CN105141832A - Focusing abnormity processing method and mobile terminal - Google Patents

Abstract

The embodiment of the present invention relates to the field of electronic technology, and discloses a focusing abnormal processing method and a mobile terminal. Wherein, the method includes: when the mobile terminal determines that the effective focus distance has not been obtained, it will determine the preset effective focus distance as the effective focus distance, and then obtain the target distance between the target object and the camera of the mobile terminal. When the target distance is less than or equal to the preset effective focus distance, focus on the target object. Through the embodiments of the present invention, the problem that the mobile terminal cannot focus after the effective focusing distance is not obtained can be solved, and the focusing efficiency of the mobile terminal can be improved, so that clear pictures can be acquired quickly, and user experience can be improved.

Description

A focus exception processing method and mobile terminal

technical field

The invention relates to the field of electronic technology, in particular to a method for processing abnormal focus and a mobile terminal.

Background technique

Current mobile terminals such as smartphones, tablet computers, notebook computers, etc. will focus before using the camera to take pictures. Focusing methods in the prior art include phase focusing, contrast focusing, and laser focusing. Usually, in order to capture clearer pictures faster, laser focus is preferred. However, before adopting laser focusing, the mobile terminal needs to obtain its effective focusing distance first, and then obtain the distance to the subject, and laser focusing can only be performed on the subject within the effective focusing distance range.

In practice, it is found that before laser focusing, sometimes the effective focusing distance cannot be obtained, resulting in abnormal focusing, such as failure to focus, etc., resulting in unclear pictures obtained by the mobile terminal. It can be seen that how to deal with abnormal focus during the laser focusing process has become an urgent problem to be solved.

Contents of the invention

The embodiment of the invention discloses a focusing abnormality processing method and a mobile terminal, which can solve the technical problem of focusing abnormality during the laser focusing process and improve the focusing efficiency of the mobile terminal.

The first aspect of the embodiment of the present invention discloses a focusing abnormality processing method, which is applied to a mobile terminal. The mobile terminal includes a camera, and the camera includes a laser focusing module, including:

Determine whether the effective focus distance of the laser focus module is obtained;

If not obtained, then determine the preset effective focus distance as the effective focus distance of the laser focus module;

Obtain the target distance between the target subject and the camera;

judging whether the target distance is less than or equal to the preset effective focus distance;

If the target distance is less than or equal to the preset effective focus distance, focus on the target object.

Optionally, after the preset effective focus distance is determined as the effective focus distance of the laser focus module, the method further includes:

Acquiring the light intensity value of the environment where the mobile terminal is located;

Judging whether the light intensity value exceeds a preset light intensity threshold, if not, performing the step of acquiring the target distance between the target subject and the camera.

Optionally, the method also includes:

If the target distance is greater than the preset effective focus distance, a contrast focus mode is activated to focus on the target object.

Optionally, the method also includes:

If the light intensity value exceeds the preset light intensity threshold, a contrast focus mode is activated to focus on the target object.

Optionally, the focusing on the target object includes:

Determine the focus data for moving the camera to a focus position according to the target distance and a preset focus algorithm;

and moving the lens of the camera to the focus position according to the focus data.

Correspondingly, the second aspect of the embodiment of the present invention discloses a mobile terminal, the mobile terminal includes a camera, the camera includes a laser focusing module, and the mobile terminal further includes:

The first judging unit is used to judge whether the effective focusing distance of the laser focusing module is obtained;

A determination unit, configured to determine the preset effective focus distance as the effective focus distance of the laser focus module when the first judgment unit determines that the effective focus distance of the laser focus module has not been obtained;

an acquisition unit, configured to acquire the target distance between the target subject and the camera;

A second judging unit, configured to judge whether the target distance is less than or equal to the preset effective focus distance;

A focus unit, configured to focus on the target subject when the second determination unit determines that the target distance is less than or equal to the preset effective focus distance.

Optionally, the acquiring unit is further configured to acquire the light intensity value of the environment where the mobile terminal is located;

The first judging unit is further configured to judge whether the light intensity value exceeds a preset light intensity threshold, and if not, trigger the acquisition unit to perform the acquisition of the target distance between the target subject and the camera. operate.

Optionally, the mobile terminal also includes:

The first starting unit is configured to start a contrast focusing mode to focus on the target object when the second judging unit judges that the target distance is greater than the preset effective focus distance.

