CN103002199A - Camera-module-based image acquisition method and device and mobile terminal - Google Patents
Camera-module-based image acquisition method and device and mobile terminal Download PDFInfo
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- CN103002199A CN103002199A CN201210401745XA CN201210401745A CN103002199A CN 103002199 A CN103002199 A CN 103002199A CN 201210401745X A CN201210401745X A CN 201210401745XA CN 201210401745 A CN201210401745 A CN 201210401745A CN 103002199 A CN103002199 A CN 103002199A
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Abstract
An embodiment of the invention provides camera-module-based image acquisition method and device and a mobile terminal. A camera module comprises a lens and an optical sensor. The method includes: locating an image acquisition center; and acquiring an image according to the image acquisition center, wherein a coordinate of the image acquisition center is the coordinate of an intersection of the optical sensor with an optical central axis of the lens. The method is used to reduce color shift and nonuniform brightness of the acquired image due to shifting of the lens optical center and the optical sensor center, and the image quality is improved.
Description
Technical field
The embodiment of the invention relates to the camera technique field, particularly relates to a kind of method that gathers image based on camera module, a kind of based on camera module gather image device and, a kind of portable terminal.
Background technology
Along with digital camera, hand-held digital camera device etc. are constantly popularized and are used, and for the user has brought facility in shooting and photography, thereby this type of hand-held digital camera equipment is used widely.
In the hand-held digital camera device, along with the continuous lifting of user to image quality, come the inlet of light in the increasing hand-held digital camera device with larger aperture, therefore the optical centre axle of the center of optical sensor and camera lens will require to keep in the assembling process coaxial as far as possible, obtain better image effect, reduce because both centers do not overlap the image aberration that causes, the phenomenon of brightness irregularities.
In existing each camera module assembling process, general known calibrating mode is to utilize alignment pin, and optical sensor is fixed in a picture plane device in the lens barrel structure.Yet in senior slr camera system, because camera lens can be changed, therefore in structure, need more somewhat complex design.For example can by the alignment pin on four corners, accurately optical sensor be arranged on the picture plan position approach.Also can by regulating the relative physical location of optical sensor and camera lens, realize the as far as possible consistent of optical sensor center and optical center in addition.But in present hand-held digital camera device, optical sensor center and optical center are fixing, and above method can't satisfy in the situation that physical structure has fixedly been carried out the correction of optical sensor center and optical center.
Summary of the invention
Embodiment of the invention technical problem to be solved provides a kind of method that gathers image based on camera module, a kind of device that gathers image based on camera module, and, a kind of portable terminal, in order to reduce because the colour cast of obtaining image that the skew at lens optical center and optical sensor center brings, the phenomenon of brightness irregularities improves picture quality.
In order to address the above problem, the embodiment of the invention discloses a kind of method that gathers image based on camera module, described camera module comprises camera lens and optical sensor, described method comprises:
The central point that positioning image gathers, the coordinate of the central point of described IMAQ are the coordinate of the intersection point of the optical centre axle of camera lens and optical sensor;
Central point based on described IMAQ gathers image.
Preferably, the optical centre axle of the center of optical sensor and camera lens is default fixed position in the described camera module.
Preferably, the step of the central point of described positioning image collection comprises:
Obtain evenly to take in the formed reference picture of directional light of camera module;
Obtain the coordinate of the pixel of brightness maximum on the described reference picture, i.e. the coordinate of the intersection point of the optical centre axle of camera lens and optical sensor;
Central point according to the described IMAQ of described coordinate setting.
Preferably, the step of described central point according to the described IMAQ of coordinate setting is:
Valid pixel to the output of the image pixel of optical sensor arranges, so that the coordinate of the central point of IMAQ moves to the coordinate of the intersection point of the optical centre axle of camera lens and optical sensor from the coordinate at the center of optical sensor.
The embodiment of the invention also discloses a kind of device that gathers image based on camera module, described camera module comprises camera lens and optical sensor, and described device comprises:
The location of the core module is used for the central point that positioning image gathers, and the coordinate of the central point of described IMAQ is the coordinate of the intersection point of the optical centre axle of camera lens and optical sensor;
Image capture module is used for gathering image based on the central point of described IMAQ.
