CN107835336B - Dual-camera frame synchronization method and device, user terminal and storage medium - Google Patents
Dual-camera frame synchronization method and device, user terminal and storage medium Download PDFInfo
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Abstract
The invention discloses a method and a device for synchronizing frames of double cameras, a user terminal and a storage medium, wherein the method comprises the following steps: determining a target frame rate interval of a picture shot by a first camera; acquiring a second camera frame rate of a picture shot by a second camera, and judging whether the second camera frame rate is in the target frame rate interval; and adjusting the sensitivity of the second camera so that the frame rate of the second camera is in the target frame rate interval. By the method, frame synchronization can be realized on the premise that the main camera and the auxiliary camera do not support a hardware synchronization function, so that the price cost of the cameras can be reduced, and the hardware design complexity of the cameras can also be reduced.
Description
Technical Field
The present invention relates to the field of camera data processing, and more particularly, to a method and an apparatus for frame synchronization of two cameras, a user terminal, and a storage medium.
Background
The existing mobile terminal is provided with two cameras at the same side, wherein one camera is a main camera and the other camera is an auxiliary camera. When the double cameras shoot to synthesize the background blurred picture, the main camera and the auxiliary camera are required to be capable of achieving the synchronization of shooting as much as possible, so that the effect of synchronizing the data of the shot and synthesized picture is achieved.
In the prior art, in order to enable the main camera and the auxiliary camera to achieve data synchronization as much as possible, a hardware frame synchronization method is generally adopted, two cameras need to be connected through a SYNC signal line, the auxiliary camera needs to repeatedly detect a SYNC signal connected with the hardware of the main camera to achieve frame synchronization, and the main camera and the auxiliary camera are required to support a hardware synchronization function on hardware. However, the hardware price of the camera supporting the hardware synchronization is high, and the hardware design is complex.
Disclosure of Invention
In view of the above problems, the present invention provides a method and an apparatus for frame synchronization of dual cameras, a user terminal and a storage medium, which can achieve frame synchronization even when the primary and secondary cameras do not support the hardware synchronization function, thereby reducing the cost of the cameras and the complexity of hardware design of the cameras.
In a first aspect, an embodiment of the present invention provides a method for frame synchronization of two cameras, where in an implementation process of the method, a user terminal determines a target frame rate interval of a picture taken by a first camera, then obtains a second camera frame rate of a picture taken by a second camera, determines whether the second camera frame rate is in the target frame rate interval, and adjusts sensitivity of the second camera to enable the second camera frame rate to be in the target frame rate interval, so that frame synchronization of the first camera and the second camera is implemented.
With reference to the first aspect, in a first implementation manner of the first aspect, in a scene, a first camera is used to take a picture, a first camera frame rate is obtained, so as to determine a target frame rate interval by using the first camera frame rate, and correspondingly, in the scene, a second camera frame rate is obtained by using a second camera to take a picture.
With reference to the first aspect, in a second implementation manner of the first aspect, a frame rate interval range in which the first camera frame rate falls is determined as a target frame rate interval; or, the first camera frame rate is calculated according to a preset rule, and the frame rate interval range obtained through calculation is determined as a target frame rate interval.
With reference to the first aspect, in a third implementation manner of the first aspect, when the second camera frame rate is determined to be less than the minimum value, the sensitivity of the second camera is increased so that the second camera frame rate is in a target frame rate interval, and when the second camera frame rate is determined to be greater than the maximum value, the sensitivity of the second camera is decreased so that the second camera frame rate is in the target frame rate interval.
With reference to the first aspect, in a fourth implementation manner of the first aspect, the target frame rate interval of the pictures taken by the first camera is determined by changing a brightness value of a scene in which the first camera is located.
With reference to the first aspect, in a fifth implementation manner of the first aspect, the exposure table of the first camera, which is saved in advance, is divided into a plurality of frame rate sections; one frame rate interval of the plurality of frame rate intervals is selected to be determined as a target frame rate interval.
With reference to the first aspect, in a sixth implementation manner of the first aspect, the target frame rate interval may be switched among a plurality of frame rate intervals. With reference to the first aspect, in a seventh implementation manner of the first aspect, the scene is obtained by the user terminal in advance before the picture is taken through the first camera, or is obtained by the user terminal when the picture is taken through the first camera.
In a second aspect, an embodiment of the present invention provides a dual-camera frame synchronization method, which includes acquiring a first camera frame rate of a picture taken by a first camera, comparing the first camera frame rate with a plurality of preset frame rate intervals, acquiring a target frame rate interval including the first camera frame rate, and adjusting sensitivity of a second camera to match with a target frame rate based on a correspondence between pre-stored sensitivity and the target frame rate interval.