Optionally, the mobile terminal also includes:

The second starting unit is configured to start a contrast focusing mode to focus on the target object when the first judging unit judges that the light intensity value exceeds the preset light intensity threshold.

Optionally, the focusing unit includes a determining subunit and a moving subunit, wherein:

The determining subunit is configured to determine focus data for moving the camera to a focus position according to the target distance and a preset focus algorithm;

The moving subunit is configured to move the lens of the camera to the focus position according to the focus data.

Implementing the embodiment of the present invention has the following beneficial effects:

In the embodiment of the present invention, when the mobile terminal determines that the effective focus distance has not been obtained, it will determine the preset effective focus distance as the effective focus distance, and then obtain the target distance between the target subject and the camera of the mobile terminal. When the target distance is less than or equal to the preset effective focus distance, focus on the target object. Through the embodiments of the present invention, the problem that the mobile terminal cannot focus after the effective focusing distance is not acquired can be solved, and the focusing efficiency of the mobile terminal can be improved, so that clear pictures can be acquired quickly, and user experience can be improved.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

FIG. 1 is a schematic flowchart of a focusing abnormality processing method disclosed in an embodiment of the present invention;

Fig. 2 is a schematic flowchart of another focusing abnormality processing method disclosed in an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a mobile terminal disclosed in an embodiment of the present invention;

Fig. 4 is a schematic structural diagram of another mobile terminal disclosed by an embodiment of the present invention.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

The embodiment of the invention discloses a focusing abnormality processing method and a mobile terminal, which can solve the technical problem of focusing abnormality during the laser focusing process and improve the focusing efficiency of the mobile terminal. Each will be described in detail below.

Please refer to FIG. 1 . FIG. 1 is a schematic flowchart of a method for processing an abnormal focus disclosed by an embodiment of the present invention. Wherein, the method shown in Figure 1 can be applied to smart phones (such as Android phones, iOS phones, etc.), tablet computers, handheld computers, and mobile Internet devices (MobileInternetDevices, MID), personal digital assistants (PersonalDigitalAssistant, PDA), media players , smart TV, smart watch, smart glasses, smart bracelet and other mobile terminals, the mobile terminal includes a camera, and the camera includes a laser focusing module. As shown in FIG. 1, the method for handling an abnormal focus may include the following steps:

S101. The mobile terminal judges whether the effective focusing distance of the laser focusing module has been obtained. If yes, end the process; if not, execute step S102.

In the embodiment of the present invention, the effective focusing distance is the maximum distance at which the laser focusing module can achieve fast focusing and high focus definition. That is to say, within the effective focusing distance range, the laser focusing module can focus accurately and quickly.

In the embodiment of the present invention, because the laser focusing is affected by the spectrum, the current laser can only achieve fast and accurate focusing within a distance of about 40 cm. However, there may be slight deviations when different manufacturers write the data of the effective focus distance to the laser focus module produced. Therefore, the mobile terminal will first obtain the effective focus distance of the laser focus module before focusing.

In the embodiment of the present invention, after starting the camera application, the mobile terminal first obtains the focus data (ie, the effective focus distance) in the laser focus module of the camera. Therefore, the mobile terminal will judge whether to obtain the effective focusing distance of the laser focusing module.

Further, if the mobile terminal obtains the effective focus distance of the laser focus module, it can trigger the laser focus module to perform laser focus on the subject, so that a clearer picture can be taken; and if the mobile terminal does not obtain the The effective focusing distance of the laser focusing module cannot trigger the focusing of the laser focusing module, which means that the laser focusing module cannot be used to complete the focusing, thus making the mobile terminal unable to focus. Therefore, the mobile terminal determines the preset effective focusing distance as the effective focusing distance of the laser focusing module.

S102. The mobile terminal determines the preset effective focus distance as the effective focus distance of the laser focus module.

In the embodiment of the present invention, when the mobile terminal judges that it has not obtained the effective focusing distance of the laser focusing module, it indicates that the mobile terminal cannot trigger the laser focusing at present, that is, abnormal focusing occurs. Therefore, the mobile terminal will forcibly reject the Focusing data in the laser focus module (that is, the effective focus distance), and forcefully add the preset effective focus distance to the laser focus module as the new effective focus distance of the laser focus module.

