TWI502268B - Photography guiding method and electronic device - Google Patents

Description

Photography guiding method and electronic device

The present invention relates to an image analysis technique, and more particularly to a photographing guide method and an electronic device.

In general, users may use a camera or a smart phone to take a self-portrait under certain circumstances (for example, when there is no one nearby). For example, a self-photograph or the like is performed using a lens of various photographic devices or a front lens of a smart phone.

However, for users who use a camera without a front lens, who are not willing to use the front lens for self-portraits (the front lens is usually poorly performing), or users who use the remote remote camera function, the common problem is I can't make the ideal picture smoothly. For example, in the case where it is impossible to know whether the user is currently in an ideal position in the photographing screen, it often causes the user's body part to be cut off in the photographed photograph, blocking a specific scenery or a poor photographing angle. .

In view of this, the present invention provides a photographing guiding method and an electronic device. It can effectively improve the problem that the user's body part is cut off, blocked by a specific landscape or poorly photographed.

The invention provides a photographing guiding method, which is suitable for an electronic device. The electronic device has a photographing unit for capturing a photographing image. The photographing guiding method comprises: determining a designated area in the photographing screen, wherein the size of the designated area is smaller than The size of the photographing screen; determining a target object in the photographing screen; and when the object object is not located in the designated area, generating a guiding signal according to a relative position of the object object and the designated area to guide the target object by the guiding signal Move to the specified area.

The invention further provides an electronic device comprising a photographing unit and a processing unit. The photographing unit is used to capture a photograph. The processing unit is coupled to the photographing unit for determining a designated area in the photographing screen and determining an object in the photographing screen, wherein the size of the designated area is smaller than the size of the photographing screen. When the target object is not located in the designated area, the processing unit generates a guiding signal according to a relative position of the target object and the designated area, so as to guide the target object to move into the designated area by the guiding signal.

Based on the above, the present invention provides a photographing guidance method and an electronic device that can determine one or more designated areas in a photographing screen. When the target object is beyond the designated area, a guiding signal is sent by voice or the like to guide the target to move into the designated area, thereby improving the body part of the user in the previously taken photo. Blocking specific landscapes or poorly photographed angles and other problems that are easily encountered during photography.

The above described features and advantages of the invention will be apparent from the following description.

10‧‧‧Electronic devices

11‧‧‧Photographic unit

12‧‧‧Processing unit

13‧‧‧Display unit

14‧‧‧ Input unit

15‧‧‧Voice output unit

16‧‧‧ storage unit

21, 31, 41‧ ‧ photographic pictures

22, 32, 45‧‧‧ designated areas

23, 33‧‧‧ users

44‧‧‧ background image

412, 414, 442, 444‧‧ reference points

S510, S520, S530‧‧‧ steps of the photographing guiding method according to an embodiment of the present invention

S602, S604, S606, S608, S610, S612, S614‧‧‧ steps of the photographing guiding method according to another embodiment of the present invention

FIG. 1 is a schematic diagram of an electronic device according to an embodiment of the invention.

2A, 2B, 2C, and 2D are schematic diagrams showing the movement of a guiding object into a designated area according to an embodiment of the invention.

3A, 3B, and 3C are schematic diagrams showing the guiding target moving into a designated area according to another embodiment of the present invention.

4A, 4B, and 4C are schematic diagrams of guiding a user's mobile electronic device to capture the same photographic image as the background image, according to an embodiment of the invention.

FIG. 5 is a flow chart of a photographing guiding method according to an embodiment of the invention.

FIG. 6 is a flowchart of a photographing guiding method according to another embodiment of the present invention.

FIG. 1 is a schematic diagram of an electronic device according to an embodiment of the invention. Referring to FIG. 1 , the electronic device 10 may be various types of electronic devices having a photographing function, such as a camera, a digital video, or a smart phone. The electronic device 10 includes at least a photographing unit 11 and a processing unit 12. The photographing unit 11 is a photographing module and is used to capture one Photography screen. For example, the photographing unit 11 may include main components in a general photographing module such as a lens or a photosensitive member. It is worth mentioning that the photographic picture mentioned here refers to the picture captured by the photographic unit 11 when the user focuses or looks for the object before pressing the shutter, instead of the user pressing the shutter. A photo actually taken by the photographing unit 11.

