CN104980644A - Shooting method and device - Google Patents
Shooting method and device Download PDFInfo
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- CN104980644A CN104980644A CN201410146913.4A CN201410146913A CN104980644A CN 104980644 A CN104980644 A CN 104980644A CN 201410146913 A CN201410146913 A CN 201410146913A CN 104980644 A CN104980644 A CN 104980644A
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Abstract
The invention provides a shooting method, which is applied to a terminal. The shooting method comprises the following steps: starting a camera to acquire an image, and displaying the acquired preview image, wherein the camera comprises at least two optical lenses which are not synchronously positioned in an image acquisition light path; receiving a focal length switching command; moving a first lens which is positioned in the image acquisition light path in the at least two optical lenses out of the image acquisition light path according to the focal length switching command, and moving a second lens which is not positioned in the image acquisition light path in the two optical lenses into the image acquisition light path; performing transition processing on the preview image through digital zooming in a focal length switching period; and outputting a shooting command after the completion of focal length switching, and performing shooting operation through the second lens.
Description
Technical field
The present invention relates to technical field of media, particularly relate to a kind of image pickup method and device.
Background technology
Along with widely using of mobile terminal, terminal use more and more uses the mobile terminals such as mobile phone to take pictures to replace digital camera, makes mobile terminal become conventional capture apparatus in people's daily life.When taking far-end scenery with mobile terminal, because scenery proportion in picture in distant place is very little, does not meet user and taking demand, the zoom system, pancreatic system during user often uses mobile terminal to take pictures carries out zoom, amplifies scenery at a distance.
When existing mobile terminal is taken pictures, due to eyeglass restriction, often can only go to calculate with digital zoom for long-range objectives, amplify scenery at a distance.Digital zoom uses " interpolation " process means to do a part of pixel on image sensor to amplify by being, thus visually allows user only see the local of scenery, reaches the visual effect of zoom.But because real focal length does not change, so resolution and picture quality are relative to poor under normal circumstances.A small amount of digital zoom is not obvious on picture quality impact, but the digital zoom of more than 2 times can to quality influence comparatively greatly and picture quality is deteriorated rapidly.
As shown in Figure 1, in prior art, the eyeglass with optical zoom function is directly installed on mobile phone terminal, the optical zoom function of eyeglass is utilized to amplify scenery at a distance, due in the eyeglass of optical zoom, the position of eyeglass and photo-sensitive cell needs to change, so eyeglass is needing certain space along shooting direction, causing the camera eyeglass volume on the general mobile terminal of the volume ratio of optical zoom eyeglass much bigger thus.Which increase thickness and the weight of mobile phone, reduce the portability of the mobile terminals such as mobile phone.
Summary of the invention
The embodiment of the present invention provides a kind of image pickup method and device, to improve resolution and the picture quality of terminal taking image while ensureing the terminal portability such as mobile phone.
First aspect, the invention provides a kind of image pickup method, is applied to terminal, comprising: start camera and carry out IMAQ, and show the preview image of described collection; Described camera comprise at least two different time be arranged in the optical mirror slip of IMAQ light path;
Receive focal length switching command;
According to described focal length switching command, the first eyeglass being arranged in described IMAQ light path in described at least two optical mirror slips is shifted out described IMAQ light path, and the second eyeglass not being arranged in described IMAQ light path in described at least two optical mirror slips is moved into described IMAQ light path;
During described focal length switches, by digital zoom, transition processing is carried out to described preview image;
Described focal length has switched rear output shooting instruction, carries out shooting operation by described second eyeglass.
In conjunction with first aspect, in the first possible implementation of first aspect, by described digital zoom and described deformation process, transition processing is carried out to described preview image and specifically comprises:
Based on the image that described first eyeglass gathers, by digital zoom, described image is amplified, by deformation process, described image is out of shape; When the focal length of described digital zoom differs the first predetermined threshold value with between the focal length of described second eyeglass, and when differing the second predetermined threshold value between the strain image image corresponding with described second eyeglass, eyeglass in described IMAQ light path switches to described second eyeglass by described first eyeglass, thus completes described transition processing.
