WO2022227200A1 - 一种拍摄分辨率的调整方法及装置、智能设备 - Google Patents

一种拍摄分辨率的调整方法及装置、智能设备 Download PDF

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Publication number
WO2022227200A1
WO2022227200A1 PCT/CN2021/097176 CN2021097176W WO2022227200A1 WO 2022227200 A1 WO2022227200 A1 WO 2022227200A1 CN 2021097176 W CN2021097176 W CN 2021097176W WO 2022227200 A1 WO2022227200 A1 WO 2022227200A1
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Prior art keywords
resolution
shooting
object distance
brightness
distance information
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PCT/CN2021/097176
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English (en)
French (fr)
Inventor
胡泽
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东莞市小精灵教育软件有限公司
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Publication of WO2022227200A1 publication Critical patent/WO2022227200A1/zh

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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
    • H04N23/60—Control of cameras or camera modules
    • 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

Definitions

  • the present invention relates to the technical field of terminal equipment, in particular to a method and device for adjusting the shooting resolution, and an intelligent device.
  • smart devices such as smartphones and smart watches are usually equipped with a high-resolution camera in order to have better shooting effects.
  • the purpose of the present invention is to provide a method and device for adjusting the shooting resolution, and an intelligent device, which are used to solve the imbalance between the resolution and the power consumption and memory in the prior art.
  • a method for adjusting a shooting resolution comprising: acquiring information on environmental brightness and object distance during shooting; and determining a shooting resolution according to the environmental brightness and the object distance information.
  • determining the shooting resolution according to the ambient brightness and object distance information includes:
  • the shooting resolution is adjusted to the second resolution; the first brightness threshold is greater than the second brightness threshold.
  • determining the shooting resolution according to the ambient brightness and object distance information further includes:
  • the shooting resolution is adjusted to the first resolution.
  • determining the shooting resolution according to the ambient brightness and object distance information further includes:
  • the shooting resolution is adjusted to the second resolution.
  • the obtaining ambient brightness during shooting includes:
  • the ambient brightness is determined according to the read sensitivity ISO value of the camera.
  • the acquisition of the object distance information during shooting includes:
  • the object distance information is determined according to the read drive current value of the motor when the camera is in focus.
  • the present invention also provides a device for adjusting the shooting resolution, comprising:
  • the information acquisition module is used to acquire ambient brightness and object distance information during shooting
  • a resolution determination module configured to determine the shooting resolution according to the ambient brightness and object distance information.
  • the resolution determination module is further configured to adjust the shooting resolution to a second resolution when the ambient brightness is greater than a first brightness threshold or less than a second brightness threshold; the first brightness The threshold is greater than the second luminance threshold.
  • the information acquisition module is further configured to determine the object distance information according to the read drive current value of the motor when the camera is in focus.
  • the present invention also provides an intelligent device, comprising: a memory for storing a computer program; and a processor for implementing the aforementioned method for adjusting the shooting resolution when the computer program is executed.
  • Dynamically adjust the shooting resolution according to the ambient brightness and object distance information during shooting which can balance the performance of sharpness and power consumption and memory.
  • the power consumption and memory resource occupation are reduced, and the customer's needs are improved. experience.
  • FIG. 1 is a flowchart of an embodiment of a method for adjusting a shooting resolution of the present invention
  • FIG. 2 is a flowchart of another embodiment of a method for adjusting a shooting resolution of the present invention
  • FIG. 3 is a schematic structural diagram of an embodiment of an apparatus for adjusting the shooting resolution of the present invention.
  • FIG. 4 is a schematic structural diagram of an embodiment of a smart device of the present invention.
  • two shooting modes are available for users to choose from, such as smart shooting and high-definition shooting.
  • For HD shooting use high resolution.
  • the device automatically selects the shooting resolution according to the application scenario, which can achieve a dynamic balance between shooting clarity and performance such as power consumption and memory.
  • the present invention automatically adjusts the shooting resolution according to the environmental brightness and object distance information during shooting, and achieves a balance between performance such as power consumption and memory and shooting clarity while meeting user needs, thereby improving customer experience.
  • performance such as power consumption and memory and shooting clarity while meeting user needs, thereby improving customer experience.
  • a method for adjusting the shooting resolution includes:
  • Step S100 acquires ambient brightness and object distance information during shooting.
  • the ambient brightness during shooting is determined according to the read ISO value of the sensitivity of the camera.
  • the ISO value is used to indicate the sensitivity of the camera.
  • the commonly used ISO values are 50, 100, 200, 400, 1000, etc.
  • the camera can automatically adjust the ISO value according to the ambient brightness, so that the ambient brightness can be deduced according to the ISO value.
  • the average pixel brightness of the initial image is averaged to obtain the average pixel brightness, and the ambient brightness can be derived from the average pixel brightness.
  • the initial image is obtained by the camera according to the initial exposure parameters.
  • the object distance information in this embodiment refers to the distance from the object to be photographed to the center of the lens when focusing is achieved.
  • the object distance information during shooting is determined according to the read drive current value of the motor when the camera is in focus.
  • a camera includes a lens, an image sensor, and a motor.
  • the distance between the lens and the image sensor is called the image distance.
  • the image distance is adjusted under the drive of the motor to focus. There is a certain correspondence between the drive current value of the motor and the image distance. The larger the drive current, the greater the image distance.
  • u refers to the object distance, that is, the distance from the object to the center of the lens
  • v refers to the image distance, that is, the distance from the imaging (image sensor) to the center of the lens
  • f refers to the focal length
  • the object distance can be obtained according to the above formula.
  • the corresponding object distance information can be obtained according to the driving current value of the motor when focusing is achieved, which is used as the object distance information in this embodiment.
  • Step S200 determines the shooting resolution according to the ambient brightness and the object distance information.
  • the shooting resolution is divided into a first resolution and a second resolution, and the first resolution is greater than the second resolution, that is, the first resolution is a high resolution, and the second resolution is a low resolution.
  • the first resolution is 2 million pixels
  • the second resolution is 300,000 pixels.