Preferably, the optical centre axle of the center of optical sensor and camera lens is default fixed position in the described camera module.
Preferably, described location of the core module comprises:
Reference picture obtains submodule, is used for obtaining evenly to take in the formed reference picture of directional light of camera module;
Intersecting point coordinate obtains submodule, is used for obtaining the coordinate of the pixel of brightness maximum on the described reference picture, i.e. the coordinate of the intersection point of the optical centre axle of camera lens and optical sensor;
The location of the core submodule is used for the central point according to the described IMAQ of described coordinate setting.
Preferably, described location of the core submodule is used for the valid pixel of the image pixel output of optical sensor is arranged, so that the coordinate of the central point of IMAQ moves to the coordinate of the intersection point of the optical centre axle of camera lens and optical sensor from the coordinate at the center of optical sensor.
The embodiment of the invention also discloses a kind of portable terminal, described portable terminal comprises camera module, and described camera module comprises camera lens and optical sensor, and described portable terminal comprises:
The location of the core module is used for the central point that positioning image gathers, and the coordinate of the central point of described IMAQ is the coordinate of the intersection point of the optical centre axle of camera lens and optical sensor;
Image capture module is used for gathering image based on the central point of described IMAQ.
Compared with prior art, the embodiment of the invention comprises following advantage:
The embodiment of the invention is the optical centre axle of camera lens and the coordinate of optical sensor intersection point by the coordinate setting with the central point of IMAQ, in order to reduce because the colour cast of obtaining image that the skew at the optical centre axle of camera lens and optical sensor center brings, the phenomenon of brightness irregularities, the optical centre axle of camera lens of image and the center of optical sensor are united two into one, improve picture quality.
Description of drawings
Fig. 1 is a kind of flow chart of steps that gathers the embodiment of the method for image based on camera module of the embodiment of the invention;
Fig. 2 is the structural representation of a kind of camera module of the embodiment of the invention;
Fig. 3 is a kind of schematic diagram of correcting front camera module photographic images of the embodiment of the invention;
Fig. 4 is a kind of schematic diagram of correcting rear camera module photographic images of the embodiment of the invention;
Fig. 5 is a kind of structured flowchart that gathers the device embodiment of image based on camera module of the embodiment of the invention;
Fig. 6 is the structured flowchart of a kind of portable terminal embodiment of the embodiment of the invention.
Embodiment
For above-mentioned purpose, the feature and advantage that make the embodiment of the invention can become apparent more, below in conjunction with the drawings and specific embodiments the embodiment of the invention is described in further detail.
One of core idea of the embodiment of the invention is, be the optical centre axle of camera lens and the coordinate of optical sensor intersection point by the coordinate setting with the central point of IMAQ, in order to reduce because the colour cast of obtaining image that the skew at the optical centre axle of camera lens and optical sensor center brings, the phenomenon of brightness irregularities, the optical centre axle of camera lens of image and the center of optical sensor are united two into one, improve picture quality.
With reference to Fig. 1, show a kind of method that gathers image based on camera module of the embodiment of the invention, described camera module can comprise camera lens and optical sensor, described method can may further comprise the steps:
The central point that step 101, positioning image gather, the coordinate of the central point of described IMAQ are the coordinate of the intersection point of the optical centre axle of camera lens and optical sensor;
In a kind of preferred embodiment of the embodiment of the invention, the optical centre axle of the center of optical sensor and camera lens can be default fixed position in the described camera module.
With reference to Fig. 2, be depicted as the structural representation of a kind of camera module of the embodiment of the invention, camera lens and optical sensor all can be default fixing position.Comprise camera lens 100 in the camera module, the optical centre axle 200 of camera lens, optical sensor 300, the optical centre axle of the center 500 of optical sensor and the camera lens of camera module and the intersection point 400 of optical sensor.
In a kind of preferred embodiment of the embodiment of the invention, described step 101 specifically can comprise following substep:
Substep S11 obtains the evenly formed reference picture of directional light of absorption camera module;
Substep S12 obtains the coordinate of the pixel of brightness maximum on the reference picture, i.e. the coordinate of the intersection point of the optical centre axle of camera lens and optical sensor;
Substep S13 is according to the central point of the described IMAQ of described coordinate setting.
