WO2019129092A1 - Frame rate-lowered photographing method, mobile terminal and storage medium - Google Patents

Abstract

Disclosed are a frame rate-lowered photographing method, a mobile terminal and a storage medium. The method comprises: obtaining a preview frame rate of a current environment by means of camera preview, and collecting exposure information of each frame of data in real time; determining whether the current photographing environment is a low-light environment or not according to the exposure information and the preview frame rate; if the current photographing environment is a low-light environment, modifying exposure parameters according to a preset algorithm, and outputting corresponding frame data according to the exposure parameters; and selecting the frame data with the exposure time satisfying a preset value, and outputting an image according to the selected frame data.

Description

Frame dropping rate photographing method, mobile terminal and storage medium

This application claims the priority of the Chinese patent application filed on December 29, 2017, the Chinese Patent Office, the application number is 201711476901.8, and the invention name is "a frame down rate photographing method, mobile terminal and storage medium", the entire contents of which are The citations are incorporated herein by reference.

Technical field

The present invention relates to the field of mobile terminal technologies, and in particular, to a frame dropping rate photographing method, a mobile terminal, and a storage medium.

Background technique

The Android operating system is an intelligent mobile terminal operating system launched by Google. In recent years, with the development of technologies such as mobile terminal hardware and software, the camera application of mobile terminals has become more and more widespread; but in low light environment Especially in the night scene, due to the hardware limitations of the mobile terminal itself and the limitations of the lighting conditions of the environment, when the shooting is taken, there will be a phenomenon of poor picture sharpness and noise.

Therefore, improving the quality of photographs in low light is particularly important for users; in the current technology, although the quality of photographs can be improved by multi-frame synthesis software technology, the quality of the images output by the original camera is low, and the software algorithm corrects them. The way you can't get good results, it's hard to get high quality pictures.

Therefore, the prior art has yet to be improved and developed.

technical problem

Embodiments of the present invention provide a frame dropping rate photographing method, a mobile terminal, and a storage medium, which can output a high-quality photo with an original camera by dynamically reducing a frame rate, and solve a poor photo definition in a low-light environment from a source. And the problem of more noise, improve the quality of photos, and is convenient for users.

Technical solution

The technical solution adopted by the present invention to solve the technical problem is as follows:

In a first aspect, an embodiment of the present invention provides a method for photographing a frame down rate, where the method for photographing a frame down rate includes:

Obtain a preview frame rate of the current environment through camera preview, and collect exposure information of each frame of data in real time;

Determining, according to the exposure information and the preview frame rate, whether the current photographing environment is a low-light environment with a predetermined value;

When it is determined that the current photographing environment is a low-light environment with a predetermined value, the exposure parameter is modified according to a preset algorithm, and corresponding frame data is output according to the exposure parameter;

Frame data whose exposure time satisfies a predetermined value is selected, and an image is output through the selected frame data.

Further, the method for photographing a frame down rate, wherein the step of acquiring a preview frame rate of a current environment by a camera preview and collecting exposure information of each frame of data in real time includes the following steps:

Get the preview frame rate of the current environment through camera preview;

The exposure information of each frame of data is collected in real time, and the exposure information includes an exposure time length, a sensitivity value, and an exposure stability flag.

Further, the method for photographing a frame down rate, wherein determining a predetermined value of the low light environment is:

The exposure time is greater than 1/17 second;

The sensitivity value is greater than 1200 degrees;

The preset frame rate is less than 15 frames;

If and only when the exposure time is greater than 1/17 second, the sensitivity value is greater than 1200 degrees, and the preset frame rate is less than 15 frames, it is determined that the current photographing environment is a low light environment.

Further, the method for photographing a frame down rate, wherein when it is determined that the current photographing environment is a non-low light environment, the normal photographing mode is continued.

Further, the method for photographing a frame down rate, wherein, when it is determined that the current photographing environment is a low light environment with a predetermined value, the exposure parameter is modified according to a preset algorithm, and corresponding frame data is output according to the exposure parameter. The steps include the following steps:

Obtaining an exposure duration, an exposure line number, and an exposure gain of the current frame when it is determined that the current photographing environment is a low-light environment with a predetermined value;

Calculating the frame down factor according to the exposure duration of the current frame;

Modifying the number of exposure lines and the exposure gain according to the frame down factor, and applying the modified number of exposure lines and exposure gain to the camera;

The camera takes a photo according to the modified exposure line number and exposure gain, and outputs frame data of the captured photo.

Further, the frame down rate photographing method, wherein the down frame factor, the modified number of exposure lines, and the modified exposure gain satisfy the following relationship:

The number of exposed exposure lines = the current number of exposure lines * the frame down factor;

Modified exposure gain = current exposure gain / frame down factor;

The frame down factor is a default value of 4;

When the current frame rate is divided by the default value of 4 and less than 4, the frame down factor is adjusted to the value of the current frame rate divided by 4, otherwise the frame down factor is the default value of 4.

