external to the electronic device  101 , and then generate an electrical signal or data value corresponding to the detected state. According to an embodiment, the sensor module  176  may include, for example, a gesture sensor, a gyro sensor, an atmospheric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an infrared (IR) sensor, a biometric sensor, a temperature sensor, a humidity sensor, or an illuminance sensor. 
     The interface  177  may support one or more specified protocols to be used for the electronic device  101  to be coupled with the external electronic device (e.g., the external electronic device  102 ) directly (e.g., wiredly) or wirelessly. According to an embodiment, the interface  177  may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, a secure digital (SD) card interface, or an audio interface. 
     A connection terminal  178  may include a connector via which the electronic device  101  may be physically connected with the external electronic device (e.g., the external electronic device  102 ). According to an embodiment, the connection terminal  178  may include, for example, a HDMI connector, a USB connector, a SD card connector, or an audio connector (e.g., a headphone connector). 
     The haptic module  179  may convert an electrical signal into a mechanical stimulus (e.g., a vibration or a movement) or electrical stimulus which may be recognized by a user via his tactile sensation or kinesthetic sensation. According to an embodiment, the haptic module  179  may include, for example, a motor, a piezoelectric element, or an electric stimulator. 
     The camera module  180  may capture a still image or moving images. According to an embodiment, the camera module  180  may include one or more lenses, image sensors, ISPs, or flashes. 
     The power management module  188  may manage power supplied to the electronic device  101 . According to one embodiment, the power management module  188  may be implemented as at least part of, for example, a power management integrated circuit (PMIC). 
     The battery  189  may supply power to at least one component of the electronic device  101 . According to an embodiment, the battery  189  may include, for example, a primary cell which is not rechargeable, a secondary cell which is rechargeable, or a fuel cell. 
     The communication module  190  may support establishing a direct (e.g., wired) communication channel or a wireless communication channel between the electronic device  101  and the external electronic device (e.g., the external electronic device  102 , the external electronic device  104 , or the server  108 ) and performing communication via the established communication channel. The communication module  190  may include one or more CPs that are operable independently from the processor  120  (e.g., the AP) and supports a direct (e.g., wired) communication or a wireless communication. According to an embodiment, the communication module  190  may include a wireless communication module  192  (e.g., a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module  194  (e.g., a local area network (LAN) communication module or a power line communication (PLC) module). A corresponding one of these communication modules may communicate with the external electronic device via the first network  198  (e.g., a short-range communication network, such as Bluetooth™, wireless-fidelity (Wi-Fi) direct, or IR data association (IrDA)) or the second network  199  (e.g., a long-range communication network, such as a cellular network, the Internet, or a computer network (e.g., LAN or wide area network (WAN)). These various types of communication modules may be implemented as a single component (e.g., a single chip), or may be implemented as multi components (e.g., multi chips) separate from each other. The wireless communication module  192  may identify and authenticate the electronic device  101  in a communication network, such as the first network  198  or the second network  199 , using subscriber information (e.g., international mobile subscriber identity (IMSI)) stored in the SIM  196 . 
     The antenna module  197  may transmit or receive a signal or power to or from the outside (e.g., the external electronic device) of the electronic device  101 . According to an embodiment, the antenna module  197  may include an antenna including a radiating element composed of a conductive material or a conductive pattern formed in or on a substrate (e.g., a printed circuit board (PCB)). According to an embodiment, the antenna module  197  may include a plurality of antennas. In such a case, at least one antenna appropriate for a communication scheme used in the communication network, such as the first network  198  or the second network  199 , may be selected, for example, by the communication module  190  (e.g., the wireless communication module  192 ) from the plurality of antennas. The signal or the power may then be transmitted or received between the communication module  190  and the external electronic device via the selected at least one antenna. According to an embodiment, another component (e.g., a radio frequency integrated circuit (RFIC)) other than the radiating element may be additionally formed as part of the antenna module  197 . 
     At least some of the above-described components may be coupled mutually and communicate signals (e.g., commands or data) therebetween via an inter-peripheral communication scheme (e.g., a bus, general purpose input and output (GPIO), serial peripheral interface (SPI), or mobile industry processor interface (MIPI)). 
     According to an embodiment, commands or data may be transmitted or received between the electronic device  101  and the external electronic device  104  via the server  108  coupled with the second network  199 . Each of the external electronic devices  102  and  104  may be a device of a same type as, or a different type, from the electronic device  101 . According to an embodiment, all or some of operations to be executed at the electronic device  101  may be executed at one or more of the external electronic devices  102 ,  104 , or  108 . For example, if the electronic device  101  should perform a function or a service automatically, or in response to a request from a user or another device, the electronic device  101 , instead of, or in addition to, executing the function or the service, may request the one or more external electronic devices to perform at least part of the function or the service. The one or more external electronic devices receiving the request may perform the at least part of the function or the service requested, or an additional function or an additional service related to the request, and transfer an outcome of the performing to the electronic device  101 . The electronic device  101  may provide the outcome, with or without further processing of the outcome, as at least part of a reply to the request. To that end, a cloud computing, distributed computing, or client-server computing technology may be used, for example. 
       FIG. 2  is a flowchart illustrating a method of operating an electronic device which generates a three-dimensional (3D) avatar according to various embodiments of the disclosure. 
     Referring to  FIG. 2 , according to various embodiments, an electronic device (for example, the electronic device  101  or the processor  120  of  FIG. 1 ) may obtain a first image for one or more external objects through a camera (for example, the camera module  180  of  FIG. 1 ) in operation  210 . The electronic device  101  may obtain a two-dimensional (2D) image through a 2D camera module  180  and the first image may be a 2D image. The one or more external objects may include people, animals, or things. For example, the electronic device  101  may obtain a 2D image of a user&#39;s face. The electronic device  101  may detect an external object corresponding to a face in the first image obtained through the camera module  180 . When no external object corresponding to the face is detected, the electronic device  101  may provide a message indicating that no face is detected. When no external object corresponding to the face is detected, the electronic device  101  may block (or skip) a process for generating a 3D avatar related to the first image. 
     In operation  220 , the electronic device  101  may provide, through a display (for example, the display device  160  of  FIG. 1 ), a 3D graphic object generated based on attributes related to the external object corresponding to the face. The attributes related to the external object may be defined for various characteristics related to the face. For example, the attributes related to the external object may include at least one of shapes of elements of the face (e.g., eyes, eyebrows, nose, cheekbones, lips, teeth, cheeks, chin, forehead, hair, facial hair (e.g., a mustache or a beard), dimples, ears, the back of the head, and a temple region), colors, the relative position between the elements, the relative size ratio between the elements, and accessories fixed to the head (for example, earrings, piercings, glasses, and nose rings). The electronic device  101  may generate a 3D graphic object by disposing at least one of the attributes related to an external object corresponding to the face on a 3D template for the face or head. The electronic device  101  may extract at least one of the attributes related to the external object to the face and apply the extracted attribute value to the 3D template to generate the 3D graphic object. The electronic device  101  may generate a 3D graphic object by applying at least one of attribute values for the length of the face, the width of the face, facial type, skin tone, the interval between eyes, the sizes of eyes, the existence or non-existence of a double eyelid, the color of eyebrows, nose length, nose position, lip size, lip position, cheekbone position, cheekbone size, and the existence or non-existence of a dimple in the external object to the 3D template. The electronic device  101  may generate a 3D graphic object using an attribute value (default value) designated to the 3D template. With respect to attributes related to hair or the back of the head, that is, attributes which are not extracted from the first image, the electronic device  101  may generate a 3D graphic object by directly applying the attribute value designated to the 3D template. The 3D graphic object may include all of the attribute values related to the face extracted from the obtained first image and the attribute value designated to the 3D template. The 3D template for the face or head may be stored in a database. The database may be included in a memory (for example, the memory  130  of  FIG. 1 ) or a server (for example, the server  108  of  FIG. 1 ). The electronic device  101  may generate one or more 3D graphic objects by changing at least one of the attributes related to the external object corresponding to the face and the 3D template. The electronic device  101  may display at least one of the one or more generated 3D graphic objects on the display device  160 . 
