WO2021187778A1 - Electronic device for performing photographing using flash - Google Patents

Abstract

Disclosed is an electronic device comprising a flash, a first camera device, a second camera device, and a processor operatively connected to the flash, the first camera device, and the second camera device. The processor may be configured to: measure, on the basis of a first image acquired through the first camera device and a second image acquired through the second camera device, depth information corresponding to the first image; and determine an image synthesis condition for obtaining third images on the basis of the depth information, wherein the image synthesis condition includes details related to the operation of the flash or the first camera device at the time of acquisition of the third images. Various other embodiments inferred from the specification are also possible.

Description

Electronic devices that use flash to take pictures

Embodiments disclosed in this document relate to photographing technology of an electronic device.

BACKGROUND With the rapid development of imaging devices, development of an image capturing device such as a camera or camcorder equipped with an image sensor is accelerating. The image photographing apparatus captures an image, records it on a recording medium, and simultaneously reproduces the image at any time, so the number of users is rapidly increasing. Accordingly, users' demands for performance and functions are gradually increasing, and high performance and multifunctionalization are being pursued along with miniaturization, light weight, and low power consumption.

The electronic device may include a miniaturized image capturing apparatus. The electronic device may perform photographing in various light source environments (eg, low light, high light, or backlight), and may control settings of the image capturing apparatus based on various light source environments.

The electronic device may perform photographing by emitting a flash according to ambient illuminance. When shooting with a flash, when subjects with different distances are included in the image, if the distances of the subjects are not taken into account, exposure is optimized only for subjects at a specific distance, and overexposure or underexposure for the remaining subjects (under) exposure (eg cave effect) may occur.

According to various embodiments of the present disclosure, an electronic device acquires a plurality of images by adjusting the number of flashes, an intensity of light emission, or a light emission time of a flash according to a distance of subjects, and synthesizes the plurality of images to photograph an image having an optimized brightness would like to provide

An electronic device according to an embodiment disclosed herein may include a flash, a first camera device, a second camera device, and a processor operatively connected to the flash, the first camera device, and the second camera device. can The processor measures depth information corresponding to the first image based on a first image acquired through the first camera device and a second image acquired through the second camera device, and based on the depth information to determine an image synthesizing condition for acquiring the third images, the image synthesizing condition may include details related to an operation of the flash or the first camera device when the third images are acquired.

In addition, the electronic device according to an embodiment disclosed in this document may include a flash, a camera device, a depth measuring device, and a processor operatively connected to the flash, the camera device, and the depth measuring device. The processor obtains a first image obtained through the first camera device, measures depth information corresponding to the first image through the depth measurement device, and obtains second images based on the depth information The flash operation condition is set to determine the flash operation condition at the time of photographing for the purpose of capturing the second images.

According to the embodiments disclosed in this document, a plurality of images are obtained by adjusting the number of flashes, the intensity of flashes, or the flashing time according to the distance of the subjects, and an image having an optimized brightness is captured by synthesizing the plurality of images. can

In addition, various effects directly or indirectly identified through this document may be provided.

1 is a block diagram of an electronic device in a network environment according to various embodiments of the present disclosure;

2 is a diagram illustrating an electronic device according to an embodiment.

3 is a flowchart illustrating a photographing operation of an electronic device according to an exemplary embodiment.

4 is a diagram illustrating an example of a flash operation and a camera operation during multiple light emission according to an embodiment.

5 is a diagram illustrating another example of a flash operation and a camera operation during multiple light emission according to various embodiments of the present disclosure;

6 is a diagram illustrating an example of a flash operation and a camera operation during continuous light emission according to an embodiment.

7 is a diagram illustrating another example of a flash operation and a camera operation during continuous light emission according to various embodiments of the present disclosure;

8 is a diagram illustrating an additional function of a camera device according to an exemplary embodiment.

9 is a diagram illustrating an image synthesis process according to an exemplary embodiment.

In connection with the description of the drawings, the same or similar reference numerals may be used for the same or similar components.

Hereinafter, various embodiments of the present invention will be described with reference to the accompanying drawings. However, this is not intended to limit the present invention to specific embodiments, and it should be understood that various modifications, equivalents, and/or alternatives of the embodiments of the present invention are included.

1 is a block diagram of an electronic device 101 in a network environment 100 according to various embodiments of the present disclosure. Referring to FIG. 1 , in a network environment 100 , the electronic device 101 communicates with the electronic device 102 through a first network 198 (eg, a short-range wireless communication network) or a second network 199 . It may communicate with the electronic device 104 or the server 108 through (eg, a long-distance wireless communication network). According to an embodiment, the electronic device 101 may communicate with the electronic device 104 through the server 108 . According to an embodiment, the electronic device 101 includes a processor 120 , a memory 130 , an input device 150 , a sound output device 155 , a display device 160 , an audio module 170 , and a sensor module ( 176 , interface 177 , haptic module 179 , camera module 180 , power management module 188 , battery 189 , communication module 190 , subscriber identification module 196 , or antenna module 197 . ) may be included. In some embodiments, at least one of these components (eg, the display device 160 or the camera module 180 ) may be omitted or one or more other components may be added to the electronic device 101 . In some embodiments, some of these components may be implemented as a single integrated circuit. For example, the sensor module 176 (eg, a fingerprint sensor, an iris sensor, or an illuminance sensor) may be implemented while being embedded in the display device 160 (eg, a display).

The processor 120, for example, executes software (eg, the program 140) to execute at least one other component (eg, a hardware or software component) of the electronic device 101 connected to the processor 120 . It can control and perform various data processing or operations. According to an embodiment, as at least part of data processing or operation, the processor 120 converts commands or data received from other components (eg, the sensor module 176 or the communication module 190) to the volatile memory 132 . may be loaded into the volatile memory 132 , process commands or data stored in the volatile memory 132 , and store the resulting data in the non-volatile memory 134 . According to an embodiment, the processor 120 includes a main processor 121 (eg, a central processing unit or an application processor), and an auxiliary processor 123 (eg, a graphic processing unit or an image signal processor) that can be operated independently or together with the main processor 121 . , a sensor hub processor, or a communication processor). Additionally or alternatively, the auxiliary processor 123 may be configured to use less power than the main processor 121 or to be specialized for a designated function. The auxiliary processor 123 may be implemented separately from or as a part of the main processor 121 .

