WO2019024007A1

WO2019024007A1 - Photographing interface preview switching method and switching apparatus for smart device

Info

Publication number: WO2019024007A1
Application number: PCT/CN2017/095664
Authority: WO
Inventors: 陈飞飞
Original assignee: 深圳传音通讯有限公司
Priority date: 2017-08-02
Filing date: 2017-08-02
Publication date: 2019-02-07

Abstract

A photographing interface preview switching method for a smart device, characterized in that the switching method comprises: activating a camera of the smart device, displaying, on a photographing interface of the smart device, a first current picture of the camera in a first preview scale (101); receiving a switching instruction for switching the first preview scale to a second preview switching scale (102); cutting the first current picture by a display frame corresponding to the second preview scale, keeping the display picture in the display frame as a second current picture, and displaying the second current picture in the photographing interface (103). The method supports various switching operations, and can realize delay-free switching during the switching operation.

Description

Switching method and switching device for camera interface preview of smart device

Technical field

The present invention relates to the field of smart devices, and in particular, to a method and a switching device for a camera interface preview of a smart device.

Background technique

There are various types of smart devices, such as smart phones and tablet PCs, that provide users with a variety of useful functions, which leads to widespread use of smart devices. Nowadays, it is common to mount a camera module to a smart device, and therefore, the function of capturing an image (still image or moving image) using a smart device has been widely used.

The conventional method of using a preview screen provides a method of switching the preview size and the scale of the preview screen by a switching button or a switching action while viewing the preview screen displayed via the display device. In addition, since the size of the preview screen can be fixed, the preview ratio must be automatically adjusted by using different preview ratios. At the same time, when the smart device adjusts the proportion of the preview of the display screen, the preview is usually reloaded with a new preview ratio. The screen will therefore cause a switching delay.

Summary of the invention

In order to overcome the above technical deficiencies, an object of the present invention is to provide a switching method and a switching device for a camera interface preview of a smart device.

The invention discloses a method for switching a preview of a photographing interface of a smart device, wherein the switching method comprises:

Activating a camera of the smart device, displaying a first current picture of the camera in a first preview ratio on a photographing interface of the smart device;

Receiving a switching instruction for switching the first preview ratio to a second preview switching ratio;

The first current picture is cut in a display frame corresponding to the second preview ratio, and the display picture in the display frame is retained as a second current picture, and the second current picture is displayed in the picture interface.

Preferably, the camera of the smart device is activated, and the first current picture of the camera is displayed in a first preview ratio on the camera interface of the smart device, including:

When receiving the command to start the camera, calling a control device corresponding to the camera to turn on the camera;

Obtaining a first current picture of the camera;

The first current picture is stored as the first preview data in the first preview ratio;

Displaying the first current picture on a photographing interface of the smart device.

Preferably, receiving a switching instruction for switching the first preview ratio to a second preview switching ratio comprises:

Detecting a touch operation input at the photographing interface, and acquiring parameters of the touch operation;

The parameter of the touch operation includes a correspondence between at least one set of touch regions and a pressing force;

The smart device executes the switching instruction when a parameter of the touch operation matches a parameter of the switching instruction.

Preferably, the first current picture is cut in a display frame corresponding to the second preview ratio, and the display picture in the display frame is retained as a second current picture, and the second picture is displayed in the picture interface. Current picture, including:

Generating the display frame based on the second preview ratio;

Cutting the first current picture as the second current picture by using the display frame, and storing the second preview data;

Displaying the second current picture on a photographing interface of the smart device.

Preferably, the first current picture is cut in a display frame corresponding to the second preview ratio, and the display picture in the display frame is retained as a second current picture, and the second picture is displayed in the picture interface. The current picture also includes:

Obtaining a size parameter of the photographing interface of the smart device;

The display frame is adjusted within the camera interface of the smart device based on the size parameter.

The invention also discloses a switching device for previewing a camera interface of a smart device, wherein the switching device comprises: a control module, a switching module, and a preview module, wherein

The control module is configured to start a camera of the smart device, and display a first current picture of the camera in a first preview ratio on a photographing interface of the smart device;

The switching module is communicatively coupled to the control module, and configured to receive a switching instruction for switching the first preview ratio to a second preview switching ratio.

The preview module is in communication with the control module, and is configured to cut the first current picture by using a display frame corresponding to the second preview ratio, and retain the display image in the display frame as a second current picture. Displaying the second current picture in the photographing interface.