     In operation  230 , based on at least one attribute selected from a plurality of graphic attributes, which can be applied to the 3D graphic object and the 3D graphic object, the electronic device  101  may generate a 3D avatar for the external object. The plurality of graphic attributes which can be applied to the 3D graphic object may include brightness, color contrast, lip color, eyebrow color, mustache (beard), hairstyle, or accessories on a face (for example, glasses, a hat, earrings, and piercings). According to various embodiments, the plurality of graphic attributes which can be applied to the 3D graphic object may include motion parameters for face motions. The motion parameters may include the direction and size of the motion for each part of the face (for example, eyebrows, eyelids, a nose, and oral angle). The electronic device  101  may set motion parameter values based on the attributes related to the external object corresponding to the face. For example, the electronic device  101  may set the direction and size for an oral angle motion among the motion parameters based on the size or shape of a mouth extracted from the external object. The electronic device  101  may display at least one of the plurality of graphic attributes and the 3D graphic object together through the display device  160 . The electronic device  101  may apply at least one graphic attribute selected according to user input from the plurality of graphic attributes to the 3D graphic object. The electronic device  101  may display, for example, the brightness of the plurality of graphic attributes on the display device  160 , and when an input for the brightness is detected, may apply the detected input brightness value to the 3D graphic object. In response to a user input for the displayed graphic attributes among the plurality of graphic attributes, the electronic device  101  may display a preview for the 3D graphic object to which the input value is applied through the display device  160 . The electronic device  101  may display attributes which can be applied to the 3D graphic object and receive input for the displayed attributes to provide a function of editing the 3D graphic object to the user. The electronic device  101  may generate a 3D avatar by applying at least one graphic attribute selected from the plurality of graphic attributes to the 3D graphic object. The electronic device  101  may generate a 3D avatar by applying at least one graphic attribute selected from the plurality of graphic attributes to the 3D graphic object and reprocessing the 3D graphic object. Through part of the operation for reprocessing the 3D graphic object, the electronic device  101  may delete unnecessary information from the 3D graphic object and make information which can be simplified brief to generate the 3D avatar. The 3D avatar may be stored in the memory (for example, the memory  130  of  FIG. 1 ) or the server (for example, the server  108  of  FIG. 1 ). When the 3D avatar is stored in the server (for example, the server  108  of  FIG. 1 ), the electronic device  101  may provide the 3D avatar to the server (for example, the server  108  of  FIG. 1 ) through the communication module  190 . The 3D avatar may be stored in, for example, a gl Transmission Format (glTF). 
     In operation  240 , the electronic device  101  may generate a second image including at least one object reflecting a predetermined facial expression or motion using a 3D avatar. For example, the electronic device  101  may display one or more predetermined facial expressions or motions in the 3D avatar. The electronic device may display one or more body gestures using the 3D avatar. For example, the electronic device  101  may detect a body shape (for example, detect a boundary line of a body image) and a motion of a person from an image (for example, a still image or a moving image) and generate an object reflecting the body shape and the motion (for example, generate skeleton information corresponding to the detected body shape and motion and reflect the skeleton information in a shape or a motion of each part of the body such that the object communicates a body gesture with a high similarity). The electronic device may display one or more background effects with the 3D avatar. The electronic device  101  may generate one or more objects based on a 3D avatar generated by applying a predetermined facial expression or motion to at least one of a facial expression, a body gesture, and a background effect and generate a 2D image based on the one or more objects. The electronic device  101  may generate the second image including one or more objects using the 3D avatar based on a predetermined number of facial expressions or motions. For example, based on a predetermined expression set, in which at least one of an avatar facial expression, an avatar gesture, a background, and an animation effect is changed, the electronic device  101  may reflect the predetermined expression set in the 3D avatar to generate objects corresponding to the predetermined number of expression sets. The second image including the generated objects may be an avatar character. The second image may be a 2D image including one or more objects. The electronic device  101  may store the second image in the form of a still image or a moving image. According to various embodiments, the electronic device  101  may generate the second image using a 3D avatar reflecting at least one of the avatar facial expression, the avatar gesture, the animation effect, and the background effect. The second image may be stored in the memory (for example, the memory  130  of  FIG. 1 ) or the server (for example, the server  108  of  FIG. 1 ). When the second image is stored in the server (for example, the server  108  of  FIG. 1 ), the electronic device  101  may provide the second image to the server (for example, the server  108  of  FIG. 1 ) through the communication module  190 . The second image may be stored in, for example, a moving image file format (for example, mp4 or a gif). The electronic device  101  may provide various applications using the generated avatar characters. The electronic device  101  may provide the avatar characters through a keyboard application. For example, the electronic device  101  may provide a message sending application, a photo editing application, or a video call application using avatar characters included in the keyboard application. The avatar characters may be provided in other various applications. 
       FIGS. 3A, 3B, 3C, 3D, 3E, and 3F  illustrate an example for an operation of generating a 3D avatar provided from the electronic device to a user according to various embodiments of the disclosure. 
     The electronic device  101  may generate a 3D avatar through a camera module (for example, the camera module  180  of  FIG. 1 ). The electronic device  101  may execute the camera module  180  and provide an execution screen including an icon for generating a 3D avatar through a display (for example, the display device  160  of  FIG. 1 ). 
     Referring to  FIG. 3A , a preview screen area  301  for photographing an image, an icon  302  for creating a 3D avatar, a 3D avatar list  303 , and an icon  304  for photography by a camera may be included. The electronic device  101  may display the icon  302  including text such as “create avatar”. When the icon  302  for creating the avatar is selected, the electronic device  101  may obtain a user&#39;s facial image through the camera module  180 . 
     Referring to  FIG. 3B , the electronic device  101  may provide a preview screen area  311  for photographing an object including a face for which a 3D avatar will be generated and an icon  312  for camera photography. In order to obtain an image corresponding to various face angles or facial expressions in camera photography, guide information (for example, head orientation direction guide and emotion expression imitating guide) indicating a head orientation direction or facial expression may be further displayed. In camera photography, a plurality of photographed images through video photographing may be received. 
     Referring to  FIG. 3C , the electronic device  101  may provide an area for displaying a photographed face image  321 , an icon  322  for selecting a gender when an avatar is generated, and an icon  323  indicating selection completion. The electronic device  101  may generate one or more 3D graphic objects based on attributes related to the face in one or more photographed face images. The electronic device  101  may extract attributes related to the face from the face image and apply the attributes to a 3D template corresponding to the face to generate a realistic 3D graphic object. The electronic device  101  may extract attributes related to the face from the face image, change some of the extracted attributes, and apply the changed attributes to a 3D template corresponding to the face to generate a corrected 3D graphic object. The attributes related to the face may include at least one of shapes, the relative position between respective elements, the relative size ratio between respective elements, colors, and motion directions of face elements (e.g., eyes, eyebrows, nose, cheekbone, lips, teeth, cheek, chin, forehead, mustache (beard), dimples, and ears). The electronic device  101  may provide at least one of the one or more generated 3D graphic objects through the display device  160  and display a 3D graphic object selected from the at least one provided 3D graphic object on the screen. 
