CN106303214B - A kind of focusing method and device - Google Patents
A kind of focusing method and device Download PDFInfo
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- CN106303214B CN106303214B CN201610589541.1A CN201610589541A CN106303214B CN 106303214 B CN106303214 B CN 106303214B CN 201610589541 A CN201610589541 A CN 201610589541A CN 106303214 B CN106303214 B CN 106303214B
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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
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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
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
- G01S15/06—Systems determining the position data of a target
- G01S15/08—Systems for measuring distance only
Abstract
The present invention provides a kind of focusing method and device.The method, comprising: send ultrasonic wave to preset range；Receive the ultrasonic wave reflected in the preset range by target reference object；According to ultrasound examination parameter and ultrasonic transmission speed, target reference object and the distance between the camera lens for shooting the target reference object are calculated；It is focused according to the distance between target reference object and camera lens；The ultrasound examination parameter includes that ultrasonic wave is sent to the time of target reference object and receives the time difference for the time that target reference object reflects ultrasonic wave；The target reference object includes the object for needing to focus.Described device includes ultrasonic wave sending module, ultrasonic wave receiving module, distance calculation module, Focusing module.The method and device can have better focus effects.
Description
Technical field
The present invention relates to computer software fields more particularly to a kind of focusing methods and device.
Background technique
As smart phone is universal and is widely applied, the function of intelligent mobile terminal is stronger and stronger, and people are to camera shooting
Experience requirements are also higher and higher.
Mobile terminal is commonly provided with front and rear camera, and function is by rear camera AF (Auto Focus, auto-focusing)
As generic configuration.With user to the prevalence of shooting demand for experience, especially self-timer, front camera is (automatic right configured with AF
It is burnt) function has become a kind of trend.
Front camera is commonly used in self-timer, is fixed by camera shooting object and distance is shorter, and there are time responses for tradition focusing
Slowly, environment influences it bigger, and under than darker or brighter environment, often focusing is inaccurate, there is the photograph taken
It is unintelligible.
Camera focusing in the prior art all uses contrast formula to focus, and this focusing reaction time is slow, and cannot be primary
Focus successfully, to focus repeatedly and find best focus position and could focus success, environment it is influenced it is very big, than darker or
When brighter, focusing is inaccurate, and it is poor to take pictures or image the quality occurred.
Summary of the invention
In view of this, the present invention provides a kind of focusing method and device, there are better focus effects.
Based on above-mentioned purpose focusing method provided by the invention, comprising:
It is sent to target area ultrasonic wave；
Receive the ultrasonic wave reflected in the target area by target reference object；
According to ultrasound examination parameter and ultrasonic transmission speed, calculates target reference object and be used to shoot the target
The distance between camera lens of reference object；
It is focused according to the distance between target reference object and camera lens；
The ultrasound examination parameter includes that ultrasonic wave is sent to the time of target reference object and receives target shooting
The time difference of the time of object reflection ultrasonic wave.
Optionally, described to calculate between the target reference object and camera lens for shooting the target reference object
Apart from the step of before, further includes:
Receive the ultrasonic wave of the object of reference reflection in the target area；
The ultrasound examination parameter further includes that ultrasonic wave is sent to the time of the object of reference and receives the reference
The time difference for the time that object reflects ultrasonic wave；
The step of the distance between camera lens for calculating target reference object and being used to shoot the target reference object
It specifically includes:
It calculates the ultrasonic wave and is sent to the time of the object of reference and the ultrasonic wave for receiving the object of reference reflection
The reference time of time is poor；
Reference distance is calculated according to the object of reference time difference and ultrasonic velocity；
According to the distance of the ultrasonic wave launch point recorded in advance to the object of reference and ultrasonic wave receiving point to the ginseng
According to the distance of object, the reference distance is corrected, calculates correction parameter；
According to the ultrasonic transmission time meter between the correction parameter and the target reference object and the camera lens
The target reference object is calculated the distance between to camera lens.