The processing unit 12 is coupled to the photographing unit 11, and the processing unit 12 is, for example, a variety of processors or controllers. The processing unit 12 can determine a designated area in the photographing picture from the photographing unit 11. In this embodiment, the size of the designated area may be smaller than (or equal to) the size of the photographic picture, depending on the needs of the user. In particular, the present invention can also adaptively adjust setting information such as the number, size, shape, and position of each designated area in the photographing screen in each photographing screen. For example, the electronic device 10 may further include a display unit 13 and an input unit 14. The processing unit 12 can display the photographic picture and the designated area captured by the photographic unit 11 on the screen of the display unit 13, wherein the designated area can be surrounded by visible or not visible lines. The input unit 14 may be a physical or virtual button, a remote controller, and/or a voice input device for receiving various input operations of the user. After the input unit 14 receives the input operation of the user, the processing unit 14 can determine the setting information of the designated area according to the input operation, that is, determine the number, size, shape, position of the designated area, the position in the photographic picture, and the like. Alternatively, the display unit 13 and the input unit 14 can also be combined into a touch screen, depending on practical needs.

Additionally, processing unit 12 may determine the object in the photographic screen. Photography The target in the face is, for example, a user of the electronic device 10 or a user who wants to appear at a specific position in the photographing screen, and the number of objects may be one or more. Further, the target can be locked to a certain part of the human body (for example, the face or upper body) or the whole body, depending on the needs. For example, the user can set the configuration of the target by the input unit 14 and define the basis for the processing unit 12 to recognize or search for the target from the photographic image. For example, if the user sets the definition of the target as the face or the upper body, the processing unit 12 can recognize the person's face or upper body as the target from the photographing screen when determining the target in the photographing screen. Alternatively, if the user sets the definition of the target as the whole body, the processing unit 12 can recognize the target of the whole body of the person as a whole from the photographing screen when determining the target in the photographing screen. The means for determining the target from the photographing screen can be achieved by various image processing means such as face recognition technology and human body recognition technology, and the present invention does not limit the specific implementation means.

Next, the processing unit 12 can determine whether the object in the photographing screen is located within the designated area. For example, the processing unit 12 can determine whether the face, the upper body, or the whole body of the user in the photographing screen is located within the designated area, depending on the above definition of the object. In the present embodiment, as long as the target object in the photographing screen is not completely located in the designated area, for example, a part of the target object (for example, a body part such as a face, a hand, a foot, etc.) exceeds the designated area, the processing unit 12 determines The target is not located in the specified area. Alternatively, in an embodiment, the processing unit 12 may also preset a threshold value. When the target object exceeds the threshold area, the processing unit 12 determines that the target object is not located in the designated area, thereby improving the practice. Operational flexibility.

When the processing unit 12 determines that the target object in the photographing picture is not located in the designated area, the processing unit 12 may generate a guiding signal according to the relative position of the target object and the designated area to guide the target object to move to the designated by the guiding signal. within the area. In this embodiment, the pilot signal is, for example, a voice pilot signal. For example, the electronic device 10 may include a voice output unit 15. The voice output unit 15 is, for example, various audio output devices such as a speaker and an earphone. The processing unit 12 can control the voice output unit 15 to output the voice guidance signal to guide the user (ie, the target object) in the photographic picture that exceeds the designated area to move into the designated area. Alternatively, the processing unit 12 can also wirelessly transmit the pilot signal to a remote device held by the user, thereby displaying a navigation message on the screen of the remote device to guide the user to move to a designated area, etc. The present invention does not limit the manner in which the pilot signals are embodied, and any embodiment that can be used as the pilot signal for the above purposes belongs to the scope of the embodiments of the present invention.

For example, FIG. 2A, FIG. 2B, FIG. 2C and FIG. 2D show that the guiding object moves to the designated according to an embodiment of the invention. Schematic diagram within the area. Referring to FIG. 2A, the user 23 can determine the designated area 22 in the photographing screen 21 through the input unit 14. In the present embodiment, although the designated area 22 is exemplified by a rectangle, it may be a geometric shape such as a circle or a shape defined by a user. For example, the touch screen combined with the display unit 13 and the input unit 14 can use the input tool such as a finger to draw various postures such as standing, sitting, kneeling, and/or lying posture on the touch screen. Corresponding specified area.

