CN113542597B - Focusing method and electronic device - Google Patents
Focusing method and electronic device Download PDFInfo
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- CN113542597B CN113542597B CN202110745835.XA CN202110745835A CN113542597B CN 113542597 B CN113542597 B CN 113542597B CN 202110745835 A CN202110745835 A CN 202110745835A CN 113542597 B CN113542597 B CN 113542597B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/67—Focus control based on electronic image sensor signals
- H04N23/671—Focus control based on electronic image sensor signals in combination with active ranging signals, e.g. using light or sound signals emitted toward objects
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/18—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using ultrasonic, sonic, or infrasonic waves
- G01S5/22—Position of source determined by co-ordinating a plurality of position lines defined by path-difference measurements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The embodiment of the application discloses a focusing method and electronic equipment. The electronic device comprises an audio acquisition device, and the method comprises the following steps: acquiring position information of target equipment according to ultrasonic signals received by the plurality of audio acquisition devices, wherein the target equipment is equipment for transmitting the ultrasonic signals; and focusing the shooting object at the target equipment according to the position information. Therefore, after the shooting object carries the target equipment capable of transmitting the ultrasonic signals, the electronic equipment serving as the shooting equipment can position the target equipment according to the received ultrasonic signals, so that the shooting object carrying the target equipment is positioned, and further, the electronic equipment is assisted to perform better continuous focusing on the shooting object by utilizing the space positioning capability of a plurality of microphones of the electronic equipment and the excellent propagation distance and positioning precision of ultrasonic waves, so that defocusing is avoided.
Description
Technical Field
The present application relates to the field of image acquisition, and more particularly, to a focusing method and an electronic device.
Background
During image acquisition, a particular object within the image acquisition region may typically be focused. However, the related focusing method has a problem that the focusing cannot be continued well.
Disclosure of Invention
In view of the above, the present application provides a focusing method and an electronic device to improve the above-mentioned problems.
In a first aspect, the present application provides a focusing method applied to an electronic device, where the electronic device includes an audio acquisition device, the method includes: acquiring position information of target equipment according to ultrasonic signals received by the plurality of audio acquisition devices, wherein the target equipment is equipment for transmitting the ultrasonic signals; and focusing the shooting object at the target equipment according to the position information.
In a second aspect, the present application provides an electronic device, the electronic device including a processor, a camera, and an audio acquisition apparatus, the audio acquisition apparatus including a plurality of audio acquisition devices; the camera is used for shooting images; the plurality of audio acquisition devices are used for acquiring ultrasonic signals; the processor is used for executing the method.
In a third aspect, the present application provides a computer readable storage medium having program code stored therein, wherein the method described above is performed when the program code is run.
According to the focusing method and the electronic device, after the shooting object carries the target device capable of transmitting the ultrasonic signals, the electronic device serving as the shooting device can position the target device according to the received ultrasonic signals, so that the shooting object carrying the target device is positioned, and further, the electronic device is assisted to perform better continuous focusing on the shooting object by utilizing the space positioning capability of multiple microphones of the electronic device and excellent transmission distance and positioning accuracy of ultrasonic waves, so that defocusing is avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 shows a schematic diagram of an application scenario of a focusing method according to the present application;
FIG. 2 is a flowchart of a focusing method according to an embodiment of the present application;
FIG. 3 is a flowchart of a focusing method according to another embodiment of the present application;
FIG. 4 is a schematic diagram of an objective function set up in an embodiment of the application;
FIG. 5 is a schematic diagram showing orientation information of a target device relative to an electronic device according to an embodiment of the present application;
FIG. 6 is a schematic diagram of a hint information corresponding to location information according to embodiments of the present application;
FIG. 7 is a schematic diagram of another hint information corresponding to position information according to embodiments of the present application;
FIG. 8 is a flowchart of a focusing method according to still another embodiment of the present application;
FIG. 9 is a flowchart of a focusing method according to another embodiment of the present application;
FIG. 10 is a flowchart of a focusing method according to another embodiment of the present application;
fig. 11 shows a block diagram of a configuration of an electronic device for performing a focusing method according to an embodiment of the present application;
fig. 12 shows a block diagram of another electronic device for performing a focusing method according to an embodiment of the present application;
fig. 13 shows a storage unit for storing or carrying program codes for implementing a focusing method according to an embodiment of the present application in real time.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
During image acquisition, a specific object in an image acquisition area can be focused, so that the specific object can be imaged clearly.
However, the inventors found in the study that the related focusing method still had a problem that the focusing could not be continued well. For example, in such a system that the subject is a person and focuses on the face, defocus tends to occur when the face of the subject is blocked or the moving speed of the subject is too high. For another example, in such a manner that a specific subject is manually and automatically focused, a complicated high-end apparatus is required, and depending on experience of the operation of a photographer, the operator is greatly dependent.
Therefore, the inventor proposes a focusing method and an electronic device according to the present application, which can acquire, after an audio acquisition device receives an ultrasonic signal, position information of a target device serving as an ultrasonic signal source according to the ultrasonic signal, and focus a shooting object at the target device according to the position information. Therefore, after the shooting object carries the target equipment capable of transmitting the ultrasonic signals, the electronic equipment serving as the shooting equipment can position the target equipment according to the received ultrasonic signals, so that the shooting object carrying the target equipment is positioned, and further, the electronic equipment is assisted to perform better continuous focusing on the shooting object by utilizing the space positioning capability of a plurality of microphones of the electronic equipment and the excellent propagation distance and positioning precision of ultrasonic waves, so that defocusing is avoided.