Preferably, the control module comprises:

a startup unit, configured to: when receiving the camera instruction, invoke a control device corresponding to the camera to turn on the camera;

a first picture unit, configured to be in communication with the activation unit, configured to acquire a first current picture of the camera;

a first preview unit, configured to be in communication with the first picture unit, configured to store the first current picture as the first preview data by using the first preview ratio;

The first display unit is in communication with the first preview unit, and is configured to display the first current picture on a photographing interface of the smart device.

Preferably, the switching module includes:

a touch sensing unit, configured to detect a touch operation input at the photographing interface, and acquire a parameter of the touch operation;

Touching the matching unit, and communicating with the touch sensing unit, when the parameter of the touch operation matches a parameter of the switching instruction, the smart device executes the switching instruction.

Preferably, the preview module includes:

a second picture unit, configured to generate the display frame based on the second preview ratio;

a second preview unit, configured to be in communication with the second picture unit, configured to cut the first current picture as the second current picture by using the display frame, and store the second preview data;

The second display unit is communicatively coupled to the second preview unit for displaying the second current picture on the photographing interface of the smart device.

Preferably, the preview module further includes:

a parameter configuration unit, configured to acquire a size parameter of a photographing interface of the smart device;

And a preview setting unit, configured to communicate with the parameter configuration unit, configured to adjust the display frame in a photographing interface of the smart device based on the size parameter.

After adopting the above technical solution, compared with the prior art, the following beneficial effects are obtained:

1. Different preview ratios must automatically adjust the display effect. At the same time, when the smart device adjusts the proportion of the preview of the display screen, it usually reloads the preview screen with a new preview ratio, which is pre-stored in the operating system of the smart device. The interface is viewed and stored in two preview ratios, so switching will not cause a switching delay.

DRAWINGS

1 is a schematic flow chart of a method for switching a preview of a camera interface for a smart device according to a preferred embodiment of the present invention;

2 is a flow chart showing the steps of a handover method in accordance with a preferred embodiment of the present invention;

3 is a flow chart showing the steps of a handover method in accordance with a preferred embodiment of the present invention;

4 is a flow chart showing the steps of a handover method in accordance with a preferred embodiment of the present invention;

5 is a flow chart showing the steps of a handover method in accordance with a preferred embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a switching apparatus for previewing a photographing interface of a smart device according to a preferred embodiment of the present invention.

Figure 7 is a block diagram showing the construction of a module in accordance with a preferred embodiment of the present invention.

Figure 8 is a block diagram showing the construction of a module in accordance with a preferred embodiment of the present invention.

Figure 9 is a block diagram showing the construction of a module in accordance with a preferred embodiment of the present invention.

Reference mark:

10-switching device, 20-control module, 30-switching module, 40-preview module:

Detailed ways

Advantages of the present invention are further explained below in conjunction with the accompanying drawings and specific embodiments.

Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. The following description refers to the same or similar elements in the different figures unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with aspects of the present disclosure as detailed in the appended claims.

Those skilled in the art can understand that the smart device used herein includes a device of a wireless signal receiver, a device having only a wireless signal receiver without a transmitting capability, and a device for receiving and transmitting hardware, which has the capability to A device that performs bidirectional communication reception and transmission hardware on a two-way communication link. Such devices may include cellular or other communication devices having a single line display or a multi-line display or a cellular or other communication device without a multi-line display; PCS (Personal Communications Service), which may combine voice, data Processing, fax, and/or data communication capabilities; PDA (Personal Digital Assistant), which can include radio frequency receivers, pagers, Internet/Intranet access, web browsers, notepads, Calendar and/or GPS (Global Positioning System) receiver; conventional laptop and/or palmtop computer or other device with and/or conventional laptop and/or palm type including radio frequency receiver Computer or other device. As used herein, "device", "smart device" may be portable, transportable, installed in a vehicle (aviation, sea and/or land), or adapted and/or configured to operate locally, and/or Run in any other location on the Earth and/or space in a distributed form. The "device" and "smart device" used herein may also be a communication device, an internet device, a music/video playback device, such as a PDA, a MID (Mobile Internet Device), and/or have a music/video playback. Functional mobile phones can also be smart TVs, set-top boxes and other devices.