Referring to FIG. 2B, it is assumed that the target in the photographing screen 21 is defined as The whole body of the user 23. Since the first position of the user 23 in the photographing screen 21 exceeds the right border of the designated area 22, the processing unit 12 determines that the target object (ie, the user 23) in the photographing screen 21 is not located in the designated area 22, and The relative position of the target (i.e., user 23) to the designated area 22 generates a pilot signal to thereby guide the target (i.e., user 23) to move into the designated area 22. In particular, in the embodiment, the user 23 controls the electronic device 10 to perform self-photographing by placing the electronic device 10 in front of the electronic device 10, and the processing unit 12 can control the voice output unit 15 to output "please". Move to your right to a similar voice guidance signal to move the user 23 to the right.

Referring to FIG. 2C, after the user 23 follows the guiding signal to move the body to the right, if the user 23 is still beyond the range of the designated area 22, the processing unit 12 can continuously output the corresponding guiding signal to guide. The user 23 fully enters the designated area 22. Referring to FIG. 2D, after the user 23 has completely entered the designated area 22, the processing unit 12 can automatically send a shutter signal to the photographing unit 11 to perform the photographing function of the photographing unit 11. Alternatively, the processing unit 12 can also send a notification signal (for example, a voice notification signal such as "the target is already in the designated area" through the voice output unit 15) to inform the user 23 that there is no need to move again, and a preset After the time (for example, 3 seconds), the shutter signal and the like are sent out, and the flexibility can be flexibly adjusted according to actual needs.

In addition, taking a self-photograph by the user holding the electronic device 10 and pointing the lens of the electronic device 10 to itself, FIG. 3A, FIG. 3B and FIG. 3C are diagrams showing the movement of the guiding object according to another embodiment of the present invention. A schematic to the specified area. Referring to FIG. 3A, the user 33 can determine the designated area 32 in the photographing screen 31 through the input unit 14. Similar to the previous embodiment, although the designated area 32 is exemplified by a rectangle, it may be a geometric shape such as a circle or a user-defined shape. In particular, in the present embodiment, the target is defined as the face of the user 33.

Referring to FIG. 3B, when the processing unit 12 determines that the target object in the photographing screen 31 (ie, the face of the user 33) is not located in the designated area 32, the processing unit 12 may be based on the target (ie, the user 33). The relative position of the face to the designated area 32 generates a pilot signal for guiding the target (i.e., the face of the user 33) to move into the designated area 32 by the pilot signal. In this embodiment, since the user self-photographs the lens of the electronic device 10 by itself in a handheld manner, the processing unit 12 can control the voice output unit 15 to output "Please take the lens of the electronic device 10 to your left. Rotate or "move your head to your right" and other similar voice guidance signals to allow the user to rotate the lens of the electronic device 10 to the left or the user to move its head to the right. Referring to FIG. 3C, after the target object (ie, the head of the user 33) is completely located in the designated area 33, the processing unit 12 can automatically send the shutter signal to the photographing unit 11 to perform the photographing function of the photographing unit 11, or issue The notification signal informs the user 23 that there is no need to move any more, and the shutter signal and the like are sent after a preset time (for example, 3 seconds), and the adjustment can be flexibly adjusted according to the actual demand.

Still further, the electronic device 10 may further include a storage unit 16. The storage unit 16 is, for example, an internal memory of the electronic device 10 or an external storage medium (for example, Recalling a card or USB flash drive, etc., and can be used to store various types of identification information such as one or more specified facial features. The identification information can be used to identify the specified target in the photographic image from the photographic unit 11. For example, the processing unit 12 can learn, by using the face recognition technology, that the currently captured photographic image has more than one candidate target (for example, one or more people including the user), and obtain each candidate target. Candidate facial features. The processing unit 12 can then compare the acquired candidate facial features with one of the storage storage units 16 to specify facial features, such as facial features of the user currently using the electronic device 10 for photography. Next, the processing unit 12 may select, as the selected target object, the candidate target having the same facial feature as the designated facial feature in the candidate target identified in the captured image, and select the selected target with the previously set designated region. Make an association. After the association between the target object and the designated area is generated, the processing unit 12 can perform the subsequent guiding operation of determining whether the target object is located in the designated area or the like according to the association.

Further, the present invention does not limit the number of associations of the target with the designated area. For example, when taking a group photo of a plurality of people, the processing unit 12 may determine a plurality of designated areas (eg, according to an input operation of the user), and recognize a plurality of specified objects from the currently captured photographic pictures (eg, Every target is a person). The manner in which the specified target is recognized may be achieved by using a face recognition technique to compare a plurality of candidate facial features with a plurality of designated facial features in the storage unit 16. Then, the processing unit 12 can associate each of the acquired objects with a designated area, and then perform subsequent navigation operations on the objects to determine whether the objects are located in the corresponding designated areas.