Wherein, the preset effective focus distance is a focus distance calculated by the mobile terminal based on empirical values. Usually, the preset effective focus distance is smaller than the effective focus distance of the laser module to ensure that the written preset is valid. The value of the focus distance can meet the normal focus conditions of the laser focus module. However, the preset effective focus distance can also be the average effective focus distance of most laser focus modules. Specifically, this embodiment of the present invention does not make a limitation.

Further, after the mobile terminal determines the preset effective focus distance as the effective focus distance of the laser focus module, the mobile terminal can send the preset effective focus distance to the focus module to trigger the focus module to focus.

Specifically, by forcibly removing the focus data of the original effective focus distance, the focus data of the preset effective focus distance is added to the laser focus module, which can prevent the mobile terminal from failing to read when reading the effective focus distance. In this way, the laser focus can be guaranteed to be normal.

S103. The mobile terminal acquires a target distance between the target subject and the camera.

In the embodiment of the present invention, after the mobile terminal determines the preset effective focus distance as the effective focus distance of the laser focus module, the mobile terminal can obtain the effective focus distance of the laser focus module (that is, the preset effective focus distance distance), therefore, the laser will be used to calculate the target distance between the mobile terminal (specifically, the camera of the mobile terminal) and the target object.

Specifically, when the user clicks on the preview screen of the target object in the preview screen of the mobile terminal, the mobile terminal will generate a focus instruction for the target object, and then respond to the focus instruction, according to the target object in the The position in the preview image determines the direction of the target object, and then the target distance between the camera of the mobile terminal and the target object is determined by emitting laser light and receiving the reflected laser light. Specifically, it may be: acquire the time required by the mobile terminal from emitting the laser to receiving the reflected laser, and then calculate the target distance between the camera and the target object according to the acquired time.

S104, the mobile terminal judges whether the target distance is less than or equal to the preset effective focus distance, if yes, execute step S105; if not, end this process.

In the embodiment of the present invention, after acquiring the target distance between the target subject and the camera, the mobile terminal will further determine whether the target distance is within the preset effective focus distance range (that is, determine whether the target distance is less than or equal to The preset effective focus distance), if it is within the preset effective focus distance range, it can be determined that the mobile terminal can accurately focus on the target object; and if the target distance is not within the preset effective focus distance range , it indicates that even if laser focusing is adopted, the target subject cannot be clearly seen, and therefore, the mobile terminal will end this process.

S105. The mobile terminal focuses on the target object, and ends this process.

In the embodiment of the present invention, when the mobile terminal determines that the target distance between the target object and the camera is less than or equal to the preset effective focus distance, the mobile terminal can perform laser focusing on the target object. That is to say, the mobile terminal will trigger the motor in the camera to work to adjust the direction and moving position of the lens of the camera.

Further, after the laser focusing on the target object is completed, the mobile terminal can quickly take pictures of the target object, and the obtained pictures will be relatively clear.

As a feasible implementation manner, the specific manner in which the mobile terminal focuses on the target object may include the following steps:

Step 11) Determine the focus data for moving the camera to the focus position according to the target distance and the preset focus algorithm.

In a specific implementation, autofocus (AutoFocus, AF) is one of the core issues of a digital imaging system. By using images acquired by a camera as an information source, the information is analyzed and processed, thereby realizing autofocus. At present, the common autofocus algorithms mainly include Depth from Focusing (DFF), Depth From Defocus (DFD), auto focus algorithm based on DSP (Digital Signal Process, digital signal processing), based on ISP (Image Signal Processor, image signal processing device) autofocus algorithm and so on. DFF is an autofocus method based on a search algorithm. It evaluates the sharpness of images at different positions through an evaluation function, and uses the feature that the correct focus position is the clearest to find the correct focus position. Usually, this method requires 10 to 12 images to accurately find the focus position. DFD is a method of obtaining depth information from defocused images to complete autofocus. This method only needs to obtain 2 to 3 images under different imaging hardware specifications to complete the autofocus process. It can be seen that in the existing auto-focus algorithm, according to two images at different defocus positions, the focus position when shooting the target area can be deduced, so as to control the lens to complete auto-focus. It should be noted that the embodiment of the present invention does not limit the specific focusing algorithm, which can be set according to actual needs in specific implementation.