The following describes a scenario related to an embodiment of the present application.
As shown in fig. 1, the scenario shown in fig. 1 includes an electronic device 100 and an electronic device 200. Wherein the electronic device 200 may emit an ultrasonic signal of a set frequency. The setting frequency may be a default setting frequency of the electronic device 200 itself before shipment, a setting frequency configured by a user by operating the electronic device 200, or a setting frequency carried in an instruction transmitted by another electronic device (for example, the electronic device 100) received by the electronic device 200.
The electronic device 100 is configured with an audio capturing device, so that the electronic device 100 can receive an ultrasonic signal emitted by an external device. For example, an ultrasonic signal transmitted by the electronic device 200 may be received. Then in the shooting scenario shown in fig. 1, the electronic device 200 that can transmit an ultrasonic signal may be carried by the user (shooting object) on the left side in fig. 1, and the electronic device 100 held by the user on the right side may acquire the position information of the target device (for example, the electronic device 200 in fig. 1) according to the ultrasonic signal if the electronic device 100 receives the ultrasonic signal. In the case that the positions of the electronic device 200 and the user carrying the electronic device 200 are the same, the electronic device 100 may determine the position information of the user carrying the target device at the same time when acquiring the position information of the target device, so that the electronic device 100 may implement focusing on the user carrying the target device according to the acquired position information.
In the embodiment of the present application, the position where the electronic device 200 that emits the ultrasonic signal is placed when in use is not limited in the embodiment of the present application. Can be held by a user in addition to being placed inside and outside the pocket of the garment as shown in fig. 1.
Embodiments of the present application will be described in detail below with reference to the accompanying drawings.
Referring to fig. 2, the focusing method provided by the embodiment of the application is applied to an electronic device, the audio acquisition device includes a plurality of audio acquisition devices, and the method includes:
s110: and acquiring the position information of target equipment according to the ultrasonic signals received by the plurality of audio acquisition devices, wherein the target equipment is equipment for transmitting the ultrasonic signals.
Wherein the ultrasonic signal is an acoustic signal having a frequency above a specified value. For example, it may be an acoustic signal above 20000 Hz. After receiving the sound wave signal, the audio acquisition device of the electronic equipment can detect the frequency of the received ultrasonic wave signal, so as to determine whether the ultrasonic wave signal is received. After determining that an ultrasonic signal is received, determining positional information of a transmitting source, which may then be understood as a target device transmitting the ultrasonic signal, based on the received ultrasonic signal may begin.
S120: and focusing the shooting object at the target equipment according to the position information.
In the embodiment of the present application, the target device is a device carried by the shooting object, and after determining the position information of the target device, the electronic device may determine the position information of the position where the shooting object is located, so as to focus the shooting object by obtaining the obtained position information.
As one way, the location information includes a distance between a target device and an electronic device, and focusing a shooting object at the target device according to the location information includes: determining focusing parameters according to the distance between the target equipment and the electronic equipment; and adjusting the focal length of a camera of the electronic equipment according to the focusing parameters so as to be used for focusing a shooting object at the target equipment. It should be noted that, the electronic device photographs the photographed object through its own camera, and if the electronic device needs to adjust the focal length during focusing, the focal length of the camera is adjusted. Therefore, in the case where the acquired position information includes the distance between the target device and the electronic device, the electronic device can adjust the focal length of the camera according to the distance, thereby achieving focusing on the photographic subject at the target device.
Alternatively, in the embodiment of the present application, a correspondence relationship between a distance and a focal length may be established in advance, where the distance in the correspondence relationship is a distance between a target device (a device that emits an ultrasonic signal) and an electronic device, or may be understood as a distance between a photographic subject and the electronic device. In the process of focusing, whether the focus is adjusted currently or not can be determined according to the corresponding relation between the distance and the focus so as to realize focusing on the shooting object. In the process of shooting by the electronic device, the distance between the shooting object and the electronic device may change. For example, if the subject is in motion all the time during photographing, the distance between the subject and the electronic device may dynamically change due to instability of the speed of motion or problems of the motion path. The electronic device obtains the distance between the shooting object and the electronic device, and the distance is different from the distance based on the previous focusing, so that the distance between the shooting object and the electronic device is determined to be changed, and the focusing is determined to be needed. Correspondingly, if the distance between the shooting object and the electronic equipment is obtained and is the same as the distance based on the previous focusing, the focusing is determined not to be needed.
For example, if the obtained distance between the target device and the electronic device is d1 and the focal length determined according to the corresponding relationship between the distance and the focal length is f1, the electronic device may adjust the focal length of the camera to be f1, so as to focus the shooting object at the target device. If the distance between the target device and the electronic device acquired by the electronic device again is still d1, the distance d1 is determined to be the same as the distance d1 based on which focusing was performed last time, and the electronic device keeps the focal length determined last time, that is, does not trigger the operation of actually performing focal length change. If the distance between the target device and the electronic device acquired by the electronic device again is d2, the distance d1 based on the distance is determined to be different from the distance d1 based on the previous focusing, and the electronic device acquires the adaptive focal length again based on the corresponding relation between the distance and the focal length. For example, if the focal length adapted to the distance d2 is f2, the focal length of the camera is adjusted to be f2, so as to achieve focusing on the shooting object at the target device.