In a kind of preferred embodiment of the embodiment of the invention, described substep S13 can for:
Valid pixel to the output of the image pixel of optical sensor arranges, so that the coordinate of the central point of IMAQ moves to the coordinate of the intersection point of the optical centre axle of camera lens and optical sensor from the coordinate at the center of optical sensor.
The embodiment of the invention utilizes directional light that existing camera module is carried out IMAQ, because the characteristics of the brightness uniformity of camera lens itself are constantly to decay with concentric circles brightness to peripheral with the optical centre axle 200 of camera lens, the brightness that is concentrically ringed center is the brightest, and ambient light brightness decays dimmed gradually.Therefore, with the coordinate of the central point of the IMAQ coordinate by the center 500 of the central point optical sensor of the IMAQ of acquiescence, transfer to the coordinate of the intersection point 400 of the optical centre axle of camera lens and optical sensor, can make the integral image brightness of obtaining even, improve the quality of image.
The coordinate at the center 500 of optical sensor is the central point of the IMAQ of acquiescence, the embodiment of the invention is with reference to the coordinate of the pixel of brightness maximum on the image, be the optical centre axle of camera lens and the coordinate of optical sensor intersection point 400, the coordinate of the IMAQ center light center sensor 500 of acquiescence on the instead of optical transducer 300, arrange by the valid pixel that the image pixel of optical sensor 300 is exported, move to the optical centre axle of camera lens and the coordinate of optical sensor intersection point 400 so that gather the position coordinates of the central point of image.Like this by the setting to optical sensor 300, so that lens optical center and optical sensor intersection point 400 become the center of entire image.
In order to make those skilled in the art further understand the embodiment of the invention, describe below by concrete example.
With reference to Fig. 3, be depicted as a kind of image schematic diagram of correcting front camera module shooting of the embodiment of the invention, before not yet correcting, uniform light is taken in optical sensor 300 by camera lens 100, and maximum in the brightness number of the optical centre axle of camera lens and optical sensor intersection point 400, then centered by the optical centre axle and optical sensor intersection point 400 of camera lens, spread to the periphery according to concentric circles, brightness weakens gradually.
With reference to Fig. 4, be depicted as a kind of image schematic diagram that rear camera module is taken of correcting of the present invention, at first obtain the optical centre axle of camera lens and the coordinate of optical sensor intersection point 400 by camera module.Secondly, the coordinate of lens optical center and optical sensor intersection point 400, the IMAQ center of instead of optical transducer 300 acquiescences, the center 500 of optical sensor, namely the valid pixel of the image pixel of optical sensor 300 output arranged, so that obtain the coordinate that its centre coordinate of center of image moves to lens optical center and optical sensor intersection point 400.Like this by the setting to optical sensor 300, so that lens optical center and optical sensor intersection point 400 become the center of entire image.Fig. 4 is presented at after the optical sensor setting, again the directional light of incident camera module is taken the associated picture that obtains.Through overcorrect, the coordinate setting of the central point of IMAQ is center and the optical centre axle of camera lens and the coordinate of optical sensor intersection point 400 of optical sensor, so that the optical sensor center 500 of the image that shooting is obtained and the optical centre axle 200 of camera lens unite two into one, greatly reduced because the colour cast of obtaining image that the skew at two centers brings the phenomenon of brightness irregularities.Especially the camera module that forms for optical sensor 300 and camera lens 100, its relative position structurally fixing can not the change situation under, realize that the optical centre axle 200 of optical sensor center 500 and camera lens unites two into one, greatly improved the quality of image.
Need to prove, for embodiment of the method, for simple description, therefore it all is expressed as a series of combination of actions, but those skilled in the art should know, the embodiment of the invention is not subjected to the restriction of described sequence of movement, because according to the embodiment of the invention, some step can adopt other orders or carry out simultaneously.Secondly, those skilled in the art also should know, the embodiment described in the specification all belongs to preferred embodiment, and related action might not be that the embodiment of the invention is necessary.
