WO2019056242A1

WO2019056242A1 - Camera photographing parameter setting method for smart terminal, setting device, and smart terminal

Info

Publication number: WO2019056242A1
Application number: PCT/CN2017/102592
Authority: WO
Inventors: 张学熙
Original assignee: 深圳传音通讯有限公司
Priority date: 2017-09-21
Filing date: 2017-09-21
Publication date: 2019-03-28

Abstract

A camera parameter setting method for a smart terminal, a setting device, and the smart terminal. A hardware abstraction layer receives a preview instruction or a photographing instruction issued by a camera application layer, and the camera application layer enables a camera enhancement function, then, the hardware abstraction layer calls a parameter setting function in a preview data control channel module to create one photographing parameter setting interface, the photographing parameter setting interface transmits one enhancement function enabling signal to a parameter management module in an image signal processing module in a camera hardware layer, the parameter management module adjusts and modifies a photographing parameter corresponding to the camera enhancement function on the basis of the enhancement function enabling signal, thus acquiring the optimal preview and photographing effects. The present invention adjusts the photographing parameter with respect to different photographing functions and displays in real-time during a preview process the effects when the parameter is adjusted, thus increasing photographing effects and enhancing user experience.

Description

Camera shooting parameter setting method, setting device and intelligent terminal of intelligent terminal

Technical field

The invention relates to a camera shooting parameter setting method, a setting device and an intelligent terminal of an intelligent terminal.

Background technique

As people's living standards continue to improve, recording every moment of life has become an important part of people's lives, and an indispensable part of life. Photographing is also a handprint of civilization. Photography is the crystallization of the natural convergence between natural science and social science. It is a visual means of understanding, understanding and reflecting social reality. It is an art form with aesthetic value and a perfect combination of science and art. Through the conception of the picture, the balance of the tones, and the tailoring of the scene, the photographer brings beautiful enjoyment to the viewer, so that the viewer truly gets the satisfaction of the soul. At the same time, through the understanding of photographic equipment, we can reach out to all areas of modern science, broaden the scope of knowledge, and improve artistic accomplishment. Therefore, photography is not just about playing with the camera, but a comprehensive process that includes applied science, imagination and design, professional skills and organizational skills.

In recent years, with the development of technology, mobile terminals such as mobile phones and tablet computers (PADs) with shooting functions have been widely used, and electronic mobile terminals such as digital cameras, smart phones, and tablet computers generally have camera functions, which satisfy people. The need to shoot anytime, anywhere. At the same time, people have higher and higher requirements for the quality of pictures taken by mobile terminals, and it is expected to take high-definition pictures through mobile terminals.

The camera is one of the basic applications in the smart phone. It is not only convenient and quick to take pictures with the smart phone camera, but also the image quality of the smart phone camera is better. At present, whether it is an android phone or a hot ios phone, its camera camera function is very important in the mobile phone, and it is also the most attractive place for customers. Nowadays, a variety of mobile phone applications are emerging one after another. The smart phone app for taking photos is even more fascinating. The most famous ones are such as the US. These third-party applications are based on the three modes of preview, photo and video of the camera itself. Third-party camera functions such as eye pattern recognition, night shot lighting, panorama, and beauty have greatly satisfied the needs of users. Since These third-party applications must be implemented based on the camera application that comes with the smart terminal itself. Inspired by this, the camera functions of the smart terminal have also developed a number of enhancements, such as panorama, beauty, night shot, etc. It can also fully meet the needs of users, and since it can directly enter the camera function when the mobile terminal locks the screen, it is more convenient to use the camera function that comes with the mobile terminal than to use the third-party camera application.

As shown in Figure 1, it is the camera shooting parameter setting method of the camera function that comes with the smart terminal:

1. The camera application layer issues a preview instruction or a take picture, and the preview instruction is transmitted to the hardware abstraction layer through the camera frame layer and the camera server module;

2. The image management module of the image signal processing module uses the default camera parameters;

3. The hardware abstraction layer calls the camera hardware layer through the camera driver layer to acquire image data according to the currently set camera parameters, and the hardware abstraction layer transmits the preview image to the camera application layer through the preview server data channel module through the preview data control channel module. display.