Optionally, the method is applied to mobile communication terminal；The ultrasonic wave launch point be located at mobile communication terminal by
Talk about device；The object of reference is mobile communication terminal outer casing inner wall corresponding with the speaker position.
It is optionally, described to be sent to target area before ultrasonic wave further include:
Target reference object is received apart from detection instruction；
According to the target reference object apart from detection instruction, into described the step of being sent to target area ultrasonic wave.
Optionally, it is described receive reflected by target reference object ultrasonic wave the step of after, the calculatings target shoot
Before the step of the distance between object and camera lens, further includes:
It issues ultrasonic wave and receives notice；
It receives ultrasonic wave and receives notice；
The ultrasound examination parameter is calculated according to the notification received receiving time of the ultrasonic wave.
Optionally, before the step of the distance between calculating target reference object and camera lens, further includes:
Ultrasonic transmission speed is calculated according to the real time temperature of detection environment and ultrasonic wave reference transmission speed.
Meanwhile the present invention also provides a kind of focusing mechanisms, comprising:
Ultrasonic wave sending module: for being sent to target area ultrasonic wave；
First ultrasonic wave receiving module: for receiving the ultrasonic wave reflected in the target area by target reference object；
Distance calculation module: for calculating target reference object according to ultrasound examination parameter and ultrasonic transmission speed
With the distance between the camera lens for shooting the target reference object；
Focusing module: for being focused according to the distance between target reference object and camera lens；
The ultrasound examination parameter includes that ultrasonic wave is sent to the time of target reference object and receives target shooting
The time difference of the time of object reflection ultrasonic wave.
Optionally, described device further include:
Second ultrasonic wave receiving module: for receiving the ultrasonic wave of the reflection of the object of reference in the target area；
The ultrasound examination parameter further includes that ultrasonic wave is sent to the time of the object of reference and receives the reference
The time difference for the time that object reflects ultrasonic wave；
The step of the distance between camera lens for calculating target reference object and being used to shoot the target reference object
It specifically includes:
Referring to transmission time computing module: being sent to time of the object of reference to receiving for calculating the ultrasonic wave
The reference time of the time of the ultrasonic wave of the object of reference reflection is poor；
Reference distance computing module: for calculating reference distance according to the object of reference time difference and ultrasonic velocity；
Calculating parameter calibration module: for according to the distance of the ultrasonic wave launch point recorded in advance to the object of reference and
Ultrasonic wave receiving point is corrected the reference distance to the distance of the object of reference, calculates correction parameter；
Institute is calculated according to the correction parameter and target reference object to the ultrasonic transmission time between the camera lens
Target reference object is stated the distance between to camera lens.
Optionally, described device is applied to mobile communication terminal；The ultrasonic wave launch point be located at mobile communication terminal by
Talk about device；The object of reference is mobile communication terminal outer casing inner wall corresponding with the speaker position.
Optionally, described device further include:
Apart from detection instruction receiving module: for receiving target reference object apart from detection instruction；
Ultrasonic wave sending module trigger module: for according to the target reference object apart from detection instruction, into described
The step of being sent to target area ultrasonic wave.
Optionally, described device further include:
Ultrasonic reception notice issues module: receiving notice for issuing ultrasonic wave；
Ultrasonic reception notifies receiving module: receiving notice for receiving ultrasonic wave；
Ultrasound examination parameter calculating module: described super for being calculated according to the notification received receiving time of the ultrasonic wave
Sonic detection parameter.
Optionally, described device further include:
Ultrasonic wave actual transmission speed computing module: for the real time temperature and ultrasonic wave reference transmission according to detection environment
Speed calculates ultrasonic transmission speed.
From the above it can be seen that focusing method provided by the invention and device, can clap target using ultrasonic wave
The distance between the camera lens of object that object and shooting needs focus is taken the photograph, measurement accuracy is improved.Due to ultrasonic transmission speed
Degree is very fast, thus ultrasound examination parameter can be also quickly obtained when shooting, to improve focusing speed；In addition, by
It can accurately be carried out in a short time apart from detection in using ultrasonic wave, therefore can be improved focus effects, focus effects are not
By such environmental effects.
