WO2017177693A1 - 一种摄像头启动时亮度的控制方法、系统及摄像终端 - Google Patents
一种摄像头启动时亮度的控制方法、系统及摄像终端 Download PDFInfo
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- WO2017177693A1 WO2017177693A1 PCT/CN2016/108353 CN2016108353W WO2017177693A1 WO 2017177693 A1 WO2017177693 A1 WO 2017177693A1 CN 2016108353 W CN2016108353 W CN 2016108353W WO 2017177693 A1 WO2017177693 A1 WO 2017177693A1
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- brightness
- camera
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- exposure
- environment
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/71—Circuitry for evaluating the brightness variation
Definitions
- the present invention relates to the field of terminal display control technologies, and in particular, to a method, a system and a camera terminal for controlling brightness of a camera when it is activated.
- the camera is an important part of smart terminal devices. How to capture high-quality images is the main technical indicator of camera application.
- the exposure generated when the camera is just started is insufficient or the exposure is excessive, and a low-quality image is generated, and the user experience is poor.
- the invention provides a method, a system and a camera terminal for controlling brightness when a camera is started, which overcomes the problem that the exposure of the camera in the startup process is insufficient or the exposure is excessive, and a low-quality camera picture is generated. Experience poor technical issues.
- Embodiments of the present invention provide a method for controlling brightness of a camera when it is started, which includes:
- the control camera When receiving the instruction to start the camera, the control camera performs the on-delay according to the predetermined time, and simultaneously acquires the brightness value of the environment in which the current camera terminal is located, and transmits the brightness value to the central processing unit;
- the central processor compares the brightness value with a preset brightness threshold, determines whether the current environment state of the current camera terminal is indoor, outdoor or dark, and selects a corresponding initial exposure value according to the determination result;
- Camera initialization is performed based on the selected exposure initial value.
- the method further includes:
- the two preset brightness thresholds are set in advance, and the two preset brightness thresholds are: a preset brightness upper limit threshold and a preset brightness lower limit threshold, wherein the preset brightness upper limit threshold is greater than the preset brightness lower limit threshold. .
- the central processing unit compares the brightness value with a preset brightness threshold, and determines whether the current environment state of the camera terminal is indoor, outdoor or dark, including:
- the central processing unit compares the brightness value with a preset brightness threshold, and determines whether the current environment state of the camera terminal is indoor, outdoor or dark, including:
- the central processing unit compares the brightness value with a preset brightness threshold, and determines whether the current environment state of the camera terminal is indoor, outdoor or dark, including:
- the method before the setting of the two preset brightness thresholds in advance, the method further includes:
- the one-to-one correspondence between the environmental state and the initial value of the exposure is established in advance, and the corresponding relationship is: the outdoor environment corresponds to the first exposure initial value; the dark environment corresponds to the second exposure initial value; and the indoor environment corresponds to the third exposure initial value.
- the selecting an initial exposure value according to the determined environmental state comprises:
- the first exposure initial value corresponding to the outdoor environment is selected as an exposure initial value; when it is determined that the current camera terminal is in a dark state, Selecting the second exposure initial value corresponding to the dark environment as an exposure initial value; and when determining that the current camera terminal is in an indoor environment, selecting the third exposure corresponding to the indoor environment The initial value is taken as the initial value of the exposure.
- the control camera when receiving the instruction to start the camera, performs the opening delay according to the predetermined time, and simultaneously acquires the brightness value of the environment in which the current camera terminal is located, and sends the brightness value to the central processing unit, including:
- the control camera When receiving the instruction to start the camera, the control camera performs the on-delay according to the predetermined time, and at the same time, the brightness value of the environment in which the current camera terminal is located is acquired by the light sensor, and the brightness value is sent to the central processing unit.
- the predetermined time is not less than the brightness value obtained by the central processor triggering the light sensor to acquire the current environment until the central processor feeds back the brightness value to the camera and sets an exposure initial value. time.
- the embodiment of the invention further provides a control system for brightness of the camera when it is started, which comprises:
- a current brightness acquiring module configured to: when receiving an instruction to activate the camera, control the camera to perform a delay time according to a predetermined time, and simultaneously obtain a brightness value of an environment in which the current camera terminal is located, and send the brightness value to the central processing unit;
- An exposure value selection module configured to compare the brightness value with a preset brightness threshold, determine whether the current environment state of the camera terminal is indoor, outdoor or dark, and select a corresponding initial exposure value according to the determination result;
- a camera initialization module for performing camera initialization based on the selected exposure initial value.
- control system further includes:
- the first preset module is configured to separately set two preset brightness thresholds, where the preset brightness thresholds are: a preset brightness upper limit threshold and a preset brightness lower limit threshold, wherein the preset brightness upper limit threshold It is greater than the preset lower limit threshold.
- the exposure value selection module comprises:
- the first brightness comparison unit is configured to determine that the current environment state of the current camera terminal is outdoor when it is determined that the brightness value is greater than the preset brightness upper limit threshold.
- the exposure value selection module comprises:
- the second brightness comparison unit is configured to determine that the current environment state of the current camera terminal is dark when it is determined that the brightness value is less than the preset brightness lower limit threshold.
- the exposure value selection module comprises:
- the third brightness comparison unit is configured to determine that the current environment state of the current camera terminal is indoor when it is determined that the brightness value is between the preset brightness upper limit threshold and the preset brightness lower limit threshold.
- control system further includes:
- the second preset module is configured to pre-establish a one-to-one correspondence between the environment state and the initial value of the exposure, where the corresponding relationship is: the outdoor environment corresponds to the first exposure initial value; the dark environment corresponds to the second exposure initial value; the indoor environment corresponds to The third exposure initial value.