With reference to Fig. 5, show a kind of device that gathers image based on camera module of the embodiment of the invention, described camera module can comprise camera lens and optical sensor, described device can comprise:
Location of the core module 201 is used for the central point that positioning image gathers, and the coordinate of the central point of described IMAQ is the coordinate of the intersection point of the optical centre axle of camera lens and optical sensor;
In a kind of preferred embodiment of the embodiment of the invention, the optical centre axle of the center of optical sensor and camera lens can be default fixed position in the described camera module.
In a kind of preferred embodiment of the embodiment of the invention, described location of the core module 201 can comprise:
Reference picture obtains submodule, is used for obtaining evenly to take in the formed reference picture of directional light of camera module;
Intersecting point coordinate obtains submodule, is used for obtaining the coordinate of the pixel of brightness maximum on the reference picture, i.e. the coordinate of the intersection point of the optical centre axle of camera lens and optical sensor;
The location of the core submodule is used for the central point according to the described IMAQ of described coordinate setting.
In a kind of preferred embodiment of the embodiment of the invention, described location of the core submodule can be used for arranging the valid pixel of the image pixel output of optical sensor, so that the coordinate of the central point of IMAQ moves to the coordinate of the intersection point of the optical centre axle of camera lens and optical sensor from the coordinate at the center of optical sensor.
Because the embodiment of described device is substantially corresponding to preceding method embodiment, therefore not detailed part in the description of the present embodiment can referring to the related description in the previous embodiment, just not given unnecessary details at this.
With reference to Fig. 6, show the structured flowchart of a kind of portable terminal of the embodiment of the invention, described portable terminal 30 can comprise camera module, and described camera module can comprise camera lens and optical sensor, and described portable terminal can comprise:
The central point that the location of the core module 301 of IMAQ, positioning image gather, the coordinate of the central point of described IMAQ are the coordinate of the intersection point of the optical centre axle of camera lens and optical sensor;
Because the embodiment of described portable terminal is substantially corresponding to preceding method embodiment, therefore not detailed part in the description of the present embodiment can referring to the related description in the previous embodiment, just not given unnecessary details at this.
Each embodiment in this specification all adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.
Those skilled in the art should understand, embodiments of the invention can be provided as method, device or computer program.Therefore, the present invention can adopt complete hardware implementation example, complete implement software example or in conjunction with the form of the embodiment of software and hardware aspect.And the present invention can adopt the form of the computer program of implementing in one or more computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) that wherein include computer usable program code.
The present invention is that reference is described according to flow chart and/or the block diagram of method, equipment (system) and the computer program of the embodiment of the invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block diagram and/or square frame and flow chart and/or the block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device producing a machine, so that the instruction of carrying out by the processor of computer or other programmable data processing device produces the device that is used for realizing in the function of flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, so that the instruction that is stored in this computer-readable memory produces the manufacture that comprises command device, this command device is realized the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded on computer or other programmable data processing device, so that carry out the sequence of operations step producing computer implemented processing at computer or other programmable devices, thereby be provided for realizing the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame in the instruction that computer or other programmable devices are carried out.
Although described the preferred embodiments of the present invention, in a single day those skilled in the art get the basic creative concept of cicada, then can make other change and modification to these embodiment.So claims are intended to all changes and the modification that are interpreted as comprising preferred embodiment and fall into the scope of the invention.
At last, also need to prove, in this article, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby not only comprise those key elements so that comprise process, method, article or the equipment of a series of key elements, but also comprise other key elements of clearly not listing, or also be included as the intrinsic key element of this process, method, article or equipment.In the situation that not more restrictions, the key element that is limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises described key element and also have other identical element.
Above a kind of method that gathers image based on camera module that the embodiment of the invention is provided, a kind of device that gathers image based on camera module, and, a kind of portable terminal.Be described in detail, used specific case herein principle and the execution mode of the embodiment of the invention are set forth, the explanation of above embodiment just is used for helping to understand method and the core concept thereof of the embodiment of the invention; Simultaneously, for one of ordinary skill in the art, the thought according to the embodiment of the invention all will change in specific embodiments and applications, and in sum, this description should not be construed as the restriction to the embodiment of the invention.