Therefore, the mobile terminal determines the captured image according to the target distance between the target subject and the camera, and then analyzes the sharpness of the captured image, so that it can determine the clearest time of the captured image according to the sharpness and the preset focus algorithm. The focus data corresponding to the correct focus position. That is to say, the mobile terminal can determine the focus data required when moving the lens of the camera to the focus position of the camera according to the target distance and the preset focus algorithm. Wherein, the focusing data may be the step size and moving direction that the lens of the camera needs to move, it may also be the focus position, and it may also be the input voltage or current required by the motor of the camera, and the voltage or current is used to drive the lens to Move the specified step in the specified direction of movement. Specifically, this embodiment of the present invention does not make a limitation.

Step 12) Move the lens of the camera to the focus position according to the focus data.

In a specific implementation, after the mobile terminal determines the focus data for moving the camera to the correct focus position, it can move the lens of the camera according to the focus data to achieve the best focus position.

Wherein, the mobile terminal controls the lens of the camera to move to the correct focusing position according to the determined lens moving direction and step size, or the input current or input voltage of the motor, so that the acquired target object is clearer.

It can be seen that in the method described in FIG. 1 , when the mobile terminal determines that the effective focus distance has not been obtained, it will determine the preset effective focus distance as the effective focus distance, and then obtain the distance between the target subject and the camera of the mobile terminal. Target distance, when it is judged that the target distance is less than or equal to the preset effective focus distance, focus on the target object. Through the embodiments of the present invention, the problem that the mobile terminal cannot focus after the effective focusing distance is not acquired can be solved, and the focusing efficiency of the mobile terminal can be improved, so that clear pictures can be acquired quickly, and user experience can be improved.

Please refer to FIG. 2 . FIG. 2 is a schematic flowchart of another focusing abnormality handling method disclosed in an embodiment of the present invention. Wherein, the method shown in Figure 2 can be applied to smart phones (such as Android phones, iOS phones, etc.), tablet computers, handheld computers and mobile Internet devices, personal digital assistants, media players, smart TVs, smart watches, smart glasses, A mobile terminal such as a smart bracelet, the mobile terminal includes a camera, and the camera includes a laser focusing module. As shown in FIG. 2, the method for handling abnormal focus may include the following steps:

S201. The mobile terminal judges whether the effective focusing distance of the laser focusing module is acquired, and if yes, ends the process; if not, executes step S202.

S202. The mobile terminal determines the preset effective focus distance as the effective focus distance of the laser focus module.

S203. The mobile terminal acquires the light intensity value of the environment where it is located.

In the embodiment of the present invention, when the mobile terminal adds the preset effective focus distance to the laser focus module as the effective focus distance of the laser focus module, it will further obtain the light intensity value of the environment where the mobile terminal is located . Specifically, the light intensity value of the surrounding environment may be collected through a light sensing module of the mobile terminal or the like. Since laser focusing can focus faster and more accurately in a darker environment, its focusing advantage will be more obvious than other focusing methods. Therefore, the mobile terminal obtains the light intensity value of its environment mainly to ensure the focusing efficiency and reliability of laser focusing.

S204, the mobile terminal judges whether the light intensity value exceeds a preset light intensity threshold, if not, execute step S205; if yes, execute step S208.

In the embodiment of the present invention, when the light intensity value of the environment where the mobile terminal is located is acquired, the mobile terminal will judge whether the light intensity value exceeds a preset light intensity threshold. Wherein, the preset light intensity threshold is the light intensity critical value at which the laser focusing module can focus quickly, reliably and accurately.

Further, when it is judged that the light intensity value exceeds the preset light intensity threshold value, it indicates that the use of laser focusing in this environment cannot achieve a good focusing effect, so the mobile terminal will start the contrast focus mode to focus on the target. and when it is judged that the light intensity value does not exceed the preset light intensity threshold, it indicates that the advantages of laser focusing can be well utilized in this environment, so the mobile terminal will further obtain the camera and The target distance between the target shooting objects, so that the target shooting objects can be focused on later.

S205. The mobile terminal acquires a target distance between the target subject and the camera.

S206. The mobile terminal judges whether the target distance is less than or equal to the preset effective focus distance. If yes, execute step S207; if not, execute step S208.

S207. The mobile terminal focuses on the target object, and ends this process.

S208. The mobile terminal starts the contrast focus mode to focus on the target subject, and ends the process.

