CN112135047A

CN112135047A - Image processing method, mobile terminal and computer storage medium

Info

Publication number: CN112135047A
Application number: CN202011008627.3A
Authority: CN
Inventors: 熊竹; 王汇; 崔小辉; 李风光
Original assignee: Nubia Technology Co Ltd
Current assignee: Nubia Technology Co Ltd
Priority date: 2020-09-23
Filing date: 2020-09-23
Publication date: 2020-12-25

Abstract

The embodiment of the invention provides an image processing method, which comprises the following steps: acquiring a first image acquired currently; determining that the currently acquired first image meets a symmetry condition; and controlling to display a symmetrical composition indicating line on the photographing interface by using the first display parameter. By the method, whether the object capable of carrying out composition photographing in a symmetrical composition mode exists in the current photographing picture can be automatically detected, if yes, the symmetrical composition indicating line is controlled to be displayed, and if not, the symmetrical composition indicating line is not displayed, so that the user can be assisted in composition.

Description

Image processing method, mobile terminal and computer storage medium

Technical Field

The present invention relates to the field of electronic technologies, and in particular, to an image processing method, a mobile terminal, and a computer storage medium.

Background

With the continuous improvement of photographing hardware of mobile terminal equipment, people are more and more accustomed to photographing, video shooting and the like through mobile terminals. However, for photographing and photography, if a photograph with a great artistic sense is to be taken, a smart composition is essential. In the composition, there are many different composition modes, wherein one of the more classical composition modes is symmetric composition, that is, when the photographed object is a symmetric structure, then by displaying the symmetric object in a symmetric manner with the picture, a very good picture can be obtained.

However, the existing camera application can only set the nine-grid graph line in advance to assist the user in composition reference. In this way, it is not possible to precisely perform the symmetrical composition, and when the user does not shoot the object with the symmetrical structure, the nine-grid pattern line is always displayed in the collected picture, and a certain visual interference is also caused to the user.

Disclosure of Invention

In a first aspect of an embodiment of the present invention, an image processing method includes: acquiring a first image acquired currently; determining that the currently acquired first image meets a symmetry condition; and controlling to display a symmetrical composition indicating line on the photographing interface by using the first display parameter.

Optionally, the step of determining that the currently acquired first image satisfies a symmetry condition is determining that a symmetric object satisfying the symmetry condition exists in the currently acquired first image.

Optionally, after the step of controlling to display the symmetrical composition indicating line on the photographing interface with the first display parameter, the method further includes: controlling and adjusting image acquisition parameters, and controlling to update a currently acquired first image to a corresponding second image; determining that an axis of symmetry of the second image coincides with the symmetrical composition indicator line; controlling to display the symmetric composition indicating line with a second display parameter.

Optionally, the step of determining that the axis of symmetry of the second image coincides with the symmetric composition indication line comprises: acquiring a symmetry axis of the symmetric object; and when the position information of the symmetry axis is the same as the position information of the symmetrical composition indicating line, determining that the symmetry axis of the second image coincides with the symmetrical composition indicating line.

Optionally, the step of obtaining the symmetry axis of the symmetric object includes: segmenting the first image to form a first sub-image and a second sub-image; extracting a first characteristic point set of the first sub-image and a second characteristic point set of the second sub-image; acquiring first coordinate information of each first feature point in the first feature point set and second coordinate information of each second feature point in the second feature point set; and determining the symmetry axis of the symmetric object according to the first coordinate information and the second coordinate information.

Optionally, the step of segmenting the first image to form a first sub-image and a second sub-image comprises: acquiring symmetry types of the first image, wherein the symmetry types comprise horizontal symmetry and vertical symmetry; a segmentation type of the first image according to the symmetry type, the segmentation type including horizontal segmentation and vertical segmentation; and segmenting the first image according to the segmentation type to form a first sub-image and a second sub-image.

Optionally, the step of segmenting the first image to form a first sub-image and a second sub-image comprises: directly segmenting the first image to obtain an initial first sub-image and an initial second sub-image; determining the initial second sub-image as a second sub-image; and carrying out mirror image turning on the initial first sub-image to obtain the first sub-image.