Further, the method for photographing a frame down rate, wherein the step of selecting frame data whose exposure time satisfies a predetermined value and outputting an image through the selected frame data specifically includes the following steps:

Obtaining all frame data of the shooting, and detecting whether the exposure time of each frame data satisfies a predetermined value;

When it is detected that the exposure time of the frame data satisfies a predetermined value, the frame data is selected, and an image is output.

Further, the frame down rate photographing method, wherein the predetermined value of the exposure time is 1/4 second.

In a second aspect, an embodiment of the present invention provides a mobile terminal, including a processor, and a memory connected to the processor, where the memory stores a frame down rate photographing program, and the frame down rate photographing program is The processor is executed to implement the following steps:

Obtain a preview frame rate of the current environment through camera preview, and collect exposure information of each frame of data in real time;

Determining, according to the exposure information and the preview frame rate, whether the current photographing environment is a low-light environment with a predetermined value;

When it is determined that the current photographing environment is a low-light environment with a predetermined value, the exposure parameter is modified according to a preset algorithm, and corresponding frame data is output according to the exposure parameter;

Frame data whose exposure time satisfies a predetermined value is selected, and an image is output through the selected frame data.

The mobile terminal, wherein the step of acquiring a preview frame rate of a current environment by a camera preview and collecting exposure information of each frame of data in real time includes the following steps:

Get the preview frame rate of the current environment through camera preview;

The exposure information of each frame of data is collected in real time, and the exposure information includes an exposure time length, a sensitivity value, and an exposure stability flag.

In the mobile terminal, the step of modifying an exposure parameter according to a preset algorithm and outputting corresponding frame data according to the exposure parameter, specifically including the following, when determining that the current photographing environment is a low-light environment with a predetermined value step:

Obtaining an exposure duration, an exposure line number, and an exposure gain of the current frame when it is determined that the current photographing environment is a low-light environment with a predetermined value;

Calculating the frame down factor according to the exposure duration of the current frame;

Modifying the number of exposure lines and the exposure gain according to the frame down factor, and applying the modified number of exposure lines and exposure gain to the camera;

The camera takes a photo according to the modified exposure line number and exposure gain, and outputs frame data of the captured photo.

The mobile terminal, wherein the down frame factor, the modified number of exposure lines, and the modified exposure gain satisfy the following relationship:

The number of exposed exposure lines = the current number of exposure lines * the frame down factor;

Modified exposure gain = current exposure gain / frame down factor;

The frame down factor is a default value of 4;

When the current frame rate is divided by the default value of 4 and less than 4, the frame down factor is adjusted to the value of the current frame rate divided by 4, otherwise the frame down factor is the default value of 4.

The mobile terminal, wherein the step of selecting frame data whose exposure time satisfies a predetermined value and outputting an image through the selected frame data specifically includes the following steps:

Obtaining all frame data of the shooting, and detecting whether the exposure time of each frame data satisfies a predetermined value;

When it is detected that the exposure time of the frame data satisfies a predetermined value, the frame data is selected, and an image is output.

In a third aspect, an embodiment of the present invention provides a storage medium, where the storage medium stores a frame down rate photographing program, and the frame down rate photographing program is used by the processor to implement the following steps:

Obtain a preview frame rate of the current environment through camera preview, and collect exposure information of each frame of data in real time;

Determining, according to the exposure information and the preview frame rate, whether the current photographing environment is a low-light environment with a predetermined value;

When it is determined that the current photographing environment is a low-light environment with a predetermined value, the exposure parameter is modified according to a preset algorithm, and corresponding frame data is output according to the exposure parameter;

Frame data whose exposure time satisfies a predetermined value is selected, and an image is output through the selected frame data.

The storage medium, wherein the step of acquiring a preview frame rate of a current environment by a camera preview and collecting exposure information of each frame of data in real time includes the following steps:

Get the preview frame rate of the current environment through camera preview;

The exposure information of each frame of data is collected in real time, and the exposure information includes an exposure time length, a sensitivity value, and an exposure stability flag.

The storage medium, wherein the predetermined value of the low light environment is determined as:

The exposure time is greater than 1/17 second;

The sensitivity value is greater than 1200 degrees;

The preset frame rate is less than 15 frames;

If and only when the exposure time is greater than 1/17 second, the sensitivity value is greater than 1200 degrees, and the preset frame rate is less than 15 frames, it is determined that the current photographing environment is a low light environment.

The storage medium, wherein when it is determined that the current photographing environment is a non-low light environment, the normal photographing mode is continued.

The storage medium, wherein the step of modifying an exposure parameter according to a preset algorithm and outputting corresponding frame data according to the exposure parameter when the current photo environment is determined to be a low-light environment of a predetermined value, specifically includes the following step:

Obtaining an exposure duration, an exposure line number, and an exposure gain of the current frame when it is determined that the current photographing environment is a low-light environment with a predetermined value;

Calculating the frame down factor according to the exposure duration of the current frame;

Modifying the number of exposure lines and the exposure gain according to the frame down factor, and applying the modified number of exposure lines and exposure gain to the camera;

The camera takes a photo according to the modified exposure line number and exposure gain, and outputs frame data of the captured photo.