In conjunction with the first possible implementation of first aspect or first aspect, in the implementation that the second of first aspect is possible, after described startup camera carries out IMAQ, before receiving focal length switching command, described method also comprises: receive and once take instruction and taken by described first eyeglass, and receive described focal length switching command in Preset Time after described shooting completes.
In conjunction with the implementation that the second of first aspect is possible, in the third possible implementation of first aspect, described method also comprises, and carries out image co-registration by the image obtained by described first eyeglass shooting with by the image that described second eyeglass shooting obtains.
In conjunction with the third possible implementation of first aspect, in the 4th kind of possible implementation of first aspect, described will by described first eyeglass shooting obtain image and by described second eyeglass shooting obtain image carry out image co-registration, specifically comprise:
Demarcate based on the same coordinate system by the described image by described first eyeglass shooting acquisition with by the image that described second eyeglass shooting obtains, obtain uncalibrated image;
Calculate the described image by described first eyeglass shooting acquisition by described uncalibrated image and taken the digital conversion model of the image obtained by described second eyeglass;
Merge by the described image by described first eyeglass shooting acquisition with by the image that described second eyeglass shooting obtains according to described digital variation model.
Second aspect, the invention provides a kind of camera terminal, is applied to terminal, comprising: lenz disc; Described lenz disc comprises the optical mirror slip that at least two have different focal respectively, and at least two described optical mirror slips are arranged on described lenz disc by focal length size along same horizontal plane successively;
Driver module; Described driver module is connected with described lenz disc, for driving described lenz disc, so that the first eyeglass being arranged in described IMAQ light path at least two optical mirror slips described in being arranged on described lenz disc is shifted out described IMAQ light path, and the second eyeglass in described at least two optical mirror slips is moved into described IMAQ light path;
Imageing sensor, is arranged in described IMAQ light path for the light be incident on this imageing sensor through described IMAQ light path is converted to view data;
Display screen, for obtaining the view data that described image sensor obtains, and generates preview image according to described view data;
Digital zoom module, when carrying out eyeglass switching for driving described lenz disc at described driver module, carries out transition processing by digital zoom to described preview image;
Taking module, for exporting shooting instruction after described switching completes, carries out shooting operation by described second eyeglass.
In conjunction with second aspect, in the first possible implementation of second aspect, described digital zoom module specifically for:
Based on the image that described first eyeglass gathers, by digital zoom, described image is amplified, by deformation process, deformation is carried out to described image; When the focal length of described digital zoom differs the first predetermined threshold value with between the focal length of described second eyeglass, and when differing the second predetermined threshold value between the strain image image corresponding with described second eyeglass, eyeglass in described IMAQ light path switches to described second eyeglass by described first eyeglass, thus completes described transition processing.
In conjunction with in the first possible implementation of second aspect or second aspect, in the implementation that the second of second aspect is possible, described lenz disc is rotating disk, at least two described optical mirror slips are arranged in on the pivot of the described rotating disk annulus that is the center of circle, the center of circle of wherein said at least two optical mirror slips is dropped on described with on the pivot of the described rotating disk annulus that is the center of circle, and being arranged in order from small to large with focal length.
In conjunction with second aspect to any one implementation in the possible implementation of the second of second aspect, in the third possible implementation of second aspect, described lenz disc is sliding plate, at least two described optical mirror slips are arranged on the sliding trace of described sliding plate, the center of circle of wherein said at least two optical mirror slips is dropped on the central shaft of the sliding trace of described sliding plate, and being arranged in order from small to large with focal length.
In conjunction with second aspect to any one implementation in the third possible implementation of second aspect, in the 4th kind of possible implementation of second aspect, described taking module also for, after described startup camera carries out IMAQ, before receiving focal length switching command, receive and once take instruction and taken by described first eyeglass, and receive described focal length switching command in Preset Time after described shooting completes.
In conjunction with the 4th kind of possible implementation of second aspect, in the 5th kind of possible implementation of second aspect, described device also comprises: image co-registration module, for carrying out image co-registration by the image obtained by described first eyeglass shooting with by the image that described second eyeglass shooting obtains.