Optionally, the step of obtaining first coordinate information of each first feature point in the first feature point set and second coordinate information of each second feature point in the second feature point set includes: pairing the first characteristic points and the second characteristic points to obtain a plurality of groups of paired points; and acquiring first coordinate information of the first characteristic point and second coordinate information of the second characteristic point in each group of matching points.

A second aspect of an embodiment of the present invention provides a mobile terminal, where the mobile terminal includes a processor and a memory;

the memory is used for storing an executable program;

the processor is used for executing the executable program to realize the image processing method.

A third aspect of embodiments of the present invention provides a computer storage medium having an executable program stored thereon, the executable program being executed to implement the image processing method described above.

The embodiment of the invention has the following beneficial effects:

according to the image processing method, the mobile terminal and the computer storage medium in the embodiment of the invention, the current first image is acquired in the photographing process, whether the first image meets the symmetry condition is judged by analyzing the content in the first image, and if the first image meets the symmetry condition, the object in the first image can be composed in a symmetrical composition mode, so that when the first image meets the symmetry condition, a symmetrical composition indicating line is controlled to be displayed in a photographing interface, a user can adjust the acquired object in the first image through the angle of the mobile acquisition equipment, so that the symmetry axis of the first image can coincide with the symmetrical composition indicating line, and the purpose of symmetrical composition is achieved. By the method, whether the object capable of carrying out composition photographing in a symmetrical composition mode exists in the current photographing picture can be automatically detected, if yes, the symmetrical composition indicating line is controlled to be displayed, and if not, the symmetrical composition indicating line is not displayed, so that the user can be assisted in composition.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic diagram of a hardware structure of a mobile terminal according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a wireless communication system of a mobile terminal according to an embodiment of the present invention;

FIG. 3 is a flowchart of a method according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a currently acquired first image provided by an embodiment of the present invention;

FIG. 5 is a flow chart of a method according to another embodiment of the present invention;

FIGS. 6A-6B are schematic diagrams of a first image update to a second image according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a second image being cut according to an embodiment of the present invention;

fig. 8 is a schematic diagram of mirroring an initial first sub-image according to an embodiment of the present invention;

fig. 9 is a schematic diagram of feature point extraction performed on the first sub-image and the second sub-image according to the embodiment of the present invention;

fig. 10 is a schematic diagram of feature point pairing according to an embodiment of the present invention;

FIG. 11 is a schematic illustration of a calculated axis of symmetry provided by an embodiment of the present invention;

fig. 12 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for facilitating the explanation of the present invention, and have no specific meaning in itself. Thus, "module", "component" or "unit" may be used mixedly.

The terminal may be implemented in various forms. For example, the terminal described in the present invention may include a mobile terminal such as a mobile phone, a tablet computer, a notebook computer, a palmtop computer, a Personal Digital Assistant (PDA), a Portable Media Player (PMP), a navigation device, a wearable device, a smart band, a pedometer, and the like, and a fixed terminal such as a Digital TV, a desktop computer, and the like. The following description will be given by way of example of a mobile terminal, and it will be understood by those skilled in the art that the construction according to the embodiment of the present invention can be applied to a fixed type terminal, in addition to elements particularly used for mobile purposes.

Referring to fig. 1, which is a schematic diagram of a hardware structure of a mobile terminal for implementing various embodiments of the present invention, the mobile terminal 100 may include: RF (Radio Frequency) unit 101, WiFi module 102, audio output unit 103, a/V (audio/video) input unit 104, sensor 105, display unit 106, user input unit 107, interface unit 108, memory 109, processor 110, and power supply 111. Those skilled in the art will appreciate that the mobile terminal architecture shown in fig. 1 is not intended to be limiting of mobile terminals, which may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.

The following describes each component of the mobile terminal in detail with reference to fig. 1:

the radio frequency unit 101 may be configured to receive and transmit signals during information transmission and reception or during a call, and specifically, receive downlink information of a base station and then process the downlink information to the processor 110; in addition, the uplink data is transmitted to the base station. Typically, radio frequency unit 101 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 101 can also communicate with a network and other devices through wireless communication. The wireless communication may use any communication standard or protocol, including but not limited to GSM (Global System for Mobile communications), GPRS (General Packet Radio Service), CDMA2000(Code Division Multiple Access 2000), WCDMA (Wideband Code Division Multiple Access), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access), FDD-LTE (Frequency Division duplex Long Term Evolution), and TDD-LTE (Time Division duplex Long Term Evolution).