It can be seen that the current mainstream camera shooting parameter setting is to solidify the entire calibration scheme into the system layer of the device after the parameters of the camera shooting are completed in the system development environment. It is impossible to re-edit the camera shooting parameters that have been solidified in this way. If you need to modify the camera shooting parameters, you need to re-create the device system firmware, which leads to the inconvenience of system development, debugging, and optimization, which affects the camera calibration. effectiveness. At the same time, the inflexible camera shooting parameter modification method will also affect the use and upgrade experience of the camera itself. In addition, in the specific user application scenario, the general camera calibration scheme may not achieve a good shooting effect, and the camera provided by the smart terminal may not be able to achieve a good shooting effect. The camera preview and camera effect parameters used by these enhancements in the function are the same as the camera preview and camera effect parameters of the basic camera function, which results in the optimal preview of the camera preview and camera effect of the basic camera function. The effect of the enhanced function may not be optimal, so that the effect of the enhanced function is limited, and the maximum display cannot be performed, which affects the photographing effect and reduces the user experience.

Disclosure of invention

The invention provides an imaging parameter setting method, a setting device and an intelligent terminal of an intelligent terminal, which adjusts the imaging parameters for different imaging functions, and displays the effect of the parameter adjustment in real time during the previewing process, thereby improving the shooting effect. Improved user experience.

In order to achieve the above object, the present invention provides a method for setting an imaging parameter of a smart terminal, which comprises the following steps:

The hardware abstraction layer receives the preview instruction or the shooting instruction issued by the camera application layer, and the camera application layer turns on the camera enhancement function, and the hardware abstraction layer calls the parameter setting function in the preview data control channel module to create a camera parameter setting interface, the camera parameter. The setting interface transmits an enhanced function enable signal to the parameter management module in the image signal processing module in the camera hardware layer, and the parameter management module adjusts and modifies the camera parameter corresponding to the camera enhancement function according to the enhanced function enable signal, Get the best preview and shooting results.

The hardware abstraction layer receives a preview command or a shooting instruction issued by the camera application layer, and the camera application layer does not turn on the camera enhancement function, and the parameter management module in the image signal processing module in the camera hardware layer uses the default camera parameters for previewing and shooting. .

The camera enhancement functions include, but are not limited to, the following functions: night shot, panorama, and beauty.

Different camera enhancements correspond to different enable signals.

The camera parameter setting interface is configured to set and acquire an automatic exposure parameter, an auto focus parameter, and an automatic white balance parameter.

The imaging parameters include, but are not limited to, automatic exposure parameters, auto focus parameters, auto white balance parameters, sensitivity parameters, aperture parameters, shutter parameters, exposure parameters, contrast parameters, saturation parameters, brightness noise reduction parameters, color Noise reduction parameters.

The invention also provides an imaging parameter setting device of the intelligent terminal, comprising:

a camera application layer for transmitting a preview instruction or a shooting instruction, and displaying a preview image and a captured image;

a camera frame layer for providing an application interface to a camera application layer;

a Binder inter-process communication module for providing a communication interface between a camera framework layer and a camera server module;

a camera server module for providing a camera hardware layer operation interface;

a hardware abstraction layer having a camera parameter setting interface for transmitting a camera enhancement function enable signal;

a camera driver layer for driving a camera hardware layer;

a camera hardware layer, the image signal processing module in the camera hardware layer has a parameter management module for adjusting and modifying the corresponding camera enhancement function according to the camera enhancement function enable signal Like parameters.

The invention also provides an intelligent terminal, which comprises the camera parameter setting device.

The invention adjusts the camera parameters for different camera functions, and displays the effect of the parameter adjustment in real time during the preview process, thereby improving the shooting effect and improving the user experience.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a flowchart of a method for setting an imaging parameter of a camera function provided on a smart terminal in the background art.

