CN107566734B

CN107566734B - Intelligent control method, terminal and computer readable storage medium for portrait photographing

Info

Publication number: CN107566734B
Application number: CN201710910633.XA
Authority: CN
Inventors: 姜晴
Original assignee: Nubia Technology Co Ltd
Current assignee: Nubia Technology Co Ltd
Priority date: 2017-09-29
Filing date: 2017-09-29
Publication date: 2020-03-17
Anticipated expiration: 2037-09-29
Also published as: CN107566734A

Abstract

The invention discloses an intelligent control method, a terminal and a computer readable storage medium for portrait photographing, and belongs to the technical field of communication. The method comprises the following steps: recognizing the face in the current viewing preview frame in a pre-shooting mode; adjusting the focal length of the camera according to the recognized face to enable the face in the adjusted viewing preview frame to reach a preset condition; and prompting a user to shoot, and shooting the current viewing preview frame and storing the current viewing preview frame as a shot picture when a shooting instruction is detected. Therefore, when the self-timer is carried out, the shooting focal length of the camera can be adjusted according to the face recognized in the viewing preview frame, so that a proper viewing range is obtained, the distance or the posture of the handheld terminal does not need to be adjusted by a user to adjust the viewing range, meanwhile, the face is too large when the self-timer is carried out, and the shooting intelligence during the self-timer is better improved.

Description

Intelligent control method, terminal and computer readable storage medium for portrait photographing

Technical Field

The invention relates to the technical field of communication, in particular to an intelligent control method for portrait shooting, a terminal and a computer readable storage medium.

Background

At present, terminals such as smart phones and the like become necessities necessary for human hands, and the current terminals are generally provided with front cameras, so that self-shooting through the front cameras becomes a common choice for people to shoot. When shooing, in order to obtain better effect of shooing, people use from rapping bar usually now and autodyne to can manually adjust the range of finding a view when autodyne angle and autodyne, in order to ensure that can shoot all people that need shoot, can avoid the part people who shoots again simultaneously because the distance lens is nearer and the great people face of shooting. However, in many situations, people do not necessarily carry a selfie stick, and at this time, under the condition that there is no selfie stick, if self-shooting is performed, the number of self-shooting people is large, and at this time, because the length of the hands is limited and the number of people is large, the shooting range of the lens often does not meet the requirement, enough people are usually not plugged in the framing preview frame, and the face of the frontmost person holding the mobile phone is large. Therefore, it is necessary to provide an intelligent control method for portrait photographing, a terminal and a computer-readable storage medium to avoid the above situation.

Disclosure of Invention

The invention mainly aims to provide an intelligent control method, a terminal and a computer readable storage medium for portrait shooting, and aims to solve the problem that in the prior art, a terminal cannot intelligently adjust a view range during self shooting.

In order to achieve the above object, the present invention provides an intelligent control method for portrait photographing, the method comprising the steps of:

recognizing the face in the current viewing preview frame in a pre-shooting mode;

adjusting the focal length of the camera according to the recognized face to enable the face in the adjusted viewing preview frame to reach a preset condition;

and prompting a user to shoot, and shooting the current viewing preview frame and storing the current viewing preview frame as a shot picture when a shooting instruction is detected.

Optionally, the step of adjusting the focal length of the camera according to the recognized face to make the face in the adjusted viewing preview frame reach the preset condition specifically includes:

confirming a portrait corresponding to the largest face from the recognized faces;

adjusting the focal length of the camera to enable the portrait proportion to reach a first preset proportion;

judging the proportion of the maximum face occupying the viewing preview frame in the viewing preview frame at the moment;

and if the proportion is not greater than the preset value, confirming that the face in the adjusted viewing preview frame reaches the preset condition.

Optionally, the step of adjusting the focal length of the camera according to the recognized face to make the face in the adjusted viewing preview frame reach the preset condition further includes:

and if the ratio is larger than the preset value, continuously adjusting the focal length of the camera until the ratio of the maximum face occupying the view-finding preview frame is not larger than the preset value.

confirming the number of recognized faces;

if the number of the recognized faces is smaller than the preset number, confirming the portrait corresponding to the largest face from the recognized faces;

adjusting the focal length of the camera to enable the portrait proportion to reach a second preset proportion;

judging the number of the faces identified in the viewing preview frame at the moment;

and if the number of the faces identified again is not less than the preset number, confirming that the faces in the viewing preview frame reach the preset condition at the moment.