The auxiliary processor 123 may be, for example, on behalf of the main processor 121 while the main processor 121 is in an inactive (eg, sleep) state, or when the main processor 121 is active (eg, executing an application). ), together with the main processor 121, at least one of the components of the electronic device 101 (eg, the display device 160, the sensor module 176, or the communication module 190) It is possible to control at least some of the related functions or states. According to an embodiment, the auxiliary processor 123 (eg, an image signal processor or a communication processor) may be implemented as a part of another functionally related component (eg, the camera module 180 or the communication module 190). have.

The memory 130 may store various data used by at least one component (eg, the processor 120 or the sensor module 176 ) of the electronic device 101 . The data may include, for example, input data or output data for software (eg, the program 140 ) and instructions related thereto. The memory 130 may include a volatile memory 132 or a non-volatile memory 134 .

The program 140 may be stored as software in the memory 130 , and may include, for example, an operating system 142 , middleware 144 , or an application 146 .

The input device 150 may receive a command or data to be used by a component (eg, the processor 120 ) of the electronic device 101 from the outside (eg, 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 (eg, a stylus pen).

The sound output device 155 may output a sound signal to the outside of the electronic device 101 . The sound output device 155 may include, for example, a speaker or a receiver. The speaker can be used for general purposes such as multimedia playback or recording playback, and the receiver can be used to receive incoming calls. According to an embodiment, the receiver may be implemented separately from or as a part of the speaker.

The display device 160 may visually provide information to the outside (eg, a user) of the electronic device 101 . The display device 160 may include, for example, a display, a hologram device, or a projector and a control circuit for controlling the corresponding device. According to an embodiment, the display device 160 may include a touch circuitry configured to sense a touch or a sensor circuit (eg, a pressure sensor) configured to measure the intensity of a force generated by the touch. have.

The audio module 170 may convert a sound into an electric signal or, conversely, convert an electric signal into a sound. According to an embodiment, the audio module 170 acquires a sound through the input device 150 , or an external electronic device (eg, a sound output device 155 ) connected directly or wirelessly with the electronic device 101 . The electronic device 102) (eg, a speaker or headphones) may output a sound.

The sensor module 176 detects an operating state (eg, power or temperature) of the electronic device 101 or an external environmental state (eg, user state), and generates an electrical signal or data value corresponding to the sensed state. can do. According to an embodiment, the sensor module 176 may include, for example, a gesture sensor, a gyro sensor, a barometric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an IR (infrared) sensor, a biometric sensor, It may include a temperature sensor, a humidity sensor, or an illuminance sensor.

The interface 177 may support one or more specified protocols that may be used by the electronic device 101 to directly or wirelessly connect with an external electronic device (eg, the electronic device 102 ). According to an embodiment, the interface 177 may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, or an audio interface.

The connection terminal 178 may include a connector through which the electronic device 101 can be physically connected to an external electronic device (eg, the electronic device 102 ). According to an embodiment, the connection terminal 178 may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (eg, a headphone connector).

The haptic module 179 may convert an electrical signal into a mechanical stimulus (eg, vibration or movement) or an electrical stimulus that the user can perceive through tactile or kinesthetic sense. According to an embodiment, the haptic module 179 may include, for example, a motor, a piezoelectric element, or an electrical stimulation device.

The camera module 180 may capture still images and moving images. According to an embodiment, the camera module 180 may include one or more lenses, image sensors, image signal processors, or flashes.

The power management module 188 may manage power supplied to the electronic device 101 . According to an embodiment, the power management module 188 may be implemented as, for example, at least a part of 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 non-rechargeable primary cell, a rechargeable secondary cell, or a fuel cell.

The communication module 190 is a direct (eg, wired) communication channel or a wireless communication channel between the electronic device 101 and an external electronic device (eg, the electronic device 102, the electronic device 104, or the server 108). It can support establishment and communication through the established communication channel. The communication module 190 may include one or more communication processors that operate independently of the processor 120 (eg, an application processor) and support direct (eg, wired) communication or wireless communication. According to an embodiment, the communication module 190 is a wireless communication module 192 (eg, 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 (eg, : It may include a local area network (LAN) communication module, or a power line communication module). Among these communication modules, a corresponding communication module may be a first network 198 (eg, a short-range communication network such as Bluetooth, WiFi direct, or infrared data association (IrDA)) or a second network 199 (eg, a cellular network, the Internet, or It may communicate with the external electronic device 104 through a computer network (eg, a telecommunication network such as a LAN or WAN). These various types of communication modules may be integrated into one component (eg, a single chip) or may be implemented as a plurality of components (eg, multiple chips) separate from each other. The wireless communication module 192 uses subscriber information (eg, International Mobile Subscriber Identifier (IMSI)) stored in the subscriber identification module 196 within a communication network such as the first network 198 or the second network 199 . The electronic device 101 may be identified and authenticated.

The antenna module 197 may transmit or receive a signal or power to the outside (eg, an external electronic device). According to an embodiment, the antenna module 197 may include one antenna including a conductor formed on a substrate (eg, a PCB) or a radiator formed of a conductive pattern. According to an embodiment, the antenna module 197 may include a plurality of antennas. In this case, at least one antenna suitable for a communication method used in a communication network such as the first network 198 or the second network 199 is connected from the plurality of antennas by, for example, the communication module 190 . can be selected. A signal or power may be transmitted or received between the communication module 190 and an external electronic device through the selected at least one antenna. According to some embodiments, other components (eg, RFIC) other than the radiator may be additionally formed as a part of the antenna module 197 .

At least some of the components are connected to each other through a communication method between peripheral devices (eg, a bus, general purpose input and output (GPIO), serial peripheral interface (SPI), or mobile industry processor interface (MIPI)) and signal (eg commands or data) can be exchanged with each other.

According to an embodiment, the command or data may be transmitted or received between the electronic device 101 and the external electronic device 104 through the server 108 connected to the second network 199 . Each of the external electronic devices 102 and 104 may be the same as or different from the electronic device 101 . According to an embodiment, all or part of the operations performed by the electronic device 101 may be performed by one or more of the external electronic devices 102 , 104 , or 108 . For example, when the electronic device 101 needs to perform a function or service automatically or in response to a request from a user or other device, the electronic device 101 may perform the function or service itself instead of executing the function or service itself. Alternatively or additionally, one or more external electronic devices may be requested to perform at least a part of the function or the service. The one or more external electronic devices that have received the request may execute at least a part of the requested function or service, or an additional function or service related to the request, and transmit a result of the execution to the electronic device 101 . The electronic device 101 may process the result as it is or additionally and provide it as at least a part of a response to the request. For this purpose, for example, cloud computing, distributed computing, or client-server computing technology may be used.