In a third aspect, an embodiment of the present invention provides a dual-camera frame synchronization apparatus, where the apparatus includes: the device comprises a determining module, an obtaining module and an adjusting module. The determining module is used for determining a target frame rate interval of the pictures shot by the first camera; the acquisition module is used for acquiring a second camera frame rate of the pictures shot by the second camera and judging whether the second camera frame rate is in the target frame rate interval or not; and the adjusting module is used for adjusting the light sensitivity of the second camera so as to enable the frame rate of the second camera to be within the target frame rate interval.
In a fourth aspect, an embodiment of the present invention provides a dual-camera frame synchronization apparatus, where the apparatus includes: the device comprises an acquisition module, a comparison module and an adjustment module. The acquisition module is used for acquiring a first camera frame rate of a picture taken by a first camera; the comparison module is used for comparing the first camera frame rate with a plurality of preset frame rate intervals to obtain a target frame rate interval comprising the first camera frame rate; and the adjusting module is used for adjusting the sensitivity of the second camera to be matched with the target frame rate based on the corresponding relation between the sensitivity and the target frame rate interval which is stored in advance.
In a fifth aspect, the present invention provides a user terminal comprising a processor and a memory coupled to the processor, the memory storing a program for implementing the above-described dual-camera frame synchronization method, the processor being configured to execute the program stored in the memory.
In a sixth aspect, the present invention provides a storage medium comprising a stored program, wherein the program when executed performs the operations of: the method comprises the steps of firstly determining a target frame rate interval of pictures shot by a first camera through a user terminal, then obtaining a second camera frame rate of the pictures shot by a second camera, judging whether the second camera frame rate is in the target frame rate interval, and adjusting the light sensitivity of the second camera to enable the second camera frame rate to be in the target frame rate interval, so that the first camera and the second camera realize frame synchronization.
Compared with the prior art, the method, the device, the user terminal and the storage medium for frame synchronization of the double cameras provided by the invention have the advantages that the target frame rate interval of the pictures shot by the first camera is determined through the user terminal, then the second camera frame rate of the pictures shot by the second camera is obtained, whether the second camera frame rate is in the target frame rate interval or not is judged, and when the second camera frame rate is judged not to be in the target frame rate interval, the light sensitivity of the second camera is adjusted, so that the second camera frame rate is in the target frame rate interval, the frame synchronization is realized through a software method, and conditions are further created for blurring the background of a solid line in double-shot pictures. Compared with the traditional method for realizing frame synchronization through hardware, the method can reduce the price cost of the camera and the hardware design complexity of the camera.
These and other aspects of the invention are apparent from and will be elucidated with reference to the embodiments described hereinafter.
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In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 shows a block diagram of a user terminal that may be used in embodiments of the present invention;
fig. 2 is a flowchart illustrating a method for frame synchronization of two cameras according to a first embodiment of the present invention;
fig. 3 is a flowchart illustrating another dual-camera frame synchronization method according to the first embodiment of the present invention;
fig. 4 is a flowchart illustrating a method for frame synchronization of two cameras according to a second embodiment of the present invention;
fig. 5 is a block diagram illustrating a structure of a dual-camera frame synchronization apparatus according to a third embodiment of the present invention;
fig. 6 is a block diagram illustrating a structure of another dual-camera frame synchronization apparatus according to a third embodiment of the present invention;
fig. 7 is a block diagram illustrating a structure of a dual-camera frame synchronization apparatus according to a fourth embodiment of the present invention;
FIG. 8 is a schematic diagram of a computing device that can implement the dual-camera frame synchronization method of the present invention;
fig. 9 shows a schematic view of a fixed memory unit of a computer program product.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
In some of the flows described in the present specification and claims and in the above figures, a number of operations are included that occur in a particular order, but it should be clearly understood that these operations may be performed out of order or in parallel as they occur herein, with the order of the operations being indicated as 101, 102, etc. merely to distinguish between the various operations, and the order of the operations by themselves does not represent any order of performance. Additionally, the flows may include more or fewer operations, and the operations may be performed sequentially or in parallel. It should be noted that, the descriptions of "first", "second", etc. in this document are used for distinguishing different messages, devices, modules, etc., and do not represent a sequential order, nor limit the types of "first" and "second" to be different.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms used in the embodiments of the present invention will be described below.
Frame rate (Frame rate): is a measure for measuring the number of display frames for which the exposure time affects the frame rate of the camera.
Sensitivity (ISO): that is, the sensitivity of the camera, the amount of light entering the camera can be controlled.
Exposure table: also called a light meter, which measures the intensity of light during photographing and controls the exposure time and the aperture size.
Fig. 1 is a block diagram illustrating a structure of a user terminal according to an embodiment of the present invention. User terminal referring to fig. 1, the user terminal may include: radio Frequency (RF) circuitry 1510, memory 1520, input unit 1530, display unit 1540, sensor 1550, audio circuitry 1560, wireless fidelity (WiFi) module 1570, processor 1580, and power supply 1590. It will be understood by those skilled in the art that the user terminal refers to a mobile terminal used in daily life, such as a mobile phone, a tablet or other electronic product, and the structure of the user terminal shown in fig. 1 does not constitute a limitation of the user terminal, and may include more or less components than those shown, or combine some components, or arrange different components.
