WO2016119150A1 - Procédé de photographie pour un terminal mobile ayant plusieurs appareils photographiques, et terminal mobile - Google Patents

Procédé de photographie pour un terminal mobile ayant plusieurs appareils photographiques, et terminal mobile Download PDF

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Publication number
WO2016119150A1
WO2016119150A1 PCT/CN2015/071769 CN2015071769W WO2016119150A1 WO 2016119150 A1 WO2016119150 A1 WO 2016119150A1 CN 2015071769 W CN2015071769 W CN 2015071769W WO 2016119150 A1 WO2016119150 A1 WO 2016119150A1
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WO
WIPO (PCT)
Prior art keywords
focal length
camera
image
mobile terminal
effective focal
Prior art date
Application number
PCT/CN2015/071769
Other languages
English (en)
Chinese (zh)
Inventor
陈能
王强
Original Assignee
宇龙计算机通信科技(深圳)有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 宇龙计算机通信科技(深圳)有限公司 filed Critical 宇龙计算机通信科技(深圳)有限公司
Priority to PCT/CN2015/071769 priority Critical patent/WO2016119150A1/fr
Publication of WO2016119150A1 publication Critical patent/WO2016119150A1/fr

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Classifications

    • 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
    • H04N23/69—Control of means for changing angle of the field of view, e.g. optical zoom objectives or electronic zooming