In particular, in one embodiment, the user can predetermine the number of designated areas and/or objects. Then, the processing unit 12 can determine whether the number of objects determined from the photographic picture is equal to the preset number. If the number of objects is not equal to the preset number, it means that some people may be blocked or not enter the mirror due to other factors, so the processing unit 12 can control the voice output unit 15 to output "Please pay attention to whether or not there is a mirror" or the like. Guide signal. Alternatively, the processing unit 12 may also determine whether the number of objects is equal to the number of designated areas. If the number of objects is not equal to the number of designated areas (for example, the number of objects is small), the processing unit 12 may find that the slave storage unit 16 does not appear on the photographic screen according to the relationship between each designated area and the target. The name or nickname of the target object, and the voice output unit 15 is controlled to output a voice guidance signal such as "Please adjust the position of Wang Xiaoming (ie, the name or nickname of the user who does not appear on the photographic screen)" to inform A user who does not appear on the photographic screen adjusts its photographing position.

Alternatively, in an embodiment, in order to recognize a specified target from the photographic image (for example, identifying a specified target from a plurality of candidate objects), the processing unit 12 may also output a recognized voice through the voice output unit 16. And selecting, in the candidate target, the candidate target that performs the behavior corresponding to the recognized speech as the specified target, and associating the specified target with the designated area. For example, the processing unit 12 can output an identification voice with action information such as "Please let your head shake left and right" or "Please wave your hands" through the voice output unit 16. Then, the processing unit 12 can set a candidate object that performs an action of "swinging the head to the left or right" or "swinging the hand" as a designated target object, and the specified target object and the previously set target object. The area is associated. After the association between the target object and the designated area is generated, the processing unit 12 can perform the subsequent guiding operation of determining whether the target object is located in the designated area or the like according to the association.

Moreover, in one embodiment, in addition to making the user performing the self-portrait appear in a desired position in the photo, the present invention can also make the background in the photo conform to the requirements of the user. For example, the processing unit 12 may also obtain a background image from the storage unit 16 before determining the designated area on the photographic screen, wherein the background image is an image previously captured by the user, and It includes information of a specified area preset by the user, for example, the number, size, shape of the designated area, and the position of the designated area in the background image, and the like. Next, after the photographing unit 16 captures the current photographing screen, the processing unit 12 can determine whether the photographing screen and the background image are the same. When the photographic image is different from the background image, the processing unit 12 can generate a guiding signal according to the relative position of the photographic image and the background image, so as to guide the user to move the electronic device 10 to capture the background. The same photographic image as the image.

For example, FIG. 4A and FIG. 4B are schematic diagrams of guiding a user mobile electronic device to capture the same photographic image as the background image, according to an embodiment of the invention. Referring to FIG. 4A , the user photographs the background image 44 using the electronic device 10 in advance, determines the designated area 45 on the background image 44 , and stores the background image 44 in the storage unit 16 . After reading the background image 44 from the storage unit 16, the processing unit 12 may determine more than one first reference point on the background image 44 and record the first position of the first reference point on the background image 44. And its corresponding first map Like features. In the present embodiment, the first reference point is, for example, the reference point 442 and the reference point 444, and as shown in FIG. 4A, the first image feature corresponding to the reference point 442 is a "tree", and the reference point 444 corresponds to the first. The image feature is "House."

Referring to FIG. 4B, after determining the first position of the first reference point on the background image 44 and its corresponding first image feature, the processing unit 12 may search for the first picture on the photographic frame 41 from the photographic unit 11. A second image feature having the same or similar image features (eg, "tree" corresponding to the search reference point 442 and "house" corresponding to the reference point 444). After searching for the second image feature, processing unit 12 may determine a second reference point on photographic image 41 based on the second location of the second image feature on photographic image 41. In the present embodiment, the second reference point is, for example, a reference point 412 and a reference point 414, and corresponds to a "tree" and a "house" corresponding to the reference point 414 and the reference point 414, respectively.

After determining the second reference point on the photographing screen 41, the processing unit 12 determines the relative position of the photographing screen 41 and the background image 44 by comparing the relative positions of the first reference point and the second reference point, and according to the photographing screen. The relative position of the background image 44 produces a pilot signal. For example, the processing unit 12 can control the voice output unit 15 to output a similar voice guidance signal, such as “turn the lens of the electronic device 10 to your left side”, to guide the user to rotate the lens of the electronic device 10 to the left side thereof. Thereby, the photographing screen 41 from the photographing unit 11 is adjusted to be the same as the background image 44.