In conjunction with the 5th kind of possible implementation of second aspect, in the 6th kind of possible implementation of second aspect, described image co-registration module comprises:
Demarcating unit, for demarcating based on the same coordinate system by the described image by described first eyeglass shooting acquisition with by the image that described second eyeglass shooting obtains, obtaining uncalibrated image;
Computing unit, takes the image obtained and the digital conversion model being taken the image obtained by described second eyeglass by described first eyeglass described in being calculated by described uncalibrated image;
Integrated unit, for merging by the described image by described first eyeglass shooting acquisition with by the image that described second eyeglass shooting obtains according to described digital variation model.
Embodiments of the invention aim to provide a kind of photographic schemes, to solve the zoom problem in mobile terminal shooting process, make to carry out seamless zoom between the eyeglass of different focal while guarantee mobile terminal convenience, the preview image of collection are stablized clear
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the pictorial diagram of prior art;
Fig. 2 is the schematic diagram of prior art;
The schematic flow sheet of a kind of image pickup method that Fig. 3 provides for the embodiment of the present invention;
Another schematic flow sheet of a kind of image pickup method that Fig. 4 provides for the embodiment of the present invention;
Another schematic flow sheet of a kind of image pickup method that Fig. 5 provides for the embodiment of the present invention;
The scaling board exemplary plot of the scaling method that Fig. 6 provides for the embodiment of the present invention;
The shooting picture exemplary plot of the camera lens one in the scaling method that Fig. 7 provides for the embodiment of the present invention;
The shooting picture exemplary plot of the camera lens two in the scaling method that Fig. 8 provides for the embodiment of the present invention;
The structure chart of a kind of filming apparatus that Fig. 9 provides for the embodiment of the present invention;
Another structure chart of a kind of filming apparatus that Figure 10 provides for the embodiment of the present invention;
The entity exemplary plot of a kind of filming apparatus that Figure 11 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Technology described herein may be used for various terminal, such as mobile phone, camera, personal digital assistant PDA(Personal Digital Assistant), notebook computer, and other are with the similar terminal installation of camera.
Term " shooting " one word related to herein can be understood as on current techniques basis takes pictures and makes a video recording.
Term " zoom " for a change focal length related to herein, it is the fixing optical mirror slip of focal length that term " focuses eyeglass ".
In optical field, " zoom " is divided into " optical zoom " and " digital zoom " (also claiming " Digital Zoom "), as shown in Figure 2, optical zoom passes through eyeglass, the position of object and photo-sensitive cell tripartite changes and realizes, when the distance of eyeglass and photo-sensitive cell changes time, visual angle and focal length will change, make scenery at a distance also can be very clear, so we can see, some slr cameras, eyeglass and the photoreceptor mobile space of its longer then its inside of eyeglass are larger, thus make zoom magnification also larger, just can photograph farther view.The characteristic of " optical zoom " is: the resolution that can not change picture in zooming procedure, also remains unchanged for the value describing picture.Digital zoom is by the processor in digital camera, each elemental area in picture is increased, thus reach amplification object, this gimmick is as with image processing software, the area of picture changed greatly, but program is carried out in digital camera, original CCD(charge coupled cell) a part of pixel on image sensor uses " interpolation " process means to do to amplify, picture is amplified to whole picture by the pixel interpolation algorithm on CCD image sensor, and in fact Digital Zoom does not change the focal length of eyeglass.Different from optical zoom, Digital Zoom is in the change upwards of sensor devices vertical direction, and gives Zoom effect, and by Digital Zoom, the scenery of shooting is exaggerated, but its definition has decline to a certain degree.
Embodiments of the invention aim to provide a kind of photographic schemes, to solve the zoom problem in mobile terminal shooting process, make to carry out seamless zoom between the eyeglass of different focal while guarantee mobile terminal convenience, the preview image of collection is stablized clear.
As shown in Figure 3, embodiments provide a kind of many eyeglasses image pickup method 100, described many eyeglasses image pickup method comprises the steps:
S101, starts camera and carries out IMAQ, and show the preview image of described collection; Described camera comprise at least two different time be arranged in the optical mirror slip of IMAQ light path.
S103, receives focal length switching command.