Detailed description of the invention
Fig. 1 is focusing method schematic diagram provided in an embodiment of the present invention；
Fig. 2 is the time of the embodiment of the present invention to calculate schematic diagram；
Fig. 3 is that the focal length of the embodiment of the present invention calculates schematic diagram；
Fig. 4 is the focusing mechanism schematic diagram of the embodiment of the present invention.
Specific embodiment
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.
Present invention firstly provides a kind of focusing methods, as shown in Figure 1, including the following steps:
Step 101: being sent to target area ultrasonic wave；
Step 102: receiving the ultrasonic wave reflected in the target area by target reference object；
Step 103: according to ultrasound examination parameter and ultrasonic transmission speed, calculating target reference object and be used to shoot
The distance between the camera lens of the target reference object；
Step 104: being focused according to the distance between target reference object and camera lens；
The ultrasound examination parameter includes that ultrasonic wave is sent to the time of target reference object and receives target shooting
The time difference of the time of object reflection ultrasonic wave.
From the above it can be seen that focusing method provided by the present invention, it can be using ultrasonic wave to target shooting pair
As the distance between the camera lens with photographic subjects reference object, measurement accuracy is improved.Very due to ultrasonic transmission speed
Fastly, thus ultrasound examination parameter can be also quickly obtained when shooting, to improve focusing speed；Further, since using
Ultrasonic wave can be carried out relatively accurately apart from detection, therefore can be improved focus effects, and focus effects are not by environmental factor shadow
It rings.
In the specific embodiment of the invention, the setting range can be the side of camera lens institute face.
In the specific embodiment of the invention, as shown in figure 3, the relationship of object distance u, focal length w, focal length f are 1/u+1/v=1/f.
In some embodiment of the invention, described to calculate the target reference object and be used to shoot the target shooting pair
Before the step of the distance between camera lens of elephant, further includes:
Receive the ultrasonic wave of the object of reference reflection in the target area；
The ultrasound examination parameter further includes that ultrasonic wave is sent to the time of the object of reference and receives the reference
The time difference for the time that object reflects ultrasonic wave；
The step of the distance between camera lens for calculating target reference object and being used to shoot the target reference object
It specifically includes:
It calculates the ultrasonic wave and is sent to the time of the object of reference and the ultrasonic wave for receiving the object of reference reflection
The reference time of time is poor；
Reference distance is calculated according to the object of reference time difference and ultrasonic velocity；
According to the distance of the ultrasonic wave launch point recorded in advance to the object of reference and ultrasonic wave receiving point to the ginseng
According to the distance of object, the reference distance is corrected, calculates correction parameter；
Institute is calculated according to the correction parameter and target reference object to the ultrasonic transmission time between the camera lens
Target reference object is stated the distance between to camera lens.
Since the distance between object of reference and the camera lens are relatively fixed, can with the pre-recorded lower object of reference with
Practical relative distance between the camera lens is compared when calculating by actual range and real-time measurement calculated result, is counted
Calculate correction parameter.The correction parameter can be used for being corrected the speed of practical ultrasonic wave, since the speed of ultrasonic wave may
Due to hardware factors such as environmental factor, ultrasonic transmitters with theoretical velocity difference, when actually calculating, if
Be corrected using a fixed range, then can guarantee the distance between target reference object and camera lens calculated result have compared with
High accuracy.
In some embodiment of the invention, the method is applied to mobile communication terminal；The ultrasonic wave launch point is located at
Mobile communication terminal receiver；The object of reference is mobile communication terminal outer casing inner wall corresponding with the speaker position；Institute
Stating ultrasonic wave receiving point is mobile communication terminal microphone.