- the exposure value selection module further includes:
- the initial value selection unit is configured to: when it is determined that the current environment state of the current camera terminal is outdoor, select the first exposure initial value corresponding to the outdoor environment as an exposure initial value; when determining that the current camera terminal is located If the environmental state is dark, the second exposure initial value corresponding to the dark environment is selected as an exposure initial value; when it is determined that the current camera terminal is in an indoor environment, the indoor environment is selected The corresponding third exposure initial value is taken as an exposure initial value.
- the current brightness acquisition module is used to:
- the control camera When receiving the instruction to start the camera, the control camera performs the on-delay according to the predetermined time, and at the same time, the brightness value of the environment in which the current camera terminal is located is acquired by the light sensor, and the brightness value is sent to the central processing unit.
- the predetermined time is not less than the brightness value obtained by the central processor triggering the light sensor to acquire the current environment until the central processor feeds back the brightness value to the camera and sets an exposure initial value. time.
- An embodiment of the present invention further provides an image capturing terminal, including:
- One or more processors are One or more processors;
- One or more programs wherein the one or more programs are stored in the memory and configured to be executed by the processor, the one or more processors for executing the following instructions:
- the control camera When receiving the instruction to start the camera, the control camera performs the on-delay according to the predetermined time, and simultaneously acquires the brightness value of the environment in which the current camera terminal is located, and transmits the brightness value to the central processing unit;
- the central processor compares the brightness value with a preset brightness threshold, determines whether the current environment state of the current camera terminal is indoor, outdoor, or dark, and selects a corresponding initial exposure value according to the determined environmental state;
- the camera is initialized based on the selected initial exposure value.
- the one or more processors are further configured to execute the following instructions before acquiring the brightness value of the environment in which the current camera terminal is located and transmitting the brightness value to the central processor:
- the two preset brightness thresholds are set in advance, and the two preset brightness thresholds are: a preset brightness upper limit threshold and a preset brightness lower limit threshold, wherein the preset brightness upper limit threshold is greater than the preset brightness lower limit. Threshold.
- the invention provides a method, a system and a camera terminal for controlling the brightness of a camera when the camera is started, by comparing the brightness value of the environment where the current camera terminal is located before the camera is started, and comparing the brightness value with the preset brightness threshold to determine The environment in which the current camera terminal is located, and the corresponding initial exposure value is selected, and the camera is initialized according to the selected initial value of the exposure, thereby solving the problem of brightness change when the camera is turned on, ensuring a high-quality camera image, and shortening the application of opening the camera. Time is convenient for the user's use.
- Fig. 1 is a flow chart showing the steps of a method for controlling brightness at the time of startup of a camera of the present invention.
- FIG. 2 is a schematic diagram showing the principle of operation of the brightness comparison module in the method of the present invention.
- FIG. 3 is a schematic block diagram of a control system for brightness of a camera when it is activated.
- FIG. 4 is a schematic structural view of an image pickup terminal of the present invention.
- the present invention provides a method for controlling the brightness of the camera when it is activated.
- the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
- the invention provides a method for controlling the brightness of a camera when it is started. As shown in FIG. 1, the method comprises the following steps:
- the brightness value of the current environment is acquired by a light sensor or other light intensity acquiring device disposed above the camera terminal, and the brightness value is sent to the central processing unit.
- the current environment is the environmental state of the location where the camera terminal is located, which may be indoors, outdoors, and in the dark.
- this step is set before the camera is started, in order to achieve a smooth completion, in a specific implementation, when the central processor receives the instruction from the user to start the camera, the camera is controlled to delay after a predetermined time, and then the light sensor is triggered. Get the brightness value of the current environment and obtain the brightness value of the current environment. After obtaining the brightness value of the current environment, the camera is initialized according to the brightness of the current environment. The predetermined time is not less than a time when the central processor triggers the light sensor to acquire the brightness value of the current environment until the central processor feeds back the brightness value to the camera, and the camera automatically sets the exposure initial value.
- the central processor compares the brightness value with a preset brightness threshold, determines whether the current environment state of the current camera terminal is indoor, outdoor, or dark, and selects a corresponding initial exposure value according to the determination result.
- the central processor After receiving the brightness value of the current environment, the central processor compares it with the preset brightness threshold, determines whether the current environment is indoor or outdoor or dark, and selects a corresponding initial exposure value according to the judgment result.
- the method further includes:
- the two preset brightness thresholds are set in advance, and the two preset brightness thresholds are: a preset brightness upper limit threshold and a preset brightness lower limit threshold; the preset brightness upper limit threshold is greater than the preset brightness lower limit threshold. .
- the preset brightness upper limit threshold it is determined that the current ambient brightness is relatively strong, and is determined to be outdoor, if the brightness value is in the preset brightness upper limit threshold and the preset brightness lower limit threshold. If the current environment is lower than the preset lower limit threshold, it is determined that the current environment is dark.
- the step S1 further includes:
- the step S2 further includes:
- step S21 determining whether the brightness value is greater than the preset brightness upper limit threshold. If it is greater than, determining that the current camera terminal is in an outdoor state, otherwise performing step S22.
- the step S2 further includes:
- the first exposure initial value corresponding to the outdoor environment is selected as an exposure initial value; when it is determined that the current camera terminal is in a dark state, And selecting the second exposure initial value corresponding to the dark environment as an exposure initial value; when determining that the current camera terminal is in an indoor environment, selecting the third corresponding to the indoor environment The exposure initial value is taken as the exposure initial value.
- the camera is initialized according to the selected initial exposure value.
- the step can directly initialize the camera according to the selected initial exposure value, thereby realizing the brightness control when the imaging is started.
- the monitoring module of the monitoring camera terminal in the mobile phone enters a working state
- the light sensor If it is detected that the camera terminal is in the awake state, the light sensor is activated, the light sensor detects the brightness value of the environment in which the current camera terminal is located; if the camera terminal is not in the awake state, the image terminal is continuously detected.
