WO2017054752A1

WO2017054752A1 - Method and device for correcting focal point and method and device for implementing focusing

Info

Publication number: WO2017054752A1
Application number: PCT/CN2016/100791
Authority: WO
Inventors: 张圣杰
Original assignee: 努比亚技术有限公司
Priority date: 2015-09-30
Filing date: 2016-09-29
Publication date: 2017-04-06
Also published as: CN105208279B; CN105208279A

Abstract

A method and device for correcting a focal point, the method comprising: according to a focal point correction instruction from a user, acquiring a position of a movable lens when a distance between a camera pair and a camera is an object focus of a focal distance in the focal point correction instruction; and saving a correlation between the focal distance in the focal point correction instruction and the obtained position of the movable lens. According to the solution of the embodiments of the present application, by acquiring a position of a movable lens when a distance between a camera pair and a camera is an object focus of a focal distance in a focal point correction instruction and saving a focal point of a corrected camera, the phenomenon of inaccurate focusing occurring during a manual focusing process of a user is solved, thereby improving the focusing accuracy during the manual focusing process of the user.

Description

Method and device for correcting focus and method and device for realizing focus

Technical field

Embodiments of the present invention relate to, but are not limited to, terminal technologies, and in particular, to a method and apparatus for correcting focus and a method and apparatus for achieving focus.

Background technique

A method for realizing manual focusing in the related art generally includes: receiving a manual focus command from a user, and finding a movable lens position corresponding to a focal length in a manual focus command in a correspondence relationship between a preset focal length and a movable lens position ; Get the current position of the lens, and focus according to the current position of the obtained lens and the position of the movable lens that is found.

In the method of realizing manual focusing in the related art, since the correspondence between the preset focal length and the movable lens position is provided by the module manufacturer. In the process of installing the movable lens to the mobile terminal, assembly errors often occur, which causes the data in the corresponding relationship to be inconsistent with the actual, or the corresponding relationship provided by the original manufacturer of the module itself has a certain error. This will cause the user to have a problem of inaccurate focus during manual focusing. Therefore, it is necessary to correct the focus of the lens, that is, the position of the movable lens corresponding to the focus distance to be corrected, so that the user can focus accurately during manual focusing. There is no effective correction method in the related art.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

Embodiments of the present invention provide a method and apparatus for correcting focus and a method and apparatus for implementing focus, which can improve the accuracy of focusing of a user during manual focusing.

The embodiment of the invention provides a method for correcting focus, including:

Acquiring the position of the movable lens when the object is in focus with the focal length in the focus correction command according to the focus correction command from the user;

The correspondence between the focal length in the focus correction command and the position of the obtained movable lens is saved.

Preferably, the obtaining, by the focus correction instruction from the user, the position of the movable lens when the distance between the camera and the camera is the focal length in the focus correction command is included:

Taking the focal length in the focus correction instruction as an initial default position, respectively placing the movable lens at different positions, and acquiring preview frame data of the object at different positions;

Acquiring the position of the movable lens corresponding to the preview image data with the sharpest degree of sharpness of the edge of the object in each obtained preview frame data.

Optionally, the method further includes: updating a default value of the focal length by using corresponding distance data of the movable lens corresponding to the sharpest preview frame data of the edge of the object.

Preferably, the correspondence is saved to a non-erasable partition.

Preferably, when receiving a manual focus command from the user, the method further comprises:

Searching, in the correspondence relationship, a position of the movable lens corresponding to the focal length in the manual focus command;

Obtaining a current position of the movable lens;

Focusing is performed based on the current position of the movable lens obtained and the position of the movable lens that is found.

An embodiment of the present invention further provides a method for implementing focus, including:

Acquiring the position of the movable lens when the object is in focus with the focal length in the focus correction command according to the focus correction command from the user; saving the focal length in the focus correction command and the obtained position of the movable lens Correspondence between them;

When receiving a manual focus command from the user, the method further includes:

Obtaining a current position of the movable lens;

Optionally, the position of the movable lens when the acquisition camera focuses on the focal length of the focus correction command with the camera includes:

Optionally, the method further includes: saving the correspondence to a non-erasable partition

The embodiment of the invention further provides an apparatus for correcting focus, which at least includes:

Obtaining a module, configured to acquire, according to a focus correction instruction from the user, a position of the movable lens when the object with the focal length in the focus correction command is the distance between the camera and the camera;

The storage module is configured to save a correspondence between a focal length in the focus correction command and a position of the obtained movable lens.