According to the focusing method provided by the embodiment, after the ultrasonic signal is received by the audio acquisition device, the position information of the target equipment serving as the ultrasonic signal source is acquired according to the ultrasonic signal, and the shooting object at the target equipment is focused according to the position information. Therefore, after the shooting object carries the target equipment capable of transmitting the ultrasonic signals, the electronic equipment serving as the shooting equipment can position the target equipment according to the received ultrasonic signals, so that the shooting object carrying the target equipment is positioned, and further, the electronic equipment is assisted to perform better continuous focusing on the shooting object by utilizing the space positioning capability of a plurality of microphones of the electronic equipment and the excellent propagation distance and positioning precision of ultrasonic waves, so that defocusing is avoided.
Referring to fig. 3, the focusing method provided by the embodiment of the application is applied to an electronic device, the audio acquisition device includes a plurality of audio acquisition devices, the plurality of audio acquisition devices are disposed at different positions of the electronic device, and the method includes:
s210: and acquiring the position information of target equipment according to the ultrasonic signals received by the plurality of audio acquisition devices, wherein the target equipment is equipment for transmitting the ultrasonic signals.
S220: and acquiring the phase difference and the amplitude difference between the ultrasonic signals received by any two audio acquisition devices in the ultrasonic signals received by the audio acquisition devices.
S230: and obtaining the position information of the target equipment according to the phase difference and the amplitude difference.
Before the details of the present embodiment are specifically discussed, the details related to determining the location information of the target device in the present embodiment will be described.
In this embodiment, a spatial coordinate system may be established in advance with the electronic device itself as the origin of coordinates. A sound source device may then be placed around the electronic device, which may emit an ultrasonic signal. When the sound source device is placed, at least one sound source device can be placed in each quadrant of the established space coordinate system, so that the direction sources of the ultrasonic signals acquired by the electronic device are richer. Illustratively, as shown in fig. 4, the x-axis, y-axis, and z-axis are included in the established spatial coordinate system, and the electronic device is located at the origin of the x-axis, y-axis, and z-axis.
The audio collection device of the electronic device may include a plurality of audio collection devices, and the positions of the audio collection devices on the electronic device may be different, so that even the audio signals sent by the same sound source device have different amplitudes and phases when transmitted to the audio collection devices.
Alternatively, the plurality of audio collection devices may be spatially distributed. For example, if the electronic device includes three audio capture devices, one of the audio capture devices may be on top of the front side of the electronic device, another of the audio capture devices may be on the bottom of the electronic device, and the remaining one of the audio capture devices may be on top of the front side of the electronic device. Furthermore, the three audio acquisition devices can be arranged at different positions on the same surface of the electronic equipment. For example, one of the audio collection devices is at the top of the front face, the other is at the bottom of the front face, and the remaining one can be between the other two.
After the space coordinate system is established, each sound source device can be controlled to emit ultrasonic signals one by one, and the electronic device records the amplitude and the phase of the ultrasonic signals emitted by each sound source device reaching each audio acquisition device. And then, acquiring the amplitude difference and the phase difference of ultrasonic signals transmitted by the same sound source device and acquired by any two audio acquisition devices in the audio signals acquired by each audio acquisition device.
For example, referring to fig. 4, the plurality of audio capturing devices of the electronic apparatus includes an audio capturing device 10, an audio capturing device 11, and an audio capturing device 12. The sound source devices are set up to include a sound source device s1, a sound source device s2, a sound source device s3, a sound source device s4, a sound source device s5, a sound source device s6, a sound source device s7, and a sound source device s8. Taking the sound source device s1 as an example, in the process of transmitting the ultrasonic wave signal by the sound source device s1, the ultrasonic wave signal transmitted by the sound source device s1 is collected by the audio collecting device 10, the audio collecting device 11 and the audio collecting device 12. Wherein, the amplitude of the ultrasonic signal emitted by the sound source device s1 acquired by the audio acquisition device 10 is q1, and the phase is p1. The sound source device s1 collected by the audio collection device 11 emits an ultrasonic signal with the amplitude of q2 and the phase of p2. The sound source device s1 collected by the audio collection device 12 emits an ultrasonic signal with an amplitude q3 and a phase p3. Then in the process of calculating the phase difference and the amplitude difference, the difference between q1 and q2, the difference between q1 and q3, and the difference between q2 and q3 are calculated as the amplitude difference corresponding to the sound source device s1, and the difference between p1 and p2, the difference between p1 and p3, and the difference between p2 and p3 are calculated as the phase difference corresponding to the sound source device s1, so as to obtain the amplitude difference and the phase difference corresponding to the sound source device s 1.
Similarly, the amplitude difference and the phase difference corresponding to the sound source device s1, the amplitude difference and the phase difference corresponding to the sound source device s2, the amplitude difference and the phase difference corresponding to the sound source device s3, the amplitude difference and the phase difference corresponding to the sound source device s4, the amplitude difference and the phase difference corresponding to the sound source device s5, the amplitude difference and the phase difference corresponding to the sound source device s6, the amplitude difference and the phase difference corresponding to the sound source device s7, and the amplitude difference and the phase difference corresponding to the sound source device s8 may be obtained, respectively, based on the same manner. Because the spatial position of each sound source device is known, after the amplitude difference and the phase difference corresponding to each sound source device are obtained, the corresponding relation between a plurality of groups of position information and the phase difference as well as the amplitude difference can be obtained, and then the functional relation for obtaining the corresponding relation between the characterization position information and the phase difference as well as the amplitude difference can be established according to the corresponding relation.