2 is a diagram illustrating an electronic device according to an embodiment.

Referring to FIG. 2 , the electronic device 200 includes a processor 210 (eg, the processor 120 of FIG. 1 ), a display device 220 (eg, the display device 160 of FIG. 1 ), and a memory 230 . (eg, the memory 130 of FIG. 1 ), a first camera device 241 , a second camera device 242 , a flash 250 , or an illuminance sensor 260 . Alternatively, the electronic device 200 may additionally include a depth measuring device 243 . In an embodiment, at least one of the first camera device 241 and the second camera device 242 and the flash 250 are packaged in one package (or part) (eg, the camera module 180 of FIG. 1 ). may be included.

According to an embodiment, the processor 210 may execute a photographing related application (eg, a camera app). For example, the processor 210 may activate the first camera device 241 together with the execution of the photographing related application. The processor 210 may acquire a first image (eg, a preview image) through the first camera device 241 . The processor 210 may display the first image through the display device 220 . The first image may mean a preview shown to the user before the final photographing.

According to an embodiment, the processor 210 may determine whether a low-illuminance environment is present. For example, the processor 210 may measure the ambient illuminance of the electronic device 200 through the illuminance sensor 260 . If the measured ambient illuminance is greater than the specified reference illuminance value, the processor 210 may take a picture in the normal mode. When the measured ambient illuminance is equal to or less than the specified reference illuminance value, the processor 210 may measure depth information corresponding to the first image. For example, the processor 210 may activate the second camera device 242 and acquire an additional image for depth measurement through the second camera device 242 . The processor 210 may measure depth information (eg, a table including depth values of each part of the first image) corresponding to the first image by using the first image and the additional image. As another example, the processor 210 may measure depth information corresponding to the first image through the depth measuring device 243 .

According to an embodiment, the first camera device 241 and the second camera device 242 may be configured as dual stereo cameras for depth measurement. For example, the second camera device 242 may include the same or similar lens configuration as the first camera device 241 . The processor 210 is configured to determine depth information corresponding to the first image acquired by the first camera device 241 by using the viewpoint mismatch of the images acquired by the first camera device 241 and the second camera device 242 . can be obtained.

According to various embodiments, the processor 210 may measure the ambient illuminance of the electronic device 200 before acquiring the first image, and may determine whether a low illuminance environment exists.

According to an embodiment, the processor 210 may determine an image synthesis condition based on the depth information. For example, the processor 210 may determine the number of images to be synthesized during final photographing based on the depth information. Alternatively, the processor 210 may set a shooting condition for each of the composite images determined based on the depth information (eg, the number of exposures of the first camera device 241 , the exposure time, the number of flashes of the flash 250 , the light emission intensity, or the light emission time). ) can be determined.

According to an embodiment, the processor 210 may compare a background depth of the first image (eg, an average depth value of pixels in the background region of the first image) with a reference depth. For example, the processor 210 may extract a background component of the first image based on the depth information. The processor 210 may compare the background depth of the background component with the reference depth. If the background depth is equal to or greater than the reference depth, the processor 210 may determine to acquire a background image. If the background depth is smaller than the reference depth, the processor 210 may determine not to acquire the background image.

According to an embodiment, the processor 210 may determine whether there is an object having a change in depth in the first image. For example, the processor 210 may identify at least one object (eg, a subject) included in the first image. The processor 210 may continuously measure depth information corresponding to the first image. The processor 210 may determine whether there is an object having a change in depth in the first image based on the changed depth information.

According to an embodiment, when an object having a change in depth does not exist in the first image, the processor 210 may obtain additional second images by performing multiple flashes of the flash 250 . For example, the processor 210 may emit the flash 250 a plurality of times based on the determined image synthesis condition, and acquire the second images through the first camera device 241 while the flash 250 emits light. can The number of light emission and light emission intensity of the flash 250 may be determined based on the image synthesis condition. Alternatively, the number of exposures and exposure time of the first camera device 241 may be determined based on the image synthesis condition. According to various embodiments, when it is determined to acquire the background image, the processor 210 may emit a flash 250 for acquiring the background image and acquire the background image through the first camera device 241 . An image synthesis method through multiple light emission according to various embodiments will be described in detail with reference to FIGS. 4 and 5 .

According to an embodiment, when an object having a change in depth exists in the first image, the processor 210 may continuously emit the flash 250 to acquire additional second images. For example, the processor 210 emits the flash 250 for a specified period of time with a specified emission intensity based on the determined image synthesis condition, and uses the first camera device 241 while the flash 250 is emitted. 2 images can be acquired. The light emission intensity and the light emission time of the flash 250 may be determined based on the image synthesis conditions. Alternatively, the number of exposures and exposure time of the first camera device 241 may be determined based on the image synthesis condition. According to various embodiments, when it is determined to acquire the background image, the processor 210 may emit a flash 250 for acquiring the background image and acquire the background image through the first camera device 241 . An image synthesis method through continuous light emission according to various embodiments will be described in detail with reference to FIGS. 6 and 7 .

According to an embodiment, the processor 210 may obtain a third image (eg, a final image) by synthesizing the obtained second images. For example, the processor 210 may select a portion to be synthesized from each of the second images based on the depth information. For example, the processor 210 may select a first portion corresponding to a first object having a first depth from one of the second images. The processor 210 may select a second portion corresponding to a second object having a second depth from another one of the second images. The processor 210 may select a third portion corresponding to a third object having a third depth from another one of the second images. The processor 210 may generate a third image by synthesizing the first part, the second part, and the third part. As another example, the processor 210 may also synthesize the first image (eg, a portion corresponding to an object having a specified depth in the first image) with the second images. As another example, when a background image (eg, a background portion of the first image) is obtained, the processor 210 may also combine the background image with the second images. The processor 210 may display the third image resulting from the synthesis on the display device 220 . The processor 210 may store the third image in the memory 230 based on a user input.

3 is a flowchart illustrating a photographing operation of an electronic device according to an exemplary embodiment.

2 and 3 , the electronic device 200 determines the light emission conditions (eg, the number of flashes, the light emission intensity, or the light emission time) to obtain a plurality of images, and a final result may be displayed by synthesizing the obtained plurality of images.

According to an embodiment, in operation 305 , the processor 210 may execute a photographing related application (eg, a camera app). For example, the processor 210 may activate the first camera device 241 together with the execution of the photographing related application. The processor 210 may acquire a first image (eg, a preview image) through the first camera device 241 . The processor 210 may display the first image through the display device 220 . The first image may mean a preview shown to the user before the final photographing.