In the embodiment of the present invention, when the mobile terminal determines that the light intensity value of its environment exceeds the preset light intensity threshold, or determines that the target distance between the target subject and the camera of the mobile terminal is greater than the preset effective focus distance , the mobile terminal can start the contrast focus mode to focus on the target object.

Wherein, since the phase focus mode is not compatible with the laser focus mode, when the laser focus of the mobile terminal cannot be used, starting the contrast focus mode can quickly focus on the target object. Wherein, when the mobile terminal starts the contrast focus mode, in order to reduce system resource consumption, the laser focus mode can be forcibly turned off.

Further, when the mobile terminal activates the contrast focus mode for focusing, the laser focus mode can be turned off, so as to reduce system power consumption and improve the operating efficiency of the mobile terminal.

It can be seen that in the method described in FIG. 2, the mobile terminal cannot be used normally when the laser focusing is started (that is, the distance between the target subject and the camera is greater than the effective focusing distance, or the light intensity of the environment where the mobile terminal is located is too strong to cause the laser When the focus cannot be used normally), the contrast focus mode can be activated to focus on the target object, thereby preventing the user from restarting the camera, ensuring normal focus of the mobile terminal, improving focus efficiency, and improving user experience.

Please refer to FIG. 3 . FIG. 3 is a schematic structural diagram of a mobile terminal disclosed in an embodiment of the present invention. Wherein, the mobile terminal 300 shown in Figure 3 may include but not limited to smart phones (such as Android phones, iOS phones, etc.), tablet computers, palmtop computers and mobile Internet devices, personal digital assistants, media players, smart TVs, smart watches , smart glasses, smart bracelet, etc., and the mobile terminal includes a camera, and the camera is equipped with a laser focusing module. As shown in Figure 3, the mobile terminal 300 may include the following units:

The first judging unit 301 is configured to judge whether the effective focusing distance of the laser focusing module is obtained.

In the embodiment of the present invention, the effective focusing distance is the maximum distance at which the laser focusing module can achieve fast focusing and high focus definition. That is to say, within the effective focusing distance range, the laser focusing module can focus accurately and quickly.

In the embodiment of the present invention, because the laser focusing is affected by the spectrum, the current laser can only achieve fast and accurate focusing within a distance of about 40 cm. However, there may be slight deviations when different manufacturers write the data of the effective focus distance to the laser focus modules produced. Therefore, the mobile terminal 300 will obtain the effective focus distance of the laser focus module before focusing.

In the embodiment of the present invention, after starting the camera application, the mobile terminal 300 first obtains the focus data (ie, the effective focus distance) in the laser focus module of the camera. Therefore, the first judging unit 301 judges whether the effective focusing distance of the laser focusing module is obtained.

Further, if the first judging unit 301 judges that the mobile terminal 300 has acquired the effective focusing distance of the laser focusing module, it can trigger the laser focusing module to perform laser focusing on the subject, so that a clearer picture can be taken; And if the first judging unit 301 judges that the mobile terminal 300 has not acquired the effective focusing distance of the laser focusing module, it cannot trigger the laser focusing module to focus, which means that the laser focusing module cannot be used to complete the focusing, so that the mobile The terminal cannot focus. Therefore, the determination unit 302 determines the preset effective focus distance as the effective focus distance of the laser focus module.

The determination unit 302 is configured to determine the preset effective focus distance as the effective focus distance of the laser focus module when the first determination unit 301 determines that the effective focus distance of the laser focus module has not been acquired.

In the embodiment of the present invention, when the first judging unit 301 judges that it has not acquired the effective focusing distance of the laser focusing module, it indicates that the mobile terminal 300 cannot trigger laser focusing at present, that is, abnormal focusing occurs. Therefore, the determining unit 302 The focusing data (that is, the effective focusing distance) in the laser focusing module will be forcibly deleted, and the preset effective focusing distance will be added to the laser focusing module as the new effective focusing distance of the laser focusing module.

Wherein, the preset effective focus distance is a focus distance calculated by the mobile terminal based on empirical values. Usually, the preset effective focus distance is smaller than the effective focus distance of the laser module to ensure that the written preset is valid. The value of the focus distance can meet the normal focus conditions of the laser focus module. However, the preset effective focus distance can also be the average effective focus distance of most laser focus modules. Specifically, this embodiment of the present invention does not make a limitation.

Further, after the determination unit 302 mobile terminal determines the preset effective focus distance as the effective focus distance of the laser focus module, the mobile terminal 300 can send the preset effective focus distance to the focus module to trigger the focus module to focus.