The function for obtaining the corresponding relation between the characterization position information and the phase difference and the amplitude difference may include a function for fitting the corresponding relation between the characterization position information and the phase difference and the amplitude difference. The fitting method may include a least square curve fitting method.
It should be noted that the number of sound source devices and the positions of the sound source devices shown in fig. 4 are exemplary, the number of sound source devices may be more than 8, and the number of sound source devices may be increased or decreased according to specific requirements. Again, the number and location of the audio acquisition devices shown in fig. 4 are exemplary.
It should be noted that, in the present embodiment, when the audio capturing device of the electronic apparatus includes a plurality of audio capturing devices, in the process of determining the position information, the position of the target apparatus is determined based on the ultrasonic signals commonly captured by the plurality of audio capturing devices. As one way, the obtaining the location information of the target device according to the phase difference and the amplitude difference includes: obtaining the position information of the target equipment according to the phase difference, the amplitude difference and a pre-established target function; the objective function is used for representing the phase difference and the corresponding relation between the amplitude difference and the position information. The objective function may be a function of the correspondence relationship between the characterization position information and the phase difference and the amplitude difference, which is set up in the foregoing description in conjunction with fig. 4.
It will be appreciated that in the case where the audio capturing device of the electronic apparatus has a plurality of audio capturing devices, in the case where it is determined that the ultrasonic signal is received, the plurality of audio capturing devices all receive the ultrasonic signal, respectively. The electronic device can acquire the amplitude and phase of the ultrasonic signal acquired by each of its own plurality of audio acquisition devices. And then the phase difference and the amplitude difference between the ultrasonic signals received by any two audio acquisition devices can be calculated, and then the position information of the target equipment can be determined by combining the objective functions of the characterization position information, the phase difference and the amplitude difference.
It should be noted that, in the embodiment of the present application, the number of the plurality of audio capturing devices may be two. In the case that the audio acquisition device of the electronic apparatus includes two audio acquisition devices, the functional relationship of the correspondence relationship between the characterization position information and the phase difference and the amplitude difference may also be established based on the foregoing manner corresponding to fig. 4. In the process of actually determining the position information, the electronic equipment can acquire and obtain the phase and the amplitude of the ultrasonic signals acquired by the two audio acquisition devices respectively, and further acquire and obtain the phase difference and the amplitude difference of the ultrasonic signals acquired by the two audio acquisition devices respectively, so that the position information corresponding to the phase difference and the amplitude difference is acquired according to the functional relation.
For example, if the plurality of audio collection devices include a first audio collection device and a second audio collection device, in determining the position information, the electronic device may obtain the amplitude and the phase of the ultrasonic signal collected by the first audio collection device, obtain the amplitude and the phase of the ultrasonic signal collected by the second audio collection device, then obtain the difference between the amplitude of the ultrasonic signal collected by the first audio collection device and the amplitude of the ultrasonic signal collected by the second audio collection device, obtain the amplitude difference, obtain the difference between the phase of the ultrasonic signal collected by the first audio collection device and the phase of the ultrasonic signal collected by the second audio collection device, obtain the phase difference, and further obtain the corresponding position information according to the obtained phase difference and the obtained amplitude difference.
As one way, the audio acquisition device may be a microphone, or may also be an ultrasonic transducer. Wherein the ultrasonic transducer may convert an ultrasonic signal into a sensor of other energy signals (e.g., electrical signals).
In one mode, the image capturing device of the electronic device itself cannot rotate, and in this case, if the electronic device itself does not rotate, the capturing range of the camera is fixed. In another way, the camera itself can rotate independently, so that in this way, even if the electronic device itself does not rotate, the camera itself can rotate, thereby changing the acquisition range of the camera. In the case that the rotation condition of the camera itself is various, the specific content of the position information obtained according to the amplitude difference and the phase difference in the embodiment of the present application may also be various.
As one case, the distance between the target device and the electronic device may be included in the location information. In this case the electronic device will focus directly on the distance between the target device and the electronic device. The focusing method according to the distance between the target device and the electronic device may be referred to in the foregoing embodiment, which is not described in detail in this embodiment.
Alternatively, the location information may include a distance between the target device and the electronic device, and further include location information of the target device relative to the electronic device. The azimuth information can be understood as the relative angle of the target device with respect to the front extending direction of the electronic device, and further can be understood as the relative angle of the shooting object at the target device with respect to the front extending direction of the electronic device. For example, as shown in fig. 5, the front extending direction of the electronic device is shown in the drawing, and the front extending direction can be understood as the direction in which the front of the electronic device faces, and then the relative angle between the shooting object and the front extending direction of the electronic device is ω shown in fig. 5.
The electronic device may obtain the angle at which the camera needs to rotate when the shooting object at the target device needs to be moved to the specified position of the screen acquired by the camera if the position information further includes azimuth information. In this case, the electronic device may determine whether the acquisition range of the camera of the electronic device needs to be changed according to the azimuth information in the determined location information, and if the acquisition range of the camera needs to be changed, change the acquisition range of the camera based on the azimuth information, so that the shooting object may move to a specified location of the image acquired by the camera. After the rotation operation to be performed is completed, the electronic device determines a corresponding focal length based on the distance between the target device and the electronic device included in the position information, and then focuses based on the focal length.