The storage medium, wherein the down frame factor, the modified number of exposure lines, and the modified exposure gain satisfy the following relationship:

The number of exposed exposure lines = the current number of exposure lines * the frame down factor;

Modified exposure gain = current exposure gain / frame down factor;

The frame down factor is a default value of 4;

When the current frame rate is divided by the default value of 4 and less than 4, the frame down factor is adjusted to the value of the current frame rate divided by 4, otherwise the frame down factor is the default value of 4.

The storage medium, wherein the step of selecting the frame data whose exposure time satisfies a predetermined value and outputting the image through the selected frame data specifically includes the following steps:

Obtaining all frame data of the shooting, and detecting whether the exposure time of each frame data satisfies a predetermined value;

When it is detected that the exposure time of the frame data satisfies a predetermined value, the frame data is selected, and an image is output.

Beneficial effect

The invention provides a frame dropping rate photographing method, a mobile terminal and a storage medium, the method comprising: obtaining a preview frame rate of a current environment through a camera preview, and collecting exposure information of each frame data in real time; according to the exposure information And a preview frame rate to determine whether the current photographing environment is a low-light environment of a predetermined value; when it is determined that the current photographing environment is a low-light environment with a predetermined value, the exposure parameter is modified according to a preset algorithm, and the corresponding frame is output according to the exposure parameter. Data; frame data whose exposure time satisfies a predetermined value is selected, and an image is output through the selected frame data. By dynamically reducing the frame rate, the invention outputs high-quality photos with the original camera, and solves the problem of poor picture definition and noise in the low-light environment from the source, improves the quality of the photos, and is convenient for the user to use.

DRAWINGS

1 is a flow chart of a first preferred embodiment of a method for photographing a frame down rate provided by the present invention.

2 is a functional block diagram of a preferred embodiment of a mobile terminal provided by the present invention.

FIG. 3 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention.

Embodiments of the invention

The present invention will be further described in detail below with reference to the accompanying drawings. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Embodiment 1

Referring to FIG. 1, FIG. 1 is a flowchart of a first preferred embodiment of a method for photographing a frame down rate according to an embodiment of the present invention. As shown in FIG. 1 , a method for photographing a frame down rate, comprising the following steps:

In step S100, the preview frame rate of the current environment is obtained through camera preview, and the exposure information of each frame of data is collected in real time.

In the embodiment of the present invention, in the preview callback thread of the mobile terminal, the data of each frame is fed back by the metadata, and the feedback information includes the required exposure information; when the feedback information is stable, the mobile terminal uses the exposure information. The storage information includes an exposure time length, a sensitivity value, and an exposure stability flag; when the exposure information is unstable, the exposure information is cleared; meanwhile, when the exposure information is acquired, the frame rate information needs to be collected and exposed. Information and frame rate information is stored to the corresponding data packet.

Further, the exposure information includes:

1) Exposure time: the exposure time of the current frame data;

2) Sensitivity value: the sensitivity value of the current frame data;

3) Exposure stability mark: indicates that the exposure has entered a steady state, all data has no deviation, and the camera has correctly detected the current brightness value.

Specifically, step S100 specifically includes the following steps:

S101. Obtain a preview frame rate of the current environment by using a camera preview.

S102. Collect exposure information of each frame of data in real time, and the exposure information includes an exposure duration, a sensitivity value, and an exposure stability flag.

Step S200: Determine, according to the exposure information and the preview frame rate, whether the current photographing environment is a low-light environment with a predetermined value.

In the embodiment of the present invention, in the photographing thread of the mobile terminal, when receiving the photographing request of the user, it is necessary to obtain the exposure duration, the sensitivity value, the exposure stability flag, and the current frame rate from the stored exposure information; When the exposure is stable, it can be further judged whether the requirements of low light environment are met.

Further, determining, according to the exposure information and the preview frame rate, whether the current photographing environment is a low-light environment with a predetermined value, and determining a predetermined value of the low-light environment is:

The exposure time is greater than 1/17 second;

The sensitivity value is greater than 1200 degrees;

The preset frame rate is less than 15 frames;

Further, if and only when the exposure time is greater than 1/17 second, the sensitivity value is greater than 1200 degrees, and the preset frame rate is less than 15 frames, it is determined that the current photographing environment is a low light environment, and at this time, the camera is controlled to enter the down frame. mode.

Further, when the above three determination conditions are unsatisfied, the current environment cannot be determined to be a low-light environment, that is, the current environment is a non-low-light environment. At this time, the camera is controlled to continue the normal photographing mode.

Step S300: When it is determined that the current photographing environment is a low-light environment with a predetermined value, the exposure parameter is modified according to a preset algorithm, and corresponding frame data is output according to the exposure parameter.

In the embodiment of the present invention, the main task of the down frame mode in a low light environment is to calculate a suitable exposure parameter and apply it to the camera, that is, a method of modifying the exposure information, so that the camera extends the exposure time, and at the same time, in order to ensure The brightness value of the exposure does not change, and the gain of the exposure needs to be adjusted to achieve the exposure balance.