S105, according to described focal length switching command, the first eyeglass being arranged in described IMAQ light path in described at least two optical mirror slips is shifted out described IMAQ light path, and the second eyeglass not being arranged in described IMAQ light path in described at least two optical mirror slips is moved into described IMAQ light path.
S107, carries out transition processing by digital zoom to described preview image during described focal length switches.
S109, described focal length has switched rear output shooting instruction, carries out shooting operation by described second eyeglass.
Concrete, the camera started on terminal equipment carries out IMAQ, on the terminal equipment being equipped with display screen, this start-up operation can trigger current the gathered preview image of this display screen display simultaneously, this preview image is the realtime graphic presented by display screen that camera absorbs in shooting process, this camera comprise at least two there is different focal respectively focus optical mirror slip.
When user needs to carry out zoom on the basis of the current residing focal length of camera, the optical mirror slip that focuses of different focal is switched.Namely the second eyeglass that the first eyeglass being arranged in described IMAQ light path from above-mentioned at least two optical mirror slips is not arranged in described IMAQ light path to above-mentioned at least two optical mirror slips switches, to change the shooting focal length of described IMAQ.Such as, can switch to the focus lenses larger than the focal length of current lens on the basis of current lens focal length when needing to become large focal length, can switch to the focus lenses less than the focal length of current lens on the basis of current lens focal length when needing to diminish focal length, shooting focal length when changing IMAQ with this.
As mentioned above, when user carries out zoom, eyeglass focuses between optical mirror slip in difference and switches, due at least two have respectively different focal focus optical mirror slip mutually between focal length be difficult to accomplish seamless continuous print, therefore in order to ensure the continuity of described at least two preview images presented when there is different focal focus during optical mirror slip is in switching respectively, need to be processed by digital zoom the image that current lens gathers before switching eyeglass.Optionally, here can also by digital zoom to current lens take image to process while deformation process is done to this image, because different focal focus except image that image that optical mirror slip collects causes except the difference by focal length varies in size, also likely cause having between gathered image trickle distortion because of the difference of eyeglass, in order to not make the change of this image size and anamorphose when two eyeglasses carry out switching saltus step, what present is too lofty, because need namely to make the change of image be gentle transition state by digital zoom and deformation process before eyeglass switches saltus step, until the difference being changed to and being about between the image corresponding to eyeglass that switches to is very trickle, or time identical, just there is the switching saltus step of essence in optical mirror slip, thus make whole handoff procedure gather image in the progressively mild state changed, preview image saltus step is lofty to be unlikely to that user is felt.
The present embodiment focuses eyeglass for what adopt three different focal, and suppose that the focal length of eyeglass 1 is fl1, the focal length of eyeglass 2 is fl2, and the focal length of eyeglass 3 is fl3, and fl1<fl2<fl3, then when user amplifies zoom, when focal length is between fl1 and fl2, based on the image that system is taken by eyeglass 1, digital zoom is used to carry out transition processing to the live preview image presented, also the image can taken this eyeglass 1 while described above carries out deformation process progressively, when the image corresponding to the preview image of digital zoom and deformation process and eyeglass 2 is close or equal, the drive unit of camera drives micromachine to carry out eyeglass switching, eyeglass 1 is switched to eyeglass 2, thus ensured the seamless jump between eyeglass, the real slitless connection for preview image during eyeglass switching of this seamless jump.
Optionally, in order to keep the continuity of redirect, can when being about to arrive switching point, namely the first predetermined threshold value is differed by the focal length of digital zoom with between the focal length of described to be switched eyeglass 2 extremely, and when differing the second predetermined threshold value between the strain image to be obtained by the deformation process image corresponding with described to be switched eyeglass 2 extremely, think preview image now and the image similarity or identical corresponding to eyeglass 2, now namely start switching, thus maintain the stability of user's preview image in whole zoom operation, handoff procedure is made not affect stability and the definition of preview image, thus lifting Consumer's Experience.The first predetermined threshold value herein and the second predetermined threshold value are determined according to empirical value in this area, and can adjust according to user's request, do not limit herein.The object arranging threshold value is the switching redirect allowing to carry out in advance when there is the difference of predetermined threshold value between eyeglass, obviously, just switching redirect is carried out time identical between the image of the image after namely meaning zoom and deformation process when predetermined threshold value value is herein zero time and to be switched eyeglass 2 correspondence extremely.On the basis of above-mentioned amplification zoom, if when needing to continue to amplify zoom, system is by based on the preview image photographed of eyeglass 2, carry out digital zoom process, or also carry out deformation process simultaneously, when the image corresponding to the preview image that digital zoom and deformation process obtain and eyeglass 3 is close or equal, the image processor accessory drive of camera drives rotating disk to carry out rotation and realizes eyeglass switching, eyeglass 2 is switched to eyeglass 3, thus ensures the seamless jump between eyeglass.In like manner, when user carries out reducing zoom, identical mode is also taked to carry out zoom and eyeglass hand-off process.