  • the shooting resolution is adjusted to the second resolution; the first brightness threshold is greater than the second brightness threshold.
  • the ambient brightness is less than the second brightness threshold, indicating that the environment is too dark. In a too dark environment, the light is insufficient, and high-resolution photography will produce more noise, resulting in poor imaging results; In the scene, you can set the shooting resolution to low resolution, increase the sensitivity, reduce the noise in the image, and improve the imaging effect.
  • the shooting resolution can be set to a low resolution.
  • the second brightness threshold For example, set the second brightness threshold to 400 and the first brightness threshold to 1300.
  • the shooting resolution is adjusted to the second resolution; when the ambient brightness value BV>1300, the shooting resolution is adjusted to the second resolution.
  • the shooting resolution is adjusted to the first resolution.
  • the ambient brightness is between the first brightness threshold and the second brightness threshold, indicating that the ambient brightness is moderate, and the user may need to take high-definition photos.
  • the shooting resolution is adjusted to the second resolution.
  • the second object distance threshold is smaller than the first object distance threshold. If the object distance information is less than the second object distance threshold, it means that the object to be photographed is close to the lens and belongs to close object shooting. At this time, the field of view is small. At this time, the resolution of high-resolution and low-resolution shooting is equivalent. Considering the low resolution, it can be reduced. Power consumption and memory consumption, so use low-resolution shooting.
  • the resolution can be divided into more files according to actual needs, and the corresponding scene recognition and resolution switching can be done in more detail, which is not limited in this embodiment.
  • the shooting resolution is automatically adjusted according to the ambient brightness and the object distance information, so as to meet the user's use requirements, the performance such as power consumption and memory can be achieved and the shooting resolution can be achieved. balance and enhance the customer experience.
  • a method for adjusting the shooting resolution includes:
  • Step S110 determines the ambient brightness during shooting according to the read ISO value of the sensitivity of the camera.
  • the ISO value is used to indicate the sensitivity of the camera.
  • the camera can automatically adjust the ISO value according to the ambient brightness, so that the ambient brightness can be deduced according to the ISO value.
  • Step S120 determines the object distance information during shooting according to the read drive current value of the motor when the camera is in focus.
  • the object distance information in this embodiment refers to the distance from the object to be photographed to the center of the lens when focusing is achieved.
  • a camera includes a lens, an image sensor, and a motor.
  • the distance between the lens and the image sensor is called the image distance.
  • the image distance is adjusted under the drive of the motor to focus. There is a certain correspondence between the drive current value of the motor and the image distance. The larger the drive current, the greater the image distance.
  • u refers to the object distance, that is, the distance from the object to the center of the lens
  • v refers to the image distance, that is, the distance from the imaging (image sensor) to the center of the lens
  • f refers to the focal length
  • the object distance can be obtained according to the above formula.
  • the corresponding object distance information can be obtained according to the driving current value of the motor when focusing is achieved, which is used as the object distance information in this embodiment.
  • step S210 when the ambient brightness is greater than the first brightness threshold or less than the second brightness threshold, the shooting resolution is adjusted to the second resolution.
  • Step S220 when the ambient brightness is between the first brightness threshold and the second brightness threshold, and the object distance information is greater than the first object distance threshold, adjusting the shooting resolution to the first resolution.
  • step S230 when the object distance information is less than the second object distance threshold, the shooting resolution is adjusted to the second resolution.
  • the object distance information refers to the distance from the object to be photographed to the center of the lens when focusing is achieved.
  • the shooting resolution is divided into a first resolution and a second resolution, and the first resolution is greater than the second resolution, that is, the first resolution is a high resolution, and the second resolution is a low resolution.
  • the first brightness threshold is greater than the second brightness threshold.
  • the shooting resolution selects a low resolution, that is, the second resolution.
  • the shooting resolution is selected at a low resolution, that is, the second resolution.
  • the ambient brightness is between the first brightness threshold and the second brightness threshold, it means that the ambient brightness is moderate, and the user may have a need to take high-definition photos.
  • the first object distance threshold is greater than the second object distance threshold.
  • the object distance information at the time of shooting is greater than the first object distance threshold, it means that the object to be shot is far away from the lens, which belongs to the shooting of a distant object, and the field of view is relatively wide at this time. If the ambient brightness is moderate and the distant object is shot, the high-resolution shooting is relatively low-resolution shooting, and the picture is clearer, so the high-resolution shooting resolution is selected at this time, that is, the first resolution.
  • the object distance information is less than the second object distance threshold, it means that the object to be photographed is close to the lens and belongs to close object shooting. At this time, the field of view is small. At this time, the resolution of high-resolution and low-resolution shooting is equivalent, so the shooting resolution is selected at this time. Low resolution, the second resolution.
  • the resolution of high-resolution and low-resolution shooting is equivalent in close-up shooting, and the high-resolution shooting is clearer in long-range shooting.
  • the shooting resolution is automatically adjusted to achieve a balance between performance such as power consumption and memory and shooting clarity, improving customer experience.
  • a shooting resolution adjustment device 10 includes:
  • the information acquisition module 100 is used for acquiring ambient brightness and object distance information during shooting.
  • the information acquisition module 100 is further configured to determine the ambient brightness during shooting according to the read ISO value of the sensitivity of the camera.
  • the ISO value is used to indicate the sensitivity of the camera.
  • the commonly used ISO values are 50, 100, 200, 400, 1000, etc.
  • the camera can automatically adjust the ISO value according to the ambient brightness, so that the ambient brightness can be deduced according to the ISO value.
  • the information acquisition module 100 averages the brightness of all pixels of the initial image to obtain the average pixel brightness, and deduces the ambient brightness according to the average pixel brightness.
  • the initial image is obtained by the camera according to the initial exposure parameters.
  • the object distance information in this embodiment refers to the distance from the object to be photographed to the center of the lens when focusing is achieved.
  • the information acquisition module 100 is further configured to determine the object distance information during shooting according to the read drive current value of the motor when the camera is in focus.