In the embodiment of the application, the acquisition range of the camera can be changed in a plurality of ways.
As a way, if the camera of the electronic device supports rotation, the electronic device may control the rotation of the camera based on the azimuth information, so as to change the acquisition range of the camera, so that the shooting object may move to a specified position of the image acquired by the camera.
In another way, if the camera of the electronic device does not support rotation, the electronic device may further display a prompt message in the display screen according to the azimuth information, so as to prompt the user to rotate the electronic device, so as to change the acquisition range of the camera. Optionally, the prompt information may be text content whose content corresponds to the azimuth information, where the text content may prompt the user to rotate the electronic device. For example, as shown in fig. 6, if the azimuth information indicates that the photographic subject is located on the left side of the electronic device and has exceeded the capture range of the camera, in order to enable the photographic subject to be located in the middle of the screen captured by the camera, the electronic device may display text content whose content is "mobile electronic device to the left". Furthermore, optionally, the prompt information may be an identifier that prompts the user to rotate the electronic device in a specified direction. For example, the identification may be an arrow. For example, as shown in fig. 7, if the azimuth information indicates that the photographic subject is located on the left side of the electronic device and has exceeded the capture range of the camera, the electronic device may display an arrow pointing to the left side of the electronic device until the photographic subject is in a middle position of the image captured by the camera.
As one way, obtaining the position information of the target device according to the phase difference and the amplitude difference includes: and determining whether the camera of the electronic equipment supports rotation, and if the camera does not support rotation, obtaining the position information of the target equipment according to the phase difference and the amplitude difference, wherein the obtained position information of the target equipment only comprises the distance between the target equipment and the electronic equipment. If the camera supports rotation, the obtained position information of the target device may include the distance between the target device and the electronic device and the azimuth information of the target device (shooting object) relative to the electronic device according to the phase difference and the amplitude difference.
In this embodiment, the specific description of the content identical to that of the other embodiments may be referred to the other embodiments, and the description is not repeated in this embodiment.
According to the focusing method provided by the embodiment, after the shooting object carries the target equipment capable of transmitting the ultrasonic signals, the electronic equipment serving as the shooting equipment can position the target equipment according to the received ultrasonic signals, so that the shooting object carrying the target equipment is positioned, and further, the electronic equipment is assisted to perform better continuous focusing on the shooting object by utilizing the space positioning capability of multiple microphones of the electronic equipment and the excellent propagation distance and positioning precision of ultrasonic waves, so that defocusing is avoided. In addition, in the embodiment, the electronic device determines the position information of the target device according to the pre-established objective function representing the phase difference and the corresponding relation between the amplitude difference and the position information, thereby improving the accuracy of obtaining the position information of the target device and being beneficial to focusing the shooting object more accurately and continuously.
Referring to fig. 8, the focusing method provided by the embodiment of the application is applied to an electronic device, the audio acquisition device includes a plurality of audio acquisition devices, and the method includes:
s310: and filtering the audio signals in the first appointed frequency range in the ultrasonic signals received by the plurality of audio acquisition devices to obtain filtered ultrasonic signals.
Wherein, in an embodiment of the present application, the first specified frequency range characterizes a frequency range where the frequency of the ultrasonic signal transmitted by the target device does not exist. And then after the audio signal in the first appointed frequency range in the received ultrasonic signals is filtered, the signals except the ultrasonic signals transmitted by the target equipment carried in the ultrasonic signals after the filtering can be greatly reduced, so that the signal-to-noise ratio of the ultrasonic signals transmitted by the target equipment is improved, and the accuracy of the position information obtained by subsequent calculation is improved. Alternatively, the first specified frequency range may include a corresponding frequency lower than the first specified frequency. For example, if the electronic device has acquired the ultrasonic signal emitted by the target device to have a frequency of 25Khz, the first specified frequency may be 25Khz, and the first specified frequency range determined by the electronic device may be less than 25Khz.
S320: and acquiring the position information of target equipment according to the filtered ultrasonic signals, wherein the target equipment is equipment for transmitting the ultrasonic signals.
S330: and focusing the shooting object at the target equipment according to the position information.
In this embodiment, the specific description of the content identical to that of the other embodiments may be referred to the other embodiments, and the description is not repeated in this embodiment.
According to the focusing method provided by the embodiment, after the shooting object carries the target equipment capable of transmitting the ultrasonic signals, the electronic equipment serving as the shooting equipment can position the target equipment according to the received ultrasonic signals, so that the shooting object carrying the target equipment is positioned, and further, the electronic equipment is assisted to perform better continuous focusing on the shooting object by utilizing the space positioning capability of multiple microphones of the electronic equipment and the excellent propagation distance and positioning precision of ultrasonic waves, so that defocusing is avoided. In addition, in the embodiment, in the obtained filtered ultrasonic signals, signals except the ultrasonic signals transmitted by the carried target equipment can be greatly reduced, so that the signal-to-noise ratio of the ultrasonic signals transmitted by the target equipment is improved, the accuracy of the calculated position information is improved, the focusing effect is improved, and the shot object can keep higher definition continuously.