When the processing unit 12 determines that the first reference point and the second reference point are located at the same position or overlap, it indicates that the user has taken the camera unit 11 according to the pilot signal. The photographing screen 41 is adjusted to be the same as the background image 44, and the processing unit 12 can determine the designated area in the photographing screen based on the information of the designated area 45 included in the background image, and perform the above-described determination of the target object and the judgment target in the photographing screen. Whether it is located in the designated area and other subsequent guiding operations, so as to effectively capture the background with the user's favorite background without the assistance of the outsider and the user is in the ideal position in the photo (for example, does not block the specific scenery, etc.) Photo.

Moreover, in an embodiment, the above-described embodiments are also applicable to a usage scenario in which one person helps another person to take a photo. 4A and 4B, it is assumed that user A is a photographer and user B is a photographer. The user B can take the favorite background image 44 of the electronic device 10 in advance and set the designated area 45 on the background image 44. Next, referring to FIG. 4C, the processing unit 12 can simultaneously display the background image 44 and the photographic screen 41 on the screen of the display unit 13. For example, the background image 44 and the photographing screen 41 are respectively displayed on the left and right sides of the screen. Alternatively, the processing unit 12 may also display the background image 44 and the photographic screen 41, for example, display the background image 44 with a higher transparency, and display the photographic image 41 with a lower transparency, etc., facilitating the user. A aligns the background image 44 with the photographic screen 41. In addition, the processing unit 12 may simultaneously display the first reference point on the background image 44 and the second reference point on the photographic screen 41, or may output a voice guide generated according to the relative position of the photographic image 41 and the background image 44. Signal.

Then, the user A can adjust the photographing angle and/or direction of the electronic device 10 by comparing the background image 44 with the photographing screen 41 or according to the voice guidance signal, thereby capturing the same photographing screen 41 as the background image 44. . Then, when processing the order After the element 12 determines that the photographing screen 41 is the same as the background image 44, the processing unit 12 can switch the screen of the display unit 13 to display only the current photographing screen, so that the user A can indicate according to the designated area 45 preset by the user B. The user B (i.e., the target) moves into the designated area 45, or the processing unit 12 controls the voice output unit 15 to output the voice guidance signal to guide the user B (i.e., the target) to move into the designated area or the like.

FIG. 5 is a flow chart of a photographing guiding method according to an embodiment of the invention. Referring to FIG. 1 and FIG. 5 simultaneously, in step S510, the processing unit 12 determines the designated area in the photographing picture from the photographing unit 11, wherein the size of the designated area is smaller than the size of the photographing screen. In step S520, the processing unit 12 determines the target in the photographing screen. The present invention does not limit the order of execution of steps S510 and S520. Next, in step S530, when the target object is not located in the designated area, the processing unit 12 may generate a guiding signal according to a relative position of the target object and the designated area, so as to guide the target object to move to the designated by the guiding signal. within the area.

Further, FIG. 6 is a flowchart of a photographing guiding method according to another embodiment of the present invention. Referring to FIG. 1 and FIG. 6 simultaneously, in step S602, the processing unit 12 can obtain a background image. Next, in step S604, the processing unit 12 can determine whether the background image is identical to the photographing picture from the photographing unit 11. If the background image is different from the photographing image from the photographing unit 11, in step S606, the processing unit 12 may generate a first guiding signal according to the relative position of the photographing screen and the background image, thereby using the first guiding The signal guides the user to move the electronic device to capture the same photographic picture as the background image, and repeats the steps after step S606 S604. In addition, if the background image is the same as the photographing screen from the photographing unit 11, in step S608, the processing unit 12 may determine a designated area in the photographing screen according to the information of the designated area in the background image, and in step S610. The processing unit 12 can determine the object in the photographic picture. Next, in step S612, the processing unit 12 may determine whether the target is located within the designated area. If the target object is not located in the designated area, the processing unit 12 may generate a second guiding signal according to the relative position of the target object and the designated area, so that the second guiding signal guides the target object to move into the designated area, and Step S612 is repeatedly performed after step S614. In addition, if the target object is already located in the designated area, the processing unit 12 can perform a function such as automatic photographing after step S612, and the guide photographing method of the present embodiment ends here.

The detailed implementation of each step of the photographing and guiding method in the embodiment of the present invention has been described in detail in the above embodiments, and thus will not be described again.