WiFi belongs to short-distance wireless transmission technology, and the mobile terminal can help a user to receive and send e-mails, browse webpages, access streaming media and the like through the WiFi module 102, and provides wireless broadband internet access for the user. Although fig. 1 shows the WiFi module 102, it is understood that it does not belong to the essential constitution of the mobile terminal, and may be omitted entirely as needed within the scope not changing the essence of the invention.

The audio output unit 103 may convert audio data received by the radio frequency unit 101 or the WiFi module 102 or stored in the memory 109 into an audio signal and output as sound when the mobile terminal 100 is in a call signal reception mode, a call mode, a recording mode, a voice recognition mode, a broadcast reception mode, or the like. Also, the audio output unit 103 may also provide audio output related to a specific function performed by the mobile terminal 100 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 103 may include a speaker, a buzzer, and the like.

The a/V input unit 104 is used to receive audio or video signals. The a/V input Unit 104 may include a Graphics Processing Unit (GPU) 1041 and a microphone 1042, the Graphics processor 1041 Processing image data of still pictures or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 106. The image frames processed by the graphic processor 1041 may be stored in the memory 109 (or other storage medium) or transmitted via the radio frequency unit 101 or the WiFi module 102. The microphone 1042 may receive sounds (audio data) via the microphone 1042 in a phone call mode, a recording mode, a voice recognition mode, or the like, and may be capable of processing such sounds into audio data. The processed audio (voice) data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 101 in case of a phone call mode. The microphone 1042 may implement various types of noise cancellation (or suppression) algorithms to cancel (or suppress) noise or interference generated in the course of receiving and transmitting audio signals.

The mobile terminal 100 also includes at least one sensor 105, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the brightness of the display panel 1061 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 1061 and/or a backlight when the mobile terminal 100 is moved to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally, three axes), can detect the magnitude and direction of gravity when stationary, and can be used for applications of recognizing the posture of a mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer and tapping), and the like; as for other sensors such as a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which can be configured on the mobile phone, further description is omitted here.

The display unit 106 is used to display information input by a user or information provided to the user. The Display unit 106 may include a Display panel 1061, and the Display panel 1061 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.

The user input unit 107 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the mobile terminal. Specifically, the user input unit 107 may include a touch panel 1071 and other input devices 1072. The touch panel 1071, also referred to as a touch screen, may collect a touch operation performed by a user on or near the touch panel 1071 (e.g., an operation performed by the user on or near the touch panel 1071 using a finger, a stylus, or any other suitable object or accessory), and drive a corresponding connection device according to a predetermined program. The touch panel 1071 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 110, and can receive and execute commands sent by the processor 110. In addition, the touch panel 1071 may be implemented in various types, such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. In addition to the touch panel 1071, the user input unit 107 may include other input devices 1072. In particular, other input devices 1072 may include, but are not limited to, one or more of a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like, and are not limited to these specific examples.

Further, the touch panel 1071 may cover the display panel 1061, and when the touch panel 1071 detects a touch operation thereon or nearby, the touch panel 1071 transmits the touch operation to the processor 110 to determine the type of the touch event, and then the processor 110 provides a corresponding visual output on the display panel 1061 according to the type of the touch event. Although the touch panel 1071 and the display panel 1061 are shown in fig. 1 as two separate components to implement the input and output functions of the mobile terminal, in some embodiments, the touch panel 1071 and the display panel 1061 may be integrated to implement the input and output functions of the mobile terminal, and is not limited herein.

The interface unit 108 serves as an interface through which at least one external device is connected to the mobile terminal 100. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 108 may be used to receive input (e.g., data information, power, etc.) from external devices and transmit the received input to one or more elements within the mobile terminal 100 or may be used to transmit data between the mobile terminal 100 and external devices.

The memory 109 may be used to store software programs as well as various data. The memory 109 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 109 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The processor 110 is a control center of the mobile terminal, connects various parts of the entire mobile terminal using various interfaces and lines, and performs various functions of the mobile terminal and processes data by operating or executing software programs and/or modules stored in the memory 109 and calling data stored in the memory 109, thereby performing overall monitoring of the mobile terminal. Processor 110 may include one or more processing units; preferably, the processor 110 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 110.