Further, when performing the reduction of the frame rate to modify the exposure information, the following steps are required:

1) Get the current exposure information:

The exposure information is the exposure duration, the number of exposure lines, and the exposure gain of the current frame. By acquiring the exposure duration, the number of exposure lines, and the exposure gain of the current frame, the exposure duration, the number of exposure lines, and the exposure gain of the current frame are modified to achieve a drop. The purpose of frame photography.

2) Calculate the frame down factor:

The frame down factor is the amplitude value of the frame down, which has a default value (the default value is 4), but in actual shooting, the frame down factor needs to be recalculated according to the current exposure, and the purpose is to reduce the frame. The amplitude is controlled within a certain range to achieve a balance between shooting and image quality.

The calculation method is as follows: the current exposure time is down-framed to ensure that the exposure time is within 1/4 second. When the current exposure time exceeds 1/4 second, adjust the frame down factor to ensure that the final exposure time is 1/4 second; when the current exposure time does not exceed 1/4 second, the default frame down factor is used; That is, first set a default frame down factor value equal to "4", if the current frame rate is divided by the default frame down factor, the value obtained is less than 4, then the frame down factor is adjusted to the current frame rate divided by 4; otherwise Just use the default frame down factor.

3) Modify the number of exposure lines and exposure gain:

The number of exposure lines and the exposure gain are recalculated by the calculation result of the frame down factor, and the number of exposure lines and the exposure gain are calculated as follows:

The number of exposed exposure lines = the current number of exposure lines * the frame down factor;

Modified exposure gain = current exposure gain / frame down factor;

The frame down factor is a default value of 4;

When the current frame rate is divided by the default value of 4 and less than 4, the frame down factor is adjusted to the value of the current frame rate divided by 4, otherwise the frame down factor is the default value of 4.

Finally, the newly calculated exposure line number and exposure gain are applied to the camera by parameter setting (generally written in the corresponding register).

Specifically, step S300 includes the following steps:

S301, when it is determined that the current photographing environment is a low-light environment with a predetermined value, acquiring an exposure duration, an exposure line number, and an exposure gain of the current frame;

S302. Calculate a frame down factor according to an exposure duration of the current frame.

S303, modifying the exposure line number and the exposure gain according to the frame down factor, and applying the modified exposure line number and exposure gain to the camera;

S304. The camera takes a photo according to the modified exposure line number and the exposure gain, and outputs frame data of the captured photo.

In step S400, frame data whose exposure time satisfies a predetermined value is selected, and an image is output through the selected frame data.

In the embodiment of the present invention, the purpose of selecting the captured data frame is to select the frame data generated by the down frame mode, and in combination with the actual situation of the Android system, the image data from the camera is buffered into a fixed length team. At the time of shooting, the frame data output will be directly obtained from this queue. This is a pair of captured images; in low-light shooting, the exposure parameters are modified and applied to the camera, and then the camera applies these modified exposure parameters. Execution of the exposure, and finally buffer the image data into the queue; this whole process takes a certain amount of time, and during this period, there will be frame data after the application of the new and old exposure parameters in the queue, so it is necessary to identify the frame data and select Valid frame data.

Further, when the camera enters the low-light photo mode, the data frame queue is also emptied once to ensure that the data frames acquired from the queue are the same; when the frame data is selected, the corresponding selection The program obtains the frame data from the head of the frame data queue, and then detects the exposure duration of the frame data. If the exposure duration satisfies the expected value, it indicates that the frame data is already subjected to the frame down processing, that is, it is considered to be The valid frame is then output as the captured image; otherwise, the next frame of data is retrieved from the frame data queue, and this operation is repeated until a valid frame is obtained.

Specifically, step S400 includes the following steps:

S401: Acquire all frame data of the shooting, and detect whether an exposure time of each frame data meets a predetermined value;

S402, when it is detected that the exposure time of the frame data satisfies a predetermined value, the frame data is selected, and an image is output.

Certainly, those skilled in the art can understand that all or part of the process in implementing the foregoing embodiment method can be completed by instructing related hardware (such as a processor, a controller, etc.) by a program that takes pictures at a frame down rate. The program may be stored in a computer readable storage medium, and the program may include the flow of the method embodiments as described above when executed. The storage medium described therein may be a memory, a magnetic disk, an optical disk, or the like.

Embodiment 2

The embodiment of the present invention further provides a mobile terminal. As shown in FIG. 2, the mobile terminal in the embodiment of the present invention may be a mobile phone (or a tablet computer), wherein the mobile terminal in this embodiment includes a processor 10, and a The memory 20 connected to the processor 10;

The memory 20 stores a frame down rate photographing program for implementing the frame down rate photographing method when the frame down rate photographing program is executed by the processor 10; as described above.

Embodiment 3

A storage medium, wherein the storage medium stores a frame down rate photographing program, and the frame down rate photographing program is used by the processor 10 to implement the down frame rate photographing method; specifically as described above.

FIG. 3 is a block diagram showing a specific structure of a mobile terminal according to an embodiment of the present invention. The mobile terminal can be used to implement the frame down rate photographing method provided in the foregoing embodiment. The mobile terminal 1200 can be a smartphone or a tablet.