Referring to fig. 9, the focusing method provided by the embodiment of the application is applied to an electronic device, the audio acquisition device includes a plurality of audio acquisition devices, and the method includes:
s410: and if the audio acquisition device receives the ultrasonic signal, acquiring the frequency of the received ultrasonic signal.
S420: if the frequency of the received ultrasonic signal does not meet the second designated frequency range, filtering the received ultrasonic signal; the second designated frequency range is a second designated frequency range in which the frequency of the ultrasonic signal emitted by the target device is located.
In addition to the ultrasonic signals emitted by the target device, there may be other sound sources that may emit ultrasonic signals in the environment where the electronic device and the target device are located. In this case, the ultrasonic signals emitted by devices other than the target device may interfere with the positioning of the target device by the electronic device. Then, to reduce the interference, the electronic device may first acquire, as the second specified frequency range, a frequency range in which the frequency of the ultrasonic signal transmitted by the target device is located, and then, after receiving the ultrasonic signal, may first detect whether the frequency of the received ultrasonic signal is within the second specified frequency range.
S430: and if the frequency of the received ultrasonic signal meets a second designated frequency range, acquiring the position information of target equipment according to the ultrasonic signal, wherein the target equipment is equipment for transmitting the ultrasonic signal.
Wherein if the frequency of the received ultrasonic signal meets the second specified frequency range, then the received ultrasonic signal is characterized as the ultrasonic signal transmitted by the target device.
S440: and focusing the shooting object at the target equipment according to the position information.
In this embodiment, the specific description of the content identical to that of the other embodiments may be referred to the other embodiments, and the description is not repeated in this embodiment.
According to the focusing method provided by the embodiment, after the shooting object carries the target equipment capable of transmitting the ultrasonic signals, the electronic equipment serving as the shooting equipment can position the target equipment according to the received ultrasonic signals, so that the shooting object carrying the target equipment is positioned, and further, the electronic equipment is assisted to perform better continuous focusing on the shooting object by utilizing the space positioning capability of multiple microphones of the electronic equipment and the excellent propagation distance and positioning precision of ultrasonic waves, so that defocusing is avoided. In addition, in this embodiment, the electronic device filters the received ultrasonic signal, so as to filter the ultrasonic signal that cannot be well identified by the electronic device, so as to improve the accuracy of the obtained positioning information in the process that the electronic device positions the target device according to the ultrasonic signal.
Referring to fig. 10, the focusing method provided by the embodiment of the application is applied to an electronic device, the audio acquisition device includes a plurality of audio acquisition devices, and the method includes:
s510: and acquiring the audio environment information corresponding to the electronic equipment.
It should be noted that, as described in the foregoing description, in the environment where the electronic device and the target device are located, there may be other sound sources that emit ultrasonic signals. The ultrasonic signals emitted by other sound sources can be received by the electronic equipment, so that the electronic equipment can be interfered with the position of the positioning target equipment, and the accuracy of the determined position information is affected. Then to reduce the interference, the electronic device may analyze the current environment, where during the analysis, the electronic device may first obtain audio environment information of the environment. The audio environment information may include whether an ultrasonic signal is currently received or not, and if the ultrasonic signal is received, the frequency of the received ultrasonic signal.
S520: and determining a second designated frequency range carried in the starting instruction from a plurality of designated frequency ranges to be selected according to the audio environment information.
In the embodiment of the application, the target equipment can support transmitting ultrasonic signals with various frequencies. The frequencies that the target device can support can then be the frequencies included in the specified frequency range to be selected. If the electronic device determines according to the audio environment information that, in the environments where the electronic device and the target device are located, there is no other sound source emitting the ultrasonic signal except the target device, the electronic device may use the default frequency in the specified frequency range to be selected as the second specified frequency range. If the electronic device determines that in the environment where the electronic device and the target device are located, according to the audio environment information, there is an ultrasonic signal emitted by a sound source other than the target device, then a frequency different from the frequency of the ultrasonic signal emitted by the sound source (the sound source other than the target device) is selected from the specified frequency range to be selected as the second specified frequency range.
S530: and sending a starting instruction to target equipment so as to trigger the target equipment to start transmitting ultrasonic signals, wherein the starting instruction carries a second designated frequency range corresponding to the transmitted ultrasonic signals.
S540: and acquiring the position information of target equipment according to the ultrasonic signals received by the plurality of audio acquisition devices, wherein the target equipment is equipment for transmitting the ultrasonic signals.
Alternatively, in this embodiment, after receiving the ultrasonic signal, the audio signal outside the second specified frequency range may be filtered, and then the position information of the target device may be obtained according to the filtered ultrasonic signal.
S550: and focusing the shooting object at the target equipment according to the position information.
It should be noted that, in the embodiment of the present application, the acquisition of the audio environment information may be performed before the target device starts transmitting the ultrasonic signal as shown in S410 and S420. In addition, the electronic device can periodically acquire the audio environment information after the target device starts to transmit the ultrasonic signal, so that the electronic device can control the target device to timely change the frequency of the transmitted ultrasonic signal so as to adapt to the current latest audio environment. For example, there may be no other sound source transmitting an ultrasonic signal in the environment where the electronic device and the target device are located before the target device starts transmitting the ultrasonic signal, but after the target device starts transmitting the ultrasonic signal, there may be a sudden occurrence of transmission of the ultrasonic signal by a sound source other than the target device. The audio environment information is periodically acquired, so that sound sources other than the suddenly-appearing target device can be timely found, and whether the ultrasonic frequency emitted by the target device needs to be changed or not is timely determined, so that the focusing effect on a shooting object is kept.