The mobile terminal 100 may further include a power supply 111 (e.g., a battery) for supplying power to various components, and preferably, the power supply 111 may be logically connected to the processor 110 via a power management system, so as to manage charging, discharging, and power consumption management functions via the power management system.

Although not shown in fig. 1, the mobile terminal 100 may further include a bluetooth module or the like, which is not described in detail herein.

In order to facilitate understanding of the embodiments of the present invention, a communication network system on which the mobile terminal of the present invention is based is described below.

Referring to fig. 2, fig. 2 is an architecture diagram of a communication Network system according to an embodiment of the present invention, where the communication Network system is an LTE system of a universal mobile telecommunications technology, and the LTE system includes a UE (User Equipment) 201, an E-UTRAN (Evolved UMTS Terrestrial Radio Access Network) 202, an EPC (Evolved Packet Core) 203, and an IP service 204 of an operator, which are in communication connection in sequence.

Specifically, the UE201 may be the terminal 100 described above, and is not described herein again.

The E-UTRAN202 includes eNodeB2021 and other eNodeBs 2022, among others. Among them, the eNodeB2021 may be connected with other eNodeB2022 through backhaul (e.g., X2 interface), the eNodeB2021 is connected to the EPC203, and the eNodeB2021 may provide the UE201 access to the EPC 203.

The EPC203 may include an MME (Mobility Management Entity) 2031, an HSS (Home Subscriber Server) 2032, other MMEs 2033, an SGW (Serving gateway) 2034, a PGW (PDN gateway) 2035, and a PCRF (Policy and Charging Rules Function) 2036, and the like. The MME2031 is a control node that handles signaling between the UE201 and the EPC203, and provides bearer and connection management. HSS2032 is used to provide registers to manage functions such as home location register (not shown) and holds subscriber specific information about service characteristics, data rates, etc. All user data may be sent through SGW2034, PGW2035 may provide IP address assignment for UE201 and other functions, and PCRF2036 is a policy and charging control policy decision point for traffic data flow and IP bearer resources, which selects and provides available policy and charging control decisions for a policy and charging enforcement function (not shown).

The IP services 204 may include the internet, intranets, IMS (IP Multimedia Subsystem), or other IP services, among others.

Although the LTE system is described as an example, it should be understood by those skilled in the art that the present invention is not limited to the LTE system, but may also be applied to other wireless communication systems, such as GSM, CDMA2000, WCDMA, TD-SCDMA, and future new network systems.

Based on the above mobile terminal hardware structure and communication network system, the present invention provides various embodiments of the method.

Fig. 3 is a flowchart of an image processing method according to an embodiment of the present invention. In this embodiment, the image processing method may be applied to the mobile terminal shown in fig. 1 or fig. 2, and it is understood that the image processing method may also be applied to electronic devices such as a tablet, an electronic book, and the like. The image processing method comprises the following steps:

step S310, acquiring a first image acquired currently;

step S320, determining that the currently acquired first image meets a symmetry condition;

and step S330, controlling to display a symmetrical composition indicating line on the photographing interface by using the first display parameter.

Through the embodiment, whether the object capable of carrying out composition photographing in a symmetrical composition mode exists in the current photographing picture can be automatically detected, if yes, the symmetrical composition indicating line is controlled to be displayed, and if not, the symmetrical composition indicating line is not displayed, so that the user can be assisted in composition.

In step S310, a currently acquired first image is acquired. In particular, the mobile terminal is configured with an image acquisition device, e.g. a camera. When the mobile terminal detects that the camera is started, the camera is controlled to collect images, and the collected images are displayed through a display of the mobile terminal. The currently acquired first image refers to an image acquired in real time, and the image is taken as the first image.

In step S320, it is determined that the currently acquired first image satisfies a symmetry condition. In this embodiment, step S320 is to determine that there is a symmetric object satisfying a symmetry condition in the currently acquired first image. Specifically, the object included in the first image is detected in real time through a symmetry detection algorithm, and when it is detected that the object included in the first image has a symmetric structure, it is determined that the currently acquired first image satisfies a symmetry condition. For example, fig. 4 shows a first image currently acquired, and a symmetry detection algorithm detects that a portal in the first image is a symmetric structure, so that the first image is determined to satisfy a symmetry condition. Wherein the symmetry condition includes horizontal symmetry and vertical symmetry.