Specifically, by forcibly removing the focus data of the original effective focus distance, the focus data of the preset effective focus distance is added to the laser focus module, which can prevent the mobile terminal 300 from failing to read the effective focus distance In this case, it can ensure that the laser focus is normal.

The acquiring unit 303 is configured to acquire the target distance between the target subject and the camera.

In the embodiment of the present invention, after the determination unit 302 determines the preset effective focus distance as the effective focus distance of the laser focus module, the acquisition unit 303 can acquire the effective focus distance of the laser focus module (that is, the preset Effective focusing distance), therefore, the target distance between the mobile terminal 300 (specifically, the camera of the mobile terminal) and the target object will be calculated by using laser light.

Specifically, when the user clicks on the preview screen of the target object in the preview screen of the mobile terminal 300, the mobile terminal 300 will generate a focus instruction for the target object, and then respond to the focus instruction to shoot according to the target. The position of the object in the preview screen determines the direction of the target object, and then the target distance between the camera of the mobile terminal and the target object is determined by emitting laser light and receiving the reflected laser light. Specifically, the obtaining unit 303 obtains the time required by the mobile terminal from emitting the laser light to receiving the reflected laser light, and then calculates the target distance between the camera and the target object according to the obtained time.

The second judging unit 304 is configured to judge whether the target distance acquired by the acquiring unit 303 is less than or equal to the preset effective focus distance.

In the embodiment of the present invention, after the acquiring unit 303 acquires the target distance between the target subject and the camera, the second judging unit 304 will further judge whether the target distance is within the preset effective focus distance range (that is, judge the Whether the target distance is less than or equal to the preset effective focus distance), if it is within the preset effective focus distance range, it can be determined that the mobile terminal 300 can perform accurate laser focusing on the target object; and if the target distance is not within the preset effective focus distance If it is set within the effective focus distance range, it means that even if the laser focus is used, the target object cannot be clearly seen. Therefore, the mobile terminal 300 does not perform any operation.

The focus unit 305 is configured to focus on the target subject when the second determination unit 304 determines that the target distance is less than or equal to the preset effective focus distance.

In the embodiment of the present invention, when the second judging unit 304 judges that the target distance between the target object and the camera is less than or equal to the preset effective focus distance, the focusing unit 305 can perform laser focusing on the target object. That is to say, the focusing unit 305 will trigger the motor in the camera to adjust the direction and moving position of the lens of the camera.

Furthermore, after the laser focusing on the target object is completed, the mobile terminal 300 can quickly take pictures of the target object, and the obtained pictures will be relatively clear.

It can be seen that in the mobile terminal described in FIG. 3 , when the mobile terminal determines that no effective focus distance has been obtained, it will determine the preset effective focus distance as the effective focus distance, and then obtain the distance between the target object and the camera of the mobile terminal. When it is judged that the target distance is less than or equal to the preset effective focus distance, the target object is focused. Through the embodiments of the present invention, the problem that the mobile terminal cannot focus after the effective focusing distance is not acquired can be solved, and the focusing efficiency of the mobile terminal can be improved, so that clear pictures can be acquired quickly, and user experience can be improved.

Please refer to FIG. 4 . FIG. 4 is a schematic structural diagram of another mobile terminal disclosed in an embodiment of the present invention. Wherein, the mobile terminal 300 shown in FIG. 4 is obtained by optimizing the mobile terminal 300 shown in FIG. 3 . As shown in Figure 4, the mobile terminal 300 may also include:

In the embodiment of the present invention, the acquisition unit 303 is further configured to acquire the light intensity value of the environment where the mobile terminal 300 is located.

In specific implementation, when the determination unit 302 adds the preset effective focus distance to the laser focus module as the effective focus distance of the laser focus module, the acquisition unit 303 will further acquire the environment where the mobile terminal 300 is located. light intensity value. Specifically, the light intensity value of the surrounding environment may be collected through the light sensing module of the mobile terminal 300 or the like. Since laser focusing can focus faster and more accurately in a darker environment, its focusing advantage will be more obvious than other focusing methods. Therefore, the acquisition unit 303 acquires the light intensity value of its environment mainly to ensure the focusing efficiency and reliability of laser focusing.

In the embodiment of the present invention, the first judging unit 301 is further configured to judge whether the light intensity value acquired by the acquiring unit 303 exceeds a preset light intensity threshold.