Furthermore, the electronic device may also determine whether to control the target device to switch the frequency of the transmitted ultrasonic signal according to the focusing condition. Optionally, if the electronic device detects that frequent defocus still occurs during focusing, the electronic device may send a control instruction to the target device to control the target device to switch the frequency of the transmitted ultrasonic signal.
If the electronic equipment detects that the times of defocus occurrence in the specified time length is larger than the target times, determining that frequent defocus occurs. In the process of switching the frequency of the transmitted ultrasonic signal, the target device can sequentially select the frequency range from a plurality of designated frequency ranges to be selected for switching.
In this embodiment, the specific description of the content identical to that of the other embodiments may be referred to the other embodiments, and the description is not repeated in this embodiment.
According to the focusing method provided by the embodiment, after the shooting object carries the target equipment capable of transmitting the ultrasonic signals, the electronic equipment serving as the shooting equipment can position the target equipment according to the received ultrasonic signals, so that the shooting object carrying the target equipment is positioned, and further, the electronic equipment is assisted to perform better continuous focusing on the shooting object by utilizing the space positioning capability of multiple microphones of the electronic equipment and the excellent propagation distance and positioning precision of ultrasonic waves, so that defocusing is avoided. In addition, in the embodiment, the frequency of the ultrasonic signal emitted by the target device is determined by the electronic device according to the current audio environment, so that interference caused by the current audio environment to the electronic device for receiving the ultrasonic signal is reduced, and the positioning accuracy of the electronic device to the target object is improved.
Referring to fig. 11, based on the above-mentioned focusing method and device, another electronic device 1000 capable of executing the above-mentioned focusing method is provided in the embodiment of the present application. The electronic device 1000 includes one or more (only one shown in the figures) processors 102, memory 104, cameras 106, and audio acquisition devices 108 coupled to each other. The memory 104 stores therein a program capable of executing the contents of the foregoing embodiments, and the processor 102 can execute the program stored in the memory 104.
Wherein the processor 102 may include one or more processing cores. The processor 102 utilizes various interfaces and lines to connect various portions of the overall electronic device 1000, perform various functions of the electronic device 1000, and process data by executing or executing instructions, programs, code sets, or instruction sets stored in the memory 104, and invoking data stored in the memory 104. Alternatively, the processor 102 may be implemented in hardware in at least one of digital signal processing (Digital Signal Processing, DSP), field programmable gate array (Field-Programmable Gate Array, FPGA), programmable logic array (Programmable Logic Array, PLA). The processor 102 may integrate one or a combination of several of a central processing unit (Central Processing Unit, CPU), an image processor (Graphics Processing Unit, GPU), and a modem, etc. The CPU mainly processes an operating system, a user interface, an application program and the like; the GPU is used for being responsible for rendering and drawing of display content; the modem is used to handle wireless communications. It will be appreciated that the modem may not be integrated into the processor 102 and may be implemented solely by a single communication chip.
The Memory 104 may include random access Memory (Random Access Memory, RAM) or Read-Only Memory (RAM). Memory 104 may be used to store instructions, programs, code sets, or instruction sets. The memory 104 may include a stored program area and a stored data area, wherein the stored program area may store instructions for implementing an operating system, instructions for implementing at least one function (e.g., a touch function, a sound playing function, an image playing function, etc.), instructions for implementing the various method embodiments described below, etc.
Further, the electronic device 1000 may further include a network module 110 and a sensor module 112, as shown in fig. 12, in addition to the aforementioned devices.
The network module 110 is configured to implement information interaction between the electronic device 1000 and other devices, for example, transmit a device control command, a manipulation request command, and a status information acquisition command. While the electronic device 200 may be embodied as a different device, its corresponding network module 110 may be different.
The sensor module 112 may include at least one sensor. Specifically, the sensor module 112 may include, but is not limited to: light sensors, motion sensors, pressure sensors, infrared thermal sensors, distance sensors, acceleration sensors, and other sensors.
Wherein the pressure sensor may detect a pressure generated by pressing against the electronic device 1000. That is, the pressure sensor detects a pressure generated by contact or pressing between the user and the electronic device, for example, a pressure generated by contact or pressing between the user's ear and the mobile terminal. Thus, the pressure sensor may be used to determine whether contact or pressure has occurred between the user and the electronic device 1000, as well as the magnitude of the pressure.
The acceleration sensor may detect the acceleration in each direction (typically, three axes), and may detect the gravity and direction when stationary, and may be used for applications for recognizing the gesture of the electronic device 1000 (such as landscape/portrait screen switching, related games, magnetometer gesture calibration), vibration recognition related functions (such as pedometer, and knocking), and so on. In addition, the electronic device 1000 may further be configured with other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, etc., which will not be described herein.
The audio acquisition device 110 is used for acquiring audio signals. Optionally, the audio capturing device 110 includes a plurality of audio capturing devices, which may be microphones.
As one way, the network module of the electronic device 1000 is a radio frequency module, and the radio frequency module is configured to receive and transmit electromagnetic waves, and implement mutual conversion between the electromagnetic waves and the electrical signals, so as to communicate with a communication network or other devices. The radio frequency module may include various existing circuit elements for performing these functions, such as an antenna, a radio frequency transceiver, a digital signal processor, an encryption/decryption chip, a Subscriber Identity Module (SIM) card, memory, and the like. For example, the radio frequency module may interact with external devices through transmitted or received electromagnetic waves. For example, the radio frequency module may send instructions to the target device.