     Referring to  FIG. 3D , the electronic device  101  may provide one or more icons  332  and  333  corresponding to one or more 3D graphic objects and a preview area  331  for displaying a selected 3D graphic object. For example, the electronic device  101  may display an icon  332  corresponding to a first 3D graphic object and an icon  333  corresponding to a second 3D graphic object and display the selected first 3D graphic object  322  in the preview area  331 . The electronic device  101  may extract attributes related to the face from the face image  321  and apply the extracted attribute value to a 3D template to generate the first 3D graphic object. The electronic device  101  may extract attributes related to the face from the face image  321 , apply the extracted attribute value to a 3D template, and correct the 3D template according to a predetermined condition to generate the second 3D graphic object. According to an embodiment, during creation of a 3D graphic object, a 3D graphic object excluding a glasses attribute may be generated by not extracting or excluding an accessory (for example, glasses or earrings)-related attributes from the attributes related to the face. The electronic device  101  may use a default attribute value of the 3D template for attributes related to the face which are difficult to obtain from a 2D image. The electronic device  101  may provide at least one of a plurality of graphic attributes which can be applied to the 3D graphic object together with the 3D graphic object. The electronic device  101  may provide a selection bar  334  for controlling skin tone attributes of the 3D graphic object. The electronic device may control the skin tone to be dark according to an input for moving the selection bar  334  to the side of (−) and control the skin tone to be light according to an input for moving the selection bar  334  to the side of (+). The electronic device  101  may provide a preview in the preview area  331  by applying the input skin tone value to the 3D graphic object in response to the input. According to an embodiment, an initial position of the selection bar  334  may be determined based on the attributes (for example, color and brightness) of the face area extracted from the image  311  received through camera module  180  of the electronic device  101 . To this end, an additional operation for determining the attributes of the face area may be performed. For example, during photography by the camera module  180  using an illumination sensor included in the sensor module  176  of, the electronic device  101  may measure the illumination of ambient light and correct the attributes of the extracted face area based on the measured illumination. 
     Referring to  FIG. 3E , the electronic device  101  may generate a 3D avatar of a user&#39;s face based on graphic attributes that are selected according to user input and a 3D graphic object. The electronic device  101  may display a generated 3D avatar  341  in the preview area. The electronic device  101  may provide an avatar list area  342  for displaying one or more 3D avatars. The electronic device  101  may add an icon  343  corresponding to the generated 3D avatar  341  and display the same in the avatar list area  342 . The electronic device  101  may generate a 2D image including at least one object reflecting a predetermined facial expression or motion through a 3D avatar. For example, the electronic device  101  may generate an object based on a 3D avatar to which a smile is applied and generate a 2D image including the object. For example, it is possible to generate the object included in the 3D avatar by adding an accessory icon to the avatar list area  342  based on accessory attributes that are pre-extracted from the 3D avatar and selecting the accessory icon. The electronic device  101  may provide a function of inputting an avatar character through the 2D image. For example, the electronic device  101  may provide a photo edit including a function of inputting an avatar character. According to various embodiments, the electronic device  101  may add an object selected from at least one object included in the 2D image to the photo when editing the photo, and provide a function of editing the photo by controlling the position, size, or direction of the added object. 
     Referring to  FIG. 3F , the electronic device  101  may display an area  351  for displaying a photo to be edited, an icon  352  for providing a function of inputting an avatar character, and an area  353  for displaying one or more objects included in the selected avatar character on the screen for the photo edit. The one or more objects included in the avatar character may include at least one of a facial expression of the avatar, a gesture of the avatar, a background image, and an animation effect. The electronic device  101  may add a photo for editing a first object  354  selected from one or more objects included in the selected avatar and display the same in the area  351  for displaying the photo including the object  355 . The first object  354  may include a frown  3541 , a gesture  3542  of covering the face with both hands, and an overhead cloud background  3543 . The electronic device  101  may change the position, size, or direction of the object  355  to be edited according to user input. 
       FIGS. 4A, 4B, and 4C  illustrate a 3D graphic object generated by an electronic device and graphic attributes which can be applied to the 3D graphic object according to various embodiments of the disclosure. 
     Referring to  FIG. 4A , the electronic device  101  may display screens  410  and  420  including at least one 3D graphic object generated based on a user&#39;s face image. The electronic device  101  may generate a variety of 3D graphic objects by applying various attribute values related to the face. The electronic device  101  may generate a first 3D graphic object by applying eyes, a nose, and a mouth that are extracted from the user&#39;s face image to a 3D template. The electronic device  101  may generate a second 3D graphic object by correcting eyes, a nose, and a mouth extracted from the user&#39;s face image according to a predetermined correction reference and applying the corrected eyes, nose, and mouth to a 3D template. For example, the predetermined correction reference may be configured to change the size of eyes extracted from the user&#39;s face image to a predetermined value, change the position and shape of a nose to a predetermined value, and change the shape and color of lips to a predetermined value. 
     Referring to  FIG. 4A , the electronic device  101  may display a first icon  411  corresponding to the first 3D graphic object and a second icon  412  corresponding to the second 3D graphic object, and may display the first 3D graphic object on the screen  410  when the first icon  411  is selected according to user input and display the second 3D graphic object on the screen  420  when the second icon  412  is selected according to user input. 
     The electronic device  101  may simultaneously display the 3D graphic object and an icon indicating attributes which can be applied to the 3D graphic object. Referring to  FIG. 4B , the electronic device  101  may display a slider control  413  for selecting attributes of a skin tone of the 3D graphic object and darken or lighten the skin tone according to a user input for the slider control  413 . The electronic device  101  may display a screen  430  on which the 3D graphic object with a dark skin tone is displayed in response to the user input of darkening the skin tone and display a screen  440  on which the 3D graphic object with a light skin tone is displayed in response to the user input of lightening the skin tone. 
     The electronic device  101  may define one or more attributes which can be applied to the 3D graphic object as parameters and designate default attribute values to the parameters. The electronic device  101  may extract attribute values corresponding to one or more attributes which can be applied to the 3D graphic object from the 2D image. The one or more attributes which can be applied to the 3D graphic object may correspond to one or more attributes which can be applied to the external object included in the 2D image. For example, eyes, a nose, a mouth, a hair style, or glasses which can be applied to the external object may be applied to the 3D graphic object. The electronic device  101  may determine attribute values for the one or more attributes which can be applied to the 3D graphic object in accordance with a 3D template. The electronic device  101  may generate one or more attribute values which can be applied to the 3D graphic object based on user input. For example, referring to  FIG. 4C , the electronic device  101  may provide a screen  450  for editing hairstyle attributes which can be applied to the 3D graphic object, a screen  460  for editing glasses accessory attributes, and a screen  470  for editing a 3D avatar outfit attributes. The electronic device  101  may provide a hairstyle list  451  and a hair color list  452  for the hairstyle attributes which can be applied to the 3D graphic object. The electronic device  101  may preferentially apply a first hairstyle selected from the hairstyle list  451  based on the attributes extracted from the 2D image or attributes set in accordance with the 3D template and display the first hairstyle on the 3D graphic object. For example, the electronic device  101  may select a hairstyle which matches facial type attributes based on the facial type attributes extracted from the 2D image as the first hairstyle and preferentially apply the selected hairstyle. The electronic device  101  may display the 3D graphic object to which the selected hairstyle and hair color are applied. The electronic device  101  may provide a glasses accessory list  461  which can be applied to the 3D graphic object, apply a selected glasses accessory to the 3D graphic object, and display the 3D graphic object. The electronic device  101  may provide a 3D avatar outfit list  471  which can be applied to the 3D graphic object and display the 3D graphic object to which a selected 3D avatar costume is applied. 