In summary, the present invention provides a photographic guidance method and an electronic device that can determine one or more designated areas in a photographic picture. When the captured object exceeds the designated area, a guiding signal is sent by voice or the like to guide the target to move into the designated area. In addition, the present invention can also guide the user to obtain a photographic image having the same background image according to a background image that the user likes, and guide the user to move to a predetermined position thereof, thereby greatly improving the user. The convenience of self-timer, and effectively improve the problems that are easily encountered during the photography process in which the user's body part is cut off, blocked by a specific scenery, or the photographing angle is poor.

Although the present invention has been disclosed above by way of example, it is not intended to limit the present invention. The scope of the present invention is defined by the scope of the appended claims, which are defined by the scope of the appended claims, without departing from the spirit and scope of the invention. quasi.

S510, S520, S530‧‧‧ steps of the photographing guiding method of the present invention

Claims (8)

A photographing guiding method is applicable to an electronic device having a photographing unit for capturing a photographing image, the method comprising: determining a designated area in the photographing screen, wherein the designated area has a size smaller than the photographing screen a size; determining an object in the photographic image; when the object is not located in the designated area, generating a first guiding signal according to a first relative position of the target and the designated area, by The first guiding signal guides the target to move into the designated area, wherein the step of determining the designated area in the photographic picture comprises: receiving an input operation through an input unit of the electronic device; and operating according to the input One or a combination of the number, size, shape, and location of the designated area in the photographic picture is determined. The photographic guidance method of claim 1, wherein the determining the target in the photographic image comprises: acquiring at least one candidate facial feature of at least one candidate target in the photographic image; a candidate facial feature and a specified facial feature stored in a storage unit of the electronic device; and a candidate target having the same facial feature as the designated facial feature in the at least one candidate target as the target, and The target is associated with the designated area. The photographing guiding method according to claim 1, wherein the determining the object in the photographing screen comprises: determining at least one candidate object in the photographing screen; and transmitting a voice output unit of the electronic device And outputting a recognized speech; and selecting, as the target, a candidate target that performs the behavior corresponding to the recognized speech in the at least one candidate target, and associating the target with the designated area. The photographing and guiding method of claim 1, further comprising: obtaining a background image from a storage unit of the electronic device, wherein the background image includes information of the designated area; determining the photographing screen and the Whether the background image is the same; and when the photographic image is not the same as the background image, generating a second guiding signal according to the second relative position of the photographic image and the background image, by using the second guiding The locating signal guides a user to move the electronic device to capture the same photographic image as the background image, wherein the step of determining the designated area in the photographic image comprises: determining the designated area according to the information of the designated area In the photographic picture. An electronic device includes: a photographing unit for capturing a photographing image; an input unit for receiving an input operation; and a processing unit coupled to the photographing unit, wherein the processing unit is configured to determine a designated area In the photographing screen, an object in the photographing screen is determined, wherein the size of the designated area is smaller than the size of the photographing screen, When the target object is not located in the designated area, the processing unit generates a first guiding signal according to a relative position of the target object and the designated area, to guide the target object by using the first guiding signal. Moving to the designated area, wherein the processing unit further determines one or a combination of the number, size, shape, and location of the designated area in the photographic picture according to the input operation. The electronic device of claim 5, further comprising: a storage unit coupled to the processing unit for storing a specified facial feature, wherein the processing unit obtains at least one candidate target in the photographic image a candidate facial feature, the target object having the same facial feature as the specified facial feature in the at least one candidate target is compared to the at least one candidate facial feature and the specified facial feature, and the target is The object is associated with the designated area. The electronic device of claim 5, further comprising: a voice output unit coupled to the processing unit for outputting a preset voice, wherein the processing unit determines at least one candidate target in the photographic image And selecting, in the at least one candidate object, a candidate target that performs the behavior corresponding to the preset voice as the target, and associating the target with the designated area. The electronic device of claim 5, further comprising: a storage unit coupled to the processing unit for storing a background image, wherein the background image includes information of the designated area; and wherein the processing The unit further obtains the background image from the storage unit and determines the Whether the photographic image is the same as the background image, wherein when the photographic image is the same as the background image, the processing unit generates a second guiding signal according to the second relative position of the photographic image and the background image, And guiding, by the second guiding signal, a user to move the electronic device to capture the same photographic image as the background image, wherein the processing unit determines the designated region in the photographic image according to the information of the designated region .