Preferably, the obtaining module is specifically configured to:

Obtaining a position of the movable lens corresponding to the preview frame data having the largest sharpness of the edge of the object in each obtained preview frame data.

Preferably, the storage module is specifically configured to:

Save the correspondence to a non-erasable partition.

Preferably, the method further includes: a receiving module, a focusing module; wherein

a receiving module configured to receive a manual focus command from the user;

a search module configured to search for a position of the movable lens corresponding to a focal length in the manual focus command in the correspondence relationship;

The focus module is set to focus according to the current position of the obtained movable lens and the position of the found movable lens.

The embodiment of the invention further provides an apparatus for implementing focusing, comprising:

Obtaining a module, configured to acquire, according to a focus correction instruction from the user, a position of the movable lens when the distance between the camera and the camera is the focal length in the focus correction command;

a storage module configured to save the focal length in the focus correction command and the obtained position of the movable lens Correspondence between sets;

a receiving module, configured to notify the module when receiving a manual focus command from the user;

a search module, configured to search for a position of the movable lens corresponding to a focal length in the manual focus command in a correspondence relationship of the storage module;

Optionally, the acquiring module is specifically configured to:

Optionally, the storage module is specifically configured to: save the correspondence to a non-erasable partition.

The embodiment of the present invention further provides a computer readable storage medium storing computer executable instructions for performing the method of correcting focus according to any of the above, and/or for performing the above A method of achieving focusing as described in any of the above.

Compared with the prior art, the embodiment of the present invention includes: acquiring, according to a focus correction instruction from a user, a position of the movable lens when the distance between the camera and the camera is the focal length in the focus correction command; the focus correction is saved; The correspondence between the focal length in the command and the position of the obtained movable lens. The solution of the embodiment of the present invention solves the problem that the user is manually focusing by acquiring the position of the movable lens when the distance between the camera and the camera is the focal length in the focus correction command, and saving the position of the lens. The phenomenon of inaccurate focus during the process improves the accuracy of the user's focus during manual focusing.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

The drawings described herein are provided to provide a further understanding of the invention, and are in the Improperly qualified. In the drawing:

1 is a schematic structural diagram of hardware of a mobile terminal that implements various embodiments of the present invention;

2 is a schematic diagram of a wireless communication system of the mobile terminal shown in FIG. 1;

3 is a flowchart of a method for correcting focus in an embodiment of the present invention;

4 is a schematic view of focus and out of focus in an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a device for correcting focus in an embodiment of the present invention.

The implementation, functional features, and advantages of the present invention will be further described in conjunction with the embodiments.

Preferred embodiment of the invention

It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

A mobile terminal embodying various embodiments of the present invention will now be described with reference to the accompanying drawings. In the following description, the use of suffixes such as "module", "component" or "unit" for indicating an element is merely an explanation for facilitating the present invention, and does not have a specific meaning per se. Therefore, "module" and "component" can be used in combination.

The mobile terminal can be implemented in various forms. For example, the terminal described in the present invention may include, for example, a mobile phone, a smart phone, a notebook computer, a digital broadcast receiver, a PDA (Personal Digital Assistant), a PAD (Tablet), a PMP (Portable Multimedia Player), a navigation device, etc. Mobile terminals and fixed terminals such as digital TVs, desktop computers, and the like. In the following, it is assumed that the terminal is a mobile terminal. However, those skilled in the art will appreciate that configurations in accordance with embodiments of the present invention can be applied to fixed type terminals in addition to components that are specifically for mobile purposes.

FIG. 1 is a schematic diagram showing the hardware structure of a mobile terminal embodying various embodiments of the present invention.

The mobile terminal 100 may include a wireless communication unit 110, an A/V (Audio/Video) input unit 120, a user input unit 130, a sensing unit 140, an output unit 150, a memory 160, an interface unit 170, a controller 180, and a power supply unit 190. and many more. Figure 1 illustrates a mobile terminal having various components, but it should be understood that not all illustrated components are required to be implemented. More or fewer components can be implemented instead. The elements of the mobile terminal will be described in detail below.

Wireless communication unit 110 typically includes one or more components that permit radio communication between mobile terminal 100 and a wireless communication system or network. For example, the wireless communication unit may include at least one of a broadcast receiving module 111, a mobile communication module 112, a wireless internet module 113, a short-range communication module 114, and a location information module 115.