The following describes each component of the user terminal in detail with reference to fig. 1:
the RF circuit 1510 may be configured to receive and transmit signals during information transmission and reception or during a call, and in particular, receive downlink information of a base station and then process the received downlink information to the processor 1580; in addition, the data for designing uplink is transmitted to the base station. In general, RF circuit 1510 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a Low Noise Amplifier (LNA), a duplexer, and the like. In addition, RF circuit 1510 may also communicate with networks and other devices via wireless communication. The wireless communication may use any communication standard or protocol, including but not limited to global system for Mobile communications (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE), email, Short Messaging Service (SMS), and the like.
The memory 1520 may be used to store software programs and modules, and the processor 1580 performs various functional applications and data processing of the user terminal by operating the software programs and modules stored in the memory 1520. The memory 1520 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the user terminal, etc. Further, the memory 1520 may include high-speed random access memory and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage device.
The input unit 1530 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the user terminal. Specifically, the input unit 1530 may include a touch panel 1531 and other input devices 1532. The touch panel 1531, also referred to as a touch screen, can collect touch operations of a user (e.g., operations of the user on or near the touch panel 1531 using any suitable object or accessory such as a finger or a stylus) and drive corresponding connection devices according to a preset program. Alternatively, the touch panel 1531 may include two parts, a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, and sends the touch point coordinates to the processor 1580, and can receive and execute commands sent by the processor 1580. In addition, the touch panel 1531 may be implemented by various types such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. The input unit 1530 may include other input devices 1532 in addition to the touch panel 1531. In particular, other input devices 1532 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like.
The display unit 1540 may be used to display information input by the user or information provided to the user and various menus of the user terminal. The Display unit 1540 may include a Display panel 1541, and optionally, the Display panel 1541 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like. Further, the touch panel 1531 may cover the display panel 1541, and when the touch panel 1531 detects a touch operation on or near the touch panel 1531, the touch operation is transmitted to the processor 1580 to determine the type of the touch event, and then the processor 1580 provides a corresponding visual output on the display panel 1541 according to the type of the touch event. Although in fig. 1, the touch panel 1531 and the display panel 1541 are two separate components for implementing the input and output functions of the user terminal, in some embodiments, the touch panel 1531 and the display panel 1541 may be integrated for implementing the input and output functions of the user terminal.
The user terminal may also include at least one sensor 1550, such as light sensors, motion sensors, and other sensors. Specifically, the light sensor may include an ambient light sensor that may adjust the brightness of the display panel 1541 according to the brightness of ambient light, and a proximity sensor that may turn off the display panel 1541 and/or backlight when the user terminal moves to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally, three axes), detect the magnitude and direction of gravity when stationary, and can be used for applications (such as horizontal and vertical screen switching, related games, magnetometer attitude calibration) for recognizing the attitude of the user terminal, and related functions (such as pedometer and tapping) for vibration recognition; as for other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which can be configured by the user terminal, further description is omitted here.
WiFi belongs to short-distance wireless transmission technology, and a user terminal can help a user to receive and send e-mails, browse webpages, access streaming media and the like through a WiFi module 1570, and provides wireless broadband internet access for the user. Although fig. 1 shows WiFi module 1570, it is understood that it does not belong to the essential constitution of the user terminal, and may be omitted entirely as needed within the scope not changing the essence of the invention.
The processor 1580 is a control center of the user terminal, connects various parts of the entire user terminal using various interfaces and lines, and performs various functions of the user terminal and processes data by operating or executing software programs and/or modules stored in the memory 1520 and calling data stored in the memory 1520, thereby integrally monitoring the user terminal. Optionally, the processor 1580 may include one or more processing units; preferably, the processor 1580 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, and the like, and a modem processor, which mainly handles wireless communications. It is to be appreciated that the modem processor may not be integrated into the processor 1580.
The user terminal also includes a power supply 1590 (e.g., a battery) for powering the various components, which may preferably be logically coupled to the processor 1580 via a power management system to manage charging, discharging, and power consumption management functions via the power management system.
Although not shown, the user terminal may further include a bluetooth module, a plurality of cameras, such as a main camera and a sub-camera, and the like, which are not described herein again.
First embodiment
Referring to fig. 2, fig. 2 is a flowchart illustrating a method for frame synchronization of two cameras according to a first embodiment of the present invention, where the method is applied to a user terminal, and the user terminal includes a first camera (a main camera) and a second camera (a sub camera). The method shown in fig. 2 will be explained in detail below, and includes:
step S110: and determining a target frame rate interval of the pictures shot by the first camera.