  • a camera includes a lens, an image sensor, and a motor.
  • the distance between the lens and the image sensor is called the image distance.
  • the image distance is adjusted under the drive of the motor to focus. There is a certain correspondence between the drive current value of the motor and the image distance. The larger the drive current, the greater the image distance.
  • u refers to the object distance, that is, the distance from the object to the center of the lens
  • v refers to the image distance, that is, the distance from the imaging (image sensor) to the center of the lens
  • f refers to the focal length
  • the object distance can be obtained according to the above formula.
  • the corresponding object distance information can be obtained according to the driving current value of the motor when focusing is achieved, which is used as the object distance information in this embodiment.
  • the resolution determination module 200 is configured to determine the shooting resolution according to the ambient brightness and the object distance information.
  • the shooting resolution is divided into a first resolution and a second resolution, and the first resolution is greater than the second resolution, that is, the first resolution is a high resolution, and the second resolution is a low resolution.
  • the first resolution is 2 million pixels
  • the second resolution is 300,000 pixels.
  • the resolution determination module 200 is further configured to adjust the shooting resolution to the second resolution when the ambient brightness is greater than the first brightness threshold or less than the second brightness threshold; the first brightness threshold is greater than the second brightness threshold .
  • the ambient brightness is less than the second brightness threshold, indicating that the environment is too dark.
  • the light is insufficient, and high-resolution cameras will produce more noise, resulting in poor imaging results; in addition, users have low demand for high-definition photos in this scenario, so this In the scene, you can set the shooting resolution to low resolution, increase the sensitivity, reduce the noise in the image, and improve the imaging effect.
  • the shooting resolution can be set to a low resolution.
  • the resolution determination module 200 is further configured to adjust the shooting resolution to the first when the ambient brightness is between the first brightness threshold and the second brightness threshold, and the object distance information is greater than the first object distance threshold. resolution.
  • the ambient brightness is between the first brightness threshold and the second brightness threshold, indicating that the ambient brightness is moderate, and the user may need to take high-definition photos.
  • the resolution determination module 200 is further configured to adjust the shooting resolution to the second resolution when the object distance information is less than the second object distance threshold.
  • the second object distance threshold is smaller than the first object distance threshold.
  • the object distance information is less than the second object distance threshold, it means that the object to be photographed is close to the lens and belongs to close object shooting. At this time, the field of view is small. At this time, the resolution of high-resolution and low-resolution shooting is equivalent. Power consumption and memory consumption, so use low-resolution shooting.
  • the resolution can be divided into more files according to actual needs, and the corresponding scene recognition and resolution switching can be done in more detail, which is not limited in this embodiment.
  • the shooting resolution is automatically adjusted according to the ambient brightness and the object distance information, so as to meet the user's use requirements, the performance such as power consumption and memory can be achieved and the shooting resolution can be achieved. balance and enhance the customer experience.
  • an apparatus 10 for adjusting shooting resolution includes:
  • the information acquisition module 100 is configured to determine the ambient brightness during shooting according to the read ISO value of the sensitivity of the camera.
  • the ISO value is used to indicate the sensitivity of the camera.
  • the camera can automatically adjust the ISO value according to the ambient brightness, so that the ambient brightness can be deduced according to the ISO value.
  • the information acquisition module 100 is further configured to determine the object distance information during shooting according to the read drive current value of the motor when the camera is in focus.
  • the object distance information in this embodiment refers to the distance from the object to be photographed to the center of the lens when focusing is achieved.
  • a camera includes a lens, an image sensor, and a motor.
  • the distance between the lens and the image sensor is called the image distance.
  • the image distance is adjusted under the drive of the motor to focus. There is a certain correspondence between the drive current value of the motor and the image distance. The larger the drive current, the greater the image distance.
  • u refers to the object distance, that is, the distance from the object to the center of the lens
  • v refers to the image distance, that is, the distance from the imaging (image sensor) to the center of the lens
  • f refers to the focal length
  • the object distance can be obtained according to the above formula.
  • the corresponding object distance information can be obtained according to the driving current value of the motor when focusing is achieved, which is used as the object distance information in this embodiment.
  • a resolution determination module 200 configured to adjust the shooting resolution to the second resolution when the ambient brightness is greater than the first brightness threshold or less than the second brightness threshold;
  • the shooting resolution is also used to adjust the shooting resolution to the first resolution when the ambient brightness is between the first brightness threshold and the second brightness threshold, and the object distance information is greater than the first object distance threshold;
  • the shooting resolution is divided into a first resolution and a second resolution, and the first resolution is greater than the second resolution, that is, the first resolution is a high resolution, and the second resolution is a low resolution.
  • the first brightness threshold is greater than the second brightness threshold.
  • the shooting resolution selects a low resolution, that is, the second resolution.
  • the shooting resolution is selected at a low resolution, that is, the second resolution.
  • the ambient brightness is between the first brightness threshold and the second brightness threshold, it means that the ambient brightness is moderate, and the user may have a need to take high-definition photos.
  • the first object distance threshold is greater than the second object distance threshold.
  • the object distance information at the time of shooting is greater than the first object distance threshold, it means that the object to be shot is far away from the lens, which belongs to the shooting of a distant object, and the field of view is relatively wide at this time.
  • the high-resolution shooting is relatively low-resolution shooting, and the picture is clearer, so the high-resolution shooting resolution is selected at this time, that is, the first resolution.
  • the object distance information is less than the second object distance threshold, it means that the object to be photographed is close to the lens and belongs to close object shooting. At this time, the field of view is small. At this time, the resolution of high-resolution and low-resolution shooting is equivalent, so the shooting resolution is selected at this time. Low resolution, the second resolution.
  • the resolution of high-resolution and low-resolution shooting is equivalent in close-up shooting, and the high-resolution shooting is clearer in long-range shooting.
  • the shooting resolution is automatically adjusted to achieve a balance between performance such as power consumption and memory and shooting clarity, improving customer experience.