Optionally, the method further comprises:

when the user is detected to start the front photographing mode, the user is prompted to input the number of persons to be photographed as a preset number.

In addition, in order to achieve the above object, the present invention further provides a terminal, where the terminal is provided with a front camera, the terminal further includes a memory, a processor, and an intelligent control program for portrait photographing, stored in the memory and operable on the processor, and the processor executes the intelligent control program for portrait photographing to implement the following steps:

and shooting the current view preview frame and saving the current view preview frame as a shot picture.

Optionally, the processor executes the intelligent control program for photographing the human image to adjust the focal length of the camera according to the recognized human face, so that the step of adjusting the human face in the view-finding preview frame to reach the preset condition specifically includes:

Optionally, the processor executes the intelligent control program for photographing the human image to adjust the focal length of the camera according to the recognized human face, so that the step of adjusting the human face in the viewing preview frame to reach the preset condition further includes:

confirming the number of recognized faces;

In addition, to achieve the above object, the present invention further provides a computer-readable storage medium storing a portrait photographing intelligent control program, which is executable by at least one processor to cause the at least one processor to execute the steps of the portrait photographing intelligent control method.

The invention provides an intelligent control method, a terminal and a computer readable storage medium for portrait photographing, which are used for identifying faces in a current view-finding preview frame in a preposed photographing mode; adjusting the focal length of the camera according to the recognized face to enable the face in the adjusted viewing preview frame to reach a preset condition; and prompting a user to shoot, and shooting the current viewing preview frame and storing the current viewing preview frame as a shot picture when a shooting instruction is detected. Therefore, when the self-timer is carried out, the shooting focal length of the camera can be adjusted according to the face recognized in the viewing preview frame, so that a proper viewing range is obtained, the distance or the posture of the handheld terminal does not need to be adjusted by a user to adjust the viewing range, meanwhile, the face is too large when the self-timer is carried out, and the shooting intelligence during the self-timer is better improved.

Drawings

Fig. 1 is a schematic diagram of a hardware structure of an optional terminal for implementing various embodiments of the present invention;

fig. 2 is a schematic diagram of a communication network system of the terminal shown in fig. 1;

fig. 3 is a schematic flow chart of an intelligent control method for portrait photographing according to a first embodiment of the present invention;

FIG. 4 is a detailed flowchart of step S302 in FIG. 3 in a second embodiment;

FIG. 5 is a detailed flowchart of step S302 in FIG. 3 in a third embodiment;

FIG. 6 is a schematic diagram of a terminal shortcut setup interface according to an embodiment of the present invention;

FIG. 7 is a schematic reference diagram of a camera photographing interface when the terminal performs self-photographing in the present invention;

FIG. 8 is a schematic reference diagram of another camera photographing interface when the terminal performs self-photographing in the present invention;

fig. 9 is a functional module diagram of an intelligent control program for photographing a portrait according to a second embodiment of the present invention.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

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 in the present invention can 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.

In the following description, reference will be made to a mobile terminal as an example, and it will be understood by those skilled in the art that the configuration 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 terminal for implementing various embodiments of the present invention, the 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 terminal configuration shown in fig. 1 is not intended to be limiting, and that the terminal may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.

The following describes the various components of the 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 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 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 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 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 terminal 100 also includes at least one sensor 105, such as a light sensor, 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 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 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 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 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 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 an external device and transmit the received input to one or more elements within the terminal 100 or may be used to transmit data between the terminal 100 and the external device.

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 terminal, connects various parts of the entire terminal using various interfaces and lines, and performs various functions of the 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 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 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 through a power management system, so as to manage charging, discharging, and power consumption management functions through the power management system.

Although not shown in fig. 1, the 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 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 functions Entity) 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 terminal hardware structure and communication network system, the present invention provides various embodiments of the method.