Definitions

  • the present invention relates to the field of photographing, and in particular to a photographing method and a mobile terminal of a mobile terminal having multiple cameras.
  • the camera is already standard on the mobile terminal, and the shooting effect has become one of the important performances of the mobile terminal.
  • the optical zoom lens is not suitable for increasingly thin mobile terminals.
  • the camera of the mobile terminal usually adopts a fixed focus camera, that is, has a fixed effective focal length (EFL: Effective Focal Length) and the field of view (FOV: Field Of View) lens.
  • ENL Effective Focal Length
  • FOV Field Of View
  • the mobile terminal adopts a digital zoom function.
  • Digital zoom When the camera obtains an image, the local data of the image is retrieved and enlarged by an interpolation algorithm to obtain an effect similar to optical zoom.
  • digital zoom uses the same focal length to describe the effect of digital zoom.
  • the effective focal length of the lens is 2.4mm, and after 2x digital zoom, an image obtained with a lens with a focal length of 4.8mm will be obtained.
  • the digital zoom reduces the image quality, and the larger the ratio of the equivalent focal length after the digital zoom is enlarged to the effective focal length of the corresponding lens, the worse the image quality obtained. Therefore, in order to ensure the quality of the output image, the mobile terminal currently uses only a narrow zoom interval.
  • a main object of the present invention is to provide a photographing method and a mobile terminal of a mobile terminal having a multi-camera, aiming at ensuring an output image quality while widening a zoom section.
  • the present invention provides a method for photographing a mobile terminal having a multi-camera, and the photographing method of the mobile terminal having a multi-camera includes the following steps:
  • the mobile terminal When the mobile terminal outputs the control information that enlarges the output image by the target focal length when outputting according to the first image captured by the first camera, it is determined whether the target focal length is less than, equal to, or greater than the effective focal length of the second camera, wherein The effective focal length of the second camera is greater than the effective focal length of the first camera;
  • the acquired second image is subjected to digital zoom processing, and a second processed image having an equivalent focal length of the target focal length is obtained and output.
  • the mobile terminal outputs the image to a display screen, a storage device or an external device.
  • the method further comprises the steps of:
  • the first processed image and the second processed image are obtained, and the first processed image and the second processed image are combined and output;
  • the acquired second image is subjected to digital zoom processing to obtain and output a second processed image having an equivalent focal length of the target focal length.
  • the effective focal length of the second camera is twice the effective focal length of the first camera, and the preset threshold is 2.
  • the mobile terminal determines whether the target focal length is less than, equal to, or greater than the effective focal length of the third camera, wherein the effective focal length of the third camera is greater than the effective focal length of the second camera;
  • the third processed image is an image with an equivalent focal length obtained from the third image as a target focal length.
  • the other processed image is an image obtained from an image captured by another camera and having an equivalent focal length as the target focal length;
  • the mobile terminal includes a multi-camera, and the mobile terminal further includes:
  • a first determining module configured to: when the mobile terminal outputs the control information that enlarges the output image by the target focal length when outputting the first image captured by the first camera, determine whether the target focal length is less than, equal to, or greater than An effective focal length of the second camera, wherein an effective focal length of the second camera is greater than an effective focal length of the first camera;
  • a first amplifying module configured to perform digital zoom processing on the acquired first image when the first determining module determines to be smaller, and obtain and output a first processed image whose equivalent focal length is the target focal length;
  • a second straight out module configured to acquire a second image captured by the second camera and output when the first determining module determines to be equal to
  • the second amplifying module is configured to perform digital zoom processing on the acquired second image when the first determining module determines to be greater than, and obtain and output a second processed image whose equivalent focal length is the target focal length.
  • the mobile terminal outputs the image to a display screen, a storage device or an external device.
  • the mobile terminal further includes:
  • a threshold module configured to determine whether a ratio of the target focal length to an effective focal length of the second camera exceeds a preset threshold
  • a synthesis output module configured to: when the threshold module determines that the threshold value is exceeded, obtain the first processed image and the second processed image, and combine the first processed image and the second processed image to output;
  • the second amplifying module is further configured to perform digital zoom processing on the acquired second image when the threshold module determines that the threshold value is not exceeded, and obtain and output a second processing with an equivalent focal length as the target focal length image.
  • the effective focal length of the second camera is twice the effective focal length of the first camera, and the preset threshold is 2.
  • the mobile terminal further includes a third camera; the mobile terminal further includes:
  • a second determining module configured to determine whether the target focal length is less than, equal to, or greater than an effective focal length of the third camera, wherein an effective focal length of the third camera is greater than an effective focal length of the second camera;
  • a third straight out module configured to acquire a third image captured by the third camera and output when the second determining module determines to be equal to;
  • a third amplification module configured to output a third processed image or combine the third processed image with another processed image after the second determining module determines that the second processing module is greater than
  • the equivalent focal length obtained by the three images is an image of the target focal length
  • the other processed images are images obtained by the equivalent focal length obtained according to the images captured by other cameras as the target focal length
  • the threshold module is further configured to determine whether a ratio of the target focal length to the effective focal length of the second camera exceeds a preset threshold when the second determining module determines to be less than.
  • the photographing method and the mobile terminal of the mobile terminal with multi-camera provided by the present invention by setting the cameras with different effective focal lengths, and digitally zooming or switching the cameras according to different target focal lengths, the mobile terminal using the fixed focus camera has both
  • the digital zoom effect has an optical zoom effect, which allows the mobile terminal to ensure image quality while having a wide zoom range.
  • FIG. 1 is a schematic flow chart of a first embodiment of a method for photographing a mobile terminal having multiple cameras according to the present invention
  • FIG. 2 is a schematic flow chart of a second embodiment of a method for photographing a mobile terminal having multiple cameras according to the present invention
  • FIG. 3 is a schematic flow chart of a third embodiment of a method for photographing a mobile terminal having multiple cameras according to the present invention.