2 is a schematic structural view of a camera system.

FIG. 3 is a flowchart of a method for setting an imaging parameter of a smart terminal according to the present invention.

FIG. 4 is a schematic structural diagram of an imaging parameter setting apparatus of a smart terminal according to the present invention.

The best way to implement the invention

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be specifically described with reference to Figs. 2 to 4 .

Taking the Android system as an example, the camera system adopts the C/S mode. In the camera system, only two processes exist, that is, the client and the server, and the client and the server communicate between the Binder processes.

As shown in FIG. 2, the camera system includes a camera application layer, a camera frame layer, a Binder interprocess communication module, a camera server module, a hardware abstraction layer, a camera driver layer, and a camera hardware layer. The client includes a camera application layer and a camera framework layer, and the server includes a camera server module and a hardware abstraction layer. The code of the camera frame layer is run on the client side, and the code of the camera server module and the interface of the hardware abstraction layer HAL include the implementation code running on the server side. And from the server, you can also know that the camera service is not a separate process, but a module in the Media Server process.

The camera framework layer is used to provide a basic camera function implementation for application development, and generally provides an interface in the form of a standard Android SDK. Since the camera system framework is entirely in C/S mode, this layer acts as a client. As a camera client, all that must be done is to communicate with the server. The way of this communication is not fixed. The specific version depends on the version released by Android, but in general it is Binder interprocess communication. The camera framework layer includes the Camera API (Application Programming Interface), which can Provides an effective application development interface for camera development, packaging operations on camera devices, enabling communication with camera modules for a simple camera client.

The Binder interprocess communication module is a channel for implementing the camera client and the server. The channel between them is bidirectional. The client uses this module to call the server function. The server also uses this module to complete the notification to the client. The responsibility of the Binder interprocess communication module is to provide the required programming interfaces to both ends by using the interprocess communication mechanism. His function is to realize the camera function call across processes, which is a bridge to realize the C/S mode of the camera system.

The camera server module is a module that manages and uses camera functions. The camera server module is a background service that is hosted in the Media Server process and provides an interface for the client to operate the camera. Since the characteristics of the camera are exclusive hardware devices, the real owner of the camera should be the server rather than the client. The client can only operate the camera device through the server. Parameters and other information should be saved on the server. Since the characteristics of the server are to allow multiple clients to be connected at the same time, whether the specific server can support the specific implementation, and whether the detailed features of multiple cameras can be used at the same time depends on the specific implementation. The definition of the camera server module is just the ability to manage the camera and provide camera operations for the client. This capability will vary depending on the version released by Android. Developers can modify the capabilities of the server as needed, but the strength of the changes must comply with Google's compatibility definitions and ensure the passage of CTS. For example, the ability of the server must ensure that the same camera device cannot be opened by multiple clients. In summary, there are at least two functions: 1. Manage the camera device in the form of a service, and provide the client with the ability to query the camera, for example, how many camera modules are under the current service. 2. Open the camera, provide a proxy for the operation of the camera module, and directly operate the hardware module by accessing the hardware interface.

The hardware abstraction layer (HAL) is the underlying system, which can encapsulate the operation interface of the hardware device camera of the system, provide an interface upward, and shield the implementation details of the underlying layer. The hardware abstraction layer completely separates the system software from the hardware, which makes the system's device driver independent of the hardware device, thus greatly improving the system's portability. From the perspective of hardware and software testing, the testing of hardware and software can be done separately based on the hardware abstraction layer, making parallel testing of software and hardware possible. In the definition of the abstraction layer, it is necessary to specify a unified hardware and software interface standard. The design work needs to be done based on the system requirements. The code work can be completed by personnel who are familiar with the hardware. The abstraction layer should generally contain the initialization of the relevant hardware, the input of the data / Output operations, configuration operations of hardware devices, and other functions.