       FIG. 5  illustrates an operation in which an electronic device generates a 3D avatar based on a 2D image according to an embodiment of the disclosure. 
     Referring to  FIG. 5 , the electronic device  101  may extract an external object corresponding to a face from a 2D image including one or more external objects. Specifically, the electronic device  101  may extract an external object  511  corresponding to a face from a 2D image  510  including the user&#39;s face. The electronic device  101  may determine whether the face is included in the 2D image  510  through a face detection algorithm. For example, at least part of a method of extracting the external object may use a rule-based model or an artificial intelligence model learned according to at least one of machine learning, a nerve network, and a deep learning algorithm. The electronic device  101  may receive an artificial intelligence model from a server. For example, the electronic device  101  may extract the external object  511  corresponding to the face from the 2D image  510  through a multi-task cascaded neural network (MTCNN). The external object  511  may include eyes  521  and  522 , a nose  523 , or lips  524  indicating attributes related to the face. The electronic device  101  may define attributes which can be applied to the external object  511  as parameters and designate attribute values extracted from the external object  511  as parameter values. The attributes which can be applied to the external object  511  may include, for example, at least one of gender, race, age, attractiveness, facial expression hair color, part, hair length, cheekbone, face type, skin tone, eye position, eye size, eyebrow length, eyebrow shape, eyebrow size, nose length, nose position, nose shape, lip shape, lip color, lip length, hat, glasses, earrings, necklace, lipstick color, and necktie shape. For example, the electronic device  101  may define a parameter for gender and designate a female or male value. The electronic device  101  may determine a 3D template  530  for creating a 3D avatar. The 3D template may be varied according to the type of the 3D avatar to be generated. For example, the electronic device  101  may use different 3D templates depending on gender, race, nationality, or age. In another example, the electronic device  101  may generate a 3D avatar for an animal, a character, or a thing, and may use various 3D templates according to an animal shape, a character shape, or an object shape. The electronic device  101  may receive at least one 3D template from an external electronic device. The electronic device  101  may generate a 3D avatar  540  by applying attributes related to the external object  511  extracted from the 2D image  510  to the 3D template. The electronic device  101  may provide the 3D graphic object (not shown) generated through the application of the attributes related to the external object  511  extracted from the 2D image  510  to the 3D template. The attributes which can be applied to the external object may be applied to the 3D graphic object. The electronic device  101  may generate the 3D graphic object by reflecting attributes extracted from the external object or attributes selected by a user input and generate a 3D avatar  540  based on the 3D graphic object. The electronic device  101  may generate the 3D avatar  540  by applying the eye  521  of the external object  511  to an eye area of the 3D template  530 . The electronic device  101  may generate the 3D avatar  540  with an attribute value designated to the 3D template  530  for attributes which are not extracted from the external object  511 , for example, a hairstyle. The electronic device  101  may output one or more sample attributes of the attributes which can be applied to the external object to the user through the display (for example, the display device  160  of  FIG. 1 ). The electronic device  101  may generate the 3D avatar  540  by applying attributes selected from the one or more sample attributes according to a user&#39;s selection. The electronic device  101  may select recommended attributes from the one or more sample attributes based on the attributes extracted from the 2D image or the determined 3D template and provide the recommended attributes. The electronic device  101  may provide a preview to the user by providing the 3D graphic object reflecting the sample attributes through the display device  160 . 
       FIG. 6  illustrates a 2D image including at least one object generated using a 3D avatar by an electronic device according to various embodiments of the disclosure. 
     Referring to  FIG. 6 , the electronic device  101  may generate one or more objects by applying one or more facial expressions or motions designated to the 3D avatar. The object may be determined in accordance with at least one of a facial expression of the avatar, a gesture of the avatar, a background, and an animation effect. For example, the one or more designated facial expressions or motions may be designated to at least one of the facial expression of the avatar, the gesture of the avatar, the background, and the animation effect. For example, a smile, crying, or a remote expression may be used for the facial expression of the avatar, and a gesture of making a heart with hands or a gesture of nodding an avatar&#39;s head may be used for the gesture of the avatar. At least one of the facial expression of the avatar, the gesture of the avatar, the background, and the animation effect may be designated as a motion. The electronic device  101  may generate at least one object by applying the designated facial expression or motion through the avatar generated for the external object corresponding to the face extracted from the 2D image that is obtained using the camera (for example, the camera module  180  of  FIG. 1 ). The electronic device  101  may generate a predetermined number of objects at a time by applying a predetermined number of facial expressions or motions to the 3D avatar. For example, the electronic device  101  may generate 18 different objects by applying a set of 18 predetermined expressions to the 3D avatar. The set of 18 predetermined expressions may be designated by changing at least one of the facial expression of the avatar, the gesture of the avatar, the background, and the animation effect. The 2D image including one or more objects may be an avatar character. The electronic device  101  may output the avatar character through the display (for example, the display device  160  of  FIG. 1 ). 
     The electronic device  101  may generate one or more avatar characters through one or more 3D avatars and provide a 3D avatar character list through the display device  160 . For example, the electronic device  101  may display an avatar character  610  on the display device  160  and display one or more objects included in the avatar character  610  in a first area  611 . The first area  611  may include a plurality of objects of which at least one of facial expressions of the avatar, gestures of the avatar, backgrounds, and animation effects are different. A first object  620  among the one or more objects included in the avatar character  610  may include an avatar  621  and a background  622 . The avatar  621  of the first object  620  may be generated according to a predetermined facial expression or gesture and the background  622  of the first object  620  may include an additional object  623 . An animation effect may be applied to the avatar  621  or the background  622  of the first object  620 . For example, the additional object  623  of the background  622  may include an effect moving leftward and rightward. The avatar character may be a still image or a moving image. When the avatar character is a moving image, at least one of the facial expression of the avatar of the object, the gesture of the avatar, the background, and the additional object may move. 
       FIG. 7  illustrates editing a photo using an avatar character by the electronic device according to various embodiments of the disclosure. 
     Referring to  FIG. 7 , the electronic device  101  may display a selected object of the avatar character in a first position  711  on a photo edit screen  710 . The electronic device  101  may move the object from the first position  711  to another position according to user input. The electronic device  101  may display the photo edit screen  720  on which the object has moved to a second position  721 . The electronic device  101  may change the size or direction of the object according to user input. The electronic device  101  may display a photo edit screen  730  including an object  731  of which the size or direction is changed. 
       FIG. 8  illustrates transmitting a selected object of an avatar character through a message by an electronic device according to various embodiments of the disclosure. 