The broadcast receiving module 111 receives a broadcast signal and/or broadcast associated information from an external broadcast management server via a broadcast channel. The broadcast channel can include a satellite channel and/or a terrestrial channel. The broadcast management server may be a server that generates and transmits a broadcast signal and/or broadcast associated information or a server that receives a previously generated broadcast signal and/or broadcast associated information and transmits it to the terminal. The broadcast signal may include a TV broadcast signal, a radio broadcast signal, a data broadcast signal, and the like. Moreover, the broadcast signal may further include a broadcast signal combined with a TV or radio broadcast signal. The broadcast associated information may also be provided via a mobile communication network, and in this case, the broadcast associated information may be received by the mobile communication module 112. The broadcast signal may exist in various forms, for example, it may exist in the form of Digital Multimedia Broadcasting (DMB) Electronic Program Guide (EPG), Digital Video Broadcasting Handheld (DVB-H) Electronic Service Guide (ESG), and the like. . The broadcast receiving module 111 can receive a signal broadcast by using various types of broadcast systems. In particular, the broadcast receiving module 111 can use forward link media (MediaFLO) by using, for example, multimedia broadcast-terrestrial (DMB-T), digital multimedia broadcast-satellite (DMB-S), digital video broadcast-handheld (DVB-H) The digital broadcasting system of the ^@ ) data broadcasting system, the terrestrial digital broadcasting integrated service (ISDB-T), and the like receives digital broadcasting. The broadcast receiving module 111 can be constructed as various broadcast systems suitable for providing broadcast signals as well as the above-described digital broadcast system. The broadcast signal and/or broadcast associated information received via the broadcast receiving module 111 may be stored in the memory 160 (or other type of storage medium).

The mobile communication module 112 transmits the radio signals to and/or receives radio signals from at least one of a base station (e.g., an access point, a Node B, etc.), an external terminal, and a server. Such radio signals may include voice call signals, video call signals, or various types of data transmitted and/or received in accordance with text and/or multimedia messages.

The wireless internet module 113 supports wireless internet access of the mobile terminal. The module can be internally or externally coupled to the terminal. The wireless Internet access technologies involved in the module may include WLAN (Wireless LAN) (Wi-Fi), Wibro (Wireless Broadband), Wimax (Worldwide Interoperability for Microwave Access), HSDPA (High Speed Downlink Packet Access), etc. .

The short range communication module 114 is a module for supporting short range communication. Some examples of short-range communication technology include Bluetooth ^TM, a radio frequency identification (RFID), infrared data association (IrDA), ultra wideband (UWB), ZigBee, etc. ^TM.

The location information module 115 is a module for checking or acquiring location information of the mobile terminal. A typical example of a location information module is GPS (Global Positioning System). According to the current technology, the GPS module 115 calculates distance information and accurate time information from three or more satellites and applies triangulation to the calculated information to accurately calculate three-dimensional current position information based on longitude, latitude, and altitude. Currently, the method for calculating position and time information uses three satellites and corrects the calculated position and time information errors by using another satellite. Further, the GPS module 115 is capable of calculating speed information by continuously calculating current position information in real time.

The A/V input unit 120 is for receiving an audio or video signal. The A/V input unit 120 may include a camera 121 and a microphone 1220 that processes image data of still pictures or video obtained by the image capturing device in a video capturing mode or an image capturing mode. The processed image frame can be displayed on the display unit 151. The image frames processed by the camera 121 may be stored in the memory 160 (or other storage medium) or transmitted via the wireless communication unit 110, and two or more cameras 1210 may be provided according to the configuration of the mobile terminal. The microphone 122 can receive sound (audio data) via a microphone in an operation mode of a telephone call mode, a recording mode, a voice recognition mode, and the like, and can process such sound as audio data. The processed audio (voice) data can be converted to a format output that can be transmitted to the mobile communication base station via the mobile communication module 112 in the case of a telephone call mode. The microphone 122 can implement various types of noise cancellation (or suppression) algorithms to cancel (or suppress) noise or interference generated during the process of receiving and transmitting audio signals.