As shown in FIG. 3, the mobile terminal 1200 may include an RF (Radio Frequency) circuit 110, a memory 120 including one or more (only one shown) computer-readable storage medium, an input unit 130, and a display unit. 140, sensor 150, audio circuit 160, transmission module 170, including processor 180 having one or more processing cores (only one shown) and power supply 190 and the like. It will be understood by those skilled in the art that the structure of the mobile terminal 1200 shown in FIG. 3 does not constitute a limitation of the mobile terminal 1200, and may include more or less components than those illustrated, or combine some components or different components. Arrangement. among them:

The RF circuit 110 is configured to receive and transmit electromagnetic waves, and realize mutual conversion between electromagnetic waves and electrical signals, thereby communicating with a communication network or other devices. The RF circuit 110 may include various existing circuit elements for performing these functions, such as an antenna, a radio frequency transceiver, a digital signal processor, an encryption/decryption chip, a Subscriber Identity Module (SIM) card, a memory, and the like. The RF circuit 110 can communicate with various networks such as the Internet, an intranet, a wireless network, or communicate with other devices over a wireless network. The wireless network described above may include a cellular telephone network, a wireless local area network, or a metropolitan area network. The above wireless networks may use various communication standards, protocols and technologies, including but not limited to global mobile communication systems (Global System for Mobile Communication, GSM), Enhanced Mobile Communication Technology (Enhanced Data GSM Environment, EDGE), Wideband Code Division Multiple Access (Wideband Code) Division Multiple Access, WCDMA), Code Division Multiple Access (Code Division) Access, CDMA), Time Division Multiple Access (TDMA), Wireless Fidelity (Wireless Fidelity, Wi-Fi) (such as the Institute of Electrical and Electronics Engineers Standard IEEE 802.11a, IEEE 802.11b, IEEE 802.11g and / or IEEE 802.11n), VoIP (Voice) Over Internet Protocol, VoIP), Worldwide Interoperability for Microwave Access (Worldwide Interoperability for Microwave Access, Wi-Max, other protocols for mail, instant messaging, and short messages, as well as any other suitable communication protocol, may even include protocols that are not currently being developed.

The memory 120 can be used to store software programs and modules, such as program instructions/modules corresponding to the frame down rate photographing method in the above embodiment, and the processor 180 executes various functional applications by running software programs and modules stored in the memory 120. Data processing, that is, the function of realizing frame down rate shooting. Memory 120 may include high speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid state memory. In some examples, memory 120 can further include memory remotely located relative to processor 180, which can be connected to mobile terminal 1200 via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

The input unit 130 can be configured to receive input numeric or character information and to generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function controls. In particular, input unit 130 can include touch-sensitive surface 131 as well as other input devices 132. Touch-sensitive surface 131, also referred to as a touch display or trackpad, can collect touch operations on or near the user (such as a user using a finger, stylus, etc., on any suitable object or accessory on touch-sensitive surface 131 or The operation near the touch-sensitive surface 131) and driving the corresponding connecting device according to a preset program. Alternatively, the touch-sensitive surface 131 can include two portions of a touch detection device and a touch controller. Wherein, the touch detection device detects the touch orientation of the user, and detects a signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts the touch information into contact coordinates, and sends the touch information. The processor 180 is provided and can receive commands from the processor 180 and execute them. In addition, the touch-sensitive surface 131 can be implemented in various types such as resistive, capacitive, infrared, and surface acoustic waves. In addition to the touch-sensitive surface 131, the input unit 130 can also include other input devices 132. Specifically, other input devices 132 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control buttons, switch buttons, etc.), trackballs, mice, joysticks, and the like.

The display unit 140 can be used to display information input by the user or information provided to the user and various graphical user interfaces of the mobile terminal 1200, which can be composed of graphics, text, icons, video, and any combination thereof. The display unit 140 may include a display panel 141, and optionally, an LCD (Liquid Crystal) Display, LCD), OLED (Organic The display panel 141 is configured in the form of a Light-Emitting Diode or the like. Further, the touch-sensitive surface 131 may cover the display panel 141, and when the touch-sensitive surface 131 detects a touch operation thereon or nearby, it is transmitted to the processor 180 to determine the type of the touch event, and then the processor 180 according to the touch event The type provides a corresponding visual output on display panel 141. Although in FIG. 3, touch-sensitive surface 131 and display panel 141 are implemented as two separate components to implement input and output functions, in some embodiments, touch-sensitive surface 131 can be integrated with display panel 141 for input. And output function.

Mobile terminal 1200 may also include at least one type of sensor 150, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor may include an ambient light sensor and a proximity sensor, wherein the ambient light sensor may adjust the brightness of the display panel 141 according to the brightness of the ambient light, and the proximity sensor may close the display panel 141 when the mobile terminal 1200 moves to the ear. And / or backlight. As a kind of motion sensor, the gravity acceleration sensor can detect the magnitude of acceleration in all directions (usually three axes). When it is stationary, it can detect the magnitude and direction of gravity. It can be used to identify the gesture of the mobile phone (such as horizontal and vertical screen switching, related Game, magnetometer attitude calibration), vibration recognition related functions (such as pedometer, tapping), etc.; as for the mobile terminal 1200 can also be configured with gyroscopes, barometers, hygrometers, thermometers, infrared sensors and other sensors, here No longer.