Claims (9)
1. a method that gathers image based on camera module is characterized in that, described camera module comprises camera lens and optical sensor, and described method comprises:
The central point that positioning image gathers, the coordinate of the central point of described IMAQ are the coordinate of the intersection point of the optical centre axle of camera lens and optical sensor;
Central point based on described IMAQ gathers image.
2. method according to claim 1 is characterized in that, the optical centre axle of the center of optical sensor and camera lens is default fixed position in the described camera module.
3. method according to claim 1 and 2 is characterized in that, the step of the central point of described positioning image collection comprises:
Obtain evenly to take in the formed reference picture of directional light of camera module;
Obtain the coordinate of the pixel of brightness maximum on the described reference picture, the coordinate of the pixel of described brightness maximum is the coordinate of the intersection point of the optical centre axle of camera lens and optical sensor;
Central point according to the described IMAQ of described coordinate setting.
4. method according to claim 3 is characterized in that, the step of described central point according to the described IMAQ of coordinate setting is:
Valid pixel to the output of the image pixel of optical sensor arranges, so that the coordinate of the central point of IMAQ moves to the coordinate of the intersection point of the optical centre axle of camera lens and optical sensor from the coordinate at the center of optical sensor.
5. a device that gathers image based on camera module is characterized in that, described camera module comprises camera lens and optical sensor, and described device comprises:
The location of the core module is used for the central point that positioning image gathers, and the coordinate of the central point of described IMAQ is the coordinate of the intersection point of the optical centre axle of camera lens and optical sensor;
Image capture module is used for gathering image based on the central point of described IMAQ.
6. device according to claim 5 is characterized in that, the optical centre axle of the center of optical sensor and camera lens is default fixed position in the described camera module.
7. according to claim 5 or 6 described devices, it is characterized in that, described location of the core module comprises:
Reference picture obtains submodule, is used for obtaining evenly to take in the formed reference picture of directional light of camera module;
Intersecting point coordinate obtains submodule, is used for obtaining the coordinate of the pixel of brightness maximum on the described reference picture, and the coordinate of the pixel of described brightness maximum is the coordinate of the intersection point of the optical centre axle of camera lens and optical sensor;
The location of the core submodule is used for the central point according to the described IMAQ of described coordinate setting.
8. device according to claim 7, it is characterized in that, described location of the core submodule is used for the valid pixel of the image pixel output of optical sensor is arranged, so that the coordinate of the central point of IMAQ moves to the coordinate of the intersection point of the optical centre axle of camera lens and optical sensor from the coordinate at the center of optical sensor.
9. a portable terminal is characterized in that, described portable terminal comprises camera module, and described camera module comprises camera lens and optical sensor, and described portable terminal comprises:
The location of the core module is used for the central point that positioning image gathers, and the coordinate of the central point of described IMAQ is the coordinate of the intersection point of the optical centre axle of camera lens and optical sensor;
Image capture module is used for gathering image based on the central point of described IMAQ.
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| CN201210401745XA CN103002199A (en) | 2012-10-19 | 2012-10-19 | Camera-module-based image acquisition method and device and mobile terminal |
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| CN201210401745XA CN103002199A (en) | 2012-10-19 | 2012-10-19 | Camera-module-based image acquisition method and device and mobile terminal |
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| CN106683135A (en) * | 2015-11-09 | 2017-05-17 | 宁波舜宇光电信息有限公司 | Method for searching optic center of lens |
| CN107690656A (en) * | 2017-09-13 | 2018-02-13 | 深圳市汇顶科技股份有限公司 | Detect the method, apparatus and electronic equipment of optics module |
| CN108040249A (en) * | 2017-11-24 | 2018-05-15 | 深圳市比亚迪电子部品件有限公司 | A kind of camera optical centre calibration jig |
| CN110519508A (en) * | 2015-02-02 | 2019-11-29 | 宁波舜宇光电信息有限公司 | A method of identification feature object during camera module automatic aligning |
| CN114422676A (en) * | 2022-01-17 | 2022-04-29 | 广州市奥威亚电子科技有限公司 | Parameter recording method and device and vignetting adjusting method and device for camera module |
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