     Referring to  FIG. 8 , the electronic device  101  may provide the avatar character generated using the 3D avatar through a keyboard application. The electronic device  101  may provide the avatar character included in the keyboard application through a message transmission application. For example, the electronic device  101  may provide a screen area  810  in which an application for transmitting a message is executed. The screen area  810  may include a first area  811  for displaying the content of the message, a second area  812  for displaying an item list for writing the message, and a third area  813  for selecting items to input into the message. The items for input into the message may include a text input item, a photo input item, a file attachment item, a voice input item, a position transmission item, or an avatar character input item. 
     The electronic device  101  may provide, as an avatar character, a second image including at least one object in which a predetermined facial expression or motion is reflected using a 3D avatar generated in accordance with an external object included in a first image obtained through the camera (for example, the camera module  180  of  FIG. 1 ). The avatar character input item may be included in the items for inputting into the message. The electronic device  101  may display the second area  812  including the avatar character input item  814 . The electronic device  101  may provide the avatar character in the third area in response to a selection of the avatar character input item  814  in the displayed item list. 
     The electronic device  101  may display, in a first area  822 , one or more objects included in a first avatar character  821  selected from one or more avatar characters in the screen area  820  in which the application for sending a message is executed. The electronic device  101  may provide one or more avatar characters in a list form. The one or more objects included in the first avatar character  821  may include different facial expressions or motions. For example, a first object  823  may include a smile. 
     The electronic device  101  may display a preview  832  and a send button of the first object  831  in a first area  835  for displaying the content of the message in response to a selection of the first object  831  among the one or more objects displayed in the screen area  830  in which the application for sending the message is executed. When the first object  831  is a moving image, the electronic device  101  may play the first object  831  and provide the preview  832 . The electronic device  101  may transmit the selected first object  831  through the message in response to clicking the send button  833 . The electronic device  101  may display and provide, in a first area  841  for displaying the content of the message, a selected first object  842  of the avatar character in the screen area  840  in which the application for sensing the message is executed. 
       FIG. 9  illustrates editing contacts to include an avatar character by an electronic device according to various embodiments of the disclosure. 
     Referring to  FIG. 9 , the electronic device  101  may display a photo item  911  and a name item  912  in an application execution screen area  910  for storing and managing contacts. The electronic device  101  may display an object selected from one or more objects included in the avatar character in the photo item  911  of the contact. According to various embodiments, the electronic device  101  may provide the photo item and the name item of the contact to the display (for example, the display device  160  of  FIG. 1 ) in response to receiving a call and display an object stored in the photo item of the contact. 
       FIG. 10  illustrates a 3D avatar generated based on a 2D image including an animal head by an electronic device according to various embodiments of the disclosure. 
     Referring to  FIG. 10 , when an external object is an animal, the electronic device  101  may generate a 3D avatar using a 3D template corresponding to the animal. The electronic device  101  may obtain a 2D image  1001  including a mouse&#39;s head. The electronic device  101  may detect head-related attributes from the 2D image  1001  including the mouse&#39;s head or may transmit the 2D image  1001  to an external electronic device or a server and the external electronic device or the server may detect head-related attributes. The electronic device  101 , the external electronic device, or the server may determine a 3D template  1002  corresponding to mouse head attributes based on the head-related attributes. The electronic device  101  may receive the 3D template  1002  from the external electronic device or the server. The electronic device  101  may generate a 3D avatar  1003  by applying mouse&#39;s head-related attributes extracted from the 2D image  1001  to the 3D template  1002 . For example, the mouse&#39;s head-related attributes may include at least one of shapes of elements of the head (eyes, eyebrows, cheekbone, lips, teeth, cheek, chin, forehead, hair, mustache (beard), ears, the back of the head, and a temple region), colors, the relative position between the elements, and the relative size ratio between the elements. In order to extract an external object corresponding to the animal&#39;s head from the 2D image  1001 , the electronic device  101  may use information generated by analyzing and determining characteristics of the animal&#39;s head. 
       FIG. 11  illustrates a 3D avatar generated based on a 2D image including a character by an electronic device according to various embodiments of the disclosure. 
     Referring to  FIG. 11 , when an external object is a character, the electronic device  101  may generate a 3D avatar using a 3D template corresponding to the character. The electronic device  101  may receive the 3D template corresponding to the character from an external electronic device or a server. The electronic device  101  may obtain a 2D image  1101  including a character. For example, the character may include at least one of a cartoon character, an animal character, a plant character, a character of a particular person, a character of a thing, and a movie hero character. The electronic device  101  may determine the 3D template  1102  corresponding to the character. The electronic device  101  may generate the 3D avatar  1103  by applying attributes related to the character extracted from the 2D image  1101  to the 3D template  1102 . For example, the attributes related to the character may include one or more of shapes of elements of the character (head, arms, legs, and body), colors, the relative position between the elements, the relative size between the elements, and accessories which can be applied to the elements (hair band, bag, glasses, and items). 
       FIG. 12  illustrates a 3D avatar generated based on a 2D image including an accessory by an electronic device according to various embodiments of the disclosure. 
     Referring to  FIG. 12 , the electronic device  101  may obtain a 2D image  1210  including an electrical outlet. The electronic device  101  may extract a configuration corresponding to attributes related to a face from the electrical outlet through a face feature extraction algorithm. According to various embodiments, the electronic device  101  may designate attributes related to the face from the 2D image  1210  according to user input. The electronic device  101  may designate a first configuration  1201  of the electrical outlet as a face form in the 2D image  1220  according to a user input, second configurations  1202  of the electrical outlet as eyes, and a third configuration  1203  of the electrical outlet as a mouth. The electronic device  101  may designate a 3D template  1230  to generate a 3D avatar corresponding to the electrical outlet. The electronic device  101  may select a 3D template similar to the electrical outlet among one or more 3D templates or use a predetermined 3D template. The electronic device  101  may generate a 3D avatar by applying face-related attributes values associated with the configurations  1201 ,  1202 , and  1203  to the 2D image  1210  to the 3D template  1230 . The electronic device  101  may generate one or more objects  1241 ,  1242 , and  1243  by reflecting expression attributes related to a predetermined facial expression through the 3D avatar. The electronic device  101  may provide a 2D image  1240  including one or more objects. 
       FIGS. 13 and 14  illustrate expression attributes related to a face according to various embodiments of the disclosure. 
     The electronic device (for example, the electronic device  101  or the processor  120  of  FIG. 1 ) may variously change facial expressions of a 3D avatar at least using expression attributes related to a face. The expression attributes related to the face may be classified according to circumstances and may be defined according to elements included in the face. 
     Referring to  FIG. 13 , circumstances may include normal, smile  1 , and smile  2 , expression attributes corresponding to eyes may be defined by shapes, and expression attributes corresponding to a mouth may be defined by shapes. The electronic device  101  may not designate attributes of eyes but may designate an attribute value of a mouth as an upwardly rounded semicircular shape in the normal circumstance. The electronic device  101  may directly apply the attribute value of the eyes extracted from the 2D image and may change the attribute value of the mouth extracted from the 2D image to the semicircular shape according to expression attributes and apply the changed value in order to generate the 3D avatar in the normal circumstance. The electronic device  101  may classify and designate similar circumstances as one circumstance. 
     Referring to  FIGS. 12 and 13 , the electrical outlet of  FIG. 12  indicates a facial expression corresponding to the normal circumstance in  FIG. 13 . According to an embodiment, the electronic device  101  may detect attributes of a face element from an image including a face object received through the camera module  180 , determine expression attributes corresponding to the detected attributes of the face element, and change a 3D avatar in accordance with the determined expression attributes. Accordingly, the electronic device  101  may detect a change from the face image received in real time, change a 3D avatar  1230  in accordance therewith, and change one or more objects  1241 ,  1242 , and  1243  according thereto. 