Since receiver and microphone distance are closer to, when method is applied to mobile communication terminal, camera distance
Relatively, therefore object distance approximate can be calculated using formula u=VT6/2 for receiver and microphone, wherein V is ultrasound
Wave transmission speed, T6 are time difference of the ultrasonic wave sending time to the ultrasonic wave for receiving the object reflection for needing to focus.
The mobile communication terminal can be mobile phone, tablet computer or other Portable movable products.Due to for most
For several mobile terminals, other components are not provided with inside the mobile terminal case around receiver, disturbing factor is low, therefore can incite somebody to action
Outer casing inner wall around the receiver is as object of reference.
When the mobile communication terminal is that the communication with front camera such as mobile phone, tablet computer, laptop is whole
When end, since front camera is commonly used in self-timer, is fixed by camera shooting object and distance is shorter.It can be by receiver, that is, audio headsets
Sound frequency range is set as comprising supersonic band, thus ultrasonic wave transmitting module can be multiplexed receiver；Ultrasonic wave receiving module
It can be shared with de-noising microphone possessed by mobile communication terminal.Receiver is multiplexed with ultrasonic wave transmitting module and issues ultrasonic wave
Detection object, microphone be multiplexed with ultrasonic wave receiving module and carry out received ultrasonic signal, using ultrasound examination to object away from
From rear, focal length is adjusted by the distance of detection and realizes focusing.The method focusing speed is fast, once focuses successfully, and to not by
Environment influences.
It is in some embodiment of the invention, described to be sent to target area before ultrasonic wave further include:
Target reference object is received apart from detection instruction；
According to the target reference object apart from detection instruction, into described the step of being sent to target area ultrasonic wave.
In some embodiment of the invention, it is described receive reflected by target reference object ultrasonic wave the step of after, institute
Before the step of stating calculating the distance between target reference object and camera lens, further includes:
It issues ultrasonic wave and receives notice；
It receives ultrasonic wave and receives notice；
The ultrasound examination parameter is calculated according to the notification received receiving time of the ultrasonic wave.
In a kind of specific embodiment of the present invention, the method is applied to mobile communication terminal；The ultrasound examination ginseng
Several calculating process is referring to shown in Fig. 2:
Ultrasonic wave is sent from commander sender and sends instructions to receiver, and described instruction transmitter is to emit with ultrasonic wave
The element of function, the ultrasonic wave send the instruction that instruction can be ultrasound modalities；
After receiver, which receives ultrasonic wave, sends instruction, the ultrasonic wave sending module by being set to receiver sends ultrasound
Wave；The object of reference is the neighbouring mobile communication terminal inner wall of the receiver；
After object of reference is by ultrasonic reflections, the ultrasonic wave receiving module by being set to microphone receives the ultrasound of reflection
Wave；
It sends the first ultrasonic wave and receives notice to notice receiver, the notice receiver receives second ultrasonic wave
Notice is responded；First ultrasonic wave receives the notification message that notice can be ultrasound modalities；
After needing the object focused by ultrasonic reflections, the ultrasonic wave receiving module by being set to microphone receives again
To the ultrasonic wave of reflection；
It sends the second ultrasonic wave and receives notice to notice receiver, the notice receiver receives second ultrasonic wave
Notice is responded；Second ultrasonic wave receives the notification message that notice can be ultrasound modalities.
Referring still to Fig. 2, T0 is to send ultrasonic wave from commander sender to send instructions to receiver response sending ultrasonic wave
Time interval.T1 is to send instruction from ultrasonic wave described in receiver response to issue ultrasonic wave to the inner wall by mobile communication terminal
Reflect ultrasonic wave the actual transmissions time.T2, T5 are the response time that the ultrasonic wave receiving module receives system after ultrasonic wave,
The ultrasonic wave that inner wall reflects namely, which is received, from ultrasonic wave receiving module receives the reception of the first ultrasonic wave to notice receiver
The time of notice and the ultrasonic wave for needing the object that focuses to reflect is received from ultrasonic wave receiving module connect to notice receiver
Receive the second ultrasonic wave notification received time.T4 is anti-to target reference object to launch ultrasonic wave from ultrasonic wave transmitting module
The ultrasonic wave receiving module that the ultrasonic wave penetrated is arranged at microphone receives the time of ultrasonic wave.T6 is that notice receiver receives
Notice to notice receiver is received to the first ultrasonic wave and receives the second ultrasonic wave notification received time difference, that is, is responded from mobile phone
The time difference for the ultrasonic wave that the ultrasonic wave and response that inner wall reflects are reflected from target reference object.