In the description of the present invention, it is to be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship of the indications of "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the present invention and simplifying the description, rather than It is to be understood that the device or elements referred to have a particular orientation, are constructed and operated in a particular orientation and are therefore not to be construed as limiting.

It should be understood that although the terms first, second, third, etc. may be used in the present disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, the first information may also be referred to as second information without departing from the scope of the present disclosure. Similarly, the second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when" or "when" or "in response to a determination."

In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "mounted", "connected", and "connected" are to be understood broadly, and may be, for example, mechanical or electrical, or both. The internal communication of the components may be directly connected or indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms may be understood according to specific circumstances.

Referring to Figures 1-5, a flow diagram consistent with a preferred embodiment of the present invention includes:

The hardware abstraction layer (HAL) of the system runs in the user space, which shields the implementation details of the hardware driver module downwards and provides hardware access services upwards. Through the hardware abstraction layer, Android The system is supported in two layers to support hardware devices. One layer is implemented in user space, and the other layer is implemented in kernel space. A traditional Linux system fully implements hardware support in kernel space, that is, complete support for hardware. Implemented in the hardware driver module.

Why does Android have to divide the hardware support into two layers? We know that one side, the Linux kernel source code is GPL-compliant, that is, if we add or modify the code in the Linux kernel used by Android. Therefore, they must be exposed. Therefore, if the Android system is fully implemented in the hardware driver module like other Linux systems, then the hardware driver module source code must be exposed, which may damage the mobile. The benefit of the device manufacturer, as this is equivalent to exposing the hardware implementation details and parameters on the other hand. The Android source code is compliant with the Apache License protocol, which allows mobile device vendors to add or modify Android source code without having to expose the code. Therefore, if the hardware support is fully implemented in the user space of the Android system, then It is possible to hide the implementation details and parameters of the hardware. However, this is not possible, because only the kernel space has the privilege to operate the hardware device. The solution to the hardware is to implement the hardware support in the kernel space and the user space. Kernel space is still supported in the form of hardware driver modules, but it only provides a simple hardware access channel; user space is supported in the form of a hardware abstraction layer module that encapsulates the hardware implementation details and parameters. It can protect the interests of mobile device manufacturers.

Step 101: Start a camera of a smart device, display a current picture of the camera in a first preview ratio in a display area of the smart device, and store the data as first preview data;

Step 102: Receive a switching instruction that switches the first preview ratio to a second preview switching ratio.

While displaying the current picture of the camera in the display area of the smart device, storing the current picture of the camera as the first preview data in a first preview ratio;

In an embodiment of the present invention, the operation of triggering the calling of the camera may be implemented by the user through an application program, and a button may be set on the operation interface of the application, and the startup operation of the camera may be triggered by the button, or may be the application. After the program detects an external event of the calling camera, the startup operation is triggered, and the startup operation of the camera is automatically invoked, which is not limited in this embodiment of the present invention.

The camera captures the image according to the settings of the preview scale and includes a codec for compressing the captured image into a format suitable for processing by the controller of the smart device. For example, the camera can include code that can compress the image into a still image format, such as the Joint Photographic Experts Group (JPEG) format, or a video image format, such as the Moving Picture Experts Group (MPEG) format.

Therefore, the camera controller can perform control such that an image compressed to JPEG, MPEG format or the like by the above-described codec is output to the display area of the smart device. Therefore, the image captured in the exemplary embodiment of the present invention is The following image: The image captured by the user, according to the preview ratio setting selected by the user (other settings are not specifically limited in the present invention, such as the settings of the shooting (for example, resolution, aperture value, and exposure value)), compression (or Convert) an image in a format (eg, JPEG format or MPEG format) that can be processed by the controller.

At the same time, the image input through the camera is converted for previewing in the display area of the smart device and output to the display area of the smart device. For example, the camera controller performs control such that image signals input through a camera sensor or the like are converted into digital data, the converted digital data is converted into a YUV format suitable for display on a preview screen, and the converted digital data is output to the camera. Controller. The camera controller performs control so that the converted digital data is received and the converted digital data is outputted. Alternatively, the YUV format is typically configured by expressing the luminance Y component of the pixel and the chrominance U(Cb) and V(Cr) components. Since the YUV format can be transmitted with a narrower bandwidth than the normal RGB format, it is suitable to display an image for previewing an object to be captured in the display area of the smart device.