- the central processor reads the brightness value.
- the central processing unit comparing the brightness value L of the acquired environment of the camera terminal with the set brightness threshold; detecting the brightness threshold when the camera terminal is in the awake state, setting an upper limit brightness threshold L out and a lower limit brightness The threshold L in , and the upper limit luminance threshold L out is greater than the lower limit luminance threshold L in .
- the upper limit brightness threshold, the lower limit brightness threshold and the setting of each initial exposure value may be adjusted according to changes in the external environment in which the individual is located; if not set, the output is the value saved when the camera terminal last exits.
- the ambient brightness of the camera terminal is compared with the set upper limit brightness threshold and the lower limit brightness threshold by the brightness comparison module.
- the schematic diagram of the brightness comparison module refers to FIG. 2 .
- the brightness value of the camera terminal read by the central processing unit enters the brightness comparison module, first enters the upper limit brightness threshold comparison module; when the brightness value L is greater than the upper limit brightness threshold, it determines that the environment in which the camera terminal is located is outdoor, otherwise, enters the next lower limit a brightness threshold comparison module; when entering the lower limit brightness threshold comparison module, comparing the brightness value of the camera terminal with the lower limit brightness threshold; when the brightness value L is less than the lower limit brightness threshold, determining that the environment in which the camera terminal is located is a dark room; otherwise, determining the camera The environment in which the terminal is located is indoors.
- the initial exposure of the camera terminal in various environments may also be set; if it is determined that the environment in which the camera terminal is located is outdoor, the corresponding initial exposure The value is E out ; if it is determined that the environment in which the camera terminal is located is indoor, the corresponding initial exposure value is E in ; if it is determined that the environment in which the camera terminal is located is a dark room, the corresponding initial exposure value is E low; according to the camera terminal The result of the environment is given the initial exposure value; the camera initialization is performed according to the selected exposure initial value, and the brightness is controlled.
- the initial exposure value is 30 LUX.
- the brightness value read by the central processing unit is 500 LUX.
- the brightness value is less than the upper limit brightness threshold, and then enters the next lower limit brightness threshold comparison module.
- the brightness value is greater than the lower limit brightness threshold, the environment in which the mobile phone is located is determined. For indoors.
- the initial brightness of the initialized camera is 250 LUX, and the camera brightness initialization is completed.
- the method of the invention reads the current ambient brightness value in real time through the light sensor, and informs the central processing unit of the control center that when the camera application is turned on, the central processor notifies the current brightness of the camera module, so that the camera exposure module initializes the appropriate exposure amount. Therefore, the camera can get the proper exposure in the first few frames, and the screen will not change from bright to dark or from dark to bright, thus improving the camera intelligence and providing the user with the use. convenient.
- the present invention further provides a control system for brightness of a camera when it is started.
- the system includes:
- the current brightness obtaining module 100 is configured to acquire a brightness value of an environment where the current camera terminal is located before the camera is started, and send the brightness value to the central processor; the function is as described in step S1.
- the exposure value selection module 200 is configured to compare the brightness value with a preset brightness threshold, determine whether the current environment state of the current camera terminal is indoor, outdoor or dark, and select a corresponding initial exposure value according to the determination result; The function is as described in step S2.
- the camera initialization module 300 is configured to perform camera initialization according to the selected exposure initial value, and the function is as described in step S3.
- the brightness control system of the camera when starting up further includes:
- the first preset module 400 is configured to separately set two preset brightness thresholds, where the preset brightness thresholds are: a preset brightness upper limit threshold and a preset brightness lower limit threshold; the preset brightness upper limit threshold is greater than Preset the lower brightness threshold.
- the exposure value selection module 200 includes:
- the first brightness comparison unit 2001 is configured to determine that the current environment state of the current camera terminal is outdoor when determining that the brightness value is greater than the preset brightness upper limit threshold;
- the second brightness comparison unit 2002 is configured to determine, when the brightness value is less than the preset brightness lower limit threshold, that the current environment state of the camera terminal is dark;
- the third brightness comparison unit 2003 is configured to determine that the current environment state of the current camera terminal is indoor when it is determined that the brightness value is between the preset brightness upper limit threshold and the preset brightness lower limit threshold.
- the brightness control system of the camera when starting up further includes:
- the second preset module 500 is configured to pre-establish a one-to-one correspondence between the environmental state and the initial exposure value, where the corresponding relationship is: the outdoor environment corresponds to the first exposure initial value; the dark environment corresponds to the second exposure initial value; the indoor environment Corresponds to the third exposure initial value.
- the exposure value selection module 200 further includes:
- the initial value selection unit 2004 is configured to: when it is determined that the current environment state of the current camera terminal is outdoor, select the first exposure initial value corresponding to the outdoor environment as an exposure initial value; when determining that the current camera terminal is located If the environmental state is dark, the second exposure initial value corresponding to the dark environment is selected as an exposure initial value; when it is determined that the current camera terminal is in an indoor environment, the indoor environment is selected The corresponding third exposure initial value is taken as an exposure initial value.
- the present invention also discloses an imaging terminal for performing a control method for brightness when the camera is activated, and/or a control system for operating brightness when the camera is activated.
- the terminal device includes:
- the Fidelity module 407 includes a processor 408 having one or more processing cores, and a power supply 409 and the like. It will be understood by those skilled in the art that the terminal structure shown in FIG. 4 does not constitute a limitation to the terminal, and may include more or less components than those illustrated, or a combination of certain components, or different component arrangements.
- the processor 408 in the terminal loads the executable program code corresponding to the process of one or more applications into the memory 402 according to the corresponding instruction, and is stored and stored by the processor 408.