     Referring to  FIG. 14 , the electronic device  101  may classify a general circumstance, a default circumstance, and a standby circumstance as one circumstance and define expression attributes corresponding to eyes as expression attribute set  1  and expression attribute set  2 .  FIG. 14  illustrates a plurality of expression attribute sets related to eyes and each of other elements (for example, the nose, the mouth, and the ears) may have a plurality of expression attribute sets although not illustrated. According to an embodiment, the expression attribute sets of different elements may have a correlation therebetween. For example, expression attribute set  1  of the eyes and expression attribute set  1  of the mouth may have a correlation therebetween and expression attribute set  2  of the eyes and expression attribute set  2  of the mouth may have a correlation therebetween. For example, one attribute group may include expression attribute sets having a correlation therebetween. For example, in the case of avatar character  1 , attribute group  1  corresponding thereto may include expression attribute set  1  of the eyes and expression attribute set  1  of the mouth having the correlation therebetween. 
       FIG. 15  illustrates a 3D avatar generated using various 3D templates by an electronic device according to various embodiments of the disclosure. 
     Referring to  FIG. 15 , the electronic device  101  may generate a 3D avatar based on a 2D image including an external object. The electronic device  101  may determine whether an external object included in a 2D image  1510  includes a face, and when the face is included, may extract the face. The electronic device  101  may extract a face area  1520  including ears, eyes, and a mouth from the external object. The electronic device  101  may select a target  1530  to which expression attributes are applied in the face area  1520 . For example, the electronic device  101  may provide the extracted face area  1520  through a display (for example, the display device  160  of  FIG. 1 ) and select eyes for the target  1530  in the displayed face area  1520  according to user input. The electronic device  101  may determine a 3D template  1540  for creating a 3D avatar. The electronic device  101  may select the 3D template  1540  different from the external object corresponding to the face of the 2D image  1510 . For example, the electronic device  101  may determine a 3D template corresponding to a 3D avatar according to user input. When the 3D template  1540  does not include a configuration corresponding to the face, the electronic device  101  may select a matching area of the 3D template  1540  in order to apply the face of the external object extracted from the 2D image  1510  to the 3D template  1540 . The electronic device  101  may determine to match the face area  1520  of the external object with a first position  1551  of the 3D template  1550 . At this time, the electronic device  101  may further include an operation for displaying a candidate area of the 3D template  1550  with which the face area  1520  of the external object may match and selecting the candidate area. For example, the candidate area may further include an operation for determining whether a condition (for example, a template size and shape) under which the face area  1520  of the external object can be disposed on the 3D template  1550  is satisfied. According to an embodiment, the shape of the 3D template  1550  may be changed based on the face area  1520  of the external object to match therewith. For example, the electronic device  101  may determine another 3D template (not shown) which is changed in accordance with some (for example, ears) of the face area  1520  that does not match the first position  1551  of the 3D template  1540  or has a high similarity. 
     The electronic device  101  may apply an attribute value of the face area  1520  to the first position  1551  of the 3D template  1540 . The electronic device  101  may display a 3D graphic object  1560  generated by applying attributes of the external object  1510  to the 3D template  1540 . The electronic device  101  may apply predetermined expression attributes to the target selected from the 3D graphic object  1560  to apply expression attributes. The electronic device  101  may generate a 3D avatar  1570  by applying smiling expression attributes to eyes  1571  selected from the 3D graphic object  1560 . According to an embodiment, when selecting a target to which expression attributes are applied in the 3D graphic object  1560  and selecting expression attributes, the electronic device  101  may detect attributes of face elements from a face image (for example, a face of a person, an animal, or a character) additionally received through the camera module  180  and determine one or more targets (for example, elements (for example, eyes  1571 ) of the external 3D graphic object  1560 ) and expression attributes corresponding to the targets based on the detection (for example, attribute change detection) to generate the 3D avatar  1570 . 
       FIGS. 16 and 17  illustrate attributes related to a 3D graphic object generated based on a 2D image by an electronic device according to various embodiments of the disclosure. 
     Referring to  FIG. 16 , the electronic device  101  may generate graphic attributes which can be applied to the 3D graphic object. In particular, the electronic device  101  may obtain a 2D image  1601  including an accessory which can be applied to the 3D graphic object. The electronic device  101  may generate one or more attributes which can be applied to the 3D graphic object based on the 2D image obtained through the camera (for example, the camera module  180  of  FIG. 1 ). The one or more attributes which can be applied to the 3D graphic object may include, for example, at least one of gender, race, age, attractiveness, facial expression, hair color, part, hair length, cheekbone, face type, skin tone, eye position, eye size, eyebrow length, eyebrow shape, eyebrow size, nose length, nose position, nose shape, lip shape, lip color, lip length, hat, glasses, earrings, necklace, lipstick color, and necktie shape. The electronic device  101  may provide guide information for describing an operation of generating one or more attributes which can be applied to the 3D graphic object through the display (for example, the display device  160  of  FIG. 1 ). For example, the electronic device  101  may provide a list of one or more attributes which can be applied to the 3D graphic object through the display device  160 . The electronic device  101  may provide guide information for camera photography through the display device  160  in order to generate attributes selected by user input. The electronic device  101  may provide, for example, guide information such as “photograph glasses at the center of the screen” in order to generate glasses attributes. The electronic device  101  may obtain a 2D image  1601  including glasses through the camera module  180 . The electronic device  101  may determine a 3D template  1602  corresponding to the glasses extracted from the 2D image  1601 . The electronic device  101  may make a request for or receive at least one template related to a thing extracted from the 2D image  1601  from an external electronic device or a server in order to determine the 3D template corresponding to the thing extracted from the 2D image  1601 . For example, the electronic device  101  may search for the name of the thing and obtain a 3D template. The electronic device  101  may extract attributes related to the glasses extracted from the 2D image  1601  and apply an attribute value of the extracted glasses to the 3D template  1602  to generate graphic attributes  1603 . The electronic device  101  may display the generated graphic attributes  1603  in a graphic attribute list area. The electronic device  101  may apply the generated graphic attributes  1603  to the 3D graphic object  1604  and display the 3D graphic object  1604  in order to provide a preview to the user. The electronic device  101  may provide a function of changing or deleting the generated graphic attributes  1603 . The electronic device  101  may obtain another 2D image through the camera module  180  in order to change the generated graphic attributes  1603 . The electronic device  101  may change the 3D template  1602  corresponding to the glasses in order to change the generated graphic attributes  1603 . 
     Referring to  FIG. 17 , the electronic device  101  may obtain a 2D image  1701  including attributes which can be applied to a 3D graphic object. The electronic device  101  may extract attributes from the 2D image  1701 . Attributes which can be applied to the 3D graphic object may include a color, a pattern, or a shape. For example, the attributes may be a check pattern with a red color. The electronic device  101  may select a 3D template  1702  to which the attributes extracted from the 2D image  1701  are applied. The electronic device  101  may select the 3D template  1702  corresponding to a top and apply the extracted attributes to the selected 3D template  1702  to generate graphic attributes  1703 . The electronic device  101  may provide the generated graphic attributes  1703  through the display device  160 , and when the graphic attributes  1703  are selected, may apply the graphic attributes  1703  to the 3D graphic object  1704  and display the 3D graphic object  1704 . 