The user terminal can respond to a photographing instruction of a user and instruct the first camera to photograph in a brightness scene to obtain a photo. Each photo contains corresponding attribute information, such as exposure time, frame rate, etc. The user terminal can acquire the first camera frame rate of the picture shot by the first camera in the brightness scene by acquiring the attribute information of the picture.
The target frame rate interval includes a maximum value and a minimum value. In one embodiment, the user terminal may determine that the frame rate interval is a target frame rate interval of a picture taken by the first camera if the first camera frame rate falls within a range formed by a minimum value and a maximum value of the frame rate interval by matching the first camera frame rate with a plurality of frame rate intervals stored in the memory. For example, the frame rate sections stored in the memory are: 10-15 frames, 15-20 frames, 20-25 frames, 25-30 frames, and the first camera frame rate is 12 frames, since 12 falls within the range of 10-15 frames, it is determined that 10-15 frames are the target frame rate interval.
As another embodiment, the ue may pre-store the operation rule as a preset rule, where the preset rule defines a preset frame rate difference. After acquiring the first camera frame rate, the user terminal may calculate the first camera frame rate according to a preset rule, so as to determine the frame rate interval range obtained through calculation as the target frame rate interval. Further, the preset rule may be that a value obtained by subtracting a preset frame rate difference from the first camera frame rate is used as a minimum value of the target frame rate interval, and a value obtained by adding the same preset frame rate difference to the first camera frame rate is used as a maximum value of the target frame rate interval. For example, the preset frame rate difference is 2, the first camera frame rate is 12 frames, and the target frame rate interval determined by the first camera frame rate is 10 (i.e., 12-2-10) -14 (i.e., 12+ 2-14) frames. The preset frame rate difference can be changed according to actual conditions.
The first camera frame rate can be represented by the exposure time of the pictures, and further, the longer the exposure time of the camera, the smaller the frame rate of the obtained pictures. Further, the photographing attributes of the camera are as follows: the frame rate of the shot pictures and the brightness value of the shot scene are in a positive correlation relationship, namely, the pictures are shot in the scene with higher brightness, the shorter the exposure time is, the higher the frame rate of the obtained pictures is, therefore, the user terminal can obtain the pictures with different first camera frame rates by shooting in different brightness scenes, and thus, different target frame rate intervals can be determined.
In the above, the target frame rate section is determined by the first camera frame rate.
As another embodiment, the target frame rate interval may be determined before the first camera frame rate is acquired. Specifically, in the embodiment of the present invention, the first camera frame rate that the user terminal needs to acquire is within the target frame rate interval. Wherein the first camera frame rate is a specific value (e.g. 27 frames), and the target frame rate interval is a value interval (e.g. 25-30 frames). When a first camera of the user terminal takes a picture in a scene, if the obtained first camera frame rate is 27 frames and the target frame rate interval is 25-30 frames, the first camera frame rate at this time is in the target frame rate interval. If the first camera frame rate obtained at this time is 20 frames and the target frame rate interval is 25-30 frames, the first camera frame rate at this time is not in the target frame rate interval.
In order to enable the first camera frame rate of the pictures taken by the first camera to be within the target frame rate interval, as an implementation manner, the user terminal may take a large number of pictures in different brightness scenes in advance, so that the brightness scene meeting the first camera frame rate within the target frame rate interval is finally found and recorded by continuously adjusting the brightness scene, so that the user terminal can be directly called when the brightness scene is needed next time.
As another embodiment, when taking a picture by the first camera, the user terminal may continuously adjust the first camera frame rate of the picture taken by the first camera to be in the target frame rate interval. In this mode, when the first camera frame rate is not in the target frame rate interval, the user terminal needs to adjust the brightness scene during photographing, so that the first camera frame rate of the photograph taken by the first camera is in the target frame rate interval.
Further, when the first camera frame rate is lower than the target frame rate interval, the user terminal may obtain information of taking a picture by switching an environment scene with a brighter luminance value and instructing the first camera to take a picture in the luminance scene, and determine whether the first camera frame rate is in the target frame rate interval, and if not, continue to adjust the picture-taking luminance scene based on a principle that the frame rate of taking the picture and the luminance value of the picture-taking scene are in a positive correlation until the first camera frame rate is in the target frame rate interval. Therefore, in this step, the first camera frame rate obtained by the first camera falls into the determined target frame rate section through adjustment, and the corresponding brightness environment is also obtained, so that data processing is performed subsequently through the determined target frame rate section.
Further, referring to fig. 3, before step S110, the method may further include:
step S101: the exposure table of the first camera which is saved in advance is divided into a plurality of frame rate sections.