- the application program in the memory 402 performs the above-described control method of brightness at the time of camera startup or a control system that operates the brightness at the time of startup of the camera, thereby implementing various functions corresponding thereto.
- the storage medium may be a magnetic disk, an optical disk, a read only memory (ROM) or a random access memory (RAM).
- the present invention obtains the brightness value of the environment where the current camera terminal is located before the camera is started, and compares the brightness value with the preset brightness threshold to determine the environment of the current camera terminal and select the corresponding exposure.
- the initial value is used to initialize the camera according to the selected initial value of the exposure, thereby solving the problem of brightness change when the camera is turned on, ensuring high The quality of the camera screen, while shortening the time to open the camera application, for the convenience of users.
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Abstract
本发明提供了一种摄像头启动时亮度的控制方法、系统及摄像终端，所述方法包括：通过在摄像头启动前获取当前摄像终端所处环境的亮度值，并将亮度值与预设亮度阈值进行比对，以判断当前摄像终端所处环境，并选择对应的曝光初始值，根据选择出的曝光初始值对摄像头初始化，从而解决了摄像头开启时明暗变化的问题。
Description
本发明涉及终端显示控制技术领域，尤其涉及的是一种摄像头启动时亮度的控制方法、系统及摄像终端。
随着智能终端设备中视频通话、拍照、摄像等功能的普遍应用,摄像头作为智能终端设备的重要组成部分,如何拍摄出高品质画面是摄像头应用的主要的技术指标。但是现有摄像头应用的过程中,存在刚启动摄像头时产生的曝光度不够或曝光度过多的问题,会产生低品质的摄像画面，用户体验差。
因此，现有技术有待于进一步的改进。
本发明提供一种摄像头启动时亮度的控制方法、系统及摄像终端，克服现有技术中摄像头在启动过程中产生的曝光度不够或曝光度过多的问题,会产生低品质的摄像画面，用户体验差的技术问题。
本发明解决技术问题所采用的技术方案如下：
本发明实施例提供了一种摄像头启动时亮度的控制方法，其中包括：
当接收到启动摄像头的指令时，控制摄像头按照预定时间进行开启延时，同时获取当前摄像终端所处环境的亮度值，并将所述亮度值发送到中央处理器；
所述中央处理器将所述亮度值与预设亮度阈值进行比对，判断当前摄像终端所处环境状态为室内、室外还是暗处，并根据判定结果选择对应的曝光初始值；以及
根据选择出的曝光初始值进行摄像头初始化。
优选的，在所述获取当前摄像终端所处环境的亮度值，并将所述亮度值发送到中央处理器之前还包括：
预先分别对两个预设亮度阈值进行设置，所两个预设亮度阈值为：预设亮度上限阈值和预设亮度下限阈值，其中，所述预设亮度上限阈值大于所述预设亮度下限阈值。
优选的，所述中央处理器将所述亮度值与预设亮度阈值进行比对，判断当前摄像终端所处环境状态为室内、室外还是暗处，包括：
当确定所述亮度值大于所述预设亮度上限阈值时，判定当前摄像终端所处环境状态为室外。
优选的，所述中央处理器将所述亮度值与预设亮度阈值进行比对，判断当前摄像终端所处环境状态为室内、室外还是暗处，包括：
当确定所述亮度值小于所述预设亮度下限阈值时，判定当前摄像终端所处环境状态为暗处。
优选的，所述中央处理器将所述亮度值与预设亮度阈值进行比对，判断当前摄像终端所处环境状态为室内、室外还是暗处，包括：
当确定所述亮度值处于所述预设亮度上限阈值与所述预设亮度下限阈值之间时，判定当前摄像终端所处环境状态为室内。
优选的，在所述预先分别对两个预设亮度阈值进行设置之前，还包括：
预先建立环境状态与曝光初始值的一一对应关系，所述对应关系为：室外环境对应第一曝光初始值；暗处环境对应第二曝光初始值；室内环境对应第三曝光初始值。
优选的，所述根据判定出的环境状态选择对应的曝光初始值，包括：