  • FIG. 4 is a schematic block diagram of an embodiment of a mobile terminal according to the present invention.
  • the present invention provides a photographing method and a mobile terminal of a mobile terminal having multiple cameras.
  • FIG. 1 is a schematic flow chart of a first embodiment of a method for photographing a mobile terminal having multiple cameras according to the present invention.
  • the mobile terminal includes multiple cameras, and the effective focal length of each camera of the mobile terminal is different from the effective focal length of other cameras.
  • the shooting method of the mobile terminal having multiple cameras includes the following steps:
  • step S100 the mobile terminal outputs an image according to the first image captured by the first camera.
  • the first camera is one of a plurality of cameras, and the first camera may be a default camera.
  • the default first lens will be used for shooting.
  • the camera of the mobile terminal adopts a fixed focus camera, so the first camera will always shoot with its effective focal length, and cannot be optically zoomed.
  • the mobile terminal outputs a first image captured by the first camera; when performing amplification, an image with an equivalent focal length greater than the effective focal length of the first camera is obtained after digital zooming according to the first image, and then output .
  • Step S200 when the mobile terminal receives the control information for amplifying the output image by the target focal length, determining whether the target focal length is less than, equal to, or greater than the effective focal length of the second camera, wherein the effective focal length of the second camera is greater than the The effective focal length of the first camera; if it is less, step S300 is performed; if it is equal to, step S400 is performed; if it is greater, step S500 is performed.
  • Step S300 performing digital zoom processing on the acquired first image, and obtaining and outputting a first processed image whose equivalent focal length is the target focal length.
  • Step S400 acquiring a second image captured by the second camera and outputting.
  • Step S500 performing digital zoom processing on the acquired second image, and obtaining and outputting a second processed image having an equivalent focal length of the target focal length.
  • the control information may be input by the input device or may be spontaneous by the system of the mobile terminal. Since the camera of the mobile terminal is a fixed focus camera, it is necessary to perform digital zoom processing on the picture obtained by the camera to meet the requirement of outputting images with different target focal lengths.
  • the effective focal length of the first camera As 2.4 mm and the effective focal length of the second camera as 4.8 mm as an example.
  • the target focal length is 3.6 mm
  • the first image captured by the first camera is subjected to digital zoom processing to generate a first processed image having an equivalent focal length of 3.6 mm, and then the first processing is performed. Image output.
  • the target focal length becomes 4.8 mm
  • the effective focal length of the second camera is also 4.8 mm
  • the second image captured by the second camera is directly outputted and the captured second image is directly output. Since when the mobile terminal is switched from the first camera to the second camera, it is equivalent to optical zooming, thereby having better output image quality.
  • the second image is captured by the second camera, and the second image is digitally zoomed to generate a second processed image having an equivalent focal length of 6 mm, and then the second processing is performed.
  • Image output When it is required to output an image with a target focal length of 6 mm, the second image is captured by the second camera, and the second image is digitally zoomed to generate a second processed image having an equivalent focal length of 6 mm, and then the second processing is performed.
  • Image output is
  • the shooting method of the mobile terminal with multiple cameras provides a digital zoom or a camera switching according to different target focal lengths by setting a camera with different effective focal lengths.
  • the mobile terminal using the fixed focus camera has both a digital zoom effect and an optical zoom effect, thereby enabling the mobile terminal to ensure image quality while having a wide zoom range.
  • the mobile terminal may output the image to a display for preview, output to a storage device, or to an external device that has established a connection.
  • FIG. 2 is a schematic flow chart of a second embodiment of a method for photographing a mobile terminal having multiple cameras according to the present invention.
  • the embodiment is based on the first embodiment, and steps S600 and S700 are added. Specifically, after determining that the target focal length is greater than the effective focal length of the second camera in step S200:
  • step S600 it is determined whether the ratio of the target focal length to the effective focal length of the second camera exceeds a preset threshold; if yes, step S700 is performed; if not, step S500 is performed.
  • Step S700 Obtain the first processed image and the second processed image, and combine the first processed image and the second processed image to output.
  • the threshold value is set in this embodiment.
  • the first processed image and the second processed image are combined to obtain a clearer image and then output, thereby improving the quality of the output image.
  • the threshold is set to 2; also to avoid poor quality of the first processed image of the output, preferably, the effective focal length of the second camera is twice that of the first camera.
  • the threshold is set to 9.6 mm.
  • FIG. 3 is a schematic flowchart diagram of a third embodiment of a method for photographing a mobile terminal having multiple cameras according to the present invention.
  • This embodiment is based on the second embodiment, and steps S800, S900, and S1000 are added. Specifically, after determining in step S200 that the target focal length is greater than the effective focal length of the second camera:
  • step S800 the mobile terminal determines whether the target focal length is less than, equal to, or greater than the effective focal length of the third camera, wherein the effective focal length of the third camera is greater than the effective focal length of the second camera; if equal, step S900 is performed. If it is greater, step S1000 is performed; if it is less, step S600 is performed.
  • Step S900 acquiring a third image captured by the third camera and outputting.
  • step S1000 the third processed image is output or the third processed image is combined with other processed images and output.
  • the third processed image is an image with an equivalent focal length obtained from the third image as a target focal length
  • the other processed images are equivalent focal lengths obtained according to images captured by other cameras as the target focal length Image.
  • the other processed image may be a first processed image obtained according to the first camera, a second processed image obtained according to the second camera, and of course may be other processing obtained according to other cameras than the first camera and the second camera. image.
  • the composite output is performed; otherwise, the third processed image may be directly output.
  • the mobile terminal when the target focal length is equal to the third camera, the mobile terminal will switch to the third camera. Since the target focal length is equal to the third camera, the digital zoom function is not used, which is equivalent to the optical zoom of the mobile terminal, and the quality of the output image is better. It can be understood that the more the cameras, the smaller the difference in the effective focal length between the cameras, the better the image quality output during the entire zooming process. When the difference of the effective focal lengths between the cameras is large, a plurality of processed images may be combined and outputted, and the image quality output during the zooming process may be better.
  • the invention also provides a mobile terminal.