The user input unit 130 may generate key input data according to a command input by the user to control various operations of the mobile terminal. The user input unit 130 allows the user to input various types of information, and may include a keyboard, a pot, a touch pad (eg, a touch sensitive component that detects changes in resistance, pressure, capacitance, etc. due to contact), a scroll wheel , rocker, etc. In particular, when the touch panel is superimposed on the display unit 151 in the form of a layer, a touch screen can be formed.

The sensing unit 140 detects the current state of the mobile terminal 100 (eg, the open or closed state of the mobile terminal 100), the location of the mobile terminal 100, the presence or absence of contact (ie, touch input) by the user with the mobile terminal 100, and the mobile terminal. Orientation of 100, acceleration or deceleration movement and direction of the mobile terminal 100, and the like, And a command or signal for controlling the operation of the mobile terminal 100 is generated. For example, when the mobile terminal 100 is implemented as a slide type mobile phone, the sensing unit 140 can sense whether the slide type phone is turned on or off. In addition, the sensing unit 140 can detect whether the power supply unit 190 provides power or whether the interface unit 170 is coupled to an external device. Sensing unit 140 may include proximity sensor 1410 which will be described below in connection with a touch screen.

The interface unit 170 serves as an interface through which at least one external device can connect with the mobile terminal 100. For example, the external device may include a wired or wireless headset port, an external power (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, and an audio input/output. (I/O) port, video I/O port, headphone port, and more. The identification module may be stored to verify various information used by the user using the mobile terminal 100 and may include a User Identification Module (UIM), a Customer Identification Module (SIM), a Universal Customer Identity Module (USIM), and the like. In addition, the device having the identification module (hereinafter referred to as "identification device") may take the form of a smart card, and thus the identification device may be connected to the mobile terminal 100 via a port or other connection device. The interface unit 170 can be configured to receive input from an external device (eg, data information, power, etc.) and transmit the received input to one or more components within the mobile terminal 100 or can be used at the mobile terminal and external device Transfer data between.

In addition, when the mobile terminal 100 is connected to the external base, the interface unit 170 may function as a path through which power is supplied from the base to the mobile terminal 100 or may be used as a transmission of various command signals allowing input from the base to the mobile terminal 100 The path to the terminal. Various command signals or power input from the base can be used as signals for identifying whether the mobile terminal is accurately mounted on the base. Output unit 150 is configured to provide an output signal (eg, an audio signal, a video signal, an alarm signal, a vibration signal, etc.) in a visual, audio, and/or tactile manner. The output unit 150 may include a display unit 151, an audio output module 152, an alarm unit 153, and the like.

The display unit 151 can display information processed in the mobile terminal 100. For example, when the mobile terminal 100 is in a phone call mode, the display unit 151 can display a user interface (UI) or a graphical user interface (GUI) related to a call or other communication (eg, text messaging, multimedia file download, etc.). When the mobile terminal 100 is in a video call mode or an image capturing mode, the display unit 151 may display a captured image and/or a received image, a UI or GUI showing a video or image and related functions, and the like.

Meanwhile, when the display unit 151 and the touch panel are superposed on each other in the form of a layer to form a touch screen, the display unit 151 can function as an input device and an output device. The display unit 151 may include at least one of a liquid crystal display (LCD), a thin film transistor LCD (TFT-LCD), an organic light emitting diode (OLED) display, a flexible display, a three-dimensional (3D) display, and the like. Some of these displays may be configured to be transparent to allow a user to view from the outside, which may be referred to as a transparent display, and a typical transparent display may be, for example, a TOLED (Transparent Organic Light Emitting Diode) display or the like. According to a particular desired embodiment, the mobile terminal 100 may include two or more display units (or other display devices), for example, the mobile terminal may include an external display unit (not shown) and an internal display unit (not shown) . The touch screen can be used to detect touch input pressure as well as touch input position and touch input area.

The audio output module 152 may convert audio data received by the wireless communication unit 110 or stored in the memory 160 when the mobile terminal is in a call signal receiving mode, a call mode, a recording mode, a voice recognition mode, a broadcast receiving mode, and the like. The audio signal is output as sound. Moreover, the audio output module 152 can provide audio output (eg, call signal reception sound, message reception sound, etc.) associated with a particular function performed by the mobile terminal 100. The audio output module 152 can include a speaker, a buzzer, and the like.