  • the embodiments of the apparatus for adjusting the photographing resolution provided by the present invention and the embodiments of the method for adjusting the photographing resolution provided above are based on the same inventive concept and can achieve the same technical effect. Therefore, for other specific contents of the embodiment of the apparatus for adjusting the photographing resolution, reference may be made to the description of the contents of the embodiment of the foregoing method for adjusting the photographing resolution.
  • a smart device 20 includes a memory 21 and a processor 22 .
  • the memory 21 is used to store the computer program 23 .
  • the processor 22 executes the computer program 23, the method for adjusting the shooting resolution as described above is realized.
  • processor 21 when the processor 21 executes the computer program, steps S100-S200 according to the foregoing description are implemented. In addition, when the processor 21 executes the computer program, the functions of the respective modules in the apparatus for adjusting the photographing resolution described above are realized. As yet another example, the processor implements the functions of the information acquisition module 100 and the resolution determination module 200 when the processor executes the computer program.
  • the computer program can be divided into one or more modules/units according to the specific needs of accomplishing the present invention.
  • Each module/unit may be a series of computer program instruction segments capable of performing a specified function.
  • the computer program instruction segment is used to describe the execution process of the computer program in the apparatus for adjusting the shooting resolution.
  • the computer program may be divided into individual modules/units in the virtual device, such as an information acquisition module and a resolution determination module.
  • the processor is used for adjusting the shooting resolution by executing the computer program.
  • the processor may be a central processing unit (CPU), a graphics processing unit (GPU), a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), a general purpose processor or other logic devices, etc.
  • the memory may be any internal storage unit and/or external storage device capable of realizing data and program storage.
  • the memory may be a plug-in hard disk, a smart memory card (SMC), a secure digital (SD) card, or a flash memory card.
  • SMC smart memory card
  • SD secure digital
  • flash memory card any type of memory card.
  • the memory is used to store computer programs and data.
  • the smart device 20 may further include input and output devices, display devices, network access devices, and buses.