The first embodiment is as follows:

referring to fig. 3, a schematic flow chart of an intelligent control method for portrait photographing according to a first embodiment of the present invention is shown, and the method is mainly used in the terminal, and includes the steps of:

step S301, recognizing the face in the current viewing preview frame in the pre-shooting mode;

specifically, the front-end shooting mode is a self-shooting mode, when the self-shooting mode is started, a current view preview frame is displayed on a terminal main interface at the moment and used for displaying a view range of a current lens, at the moment, all faces in the view preview frame can be recognized by a terminal camera through face recognition, the face information includes information of each face, and the face information includes face features, face size, the number of recognized faces and the like.

It can be understood that, in the invention, the intelligent self-timer function can be started in the self-timer mode, and after the intelligent self-timer function is started, the intelligent self-timer function can be realized by the invention. The user can click to start the intelligent self-photographing function through the terminal shortcut setting interface, and a reference schematic diagram of the terminal shortcut setting interface in each embodiment of the invention is shown in fig. 6. The user can execute a pull-down operation on the terminal main interface to pull out a pull-down navigation menu, enter a shortcut setting interface as shown in fig. 6, and click an intelligent self-timer option to start an intelligent self-timer function.

Step S302, adjusting the focal length of the camera according to the recognized face to enable the face in the adjusted viewing preview frame to reach a preset condition;

specifically, here, the face reaches the preset condition in the preview frame of finding a view after the regulation, and the scope of finding a view of also camera reaches the preset condition, and the preset condition can have a plurality ofly, includes: the number of the faces in the viewing preview frame reaches a preset number, the proportion occupied by the largest face in the viewing preview frame is not more than a preset proportion, or the proportion of the portrait of the largest face in the viewing preview frame reaches a preset proportion (for example, the optimal proportion is a half-length portrait, namely 50%), and the like. The preset conditions can be met by adjusting the viewing range of the camera, the terminal further adjusts the focal length of the camera on the basis of the recognized face, the viewing range can be changed, the viewing range is changed, the face recognized in the viewing preview frame can also be found to change, the terminal recognizes the face recognized in the viewing preview frame in real time, and adjusts the shooting focal length of the camera in real time until the preset conditions are met by the adjusted face in the viewing preview frame. During adjustment, in order to increase the adjustment speed, during first adjustment, coarse adjustment may be performed to directly adjust the focal length of the camera to a value at a time, and at the focal length, the ratio of the portrait corresponding to the largest face in the view finder frame reaches a first preset ratio, where the first preset ratio may be 50%, that is, the portrait corresponding to the largest face is a half-length portrait. The portrait proportion can be confirmed by matching with a preset portrait template, and portrait templates with different proportions, such as a half-body portrait template, a whole-body portrait template and the like, can be prestored in the terminal. And if the face of the viewing preview frame does not reach the preset condition after the coarse adjustment, the terminal further adjusts the camera focus step by step on the basis of the coarse adjustment at the moment until the face in the viewing preview frame reaches the preset condition (the adjustment amplitude of each time is smaller than the first coarse adjustment).

And step S303, prompting a user to shoot, and shooting the current viewing preview frame and storing the current viewing preview frame as a shot picture when a shooting instruction is detected.

After the terminal finishes adjusting the focal length of the camera, namely after the face in the viewing preview frame reaches the preset condition, the user can shoot normally. The terminal can prompt the user to shoot through the prompt message displayed temporarily on the current view-finding frame, for example, displaying 'adjustment is completed, please start shooting' on the current view-finding frame, the display time is 1 second, when the user presses a shooting button, the terminal detects a shooting instruction, at this moment, the terminal shoots the current view-finding preview frame, and the shot image is stored as a shot photo.

In the intelligent control method for portrait shooting of the embodiment, the face in the current view-finding preview frame is identified in the pre-shooting mode; adjusting the focal length of the camera according to the recognized face to enable the face in the adjusted viewing preview frame to reach a preset condition; and prompting a user to shoot, and shooting the current viewing preview frame and storing the current viewing preview frame as a shot picture when a shooting instruction is detected. Therefore, when the self-timer is carried out, the shooting focal length of the camera can be adjusted according to the face recognized in the viewing preview frame, so that a proper viewing range is obtained, the distance or the posture of the handheld terminal does not need to be adjusted by a user to adjust the viewing range, meanwhile, the face is too large when the self-timer is carried out, and the shooting intelligence during the self-timer is better improved.