T1 mainly determines by the distance of object of reference to microphone and receiver, due to ultrasonic wave receiving module may be disposed at by
It talks about near device, while shell distance microphone and receiver are relatively, and the T1 time is close to zero.T2=T5 releases T4-T1=
The time difference for the ultrasonic wave that the ultrasonic wave and response that T6, i.e. response are reflected from mobile phone inner wall are reflected from target reference object.
If the distance between microphone and the notice receiver and the distance between receiver and described instruction transmitter have been set
It is fixed, then it can be according to ultrasonic wave transmission instruction sending time, the first ultrasonic wave receive notice receiving time, the second ultrasonic wave receives and leads to
Know that receiving time calculates T1, T4, is received with the object of reference actually recorded to ultrasonic wave sending module and ultrasonic wave according to T1 value
The distance value of module is corrected to used ultrasonic velocity angle value is calculated, then according to the ultrasonic velocity after T4 and correction
It can calculate and need the object that focuses the distance between to receiver, thus can be with according to the distance between receiver and camera lens
It calculates or estimation needs the object that focuses the distance between to camera lens.
In some embodiment of the invention, before the step of the distance between calculating target reference object and camera lens,
Further include:
Ultrasonic transmission speed is calculated according to the real time temperature of detection environment and ultrasonic wave reference transmission speed.
Ultrasonic wave spread speed V=331.4+0.6t in air, t are the temperature in air, by degree Celsius as unit of.t
Detection can be realized by being placed in the temp-sensitive sensor of mobile phone.
Meanwhile the present invention provides a kind of focusing mechanism, structure is as shown in Figure 4, comprising:
Ultrasonic wave sending module 401: for being sent to target area ultrasonic wave；
First ultrasonic wave receiving module 402: for receiving the ultrasound reflected in the target area by target reference object
Wave；
Distance calculation module 403: for calculating target shooting pair according to ultrasound examination parameter and ultrasonic transmission speed
As with the distance between the camera lens for shooting the target reference object；
Focusing module 404: for being focused according to the distance between target reference object and camera lens；
The ultrasound examination parameter includes the time of the ultrasonic wave of the target reference object reflection received, ultrasonic wave hair
Penetrate the distance between time, ultrasonic wave launch point and camera lens；.
In some embodiment of the invention,
Described device further include:
Second ultrasonic wave receiving module: for receiving the ultrasonic wave of the reflection of the object of reference in the target area；
The ultrasound examination parameter further includes that ultrasonic wave is sent to the time of the object of reference and receives the reference
The time difference for the time that object reflects ultrasonic wave；
The step of the distance between camera lens for calculating target reference object and being used to shoot the target reference object
It specifically includes:
Referring to transmission time computing module: for calculating object of reference to the ultrasonic transmission time between the camera lens；
Reference distance computing module: for being calculated according to the object of reference to the ultrasonic transmission time between the camera lens
Object of reference is the distance between to the camera lens；
Calculating parameter calibration module: for according to the object of reference recorded in advance between the camera lens actually away from
From, the reference distance is corrected, calculate correction parameter；
Institute is calculated according to the correction parameter and target reference object to the ultrasonic transmission time between the camera lens
Target reference object is stated the distance between to camera lens.
In some embodiment of the invention, described device is applied to mobile communication terminal；The ultrasonic wave launch point is located at
Mobile communication terminal receiver；The object of reference is mobile communication terminal outer casing inner wall corresponding with the speaker position.