The camera hardware layer is a camera module CCM (Camera Compact Module), and the CCM includes a lens group (Lens), a camera sensor (Camera sensor), an image signal processing module ISP (Image Signal Processing), a soft board (FPC), and an image processing chip ( DSP). The lens is the soul of the camera. The lens plays an important role in the imaging effect. Using the refraction principle of the lens, the scene light passes through the lens to form a clear image on the focal plane. The sensor is the core module of CCM, and there are two widely used ones: one is a CCD charge-coupled original and the other is a CMOS complementary metal-oxide-semiconductor device. Image Signal Processing Module (ISP) is mainly responsible for processing preview data, controlling exposure parameters (3A), with several buffers, pre-processing, preview enhancement ( Preview enhancement), post-processing, etc. The main function of the image signal processing module ISP is to post-process the signal output from the front-end sensor. The main functions include linear correction, noise removal, dead point removal, interpolation, white balance, automatic exposure control, etc., depending on the ISP to be in different optics. Under the conditions, the scene details can be better restored, and the ISP technology largely determines the imaging quality of the camera. It is divided into two forms, independent and integrated. Under normal circumstances, a mobile phone equipped with a separate ISP has a greater advantage in image processing, and with the increase of the pixel of the mobile phone camera, high-speed continuous shooting, full HD or even 4K recording, the processing performance requirements of the mobile phone to the ISP are coming. The higher. Many manufacturers with the main shooting function have added independent ISPs to their mobile phones. For example, Meizu MX3 has adopted Fujitsu's four-channel ISP. The official claims that its transmission speed has doubled, and it can perfectly achieve 25 continuous shots per second, making it excellent. The image processing capability and comprehensive shooting performance have been greatly improved compared to the MX2. The MeituKiss mobile phone, featuring the self-timer function, is the first to have a separate ISP chip for the front camera worldwide. This high-end chip from Fujitsu has outstanding noise and color reproduction capabilities, and is widely used in professional fields such as digital cameras. FPC flexible circuit board, also known as flexible circuit board, is used to connect chips and mobile phones for electrical signal transmission. The image processing chip DSP is an important part of CCM. It converts the data obtained by the photosensitive sensor into standard GRB, YUV and other image signals, and transmits them to the central processor and refreshes the sensor in time.

Take the Android system as an example to illustrate the camera photographing process: In the Android system, when running the camera application, as shown in Figure 2, the camera application layer, camera frame layer, camera server module, hardware abstraction layer, camera driver layer and camera are generally required. Interact between hardware layers.

When the user takes a photo through the mobile terminal, the camera application layer issues a corresponding shooting instruction (take The picture command) is transmitted to the hardware abstraction layer via the camera frame layer and the camera server module. When the hardware abstraction layer receives the shooting instruction, the camera module is called to take a photo, and the camera driver layer saves the image data collected by the camera module.

The hardware abstraction layer of the mobile terminal acquires image data collected by the camera module from the camera driver layer, and transmits the image data to the camera application layer via the camera server module and the camera frame layer, and the camera application layer generates the image data according to the image data. And display the corresponding picture.

Before discussing the exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as a process or method depicted as a flowchart. Although the flowcharts describe the various steps as a sequential process, many of the steps can be implemented in parallel, concurrently or concurrently. In addition, the order of the steps can be rearranged. The process may be terminated when its steps are completed, but may also have additional steps not included in the figures. The processing may correspond to methods, functions, procedures, subroutines, subroutines, and the like.

When using the camera function of the mobile terminal, in order to maximize the enhancements and achieve better shooting results, it is necessary to make the parameter settings of the enhanced function be adjusted independently, instead of simply using The same basic parameter settings as the camera.