The audio circuit 160, the speaker 161, and the microphone 162 can provide an audio interface between the user and the mobile terminal 1200. The audio circuit 160 can transmit the converted electrical data of the received audio data to the speaker 161 for conversion to the sound signal output by the speaker 161; on the other hand, the microphone 162 converts the collected sound signal into an electrical signal by the audio circuit 160. After receiving, it is converted into audio data, and then processed by the audio data output processor 180, transmitted to the mobile terminal 110 via the RF circuit 110, or outputted to the memory 120 for further processing. The audio circuit 160 may also include an earbud jack to provide communication of the peripheral earphones with the mobile terminal 1200.

The mobile terminal 1200 can help the user to send and receive emails, browse web pages, access streaming media, etc. through the transmission module 170 (eg, Wi-Fi module), which provides wireless broadband Internet access to the user. Although FIG. 3 shows the transmission module 170, it can be understood that it does not belong to the essential configuration of the mobile terminal 1200, and may be omitted as needed within the scope of not changing the essence of the invention.

The processor 180 is a control center of the mobile terminal 1200 that connects various portions of the entire handset with various interfaces and lines, by running or executing software programs and/or modules stored in the memory 120, and recalling data stored in the memory 120. The various functions and processing data of the mobile terminal 1200 are executed to perform overall monitoring of the mobile phone. Optionally, the processor 180 may include one or more processing cores; in some embodiments, the processor 180 may integrate an application processor and a modem processor, wherein the application processor mainly processes an operating system, a user interface, and For applications, etc., the modem processor primarily handles wireless communications. It can be understood that the above modem processor may not be integrated into the processor 180.

The mobile terminal 1200 also includes a power source 190 (such as a battery) that powers the various components. In some embodiments, the power source can be logically coupled to the processor 180 through a power management system to manage charging, discharging, and power consumption through the power management system. Management and other functions. Power supply 190 may also include any one or more of a DC or AC power source, a recharging system, a power failure detection circuit, a power converter or inverter, a power status indicator, and the like.

Although not shown, the mobile terminal 1200 may further include a camera (such as a front camera, a rear camera), a Bluetooth module, and the like, and details are not described herein. Specifically, in this embodiment, the display unit of the mobile terminal is a touch screen display, the mobile terminal further includes a memory, and one or more programs, wherein one or more programs are stored in the memory and configured to be one or one The above processor executes one or more programs that include instructions for performing the following operations:

Obtain a preview frame rate of the current environment through camera preview, and collect exposure information of each frame of data in real time;

Determining, according to the exposure information and the preview frame rate, whether the current photographing environment is a low-light environment with a predetermined value;

When it is determined that the current photographing environment is a low-light environment with a predetermined value, the exposure parameter is modified according to a preset algorithm, and corresponding frame data is output according to the exposure parameter;

Frame data whose exposure time satisfies a predetermined value is selected, and an image is output through the selected frame data.

In some embodiments, the step of acquiring a preview frame rate of the current environment by using a camera preview and collecting exposure information of each frame of data in real time includes the following steps:

Get the preview frame rate of the current environment through camera preview;

The exposure information of each frame of data is collected in real time, and the exposure information includes an exposure time length, a sensitivity value, and an exposure stability flag.

In some embodiments, the predetermined value of the low light environment is determined to be:

The exposure time is greater than 1/17 second;

The sensitivity value is greater than 1200 degrees;

The preset frame rate is less than 15 frames;

If and only when the exposure time is greater than 1/17 second, the sensitivity value is greater than 1200 degrees, and the preset frame rate is less than 15 frames, it is determined that the current photographing environment is a low light environment.

In some embodiments, when it is determined that the current photographing environment is a non-low light environment, the normal photographing mode is continued.

In some embodiments, when it is determined that the current photographing environment is a low-light environment with a predetermined value, the step of modifying the exposure parameter according to the preset algorithm, and outputting the corresponding frame data according to the exposure parameter, specifically includes the following steps:

Obtaining an exposure duration, an exposure line number, and an exposure gain of the current frame when it is determined that the current photographing environment is a low-light environment with a predetermined value;

Calculating the frame down factor according to the exposure duration of the current frame;

Modifying the number of exposure lines and the exposure gain according to the frame down factor, and applying the modified number of exposure lines and exposure gain to the camera;

The camera takes a photo according to the modified exposure line number and exposure gain, and outputs frame data of the captured photo.

In some embodiments, the down frame factor, the modified number of exposure lines, and the modified exposure gain satisfy the following relationship:

The number of exposed exposure lines = the current number of exposure lines * the frame down factor;

Modified exposure gain = current exposure gain / frame down factor;

The frame down factor is a default value of 4;

When the current frame rate is divided by the default value of 4 and less than 4, the frame down factor is adjusted to the value of the current frame rate divided by 4, otherwise the frame down factor is the default value of 4.