The preview scale setting is defined by the HAL layer of the operating system, and the HAL layer manages each hardware access interface in the form of a module. Each hardware module corresponds to a dynamic link library file. The commands of these dynamic link library files need to conform to certain specifications. At the same time, within the system, each hardware abstraction layer module is described by the structure hw_module_t, while the hardware device is used. The structure hw_device_t is described. Next, we describe the naming conventions of the hardware abstraction layer module files and the definitions of the structures hw_module_t and hw_device_t.

For a specific camera module, all operations on the smart device camera hardware are usually defined and set by CameraHardware, where:

mPreviewThread and mPreviewHeap are defined in CameraHardware to process the preview data related to the current picture of the camera. The preview ratio setting in the embodiment of the present invention includes a first preview ratio and a second preview ratio, which are 4:3 and 1:1, respectively.

The first thing to turn on the camera of a smart device is to preview the action of the view preview, specifically, from the interface analysis of the camera in the operating system of the smart device. All applications that have a camera function must implement a data return interface during preview, and implement three functions of surface cache creation, change, and destruction, and declare a drawing surface for the preview window. Also set the surface buffer of the camera preview. The interface of the camera that comes with the system is to set the preview area of the camera in the change method of the surface cache, so that the preview data obtained by the bottom layer is continuously delivered to the drawing surface buffer area.

After setting the above parameters, you can call the get preview method to perform the framing preview. The get preview method obtains the preview preview data by calling the cascading call layer by layer, and finally to the server of the camera.

The framework of its process camera application, the interface between the camera client and the camera server hardware abstraction layer will Process the request to preview the preview data and enter the hardware abstraction layer.

Specifically, the message of the preview is first passed to the hardware abstraction layer, and then the preview is executed and then the hardware abstraction layer is called, and the data is continuously sent to the cache of the surface buffer through the callback function, because the data of the preview data is compared. Large, so the data does not carry the upper layer, but is copied directly between the two buffers, one is the buffer for the underlying data collection, and the other is the surface buffer for display.

Preview the callback function of the preview data. Specifically, first, when the camera client and the server are successfully connected, a callback function camera is set. After the camera client and the camera server are successfully connected, a camera client is generated to return. In the constructor of the camera client, one or more callback functions can be set for the camera to return the underlying data for processing.

The captured information is separately stored in a predetermined buffer area corresponding to the camera, and at the same time, the simultaneously activated camera can obtain the preview picture data stream, and during the preview of the camera, the camera acquires the current The screen is displayed in the display area of the smart device in a first preview ratio, and the display manner may include: split screen or full screen alternate display.

Step 103: cutting the first current picture by using a display frame corresponding to the second preview ratio, retaining the display image in the display frame as a second current picture, and displaying the second in the photo interface Current picture

After receiving the switching instruction, setting a display area of the smart device in the second preview ratio;

In an embodiment of the present invention, the manner of issuing the switching instruction may be: setting a switching button on the photo preview interface in the display area of the smart device, the name of the button may be “switching preview ratio”, when starting the When the camera of the smart device previews the current screen of the camera in the display area of the smart device, the user can click the switch button to trigger the switching instruction, and at the same time, a trigger condition can be set for triggering the switching instruction, for example, by clicking Pressing the toggle button or pressing the button for a certain amount of time (at least over 2 seconds).

Optionally, the embodiment of the present invention can also trigger the switching instruction by using other buttons set on the smart device, and can also trigger by using a gesture action or the like.

Specifically, by setting the main interface layout, the button is defined,

In the operating system of the smart device, define the Intent of the application. Intent is the link between different components to communicate with each other, and encapsulates the conditions for communication between different components. An intent itself is defined as a category. An Intent object expresses a purpose or expectation, describes the service or action it expects, data related to the action, and so on.

The content provider is activated upon receiving a request for communication. The other three component activities, services, and broadcast receivers are activated by an asynchronous message called an Intent. An intent is an Intent object that holds the content of the message. For the Activity and the service, it indicates the name of the operation requested and the URI and other information of the data as the operation object. For example, it can host a request for an Activity, let it display a picture for the user, or let the user edit some text. For broadcast receivers, the Intent object indicates the behavior of the declaration. For example, it can be pressed for all objects of interest and the camera button is pressed.