Example two:

the second embodiment of the present invention further provides another intelligent control method for portrait photographing based on the first embodiment, in this embodiment, the method also includes steps S301 to S303, please refer to fig. 4, which only differs from the first embodiment in that: in this embodiment, step S302 specifically includes the following steps:

step S401, confirming a portrait corresponding to the largest face from the recognized faces;

step S402, adjusting the focal length of a camera to enable the portrait proportion to reach a first preset proportion;

step S403, judging the proportion of the maximum face occupying the viewing preview frame in the viewing preview frame at the moment; if the ratio is not greater than the predetermined value, go to step S404, otherwise, go to step S405

And step S404, confirming that the face in the adjusted viewing preview frame reaches a preset condition.

And S405, if the proportion is larger than the preset value, continuing to adjust the focal length of the camera until the proportion of the maximum face occupying the view-finding preview frame is not larger than the preset value.

Specifically, in this embodiment, the default preset condition is: the occupied proportion of the maximum face in the viewing preview frame is not more than the preset proportion. When self-shooting is carried out, the number of the faces in the viewing preview frame is generally larger than 1, the terminal determines a maximum face from the identified faces, and the focal length of the camera is adjusted on the basis of the face corresponding to the maximum face. Firstly, coarse adjustment is carried out, the focal length of the camera is adjusted to a value with a larger adjustment range, and under the focal length, the portrait proportion corresponding to the largest face in the view-finding frame reaches a first preset proportion, wherein the first preset proportion can be 50%, that is, the portrait corresponding to the largest face is a half-length portrait. The portrait proportion can be confirmed by matching with a preset portrait template, and portrait templates with different proportions, such as a half-body portrait template, a whole-body portrait template and the like, can be prestored in the terminal. After coarse adjustment, judging the face recognized in the viewing preview frame again, confirming whether the proportion of the largest face occupying the viewing preview frame in the viewing preview frame at the moment is not more than a preset value, if so, indicating that the viewing range of the camera reaches a preset condition at the moment, and confirming that the face in the adjusted viewing preview frame reaches the preset condition without adjustment. If the proportion of the largest face in the viewing preview frame occupying the viewing preview frame is larger than the preset value at the moment, the fact that the face in the viewing preview frame does not reach the preset condition is indicated, at the moment, the terminal is further finely adjusted on the basis of the rough adjustment, the focal length of the camera is gradually adjusted (the adjusting amplitude is smaller than that of the rough adjustment), and the situation is not reached until the proportion of the largest face in the viewing preview frame occupying the viewing preview frame is larger than the preset value.

It is understood that the preset value may be set to a default value, for example, 10%, or may be intelligently adjusted according to the number of recognized faces and the total proportion of all faces occupying the preview box, for example, if the currently recognized faces are 10 faces, the currently recognized faces occupy 80% of the area of the preview box as a whole, and each face occupies 8% of the area of the preview box as a whole, then the preset value may be set to 10% (by taking 30% of the average value as a standard).

Please refer to fig. 7, which is a schematic reference diagram of a camera shooting interface when the terminal performs self-shooting according to the present invention. As shown in the figure, when the self-photographing mode is entered, only two faces can be recognized in the camera view-finding preview frame, and a preset value is 10%, at this time, the proportion of the largest face occupying the view-finding preview frame exceeds 10%, so the focal length of the camera needs to be further adjusted, the terminal firstly adjusts the portrait corresponding to the face into a half-body portrait, after the adjustment, the camera photographing interface is as shown in fig. 8, which shows a schematic reference diagram of the camera photographing interface after the focal length adjustment, at this time, 5 faces can be recognized in the view-finding preview frame, and assuming that the proportion of the largest face occupying the view-finding preview frame in the 5 faces at this time is less than 10%, the terminal does not need to adjust the focal length of the camera. It can be understood that, if the proportion of the largest face in the 5 faces identified in the view preview box in fig. 8 occupying the view preview box after the adjustment is still greater than 10%, the terminal will continue to perform fine adjustment on the focal length of the camera until the proportion of the largest face in the view preview box occupying the view preview box is not greater than 10%.