The alarm unit 153 can provide an output to notify the mobile terminal 100 of the occurrence of an event. Typical events may include call reception, message reception, key signal input, touch input, and the like. In addition to audio or video output, the alert unit 153 can provide an output in a different manner to notify of the occurrence of an event. For example, the alarm unit 153 can provide an output in the form of vibrations, and when a call, message, or some other incoming communication is received, the alarm unit 153 can provide a tactile output (ie, vibration) to notify the user of it. By providing such a tactile output, the user is able to recognize the occurrence of various events even when the user's mobile phone is in the user's pocket. The alarm unit 153 can also provide an output of the notification event occurrence via the display unit 151 or the audio output module 152.

The memory 160 may store a software program or the like for processing and control operations performed by the controller 180, or may temporarily store data (for example, a phone book, a message, a still image, a video, etc.) that has been output or is to be output. Moreover, the memory 160 can store data regarding vibrations and audio signals of various manners that are output when a touch is applied to the touch screen.

The memory 160 may include at least one type of storage medium including a flash memory, a hard disk, a multimedia card, a card type memory (eg, SD or DX memory, etc.), a random access memory. (RAM), static random access memory (SRAM), read only memory (ROM), electrically erasable programmable read only memory (EEPROM), programmable read only memory (PROM), magnetic memory, magnetic disk, optical disk, and the like. Moreover, the mobile terminal 100 can cooperate with a network storage device that performs a storage function of the memory 160 through a network connection.

The controller 180 typically controls the overall operation of the mobile terminal. For example, the controller 180 performs the control and processing associated with voice calls, data communications, video calls, and the like. Additionally, the controller 180 can include a multimedia module 1810 for reproducing (or playing back) multimedia data, which can be constructed within the controller 180 or can be configured to be separate from the controller 180. The controller 180 may perform a pattern recognition process to recognize a handwriting input or a picture drawing input performed on the touch screen as a character or an image.

The power supply unit 190 receives external power or internal power under the control of the controller 180 and provides appropriate power required to operate the various components and components.

The various embodiments described herein can be implemented in a computer readable medium using, for example, computer software, hardware, or any combination thereof. For hardware implementations, the embodiments described herein may be through the use of application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays ( An FPGA, a processor, a controller, a microcontroller, a microprocessor, at least one of the electronic units designed to perform the functions described herein, in some cases, such an embodiment may be at the controller 180 Implemented in the middle. For software implementations, implementations such as procedures or functions may be implemented with separate software modules that permit the execution of at least one function or operation. The software code can be implemented by a software application (or program) written in any suitable programming language, which can be stored in memory 160 and executed by controller 180.

So far, the mobile terminal has been described in terms of its function. Hereinafter, for the sake of brevity, a slide type mobile terminal among various types of mobile terminals such as a folding type, a bar type, a swing type, a slide type mobile terminal, and the like will be described as an example. Therefore, the present invention can be applied to any type of mobile terminal, and is not limited to a slide type mobile terminal.

The mobile terminal 100 as shown in FIG. 1 may be configured to operate using a communication system such as a wired and wireless communication system and a satellite-based communication system that transmits data via frames or packets.

A communication system in which a mobile terminal according to the present invention can be operated will now be described with reference to FIG.

Such communication systems may use different air interfaces and/or physical layers. For example, air interfaces used by communication systems include, for example, Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Code Division Multiple Access (CDMA), and Universal Mobile Telecommunications System (UMTS) (in particular, Long Term Evolution (LTE)). ), Global System for Mobile Communications (GSM), etc. As a non-limiting example, the following description relates to a CDMA communication system, but such teachings are equally applicable to other types of systems.

Referring to FIG. 2, a CDMA wireless communication system can include a plurality of mobile terminals 100, a plurality of base stations (BS) 270, a base station controller (BSC) 275, and a mobile switching center (MSC) 280. The MSC 280 is configured to interface with a public switched telephone network (PSTN) 290. The MSC 280 is also configured to interface with a BSC 275 that can be coupled to the base station 270 via a backhaul line. The backhaul line can be constructed in accordance with any of a number of well known interfaces including, for example, E1/T1, ATM, IP, PPP, Frame Relay, HDSL, ADSL, or xDSL. It will be appreciated that the system as shown in FIG. 2 may include multiple BSC 2750s.

Each BS 270 can serve one or more partitions (or regions), each of which is covered by a multi-directional antenna or an antenna directed to a particular direction radially away from the BS 270. Alternatively, each partition may be covered by two or more antennas for diversity reception. Each BS 270 can be configured to support multiple frequency allocations, and each frequency allocation has a particular frequency spectrum (eg, 1.25 MHz, 5 MHz, etc.).