The operating system is responsible for pairing according to the description of the Intent object, finding the matching component, and then passing the Intent object to the found component. In addition, Intent can be used not only for the calling of components between applications, but also for the interaction between Activity and Service inside the application. Therefore, the Intent can be used as a medium for communication between different components to provide information about the components that are called each other. It can be seen that the application can be communicated with the components related to the camera by defining the Intent of the application, and the operation of switching the preview ratio is completed. Subsequently, the corresponding Action is implemented by the IntentFilter corresponding to the defined Intent to set the second preview ratio. Finally, when the instruction to switch the preview ratio is detected, switching from the first preview ratio to the second preview ratio, specifically, setting the size of the view (SurfaceView) used by the smart device display area according to the resolution, can pass

From the first preview ratio 4:3 params.height=4*screenWidth/3;

Switch to the second preview ratio 1:1 params.height=screenWidth

surfaceView.setLayoutParams(params);

Similar code to implement.

In some cases, switching the view of the display area may cause the view to reload. At this time, you need to redefine the view using the surfaceChanged method.

Specifically, the first preview ratio is greater than the second preview ratio. After the user triggers the switching instruction, the display area displayed in the first preview ratio is cut by the display frame of the second preview scale, and then adjusted according to the size of the display area. The position of the display frame in the second preview ratio is adjusted to obtain a better visual experience. For example, the display frame of the second preview scale size is displayed centered in the display area, and the spare display area is filled with the color close to the background color of the preview screen.

Optionally, after the switching, the display area of the smart device displays the current picture of the camera of the smart device in a second preview ratio, and continues to store the current picture of the camera of the smart device at the first preview ratio, waiting for the next time. Switch.

The captured information is separately stored in a predetermined buffer area corresponding to the camera, and at the same time, the simultaneously activated camera can obtain the preview picture data stream, and during the preview of the camera, the camera acquires the current The screen is displayed in the display area of the smart device in a second preview ratio, and the display manner may include: split screen or full screen alternate display.

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

Referring to FIG. 6-9, the device according to the present invention can be implemented by a switching device 10, and includes: a control module 20, a switching module 30, and a preview module 40.

Control module 20:

The hardware abstraction layer (HAL) of the system runs in the user space, which shields the implementation details of the hardware driver module downwards and provides hardware access services upwards. Through the hardware abstraction layer, the Android system supports hardware devices in two layers, one of which is implemented in the user space, and the other layer is implemented in the kernel space. A traditional Linux system fully implements hardware support in the kernel space, that is, The hardware support is fully implemented in the hardware driver module.

Why does Android have to divide the hardware support into two layers? We know that one side, the Linux kernel source code is GPL-compliant, that is, if we add or modify the code in the Linux kernel used by Android. Therefore, they must be exposed. Therefore, if the Android system is fully implemented in the hardware driver module like other Linux systems, then the hardware driver module source code must be exposed, which may damage the mobile. The benefit of the device manufacturer, because this is equivalent to exposing the hardware implementation details and parameters on the one hand. The Android source code is compliant with the Apache License protocol, which allows mobile device vendors to add or modify Android source code without having to expose the code. Therefore, if the hardware support is fully implemented in the user space of the Android system, then It is possible to hide the implementation details and parameters of the hardware. However, this is not possible, because only the kernel space has the privilege to operate the hardware device. The solution to the hardware is to implement the hardware support in the kernel space and the user space. Kernel space is still supported in the form of hardware driver modules, but it only provides a simple hardware access channel; user space is supported in the form of a hardware abstraction layer module that encapsulates the hardware implementation details and parameters. It can protect the interests of mobile device manufacturers.

In an embodiment of the present invention, the activation unit triggers the operation of invoking the camera, which may be implemented by the user through an application program, and a button may be set on the operation interface of the application (the camera interface of the smart device), and the button is triggered by the button. The startup operation of the camera may also be triggered after the application detects an external event of calling the camera, and the startup operation of the camera is automatically invoked, and the first picture unit obtains the current picture of the camera, which is used in the embodiment of the present invention. Not limited.

The first preview unit controls the camera to capture an image according to a setting of a preview ratio (first preview ratio), and includes a codec for compressing the captured image into a format suitable for processing by a controller of the smart device, and storing, first The display unit displays the processed image on the photographing interface. For example, the camera can include code that can compress the image into a still image format, such as the Joint Photographic Experts Group (JPEG) format, or a video image format, such as the Moving Picture Experts Group (MPEG) format.