For example, the exposure table of the first camera represents that the frame rate of the first camera is in the range of 10-30 frames, and then the exposure table of the first camera can be divided into 4 frame rate intervals, 10-15 frames, 15-20 frames, 20-25 frames and 25-30 frames, with 5 frames as a tolerance. Of course, here, 5 frames are taken as an example, and segmentation can be performed with a frame rate of 4 frames or even smaller as a tolerance. Wherein, the smaller the segmentation interval is, the more accurate the frame rate synchronization of the first camera and the second camera is.
Step S102: selecting one of the plurality of frame rate intervals to be determined as the target frame rate interval.
Wherein the target frame rate interval is switchable among the plurality of frame rate intervals.
Step S120: and acquiring a second camera frame rate of the pictures shot by the second camera.
Further, the user terminal may take a picture through the second camera in a scene with the same brightness as the first camera frame rate, so as to obtain the second camera frame rate.
Furthermore, in the same brightness scene of the first camera frame rate, the user terminal may initiate a shooting instruction to the second camera, so that the second camera takes a picture in the brightness scene, and obtain the second camera frame rate of the picture taken by the second camera in the brightness scene by obtaining the information of the picture taken.
Step S130: and judging whether the second camera frame rate is in the target frame rate interval.
The user terminal may determine whether the second camera frame rate is within a range included in the target frame rate interval by comparing the second camera frame rate with the target frame rate interval determined by the first camera frame rate, so as to determine whether the second camera frame rate is in the target frame rate interval.
Wherein the second camera frame rate is a specific value (e.g. 27 frames), and the target frame rate interval is a value interval (e.g. 25-30 frames). When the second camera frame rate obtained by the user terminal is 27 frames and the target frame rate interval is 25-30 frames, then the second camera frame rate at this time is in the target frame rate interval. When the second camera frame rate obtained by the user terminal is 24 frames and the target frame rate interval is 25-30 frames, the second camera frame rate at this time is not in the target frame rate interval.
When the frame rate of the second camera is in the target frame rate interval, the user terminal defaults that the data acquired by the two cameras at the same time are synchronous or almost synchronous, and data synthesis can be performed, so that background blurring of the main camera and the auxiliary camera is realized.
Step S131: and when the second camera frame rate is judged not to be in the target frame rate interval, adjusting the sensitivity of the second camera so as to enable the second camera frame rate to be in the target frame rate interval.
When the user terminal determines that the second camera frame rate is not in the target frame rate interval, the user terminal may adjust the sensitivity (i.e., gain value) of the second camera at that time, so as to change the second camera frame rate at which the second camera takes pictures in the same brightness scene. Further, on the premise that the aperture is fixed, if the gain value of the second camera is adjusted to be larger, the exposure time of the second camera will be smaller, the second camera frame rate of the obtained picture will be larger, and if the gain value of the second camera is adjusted to be smaller, the exposure time of the second camera will be larger, the second camera frame rate of the obtained picture will be smaller.
When the user terminal judges that the second camera frame rate is smaller than the minimum value of the target frame rate interval, the gain value of the second camera can be increased so as to enable the second camera frame rate to be in the target frame rate interval; and when the user terminal judges that the second camera frame rate is greater than the maximum value of the target frame rate interval, reducing the gain value of the second camera so as to enable the second camera frame rate to be in the target frame rate interval.
After the gain value of the second camera is adjusted, the user terminal may control the second camera to take a picture in the scene again, and obtain the second camera frame rate of the picture taken after the sensitivity is adjusted. And judging whether the second camera frame rate is in the target frame rate interval again, if not, adjusting the gain value of the second camera again according to the principle that the larger the gain value is, the larger the second camera frame rate is, the smaller the gain value is and the smaller the second camera frame rate is on the premise that the aperture is fixed until the second camera frame rate acquired again is in the range of the target frame rate interval determined by the first camera frame rate.
When the frame rate of the second camera is within the range of the target frame rate interval, the frame synchronization between the first camera and the second camera can be realized.
Further, when the second camera frame rate is within the range of the target frame rate interval, the corresponding relationship between the sensitivity of the second camera and the target frame rate interval at this time may be saved, so that when the user terminal takes a picture in the target frame rate interval next time, the user terminal may directly set the sensitivity of the second camera to the sensitivity corresponding to the target frame rate interval, thereby quickly achieving frame synchronization between the first camera and the second camera.
Furthermore, the user terminal may take each of the plurality of frame rate sections as a target frame rate section in turn, and when each frame rate section is taken as a target frame rate section, the corresponding relationship between the sensitivity obtained when the second camera frame rate is in the target frame rate section of the time and the target frame rate section in the shooting is saved, so that the user terminal can quickly realize the frame synchronization of the first camera and the second camera in any brightness scene.
The method for frame synchronization of two cameras provided in the first embodiment of the present invention determines a target frame rate interval of a picture taken by a first camera through a user terminal, then obtains a second camera frame rate of a picture taken by a second camera, and determines whether the second camera frame rate is in the target frame rate interval, and adjusts sensitivity of the second camera when it is determined that the second camera frame rate is not in the target frame rate interval, so that the second camera frame rate is in the target frame rate interval. Compared with the traditional method for realizing frame synchronization through hardware, the method can reduce the price cost of the camera and the hardware design complexity of the camera.
