Abstract:
A method for taking image of face which is executable on an electronic device requires a speaker and a camera. An activation of the camera is detected and the speaker is controlled to emit sound from an audio file to draw attention of a target. If the face of the target is not facing the camera for a predetermined duration, a volume of the emitted sound is increased or another audio file replaces the currently played audio file and the camera is triggered to take an image of the target when the target is fully facing the camera.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application claims priority to Taiwanese Patent Application No. 104102443 filed on Jan. 26, 2015, the contents of which are incorporated by reference herein. 
     FIELD 
     The subject matter herein generally relates to photography technology, and particularly to a method and an electronic device for taking image of a face with high quality. 
     BACKGROUND 
     A camera can be used for taking images. However, the image effect is not very ideal when a target does not face the camera. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Many aspects of the disclosure can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the disclosure. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views. 
         FIG. 1  is a block diagram of one embodiment of an electronic device. 
         FIG. 2  is a block diagram of one embodiment of function modules of a photographing system in the electronic device in  FIG. 1 . 
         FIG. 3  illustrates a flowchart of one embodiment of a method for taking image of a face. 
     
    
    
     DETAILED DESCRIPTION 
     It will be appreciated that for simplicity and clarity of illustration, where appropriate, reference numerals have been repeated among the different figures to indicate corresponding or analogous elements. In addition, numerous specific details are set forth in order to provide a thorough understanding of the embodiments described herein. However, it will be understood by those of ordinary skill in the art that the embodiments described herein can be practiced without these specific details. In other instances, methods, procedures, and components have not been described in detail so as not to obscure the related relevant feature being described. Also, the description is not to be considered as limiting the scope of the embodiments described herein. The drawings are not necessarily to scale and the proportions of certain parts may be exaggerated to better illustrate details and features of the present disclosure. 
     The disclosure, referring to the accompanying drawings, is illustrated by way of examples and not by way of limitation. It should be noted that references to “an” or “one” embodiment in this disclosure are not necessarily to the same embodiment, and such references mean “at least one”. 
     Furthermore, the term “module”, as used herein, refers to logic embodied in hardware or firmware, or to a collection of software instructions, written in a programming language, such as, Java, C, or assembly. One or more software instructions in the modules can be embedded in firmware, such as in an EPROM. The modules described herein can be implemented as either software and/or hardware modules and can be stored in any type of non-transitory computer-readable medium or other storage device. Some non-limiting examples of non-transitory computer-readable media include CDs, DVDs, BLU-RAY, flash memory, and hard disk drives. The term “comprising” means “of, but not necessarily limited to”; it specifically indicates open-ended inclusion or membership in a so-described combination, group, series and the like. 
       FIG. 1  illustrates a block diagram of one embodiment of an electronic device. In at least one embodiment as shown in  FIG. 1 , an electronic device  1  includes, but is not limited to, a photographing system  2 , a storage device  10 , at least one processor  12 , a camera  14 , and a speaker  18 . The electronic device  1  can be a smart phone, a tablet computer, a camcorder, a video recorder, a digital camera, or any other suitable electronic device.  FIG. 1  illustrates only one example of the electronic device  1  that can include more or fewer components than illustrated, or have a different configuration of the various components in other embodiments. 
     In at least one embodiment, the storage device  10  can include various types of non-transitory computer-readable storage medium. For example, the storage device  10  can be an internal storage system, such as a flash memory, a random access memory (RAM) for temporary storage of information, and/or a read-only memory (ROM) for permanent storage of information. The storage device  10  can also be an external storage system, such as a hard disk, a storage card, or a data storage medium. 
     In at least one embodiment, the at least one processor  12  can be a central processing unit (CPU), a microprocessor, or other data processing chip that performs functions of the photographing system  2  in the electronic device  1 . 
     In at least one embodiment, the camera  14  can be placed on the electronic device  1 , or suspended from the electronic device  1 . The camera  14  can be used to capture an image of a target. 
     In at least one embodiment, the speaker  18  can be placed on a shell of the electronic device  1 , and can be used for emitting sound from an audio file when receiving a control signal from the at least one processor  12 . 
       FIG. 2  is a block diagram of one embodiment of function modules of the photographing system. In at least one embodiment, the photographing system  2  can include a predetermination module  20 , a detection module  22 , a control module  24 , a determination module  26 , and an acquiring module  28 . In some embodiments, the control module  24  can comprise a first control module  240 , and a second control module  242 . The function modules can include computerized codes in the form of one or more programs, which are stored in the storage device  10  of the electronic device  1 . The at least one processor  12  executes the computerized codes to provide functions of the function modules. 
     The predetermination module  20  can predetermine at least one audio file in the storage device  10  of the electronic device  1 . In some embodiments, the at least one audio file can comprise: “Harvest turnips”, “Two tigers”, “Several ducks”, voices of people, or any other sound that can draw attention of the target. In some embodiments, the at least one audio file can be downloaded from the Internet. 