  • the smart device 20 may also be a single-chip microcomputer, or a computing device integrating a central processing unit (CPU) and a graphics processing unit (GPU).
  • CPU central processing unit
  • GPU graphics processing unit
  • Each unit and module in the above-mentioned embodiments may adopt a separate physical unit, or two or more units and modules may be integrated into one physical unit.
  • the respective units and modules in the foregoing embodiments may use hardware and/or software functional units to implement corresponding functions.
  • the direct coupling, indirect coupling or communication connection between the multiple units, components and modules in the above-mentioned embodiments may be realized through a bus or interface; the coupling and connection between multiple units or devices may be electrical, mechanical or similar way.
  • the specific names of the units and modules in the above-mentioned embodiments are only for the convenience of description and distinction, and are not intended to limit the protection scope of the present application.

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Abstract

本发明提供了一种拍摄分辨率的调整方法及装置、智能设备，包括：获取拍摄时的环境亮度和物距信息；根据所述环境亮度和物距信息确定拍摄分辨率。本发明可在清晰度和功耗内存等性能之间做平衡，对拍摄分辨率进行动态调整，在满足用户的使用前提下，降低功耗和内存。

Description

一种拍摄分辨率的调整方法及装置、智能设备 技术领域
本发明涉及终端设备技术领域，尤指一种拍摄分辨率的调整方法及装置、智能设备。
背景技术
目前，智能手机、智能手表等智能设备为了有更好的拍摄效果，通常都会配一个高分辨率的摄像头。
以智能手表为例，若摄像头始终工作在高分辨率下，虽然能获得高清图片，但需要占用大量内存，影响其他应用的运行；且功耗高，易导致手表电量消耗快。
所以有必要在清晰度和功耗内存等性能之间做平衡，对拍摄分辨率进行动态调整，在满足用户的使用前提下，降低功耗和内存。
发明内容
本发明的目的是提供一种拍摄分辨率的调整方法及装置、智能设备，用于解决现有技术中清晰度和功耗内存之间的不平衡。
本发明提供的技术方案如下：
一种拍摄分辨率的调整方法，包括：获取拍摄时的环境亮度和物距信息；根据所述环境亮度和物距信息确定拍摄分辨率。
进一步地，所述根据所述环境亮度和物距信息确定拍摄分辨率，包括：
当所述环境亮度大于第一亮度门限，或小于第二亮度门限时，将所述拍摄分辨率调整为第二分辨率；所述第一亮度门限大于所述第二亮度门限。
进一步地，所述根据所述环境亮度和物距信息确定拍摄分辨率，还包括：
当所述环境亮度介于第一亮度门限与第二亮度门限之间，且所述物距信息大于第一物距门限时，将所述拍摄分辨率调整为第一分辨率。
进一步地，所述根据所述环境亮度和物距信息确定拍摄分辨率，还包括：
当所述物距信息小于第二物距门限时，将所述拍摄分辨率调整为第二分辨率。
进一步地，所述获取拍摄时的环境亮度包括：
根据读取到的摄像头的感光度ISO值，确定所述环境亮度。
进一步地，所述获取拍摄时的物距信息包括：
根据读取到的摄像头合焦时的马达的驱动电流值，确定所述物距信息。
本发明还提供一种拍摄分辨率的调整装置，包括：
信息获取模块，用于获取拍摄时的环境亮度和物距信息；
分辨率确定模块，用于根据所述环境亮度和物距信息确定拍摄分辨率。
进一步地，所述分辨率确定模块，还用于当所述环境亮度大于第一亮度门限，或小于第二亮度门限时，将所述拍摄分辨率调整为第二分辨率；所述第一亮度门限大于所述第二亮度门限。
进一步地，所述信息获取模块，还用于根据读取到的摄像头合焦时的马达的驱动电流值，确定所述物距信息。
本发明还提供一种智能设备，包括：存储器，用于存储计算机程序；处理器，用于运行所述计算机程序时实现前述的拍摄分辨率的调整方法。
通过本发明提供的一种拍摄分辨率的调整方法及装置、智能设备，至少能够带来以下有益效果：
根据拍摄时的环境亮度和物距信息动态调整拍摄分辨率，可在清晰度和功 耗内存等性能之间做平衡，在满足用户的使用前提下，降低功耗和内存资源占用，提升了客户体验。
附图说明
下面将以明确易懂的方式，结合附图说明优选实施方式，对一种拍摄分辨率的调整方法及装置、智能设备的上述特性、技术特征、优点及其实现方式予以进一步说明。
图1是本发明的一种拍摄分辨率的调整方法的一个实施例的流程图；
图2是本发明的一种拍摄分辨率的调整方法的另一个实施例的流程图；
图3是本发明的一种拍摄分辨率的调整装置的一个实施例的结构示意图；
图4是本发明的一种智能设备的一个实施例的结构示意图。
附图标号说明：
100.信息获取模块，200.分辨率确定模块，20.智能设备，21.存储器，22.处理器，23.计算机程序，10.拍摄分辨率的调整装置。
具体实施方式
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对照附图说明本发明的具体实施方式。显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图，并获得其他的实施方式。