According to an embodiment, in operation 310, the processor 210 may determine whether there is a low-illuminance environment. For example, the processor 210 may measure the ambient illuminance of the electronic device 200 through the illuminance sensor 260 . If the measured ambient illuminance is greater than the specified reference illuminance value, the processor 210 determines that it is not a low illuminance environment (eg, No in operation 310), and performs operation 315 to photograph in the normal mode. If the measured ambient illuminance is less than or equal to the specified reference illuminance value, the processor 210 may determine that it is a low illuminance environment (eg, Yes in operation 310 ), and may perform operation 320 .

According to various embodiments, the processor 210 may measure the ambient illuminance of the electronic device 200 before acquiring the first image, and may determine whether a low illuminance environment exists.

According to an embodiment, in operation 315 , if the measured ambient illuminance is greater than the specified reference illuminance value, the processor 210 may perform imaging in a normal mode. For example, if the measured ambient illuminance is greater than the specified illuminance value, the processor 210 may set the first camera device 241 to a normal mode. For example, in the normal mode, the processor 210 may take a picture without the operation of the flash 250 . Alternatively, in the normal mode, the processor 120 may perform photographing without synthesizing a plurality of images.

According to an embodiment, in operation 320 , if the measured ambient illuminance is equal to or less than the specified reference illuminance value, the processor 210 may measure depth information corresponding to the first image. For example, the processor 210 may activate the second camera device 242 and acquire an additional image for depth measurement through the second camera device 242 . The processor 210 may measure depth information (eg, a table including depth values of each part of the first image) corresponding to the first image by using the first image and the additional image. As another example, the processor 210 may measure depth information corresponding to the first image through the depth measuring device 243 .

According to an embodiment, in operation 325, the processor 210 may determine an image synthesis condition based on the depth information. For example, the processor 210 may determine the number of images to be synthesized in operation 355 based on the depth information. Alternatively, the processor 210 may set a shooting condition for each of the composite images determined based on the depth information (eg, the number of exposures of the first camera device 241 , the exposure time, the number of flashes of the flash 250 , the light emission intensity, or the light emission time). ) can be determined.

For example, the intensity of light obtained from the image sensor of the first camera device 241 may be expressed as Equation (1).

In Equation 1, I may represent an intensity of light obtained from the image sensor of the first camera device 241 , S may represent a shutter speed, λ may represent a reflectance of a subject, and Am may represent an ambient light source. In certain circumstances, the reflectivity of the ambient light source and the subject is a fixed value, whereby the exposure can be controlled by controlling the shutter speed. For example, when the flash 250 emits light in a low-light situation, Equation 1 may be expressed as Equation 2.

In Equation 2, Li is the initial light emission amount of the flash 250 , and d may represent the distance between the subject and the first camera device 241 . In this case, the intensity of light obtained from the image sensor of the first camera device 241 is based on the distance between the subject and the first camera device 241 (eg, the square of the distance between the subject and the first camera device 241 ) inversely) can be determined. Subjects having the same reflectance may emit the same intensity of light when photographing under the same amount of light. However, when light is irradiated to the subject by a light source having the same directional irradiation characteristics as the flash 250 , the intensity of light from the subject varies rapidly according to the light emission position of the flash 250 and the distance of the subject. can have Therefore, if the distance of the subject is not taken into consideration when shooting after the flash 250 is emitted, exposure is optimized only for a subject at a specific distance, and over or under exposure for a subject located at a different distance from the specific distance. (eg cave effect) may occur. For example, when the first subject and the second subject located at different distances from the first camera device 241 exist, Equation 2 may be expressed as Equation 3 .

In Equation 3, S1 represents an appropriate shutter speed for the first subject, S2 represents an appropriate shutter speed for the second subject, and d1 represents the distance between the first camera device 241 and the first subject, Δ may represent a distance between the first subject and the second subject. According to the change of d1 and Δ, S1 and S2 can be determined. For example, based on Equation 3, when the first subject is 0.3 m away from the first camera device 241 and the second subject is 21 m away from the first subject, the first subject and the second subject are set with the same brightness. The shutter speed required to shoot can be S1*250 (eg, if S1 is 1/250s at proper exposure, S2 is 1s). In the case of the first camera device 241 having an appropriate exposure distance of 1.76 m when the flash 250 is emitted, if the minimum photographing distance is 30 cm, the processor 210 may determine the maximum number of composites to be 12.

According to an embodiment, in operation 330 , the processor 210 may compare the background depth and reference depth of the first image. For example, the processor 210 may extract a background component of the first image based on the depth information. For example, the processor 120 may exclude a component of at least one object (eg, a subject) having a specified depth value from the first image. The processor 120 may extract the background component from the first image by using the depth information of the at least one object. The processor 120 may calculate an appropriate exposure based on the background depth of the background component. The background depth may mean an average depth value of pixels corresponding to the background component. The processor 210 may compare the background depth with the reference depth. If the background depth is equal to or greater than the reference depth (eg, No in operation 330 ), in operation 335 , the processor 210 may determine to acquire a background image. When the background depth is equal to or greater than the reference depth, it may be necessary to calculate an appropriate exposure for capturing the background component. If the background depth is smaller than the reference depth (eg, Yes in operation 330 ), the processor 210 may determine not to acquire a background image and perform operation 340 . When the background depth is smaller than the reference depth, proper exposure of the background component may be satisfied only by exposure for the at least one object. For example, when the average value of gray levels for all regions of the first image is about 76 when the background component is not separated, the gray level of the background component of the first image may be about 46. The reference depth may be determined based on a gray level of the background component.

According to an embodiment, in operation 340, the processor 210 may determine whether there is an object having a change in depth in the first image. For example, the processor 210 may identify at least one object (eg, a subject) included in the first image. The processor 210 may continuously measure depth information corresponding to the first image. The processor 210 may determine whether there is an object having a change in depth in the first image based on the changed depth information. When there is no object having a change in depth in the first image (eg, No in operation 340 ), the processor 210 may perform operation 345 . When an object having a change in depth exists in the first image (eg, Yes in operation 340 ), the processor 210 may perform operation 350 . As an example, an object having a change in depth may include an object having a continuous surface according to an increase (or decrease) in depth. As another example, the object having a change in depth may include an object having a movement when photographing in a direction in which the depth increases (or decreases).