In some embodiments, the step of selecting the frame data whose exposure time satisfies a predetermined value and outputting the image through the selected frame data specifically includes the following steps:

Obtaining all frame data of the shooting, and detecting whether the exposure time of each frame data satisfies a predetermined value;

When it is detected that the exposure time of the frame data satisfies a predetermined value, the frame data is selected, and an image is output.

In summary, the present invention discloses a frame dropping rate photographing method, a mobile terminal, and a storage medium. The method includes: obtaining a preview frame rate of a current environment through a camera preview, and collecting exposure information of each frame of data in real time; Determining, according to the exposure information and the preview frame rate, whether the current photographing environment is a low-light environment of a predetermined value; when determining that the current photographing environment is a low-light environment with a predetermined value, modifying the exposure parameter according to a preset algorithm, and according to the exposure The parameter outputs corresponding frame data; the frame data whose exposure time satisfies a predetermined value is selected, and the image is output through the selected frame data. By dynamically reducing the frame rate, the invention outputs high-quality photos with the original camera, and solves the problem of poor picture definition and noise in the low-light environment from the source, improves the quality of the photos, and is convenient for the user to use.

It is to be understood that the application of the present invention is not limited to the above-described examples, and those skilled in the art can make modifications and changes in accordance with the above description, all of which are within the scope of the appended claims.

Claims (20)