  • FIG. 4 is a schematic diagram of a module of an embodiment of a mobile terminal according to the present invention.
  • the mobile terminal 10 includes a plurality of cameras 101, and the effective focal lengths of the cameras 101 of the mobile terminal 10 are different.
  • the mobile terminal 10 further includes:
  • the first determining module 102 is configured to: when the mobile terminal receives the control information that enlarges the output image by the target focal length when outputting the first image captured by the first camera, determine whether the target focal length is less than, equal to, or greater than An effective focal length of the second camera, wherein an effective focal length of the second camera is greater than an effective focal length of the first camera.
  • the first camera is one of the plurality of cameras 101, and the first camera may be a default camera.
  • the default first lens will be used for shooting.
  • the camera of the mobile terminal adopts a fixed focus camera, so the first camera will always shoot with its effective focal length, and cannot be optically zoomed.
  • the mobile terminal outputs a first image captured by the first camera; when performing amplification, an image with an equivalent focal length greater than the effective focal length of the first camera is obtained after digital zooming according to the first image, and then output .
  • the first amplifying module 103 is configured to perform digital zoom processing on the acquired first image when the first determining module 102 determines that it is smaller, and obtain and output a first processed image whose equivalent focal length is the target focal length.
  • the second straight-out module 104 is configured to acquire the second image captured by the second camera 102 and output when the first determining module 102 determines that it is equal to.
  • the second amplifying module 105 is configured to perform digital zoom processing on the acquired second image when the first determining module 102 determines to be greater than, and obtain and output a second processed image with an equivalent focal length of the target focal length.
  • the control information may be input by the input device or may be spontaneous by the system of the mobile terminal. Since the camera of the mobile terminal is a fixed focus camera, it is necessary to perform digital zoom processing on the picture obtained by the camera to meet the requirement of outputting images with different target focal lengths.
  • the effective focal length of the first camera as 2.4 mm and the effective focal length of the second camera as 4.8 mm as an example.
  • the target focal length is 3.6 mm
  • the first image captured by the first camera is subjected to digital zoom processing to generate a first processed image having an equivalent focal length of 3.6 mm, and then the first processing is performed. Image output.
  • the target focal length becomes 4.8 mm
  • the effective focal length of the second camera is also 4.8 mm
  • the second image is captured by the second camera, and the captured second image is directly output.
  • the mobile terminal switches from the first camera to the second camera, it is equivalent to optical zooming, thereby having better output image quality.
  • the second image is captured by the second camera, and the second image is digitally zoomed to generate a second processed image having an equivalent focal length of 6 mm, and then the second processing is performed.
  • Image output When it is required to output an image with a target focal length of 6 mm, the second image is captured by the second camera, and the second image is digitally zoomed to generate a second processed image having an equivalent focal length of 6 mm, and then the second processing is performed.
  • Image output is
  • the shooting method of the mobile terminal with multiple cameras provides a digital zoom or a camera switching according to different target focal lengths by setting a camera with different effective focal lengths.
  • the mobile terminal using the fixed focus camera has both a digital zoom effect and an optical zoom effect, thereby enabling the mobile terminal to ensure image quality while having a wide zoom range.
  • the mobile terminal may output the image to a display on a display screen, output to a storage device, or transmit to an external device that has established a connection.
  • the mobile terminal 10 further includes:
  • the threshold module 106 is configured to determine whether a ratio of the target focal length to the effective focal length of the second camera 102 exceeds a preset threshold.
  • the composite output module 107 is configured to: when the threshold module 106 determines that the threshold value is exceeded, obtain the first processed image and the second processed image, and combine the first processed image and the second processed image to output.
  • the second amplifying module 105 is further configured to perform digital zoom processing on the acquired second image when the threshold module 106 determines that the threshold is not exceeded, and obtain and output an equivalent focal length as the target focal length. Second, the image is processed.
  • the threshold value is set in this embodiment.
  • the first processed image and the second processed image are combined to obtain a clearer image and then output, thereby improving the quality of the output image.
  • the threshold is set to 2; also to avoid poor quality of the first processed image of the output, preferably, the effective focal length of the second camera 102 is twice that of the first camera 101.
  • the threshold is set to 9.6 mm.
  • the mobile terminal 10 further includes a third camera; the mobile terminal 10 further includes:
  • the second determining module 108 is configured to determine whether the target focal length is less than, equal to, or greater than an effective focal length of the third camera, wherein an effective focal length of the third camera is greater than an effective focal length of the second camera.
  • the third straight-out module 109 is configured to acquire a third image captured by the third camera and output the second determination module 108 when it is determined to be equal.
  • the third amplifying module 110 is configured to output a third processed image or combine the third processed image with other processed images after the second determining module determines to be greater than the output.
  • the third processed image is an image with an equivalent focal length obtained from the third image as a target focal length
  • the other processed images are equivalent focal lengths obtained according to images captured by other cameras as the target focal length
  • the image, the other processed image may be the first processed image obtained according to the first camera, the second processed image obtained according to the second camera, and of course may be obtained according to other cameras than the first camera and the second camera.
  • Other processing images Preferably, when it is determined that the ratio of the target focal length to the effective focal length of the second camera exceeds a corresponding threshold, the composite output is performed; otherwise, the third processed image may be directly output.
  • the threshold module 106 is further configured to determine whether a ratio of the target focal length to the effective focal length of the second camera 102 exceeds a preset threshold when the second determining module 108 determines to be less than.
  • the mobile terminal when the target focal length is equal to the third camera, the mobile terminal will switch to the third camera. Since the target focal length is equal to the third camera, the digital zoom function is not used, which is equivalent to the optical zoom of the mobile terminal, and the quality of the output image is better. It can be understood that the more the cameras, the smaller the difference in the effective focal length between the cameras, the better the image quality output during the entire zooming process. When the difference of the effective focal lengths between the cameras is large, a plurality of processed images may be combined and outputted, and the image quality output during the zooming process may be better.