According to an embodiment, in operation 345 , if there is no object having a change in depth in the first image, the processor 210 may multi-emit the flash 250 to obtain additional second images. For example, the processor 210 emits the flash 250 a plurality of times based on the image synthesis condition determined in operation 325 , and uses the first camera device 241 to display the second image while the flash 250 emits light. can be obtained The number of light emission and light emission intensity of the flash 250 may be determined based on the image synthesis condition. Alternatively, the number of exposures and exposure time of the first camera device 241 may be determined based on the image synthesis condition. When it is determined to acquire the background image in operation 335 , the processor 210 may emit a flash 250 for acquiring the background image and acquire the background image through the first camera device 241 .

According to an embodiment, in operation 350 , when an object having a change in depth exists in the first image, the processor 210 may continuously emit the flash 250 to acquire additional second images. For example, the processor 210 emits the flash 250 for a specified time with a specified emission intensity based on the image synthesis condition determined in operation 325 , and operates the first camera device 241 while the flash 250 emits light. The second images may be acquired through The light emission intensity and the light emission time of the flash 250 may be determined based on the image synthesis conditions. Alternatively, the number of exposures and exposure time of the first camera device 241 may be determined based on the image synthesis condition. When it is determined to acquire the background image in operation 335 , the processor 210 may emit a flash 250 for acquiring the background image and acquire the background image through the first camera device 241 . For example, the light emission of the flash 250 for obtaining the background image may be included in the continuous light emission.

According to an embodiment, in operation 355, the processor 210 may obtain a third image (eg, a final image) by synthesizing the obtained second images. For example, the processor 210 may select a portion to be synthesized from each of the second images based on the depth information. For example, the processor 210 may select a first portion corresponding to a first object having a first depth from one of the second images. The processor 210 may select a second portion corresponding to a second object having a second depth from another one of the second images. The processor 210 may select a third portion corresponding to a third object having a third depth from another one of the second images. The processor 210 may generate a third image by synthesizing the first part, the second part, and the third part. As another example, the processor 210 may also synthesize the first image (eg, a portion corresponding to an object having a specified depth in the first image) with the second images. As another example, when a background image is obtained, the processor 210 may also combine the background image (eg, a background portion of the background image) with the second images. The processor 210 may display the third image resulting from the synthesis on the display device 220 . The processor 210 may store the third image in the memory 230 based on a user input.

4 is a diagram illustrating an example of a flash operation and a camera operation during multiple light emission according to an embodiment.

2 and 4 , the processor 210 may acquire second images through multiple light emission (eg, operation 345 of FIG. 3 ). For example, when there is no change in depth of at least one object included in a first image obtained when a photographing-related application is executed, the processor 210 may multi-emit the flash 250 .

According to an embodiment, the processor 210 may acquire the first image after executing a photographing related application. The processor 210 may display the first image through the display device 220 . For example, the first camera device 241 may acquire the first image through the first exposure 411 . The first exposure 411 may be performed without the operation of the flash 250 or with the first emission 401 . As an example, the first light emission 401 may be set to have a first intensity F41 and to last for a first time T41 .

According to an embodiment, the processor 210 may receive a user input related to the start of shooting (eg, click a shooting button). For example, the processor 210 may perform a series of operations related to photographing based on the user input (eg, determining an image synthesis condition according to depth, instructing the second light emission 421 to the fifth light emission 424 , and the second The exposure 431 to the fifth exposure 434 instruction, the sixth light emission 441 instruction, or the sixth exposure 451 instruction) may be performed. In another embodiment, the user input may be received before the first exposure 411 .

According to an embodiment, the processor 210 may acquire depth information corresponding to the first image before or after the first light emission 401 . For example, the processor 210 may determine an image synthesis condition based on the depth information. The image synthesis condition may include the number of flashes of the flash 250 , the duration of light emission, the intensity of light emission, or the number of exposures and the exposure time of the first camera device 241 .

According to an embodiment, the processor 210 may determine the number of times the flash 250 is emitted to obtain second images (eg, images for compositing) based on the depth information. For example, the number of times the flash 250 is emitted may be determined according to the number of objects having different depths included in the first image. As an example, the processor 210 may determine the second light emission 421 to the fifth light emission 424 . The processor 210 may set the light emission intensity of the second light emission 421 to the fifth light emission 424 to be the same (eg, set to the second intensity F42). The processor 210 may set the light emission time of the second light emission 421 to the fifth light emission 424 differently depending on the depth. For example, the second light emission 421 may be set to last for a second time period T42. The third light emission 422 may be set to last for a third time period T43 . The fourth light emission 423 may be set to last for a fourth time period T44. The fifth light emission 424 may be set to last for a fifth time period T45.

According to an embodiment, the processor 210 may determine the number of exposures and the exposure time of the first camera device 241 for acquiring the second images based on the depth information. For example, the number of exposures of the first camera device 241 may be set to be the same as the number of times of light emission of the flash 250 . The exposure time of the first camera device 241 may be determined according to a corresponding light emitting operation. As an example, the processor 210 may determine a second exposure 431 to a fifth exposure 434 . For example, the second exposure 431 may be set to last the same as the second light emission 421 or for a time shorter than the specified time (eg, the second time T42 ). The third exposure 432 may be set to last for a time equal to or smaller than the third light emission 422 (eg, the third time T43 ) by a specified time. The fourth exposure 433 may be set to last for a time equal to or smaller than a predetermined time (eg, the fourth time T44 ) as the fourth light emission 423 . The fifth exposure 434 may be set to last for a time equal to or less than a predetermined time (eg, a fifth time T45 ) as the fifth light emission 424 .

According to various embodiments, when the background image acquisition is determined (eg, operation 335 of FIG. 3 ), the processor 210 may selectively determine the sixth light emission 441 to acquire the background image. For example, the sixth light emission 441 may be set to last for a sixth time period T46. The sixth time T46 may be set longer than any one of the first time T41 to the fifth time T45. The processor 210 may set the sixth exposure 451 in response to the sixth light emission 441 . The sixth exposure 451 may be set to last for a time equal to or smaller than the sixth light emission 441 by a specified time (eg, the sixth time T46).

5 is a diagram illustrating another example of a flash operation and a camera operation during multiple light emission according to various embodiments of the present disclosure;

2 and 5 , the processor 210 may acquire second images through multiple light emission. For example, if there is no change in the depth of at least one object included in the first image obtained when the shooting-related application is executed (eg, operation 345 of FIG. 3 ), the processor 210 may perform multiple flashes of the flash 250 . can

According to an embodiment, the processor 210 may acquire the first image after executing a photographing related application. The processor 210 may display the first image through the display device 220 . For example, the first camera device 241 may acquire the first image through the first exposure 511 . The first exposure 511 may be performed without the operation of the flash 250 or with the first emission 501 . For example, the first light emission 501 may be set to have a first intensity F51 and to be continued for a first time period T51.