为使图面简洁，各图中只示意性地表示出了与本发明相关的部分，它们并不代表其作为产品的实际结构。另外，以使图面简洁便于理解，在有些图中具有相同结构或功能的部件，仅示意性地绘制了其中的一个，或仅标出了其中的一个。在本文中，“一个”不仅表示“仅此一个”，也可以表示“多于一个”的情形。
现有智能设备通常配有一个高分辨率的摄像头，但若总是使用高清拍摄(即在高分辨率下工作)，易导致设备电量消耗快、内存等资源占用多，影响其他应用的运行。
针对这种情况，可提供两种拍摄模式供用户选择，比如智能拍摄和高清拍摄。高清拍摄，则固定使用高分辨率。智能拍摄，则由设备根据应用场景自动选择拍摄分辨率，这样可以实现拍摄清晰度和功耗内存等性能之间的动态平衡。
通过对用户拍摄场景进行调研，我们发现：在比较暗的环境或户外很亮的环境，客户要求拍摄高清晰度照片的需求较少。室内场景，客户有拍摄文字的需求，对清晰度会有一定的要求。
对此，本发明根据拍摄时的环境亮度和物距信息自动调整拍摄分辨率，在满足用户需求下，实现功耗内存等性能与拍摄清晰度之间的平衡，提升了客户体验。具体参见下面实施例的详细描述。
在本发明的一个实施例，如图1所示，一种拍摄分辨率的调整方法，包括：
步骤S100获取拍摄时的环境亮度和物距信息。
可选地，根据读取到的摄像头的感光度ISO值，确定拍摄时的环境亮度。
ISO值用来指示摄像头的感光度，常用的ISO值有50、100、200、400、1000等，摄像头可以根据环境亮度，自动调节ISO值，从而，可根据ISO值反推出环境亮度。
也可以，对初始图像的所有像素亮度进行求平均，得到平均像素亮度，根据平均像素亮度推出环境亮度。初始图像是摄像头根据初始曝光参数得到的。
拍摄中要进行对焦，通过对焦使被拍摄的物体成像清晰。当成像清晰时，即为合焦。本实施例中的物距信息是指合焦时被拍摄物体到镜头中心的距离。
可选地，根据读取到的摄像头合焦时的马达的驱动电流值，确定拍摄时的物距信息。
摄像头包括镜头、图像传感器和马达。镜头与图像传感器之间的距离称为像距。在马达的驱动下调整像距进行对焦。马达的驱动电流值与像距之间存在一定的对应关系，驱动电流越大像距越大。
像距与物距之间遵循公式：
1/u+1/v＝1/f；
其中，u指物距，即物体到镜头中心的距离；v指像距，即成像(图像传感器)至镜头中心的距离，f指焦距。
在焦距、像距确定下，可根据上述公式得到物距。像距越大，物距越小。
所以可根据合焦时的马达的驱动电流值得到对应的物距信息，将其作为本实施例的物距信息。
步骤S200根据环境亮度和物距信息确定拍摄分辨率。
将拍摄分辨率分为第一分辨率和第二分辨率，第一分辨率大于第二分辨率，即第一分辨率为高分辨率，第二分辨率为低分辨率。比如，第一分辨率为200万像素，第二分辨率为30万像素。
可选地，当环境亮度大于第一亮度门限，或小于第二亮度门限时，将拍摄分辨率调整为第二分辨率；第一亮度门限大于第二亮度门限。
环境亮度小于第二亮度门限，说明环境太暗。在太暗的环境下，光线不足，采用高分辨率摄像，会出现较多的噪声，导致成像效果不佳；另外，用户在这种场景下要求拍摄高清晰度照片的需求低，所以这种场景下，可将拍摄分辨率设为低分辨率，增加感光度，减少图像中的噪声，提高成像效果。
环境亮度大于第一亮度门限，说明环境太亮，比如户外很亮的环境。在太亮的环境下，高分辨率拍摄成像效果也不佳，用户在这种场景下要求拍摄高清晰度照片的需求低，所以这种场景下，可将拍摄分辨率设为低分辨率。
比如，设第二亮度门限为400，第一亮度门限为1300。当环境亮度值BV<400时，将拍摄分辨率调整为第二分辨率；当环境亮度值BV>1300时，将拍摄分辨率调整为第二分辨率。
可选地，当环境亮度介于第一亮度门限与第二亮度门限之间，且物距信息大于第一物距门限时，将拍摄分辨率调整为第一分辨率。
环境亮度介于第一亮度门限与第二亮度门限之间，说明环境亮度适中，用户可能有拍高清晰度照片的需求。此时，再检查物距信息，若物距信息大于第一物距门限，说明被拍摄物距离镜头较远，此时视野比较广，若采用低分辨拍摄将导致图片不清晰，所以改为高分辨(即第一分辨率)拍摄，以增加图片的清晰度。
可选地，当物距信息小于第二物距门限时，将拍摄分辨率调整为第二分辨率。
第二物距门限小于第一物距门限。若物距信息小于第二物距门限，说明被拍摄物距离镜头近，属于近物拍摄，此时视野小，此时高分辨率和低分辨率拍摄清晰度相当，考虑到低分辨率可以降低功耗和内存占用，所以采用低分辨率拍摄。
需要说明的是，可根据实际需要将分辨率分成更多档，对应场景识别和分辨率切换上做得更细致，本实施例对此不做限制。
本实施例，通过将拍摄时的环境亮度和物距信息相结合，根据环境亮度和物距信息自动调整拍摄分辨率，在满足用户使用需求下，实现功耗内存等性能与拍摄清晰度之间的平衡，提升了客户体验。
在本发明的另一个实施例，如图2所示，一种拍摄分辨率的调整方法，包括：
步骤S110根据读取到的摄像头的感光度ISO值，确定拍摄时的环境亮度。
ISO值用来指示摄像头的感光度，摄像头可以根据环境亮度，自动调节ISO值，从而，可根据ISO值反推出环境亮度。
步骤S120根据读取到的摄像头合焦时的马达的驱动电流值，确定拍摄时的物距信息。
拍摄中要进行对焦，通过对焦使被拍摄的物体成像清晰。当成像清晰时，即为合焦。本实施例中的物距信息是指合焦时被拍摄物体到镜头中心的距离。
摄像头包括镜头、图像传感器和马达。镜头与图像传感器之间的距离称为像距。在马达的驱动下调整像距进行对焦。马达的驱动电流值与像距之间存在一定的对应关系，驱动电流越大像距越大。
像距与物距之间遵循公式：
1/u+1/v＝1/f；
其中，u指物距，即物体到镜头中心的距离；v指像距，即成像(图像传感器)至镜头中心的距离，f指焦距。
在焦距、像距确定下，可根据上述公式得到物距。像距越大，物距越小。
所以可根据合焦时的马达的驱动电流值得到对应的物距信息，将其作为本实施例的物距信息。
步骤S210当环境亮度大于第一亮度门限，或小于第二亮度门限时，将拍摄分辨率调整为第二分辨率。
步骤S220当环境亮度介于第一亮度门限与第二亮度门限之间，且物距信息大于第一物距门限时，将拍摄分辨率调整为第一分辨率。
步骤S230当物距信息小于第二物距门限时，将拍摄分辨率调整为第二分辨率。
具体地，物距信息是指合焦时被拍摄物体到镜头中心的距离。
将拍摄分辨率分为第一分辨率和第二分辨率，第一分辨率大于第二分辨率，即第一分辨率为高分辨率，第二分辨率为低分辨率。
第一亮度门限大于第二亮度门限。
若环境亮度小于第二亮度门限，说明环境比较暗。若环境比较暗，在暗环境下难以拍出清晰度很高的照片，用户拍清晰度很高的照片的需求也较低，所以此时拍摄分辨率选择低分辨率，即第二分辨率。