当判断出当前摄像终端所处环境状态为室外，则选取与所述室外环境相对应的所述第一曝光初始值作为曝光初始值；当判断出当前摄像终端所处环境状态为暗处，则选取与所述暗处环境相对应的所述第二曝光初始值作为曝光初始值；当判断出当前摄像终端所处环境状态为室内，则选取与所述室内环境相对应的所述第三曝光初始值作为曝光初始值。
优选的，所述当接收到启动摄像头的指令时，控制摄像头按照预定时间进行开启延时，同时获取当前摄像终端所处环境的亮度值，并将所述亮度值发送到中央处理器，包括：
当接收到启动摄像头的指令时，控制摄像头按照预定时间进行开启延时，同时通过光传感器获取当前摄像终端所处环境的亮度值，并将所述亮度值发送到中央处理器。
优选的，所述预定时间不小于所述中央处理器触发到所述光传感器获取当前环境的亮度值，一直到所述中央处理器将所述亮度值反馈到所述摄像头并设置曝光初始值的时间。本发明实施例还提供了一种摄像头启动时亮度的控制系统，其包括：
当前亮度获取模块，用于当接收到启动摄像头的指令时，控制摄像头按照预定时间进行开启延时，同时获取当前摄像终端所处环境的亮度值，并将所述亮度值发送到中央处理器；
曝光值选取模块，用于将所述亮度值与预设亮度阈值进行比对，判断当前摄像终端所处环境状态为室内、室外还是暗处，并根据判定结果选择对应的曝光初始值；以及
摄像头初始化模块，用于根据选择出的曝光初始值进行摄像头初始化。
优选的，所述控制系统还包括：
第一预设模块，用于预先分别对两个预设亮度阈值进行设置，所两个预设亮度阈值为：预设亮度上限阈值和预设亮度下限阈值，其中，所述预设亮度上限阈值大于所述预设亮度下限阈值。
优选的，所述曝光值选取模块包括：
第一亮度比对单元，用于当确定所述亮度值大于所述预设亮度上限阈值时，判定当前摄像终端所处环境状态为室外。
优选的，所述曝光值选取模块包括：
第二亮度比对单元，用于当确定所述亮度值小于所述预设亮度下限阈值时，判定当前摄像终端所处环境状态为暗处。
优选的，所述曝光值选取模块包括：
第三亮度比对单元，用于当确定所述亮度值处于所述预设亮度上限阈值与所述预设亮度下限阈值之间时，判定当前摄像终端所处环境状态为室内。
优选的，所述控制系统还包括：
第二预设模块，用于预先建立环境状态与曝光初始值的一一对应关系，所述对应关系为：室外环境对应第一曝光初始值；暗处环境对应第二曝光初始值；室内环境对应第三曝光初始值。
优选的，所述曝光值选取模块还包括：
初始值选择单元，用于当判断出当前摄像终端所处环境状态为室外，则选取与所述室外环境相对应的所述第一曝光初始值作为曝光初始值；当判断出当前摄像终端所处环境状态为暗处，则选取与所述暗处环境相对应的所述第二曝光初始值作为曝光初始值；当判断出当前摄像终端所处环境状态为室内，则选取与所述室内环境相对应的所述第三曝光初始值作为曝光初始值。
优选的，所述当前亮度获取模块用于：
当接收到启动摄像头的指令时，控制摄像头按照预定时间进行开启延时，同时通过光传感器获取当前摄像终端所处环境的亮度值，并将所述亮度值发送到中央处理器。
优选的，所述预定时间不小于所述中央处理器触发到所述光传感器获取当前环境的亮度值，一直到所述中央处理器将所述亮度值反馈到所述摄像头并设置曝光初始值的时间。本发明实施例还提供了一种摄像终端，其包括：
一个或多个处理器；
存储器，以及
一个或多个程序，其中所述一个或多个程序被存储于所述存储器中，并配置为由所述处理器执行，所述一个或多个处理器用于执行如下指令：
当接收到启动摄像头的指令时，控制摄像头按照预定时间进行开启延时，同时获取当前摄像终端所处环境的亮度值，并将所述亮度值发送到中央处理器；
所述中央处理器将所述亮度值与预设亮度阈值进行比对，判断当前摄像终端所处环境状态为室内、室外还是暗处，并根据判定出的环境状态选择对应的曝光初始值；以及
根据选择出的曝光初始值对摄像头初始化。
优选的，其中所述一个或多个处理器在用于获取当前摄像终端所处环境的亮度值，并将所述亮度值发送到中央处理器之前，还用于执行如下指令：
预先分别对两个预设亮度阈值进行设置，所述两个预设亮度阈值为：预设亮度上限阈值和预设亮度下限阈值，其中，所述预设亮度上限阈值大于所述预设亮度下限阈值。
本发明提供了一种摄像头启动时亮度的控制方法、系统及摄像终端，通过在摄像头启动前获取当前摄像终端所处环境的亮度值，并将亮度值与预设亮度阈值进行比对，以判断当前摄像终端所处环境，并选择对应的曝光初始值，根据选择出的曝光初始值对摄像头初始化，从而解决了摄像头开启时明暗变化的问题，保证高品质的摄像画面，同时缩短打开摄像头应用的时间，给用户的使用带了便利。
图1是本发明的一种摄像头启动时亮度的控制方法的步骤流程图。
图2是本发明所述方法中亮度比较模块工作的原理示意图。
图3是本发明的一种摄像头启动时亮度的控制系统的原理框图。
图4是本发明的摄像终端的结构示意图。
本发明提供了一种摄像头启动时亮度的控制方法，为使本发明的目的、技术方案及优点更加清楚、明确，以下参照附图并举实施例对本发明进一步详细说明。应当理解，此处所描述的具体实施例仅仅用于解释本发明，并不用于限定本发明。
本发明提供了一种摄像头启动时亮度的控制方法，如图1所示，所述方法包括以下步骤：
S1 、在摄像头启动前，获取当前摄像终端所处环境的亮度值，并将所述亮度值发送到中央处理器。
在摄像头启动前，通过设置在摄像终端上方的光传感器或者其他光强度获取装置获取当前环境所处的亮度值，并将所述亮度值发送到中央处理器。当前环境为摄像终端所处位置的环境状态，其可以为室内、室外和暗处。