According to an embodiment, the processor 210 may receive a user input related to the start of shooting (eg, click a shooting button). For example, the processor 210 performs a series of operations related to photographing based on the user input (eg, determining an image synthesis condition according to depth, instructing the second light emission 521 to the fifth light emission 524 , and the second The exposure 531 to the fifth exposure 534 instruction, the sixth light emission 541 instruction, or the sixth exposure 551 instruction) may be performed. In another embodiment, the user input may be received before the first exposure 511 .

According to an embodiment, the processor 210 may acquire depth information corresponding to the first image before or after the first light emission 501 . For example, the processor 210 may determine an image synthesis condition based on the depth information. The image synthesis condition may include the number of flashes of the flash 250 , the duration of light emission, the intensity of light emission, or the number of exposures and the exposure time of the first camera device 241 .

According to an embodiment, the processor 210 may determine the number of times the flash 250 is emitted to obtain second images (eg, images for compositing) based on the depth information. For example, the number of times the flash 250 is emitted may be determined according to the number of objects having different depths included in the first image. For example, the processor 210 may determine the second light emission 521 to the fifth light emission 524 . The processor 210 may set the light emission time of the second light emission 521 to the fifth light emission 524 to be the same (eg, set to the second time period T52). The processor 210 may set the light emission intensity of the second light emission 521 to the fifth light emission 524 differently depending on the depth. For example, the second light emission 521 may be set to the second intensity F52 . The third light emission 522 may be set to the third intensity F53 . The fourth light emission 523 may be set to the fourth intensity F54 . The fifth light emission 524 may be set to a fifth intensity F55 .

According to an embodiment, the processor 210 may determine the number of exposures and the exposure time of the first camera device 241 for acquiring the second images based on the depth information. For example, the number of exposures of the first camera device 241 may be set to be the same as the number of times of light emission of the flash 250 . The exposure time of the first camera device 241 may be determined according to a corresponding light emitting operation. As an example, the processor 210 may determine a second exposure 531 to a fifth exposure 534 . For example, each of the second exposures 531 to 534 may be set to last for a time equal to or smaller than the second time T52 by a specified time.

According to various embodiments, when the background image acquisition is determined (eg, operation 335 of FIG. 3 ), the processor 210 may selectively determine the sixth light emission 541 to acquire the background image. For example, the sixth light emission 541 may be set to last for a third time period T53. The third time T53 may be set longer than any one of the first time T51 and the second time T52. The sixth light emission 541 may be set to have an intensity equal to or greater than the fifth intensity F55 . The processor 210 may set the sixth exposure 551 in response to the sixth light emission 541 . The sixth exposure 551 may be set to last for a time equal to or smaller than the sixth light emission 541 (eg, the third time T53 ) by a specified time.

6 is a diagram illustrating an example of a flash operation and a camera operation during continuous light emission according to an embodiment.

2 and 6 , the processor 210 may acquire second images through continuous light emission. For example, the processor 210 may continuously emit the flash 250 when there is a change in the depth of at least one object included in the first image obtained when the shooting-related application is executed (eg, operation 350 of FIG. 3 ). can

According to an embodiment, the processor 210 may acquire the first image after executing a photographing related application. The processor 210 may display the first image through the display device 220 . For example, the first camera device 241 may acquire the first image through the first exposure 611 . The first exposure 611 may be performed without the operation of the flash 250 or with the first emission 601 . For example, the first light emission 601 may be set to have a first intensity F61 and to last for a first time period T61.

According to an embodiment, the processor 210 may receive a user input related to the start of shooting (eg, click a shooting button). For example, the processor 210 performs a series of operations related to photographing based on the user input (eg, determining an image synthesis condition according to depth, instructing the second light emission 621 , and the second exposure 631 to fifth an exposure 634 instruction, a third light emission 641 instruction, or a sixth exposure 651 instruction) may be performed. In another embodiment, the user input may be received before the first exposure 611 .

According to an embodiment, the processor 210 may acquire depth information corresponding to the first image before or after the first light emission 601 . For example, the processor 210 may determine an image synthesis condition based on the depth information. The image synthesis condition may include the number of flashes of the flash 250 , the duration of light emission, the intensity of light emission, or the number of exposures and the exposure time of the first camera device 241 .

According to an embodiment, the processor 210 may determine the number of exposures and the exposure time of the first camera device 241 for acquiring second images (eg, images for compositing) based on the depth information. . For example, the number of exposures of the first camera device 241 may be determined according to the number of objects having different depths included in the first image. As an example, the processor 210 may determine a second exposure 631 to a fifth exposure 634 . For example, the second exposure 631 may be set to last for the fourth time T64. The third exposure 632 may be set to last for a fifth time T65. The fourth exposure 633 may be set to last for a sixth time period T66. The fifth exposure 634 may be set to last for the seventh time T67.

According to an embodiment, the processor 210 may determine an emission time of the flash 250 for acquiring the second images based on the depth information. For example, the processor 210 may set one continuous light emission (eg, the second light emission 621 ) to emit light for a specified time with a specified intensity based on the second exposure 631 to the fifth exposure 634 . have. For example, the processor 210 may determine that the second light emission 621 is performed while the second exposure 631 to the fifth exposure 634 of the first camera device 241 are in progress. For example, the second light emission 621 may be set to have a second intensity F62 and continue for a second time period T62.

According to various embodiments, when the background image acquisition is determined (eg, operation 335 of FIG. 3 ), the processor 210 may selectively determine the third light emission 641 to acquire the background image. For example, the third light emission 641 may be set to have a second intensity F62 and continue for a third time period T63. Alternatively, the third light emission 641 may be set to have an intensity greater than the second intensity F62 . The third time T63 may be set longer than any one of the first time T61 and the fourth time T64 to the seventh time T67. The processor 210 may set the sixth exposure 651 in response to the third light emission 641 . The sixth exposure 651 may be set to last for a time equal to or smaller than the third light emission 641 by a specified time (eg, the third time T63).