Second embodiment
Referring to fig. 4, fig. 4 is a flowchart illustrating a method for frame synchronization of two cameras according to a second embodiment of the present invention, where the method is applied to a user terminal. The following will be explained with respect to the method shown in fig. 4, which includes:
step S210: and acquiring a first camera frame rate of the pictures shot by the first camera.
Step S220: and comparing the first camera frame rate with a plurality of preset frame rate intervals to obtain a target frame rate interval comprising the first camera frame rate.
Step S230: and adjusting the sensitivity of the second camera to be matched with the target frame rate based on the corresponding relation between the pre-saved sensitivity and the target frame rate interval.
And the second camera has sensitivity corresponding to each frame rate interval, and the sensitivity enables the second camera frame rate of pictures taken by the second camera to be within the frame rate range of the target frame rate interval determined by the first camera frame rate of the first camera under the same scene. When the frame rate of the second camera is in the target frame rate interval, the user terminal defaults that the data acquired by the two cameras at the same time are synchronous or almost synchronous, and data synthesis can be performed, so that background blurring of the main camera and the auxiliary camera is realized.
In the method for synchronizing frames of two cameras provided in the second embodiment of the present invention, during a photographing process, a user terminal first obtains a first camera frame rate of a first camera, obtains a target frame rate interval matched with the first camera frame rate, and then sets sensitivity of a second camera based on sensitivity corresponding to the target frame rate, so that a second camera frame rate of a picture taken by the second camera is in the target frame rate interval, thereby synchronizing or nearly synchronizing data acquired by two cameras at the same time, and performing data synthesis, so that a primary camera and a secondary camera realize background blurring. Compared with the traditional method for realizing frame synchronization through hardware, the method can reduce the price cost of the camera and the hardware design complexity of the camera.
Third embodiment
Referring to fig. 5, fig. 5 is a block diagram illustrating a dual-camera frame synchronization apparatus 300 according to a third embodiment of the present invention, where the dual-camera frame synchronization apparatus 300 includes: a determination module 310, an acquisition module 320, and an adjustment module 330. Wherein:
a determining module 310, configured to determine a target frame rate interval of a picture taken by a first camera;
an obtaining module 320, configured to obtain a second camera frame rate of a picture taken by a second camera, and determine whether the second camera frame rate is in the target frame rate interval; and
the adjusting module 330 is configured to adjust the sensitivity of the second camera, so that the frame rate of the second camera is in the target frame rate interval.
Further, referring to fig. 6, the dual-camera frame synchronization apparatus 300 may further include:
the dividing module 340: the system comprises a first camera, a second camera, a frame rate interval and a display unit, wherein the first camera is used for shooting a first image;
the selection module 350: for selecting one of the plurality of frame rate intervals as the target frame rate interval.
For a detailed explanation process of each functional module of the dual-camera frame synchronization apparatus 300 in this embodiment, please refer to the contents described in the embodiments shown in fig. 1 to fig. 4, which are not repeated herein.
Fourth embodiment
Referring to fig. 7, fig. 7 is a block diagram illustrating a dual-camera frame synchronization apparatus 400 according to a fourth embodiment of the present invention, where the dual-camera frame synchronization apparatus 400 includes: an obtaining module 410, a comparing module 420 and an adjusting module 430. Wherein:
an obtaining module 410, configured to obtain a first camera frame rate of a picture taken by a first camera;
a comparison module 420, configured to compare the first camera frame rate with a plurality of preset frame rate intervals, to obtain a target frame rate interval including the first camera frame rate;
the adjusting module 430 is configured to adjust the sensitivity of the second camera to match the target frame rate based on a pre-stored correspondence between the sensitivity and the target frame rate interval.
For a detailed explanation process of each functional module of the dual-camera frame synchronization apparatus 400 in this embodiment, please refer to the contents described in the embodiments shown in fig. 1 to fig. 4, which are not repeated herein.
In summary, embodiments of the present invention provide a method, an apparatus, a user terminal, and a storage medium for frame synchronization of dual cameras, where a target frame rate interval of a picture taken by a first camera is determined by the user terminal, then a second camera frame rate of a picture taken by a second camera is obtained, and whether the second camera frame rate is in the target frame rate interval is determined, and when it is determined that the second camera frame rate is not in the target frame rate interval, the sensitivity of the second camera is adjusted to make the second camera frame rate in the target frame rate interval, so that frame synchronization is achieved by a software method, and a condition is further created for blurring a solid background of dual-camera shooting. Compared with the traditional method for realizing frame synchronization through hardware, the method can reduce the price cost of the camera and the hardware design complexity of the camera.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by associated hardware instructed by a program, which may be stored in a computer-readable storage medium, and the storage medium may include: a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic or optical disk, or the like.