由于本步骤设置在摄像头启动之前，为了实现顺利完成，在具体实施时，可以设置当中央处理器接收到用户发出启动摄像头的指令后，先控制摄像头延时预定时间后再开启，且触发光传感器获取当前环境的亮度值，获取当前环境的亮度值。当获取到当前环境的亮度值后，根据当前环境的亮度对摄像头进行初始化。所述预定时间不小于中央处理器触发到光传感器获取当前环境的亮度值，一直到中央处理器将所述亮度值反馈到摄像头，摄像头自动设置曝光初始值的时间。
S2
、所述中央处理器将所述亮度值与预设亮度阈值进行比对，判断当前摄像终端所处环境状态为室内、室外还是暗处，并根据判定结果选择对应的曝光初始值。
当中央处理器接收到当前环境的亮度值后，将其与预设亮度阈值进行比对，判断当前环境为室内还是室外或者暗处，并根据判断结果选择相应的曝光初始值。
所述步骤S1之前还包括：
S11
、预先分别对两个预设亮度阈值进行设置，所述两个预设亮度阈值为：预设亮度上限阈值和预设亮度下限阈值；所述预设亮度上限阈值大于所述预设亮度下限阈值。当获取的所述亮度值超出所述预设亮度上限阈值，则确定当前环境亮度比较强，判定为室外，若所述亮度值处于所述预设亮度上限阈值与所述预设亮度下限阈值之间，则判定当前环境为室内，若当前环境的亮度值低于所述预设亮度下限阈值，则判定当前环境为暗处。
为了更好根据判定出的结果，对应选择相适配的曝光初始值，所述步骤S1之前还包括：
S12
、预先建立环境状态与曝光初始值的一一对应关系，所述对应关系为：室外环境对应第一曝光初始值；暗处环境对应第二曝光初始值；室内环境对应第三曝光初始值。
所述步骤S2中还包括：
S21
、判断所述亮度值是否大于所述预设亮度上限阈值，若大于，则判定当前摄像终端所处环境状态为室外，否则执行步骤S22。
S22
、判断所述亮度值是否小于所述预设亮度下限阈值，若小于，则判定当前摄像终端所处环境状态为暗处，否则，判定当前摄像终端所处环境状态为室内。
所述步骤S2还包括：
S23
、当判断出当前摄像终端所处环境状态为室外，则选取与所述室外环境相对应的所述第一曝光初始值作为曝光初始值；当判断出当前摄像终端所处环境状态为暗处，则选取与所述暗处环境相对应的所述第二曝光初始值作为曝光初始值；当判断出当前摄像终端所处环境状态为室内，则选取与所述室内环境相对应的所述第三曝光初始值作为曝光初始值。
S3 、根据选择出的曝光初始值进行摄像头初始化。
由于在上述步骤中已经根据当前环境状态选择出曝光初始值，则本步骤可直接根据选择出的曝光初始值对摄像头进行初始化，实现对摄像启动时的亮度控制。
如图2所示，对其具体实施例，下面列举一个实际例子进行说明：
当用户打开手机，手机中监测摄像终端的监测模块进入工作状态；
如果监测到摄像终端处于被唤醒状态，则光传感器被激活，光传感器检测当前摄像终端所处环境的亮度值;如果摄像终端未处于唤醒状态，则继续对摄像终端进行检测。
当光传感器获取当前摄像终端所处环境的亮度值L后，中央处理器对此亮度值进行读取。
在中央处理器中，对获取的摄像终端所处环境的亮度值L与设置的亮度阈值进行比较;检测到摄像终端处于被唤醒状态时设置亮度阈值，设置一个上限亮度阈值Lout与一个下限亮度阈值Lin，并且上限亮度阈值Lout大于下限亮度阈值Lin
。上限亮度阈值，下限亮度阈值及各个初始曝光值的设置可以根据个人所处的外界环境的变化做出响应的调整;如果不进行设置，则输出的为摄像终端上一次退出时保存的值。
通过亮度比较模块来实现摄像终端所处环境亮度与设置的上限亮度阈值和下限亮度阈值进行比较，亮度比较模块的原理图参考图2。
中央处理器读取的摄像终端的亮度值进入亮度比较模块，首先进入上限亮度阈值比较模块;当亮度值L大于上限亮度阈值，则判定摄像终端所处的环境为室外，否则，进入下一个下限亮度阈值比较模块；当进入下限亮度阈值比较模块，比较摄像终端的亮度值与下限亮度阈值的大小;当亮度值L小于下限亮度阈值，则判定摄像终端所处的环境为暗室，否则，判定摄像终端所处的环境为室内。
在检测到摄像终端处于被唤醒状态设置亮度阈值的同时，也应对摄像终端各种所处环境一一对应的初始曝光度进行设置；如果判定摄像终端所处的环境为室外，则对应的初始曝光值为Eout;如果判定摄像终端所处的环境为室内，则对应的初始曝光值为Ein;如果判定摄像终端所处的环境为暗室，则对应的初始曝光值为Elow;根据摄像终端所处的环境的结果给出初始曝光值;
根据选择出的曝光初始值进行摄像头初始化，进行亮度的控制。
打开手机摄像功能，此时监测到摄像头处于被唤醒状态；设置上限亮度阈值为1000LUX,设置下限亮度阈值为50LUX;设置室外的初始曝光值为5000LUX,设置室内的初始曝光值为250LUX,设置暗室的初始曝光值为30LUX。
假设中央处理器读取的亮度值为500LUX,当进入亮度比较模块时，亮度值小于上限亮度阈值，则进入下一个下限亮度阈值比较模块，亮度值大于下限亮度阈值，则判定手机所处的环境为室内。
根据最初设置的室内初始曝光值为250LUX，则初始化的摄像头的亮度初始值为250LUX，完成摄像头亮度初始化。
本发明所述方法，通过光传感器实时读取当前环境亮度值，并告知控制中心的中央处理器，在打开摄像头应用时，中央处理器告知摄像头模块当前亮度，使摄像头曝光模块初始化合适的曝光量，从而让摄像头在前几帧的画面就可以得到合适的曝光，画面也就不会出现由亮到暗或由暗到亮变化，因此提高了摄像头智能性的同时，也为用户的使用提供了便利。
在上述方法的基础上，本发明还提供了一种摄像头启动时亮度的控制系统，如图3所示，所述系统包括：
当前亮度获取模块100，用于在摄像头启动前，获取当前摄像终端所处环境的亮度值，并将所述亮度值发送到中央处理器；其功能如步骤S1所述。