When user have selected a suitable shooting focal length, then export shooting instruction and carry out shooting operation by the optical mirror slip that this focal length is corresponding, thus finally export photographic images.
On the basis of above-described embodiment, further alternative, between step S101 and S103, also comprise step S102: export once shooting instruction and taken by described first eyeglass.And receive described focal length switching command in Preset Time after described shooting completes.Namely when user is when taking pictures, can after startup camera carries out IMAQ, before receiving focal length switching command, shooting operation is carried out according to current lens 1, and carrying out receiving focal length switching command in the Preset Time after this shooting operation, thus carry out photographing operation by the eyeglass 2 pairs of Same Scene after switching focal length again.On the basis of this execution mode, this embodiment can also comprise step S110: carry out image co-registration by the image obtained by described first eyeglass shooting with by the image that described second eyeglass shooting obtains, namely after eyeglass 2 completes shooting operation, image co-registration is carried out, with the definition of improving picture subregion to two imagings of being taken gained by eyeglass 1 and eyeglass 2.
We still suppose at least two have different focal focus optical mirror slip be 3 there is different focal focus optical mirror slip, suppose in these 3 eyeglasses: the focal length of eyeglass 1 is fl1, the focal length of eyeglass 2 is fl2, the focal length of eyeglass 3 is fl3, and fl1<fl2<fl3; When taking, eyeglass 1 pair of image can be utilized to take and in Preset Time, receiving focal length switching command thus taking pictures to obtain by carrying out second time with eyeglass 2 pairs of same object the area image having high definition, or can also continue to receive focal length switching command again in the Preset Time after being carried out second time by eyeglass 2 and taking pictures, thus be undertaken taking pictures to obtain the area image having further high definition for the third time by eyeglass 3 pairs of same object.When user takes pictures with eyeglass 1, shutter is pressed user, after current picture taken by eyeglass 1, micromachine drives rotating disk to make work eyeglass switch to eyeglass 2 from eyeglass 1 rapidly and take current picture by eyeglass 2, current picture is taken again as previously mentioned by eyeglass 3, cell phone processor carries out image co-registration to the picture that three eyeglasses photograph afterwards, eyeglass 3 is taken the photo imaging fusion obtained to enter eyeglass 2 and take the photograph to obtain corresponding region in photo imaging, eyeglass 2 is taken the photo imaging fusion obtained to enter eyeglass 1 and take the photograph to obtain corresponding region in photo imaging, generate local detail photo with great visual angle more clearly.Because three lens angles are identical, high definition part is in image middle position.In like manner, eyeglass 1 also can be utilized to take continuously same object in Preset Time with eyeglass 2 and the even more eyeglass of eyeglass 3, and recycling cell phone processor merges the picture that the plurality of eyeglass photographs, and repeats no more herein.
Concrete, above-mentioned steps S110, in concrete implementation procedure, can also specifically comprise the following steps:
S1101, demarcates based on the same coordinate system by the described image by described first eyeglass shooting acquisition with by the image that described second eyeglass shooting obtains, obtains uncalibrated image.
S1103, is calculated the described image by described first eyeglass shooting acquisition by described uncalibrated image and is taken the digital conversion model of the image obtained by described second eyeglass.
S1105, merges by the described image by described first eyeglass shooting acquisition with by the image that described second eyeglass shooting obtains according to described digital variation model.
For two eyeglasses, when equipment dispatches from the factory adjustment, the image that two eyeglasses are taken at same position is carried out images match.