       FIG. 18  illustrates a 3D avatar generated based on a 2D image including an external object corresponding to a face and an additional object by an electronic device according to various embodiments of the disclosure. 
     Referring to  FIG. 18 , the electronic device  101  may extract one or more external objects  1811 ,  1812 , and  1813  included in a 2D image  1810 . The electronic device  101  may determine whether the one or more extracted external objects  1811 ,  1812 , and  1813  correspond to faces. For example, the electronic device  101  may determine that the first external object  1811  and the second external object  1812  correspond to human faces and that the third external object  1813  does not correspond to the face. The electronic device  101  may generate a 3D avatar including the external object which does not correspond to the face. The electronic device  101  may determine whether one or more external objects are included in predetermined additional objects. The additional objects indicate objects which do not correspond to the face but can be included in the 3D avatar and be, for example, landmarks, characters, or objects designated by the user. When the one or more external objects included in the 2D image correspond to landmarks, characters, or objects designated by the user, the electronic device  101  may generate a 3D avatar including the external objects. 
     Referring to  FIG. 18 , the 2D image  1810  may include two people and the Eiffel Tower. The electronic device  101  may determine that the Eiffel Tower is the additional object and generate a 3D avatar including the Eiffel Tower. The electronic device  101  may generate a 3D avatar  1820  including the first external object  1811  corresponding to the face, the second external object  1812  corresponding to the face, and the third external object  1813  corresponding to the Eiffel Tower. The electronic device  101  may generate each 3D graphic object based on the first external object  1811 , the second external object  1812 , and the third external object  1813  and determine graphic attributes which can be applied to the 3D graphic objects to generate the 3D avatar  1820 . The electronic device  101  may generate the 3D avatar  1820  by applying a facial expression of the avatar, a gesture of the avatar, a background, and an animation effect to at least one of the first external object  1811 , the second external object  1812 , and the third external object  1813 . For example, the electronic device  101  may apply a surprised look to the first external object  1811 , apply a body gesture of making a heart with fingers to the second external object  1812 , or control the size of the third external object  1813 . 
       FIGS. 19A and 19B  illustrate an operation in which an electronic device generates an image including a plurality of 3D avatars according to various embodiments of the disclosure and  FIG. 20  illustrates expression attributes of a 3D avatar according to various embodiments of the disclosure. 
     Referring to  FIG. 19A , the electronic device  101  may select one or more external objects corresponding to faces based on a 2D image including a plurality of external objects and generate 3D avatars corresponding to the selected external objects. Specifically, the electronic device  101  may obtain a 2D image  1910  including three human faces. The electronic device  101  may extract one or more external objects from the 2D image  1910  and determine whether the extracted external objects correspond to faces. The electronic device  101  may display identifiers (for example, dotted squares) indicating external objects  1911 ,  1912 , and  1913  corresponding to the extracted faces in the 2D image  1920 . The electronic device  101  may sequentially generate 3D avatars for the first external object  1911 , the second external object  1912 , and the third external object  1913  corresponding to faces. The electronic device  101  may use one or more 3D avatars to generate a plurality of 3D avatars corresponding to a plurality of external objects. The electronic device  101  may provide one or more 3D avatars through the display device  160  in order to select a 3D avatar corresponding to an external object and determine that the 3D avatar selected according to user input corresponds to the external object. In response to a selection of a first external object  1931  by a user input received through the input device  150  among the plurality of external objects, the electronic device  101  may display an identifier (for example, a circle) indicating the selected first external object  1931  in a 2D image  1930 . The electronic device  101  may display one or more 3D avatars  1935  which may correspond to the selected first external object  1931 . The one or more 3D avatars  1935  may include an animal 3D set  19341  related to animals and a woman set  19352  related to heroines according to a category. One category may include expression attribute sets of characters associated with each other and the expression attribute set for each character may include an expression attribute subset (for example, an expression attribute set (eyes)) corresponding to a condition for each of elements of the character (for example, a body, eyes, a nose, a mouth, hands, or feet). 
     The electronic device  101  may select a first 3D avatar  1942  corresponding to a first external object  1941  from one or more 3D avatars and display the selected first 3D avatar  1942  in a 2D image  1940 . The electronic device  101  may generate first 3D avatars reflecting facial expressions corresponding to one or more conditions of the face and the body gesture based on one or more of the attributes related to the face and the body gesture of the first external object  1911 . 
     Referring to  FIG. 20 , one or more 3D avatars  1920  may include predetermined expression attributes related to facial expression according to predetermined circumstances. The electronic device  101  may define one or more circumstances and define expression attributes related to facial expressions of the 3D avatar according to circumstances. The expression attributes of the 3D avatar may include a shape and a motion of eyes, a nose, or a mouth corresponding to the face and also include a shape and a motion of a head, ears, arms, legs, or a belly corresponding to elements other than the face. For example, the electronic device  101  may define a general circumstance  2011  and define expression attributes  2021  and  2031  for one or more avatars. 
     Referring to  FIG. 19B , the electronic device  101  may reflect smiling attributes according to a smile of the first external object  1941  to generate a first 3D avatar. In order to generate 3D avatars corresponding to other external objects in accordance with a selection of a first 3D avatar  1952  corresponding to the first external object  1951  in the 2D image  1950 , the electronic device  101  may recommend 3D avatars  1955  belonging to the same category as the first 3D avatar  1952 . For example, when the first 3D avatar  1952  belongs to a category related to an animal, the electronic device  101  may display the 3D avatars  1955 , which include an animal 3D set. 
     The electronic device  101  may select a second 3D avatar  1962  corresponding to a second external object  1961  selected in the 2D image  1960  and sequentially select a third 3D avatar  1972  corresponding to a third external object  1971  selected in the 2D image  1970 . The electronic device  101  may generate an image  1980  including 3D avatars  1981 ,  1982 , and  1983  generated by applying facial expression attributes selected based on the attributes related to faces of a plurality of external objects to a plurality of 3D avatars  1952 ,  1962 , and  1972  selected in accordance with the plurality of external objects  1951 ,  1961 , and  1971 . 
     According to various embodiments, when there are a plurality of external objects, the electronic device  101  may determine the 3D avatars  1955  recommended and displayed for other selected external objects according to the facial expression attributes of the selected external object and the selected avatar category. For example, when a first person is smiling and a second person is crying and when an external object corresponding to a third person is selected, expression characteristics of the recommended 3D avatars  1955  may include a 3D avatar corresponding to the smile or the crying among characters belonging to the same category. 
       FIGS. 21A, 21B, 21C, 21D, and 21E  illustrate an operation in which an electronic device shares a 3D avatar with an electronic device of a video call counterpart according to various embodiments of the disclosure. 
       FIGS. 21A, 21B, 21C, 21D, and 21E , the electronic device  101  may provide a video call function and generate a 3D avatar in accordance with an external object corresponding to a face among external objects displayed on a video call screen. The electronic device  101  may share the 3D avatar with a counterpart&#39;s electronic device making the video call. 
     Referring to  FIG. 21A , the electronic device  101  may execute a video call function, and when the video call is connected, may display a video call screen  2101 . The electronic device  101  may extract one or more external objects  2110  and  2120  from the displayed video call screen  2101  and determine whether the extracted external objects correspond to faces. The electronic device  101  may sequentially generate 3D avatars corresponding to the first external object  2110  and the second external object  2120 . 