曝光值选取模块200，用于将所述亮度值与预设亮度阈值进行比对，判断当前摄像终端所处环境状态为室内、室外还是暗处，并根据判定结果选择对应的曝光初始值；其功能如步骤S2所述。
摄像头初始化模块300，用于根据选择出的曝光初始值进行摄像头初始化，其功能如步骤S3所述。
所述摄像头启动时亮度的控制系统，还包括：
第一预设模块400，用于预先分别对两个预设亮度阈值进行设置，所两个预设亮度阈值为：预设亮度上限阈值和预设亮度下限阈值；所述预设亮度上限阈值大于预设亮度下限阈值。
所述曝光值选取模块200包括：
第一亮度比对单元2001，用于当确定所述亮度值大于所述预设亮度上限阈值时，判定当前摄像终端所处环境状态为室外；
第二亮度比对单元2002，用于当确定所述亮度值小于所述预设亮度下限阈值时，判定当前摄像终端所处环境状态为暗处；
第三亮度比对单元2003，用于当确定所述亮度值处于所述预设亮度上限阈值与所述预设亮度下限阈值之间时，判定当前摄像终端所处环境状态为室内。
所述摄像头启动时亮度的控制系统，还包括：
第二预设模块500，用于预先建立环境状态与曝光初始值的一一对应关系，所述对应关系为：室外环境对应第一曝光初始值；暗处环境对应第二曝光初始值；室内环境对应第三曝光初始值。
所述曝光值选取模块200还包括：
初始值选择单元2004，用于当判断出当前摄像终端所处环境状态为室外，选取与所述室外环境相对应的所述第一曝光初始值作为曝光初始值；当判断出当前摄像终端所处环境状态为暗处，则选取与所述暗处环境相对应的所述第二曝光初始值作为曝光初始值；当判断出当前摄像终端所处环境状态为室内，则选取与所述室内环境相对应的所述第三曝光初始值作为曝光初始值。
在上述系统的基础上，本发明还公开了一种摄像终端，用于执行上所述摄像头启动时亮度的控制方法、和/或运行所述摄像头启动时亮度的控制系统。如图4所示，所述终端设备包括：
射频（RF，Radio
Frequency）电路401、包括有一个或一个以上计算机可读存储介质的存储器402、输入单元403、显示单元404、传感器405、音频电路406、无线保真（WiFi，Wireless
Fidelity)模块407、包括有一个或者一个以上处理核心的处理器408、以及电源409等部件。本领域技术人员可以理解，图4中示出的终端结构并不构成对终端的限定，可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件布置。
具体在本实施例中，终端中的处理器408会按照相应的指令，将一个或一个以上的应用程序的进程对应的可执行程序代码加载到存储器402中，并由处理器408来运行存储在存储器402中的应用程序，从而执行上述摄像头启动时亮度的控制方法或运行上述摄像头启动时亮度的控制系统，进而实现对应的各种功能。
上述操作具体可参见前面的方法实施例，在此不再赘述。
本领域普通技术人员可以理解上述实施例方法中的全部或部分流程，是可以通过计算机程序来指令相关的硬件完成，所述的计算机程序可存储于一计算机可读取存储介质中，程序在执行时，可包括上述各方法的实施例的流程。其中的存储介质可以为磁碟、光盘、只读存储记忆体（ROM）或随机存储记忆体（RAM）等。
综上所述，本发明通过在摄像头启动前获取当前摄像终端所处环境的亮度值，并将亮度值与预设亮度阈值进行比对，以判断当前摄像终端所处环境，并选择对应的曝光初始值，根据选择出的曝光初始值对摄像头初始化，从而解决了摄像头开启时明暗变化的问题，保证高
品质的摄像画面，同时 缩短打开摄像头应用的时间，以方便用户使用。
可以理解的是，对本领域普通技术人员来说，可以根据本发明的技术方案及其发明构思加以等同替换或改变，而所有这些改变或替换都应属于本发明所附的权利要求的保护范围。
Claims (20)
- 一种摄像头启动时亮度的控制方法，其包括：当接收到启动摄像头的指令时，控制摄像头按照预定时间进行开启延时，同时获取当前摄像终端所处环境的亮度值，并将所述亮度值发送到中央处理器；所述中央处理器将所述亮度值与预设亮度阈值进行比对，判断当前摄像终端所处环境状态为室内、室外还是暗处，并根据判定出的环境状态选择对应的曝光初始值；以及根据选择出的曝光初始值对摄像头初始化。
- 根据权利要求1所述的摄像头启动时亮度的控制方法，其中在所述获取当前摄像终端所处环境的亮度值，并将所述亮度值发送到中央处理器之前还包括：预先分别对两个预设亮度阈值进行设置，所述两个预设亮度阈值为：预设亮度上限阈值和预设亮度下限阈值，其中，所述预设亮度上限阈值大于所述预设亮度下限阈值。
- 根据权利要求2所述的摄像头启动时亮度的控制方法，其中所述中央处理器将所述亮度值与预设亮度阈值进行比对，判断当前摄像终端所处环境状态为室内、室外还是暗处，包括：当确定所述亮度值大于所述预设亮度上限阈值时，判定当前摄像终端所处环境状态为室外。
- 根据权利要求2所述的摄像头启动时亮度的控制方法，其中所述中央处理器将所述亮度值与预设亮度阈值进行比对，判断当前摄像终端所处环境状态为室内、室外还是暗处，包括：当确定所述亮度值小于所述预设亮度下限阈值时，判定当前摄像终端所处环境状态为暗处。
- 根据权利要求2所述的摄像头启动时亮度的控制方法，其中所述中央处理器将所述亮度值与预设亮度阈值进行比对，判断当前摄像终端所处环境状态为室内、室外还是暗处，包括：当确定所述亮度值处于所述预设亮度上限阈值与所述预设亮度下限阈值之间时，判定当前摄像终端所处环境状态为室内。