7 is a diagram illustrating another example of a flash operation and a camera operation during continuous light emission according to various embodiments of the present disclosure;

2 and 7 , the processor 210 may acquire second images through continuous light emission. For example, the processor 210 may continuously emit the flash 250 when there is a change in the depth of at least one object included in the first image obtained when the shooting-related application is executed (eg, operation 350 of FIG. 3 ). can

According to an embodiment, the processor 210 may acquire the first image after executing a photographing related application. The processor 210 may display the first image through the display device 220 . For example, the first camera device 241 may acquire the first image through the first exposure 711 . The first exposure 711 may be performed without the operation of the flash 250 or with the first light emission 701 . For example, the first light emission 701 may be set to have a first intensity F71 and to be continued for a first time period T71.

According to an embodiment, the processor 210 may receive a user input related to the start of shooting (eg, click a shooting button). For example, the processor 210 performs a series of operations related to photographing based on the user input (eg, determining an image synthesis condition according to depth, instructing the second light emission 721 , and second exposures 731 to 5 ). an exposure 734 instruction, a third light emission 741 instruction, or a sixth exposure 751 instruction) may be performed. In another embodiment, the user input may be received before the first exposure 711 .

According to an embodiment, the processor 210 may acquire depth information corresponding to the first image before or after the first light emission 701 . For example, the processor 210 may determine an image synthesis condition based on the depth information. The image synthesis condition may include the number of flashes of the flash 250 , the duration of light emission, the intensity of light emission, or the number of exposures and the exposure time of the first camera device 241 .

According to an embodiment, the processor 210 may determine the number of exposures and the exposure time of the first camera device 241 for acquiring second images (eg, images for compositing) based on the depth information. . For example, the number of exposures of the first camera device 241 may be determined according to the number of objects having different depths included in the first image. As an example, the processor 210 may determine a second exposure 731 to a fifth exposure 734 . For example, the second exposure 731 may be set to last for the fourth time T74. The third exposure 732 to the fifth exposure 734 may be set to last for the same time as the second exposure 731 .

According to an embodiment, the processor 210 may determine an emission time of the flash 250 for acquiring the second images based on the depth information. For example, the processor 210 may set one continuous light emission (eg, the second light emission 721 ) to emit light for a specified time with a specified intensity based on the second exposure 731 to the fifth exposure 734 . have. For example, the processor 210 may determine that the second light emission 621 is performed while the second exposure 731 to the fifth exposure 734 of the first camera device 241 are in progress. The second light emission 621 may have an intensity increasing from the second intensity F72 to the third intensity F73 and may be set to last for a second time period T72.

According to various embodiments, when it is determined to acquire the background image (eg, operation 335 of FIG. 3 ), the processor 210 may selectively determine the third light emission 741 to acquire the background image. For example, the third light emission 741 may be set to have a third intensity F73 and continue for a third time period T73. Alternatively, the third light emission 741 may be set to have an intensity greater than the third intensity F73 . The third time T73 may be set longer than any one of the first time T71 and the fourth time T74. The processor 210 may set the sixth exposure 751 in response to the third light emission 741 . The sixth exposure 751 may be set to last for a time equal to or smaller than the third light emission 741 by a specified time (eg, the third time T73 ).

8 is a diagram illustrating an additional function of a camera device according to an exemplary embodiment.

Referring to FIG. 8 , the electronic device 800 (eg, the electronic device 200 ) may provide an effect of changing the guide number GN of the flash 250 . For example, the electronic device 800 may display the user interface 801 of the photographing related application on a display device (eg, the display device 220 ). The user interface 801 may include an object (hereinafter, referred to as a guide number object) 810 for controlling the guide number GN. For example, the guide number GN may be a numerical value calculated by multiplying an aperture value and an illumination distance based on ISO 100, which is a sensitivity. The appropriate aperture value may be calculated by dividing the guide number GN by the distance between the flash 250 and an object to be photographed (eg, a subject). Alternatively, the shooting distance (eg, the distance of a subject having an appropriate exposure) may be calculated by dividing the guide number GN by the aperture value. As an example, the guide number object 810 may have a bar shape.

According to an embodiment, the guide number object 810 may include a control point 811 that is moved based on a user input. According to the movement of the control point 811 , the electronic device 800 may provide an effect of increasing or decreasing the guide number GN of the flash 250 . The electronic device 800 may provide an effect of increasing or decreasing the guide number GN of the flash 250 through the method of FIGS. 4 to 7 . For example, the physically fixed brightness of the flash 250 may be compensated by adjusting the shutter speed through the method of FIGS. 4 to 7 . The electronic device 800 applies the method of FIGS. 4 to 7 according to the user's adjustment of the control point 811 of the guide number object 810 to obtain the effect of virtually adjusting the intensity of the flash 250 . can provide

9 is a diagram illustrating an image synthesis process according to an exemplary embodiment.

2 to 7 and 9 , the electronic device 200 may obtain a final image 941 by synthesizing a plurality of images. For example, in the final image 941, objects included in the image may be expressed with appropriate brightness according to depth.

According to an embodiment, the electronic device 200 may acquire the first image 901 using or not using the flash 250 . The electronic device 200 may measure depth information of objects included in the first image 901 . The electronic device 200 determines various image synthesizing conditions (eg, the number of times the flash 250 emits light, the light emission time, the light emission intensity, or the number of exposures and the exposure time of the first camera device 241 ) based on the depth information. can The electronic device 200 may acquire a second image 911 and a third image 912 according to the image synthesis condition. This is an example, and the electronic device 200 may additionally acquire more images according to the image synthesis condition. The electronic device 200 may acquire the background image 931 if necessary. For example, the electronic device 200 may obtain a final image 941 by synthesizing the second image 911 and the third image 912 through the image synthesis method of FIGS. 3 to 7 . As another example, the electronic device 200 may obtain a final image 941 by synthesizing the first to third images 901 , 911 , and 912 through the image synthesis method of FIGS. 3 to 7 . As another example, the electronic device 200 may obtain a final image 941 by synthesizing the first to fourth images 901 , 911 , 912 , and 931 through the image synthesis method of FIGS. 3 to 7 . .

Electronic devices according to various embodiments disclosed in this document may be devices of various types. The electronic device may include, for example, a portable communication device (eg, a smart phone), a computer device, a portable multimedia device, a portable medical device, a camera, a wearable device, or a home appliance device. The electronic device according to the embodiment of this document is not limited to the above-described devices.