Described coupling can be accomplished in several ways, such as SIFT(scale invariant feature conversion Scale-invariant feature transform, SIFT) etc. based on the coupling of image characteristic point, or based on the image based on gray-scale statistical.In the present invention, because two positions of camera lens when taking respectively are identical, so the method for carrying out demarcating in same camera lens coordinate system can be adopted in the present invention to mate different images, be about to by the image of the first eyeglass shooting acquisition and demarcated based on the same coordinate system by the image that the second eyeglass shooting obtains, thus obtaining uncalibrated image.Illustrate the method for this demarcation below.
As Fig. 6 scaling board example, first, camera lens 1 is demarcated.Scaling board with coordinate system is placed in camera lens 1 picture center, shooting picture as shown in Figure 7.Then be switched to camera lens 2, shooting picture as shown in Figure 8, obtains uncalibrated image according to this demarcation, thus find the coincidence corresponding region of two camera lenses, mathematical transformation model p1 (x, the y)=p2 (ax, by) of the correspondence of two camera lenses can be set up according to this uncalibrated image simultaneously.Wherein p1 represents the pixel in camera lens 1, and wherein x, y represent the coordinate figure of this pixel; Wherein p2 represents the pixel with pixel p1 correspondence position in camera lens 1 in camera lens 2, and wherein ax, by represent the coordinate figure of this corresponding pixel points, and wherein a can equal b, also can be not equal to b.
When taking, according to the transformation model set up during adjustment, the overlapping region of the image of the second camera lens and the first camera lens is fused in the first camera lens.
Merge time, can kinds of schemes be taked, such as in wavelet field based on the fusion of single pixel or the fusion based on provincial characteristics.If implement the fusion based on single pixel, then carry out wavelet decomposition at the picture gone out two lens shootings, according to the overlapping region determined during camera lens adjustment, by the direct replacement of the wavelet coefficient of camera lens 2 photographic images or be appended on the corresponding overlapping region of camera lens 1 photographic images.
When processing fusion borderline region, the filtering of weighted average or other modes can be adopted to make border excessively more natural to the wavelet coefficient of two width images.Finally wavelet reconstruction is carried out to the Wavelet image after fusion and obtain fused images.
The optical mirror slip that focuses of different focal distributes by the embodiment of the present invention in the horizontal direction, solve different optical eyeglass in the vertical direction zoom time need larger space thus make the problem that the portability of mobile terminal reduces; And carry out transition processing by Digital Zoom to preview image during the present invention carries out switching zoom between optical mirror slip, make the optical mirror slip of different focal realize seamless jump in the horizontal direction, it is clear that the preview image presented is stablized.The embodiment of the present invention also ensure that the steady and audible property of preview image in mobile terminal zooming procedure while ensureing mobile terminal portability.
An alternative embodiment of the invention aims to provide a kind of filming apparatus, to solve the zoom problem in mobile terminal shooting process, make to carry out seamless zoom between the eyeglass of different focal while guarantee mobile terminal convenience, make the image stabilization of shooting clear.
As shown in Figure 9, embodiments provide a kind of filming apparatus 200, described device 200 specifically comprises:
Lenz disc 201, comprise at least two there is different focal respectively focus optical mirror slip, at least two described optical mirror slips are arranged on described lenz disc along same horizontal plane successively by focal length size.
Driver module 203, described driver module 203 is connected with described lenz disc, for driving described lenz disc, so that first eyeglass being arranged in described IMAQ light path at least two optical mirror slips described in being arranged on described lenz disc is shifted out described IMAQ light path, and the second eyeglass in described at least two optical mirror slips is moved into described IMAQ light path.
Imageing sensor 205, is arranged in described IMAQ light path for the light be incident on this imageing sensor through described IMAQ light path is converted to view data.
Display screen 207, for obtaining the view data that described image sensor obtains, and generates preview image according to described view data.
Digital zoom module 209, when carrying out eyeglass switching for driving described lenz disc at described driver module, carries out transition processing by digital zoom to described preview image.
Taking module 211, for exporting shooting instruction after described switching completes, carries out shooting operation by described second eyeglass.