The intersection of partitioning and frequency allocation can be referred to as a CDMA channel. BS 270 may also be referred to as a Base Transceiver Subsystem (BTS) or other equivalent terminology. In such a case, the term "base station" can be used to generally refer to a single BSC 275 and at least one BS 270. A base station can also be referred to as a "cell station." Alternatively, each partition of a particular BS 270 may be referred to as a plurality of cellular stations.

As shown in FIG. 2, a broadcast transmitter (BT) 295 transmits a broadcast signal to the mobile terminal 100 operating within the system. A broadcast receiving module 111 as shown in FIG. 1 is provided at the mobile terminal 100 to receive a broadcast signal transmitted by the BT 295. In Figure 2, several Global Positioning System (GPS) satellites 300 are shown. The satellite 300 helps locate at least one of the plurality of mobile terminals 100.

In Figure 2, a plurality of satellites 300 are depicted, but it is understood that useful positioning information can be obtained using any number of satellites. The GPS module 115 as shown in Figure 1 is typically configured to cooperate with the satellite 300 to obtain desired positioning information. Instead of GPS tracking technology or in addition to GPS tracking technology, other techniques that can track the location of the mobile terminal can be used. Additionally, at least one GPS satellite 300 can selectively or additionally process satellite DMB transmissions.

As a typical operation of a wireless communication system, BS 270 receives reverse link signals from various mobile terminals 100. Mobile terminal 100 typically participates in calls, messaging, and other types of communications. Each reverse link signal received by a particular base station 270 is processed within a particular BS 270. The obtained data is forwarded to the relevant BSC 275. The BSC provides call resource allocation and coordinated mobility management functions including a soft handoff procedure between the BSs 270. The BSC 275 also routes the received data to the MSC 280, which provides additional routing services for interfacing with the PSTN 290. Similarly, PSTN 290 interfaces with MSC 280, which forms an interface with BSC 275, and BSC 275 controls BS 270 accordingly to transmit forward link signals to mobile terminal 100.

Based on the above-described mobile terminal hardware structure and communication system, various embodiments of the method of the present invention are proposed.

As shown in FIG. 3, a first embodiment of the present invention provides a method for correcting focus, including:

Step 300: Acquire, according to a focus correction command from the user, a position of the movable lens when the distance between the camera and the camera is the focal length in the focus correction command.

In this step, the user can send the focus correction command through the touch screen or the like, and the specific technology is not limited to the scope of protection of the embodiments of the present invention.

This step specifically includes:

Taking the focal length in the focus correction command as the initial default position, respectively, the movable lens is placed at different positions to obtain preview frame data of the object at different positions; and the obtained preview frame with the sharpest edge of the object in each preview frame data is obtained. The position of the movable lens corresponding to the data.

The method further includes: updating a default value of the focal length by using corresponding distance data of the movable lens corresponding to the sharpest preview frame data of the edge of the object, and subsequently pushing the lens according to the default distance.

For example, how to obtain the preview frame data of the object at different locations is well-known in the art, and is not intended to limit the scope of the present invention, and details are not described herein.

For example, how to obtain the sharpness of the edge of the object of each preview frame data is well known to those skilled in the art, and is not intended to limit the scope of protection of the present invention, and details are not described herein again.

Among them, the stepper motor can be controlled by software to place the movable lens in different positions.

In this step, focus is when the subject is clearly imaged when taking a picture. As shown in Figure 4, when the camera is in focus, the image sensor is located on the clear image surface; when the camera is out of focus, the image The sensor deviates from the clear image plane.

In this step, the movable lens belongs to a part of the camera, and the other part of the camera belongs to a non-movable lens. In other words, only a part of the camera can move, depending on the design of the camera.

Step 301: Save the correspondence between the focal length in the focus correction command and the obtained position of the movable lens.

In this step, the correspondence can be saved to a non-erasable partition.

Among them, the non-erasable partition means that once the data is written, subsequent mobile terminal users are not affected by resetting or flashing the version anyway. For Android (Android) systems, non-rewritable partitions are generally persistent partitions.