Based on this, the present invention provides a method for setting an imaging parameter of a smart terminal. When the hardware abstraction layer receives a preview instruction or a shooting instruction issued by the camera application layer, and the camera application layer turns on the camera enhancement function, the hardware abstraction layer calls the preview data. The parameter setting function in the control channel module creates a camera parameter setting interface, and the camera parameter setting interface transmits an enhanced function enable signal to the parameter management module in the image signal processing module in the camera hardware layer, and the parameter management module makes the enhanced function according to the enhanced function. The signal can adjust and modify the camera parameters corresponding to the camera enhancement function to obtain the best preview and shooting effect; and when the hardware abstraction layer receives the preview command or shooting instruction issued by the camera application layer, and the camera application layer is not turned on. With the camera enhancement function, the parameter management module in the image signal processing module in the camera hardware layer uses the default camera parameters for previewing and shooting.

As shown in FIG. 3, the present invention provides a method for setting an imaging parameter of an intelligent terminal, which specifically includes the following steps:

Step S1: The camera application layer issues a preview instruction or a take picture, and the preview instruction or the shooting instruction is transmitted to the hardware abstraction layer through the camera frame layer and the camera server module;

Step S2, the hardware abstraction layer calls the parameter setting function in the preview data control channel module to create a camera parameter setting interface;

Step S3, the camera server module determines whether the camera application layer has selected the camera enhancement function, and if so, proceeds to step S4, and if not, proceeds to step S7;

Step S4, the camera parameter setting interface transmits an enable signal to the parameter management module in the image signal processing module ISP in the camera hardware layer, the enable signal indicates that its corresponding camera enhancement function has been enabled, proceed to step S5;

Step S5, the parameter management module determines whether an enable signal is received, and if so, proceeds to step S6, and if not, proceeds to step S7;

Step S6, the parameter management module determines the enabled camera enhancement function according to the enable signal, and adjusts and modifies the camera parameters corresponding to the camera enhancement function to obtain an optimal preview effect, and proceeds to step S8;

Step S7, the parameter management module uses the default camera parameters, step S8;

Step S8, the hardware abstraction layer calls the camera hardware layer through the camera driver layer to acquire image data according to the currently set camera parameters, and the hardware abstraction layer transmits the preview image to the camera application layer through the camera server module and the camera frame layer through the preview data control channel module. Display.

The camera parameter setting interface is used to set and acquire auto exposure parameters (Auto Exposure), auto focus parameters (Auto Focus), and auto white balance parameters (Auto White Balance).

Exposure is a physical quantity used to calculate the amount of light that reaches the camera from the scene. Using a camera to capture the lens CCD/CMOS is the only way to get a high-quality photo. Overexposed, the photo looks too bright, underexposed, and the photo looks too dark. In the camera, the shutter speed and aperture value can be controlled electronically or mechanically. In addition, in addition to the shutter speed and aperture value, you can control the exposure by changing the sensitivity of the camera.

With autofocus, the camera captures more detail in the photo. Autofocus is one of the key technologies in imaging systems and has a wide range of uses in camera imaging systems. Conventional autofocus technology mostly uses the ranging method, that is, by measuring the object distance, and determining the image distance or focal length of the system by the lens equation to adjust the system to be in an accurate focus state. With the development of modern computing technology and the growing maturity of digital image processing theory, autofocus technology has entered a new digital age. More and more autofocus methods are based on image processing theory to analyze and calculate image related information, and then according to the control strategy. Drive the motor and adjust the system to focus accurately.

In the process of color image acquisition, the color of the acquired images is different under different illuminations. Therefore, a suitable color correction algorithm is sought to transform the color images obtained under non-standard illumination conditions into the color images under standard illumination. Handling a digital image with white balance and color correction ensures its color fidelity. Digital cameras rely on a series of light detectors with color filters to detect and capture images. It is impossible to be more accurate than the human eye. Therefore, it is necessary to perform some necessary processing and correction on the images to ensure that the final images are reproduced as faithfully as possible. The color of the scene.

The camera enhancement functions include, but are not limited to, the following functions: night shot, panorama, beauty, and the like.

The enable signals respectively correspond to different camera enhancement functions, for example, the night shot function corresponds to the night shot enable signal, the panorama function corresponds to the panorama enable signal, the beauty function corresponds to the beauty enable signal, and the like.