A method for photographing a frame down rate, wherein the method for photographing a frame down rate comprises: Obtain a preview frame rate of the current environment through camera preview, and collect exposure information of each frame of data in real time; Determining, according to the exposure information and the preview frame rate, whether the current photographing environment is a low-light environment with a predetermined value; When it is determined that the current photographing environment is a low-light environment with a predetermined value, the exposure parameter is modified according to a preset algorithm, and corresponding frame data is output according to the exposure parameter; Frame data whose exposure time satisfies a predetermined value is selected, and an image is output through the selected frame data. The frame dropping rate photographing method according to claim 1, wherein the step of acquiring a preview frame rate of the current environment by the camera preview and collecting the exposure information of each frame of data in real time comprises the following steps: Get the preview frame rate of the current environment through camera preview; The exposure information of each frame of data is collected in real time, and the exposure information includes an exposure time length, a sensitivity value, and an exposure stability flag. The frame down rate photographing method according to claim 1, wherein the predetermined value of the low light environment is determined as: The exposure time is greater than 1/17 second; The sensitivity value is greater than 1200 degrees; The preset frame rate is less than 15 frames; If and only when the exposure time is greater than 1/17 second, the sensitivity value is greater than 1200 degrees, and the preset frame rate is less than 15 frames, it is determined that the current photographing environment is a low light environment. The frame dropping rate photographing method according to claim 3, wherein when it is determined that the current photographing environment is a non-low light environment, the normal photographing mode is continued. The frame dropping rate photographing method according to claim 1, wherein when the low light environment in which the current photographing environment is determined to be a predetermined value is determined, the exposure parameter is modified according to a preset algorithm, and the corresponding frame is output according to the exposure parameter. The steps of the data include the following steps: Obtaining an exposure duration, an exposure line number, and an exposure gain of the current frame when it is determined that the current photographing environment is a low-light environment with a predetermined value; Calculating the frame down factor according to the exposure duration of the current frame; Modifying the number of exposure lines and the exposure gain according to the frame down factor, and applying the modified number of exposure lines and exposure gain to the camera; The camera takes a photo according to the modified exposure line number and exposure gain, and outputs frame data of the captured photo. The frame down rate photographing method according to claim 5, wherein the down frame factor, the modified number of exposure lines, and the modified exposure gain satisfy the following relationship: The number of exposed exposure lines = the current number of exposure lines * the frame down factor; Modified exposure gain = current exposure gain / frame down factor; The frame down factor is a default value of 4; When the current frame rate is divided by the default value of 4 and less than 4, the frame down factor is adjusted to the value of the current frame rate divided by 4, otherwise the frame down factor is the default value of 4. The frame down rate photographing method according to claim 1, wherein the step of selecting the frame data whose exposure time satisfies a predetermined value and outputting the image through the selected frame data comprises the following steps: Obtaining all frame data of the shooting, and detecting whether the exposure time of each frame data satisfies a predetermined value; When it is detected that the exposure time of the frame data satisfies a predetermined value, the frame data is selected, and an image is output. The frame down rate photographing method according to claim 7, wherein the predetermined value of the exposure time is 1/4 second. A mobile terminal, comprising: a processor, and a memory connected to the processor, wherein the memory stores a frame down rate photographing program, and the frame down rate photographing program is used by the processor to implement the following step: Obtain a preview frame rate of the current environment through camera preview, and collect exposure information of each frame of data in real time; Determining, according to the exposure information and the preview frame rate, whether the current photographing environment is a low-light environment with a predetermined value; When it is determined that the current photographing environment is a low-light environment with a predetermined value, the exposure parameter is modified according to a preset algorithm, and corresponding frame data is output according to the exposure parameter; Frame data whose exposure time satisfies a predetermined value is selected, and an image is output through the selected frame data. The mobile terminal of claim 9, wherein the step of acquiring a preview frame rate of the current environment by the camera preview and collecting the exposure information of each frame of data in real time comprises the following steps: Get the preview frame rate of the current environment through camera preview; The exposure information of each frame of data is collected in real time, and the exposure information includes an exposure time length, a sensitivity value, and an exposure stability flag. The mobile terminal according to claim 9, wherein the step of modifying an exposure parameter according to a preset algorithm and outputting corresponding frame data according to the exposure parameter when determining that the current photographing environment is a low light environment of a predetermined value Specifically, the following steps are included: Obtaining an exposure duration, an exposure line number, and an exposure gain of the current frame when it is determined that the current photographing environment is a low-light environment with a predetermined value; Calculating the frame down factor according to the exposure duration of the current frame; Modifying the number of exposure lines and the exposure gain according to the frame down factor, and applying the modified number of exposure lines and exposure gain to the camera; The camera takes a photo according to the modified exposure line number and exposure gain, and outputs frame data of the captured photo. The mobile terminal of claim 11, wherein the down frame factor, the modified number of exposure lines, and the modified exposure gain satisfy the following relationship: The number of exposed exposure lines = the current number of exposure lines * the frame down factor; Modified exposure gain = current exposure gain / frame down factor; The frame down factor is a default value of 4; When the current frame rate is divided by the default value of 4 and less than 4, the frame down factor is adjusted to the value of the current frame rate divided by 4, otherwise the frame down factor is the default value of 4. The mobile terminal according to claim 9, wherein the step of selecting the frame data whose exposure time satisfies a predetermined value and outputting the image through the selected frame data specifically includes the following steps: Obtaining all frame data of the shooting, and detecting whether the exposure time of each frame data satisfies a predetermined value; When it is detected that the exposure time of the frame data satisfies a predetermined value, the frame data is selected, and an image is output. A storage medium, wherein the storage medium stores a frame down rate photographing program, and the frame down rate photographing program is used by the processor to implement the following steps: Obtain a preview frame rate of the current environment through camera preview, and collect exposure information of each frame of data in real time; Determining, according to the exposure information and the preview frame rate, whether the current photographing environment is a low-light environment with a predetermined value; When it is determined that the current photographing environment is a low-light environment with a predetermined value, the exposure parameter is modified according to a preset algorithm, and corresponding frame data is output according to the exposure parameter; Frame data whose exposure time satisfies a predetermined value is selected, and an image is output through the selected frame data. The storage medium according to claim 14, wherein the step of acquiring a preview frame rate of the current environment by camera preview and collecting exposure information of each frame of data in real time comprises the following steps: Get the preview frame rate of the current environment through camera preview; The exposure information of each frame of data is collected in real time, and the exposure information includes an exposure time length, a sensitivity value, and an exposure stability flag. The storage medium of claim 14, wherein the predetermined value of the low light environment is determined to be: The exposure time is greater than 1/17 second; The sensitivity value is greater than 1200 degrees; The preset frame rate is less than 15 frames; If and only when the exposure time is greater than 1/17 second, the sensitivity value is greater than 1200 degrees, and the preset frame rate is less than 15 frames, it is determined that the current photographing environment is a low light environment. The storage medium according to claim 16, wherein when it is determined that the current photographing environment is a non-low light environment, the normal photographing mode is continued. The storage medium according to claim 14, wherein the step of modifying an exposure parameter according to a preset algorithm and outputting corresponding frame data according to the exposure parameter when determining that the current photographing environment is a low light environment of a predetermined value Specifically, the following steps are included: Obtaining an exposure duration, an exposure line number, and an exposure gain of the current frame when it is determined that the current photographing environment is a low-light environment with a predetermined value; Calculating the frame down factor according to the exposure duration of the current frame; Modifying the number of exposure lines and the exposure gain according to the frame down factor, and applying the modified number of exposure lines and exposure gain to the camera; The camera takes a photo according to the modified exposure line number and exposure gain, and outputs frame data of the captured photo. The storage medium of claim 18, wherein the down frame factor, the modified number of exposure lines, and the modified exposure gain satisfy the following relationship: The number of exposed exposure lines = the current number of exposure lines * the frame down factor; Modified exposure gain = current exposure gain / frame down factor; The frame down factor is a default value of 4; When the current frame rate is divided by the default value of 4 and less than 4, the frame down factor is adjusted to the value of the current frame rate divided by 4, otherwise the frame down factor is the default value of 4. The storage medium according to claim 14, wherein said step of selecting frame data whose exposure time satisfies a predetermined value and outputting an image through said selected frame data comprises the following steps: Obtaining all frame data of the shooting, and detecting whether the exposure time of each frame data satisfies a predetermined value; When it is detected that the exposure time of the frame data satisfies a predetermined value, the frame data is selected, and an image is output.