The solution provided by the embodiment of the invention corrects the focus of the camera by acquiring and storing the position of the movable lens when the focus is achieved, thereby solving the phenomenon that the focus is not accurate during the manual focusing process, and the user is manually The accuracy of focus during focusing. That is to say, the user can obtain the focus of the movable lens when the focus is achieved by different focal lengths, thereby solving the phenomenon that the focus is not accurate during the manual focusing process.

Further, when receiving a manual focus command from a user, the method further includes:

Finding the position of the movable lens corresponding to the focal length in the manual focus command in the correspondence relationship; acquiring the current position of the movable lens; and focusing according to the obtained current position of the movable lens and the position of the found movable lens.

Wherein, when the position of the movable lens corresponding to the focal length in the manual focus command is not found, the position of the movable lens corresponding to the two focal lengths having the smallest absolute value of the difference in the focal length in the manual focus command can be found, The obtained positions of the two movable lenses are linearly interpolated to obtain the position of the movable lens corresponding to the focal length in the manual focus command, and the focus is obtained according to the obtained current position of the movable lens and the position of the movable lens obtained by the interpolation.

The specific location of the movable lens is specifically known to those skilled in the art, and is not intended to limit the scope of protection of the embodiments of the present invention, and details are not described herein.

Referring to FIG. 5, an embodiment of the present invention further provides an apparatus for correcting focus, including at least:

The acquisition module is set to acquire the camera pair and the camera according to the focus correction instruction from the user The distance between the heads is the position of the movable lens when the object of the focal length in the focus correction command is in focus;

The receiving module may be disposed in the user input unit 130 in FIG. 1, and the obtaining module may be disposed in the controller 180 in FIG. 1, and the storage module may be disposed in the memory 160 in FIG.

In the device of the present invention, the obtaining module is specifically configured to:

The movable lens is respectively placed at different positions to obtain preview frame data of objects at different positions;

Obtaining the position of the movable lens corresponding to the preview image data with the sharpest degree of the edge of the object in each obtained preview frame data.

In the device of the embodiment of the present invention, the storage module is specifically configured to: save the correspondence to the non-erasable partition.

The device of the embodiment of the present invention further includes:

a receiving module configured to receive a manual focus command from a user;

a search module configured to find a position of the movable lens corresponding to a focal length in the manual focus command in the correspondence relationship;

The acquisition module is further configured to: obtain a current position of the movable lens;

Also includes:

The lookup module and the focus module may be disposed in the controller 180 in FIG.

It is to be understood that the term "comprises", "comprising", or any other variants thereof, is intended to encompass a non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes those elements. It also includes other elements that are not explicitly listed, or elements that are inherent to such a process, method, article, or device. An element that is defined by the phrase "comprising a ..." does not exclude the presence of additional equivalent elements in the process, method, item, or device that comprises the element.

The serial numbers of the embodiments of the present invention are merely for the description, and do not represent the advantages and disadvantages of the embodiments.

Through the description of the above embodiments, those skilled in the art can clearly understand that the foregoing embodiment method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is better. Implementation. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk, The optical disc includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the methods described in various embodiments of the present invention.

The above are only the preferred embodiments of the present invention, and are not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformations made by the description of the present invention and the drawings are directly or indirectly applied to other related technical fields. The same is included in the scope of patent protection of the present invention.

Industrial applicability

The method and apparatus for correcting focus according to the embodiment of the present invention include: acquiring, according to a focus correction instruction from a user, a position of the movable lens when the distance between the camera and the camera is the focal length in the focus correction command; The correspondence between the focal length in the focus correction command and the position of the obtained movable lens is saved. The solution of the embodiment of the present invention solves the problem that the user is in the manual focusing process by acquiring the position of the movable lens when the distance between the camera and the camera is the focal length in the focus correction command, and saving the position of the lens. The phenomenon of inaccurate focus appears to improve the accuracy of the user's focus during manual focusing.