The various embodiments of this document and the terms used therein are not intended to limit the technical features described in this document to specific embodiments, and should be understood to include various modifications, equivalents, or substitutions of the embodiments. In connection with the description of the drawings, like reference numerals may be used for similar or related components. The singular form of the noun corresponding to the item may include one or more of the item, unless the relevant context clearly dictates otherwise. As used herein, "A or B", "at least one of A and B", "at least one of A or B", "A, B or C", "at least one of A, B and C", and "A , B, or C" each may include any one of the items listed together in the corresponding one of the phrases, or all possible combinations thereof. Terms such as “first”, “second”, or “first” or “second” may simply be used to distinguish the component from other such components, and refer to the component in another aspect (e.g., importance or order) is not limited. that one (e.g., first) component is "coupled" or "connected" to another (e.g., second) component with or without the terms "functionally" or "communicatively" When referenced, it means that one component can be connected to the other component directly (eg by wire), wirelessly, or through a third component.

As used herein, the term “module” may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with terms such as, for example, logic, logic block, component, or circuit. A module may be an integrally formed part or a minimum unit or a part of the part that performs one or more functions. For example, according to an embodiment, the module may be implemented in the form of an application-specific integrated circuit (ASIC).

According to various embodiments of the present document, one or more instructions stored in a storage medium (eg, the internal memory 136 or the external memory 138) readable by a machine (eg, the electronic device 101) may be implemented as software (eg, the program 140) including For example, the processor (eg, the processor 120 ) of the device (eg, the electronic device 101 ) may call at least one of one or more instructions stored from a storage medium and execute it. This makes it possible for the device to be operated to perform at least one function according to the at least one command called. The one or more instructions may include code generated by a compiler or code executable by an interpreter. The device-readable storage medium may be provided in the form of a non-transitory storage medium. Here, 'non-transitory' only means that the storage medium is a tangible device and does not contain a signal (eg, electromagnetic wave), and this term is used in cases where data is semi-permanently stored in the storage medium and It does not distinguish between temporary storage cases.

According to an embodiment, the method according to various embodiments disclosed in this document may be provided by being included in a computer program product. Computer program products may be traded between sellers and buyers as commodities. The computer program product is distributed in the form of a machine-readable storage medium (eg compact disc read only memory (CD-ROM)), or via an application store (eg Play Store™) or on two user devices ( It can be distributed (eg downloaded or uploaded) directly, online between smartphones (eg: smartphones). In the case of online distribution, at least a part of the computer program product may be temporarily stored or temporarily created in a machine-readable storage medium such as a memory of a server of a manufacturer, a server of an application store, or a relay server.

According to various embodiments, each component (eg, a module or a program) of the above-described components may include a singular or a plurality of entities. According to various embodiments, one or more components or operations among the above-described corresponding components may be omitted, or one or more other components or operations may be added. Alternatively or additionally, a plurality of components (eg, a module or a program) may be integrated into one component. In this case, the integrated component may perform one or more functions of each component of the plurality of components identically or similarly to those performed by the corresponding component among the plurality of components prior to the integration. . According to various embodiments, operations performed by a module, program, or other component are executed sequentially, in parallel, repeatedly, or heuristically, or one or more of the operations are executed in a different order, omitted, or , or one or more other operations may be added.

Claims (15)

1. In an electronic device,

   flash;

   a first camera device;

   a second camera device; and

   a processor operatively coupled to the flash, the first camera device, and the second camera device;

   The processor is

   Measuring depth information corresponding to the first image based on the first image acquired through the first camera device and the second image acquired through the second camera device,

   set to determine an image synthesis condition for obtaining third images based on the depth information,

   The image synthesis condition includes details related to an operation of the flash or the first camera device when the third images are acquired.
2. The method according to claim 1,

   It further comprises an illuminance sensor,

   The image synthesis conditions include the number of flashes, the intensity of light emission, the light emission time, or the number of exposures and the exposure time of the first camera device when the third images are acquired,

   The processor is

   The electronic device is configured to determine the image synthesis condition based on the depth information when the illuminance value measured by the illuminance sensor is equal to or less than a reference illuminance.
3. The method according to claim 1,

   The processor is

   detecting at least one object in the first image based on the depth information,

   The electronic device is configured to determine the number of exposures of the first camera device in response to the number of the at least one object.
4. 4. The method according to claim 3,

   The processor is

   The electronic device is configured to determine the number of times the flash is emitted according to the number of the at least one object when there is no object having a continuous surface according to the increase in depth among the at least one object.
5. 5. The method according to claim 4,

   The processor is

   The electronic device is set to set the light emission intensity differently for each light emission timing of the flash.
6. 4. The method according to claim 3,

   The processor is

   The electronic device is configured to acquire the third images while increasing the light emission intensity of the flash when an object having a continuous surface according to an increase in depth among the at least one object exists.
7. 4. The method according to claim 3,

   The processor is

   The electronic device is configured to acquire the third images while increasing the exposure time of the first camera device as the number of exposures increases when there is an object having a continuous surface according to an increase in depth among the at least one object.
8. 4. The method according to claim 3,

   The processor is

   and when an object having a continuous surface according to an increase in depth exists among the at least one object, the electronic device is configured to emit the flash once for a specified time with a specified intensity.
9. 9. The method of claim 8,

   The processor is

   The electronic device is set to acquire the third images by exposing the first camera device for a determined number of exposures during the specified time.
10. 10. The method of claim 9,

    The processor is

    It is set to acquire the third images while increasing the exposure time of the first camera device as the number of exposures increases,

    and a sum of exposure times of the first camera device is set to be smaller than the specified time.
11. 9. The method of claim 8,

    The processor is

    The electronic device is configured to acquire the third images while increasing the specified intensity.
12. The method according to claim 1,

    The processor is

    The electronic device is configured to select portions having a brightness in a specified range from the third images and synthesize the selected portions to generate a fourth image.
13. The method according to claim 1,

    The processor is

    extracting a background part based on the depth information,

    and when the depth of the background portion is greater than a reference depth, determine acquisition of a background image corresponding to the background portion.
14. 14. The method of claim 13,

    The processor is

    acquiring the background image according to the light emission intensity of the flash corresponding to the background part, the light emission time, and the exposure time of the first camera device;

    The electronic device is configured to generate a final image by synthesizing the third images and the background image.
15. In an electronic device,

    flash;

    camera device;

    depth measuring device; and

    a processor operatively coupled to the flash, the camera device and the depth measurement device;

    The processor is

    Obtaining a first image acquired through the first camera device,

    Measuring depth information corresponding to the first image through the depth measuring device,

    determining the flash operation condition when photographing to obtain second images based on the depth information,

    set to obtain a final image by synthesizing different parts of each of the second images obtained based on the flash operation condition;

    The flash operation condition includes the number of times the flash is emitted, the intensity of light emission, the light emission time, or the number of exposures and the exposure time of the camera device when the second images are acquired.

Images