     The detection module  22  can detect whether the camera  14  of the electronic device  1  is activated. After a determination is made that the camera  14  is activated, the camera  14  can capture an image of the target. 
     In some embodiments, if the electronic device  1  is a smart phone or a tablet computer, the camera  14  can be activated by pressing a camera icon displayed on a touch screen (not shown) of the electronic device  1 . In some embodiments, if the electronic device  1  is a camcorder, a video recorder, or a digital camera, the camera  14  can be activated by pressing a button on the electronic device  1 . In some embodiments, a focal length of the camera  14  can be zoomed in/zoomed out. 
     The first control module  240  can control the speaker  18  to emit sound from an audio file stored in the storage device  10 . 
     The second control module  242  can control the speaker  18  to increase a volume of the emitted sound, or replace audio file with another audio file, when a face of the target is not detected by the camera  14  within a predetermined time (e.g., three seconds) from the detected activation of the camera  14 . An increase to the volume of the audio file will not hurt the ears of the target. 
     In first embodiment, the second control module  242  can control the speaker  18  to increase a volume of the emitted sound according to a predetermined relationship between distances to the target from the camera  14 . For example, when a distance to the target from the camera  14  is three meters, the second control module  242  can control the volume of the emitted sound to increase three decibels. When a distance to the target from the camera  14  is five meters, the second control module  242  can control the volume of the emitted sound to increase five decibels. 
     In second embodiment, the second control module  242  can control the volume of the emitted sound to increase by a predetermined value (e.g., three decibels). 
     In third embodiment, the second control module  242  can control the speaker  18  to play another audio file. For example, the speaker  18  can replace the “Two tigers” currently playing with the “Several ducks”. 
     In fourth embodiment, the second control module  242  can control the electronic device  1  to emit flash. A range of frequency of the flash is 2-5 hertz. 
     The determination module  26  can detect whether the face of the target is facing the camera  14  for a predetermined duration of time (e.g., three seconds). 
     Specifically, the determination module  26  can capture a face of the target, and recognize whether the captured face is square-on to the camera  14  or is showing a side or profile of the face, according to face recognition technology. In some embodiments, when a determination is made that the captured face is square-on, the target can be regarded as facing the camera  14 . In some embodiments, when a determination is made that the presented face is a side of the face, the target can be regarded as not facing the camera  14 . Face recognition technology is very well known and is not described here. 
     The acquiring module  28  can trigger the camera  14  to take an image of the face of the target and store the image in the storage device  10  when the face of the target is square-on to the camera  14 . 
     Referring to  FIG. 3 , a flowchart is presented in accordance with an example embodiment. The example method  300  is provided by way of example, as there are a variety of ways to carry out the method. The example method  300  described below can be carried out using the configurations illustrated in  FIG. 1  and  FIG. 2 , for example, and various elements of these figures are referenced in explaining example method  300 . Each block shown in  FIG. 3  represents one or more processes, methods, or subroutines, carried out in the example method  300 . Additionally, the illustrated order of blocks is by example only and the order of the blocks can be changed. The example method  300  can begin at block  31 . Depending on the embodiment, additional blocks can be added, others removed, and the ordering of the blocks can be changed. 
     At block  31 , a predetermination module predetermines at least one audio file in the storage device of the electronic device. 
     At block  32 , the camera detects an activation of the camera of the electronic device. 
     At block  33 , a first control module controls the speaker  18  to emit sound from an audio file stored in the storage device. 
     At block  34 , a determination module determines whether a face of the target is squarely facing the camera for a predetermined duration of time. If the face of a target is not squarely facing the camera for the predetermined duration, the procedure goes to block  35 . If the face of a target is squarely facing the camera  14  for the predetermined duration, the procedure goes to block  37 . 
     At block  35 , a second control module controls the speaker  18  to increase a volume of the emitted sound or replace the audio file being currently played with another audio file. 
     At block  36 , the determination module again determines whether the face of a target is squarely facing the camera  14  for the predetermined duration. If the face of a target is not squarely facing the camera  14  for the predetermined duration, the procedure returns to block  35 . If the face of a target is squarely facing the camera  14  for the predetermined duration, the procedure goes to block  37 . 
     At block  37 , a acquiring module triggers the camera  14  to take an image of face of the target and store the image in the storage device  10 . 
     It should be emphasized that the above-described embodiments of the present disclosure, and of any particular embodiments, are merely possible examples of implementations, set forth for a clear understanding of the principles of the disclosure. Many variations and modifications can be made to the above-described embodiment(s) of the disclosure without departing substantially from the spirit and principles of the disclosure. All such modifications and variations are intended to be included within the scope of this disclosure and protected by the following claims.