Therefore, the camera controller can perform control such that an image compressed to JPEG, MPEG format or the like by the above-described codec is output to the display area of the smart device. Therefore, the image captured in the exemplary embodiment of the present invention is an image that is set according to the preview ratio selected by the user by inputting the capture key (other settings are not specifically limited in the present invention, such as shooting settings (for example, resolution) , aperture value and exposure value)) The captured image is compressed (or converted) into an image that can be processed by the controller (for example, JPEG format or MPEG format).

Switching module: 30

The captured information is separately stored in a predetermined buffer area corresponding to the camera, and at the same time, The camera that is started at the same time obtains the preview picture data stream, and during the preview process of the camera, the current picture acquired by the camera is displayed in the display area of the smart device in the first preview ratio, and the display manner may include: split screen or full screen. Alternately displayed.

In an embodiment of the present invention, the manner of issuing the switching instruction may be: setting a switching button on the photo preview interface in the display area of the smart device, the name of the button may be “switching preview ratio”, when starting the When the camera of the smart device previews the current picture of the camera in the display area of the smart device, the touch sensing unit senses that the user clicks the switch button to trigger the switching instruction, and at the same time, the touch matching unit receives a trigger condition for triggering the switching instruction to match. To match the operation, for example, pressing the toggle button in a click manner, or pressing the button for a certain period of time (at least over 2 seconds).

Preview module 40:

Specifically, the button is defined by setting the main interface layout.

The operating system is responsible for pairing according to the description of the Intent object, finding the matching component, and then passing the Intent object to the found component. In addition, Intent can be used not only for the calling of components between applications, but also for the interaction between Activity and Service inside the application. Therefore, the Intent can be used as a medium for communication between different components to provide information about the components that are called each other. It can be seen that the application can be communicated with the components related to the camera by defining the Intent of the application, and the operation of switching the preview ratio is completed. Subsequently, the corresponding Action is implemented by the IntentFilter corresponding to the defined Intent to set the second preview ratio. Finally, when the instruction to switch the preview ratio is detected, switching from the first preview ratio to the second preview ratio For example, the size of the view (SurfaceView) used by the smart device display area is set according to the resolution, and can pass

The parameter configuration unit is configured with a ratio from the first preview of 4:3 params.height=4*screenWidth/3;

Switch to the second preview ratio 1:1 params.height=screenWidth

surfaceView.setLayoutParams(params);

Similar to the code, the second picture unit obtains the current picture of the camera through the camera of the smart device.

Specifically, the first preview ratio is greater than the second preview ratio. After the user triggers the switching instruction, the display area displayed by the first preview ratio is cut by the second preview unit in the second preview ratio display frame, according to the display. The size of the area, the preview setting unit adjusts the position of the display frame in the second preview scale, and the second display unit is displayed on the photographing interface of the smart device to obtain a better visual experience. For example, the display frame of the second preview scale size is displayed centered in the display area, and the spare display area is filled with the color close to the background color of the preview screen.

In addition, an embodiment of the present invention further provides a computer readable storage medium having stored therein computer executable instructions, such as a non-volatile memory such as an optical disk, a hard disk, or a flash memory. The above computer executable instructions are used to cause a computer or the like to perform various operations in the above-described switching method of the photographing interface preview.

Those skilled in the art will appreciate that the present invention includes apparatus related to performing one or more of the operations described herein. These devices may be specially designed and manufactured for the required purposes, or may also include known devices in a general purpose computer. These devices have computer programs stored therein that are selectively activated or reconfigured. Such computer programs may be stored in a device (eg, computer) readable medium or in any type of medium suitable for storing electronic instructions and separately coupled to a bus, including but not limited to any Type of disk (including floppy disk, hard disk, CD, CD-ROM, and magneto-optical disk), ROM (Read-Only Memory, read only memory, RAM (Random Access Memory), EPROM (Erasable Programmable Read-Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory) Programming read-only memory), flash memory, magnetic cards, or light cards. That is, a readable medium includes any medium that is stored or transmitted by a device (eg, a computer) in a readable form.

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means a specific feature described in connection with the embodiment or example. A structure, material or feature is included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms does not necessarily mean the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

It should be noted that the embodiments of the present invention are preferred embodiments, and are not intended to limit the scope of the present invention. Any one skilled in the art may use the above-disclosed technical contents to change or modify the equivalent embodiments. Any modification or equivalent changes and modifications of the above embodiments in accordance with the technical spirit of the present invention are still within the scope of the technical solutions of the present invention.