- 根据权利要求2所述的摄像头启动时亮度的控制方法，其中在所述预先分别对两个预设亮度阈值进行设置之前，还包括：预先建立环境状态与曝光初始值的一一对应关系，所述对应关系为：室外环境对应第一曝光初始值；暗处环境对应第二曝光初始值；室内环境对应第三曝光初始值。
- 根据权利要求6所述的摄像头启动时亮度的控制方法，其中所述根据判定出的环境状态选择对应的曝光初始值，包括：当判断出当前摄像终端所处环境状态为室外，则选取与所述室外环境相对应的所述第一曝光初始值作为曝光初始值；当判断出当前摄像终端所处环境状态为暗处，则选取与所述暗处环境相对应的所述第二曝光初始值作为曝光初始值；当判断出当前摄像终端所处环境状态为室内，则选取与所述室内环境相对应的所述第三曝光初始值作为曝光初始值。
- 根据权利要求1所述的摄像头启动时亮度的控制方法，其中所述当接收到启动摄像头的指令时，控制摄像头按照预定时间进行开启延时，同时获取当前摄像终端所处环境的亮度值，并将所述亮度值发送到中央处理器，包括：当接收到启动摄像头的指令时，控制摄像头按照预定时间进行开启延时，同时通过光传感器获取当前摄像终端所处环境的亮度值，并将所述亮度值发送到中央处理器。
- 根据权利要求8所述的摄像头启动时亮度的控制方法，其中所述预定时间不小于所述中央处理器触发到所述光传感器获取当前环境的亮度值，一直到所述中央处理器将所述亮度值反馈到所述摄像头并设置曝光初始值的时间。
- 一种摄像头启动时亮度的控制系统，其包括：当前亮度获取模块，用于当接收到启动摄像头的指令时，控制摄像头按照预定时间进行开启延时，同时，获取当前摄像终端所处环境的亮度值，并将所述亮度值发送到中央处理器；曝光值选取模块，用于将所述亮度值与预设亮度阈值进行比对，判断当前摄像终端所处环境状态为室内、室外还是暗处，并根据判定结果选择对应的曝光初始值；以及摄像头初始化模块，用于根据选择出的曝光初始值进行摄像头初始化。
- 根据权利要求10所述的摄像头启动时亮度的控制系统，其中所述控制系统还包括：第一预设模块，用于预先分别对两个预设亮度阈值进行设置，所述两个预设亮度阈值为：预设亮度上限阈值和预设亮度下限阈值，其中，所述预设亮度上限阈值大于所述预设亮度下限阈值。
- 根据权利要求11所述的摄像头启动时亮度的控制系统，其中所述曝光值选取模块包括：第一亮度比对单元，用于当确定所述亮度值大于所述预设亮度上限阈值时，判定当前摄像终端所处环境状态为室外；
- 根据权利要求11所述的摄像头启动时亮度的控制系统，其中所述曝光值选取模块包括：第二亮度比对单元，用于当确定所述亮度值小于所述预设亮度下限阈值时，判定当前摄像终端所处环境状态为暗处。
- 根据权利要求11所述的摄像头启动时亮度的控制系统，其中所述曝光值选取模块包括：第三亮度比对单元，用于当确定所述亮度值处于所述预设亮度上限阈值与所述预设亮度下限阈值之间时，判定当前摄像终端所处环境状态为室内。
- 根据权利要求11所述的摄像头启动时亮度的控制系统，其中所述控制系统还包括：第二预设模块，用于预先建立环境状态与曝光初始值的一一对应关系，所述对应关系为：室外环境对应第一曝光初始值；暗处环境对应第二曝光初始值；室内环境对应第三曝光初始值。
- 根据权利要求15所述的摄像头启动时亮度的控制系统，其中所述曝光值选取模块还包括：初始值选择单元，用于当判断出当前摄像终端所处环境状态为室外，则选取与所述室外环境相对应的所述第一曝光初始值作为曝光初始值；当判断出当前摄像终端所处环境状态为暗处，则选取与所述暗处环境相对应的所述第二曝光初始值作为曝光初始值；当判断出当前摄像终端所处环境状态为室内，则选取与所述室内环境相对应的所述第三曝光初始值作为曝光初始值。
- 根据权利要求10所述的摄像头启动时亮度的控制系统，其中所述当前亮度获取模块用于：当接收到启动摄像头的指令时，控制摄像头按照预定时间进行开启延时，同时通过光传感器获取当前摄像终端所处环境的亮度值，并将所述亮度值发送到中央处理器。
- 根据权利要求17所述的摄像头启动时亮度的控制系统，其中所述预定时间不小于所述中央处理器触发到所述光传感器获取当前环境的亮度值，一直到所述中央处理器将所述亮度值反馈到所述摄像头并设置曝光初始值的时间。
- 一种摄像终端，其包括：一个或多个处理器；存储器，以及一个或多个程序，其中所述一个或多个程序被存储于所述存储器中，并配置为由所述处理器执行，所述一个或多个处理器用于执行如下指令：当接收到启动摄像头的指令时，控制摄像头按照预定时间进行开启延时，同时获取当前摄像终端所处环境的亮度值，并将所述亮度值发送到中央处理器；所述中央处理器将所述亮度值与预设亮度阈值进行比对，判断当前摄像终端所处环境状态为室内、室外还是暗处，并根据判定出的环境状态选择对应的曝光初始值；以及根据选择出的曝光初始值对摄像头初始化。
- 根据权利要求19所述的摄像终端，其中所述一个或多个处理器在用于获取当前摄像终端所处环境的亮度值，并将所述亮度值发送到中央处理器之前，还用于执行如下指令：预先分别对两个预设亮度阈值进行设置，所述两个预设亮度阈值为：预设亮度上限阈值和预设亮度下限阈值，其中，所述预设亮度上限阈值大于所述预设亮度下限阈值。
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| CN107040726B (zh) * | 2017-04-19 | 2020-04-07 | 宇龙计算机通信科技(深圳)有限公司 | 双摄像头同步曝光方法及系统 |
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