According to the intelligent control method for portrait shooting, the focal length of the camera is adjusted on the basis of the largest face in the viewing preview frame, a more appropriate viewing range is obtained, and the problem that the face is too large in the viewing range of the camera during final shooting is avoided.

Example three:

the third embodiment of the present invention further provides another intelligent control method for portrait photographing based on the first embodiment, in this embodiment, the method also includes steps S301 to S303, please refer to fig. 5, which only differs from the first embodiment in that: in this embodiment, step S302 specifically includes the following steps:

step S501, confirming the number of recognized faces; if the number of the recognized faces is less than the preset number, the step S502 is performed, and if the number of the recognized faces is not less than the preset number, the step S505 is performed;

step S502, confirming a portrait corresponding to the largest face from the recognized faces;

step S503, adjusting the focal length of the camera to enable the portrait proportion to reach a second preset proportion

Step S504, judge and judge the human face quantity recognized in the preview frame of finding a view at this moment; if the number of the faces identified again is not less than the preset number, the step S505 is performed, otherwise, the step S506 is performed;

and step S505, confirming that the face in the view preview frame reaches the preset condition at the moment.

And step S506, continuously adjusting the focal length of the camera until the number of the faces identified by the viewing preview frame is not less than the preset number.

Specifically, in this embodiment, the default preset condition is: the number of faces in the viewing preview frame reaches a preset number. When self-shooting is carried out, the terminal firstly confirms whether the number of the faces recognized in the current view-finding preview frame is smaller than the preset number, if so, the view-finding range needs to be further adjusted, the terminal determines a maximum face from the recognized faces, and the focal length of the camera is adjusted on the basis of the face corresponding to the maximum face. Firstly, coarse adjustment is carried out, the focal length of the camera is adjusted to a value with a larger adjustment range, and under the focal length, the portrait proportion corresponding to the largest face in the view-finding frame reaches a second preset proportion, wherein the second preset proportion can also be 50%, that is, the portrait corresponding to the largest face is a half-length portrait. The portrait proportion can be confirmed by matching with a preset portrait template, and portrait templates with different proportions, such as a half-body portrait template, a whole-body portrait template and the like, can be prestored in the terminal. After coarse adjustment, judging the faces recognized in the viewing preview frame again, confirming whether the number of the faces recognized in the viewing preview frame reaches the preset number or not, if so, indicating that the viewing range of the camera reaches the preset condition, and confirming that the faces in the adjusted viewing preview frame reach the preset condition without adjustment. If the number of faces recognizable in the viewing preview frame is still smaller than the preset number, it is indicated that the number of faces of the viewing preview frame still does not reach the preset condition, at this time, the terminal further finely adjusts the camera focal length (the adjustment amplitude is smaller than that during rough adjustment) on the basis of rough adjustment until the number of faces recognizable in the viewing preview frame reaches the preset number.

Further, in this embodiment, the method further includes the following steps:

when the pre-shooting mode is detected to be started, prompting the user to input the number of the shot people as a preset number.

Specifically, in this embodiment, the default preset condition is: the number of faces in the viewing preview frame reaches a preset number. Here, the preset number may be prompted by the terminal for user input when the pre-photographing mode is turned on, for example, if the number of parties is 15 when the user is a second party to self-photograph, the user may input 15, and the preset number is 15. Here, the user may input the preset number by voice or may input the preset number by using a virtual keyboard, which is not limited in the present invention.

According to the intelligent control method for portrait shooting, when the faces to be shot cannot be contained in the view-finding frame, the focal length of the camera is adjusted on the basis of the largest face in the view-finding preview frame, so that the view-finding range can reach the required shooting range, and all the faces to be shot are contained.

Example four:

in addition, the invention provides an intelligent control program for portrait shooting.