It will be understood by those skilled in the art that all or part of the steps in the method for implementing the above embodiments may be implemented by hardware that is instructed to implement by a program, and the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
Fig. 8 illustrates a computing device that may implement a dual-camera frame synchronization method in accordance with the present invention. The computing device conventionally includes a processor 510 and a computer program product or computer-readable medium in the form of a storage device 520. The storage device 520 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. The storage device 520 has a storage space 530 for storing program code 531 for performing any of the method steps of the method described above. For example, the storage space 530 storing the program codes may include respective program codes 531 for respectively implementing various steps in the above method. The program code can be read from or written to one or more computer program products. These computer program products comprise a program code carrier such as a hard disk, a Compact Disc (CD), a memory card or a floppy disk. Such a computer program product is typically a portable or fixed storage unit as shown for example in fig. 9. The storage unit may have storage segments, storage spaces, etc. arranged similarly to storage device 520 in the computing device of FIG. 8. The program code may be compressed, for example, in a suitable form. Typically, the storage unit comprises computer readable code 531' for performing the steps of the method according to the invention, i.e. code that can be read by a processor such as 510, which when run by a computing device causes the computing device to perform the steps of the method described above.
While the user terminal provided by the present invention has been described in detail, for those skilled in the art, the idea of the embodiment of the present invention may be changed in the specific implementation and application scope, and in summary, the content of the present description should not be construed as limiting the present invention.
The embodiment of the invention also discloses:
A1. a method for frame synchronization of dual cameras, the method comprising:
determining a target frame rate interval of a picture shot by a first camera;
acquiring a second camera frame rate of a picture shot by a second camera, and judging whether the second camera frame rate is in the target frame rate interval; and
and adjusting the sensitivity of the second camera so that the frame rate of the second camera is in the target frame rate interval.
A2. The method according to a1, wherein the determining the target frame rate interval of the picture taken by the first camera comprises:
shooting a picture through the first camera in a scene, acquiring a first camera frame rate, and determining the target frame rate interval through the first camera frame rate; accordingly, the method can be used for solving the problems that,
the acquiring a second camera frame rate of the picture taken by the second camera includes:
and in the scene, shooting a picture through the second camera to obtain the second camera frame rate.
A3. The method according to a2, wherein determining the target frame rate interval from the first camera frame rate comprises: determining a frame rate interval in which the first camera frame rate falls as the target frame rate interval; or,
and calculating the first camera frame rate according to a preset rule, and determining the frame rate interval range obtained by calculation as the target frame rate interval.
A4. The method according to any one of a1-A3, wherein the target frame rate interval includes a maximum value and a minimum value, and the adjusting the sensitivity of the second camera so that the second camera frame rate is in the target frame rate interval includes:
when the second camera frame rate is judged to be smaller than the minimum value, the sensitivity of the second camera is increased so that the second camera frame rate is in the target frame rate interval, an
And when the second camera frame rate is judged to be larger than the maximum value, reducing the sensitivity of the second camera so as to enable the second camera frame rate to be in the target frame rate interval.
A5. The method according to A1, characterized in that the target frame rate interval of the pictures taken by the first camera is determined by changing the brightness value of the scene in which the first camera is located.
A6. The method according to a1, further comprising:
dividing an exposure table of a first camera which is saved in advance into a plurality of frame rate intervals;
selecting one of the plurality of frame rate intervals to be determined as the target frame rate interval.
A7. The method of a6, wherein the target frame rate interval is switchable among the plurality of frame rate intervals.
A8. The method of a2 or a5, wherein the scene is obtained in advance before or at the time of taking a picture by the first camera.
B1. A method for frame synchronization of dual cameras, the method comprising:
a user terminal acquires a first camera frame rate of a picture taken by a first camera;
comparing the first camera frame rate with a plurality of preset frame rate intervals to obtain a target frame rate interval comprising the first camera frame rate;
and adjusting the sensitivity of the second camera to be matched with the target frame rate based on the corresponding relation between the sensitivity and the target frame rate interval which is saved in advance.
C1. A dual-camera frame synchronization apparatus, the apparatus comprising:
the determining module is used for determining a target frame rate interval of the pictures shot by the first camera;
the acquisition module is used for acquiring a second camera frame rate of a picture taken by a second camera and judging whether the second camera frame rate is in the target frame rate interval or not; and
and the adjusting module is used for adjusting the sensitivity of the second camera so as to enable the frame rate of the second camera to be in the target frame rate interval.
D1. A dual-camera frame synchronization apparatus, the apparatus comprising:
the acquisition module is used for acquiring a first camera frame rate of a picture taken by a first camera;
the comparison module is used for comparing the first camera frame rate with a plurality of preset frame rate intervals to obtain a target frame rate interval comprising the first camera frame rate;
and the adjusting module is used for adjusting the sensitivity of the second camera to be matched with the target frame rate based on the corresponding relation between the sensitivity and the target frame rate interval which is saved in advance.