The imaging parameters include: automatic exposure parameter, auto focus parameter, auto white balance parameter, sensitivity parameter (ISO), aperture parameter, shutter parameter, exposure parameter, contrast parameter, saturation parameter, brightness noise reduction parameter (ANR) ), color noise reduction parameters (CCR) and so on.

In one embodiment of the present invention, the camera system is based on the MT6797 platform, the camera application layer issues a preview instruction, the preview instruction is transmitted to the hardware abstraction layer through the camera frame layer and the camera server module, and the hardware abstraction layer calls the preview data control channel. The parameter setting function setParameters in the module FlowControl creates a camera parameter setting interface IHal3A, the camera server module determines that the camera application layer selects the camera enhancement function, and the camera parameter setting interface IHal3A manages the parameters in the image signal processing module ISP in the camera hardware layer. The module IspTuningCustom transmits an enable signal, the parameter management module IspTuningCustom determines the enabled camera enhancement function according to the enable signal, and adjusts and modifies the camera parameters corresponding to the camera enhancement function, and the hardware abstraction layer calls the camera hardware layer through the camera driver layer. The image data is acquired according to the currently set camera parameters, and the hardware abstraction layer transmits the preview image to the camera application layer through the preview server control channel module to the camera application layer for display.

In one embodiment of the present invention, the camera application layer issues a preview or take picture, and the preview instruction or shooting instruction is transmitted to the hardware abstraction layer through the camera frame layer and the camera server module, and the camera application layer If the camera enhancement function is not selected, the parameter management module in the image signal processing module ISP in the camera hardware layer uses the default camera parameters, and the hardware abstraction layer calls the camera hardware layer through the camera driver layer to acquire image data according to the currently set camera parameters, hardware. The abstraction layer displays the preview image through the preview data control channel module to the camera application layer through the camera server module and camera frame layer for display.

In another embodiment of the present invention, the camera application layer issues a preview or take picture, and the preview instruction or shooting instruction is transmitted to the hardware abstraction layer through the camera frame layer and the camera server module, and the camera service The end module determines that the camera application layer selects the night shot function, and the hardware abstraction layer calls the parameter setting function in the preview data control channel module to create a camera parameter setting interface, and the camera parameter setting interface is directed to the image signal processing module ISP in the camera hardware layer. The parameter management module transmits a night shot enable signal indicating that the corresponding camera night shot function has been enabled, and the parameter management module adjusts and modifies the camera parameters corresponding to the camera night shot function to obtain the best Preview effect, the hardware abstraction layer calls the camera hardware layer through the camera driver layer to obtain image data according to the currently set camera parameters, and the hardware abstraction layer transmits the preview image to the camera application layer through the preview server data channel module through the preview data control channel module. Display.

With the richness of people's living standards, the activities are also colorful, the night lights of the city, the gorgeous fireworks in the amusement park, the laughter at night parties, these are the memories people want to leave, the color of various light sources The beautiful night scene is attractive as a subject, but unlike daytime shooting, night photography requires unique skills. Assuming the night shot enhancement is selected in the camera application layer, the parameter management module receives a night shot enable signal. The parameter management module adjusts and modifies the camera parameters involved in the night shot enhancement function. For night scenes, it is usually necessary to pay attention to the following:

1. Use the manual exposure mode: first measure the aperture value and sensitivity with the aperture priority mode. For example, use f/8, ISO200, and the shutter speed given by the camera is 2 seconds. Then go to manual exposure mode, set the aperture to f/8, ISO 200 sensitivity, shutter speed 2 seconds, and take a test shot. Check the effect of the shot, and refer to the histogram to set the exposure parameters when necessary. If you feel the overall darkness, you will usually choose to extend the exposure time without increasing the aperture or increasing the sensitivity. This is because the camera is already mounted on a tripod. Modifying the shutter speed only affects the cumulative amount of light. If the aperture is increased, the depth of field will be lighter. Increasing the sensitivity will cause noise problems.