Claims

A method of correcting focus, comprising:

Obtaining a position of the movable lens when the object with the focal length in the focus correction command is in focus according to the focus correction command from the user;

The correspondence between the focal length in the focus correction command and the position of the obtained movable lens is saved.
The method according to claim 1, wherein the position of the movable lens when the acquisition camera focuses on an object having a focal length in the focus correction command from the camera comprises:

Taking the focal length in the focus correction instruction as an initial default position, respectively placing the movable lens at different positions, and acquiring preview frame data of the object at different positions;

Acquiring the position of the movable lens corresponding to the preview image data with the sharpest degree of sharpness of the edge of the object in each obtained preview frame data.
The method according to claim 2, further comprising: updating a default value of the focal length by using corresponding distance data of the movable lens corresponding to the sharpest preview frame data of the edge of the object.
The method of claim 1 further comprising saving the correspondence to a non-erasable partition.
The method of claim 2 wherein the stepper motor is controlled to place the movable lens in a different position.
The method according to any one of claims 1 to 5, when receiving a manual focus command from the user, further comprising:

Searching, in the correspondence relationship, a position of the movable lens corresponding to the focal length in the manual focus command;

Obtaining a current position of the movable lens;

Focusing is performed based on the current position of the movable lens obtained and the position of the movable lens that is found.
A method of achieving focus, comprising:

Acquiring the position of the movable lens when the object is in focus with the focal length in the focus correction command according to the focus correction command from the user; saving the focal length in the focus correction command and the obtained position of the movable lens Correspondence between them;

When receiving a manual focus command from the user, the method further includes:

Searching, in the correspondence relationship, a position of the movable lens corresponding to the focal length in the manual focus command;

Obtaining a current position of the movable lens;

Focusing is performed based on the current position of the movable lens obtained and the position of the movable lens that is found.
The method according to claim 7, wherein the position of the movable lens when the acquisition camera focuses on the object having the focal length in the focus correction command from the camera includes:

Taking the focal length in the focus correction instruction as an initial default position, respectively placing the movable lens at different positions, and acquiring preview frame data of the object at different positions;

Acquiring the position of the movable lens corresponding to the preview image data with the sharpest degree of sharpness of the edge of the object in each obtained preview frame data.
The method of claim 7 further comprising saving the correspondence to a non-erasable partition.
The method of claim 8 wherein the stepper motor is controlled to place the movable lens in different positions.
A device for correcting focus, comprising:

Obtaining a module, configured to acquire, according to a focus correction instruction from the user, a position of the movable lens when the distance between the camera and the camera is the focal length in the focus correction command;

The storage module is configured to save a correspondence between a focal length in the focus correction command and a position of the obtained movable lens.
The device according to claim 11, wherein the obtaining module is specifically configured to:

Taking the focal length in the focus correction instruction as an initial default position, respectively placing the movable lens at different positions, and acquiring preview frame data of the object at different positions;

Obtaining a position of the movable lens corresponding to the preview frame data having the largest sharpness of the edge of the object in each obtained preview frame data.
The apparatus of claim 11, wherein the storage module is specifically configured to save the correspondence to a non-erasable partition.
The apparatus of claim 12 wherein the stepper motor is controlled to position the movable lens in a different position.
The device according to any one of claims 11 to 14, further comprising: a receiving module, a focusing module; wherein

a receiving module configured to receive a manual focus command from the user;

a search module, configured to search for a position of the movable lens corresponding to a focal length in the manual focus command in a correspondence relationship of the storage module;

The focus module is set to focus according to the current position of the obtained movable lens and the position of the found movable lens.
A device for achieving focusing, comprising:

Obtaining a module, configured to acquire, according to a focus correction instruction from the user, a position of the movable lens when the distance between the camera and the camera is the focal length in the focus correction command;

a storage module configured to save a correspondence between a focal length in the focus correction command and a position of the obtained movable lens;

a receiving module, configured to notify the module when receiving a manual focus command from the user;

a search module, configured to search for a position of the movable lens corresponding to a focal length in the manual focus command in a correspondence relationship of the storage module;

The focus module is set to focus according to the current position of the obtained movable lens and the position of the found movable lens.
The device for realizing focusing according to claim 16, wherein the acquiring module is specifically configured to:

Taking the focal length in the focus correction instruction as an initial default position, respectively placing the movable lens at different positions, and acquiring preview frame data of the object at different positions;

Obtaining a position of the movable lens corresponding to the preview frame data having the largest sharpness of the edge of the object in each obtained preview frame data.
The apparatus of claim 16, wherein the storage module is specifically configured to save the correspondence to a non-erasable partition.
The apparatus of claim 17 wherein the stepper motor is controlled to position the movable lens in a different position.
A computer readable storage medium storing computer executable instructions for performing the method of correcting focus as claimed in any of claims 1-6, and/or for performing claim 7 A method of achieving focusing as described in any of the items 10.