若环境亮度大于第一亮度门限，说明环境太亮。若环境比较亮，太亮环境难以拍出清晰度很高的照片，用户拍清晰度很高的照片的需求也较低，所以此时拍摄分辨率选择低分辨率，即第二分辨率。
若环境亮度介于第一亮度门限与第二亮度门限之间，说明环境亮度适中，用户可能有拍高清晰度照片的需求。
第一物距门限大于第二物距门限。
若拍摄时的物距信息大于第一物距门限说明被拍摄物距离镜头较远，属于远物拍摄，此时视野比较广。若环境亮度适中，且远物拍摄，此时高分辨拍摄相对低分辨拍摄，图片更清晰，所以此时拍摄分辨率选择高分辨率，即第一分辨率。
若物距信息小于第二物距门限，说明被拍摄物距离镜头近，属于近物拍摄，此时视野小，此时高分辨率和低分辨率拍摄清晰度相当，所以此时拍摄分辨率选择低分辨率，即第二分辨率。
在高低分辨率之间切换的时候为了保证图像的流畅性，可预留一定的数据空间。
本实施例，根据太暗或太亮环境下高分辨率拍摄成像效果不佳，近景拍摄时高分辨率和低分辨率拍摄清晰度相当，远景拍摄时高分辨率拍摄更清晰等原则，识别拍摄时的环境亮度和物距信息，自动调整拍摄分辨率，实现功耗内存等性能与拍摄清晰度之间的平衡，提升了客户体验。
在本发明的一个实施例，如图3所示，一种拍摄分辨率的调整装置10，包 括：
信息获取模块100，用于获取拍摄时的环境亮度和物距信息。
可选地，信息获取模块100，还用于根据读取到的摄像头的感光度ISO值，确定拍摄时的环境亮度。
ISO值用来指示摄像头的感光度，常用的ISO值有50、100、200、400、1000等，摄像头可以根据环境亮度，自动调节ISO值，从而，可根据ISO值反推出环境亮度。
也可以，信息获取模块100对初始图像的所有像素亮度进行求平均，得到平均像素亮度，根据平均像素亮度推出环境亮度。初始图像是摄像头根据初始曝光参数得到的。
拍摄中要进行对焦，通过对焦使被拍摄的物体成像清晰。当成像清晰时，即为合焦。本实施例中的物距信息是指合焦时被拍摄物体到镜头中心的距离。
可选地，信息获取模块100，还用于根据读取到的摄像头合焦时的马达的驱动电流值，确定拍摄时的物距信息。
摄像头包括镜头、图像传感器和马达。镜头与图像传感器之间的距离称为像距。在马达的驱动下调整像距进行对焦。马达的驱动电流值与像距之间存在一定的对应关系，驱动电流越大像距越大。
像距与物距之间遵循公式：
1/u+1/v＝1/f；
其中，u指物距，即物体到镜头中心的距离；v指像距，即成像(图像传感器)至镜头中心的距离，f指焦距。
在焦距、像距确定下，可根据上述公式得到物距。像距越大，物距越小。
所以可根据合焦时的马达的驱动电流值得到对应的物距信息，将其作为本实施例的物距信息。
分辨率确定模块200，用于根据环境亮度和物距信息确定拍摄分辨率。
具体地，将拍摄分辨率分为第一分辨率和第二分辨率，第一分辨率大于第二分辨率，即第一分辨率为高分辨率，第二分辨率为低分辨率。比如，第一分辨率为200万像素，第二分辨率为30万像素。
可选地，分辨率确定模块200，还用于当环境亮度大于第一亮度门限，或小于第二亮度门限时，将拍摄分辨率调整为第二分辨率；第一亮度门限大于第二亮度门限。
环境亮度小于第二亮度门限，说明环境太暗。在太暗的环境下，光线不足，采用高分辨率摄像，会出现较多的噪声，导致成像效果不佳；另外，用户在这种场景下要求拍摄高清晰度照片的需求低，所以这种场景下，可将拍摄分辨率设为低分辨率，增加感光度，减少图像中的噪声，提高成像效果。
环境亮度大于第一亮度门限，说明环境太亮，比如户外很亮的环境。在太亮的环境下，高分辨率拍摄成像效果也不佳，用户在这种场景下要求拍摄高清晰度照片的需求低，所以这种场景下，可将拍摄分辨率设为低分辨率。
可选地，分辨率确定模块200，还用于当环境亮度介于第一亮度门限与第二亮度门限之间，且物距信息大于第一物距门限时，将拍摄分辨率调整为第一分辨率。
环境亮度介于第一亮度门限与第二亮度门限之间，说明环境亮度适中，用户可能有拍高清晰度照片的需求。此时，再检查物距信息，若物距信息大于第一物距门限，说明被拍摄物距离镜头较远，此时视野比较广，若采用低分辨拍摄将导致图片不清晰，所以改为高分辨(即第一分辨率)拍摄，以增加图片的清晰度。
可选地，分辨率确定模块200，还用于当物距信息小于第二物距门限时，将拍摄分辨率调整为第二分辨率。
第二物距门限小于第一物距门限。
若物距信息小于第二物距门限，说明被拍摄物距离镜头近，属于近物拍摄， 此时视野小，此时高分辨率和低分辨率拍摄清晰度相当，考虑到低分辨率可以降低功耗和内存占用，所以采用低分辨率拍摄。
需要说明的是，可根据实际需要将分辨率分成更多档，对应场景识别和分辨率切换上做得更细致，本实施例对此不做限制。
本实施例，通过将拍摄时的环境亮度和物距信息相结合，根据环境亮度和物距信息自动调整拍摄分辨率，在满足用户使用需求下，实现功耗内存等性能与拍摄清晰度之间的平衡，提升了客户体验。
在本发明的另一个实施例，如图3所示，一种拍摄分辨率的调整装置10，包括：
信息获取模块100，用于根据读取到的摄像头的感光度ISO值，确定拍摄时的环境亮度。
ISO值用来指示摄像头的感光度，摄像头可以根据环境亮度，自动调节ISO值，从而，可根据ISO值反推出环境亮度。
信息获取模块100，还用于根据读取到的摄像头合焦时的马达的驱动电流值，确定拍摄时的物距信息。
拍摄中要进行对焦，通过对焦使被拍摄的物体成像清晰。当成像清晰时，即为合焦。本实施例中的物距信息是指合焦时被拍摄物体到镜头中心的距离。
摄像头包括镜头、图像传感器和马达。镜头与图像传感器之间的距离称为像距。在马达的驱动下调整像距进行对焦。马达的驱动电流值与像距之间存在一定的对应关系，驱动电流越大像距越大。
像距与物距之间遵循公式：
1/u+1/v＝1/f；
其中，u指物距，即物体到镜头中心的距离；v指像距，即成像(图像传感器)至镜头中心的距离，f指焦距。
在焦距、像距确定下，可根据上述公式得到物距。像距越大，物距越小。
所以可根据合焦时的马达的驱动电流值得到对应的物距信息，将其作为本实施例的物距信息。
分辨率确定模块200，用于当环境亮度大于第一亮度门限，或小于第二亮度门限时，将拍摄分辨率调整为第二分辨率；
还用于当环境亮度介于第一亮度门限与第二亮度门限之间，且物距信息大于第一物距门限时，将拍摄分辨率调整为第一分辨率；
还用于当物距信息小于第二物距门限时，将拍摄分辨率调整为第二分辨率。
具体地，将拍摄分辨率分为第一分辨率和第二分辨率，第一分辨率大于第二分辨率，即第一分辨率为高分辨率，第二分辨率为低分辨率。
第一亮度门限大于第二亮度门限。
若环境亮度小于第二亮度门限，说明环境比较暗。若环境比较暗，在暗环境下难以拍出清晰度很高的照片，用户拍清晰度很高的照片的需求也较低，所以此时拍摄分辨率选择低分辨率，即第二分辨率。