In step S330, control displays a symmetrical composition indicating line with a first display parameter on the photographing interface.

Specifically, when the first image is detected to satisfy the symmetric structure, a symmetric composition indicating line is displayed in the current photographing interface. Wherein the symmetrical composition indicating lines include horizontal indicating lines and vertical indicating lines. The first display parameter refers to a parameter for controlling the display manner of the indicator line, for example, the first display parameter may be a color parameter, a transparency parameter, a line type parameter, and the like, wherein the color parameter may be red, and the line type may be a dotted line, and the like. The symmetric composition indicating line is an indicating line with reference to an image displayed on the display screen, for example, when the display screen displays the image in a full screen, the indicating line is displayed in the center of the display screen, that is, the position where the symmetric composition indicating line is displayed at this time is not necessarily the position of the symmetry axis of the symmetric structure satisfying the symmetry condition in the first image.

It should be noted that, when the currently acquired first image does not satisfy the symmetry condition, the symmetric composition indicating line is not displayed.

Through the embodiment, when a user takes a picture, whether a symmetrical composition can be adopted for framing can be automatically judged according to the currently acquired image, and the symmetrical indicating lines are displayed to assist the user in composing the picture.

Further, in order to better assist the user in performing the symmetric composition, the method provided by the present application, as shown in fig. 5, further includes the following steps:

step S340, controlling and adjusting image acquisition parameters, and controlling and updating the currently acquired first image to a corresponding second image;

step S350, determining that the symmetry axis of the second image is overlapped with the symmetrical composition indicating line;

and step S360, controlling to display the symmetrical composition indicating line by a second display parameter.

Through the embodiment, the user can more intuitively know whether the current composition angle meets the requirement of the symmetrical composition.

In step S340, controlling to adjust the image capturing parameters and controlling to update the currently captured first image to the corresponding second image. Specifically, the image acquisition parameter refers to a parameter that affects the content of an acquired image, such as a view angle or the like. The currently acquired image is changed by adjusting the viewing angle of the mobile terminal, for example, as shown in fig. 6A and 6B, fig. 6A is a currently acquired first image, and the viewing angle of the camera is adjusted to move the first image to the left as a whole to obtain a second image.

In step S350, it is determined that the axis of symmetry of the second image coincides with the symmetrical composition indicating line.

Wherein the symmetry axis of the second image is a symmetry axis referring to a symmetric structure in the second image, and the symmetry axis of the second image coincides with the symmetric composition indicating line by changing the image acquisition parameters. In the present embodiment, step S350 may be performed by:

step S3501, obtaining a symmetry axis of the symmetric object;

step S3502, when the position information of the symmetry axis is the same as the position information of the symmetrical composition indicating line, determining that the symmetry axis of the second image coincides with the symmetrical composition indicating line.

In step S3501, the symmetric object is an object satisfying the symmetry condition in the first image, such as the door symmetric structure in fig. 4 and the floor symmetric structure in fig. 6A. In step S3502, the position information of the symmetry axis of the symmetric object in the second image is calculated in real time and compared with the position information of the symmetric composition indicating line to determine whether the two coincide, and when the position information of the symmetry axis and the position information of the symmetric composition indicating line are the same or similar, it is determined that the symmetry axis of the second image coincides with the symmetric composition indicating line.

In an alternative embodiment, step S3501 may be performed by:

step S35011, segmenting the first image to form a first sub-image and a second sub-image;

step S35012, extracting a first feature point set of the first sub-image and a second feature point set of the second sub-image;

step S35013, obtaining first coordinate information of each first feature point in the first feature point set and second coordinate information of each second feature point in the second feature point set;

step S35014, determining a symmetry axis of the symmetric object according to the first coordinate information and the second coordinate information.