In a specific implementation, when the acquiring unit 303 acquires the light intensity value of the environment where the mobile terminal 300 is located, the first judging unit 301 will judge whether the light intensity value exceeds a preset light intensity threshold. Wherein, the preset light intensity threshold is the light intensity critical value at which the laser focusing module can focus quickly, reliably and accurately.

Further, when the first judging unit 301 judges that the light intensity value exceeds the preset light intensity threshold value, it indicates that the use of laser focusing in this environment cannot achieve a good focusing effect, so the starting unit 306 will start the contrast mode focus mode to focus on the target object; and when the first judging unit 301 judges that the light intensity value does not exceed the preset light intensity threshold, it indicates that the advantages of laser focusing can be well utilized in this environment, so , the acquiring unit 303 will further acquire the target distance between the camera and the target object, so as to focus on the target object subsequently.

In the embodiment of the present invention, the mobile terminal also includes:

The starting unit 306 is configured to start the contrast focusing mode to focus on the target object.

In the embodiment of the present invention, when the first judging unit 301 judges that the light intensity value of the environment where the mobile terminal 300 is located exceeds the preset light intensity threshold, or the second judging unit 304 judges that the target subject and the mobile terminal 300 When the target distance between the cameras is greater than the preset effective focus distance, the activation unit 306 can activate the contrast focus mode to focus on the target object.

Wherein, since the phase focus mode is not compatible with the laser focus mode, when the laser focus of the mobile terminal 300 cannot be used, the activation unit 306 activates the contrast focus mode to quickly focus on the target object. Wherein, when the starting unit 306 starts the contrast focusing mode, in order to reduce system resource consumption, the laser focusing mode may be forcibly turned off.

Further, when starting the contrast focusing mode for focusing, the starting unit 306 can turn off the laser focusing mode, so as to reduce the power consumption of the system and improve the operating efficiency of the mobile terminal.

It should be noted that the operations performed by the activation unit 306 in the embodiment of the present invention are the operations performed by the first activation unit and the second activation unit appearing in the claims.

In the embodiment of the present invention, the focusing unit 305 may include a determining subunit 3051 and a moving subunit 3052, wherein:

The determining subunit 3051 is configured to determine focus data for moving the camera to a focus position according to the target distance and a preset focus algorithm.

In a specific implementation, autofocus (AutoFocus, AF) is one of the core issues of a digital imaging system. By using images acquired by a camera as an information source, the information is analyzed and processed, thereby realizing autofocus. At present, the common autofocus algorithms mainly include Depth from Focusing (DFF), Depth From Defocus (DFD), auto focus algorithm based on DSP (Digital Signal Process, digital signal processing), and auto focus algorithm based on ISP (Image Signal Processor, image signal processing). device) autofocus algorithm and so on. DFF is an autofocus method based on a search algorithm. It evaluates the sharpness of images at different positions through an evaluation function, and uses the feature that the correct focus position is the clearest to find the correct focus position. Usually, this method requires 10 to 12 images to accurately find the focus position. DFD is a method of obtaining depth information from defocused images to complete autofocus. This method only needs to obtain 2 to 3 images under different imaging hardware specifications to complete the autofocus process. It can be seen that in the existing auto-focus algorithm, according to two images at different defocus positions, the focus position when shooting the target area can be deduced, so as to control the lens to complete auto-focus. It should be noted that the embodiment of the present invention does not limit the specific focusing algorithm, which can be set according to actual needs in specific implementation.

Therefore, the determining subunit 3051 determines the captured image according to the target distance between the target subject and the camera, and then analyzes the clarity of the captured image, so that the captured image can be determined to be the clearest according to the clarity and the preset focus algorithm The focus data corresponding to the correct focus position at that time. That is to say, the determination subunit 3051 can determine the focus data required when moving the lens of the camera to the focus position of the camera according to the target distance and the preset focus algorithm. Wherein, the focusing data may be the step size and moving direction that the lens of the camera needs to move, it may also be the focus position, and it may also be the input voltage or current required by the motor of the camera, and the voltage or current is used to drive the lens toward Move the specified step in the specified direction of movement. Specifically, this embodiment of the present invention does not make a limitation.

The moving subunit 3052 is configured to move the lens of the camera to the focus position according to the focus data determined by the determination subunit 3061 .