Claims

A switching method for previewing a photographing interface of a smart device, wherein the switching method comprises:

Activating a camera of the smart device, displaying a first current picture of the camera in a first preview ratio on a photographing interface of the smart device;

Receiving a switching instruction for switching the first preview ratio to a second preview switching ratio;

The first current picture is cut in a display frame corresponding to the second preview ratio, and the display picture in the display frame is retained as a second current picture, and the second current picture is displayed in the picture interface.
The switching method of claim 1, wherein the camera of the smart device is activated, and the first current picture of the camera is displayed in a first preview ratio on the camera interface of the smart device, including:

When receiving the command to start the camera, calling a control device corresponding to the camera to turn on the camera;

Obtaining a first current picture of the camera;

The first current picture is stored as the first preview data in the first preview ratio;

Displaying the first current picture on a photographing interface of the smart device.
The switching method according to claim 1, wherein receiving a switching instruction for switching the first preview ratio to a second preview switching ratio comprises:

Receiving a touch operation input at the photographing interface, and acquiring parameters of the touch operation;

The parameter of the touch operation includes a correspondence between at least one set of touch regions and a pressing force;

The smart device executes the switching instruction when a parameter of the touch operation matches a parameter of the switching instruction.
The switching method according to claim 1, wherein the first current picture is cut by a display frame corresponding to the second preview ratio, and the display picture in the display frame is retained as a second current picture. Displaying the second current picture in the photographing interface, including:

Generating the display frame based on the second preview ratio;

Cutting the first current picture as the second current picture by using the display frame, and storing the second preview data;

Displaying the second current picture on a photographing interface of the smart device.
The switching method according to claim 1, wherein a display frame corresponding to the second preview ratio is cut The first current picture is cut, the display screen in the display frame is reserved as a second current picture, and the second current picture is displayed in the photo interface, and further includes:

Obtaining a size parameter of the photographing interface of the smart device;

The display frame is adjusted within the camera interface of the smart device based on the size parameter.
A switching device for previewing a photographing interface of a smart device, wherein the switching device comprises: a control module, a switching module, and a preview module, wherein

The control module is configured to start a camera of the smart device, and display a first current picture of the camera in a first preview ratio on a photographing interface of the smart device;

The switching module is communicatively coupled to the control module, and configured to receive a switching instruction for switching the first preview ratio to a second preview switching ratio.

The preview module is in communication with the control module, and is configured to cut the first current picture by using a display frame corresponding to the second preview ratio, and retain the display image in the display frame as a second current picture. Displaying the second current picture in the photographing interface.
The switching device of claim 6, wherein the control module comprises:

a startup unit, configured to: when receiving the camera instruction, invoke a control device corresponding to the camera to turn on the camera;

a first picture unit, configured to be in communication with the activation unit, configured to acquire a first current picture of the camera;

a first preview unit, configured to be in communication with the first picture unit, configured to store the first current picture as the first preview data by using the first preview ratio;

The first display unit is in communication with the first preview unit, and is configured to display the first current picture on a photographing interface of the smart device.
The switching device of claim 6, wherein the switching module comprises:

a touch sensing unit, configured to detect a touch operation input at the photographing interface, and acquire a parameter of the touch operation;

The parameter of the touch operation includes a correspondence between at least one set of touch regions and a pressing force;

Touching the matching unit, and communicating with the touch sensing unit, when the parameter of the touch operation matches a parameter of the switching instruction, the smart device executes the switching instruction.
The switching device of claim 6, wherein the preview module comprises:

a second picture unit, configured to generate the display frame based on the second preview ratio;

a second preview unit, communicatively coupled to the second picture unit, for cutting the first time through the display frame The front picture is used as the second current picture, and is stored as the second preview data;

The second display unit is communicatively coupled to the second preview unit for displaying the second current picture on the photographing interface of the smart device.
The switching device of claim 6, wherein the preview module further comprises:

a parameter configuration unit, configured to acquire a size parameter of a photographing interface of the smart device;

And a preview setting unit, configured to communicate with the parameter configuration unit, configured to adjust the display frame in a photographing interface of the smart device based on the size parameter.