Specifically, in step S35011, a symmetry type of the first image is acquired, wherein the symmetry type includes horizontal symmetry and vertical symmetry; a segmentation type of the first image according to the symmetry type, the segmentation type including horizontal segmentation and vertical segmentation; and segmenting the first image according to the segmentation type to form a first sub-image and a second sub-image. For example, as shown in fig. 7, the symmetry type of the first image is vertical symmetry, and the first image is divided along a vertical dotted line. Further, step 35011 further includes the steps of: directly segmenting the first image to obtain an initial first sub-image and an initial second sub-image; determining the initial second sub-image as a second sub-image; and carrying out mirror image turning on the initial first sub-image to obtain the first sub-image. As shown in fig. 8, an image obtained by mirror-flipping the initial first sub-image is the first sub-image, and after the flipping, the direction, position, and other parameter information of an object which may form a symmetric structure in the first sub-image and the second sub-image are the same, so that the subsequent feature point extraction is more accurate.

In step S35012, as shown in fig. 9, in the present embodiment, feature extraction and matching are performed on two pictures of the first sub-image and the second sub-image based on the ORB feature points. In other embodiments, other feature points with better performance (such as SIFT, SURF, etc.) may also be selected, where the ORB feature extraction method is selected mainly in consideration of the balance between performance and speed. Further, the air conditioner is provided with a fan,

in step S35013, there are many mismatches of the feature points obtained in step S35012, and the results of these mismatches may affect the final determination of the central axis of the image. In this embodiment, the first feature points and the second feature points are paired to obtain a plurality of sets of paired points. Specifically, as shown in fig. 10, a GMS mismatch elimination method is adopted, where GMS is a matching screening method based on consideration of motion smoothness and field consistency, and matching points with higher accuracy are obtained by eliminating mismatch. And acquiring first coordinate information of the first characteristic point and second coordinate information of the second characteristic point in each group of matching points. By the method and the device, the calculation accuracy of the symmetry axis in the image can be improved, and further user experience is improved.

In step S35014, a symmetry axis of the symmetric object is determined according to the first coordinate information and the second coordinate information.

Specifically, as shown in fig. 11, according to the matching points screened out last, the matching points are sorted from small to large according to the distance, and the top N pairs are taken. The first abscissa x1 of the first feature point and the second abscissa x2 of the second feature point in each pair of matching points are extracted. Since x1 is the coordinate after mirror-folding and x2 is the coordinate after cutting, both x1 and x2 need to be transformed to the coordinate under the second image, and the calculation formula is: x is (width/2-x1+ width/2+ x2)/2, wherein width is the width of the original picture, and the optimal value is obtained according to the result of calculating the medial axis coordinate x by the N pairs.

Through the embodiment, the symmetry axis in the second image can be acquired in real time, and when the position information of the symmetry axis is the same as that of the symmetrical composition indicating line, the symmetry axis of the second image is determined to be coincident with the symmetrical composition indicating line.

In step S360, control displays the symmetrical composition indicating line with a second display parameter.

Specifically, the second display parameter refers to a parameter for controlling the display manner of the indicator line, for example, the second display parameter may be a color parameter, a transparency parameter, a line type parameter, and the like, where the color parameter may be green, and the line type may be a solid line, and the like. For example, in the process of photographing by the user, once the algorithm detects the symmetric structure, a red line starts to flash in the photographing interface (the red line is the central line of the image, and if the symmetric structure is not detected, no prompt is made), the user moves the camera, the red line is always located at the central position of the photographing interface, and meanwhile, the symmetry axis is identified, when the red line moves to the vicinity of the symmetry axis, the color of the red line turns green, the user is prompted to be located at the symmetric composition at the moment, and the photographing is recommended.

Fig. 12 is a schematic structural component diagram of a mobile terminal 100 according to an embodiment of the present application, where the mobile terminal 100 includes: a touch panel 1071; a processor 110; a memory 109 connected to the processor 110, wherein the memory 109 contains a control instruction, and when the processor 110 reads the control instruction, the mobile terminal 100 is controlled to implement the following steps: acquiring a first image acquired currently; determining that the currently acquired first image meets a symmetry condition; and controlling to display a symmetrical composition indicating line on the photographing interface by using the first display parameter.