     Referring to  FIG. 21B , the electronic device  101  may display one or more 3D avatars  2130  in response to a selection of the second external object  2120 . 
     Referring to  FIG. 21C , the electronic device  101  may determine that a first 3D avatar  2131  selected according to user input corresponds to a second external object  2120 . 
     Referring to  FIG. 21D , in response to a selection of the first external object  2110 , the electronic device  101  may display one or more 3D avatars  2140  selected based on the first 3D avatar. 
     The electronic device  101  may determine that a second 3D avatar  2132  selected from one or more 3D avatars  2140  corresponds to the first external object  2110 . According to an embodiment, in response to a selection of the first external object  2110 , the electronic device  101  may transmit one or more 3D avatars  2140  selected based on the first 3D avatar to the counterpart&#39;s electronic device. The counterpart&#39;s electronic device may perform an operation of receiving the one or more 3D avatars  2140  selected based on the first 3D avatar from the electronic device  101 , displaying the 3D avatars  2140  in a video call screen  2210 , and selecting one avatar (for example, the second 3D avatar  2132 ) therefrom. The electronic device  101  may receive a signal corresponding to the second 3D avatar  2132  selected by the counterpart&#39;s electronic device. 
     According to an embodiment, based on the category or facial expression attributes of the first 3D avatar  2131  selected in accordance with the selected second external object  2120 , the electronic device  101  may determine and display 3D avatars  2130  in the same category or facial attributes in accordance with the first external object  2110  selected thereafter. 
     Referring to  FIG. 21E , the electronic device  101  may display and provide 3D avatars  2111  and  2121  corresponding to external objects on the video call screen. 
       FIG. 22  illustrates an operation in which an electronic device shares a 3D avatar with an electronic device of a video call counterpart according to various embodiments of the disclosure. 
     Referring to  FIG. 22 , when the electronic device  101  makes a video call with a counterpart&#39;s electronic device, the electronic device  101  may display an external object  2211  corresponding to a user and an external object  2212  corresponding to a counterpart on a video call screen  2210  of the electronic device  101  and display an external object  2221  corresponding to the counterpart and an external object  2222  corresponding to the user on a video call screen  2220  of the counterpart&#39;s electronic device. At this time, the counterpart&#39;s electronic device may also perform an operation of selecting an external object or displaying and selecting 3D avatars corresponding thereto. The electronic device  101  may transmit an indicator displayed therefor and 3D avatars to the counterpart&#39;s electronic device. 
     Referring to  FIG. 22 , the electronic device  101  may generate 3D avatars corresponding to the external object  2211  corresponding to the user and the external object  2212  corresponding to the counterpart. The electronic device  101  may display generated 3D avatars  2231  and  2232  on a video call screen  2230  and transmit the 3D avatars  2231  and  2231  to the counterpart&#39;s electronic device. The counterpart&#39;s electronic device may display received 3D avatars  2241  and  2242  on a video call screen  2240 . An electronic device (for example, the electronic device  101  of  FIG. 1 ) according to various embodiments may include a camera (for example, the camera module  180  of  FIG. 1 ); a display (for example, the display device  160  of  FIG. 1 ); and a processor (for example, the processor  120  of  FIG. 1 ), wherein the processor  120  may obtain a first image for one or more external objects through the camera module  180 , provide a 3D graphic object generated based on attributes related to an external object corresponding to a face among the one or more external objects included in the first image through the display device  160 , generate a 3D avatar for the external object at least based on at least one graphic attribute selected from a plurality of graphic attributes which can be applied to the 3D graphic object and the 3D graphic object, and generate a second image including at least one object reflecting a predetermined facial expression or motion using the 3D avatar. According to an embodiment, the processor  120  may determine a 3D template including at least one attribute corresponding to the external object, extract attributes related to the external object from the first image, and generate a 3D graphic object by applying the extracted attributes to the at least one attribute corresponding to the 3D template. According to an embodiment, the processor  120  may extract at least one element of the face from the first image and identify a shape of each element, a color, the relative position between the elements, the relative size ratio between the elements, or an attribute value of an accessory of each element. According to an embodiment, with respect to the attributes of the 3D template irrelevant to the extracted attributes, the processor  120  may generate the 3D graphic object by applying predetermined attributes to the 3D template. According to an embodiment, the processor  120  may determine a 3D template different from the external object corresponding to the face. According to an embodiment, the object may be determined in accordance with a facial expression of the avatar, a gesture of the avatar, a background, or an animation effect, and the processor  120  may generate at least one object reflecting a predetermined value of at least one of the facial expression of the avatar, the gesture of the avatar, the background, and the animation effect using the 3D avatar. According to an embodiment, with respect to a first external object among the one or more external objects, the processor  120  may make at least one configuration corresponding to the face correspond to a configuration of the first external object. According to an embodiment, the processor  120  may generate graphic attributes, based on a first external object which satisfies a predetermined condition among the one or more external objects. According to an embodiment, the processor  120  may determine a 3D template corresponding to the first external object or a predetermined 3D template according to a user input and apply attributes of the first external object to the determined 3D template to generate the graphic attributes. According to an embodiment, the processor  120  may select an additional object which does not correspond to the face from among the one or more external objects and add the selected additional object to generate the 3D avatar. According to an embodiment, the processor  120  may transmit the generated second image to an external electronic device. According to an embodiment, the first image may be a 2D image and the second image may be a 2D still image or a 2D moving image. 
     An electronic device (for example, the electronic device  101  of  FIG. 1 ) according to various embodiments may include a camera (for example, the camera module  180  of  FIG. 1 ); and a processor (for example, the processor  120  of  FIG. 1 ), wherein the processor  120  may obtain a first image for one or more external objects through the camera module  180 , select a 3D avatar corresponding to an external object among one or more 3D avatar, based on the external object corresponding to a face among the one or more external objects included in the first image, and generate a second image including an object generated using the 3D avatar reflecting a facial expression corresponding to the face of the external object. According to an embodiment, the electronic device may further include a communication module (for example, the communication module  190  of  FIG. 1 ) and the processor  120  may receive the one or more 3D avatars through the communication module  190 . According to an embodiment, the processor  120  may reflect, in the 3D avatar, a first expression attribute selected based on the facial expression corresponding to the face of the external object among expression attributes related to facial expressions of a predetermined face corresponding to one or more circumstances. According to an embodiment, the expression attributes related to the facial expressions of the predetermined face corresponding to the one or more circumstances may be defined in accordance with eyes, a nose, or a mouth. According to an embodiment, the object may include a facial expression of an avatar, a gesture of an avatar, a background, or an animation effect. 
     An electronic device (for example, the electronic device  101  of  FIG. 1 ) according to various embodiments may include a camera (for example, the camera module  180  of  FIG. 1 ); and a processor (for example, the processor  120  of  FIG. 1 ), wherein the processor  120  may be configured to obtain a first image for one or more external objects through the camera module  180 , identify whether there is an external object corresponding to a face in the one or more external objects included in the first image, generate a 3D avatar, based on attributes related to the external object when there is the external object corresponding to the face, and block generating of a 3D avatar when there is no external object corresponding to the face. According to an embodiment, the electronic device may further include a display (for example, the display device  160  of  FIG. 1 ) and the processor  120  may provide information on whether there is the external object corresponding to the face in the one or more external objects through the display device  160 . 
     While the disclosure has been shown and described with reference to various embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure as defined by the appended claims and their equivalents.