Fig. 9 is a schematic diagram of functional modules of an intelligent control program 90 for photographing a portrait according to a fourth embodiment of the present invention. In this embodiment, the portrait photographing intelligent control program 90 may be divided into one or more modules, and the one or more modules are stored in the memory 109 of the terminal 100 and executed by one or more processors (in this embodiment, the processor 110), so as to complete the present invention. For example, in fig. 9, the portrait photographing intelligent control program 90 may be divided into a recognition module 91, an adjustment module 92, and a photographing module 93. The module referred to in the present invention refers to a series of readable computer program instruction segments capable of performing specific functions, which are more suitable than computer programs for describing the execution process of software in the terminal 100. The specific functions of the above-described functional modules 91 to 93 will be described in detail below. Wherein:

the recognition module 91 is configured to recognize a face in the current viewing preview frame in the pre-shooting mode;

specifically, the front-end shooting mode is a self-shooting mode, when the self-shooting mode is started, at this time, a current view preview frame is displayed on a main interface of the terminal to display a view range of a current lens, at this time, the recognition module 91 can recognize all faces in the view preview frame through face recognition by the terminal camera, including information of each face, the face information including face features, face size, the number of recognized faces, and the like, which is not limited in this respect.

The adjusting module 92 is configured to adjust the focal length of the camera according to the recognized face, so that the face in the adjusted viewing preview frame reaches a preset condition;

specifically, here, the face reaches the preset condition in the preview frame of finding a view after the regulation, and the scope of finding a view of also camera reaches the preset condition, and the preset condition can have a plurality ofly, includes: the number of the faces in the viewing preview frame reaches a preset number, the proportion occupied by the largest face in the viewing preview frame is not more than a preset proportion, or the proportion of the portrait of the largest face in the viewing preview frame reaches a preset proportion (for example, the optimal proportion is a half-length portrait, namely 50%), and the like. The preset conditions can be met by adjusting the viewing range of the camera, the adjusting module 92 further adjusts the focal length of the camera on the basis of the recognized face, the viewing range can be changed, the viewing range is changed, the face recognized in the viewing preview frame can also be found to be changed, the recognizing module 91 recognizes the face recognized in the viewing preview frame in real time, and the adjusting module 92 adjusts the shooting focal length of the camera in real time until the preset conditions are met by the adjusted face in the viewing preview frame. During adjustment, in order to increase the adjustment speed, during first adjustment, coarse adjustment may be performed to directly adjust the focal length of the camera to a value at a time, and at the focal length, the ratio of the portrait corresponding to the largest face in the view finder frame reaches a first preset ratio, where the first preset ratio may be 50%, that is, the portrait corresponding to the largest face is a half-length portrait. The portrait proportion can be confirmed by matching with a preset portrait template, and portrait templates with different proportions, such as a half-body portrait template, a whole-body portrait template and the like, can be prestored in the terminal. If the face of the viewing preview frame does not reach the preset condition after the coarse adjustment, at this time, the adjusting module 92 further fine-adjusts the camera focal length step by step (the adjusting range of each time is smaller than the first coarse adjustment) on the basis of the coarse adjustment until the face of the viewing preview frame reaches the preset condition.

And the shooting module 93 prompts a user to shoot, and when a shooting instruction is detected, shoots the current viewing preview frame and stores the current viewing preview frame as a shot picture.

After the adjustment module 92 adjusts the focal length of the camera, that is, after the face in the viewing preview frame reaches the preset condition, it indicates that the user can normally take a picture. The photographing module 93 may prompt the user to perform photographing through a prompt message displayed temporarily on the current viewfinder, for example, displaying "adjust, please start photographing" on the current viewfinder for 1 second when the user presses the photographing button. The photographing module 93 will detect the photographing command, at this time. The photographing module 93 photographs the current view preview frame and stores the photographed image as a photographed picture.

Identifying the face in the current viewing preview frame in a front-end photographing mode by executing the intelligent control program for photographing the portrait of the embodiment; adjusting the focal length of the camera according to the recognized face to enable the face in the adjusted viewing preview frame to reach a preset condition; and prompting a user to shoot, and shooting the current viewing preview frame and storing the current viewing preview frame as a shot picture when a shooting instruction is detected. Therefore, when the self-timer is carried out, the shooting focal length of the camera can be adjusted according to the face recognized in the viewing preview frame, so that a proper viewing range is obtained, the distance or the posture of the handheld terminal does not need to be adjusted by a user to adjust the viewing range, meanwhile, the face is too large when the self-timer is carried out, and the shooting intelligence during the self-timer is better improved.