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Abstract

L'invention se rapporte à un procédé de photographie pour un terminal mobile ayant plusieurs appareils photographiques ainsi qu'à un terminal mobile, la distance focale réelle de chaque appareil photographique du terminal mobile étant différente de celle d'un autre appareil photographique. Selon le procédé de photographie destiné à un terminal mobile ayant plusieurs appareils photographiques : lorsque le terminal mobile émet une image conformément à une première image capturée par un premier appareil photographique, il est déterminé si une distance focale cible est inférieure, égale ou supérieure à la distance focale réelle d'un second appareil photographique au moment où le terminal mobile reçoit des informations de commande pour agrandir l'image de sortie en fonction de la distance focale cible ; si la distance focale cible est inférieure à la distance focale réelle du second appareil photographique, un traitement de zoom numérique est réalisé sur la première image acquise afin d'obtenir et d'émettre une première image traitée ayant une distance focale équivalente identique à la distance focale cible ; si la distance focale cible est égale à la distance focale réelle du second appareil photographique, une seconde image capturée par le second appareil photographique est acquise et émise ; et si la distance focale cible est supérieure à la distance focale réelle du second appareil photographique, un traitement de zoom numérique est réalisé sur la seconde image acquise dans le but d'obtenir et d'émettre une seconde image traitée ayant une distance focale équivalente identique à la distance focale cible. La présente invention a pour effet d'élargir l'intervalle de zoom tout en garantissant la qualité de l'image de sortie.
PCT/CN2015/071769 2015-01-28 2015-01-28 Procédé de photographie pour un terminal mobile ayant plusieurs appareils photographiques, et terminal mobile WO2016119150A1 (fr)

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CN109036365A (zh) * 2018-08-15 2018-12-18 浙江大丰实业股份有限公司 基于观众人数解析的反声罩控制系统
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CN111787224A (zh) * 2020-07-10 2020-10-16 深圳传音控股股份有限公司 图像的获取方法、终端设备和计算机可读存储介质
CN112866576A (zh) * 2021-01-18 2021-05-28 Oppo广东移动通信有限公司 图像预览方法、存储介质及显示设备

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US20140192137A1 (en) * 2013-01-04 2014-07-10 Samsung Electronics Co., Ltd. Video communication method and electronic device for processing method thereof
CN103856719A (zh) * 2014-03-26 2014-06-11 深圳市金立通信设备有限公司 一种拍照方法及终端
CN103986867A (zh) * 2014-04-24 2014-08-13 宇龙计算机通信科技(深圳)有限公司 一种图像拍摄终端和图像拍摄方法
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109036365A (zh) * 2018-08-15 2018-12-18 浙江大丰实业股份有限公司 基于观众人数解析的反声罩控制系统
CN109036365B (zh) * 2018-08-15 2022-07-05 浙江大丰实业股份有限公司 基于观众人数解析的反声罩控制系统
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CN111787224A (zh) * 2020-07-10 2020-10-16 深圳传音控股股份有限公司 图像的获取方法、终端设备和计算机可读存储介质
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CN112866576B (zh) * 2021-01-18 2022-05-17 Oppo广东移动通信有限公司 图像预览方法、存储介质及显示设备

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