In some embodiment of the invention, described device further include:
Apart from detection instruction receiving module: for receiving target reference object apart from detection instruction；
Ultrasonic wave sending module trigger module: for according to the target reference object apart from detection instruction, into described
The step of being sent to target area ultrasonic wave.
In some embodiment of the invention, described device further include:
Ultrasonic reception notice issues module: receiving notice for issuing ultrasonic wave；
Ultrasonic reception notifies receiving module: receiving notice for receiving ultrasonic wave；
Ultrasound examination parameter calculating module: described super for being calculated according to the notification received receiving time of the ultrasonic wave
Sonic detection parameter.
In some embodiment of the invention, described device further include:
Ultrasonic wave actual transmission speed computing module: for the real time temperature and ultrasonic wave reference transmission according to detection environment
Speed calculates ultrasonic transmission speed.
From the above it can be seen that focusing method provided by the invention and device, can clap target using ultrasonic wave
The distance between the camera lens of object that object and shooting needs focus is taken the photograph, measurement accuracy is improved.Due to ultrasonic transmission speed
Degree is very fast, thus ultrasound examination parameter can be also quickly obtained when shooting, to improve focusing speed；In addition, by
It can accurately be carried out in a short time apart from detection in using ultrasonic wave, therefore can be improved focus effects, focus effects are not
By such environmental effects.
It should be appreciated that multiple embodiments described in this specification are merely to illustrate and explain the present invention, it is not used to limit
The fixed present invention.And in the absence of conflict, the features in the embodiments and the embodiments of the present application can be combined with each other.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (8)
1. a kind of focusing method, the method is applied to mobile communication terminal characterized by comprising
The receiver of the mobile communication terminal is sent to target area ultrasonic wave；
The microphone of the mobile communication terminal receives the ultrasonic wave of the reflection of the target reference object in the target area；
Wherein, the microphone is set near receiver；
According to ultrasound examination parameter and ultrasonic transmission speed and the receiver and for shooting the target shooting pair
The distance between camera lens of elephant calculates between the target reference object and camera lens for shooting the target reference object
Distance；
It is focused according to the distance between the target reference object and the camera lens；
The ultrasound examination parameter includes that ultrasonic wave is sent to the time of target reference object and receives target reference object
The time difference of the time reflected ultrasonic wave；
The step of the distance between camera lens for calculating the target reference object and being used to shoot the target reference object
Before, further includes:
Receive the ultrasonic wave of the object of reference reflection in the target area；
The object of reference is mobile communication terminal outer casing inner wall corresponding with mobile communication terminal speaker position.
2. calculating the target reference object the method according to claim 1, wherein described and being used to shoot institute
Before the step of stating the distance between the camera lens of target reference object, further includes:
The ultrasound examination parameter further includes that ultrasonic wave is sent to the time of the object of reference and to receive the object of reference anti-
Penetrate the time difference of the time of ultrasonic wave；
The step of calculating target reference object is with the distance between the camera lens for being used to shoot the target reference object is specific
Include:
Calculate time and the time for the ultrasonic wave for receiving the object of reference reflection that the ultrasonic wave is sent to the object of reference
Reference time it is poor；
Reference distance is calculated according to the object of reference time difference and ultrasonic velocity；
According to the distance of the ultrasonic wave launch point recorded in advance to the object of reference and ultrasonic wave receiving point to the object of reference
Distance, the reference distance is corrected, calculate correction parameter；
Institute is calculated according to the ultrasonic transmission time between the correction parameter and the target reference object and the camera lens
Target reference object is stated the distance between to camera lens.
3. the method according to claim 1, wherein described be sent to target area before ultrasonic wave further include:
Target reference object is received apart from detection instruction；
According to the target reference object apart from detection instruction, into described the step of being sent to target area ultrasonic wave；
After described the step of receiving the ultrasonic wave reflected by target reference object, the calculating target reference object and camera lens it
Between apart from the step of before, further includes:
It issues ultrasonic wave and receives notice；
It receives ultrasonic wave and receives notice；
The ultrasound examination parameter is calculated according to the notification received receiving time of the ultrasonic wave.