Example five:

the fifth embodiment of the present invention further provides another intelligent control program for portrait photographing based on the fourth embodiment, in this embodiment, the program also includes functional modules 91-93, and the difference from the fourth embodiment is only that: in this embodiment, the adjusting module 92 specifically includes:

the recognition confirming unit is used for confirming the portrait corresponding to the largest face from the recognized faces;

the focal length rough adjusting unit is used for adjusting the focal length of the camera to enable the portrait proportion to reach a first preset proportion;

the first judging unit is used for judging the proportion of the maximum face occupying the framing preview frame in the framing preview frame at the moment;

and the framing confirmation unit is used for confirming that the face in the adjusted framing preview frame reaches a preset condition when the proportion is not greater than a preset value.

And the focal length fine-tuning unit is used for continuously adjusting the focal length of the camera when the proportion is larger than the preset value until the proportion of the maximum face occupying the framing preview frame is not larger than the preset value.

Specifically, in this embodiment, the default preset condition is: the occupied proportion of the maximum face in the viewing preview frame is not more than the preset proportion. When self-shooting is carried out, the number of the faces in the viewing preview frame is generally larger than 1, the identification confirming unit determines a maximum face from the identified faces, and the focal length of the camera is adjusted on the basis of the face corresponding to the maximum face. Firstly, the focus rough adjustment unit performs rough adjustment to adjust the focus of the camera to a value with a larger adjustment range, and at the focus, the ratio of the portrait corresponding to the largest face in the view finder frame reaches a first preset ratio, where the first preset ratio may be 50%, that is, the portrait corresponding to the largest face is a half-length portrait. The portrait proportion can be confirmed by matching with a preset portrait template, and portrait templates with different proportions, such as a half-body portrait template, a whole-body portrait template and the like, can be prestored in the terminal. After coarse adjustment, the first judging unit judges the face recognized in the viewing preview frame again, whether the proportion of the largest face in the viewing preview frame occupying the viewing preview frame at the moment is not larger than a preset value is confirmed, if so, the viewing range of the camera reaches a preset condition, and the viewing confirming unit can confirm that the face in the adjusted viewing preview frame reaches the preset condition without adjustment. If the proportion of the largest face in the viewing preview frame occupying the viewing preview frame is larger than the preset value at the moment, the fact that the face in the viewing preview frame does not reach the preset condition is indicated, at the moment, the focal length fine adjustment unit further finely adjusts the focal length of the camera step by step on the basis of the rough adjustment, and the adjustment amplitude is smaller than the adjustment amplitude of the rough adjustment until the proportion of the largest face in the viewing preview frame occupying the viewing preview frame is not larger than the preset value.

Through executing the intelligent control program for portrait shooting of the embodiment, the focal length of the camera is adjusted on the basis of the maximum face in the viewing preview frame, so that a more appropriate viewing range is obtained, and the problem that the face is too large in the viewing range of the camera during final shooting is avoided.

Example six:

the sixth embodiment of the present invention further provides another intelligent control program for portrait photographing based on the fourth embodiment, in this embodiment, the program also includes functional modules 91-93, and the difference from the fourth embodiment is only that: in this embodiment, the adjusting module 92 specifically includes:

a number recognition unit for confirming the number of recognized faces;

the face confirmation unit is used for confirming the portrait corresponding to the largest face from the recognized faces when the number of the recognized faces is smaller than the preset number;

a framing rough adjustment unit for adjusting the focal length of the camera to make the portrait ratio reach a second preset ratio when the number of the recognized faces is not less than a preset number

The second judging unit is used for judging the number of the faces identified in the viewing preview frame when the number of the identified faces is not less than the preset number;

and the focal length confirming unit is used for confirming that the face in the framing preview frame reaches the preset condition at the moment when the number of the faces identified again is not less than the preset number.

And the framing fine adjustment unit is used for continuously adjusting the focal length of the camera until the number of the faces identified by the framing preview frame is not less than the preset number when the number of the faces identified again is not less than the preset number.