2, modify the white balance: modify the white balance is to change the color of the photo. Shooting night scenes doesn't have to use automatic white balance. Many times you can change the white balance to make your photos look different. A cold white balance will make the city look like a science fiction, while a warm white balance will make the city look bustling. So you can try different white balance settings in the same scene.

3, shooting with different aperture: shooting night scenes do not have to use a small aperture to shoot. Although a small aperture (such as f/8) will make the depth of field deeper, sometimes we can also use a large aperture to shoot night scenes, for example The following two situations: hand-held shooting, handheld shooting has a "safe shutter" limit, if the shutter is too slow, it is easy to appear picture jitter, then increase the aperture, increase the sensitivity when needed; use shallow depth of field effect to highlight details, composition Don't be the same, shooting night scenes in addition to shooting "big scene", using shallow depth of field effect to highlight the details can also take good pictures, then we can use a large aperture to create a shallow depth of field, Christmas lights is a good example .

4, slow shutter: slow shutter is the same very fun and useful shooting skills. Shooting at slow shutter speeds at night allows you to shoot beautiful tracks, star tracks, light paintings, and even some light that is invisible to the naked eye.

When the night shot enhancement function is activated, the adjustment and setting of the camera parameters usually require setting the sensitivity higher and increasing the exposure time. After the camera's ISP obtains the current camera environment parameter, the target scene of the current photographing environment is determined. By default, the camera's current camera parameters are set using the parameter configuration initial value corresponding to the target scene, such as locking the sensitivity to ISO6000 (ISO). Indicates the sensitivity, ISO6000 means the sensitivity value is 6000), close the OIS (Optical Image Stabilizer) while pulling the shutter, adjust the exposure time to find a reasonable amount of light to complete the photo, but the user deletes all the photos At this time, it is determined that the camera is abnormal in shooting, and the current camera parameters of the camera are adjusted based on the setting parameter adjustment strategy, such as reducing the sensitivity to ISO2000 (ISO indicates sensitivity, ISO2000 indicates sensitivity value is 2000), while increasing the exposure time, continue to take pictures.

In another embodiment of the present invention, the camera application layer issues a preview or take picture, and the preview instruction or shooting instruction is transmitted to the hardware abstraction layer through the camera frame layer and the camera server module, and the camera service The end module determines that the camera application layer selects the beauty function, and the hardware abstraction layer calls the parameter setting function in the preview data control channel module to create a camera parameter setting interface, and the camera parameter setting interface to the image signal processing module ISP in the camera hardware layer The parameter management module transmits a beauty enable signal indicating that the corresponding camera beauty function has been enabled, and the parameter management module adjusts and modifies the camera parameters corresponding to the camera beauty function to obtain the best Preview effect, the hardware abstraction layer calls the camera hardware layer through the camera driver layer to obtain image data according to the currently set camera parameters, and the hardware abstraction layer transmits the preview image to the camera application layer through the preview server data channel module through the preview data control channel module. Display.

Today's users, especially female users, often like to make some modifications to the photos they take. Covering facial defects such as acne, freckles, dark yellow skin, etc., which can improve some self-confidence. Assuming that the beauty enhancement function is selected in the camera application layer, the parameter management module receives a beauty enable signal. The parameter management module adjusts and modifies the camera parameters involved in the beauty enhancement function, usually for exposure, contrast, saturation, sharpening, highlights, shadows, color temperature, hue, vignetting, grain, shadow tones, highlights Adjust the parameters.

As shown in FIG. 4, the present invention further provides an imaging parameter setting device for an intelligent terminal, comprising:

a camera application layer 1, which is used to send a preview instruction or a shooting instruction, and display a preview image and a captured image;

a camera frame layer 2 for providing an application interface to a camera application layer;

a Binder inter-process communication module 3, configured to provide a communication interface between a camera framework layer and a camera server module;

a camera server module 4 for providing a camera hardware layer operation interface;

a hardware abstraction layer 5 having a camera parameter setting interface 501 for transmitting a camera enhancement function enable signal;

a camera driver layer 6 for driving a camera hardware layer;

The camera hardware layer 7 has a parameter management module 7011 in the image signal processing module 701 for adjusting and modifying the camera parameters of the corresponding camera enhancement function according to the camera enhancement function enable signal.