In a specific implementation, after the determination subunit 3061 determines the focus data for moving the camera to the correct focus position, the movement subunit 3052 can move the lens of the camera according to the focus data to achieve the best focus position.

Wherein, the moving subunit 3052 controls the lens of the camera to move to the correct focus position according to the determined lens moving direction and step size, or the input current or input voltage of the motor, so that the acquired target object is clearer.

It can be seen that in the mobile terminal described in Figure 4, the mobile terminal cannot be used normally when the laser focus is started (that is, the distance between the target object and the camera is greater than the effective focusing distance, or the light intensity of the environment where the mobile terminal is located is too strong to cause When the laser focus cannot be used normally), the contrast focus mode can be activated to focus on the target object, thereby preventing the user from restarting the camera, ensuring the normal focus of the mobile terminal, improving focus efficiency, and improving user experience.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented through computer programs to instruct related hardware, and the programs can be stored in a computer-readable storage medium. During execution, it may include the processes of the embodiments of the above-mentioned methods. Wherein, the storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM) or a random access memory (Random Access Memory, RAM) and the like.

The above disclosures are only preferred embodiments of the present invention, and certainly cannot limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope of the present invention.

Claims (10)

1. A focus abnormal processing method applied to a mobile terminal, the mobile terminal comprising a camera, the camera comprising a laser focusing module, characterized in that the method comprises: Determine whether the effective focus distance of the laser focus module is obtained; If not obtained, then determine the preset effective focus distance as the effective focus distance of the laser focus module; Obtain the target distance between the target subject and the camera; judging whether the target distance is less than or equal to the preset effective focus distance; If the target distance is less than or equal to the preset effective focus distance, focus on the target object. 2. The method according to claim 1, wherein after the preset effective focus distance is determined as the effective focus distance of the laser focus module, the method further comprises: Acquiring the light intensity value of the environment where the mobile terminal is located; Judging whether the light intensity value exceeds a preset light intensity threshold, if not, performing the step of acquiring the target distance between the target subject and the camera. 3. The method according to claim 1 or 2, characterized in that the method further comprises: If the target distance is greater than the preset effective focus distance, a contrast focus mode is activated to focus on the target object. 4. The method according to claim 2, characterized in that the method further comprises: If the light intensity value exceeds the preset light intensity threshold, a contrast focus mode is activated to focus on the target object. 5. The method according to claim 1, wherein the focusing on the target object comprises: Determine the focus data for moving the camera to a focus position according to the target distance and a preset focus algorithm; and moving the lens of the camera to the focus position according to the focus data. 6. A mobile terminal, the mobile terminal comprising a camera, the camera comprising a laser focusing module, characterized in that the mobile terminal also comprises: The first judging unit is used to judge whether the effective focusing distance of the laser focusing module is obtained; A determination unit, configured to determine the preset effective focus distance as the effective focus distance of the laser focus module when the first judgment unit determines that the effective focus distance of the laser focus module has not been obtained; an acquisition unit, configured to acquire the target distance between the target subject and the camera; A second judging unit, configured to judge whether the target distance is less than or equal to the preset effective focus distance; A focus unit, configured to focus on the target subject when the second determination unit determines that the target distance is less than or equal to the preset effective focus distance. 7. The mobile terminal according to claim 6, characterized in that, The acquiring unit is further configured to acquire the light intensity value of the environment where the mobile terminal is located; The first judging unit is further configured to judge whether the light intensity value exceeds a preset light intensity threshold, and if not, trigger the acquisition unit to perform the acquisition of the target distance between the target subject and the camera. operate. 8. The mobile terminal according to claim 6 or 7, wherein the mobile terminal further comprises: The first starting unit is configured to start a contrast focusing mode to focus on the target object when the second judging unit judges that the target distance is greater than the preset effective focus distance. 9. The mobile terminal according to claim 7, wherein the mobile terminal further comprises: The second starting unit is configured to start a contrast focusing mode to focus on the target object when the first judging unit judges that the light intensity value exceeds the preset light intensity threshold. 10. The mobile terminal according to claim 6, wherein the focusing unit comprises a determining subunit and a moving subunit, wherein: The determining subunit is configured to determine focus data for moving the camera to a focus position according to the target distance and a preset focus algorithm; The moving subunit is configured to move the lens of the camera to the focus position according to the focus data.