The mobile terminal in the embodiment of the invention acquires the current first image in the photographing process, analyzes the content in the first image, judges whether the first image meets the symmetry condition, and if the first image meets the symmetry condition, the object in the first image can be composed in a symmetrical composition mode. By the method, whether the object capable of carrying out composition photographing in a symmetrical composition mode exists in the current photographing picture can be automatically detected, if yes, the symmetrical composition indicating line is controlled to be displayed, and if not, the symmetrical composition indicating line is not displayed, so that the user can be assisted in composition.

An embodiment of the present invention further provides a computer storage medium, where an executable program is stored in the computer storage medium, and when the executable program is executed, the following steps are implemented: acquiring a first image acquired currently; determining that the currently acquired first image meets a symmetry condition; and controlling to display a symmetrical composition indicating line on the photographing interface by using the first display parameter.

The computer storage medium in the embodiment of the invention acquires the current first image in the photographing process, analyzes the content in the first image, judges whether the first image meets the symmetry condition, and if the first image meets the symmetry condition, the object in the first image can be composed in a symmetrical composition mode. By the method, whether the object capable of carrying out composition photographing in a symmetrical composition mode exists in the current photographing picture can be automatically detected, if yes, the symmetrical composition indicating line is controlled to be displayed, and if not, the symmetrical composition indicating line is not displayed, so that the user can be assisted in composition.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. An image processing method, comprising:

acquiring a first image acquired currently;

determining that the currently acquired first image meets a symmetry condition;

and controlling to display a symmetrical composition indicating line on the photographing interface by using the first display parameter.

2. The method of claim 1, wherein the step of determining that the currently acquired first image satisfies a symmetry condition is determining that there is a symmetric object in the currently acquired first image that satisfies the symmetry condition.

3. The method of claim 2, wherein after the step of controlling the display of the symmetrical composition indicator line with the first display parameter on the camera interface, the method further comprises:

controlling and adjusting image acquisition parameters, and controlling to update a currently acquired first image to a corresponding second image;

determining that an axis of symmetry of the second image coincides with the symmetrical composition indicator line;

controlling to display the symmetric composition indicating line with a second display parameter.

4. The method of claim 3, wherein the step of determining that the axis of symmetry of the second image coincides with the symmetric composition indicator line comprises:

acquiring a symmetry axis of the symmetric object;

and when the position information of the symmetry axis is the same as the position information of the symmetrical composition indicating line, determining that the symmetry axis of the second image coincides with the symmetrical composition indicating line.

5. The method of claim 4, wherein the step of obtaining the symmetry axis of the symmetric object comprises:

segmenting the first image to form a first sub-image and a second sub-image;

extracting a first characteristic point set of the first sub-image and a second characteristic point set of the second sub-image;

acquiring first coordinate information of each first feature point in the first feature point set and second coordinate information of each second feature point in the second feature point set;

and determining the symmetry axis of the symmetric object according to the first coordinate information and the second coordinate information.

6. The method of claim 5, wherein the step of segmenting the first image to form a first sub-image and a second sub-image comprises:

acquiring symmetry types of the first image, wherein the symmetry types comprise horizontal symmetry and vertical symmetry;

a segmentation type of the first image according to the symmetry type, the segmentation type including horizontal segmentation and vertical segmentation;

and segmenting the first image according to the segmentation type to form a first sub-image and a second sub-image.

7. The method of claim 5, wherein the step of segmenting the first image to form a first sub-image and a second sub-image comprises:

directly segmenting the first image to obtain an initial first sub-image and an initial second sub-image;

determining the initial second sub-image as a second sub-image;

and carrying out mirror image turning on the initial first sub-image to obtain the first sub-image.

8. The method according to claim 5, wherein the step of obtaining first coordinate information of each first feature point in the first feature point set and second coordinate information of each second feature point in the second feature point set comprises:

pairing the first characteristic points and the second characteristic points to obtain a plurality of groups of paired points;

and acquiring first coordinate information of the first characteristic point and second coordinate information of the second characteristic point in each group of matching points.

9. A mobile terminal, characterized in that the mobile terminal comprises a processor and a memory;

the memory is used for storing an executable program;

the processor is configured to execute the executable program to implement the image processing method according to any one of claims 1 to 8.

10. A computer storage medium having stored thereon an executable program which when executed implements the image processing method of any one of claims 1 to 8.