Specifically, in this embodiment, the default preset condition is: the number of faces in the viewing preview frame reaches a preset number. When self-shooting is carried out, the number recognition unit firstly confirms whether the number of the faces recognized in the current view-finding preview frame is smaller than the preset number, if so, the view-finding range needs to be further adjusted, the face confirmation unit determines a maximum face from the recognized faces, and the focal length of the camera is adjusted on the basis of the face corresponding to the maximum face. Firstly, the view-finding rough-adjusting unit carries out rough adjustment, the focal length of the camera is adjusted to a value with a larger adjusting range, and under the focal length, the portrait proportion corresponding to the largest face in the view-finding frame reaches a second preset proportion, wherein the second preset proportion can also be 50%, namely, the portrait corresponding to the largest face is a half-length portrait. The portrait proportion can be confirmed by matching with a preset portrait template, and portrait templates with different proportions, such as a half-body portrait template, a whole-body portrait template and the like, can be prestored in the terminal. After coarse adjustment, the second judging unit judges the faces recognized in the viewing preview frame again, whether the number of the faces recognized in the viewing preview frame reaches the preset number is confirmed, if so, the viewing range of the camera reaches the preset condition, and the viewing confirming unit can confirm that the faces in the adjusted viewing preview frame reach the preset condition without adjustment. If the number of faces recognizable in the viewing preview frame is still smaller than the preset number, it is indicated that the number of faces in the viewing preview frame still does not reach the preset condition, and at this time, the focal length fine-tuning unit further fine-tunes based on the coarse tuning, and gradually adjusts the focal length of the camera (the adjustment range is smaller than the adjustment range during the coarse tuning) until the number of faces recognizable in the viewing preview frame reaches the preset number.

Further, in this embodiment, the intelligent control of portrait photographing further includes:

and the input module is used for prompting the user to input the number of the photographing people as the preset number when the opening of the front photographing mode is detected.

Specifically, in this embodiment, the default preset condition is: the number of faces in the viewing preview frame reaches a preset number. Here, the preset number may be prompted by the input module for the user to input when the pre-photographing mode is turned on, for example, if the number of parties is 15 when the user is a second party to take a picture, the user may input 15, and the preset number is 15. Here, the user may input the preset number by voice or may input the preset number by using a virtual keyboard, which is not limited in the present invention.

Through the intelligent control program that shoots of people's image of carrying out this embodiment, when can't hold the people's face that needs to shoot in the frame of finding a view, adjust the camera focus on the basis of the biggest people's face in the preview frame of finding a view for the range of finding a view can reach the shooting scope of needs, holds all people's faces that need to shoot.

The invention further provides a computer-readable storage medium, wherein the intelligent portrait photographing control program is stored on the computer-readable storage medium, and when being executed by a processor, the intelligent portrait photographing control program realizes the intelligent portrait photographing control method.

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 intelligent control method for portrait photographing is characterized by comprising the following steps:

prompting a user to shoot, and shooting a current viewing preview frame and storing the current viewing preview frame as a shot picture when a shooting instruction is detected;

the method comprises the following steps of adjusting the focal length of the camera according to the recognized face, and enabling the face in the adjusted view-finding preview frame to reach a preset condition, wherein the steps comprise:

confirming the number of recognized faces;

2. The intelligent control method for portrait photographing according to claim 1, wherein the method further comprises:

3. The terminal is provided with a front camera and is characterized by further comprising a memory, a processor and an intelligent portrait photographing control program, wherein the intelligent portrait photographing control program is stored in the memory and can run on the processor, and the processor executes the intelligent portrait photographing control program to realize the following steps:

shooting a current viewing preview frame and storing the current viewing preview frame as a shot picture;

the processor executes the intelligent control program for photographing the portrait to realize that the focal length of the camera is adjusted according to the recognized face, so that the steps of adjusting the face in the framing preview frame to reach the preset conditions specifically comprise:

confirming the number of recognized faces;

4. A computer-readable storage medium storing a portrait photo-taking intelligent control program executable by at least one processor to cause the at least one processor to perform the steps of the portrait photo-taking intelligent control method according to any one of claims 1-2.