若环境亮度大于第一亮度门限，说明环境太亮。若环境比较亮，太亮环境难以拍出清晰度很高的照片，用户拍清晰度很高的照片的需求也较低，所以此时拍摄分辨率选择低分辨率，即第二分辨率。
若环境亮度介于第一亮度门限与第二亮度门限之间，说明环境亮度适中，用户可能有拍高清晰度照片的需求。
第一物距门限大于第二物距门限。
若拍摄时的物距信息大于第一物距门限说明被拍摄物距离镜头较远，属于远物拍摄，此时视野比较广。
若环境亮度适中，且远物拍摄，此时高分辨拍摄相对低分辨拍摄，图片更清晰，所以此时拍摄分辨率选择高分辨率，即第一分辨率。
若物距信息小于第二物距门限，说明被拍摄物距离镜头近，属于近物拍摄，此时视野小，此时高分辨率和低分辨率拍摄清晰度相当，所以此时拍摄分辨率选择低分辨率，即第二分辨率。
在高低分辨率之间切换的时候为了保证图像的流畅性，可预留一定的数据空间。
本实施例，根据太暗或太亮环境下高分辨率拍摄成像效果不佳，近景拍摄时高分辨率和低分辨率拍摄清晰度相当，远景拍摄时高分辨率拍摄更清晰等原则，识别拍摄时的环境亮度和物距信息，自动调整拍摄分辨率，实现功耗内存等性能与拍摄清晰度之间的平衡，提升了客户体验。
需要说明的是，本发明提供的拍摄分辨率的调整装置的实施例与前述提供的拍摄分辨率的调整方法的实施例均基于同一发明构思，能够取得相同的技术效果。因而，拍摄分辨率的调整装置的实施例的其它具体内容可以参照前述拍摄分辨率的调整方法的实施例内容的记载。
在本发明的一个实施例，如图4所示，一种智能设备20，包括存储器21、处理器22。
存储器21用于存储计算机程序23。处理器22运行计算机程序23时实现如前述记载的拍摄分辨率的调整方法。
作为一个示例，处理器21执行计算机程序时实现根据前述记载的步骤S100-S200。另外地，处理器21执行计算机程序时实现前述记载的拍摄分辨率的调整装置中的各模块的功能。作为又一个示例，所述处理器执行计算机程序时实现信息获取模块100、分辨率确定模块200的功能。
可选地，根据完成本发明的具体需要，所述计算机程序可以被分割为一个或多个模块/单元。每个模块/单元可以为能够完成特定功能的一系列计算机程序指令段。该计算机程序指令段用于描述所述计算机程序在拍摄分辨率的调整 装置中的执行过程。
作为示例，所述计算机程序可以被分割为虚拟装置中的各个模块/单元，譬如信息获取模块和分辨率确定模块。
所述处理器用于通过执行所述计算机程序从而实现拍摄分辨率的调整。根据需要，所述处理器可以是中央处理单元(CPU)、图形处理单元(GPU)、数字信号处理器(DSP)、专用集成电路(ASIC)、现场可编程门阵列(FPGA)、通用处理器或其他逻辑器件等。
所述存储器可以为任意能够实现数据、程序存储的内部存储单元和/或外部存储设备。譬如，所述存储器可以为插接式硬盘、智能存储卡(SMC)、安全数字(SD)卡或闪存卡等。所述存储器用于存储计算机程序及数据。
根据需要，所述智能设备20还可以包括输入输出设备、显示设备、网络接入设备及总线等。
所述智能设备20还可以是单片机，或集成了中央处理单元(CPU)及图形处理单元(GPU)的计算设备。
本领域技术人员可以理解的是，上述用于实现相应功能的单元、模块的划分是出于便利于说明、叙述的目的，根据应用需求，将上述单元、模块做进一步的划分或者组合，即将装置/设备的内部结构重新进行划分、组合，以实现的上述记载的功能。
上述实施例的各个单元、模块可以分别采用单独的物理单元，也可以将两个或两个以上的单元、模块集成在一个物理单元。上述实施例的各个单元、模块可以采用硬件和/或软件功能单元的实现对应的功能。上述实施例的多个单元、组件、模块之间可以的直接耦合、间接耦合或通讯连接可以通过总线或者接口实现；多个单元或装置的之间的耦合、连接，可以是电性、机械或类似的方式。相应地，上述实施例的各个单元、模块的具体名称也只是为了便于叙述及区分，并不用限制本申请的保护范围。
应当说明的是，上述实施例均可根据需要自由组合。以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。

Claims (10)

  1. 一种拍摄分辨率的调整方法，其特征在于，包括：
    获取拍摄时的环境亮度和物距信息；
    根据所述环境亮度和物距信息确定拍摄分辨率。
  2. 根据权利要求1所述的拍摄分辨率的调整方法，其特征在于，所述根据所述环境亮度和物距信息确定拍摄分辨率，包括：
    当所述环境亮度大于第一亮度门限，或小于第二亮度门限时，将所述拍摄分辨率调整为第二分辨率；所述第一亮度门限大于所述第二亮度门限。
  3. 根据权利要求1所述的拍摄分辨率的调整方法，其特征在于，所述根据所述环境亮度和物距信息确定拍摄分辨率，还包括：
    当所述环境亮度介于第一亮度门限与第二亮度门限之间，且所述物距信息大于第一物距门限时，将所述拍摄分辨率调整为第一分辨率。
  4. 根据权利要求1所述的拍摄分辨率的调整方法，其特征在于，所述根据所述环境亮度和物距信息确定拍摄分辨率，还包括：
    当所述物距信息小于第二物距门限时，将所述拍摄分辨率调整为第二分辨率。
  5. 根据权利要求1所述的拍摄分辨率的调整方法，其特征在于，所述获取拍摄时的环境亮度包括：
    根据读取到的摄像头的感光度ISO值，确定所述环境亮度。
  6. 根据权利要求1所述的拍摄分辨率的调整方法，其特征在于，所述获 取拍摄时的物距信息包括：
    根据读取到的摄像头合焦时的马达的驱动电流值，确定所述物距信息。
  7. 一种拍摄分辨率的调整装置，其特征在于，包括：
    信息获取模块，用于获取拍摄时的环境亮度和物距信息；
    分辨率确定模块，用于根据所述环境亮度和物距信息确定拍摄分辨率。
  8. 根据权利要求7所述的拍摄分辨率的调整装置，其特征在于：
    所述分辨率确定模块，还用于当所述环境亮度大于第一亮度门限，或小于第二亮度门限时，将所述拍摄分辨率调整为第二分辨率；所述第一亮度门限大于所述第二亮度门限。
  9. 根据权利要求7所述的拍摄分辨率的调整装置，其特征在于：
    所述信息获取模块，还用于根据读取到的摄像头合焦时的马达的驱动电流值，确定所述物距信息。
  10. 一种智能设备，其特征在于，包括：
    存储器，用于存储计算机程序；
    处理器，用于运行所述计算机程序时实现根据权利要求1至6中任一项所述的拍摄分辨率的调整方法。
PCT/CN2021/097176 2021-04-27 2021-05-31 一种拍摄分辨率的调整方法及装置、智能设备 WO2022227200A1 (zh)

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