Referring to fig. 13, a block diagram of a computer readable storage medium according to an embodiment of the present application is shown. The computer readable medium 900 has stored therein program code which can be invoked by a processor to perform the methods described in the method embodiments described above.
The computer readable storage medium 900 may be an electronic memory such as a flash memory, an EEPROM (electrically erasable programmable read only memory), an EPROM, a hard disk, or a ROM. Optionally, computer readable storage medium 900 includes non-volatile computer readable media (non-transitory computer-readable storage medium). The computer readable storage medium 900 has storage space for program code 910 that performs any of the method steps described above. The program code can be read from or written to one or more computer program products. Program code 910 may be compressed, for example, in a suitable form.
In summary, according to the focusing method and the electronic device provided by the application, after the audio acquisition device receives the ultrasonic signal, the position information of the target device serving as the ultrasonic signal source is acquired according to the ultrasonic signal, and the shooting object at the target device is focused according to the position information. Therefore, after the shooting object carries the target equipment capable of transmitting the ultrasonic signals, the electronic equipment serving as the shooting equipment can position the target equipment according to the received ultrasonic signals, so that the shooting object carrying the target equipment is positioned, and further, the electronic equipment is assisted to perform better continuous focusing on the shooting object by utilizing the space positioning capability of a plurality of microphones of the electronic equipment and the excellent propagation distance and positioning precision of ultrasonic waves, so that defocusing is avoided.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the application has been described in detail with reference to the foregoing embodiments, it will be appreciated by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not drive the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims (8)
1. A focusing method, characterized by being applied to an electronic device, the electronic device comprising an audio acquisition device, the audio acquisition device comprising a plurality of audio acquisition devices, the method comprising:
transmitting a starting instruction to a target device, wherein the starting instruction is used for triggering the target device to start transmitting an ultrasonic signal in a second designated frequency range, the second designated frequency range is determined by the electronic device from a plurality of designated frequency ranges to be selected according to audio environment information, the audio environment information comprises the frequency of the ultrasonic signal received by the electronic device, and the second designated frequency range is different from the frequency of the ultrasonic signal transmitted by a sound source outside the target device;
If the frequency of the ultrasonic signals received by the plurality of audio acquisition devices does not meet the second designated frequency range, filtering the received ultrasonic signals;
if the frequency of the ultrasonic signals received by the plurality of audio acquisition devices meets the second designated frequency range, acquiring the position information of target equipment according to the ultrasonic signals received by the plurality of audio acquisition devices, wherein the target equipment is equipment for transmitting the ultrasonic signals;
and focusing the shooting object at the target equipment according to the position information.
2. The method of claim 1, wherein the plurality of audio acquisition devices are disposed at different locations of the electronic device, and wherein the acquiring the location information of the target device from the ultrasonic signal comprises:
acquiring the phase difference and the amplitude difference between the ultrasonic signals received by any two audio acquisition devices in the ultrasonic signals received by the audio acquisition devices;
and obtaining the position information of the target equipment according to the phase difference and the amplitude difference.
3. The method according to claim 2, wherein the obtaining the location information of the target device according to the phase difference and the amplitude difference includes:
Obtaining the position information of the target equipment according to the phase difference, the amplitude difference and a pre-established target function;
the objective function is used for representing the phase difference and the corresponding relation between the amplitude difference and the position information.
4. The method of claim 1, wherein the acquiring the position information of the target device from the ultrasonic signals received by the plurality of audio acquisition devices comprises:
filtering the audio signals in a first appointed frequency range in the ultrasonic signals received by the plurality of audio acquisition devices to obtain filtered ultrasonic signals;
and acquiring the position information of the target equipment according to the filtered ultrasonic signals.
5. The method of any one of claims 1-4, wherein the audio acquisition device is a microphone or an ultrasonic transducer.
6. The method according to any one of claims 1-4, wherein the location information includes a distance between a target device and an electronic device, or the location information includes a distance between a target device and an electronic device and azimuth information, and focusing a photographic subject at the target device according to the location information includes:
If the position information comprises the distance between the target equipment and the electronic equipment and azimuth information, and the acquisition range of the camera of the electronic equipment is determined to be changed based on the azimuth information, the acquisition range of the camera is changed based on the azimuth information, so that a shooting object moves to a designated position of a picture acquired by the camera; determining focusing parameters according to the distance; adjusting the focal length of a camera of the electronic equipment according to the focusing parameters so as to focus the shooting object;
or if the position information comprises the distance between the target equipment and the electronic equipment, determining a focusing parameter according to the distance; and adjusting the focal length of a camera of the electronic equipment according to the focusing parameters so as to focus the shooting object.
7. An electronic device, characterized in that the electronic device comprises a processor, a camera and an audio acquisition device, wherein the audio acquisition device comprises a plurality of audio acquisition devices;
the camera is used for shooting images;
the plurality of audio acquisition devices are used for acquiring ultrasonic signals;
the processor being configured to perform the method of any of claims 1-6.
8. A computer readable storage medium, characterized in that the computer readable storage medium has stored therein a computer executable program, wherein the method of any of claims 1-6 is performed when the computer executable program is run.
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