The present invention also provides an intelligent terminal, which can provide a shooting function, the intelligent terminal includes an imaging parameter setting device, and the imaging parameter setting device further includes:

a camera driver layer for driving a camera hardware layer;

a camera hardware layer having a parameter management module in an image signal processing module in the camera hardware layer A block for adjusting and modifying the camera parameters of the corresponding camera enhancement function according to the camera enhancement function enable signal.

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

Finally, it should also be noted that in this context, relational terms such as first and second are used merely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these entities. There is any such actual relationship or order between operations. Furthermore, the terms "comprises" or "comprising" or "comprising" or any other variations are intended to encompass a non-exclusive inclusion, such that a process, method, article, or terminal device that includes a plurality of elements includes not only those elements but also Other elements that are included, or include elements inherent to such a process, method, article, or terminal device. An element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or terminal device that comprises the element, without further limitation.

Although the present invention has been described in detail by the preferred embodiments thereof, it should be understood that the foregoing description should not be construed as limiting. Various modifications and alterations of the present invention will be apparent to those skilled in the art. Therefore, the scope of the invention should be defined by the appended claims.

Claims

A camera parameter setting method for an intelligent terminal, characterized in that the method comprises the following steps:

The hardware abstraction layer receives the preview instruction or the shooting instruction issued by the camera application layer, and the camera application layer turns on the camera enhancement function, and the hardware abstraction layer calls the parameter setting function in the preview data control channel module to create a camera parameter setting interface, the camera parameter. The setting interface transmits an enhanced function enable signal to the parameter management module in the image signal processing module in the camera hardware layer, and the parameter management module adjusts and modifies the camera parameter corresponding to the camera enhancement function according to the enhanced function enable signal, Get the best preview and shooting results.
The camera parameter setting method of the smart terminal according to claim 1, wherein the hardware abstraction layer receives a preview instruction or a shooting instruction issued by the camera application layer, and the camera application layer does not enable the camera enhancement function, and the camera hardware layer The parameter management module in the image signal processing module uses the default camera parameters for previewing and shooting.
The camera parameter setting method of the smart terminal according to claim 1, wherein the camera enhancement function includes but is not limited to the following functions: night shot, panorama, and beauty.
The imaging parameter setting method of the smart terminal according to claim 3, wherein the different camera enhancement functions respectively correspond to different enable signals.
The imaging parameter setting method of the intelligent terminal according to claim 1, wherein the imaging parameter setting interface is configured to set and acquire an automatic exposure parameter, an auto focus parameter, and an automatic white balance parameter.
The imaging parameter setting method of the intelligent terminal according to claim 1, wherein the imaging parameters include, but are not limited to, an automatic exposure parameter, an auto focus parameter, an automatic white balance parameter, a sensitivity parameter, an aperture parameter, and a shutter. Parameters, exposure parameters, contrast parameters, saturation parameters, brightness noise reduction parameters, color noise reduction parameters.
An imaging parameter setting device for an intelligent terminal, comprising:

a camera application layer for transmitting a preview instruction or a shooting instruction, and displaying a preview image and a captured image;

a camera frame layer for providing an application interface to a camera application layer;

Binder interprocess communication module, which is used to provide a camera frame layer and a camera server module Communication interface

a camera server module for providing a camera hardware layer operation interface;

a hardware abstraction layer having a camera parameter setting interface for transmitting a camera enhancement function enable signal;

a camera driver layer for driving a camera hardware layer;

In the camera hardware layer, the image signal processing module in the camera hardware layer has a parameter management module for adjusting and modifying the camera parameters of the corresponding camera enhancement function according to the camera enhancement function enable signal.
An intelligent terminal comprising the imaging parameter setting device according to claim 1.