4. the method according to claim 1, wherein the distance between the calculating target reference object and camera lens
The step of before, further includes:
Ultrasonic transmission speed is calculated according to the real time temperature of detection environment and ultrasonic wave reference transmission speed.
5. a kind of focusing mechanism, described device is applied to mobile communication terminal characterized by comprising
Ultrasonic wave sending module: for being sent to target area ultrasonic wave；
First ultrasonic wave receiving module: for receiving the ultrasonic wave reflected in the target area by target reference object；
Wherein, the ultrasonic wave sending module is the receiver of the mobile communication terminal, the first ultrasonic wave receiving module
For the microphone of the mobile communication terminal, wherein the microphone is set near receiver；
Distance calculation module: for according to ultrasound examination parameter and ultrasonic transmission speed and the receiver be used for
The distance between the camera lens of the target reference object is shot, target reference object is calculated and is used to shoot the target shooting pair
The distance between camera lens of elephant；
Focusing module: for being focused according to the distance between target reference object and camera lens；
Second ultrasonic wave receiving module: for receiving the ultrasonic wave of the reflection of the object of reference in the target area；
The ultrasound examination parameter includes that ultrasonic wave is sent to the time of target reference object and receives target reference object
The time difference of the time reflected ultrasonic wave；
The object of reference is mobile communication terminal outer casing inner wall corresponding with mobile communication terminal speaker position.
6. device according to claim 5, which is characterized in that described device further include:
The ultrasound examination parameter further includes that ultrasonic wave is sent to the time of the object of reference and to receive the object of reference anti-
Penetrate the time difference of the time of ultrasonic wave；
The step of calculating target reference object is with the distance between the camera lens for being used to shoot the target reference object is specific
Include:
Referring to transmission time computing module: being sent to time of the object of reference to described in receiving for calculating the ultrasonic wave
The reference time of the time of the ultrasonic wave of object of reference reflection is poor；
Reference distance computing module: for calculating reference distance according to the object of reference time difference and ultrasonic velocity；
Calculating parameter calibration module: for the distance and ultrasound according to the ultrasonic wave launch point recorded in advance to the object of reference
Wave receiving point is corrected the reference distance to the distance of the object of reference, calculates correction parameter；
The mesh is calculated according to the correction parameter and target reference object to the ultrasonic transmission time between the camera lens
Reference object is marked the distance between to camera lens.
7. device according to claim 5, which is characterized in that described device further include:
Apart from detection instruction receiving module: for receiving target reference object apart from detection instruction；
Ultrasonic wave sending module trigger module: it is used for according to the target reference object detection instruction, into described to target area
Domain sends the step of ultrasonic wave；
Described device further include:
Ultrasonic reception notice issues module: receiving notice for issuing ultrasonic wave；
Ultrasonic reception notifies receiving module: receiving notice for receiving ultrasonic wave；
Ultrasound examination parameter calculating module: for calculating the ultrasonic wave according to the notification received receiving time of the ultrasonic wave
Detection parameters.
8. device according to claim 5, which is characterized in that described device further include:
Ultrasonic wave actual transmission speed computing module: for the real time temperature and ultrasonic wave reference transmission speed according to detection environment
Calculate ultrasonic transmission speed.
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| CN112135034A (en) * | 2019-06-24 | 2020-12-25 | Oppo广东移动通信有限公司 | Photographing method and device based on ultrasonic waves, electronic equipment and storage medium |
| CN111314602B (en) * | 2020-02-17 | 2021-09-17 | 浙江大华技术股份有限公司 | Target object focusing method, target object focusing device, storage medium and electronic device |
| CN112543284B (en) * | 2020-11-27 | 2022-04-19 | 维沃移动通信有限公司 | Focusing system, method and device |
| CN113542597B (en) * | 2021-07-01 | 2023-08-29 | Oppo广东移动通信有限公司 | Focusing method and electronic device |
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