C1. A user terminal, characterized in that the user terminal comprises a processor and a memory coupled to the processor, the memory being for a program of the method of any of a1-a9, the processor being configured for executing the program stored in the memory.
E1. A storage medium comprising a stored program, wherein the program when executed performs the operations of:
determining a target frame rate interval of a picture shot by a first camera;
acquiring a second camera frame rate of a picture shot by a second camera, and judging whether the second camera frame rate is in the target frame rate interval; and
and adjusting the sensitivity of the second camera so that the frame rate of the second camera is in the target frame rate interval.
Claims (13)
1. A method for frame synchronization of dual cameras, the method comprising:
determining a target frame rate interval of a picture shot by a first camera;
acquiring a second camera frame rate of a picture shot by a second camera, and judging whether the second camera frame rate is in the target frame rate interval; and
and adjusting the sensitivity of the second camera so that the frame rate of the second camera is in the target frame rate interval.
2. The method of claim 1, wherein determining the target frame rate interval for the pictures taken by the first camera comprises:
shooting a picture through the first camera in a scene, acquiring a first camera frame rate, and determining the target frame rate interval through the first camera frame rate; accordingly, the method can be used for solving the problems that,
the acquiring a second camera frame rate of the picture taken by the second camera includes:
and in the scene, shooting a picture through the second camera to obtain the second camera frame rate.
3. The method of claim 2, wherein determining the target frame rate interval from the first camera frame rate comprises: determining a frame rate interval in which the first camera frame rate falls as the target frame rate interval; or,
and calculating the first camera frame rate according to a preset rule, and determining the frame rate interval range obtained by calculation as the target frame rate interval.
4. The method according to any one of claims 1 to 3, wherein the target frame rate interval includes a maximum value and a minimum value, and the adjusting the sensitivity of the second camera so that the second camera frame rate is in the target frame rate interval comprises:
when the second camera frame rate is judged to be smaller than the minimum value, the sensitivity of the second camera is increased so that the second camera frame rate is in the target frame rate interval, an
And when the second camera frame rate is judged to be larger than the maximum value, reducing the sensitivity of the second camera so as to enable the second camera frame rate to be in the target frame rate interval.
5. The method according to claim 1, wherein the target frame rate interval of the pictures taken by the first camera is determined by changing a brightness value of a scene in which the first camera is located.
6. The method of claim 1, further comprising:
dividing an exposure table of a first camera which is saved in advance into a plurality of frame rate intervals;
selecting one of the plurality of frame rate intervals to be determined as the target frame rate interval.
7. The method of claim 6, wherein the target frame rate interval is switchable among the plurality of frame rate intervals.
8. The method of claim 2 or 5, wherein the scene is pre-acquired before the picture is taken by the first camera or acquired while the picture is taken by the first camera.
9. A method for frame synchronization of dual cameras, the method comprising:
a user terminal acquires a first camera frame rate of a picture taken by a first camera;
comparing the first camera frame rate with a plurality of preset frame rate intervals to obtain a target frame rate interval comprising the first camera frame rate;
and adjusting the sensitivity of the second camera to be matched with the target frame rate based on the corresponding relation between the pre-saved sensitivity and the target frame rate interval.
10. A dual-camera frame synchronization apparatus, the apparatus comprising:
the determining module is used for determining a target frame rate interval of the pictures shot by the first camera;
the acquisition module is used for acquiring a second camera frame rate of a picture taken by a second camera and judging whether the second camera frame rate is in the target frame rate interval or not; and
and the adjusting module is used for adjusting the sensitivity of the second camera so as to enable the frame rate of the second camera to be in the target frame rate interval.
11. A dual-camera frame synchronization apparatus, the apparatus comprising:
the acquisition module is used for acquiring a first camera frame rate of a picture taken by a first camera;
the comparison module is used for comparing the first camera frame rate with a plurality of preset frame rate intervals to obtain a target frame rate interval comprising the first camera frame rate;
and the adjusting module is used for adjusting the sensitivity of the second camera to be matched with the target frame rate based on the corresponding relation between the pre-stored sensitivity and the target frame rate interval.
12. A user terminal, characterized in that the user terminal comprises a processor and a memory coupled to the processor, the memory being adapted to store a program of the method of any of claims 1-9, the processor being configured to execute the program stored in the memory.
13. A computer-readable storage medium, comprising a stored program, wherein the program when executed performs operations comprising:
determining a target frame rate interval of a picture shot by a first camera;
acquiring a second camera frame rate of a picture shot by a second camera, and judging whether the second camera frame rate is in the target frame rate interval; and
and adjusting the sensitivity of the second camera so that the frame rate of the second camera is in the target frame rate interval.
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