Concrete, start the filming apparatus 200 on terminal equipment, carry out IMAQ.This start-up operation can trigger this display screen 207 simultaneously and show current gathered preview image, this preview image is the realtime graphic presented by display screen 207 that filming apparatus 200 absorbs in shooting process, and this filming apparatus 200 comprises lenz disc 201, driver module 203, imageing sensor 205, display screen 207, digital zoom module 209, taking module 211.Described lenz disc 201 comprise at least two there is different focal respectively focus optical mirror slip.
When user needs to carry out zoom on the basis of the current residing focal length of this camera head 200, the optical mirror slip that focuses of different focal is switched.Namely the second eyeglass not being arranged in described IMAQ light path from the first eyeglass being arranged in described IMAQ light path to above-mentioned at least two optical mirror slips switches, to change the shooting focal length of described IMAQ.Such as, can switch to the focus lenses larger than the focal length of current lens on the basis of current lens focal length when needing to become large focal length, can switch to the focus lenses less than the focal length of current lens on the basis of current lens focal length when needing to diminish focal length, shooting focal length when changing IMAQ with this.Optionally, these have focusing optical mirror slip and can arranging successively along same horizontal plane according to the size of focal length of different focal, in concrete implementation procedure, these optical mirror slips can be controlled at same plane along same horizontal plane in round, also can control at same plane in the horizontal direction in wire.When described optical mirror slip be round control at same plane in the horizontal direction time, then corresponding to described at least two have respectively different focal focus optical mirror slip switch to rotate switch, when described optical mirror slip be wire control along same horizontal plane at same plane time, then corresponding slide handover is switched to the optical mirror slip that focuses that described at least two have different focal respectively.Certainly, the optical mirror slip of these different focal can also distribute in same level in other shape, makes can carry out moving thus realize eyeglass according to corresponding displacement mode when needs change focal length switching eyeglass to switch.
Concrete, in the embodiment of the present invention, described lenz disc 201 is arranged on described imageing sensor 205 front and parallel in this imageing sensor 205, described lenz disc 201 comprise at least two there is different focal respectively focus optical mirror slip, describedly different focus optical mirror slip and can be arranged on described lenz disc 201 successively along same horizontal plane according to the size of focal length, to make the different optical mirror slips that focuses can with this imageing sensor 205 in parallel corresponding.As a kind of optional embodiment, this lenz disc can be rotating disk, above-mentioned optical mirror slip can distribute in the horizontal direction in round on this rotating disk, as another kind of optional embodiment, this lenz disc also can be sliding plate, and above-mentioned optical mirror slip can distribute along same horizontal plane successively in wire on this sliding plate.When described lenz disc 201 is rotating disk, then accordingly, described dial rotation is driven to carry out eyeglass switching by described driver module 203; When described lenz disc 201 is sliding plate, then accordingly, drive described sliding plate to slide by described driver module 203 and carry out eyeglass switching.Certainly, the optical mirror slip of these different focal planar can also distribute in other shape, and namely described lenz disc 201 is except being rotating disk, and sliding plate can also be that other can realize the device of same or similar function.
As mentioned above, lenz disc 201 is driven by driver module 203, through over-rotation or slide can make at least two there is different focal focus optical mirror slip one by one through imageing sensor 205 front, thus to obtain the shooting effect under same object different focal.The embodiment of the present invention focuses eyeglass by what arrange different focal, carries out horizontal handoff when needs bust shot object to different eyeglass, makes far-and-near focus clear equally thus reach optical zoom effect apart from the image taking out.
As shown in figures 9 and 11, for adopt three eyeglasses and lenz disc 201 for rotating disk, as eyeglass 1, eyeglass 2, eyeglass 3, these three eyeglasses are as focusing optical mirror slip, focal length is different, suppose that the focal length of eyeglass 1 is fl1, the focal length of eyeglass 2 is fl2, the focal length of eyeglass 3 is fl3, and fl1<fl2<fl3, be arranged in the horizontal direction successively on rotating disk by focal length size as schemed these three eyeglasses, before user carries out amplification zoom, the eyeglass 1 the shortest by focal length is taken in imageing sensor 205 front.When user needs to amplify focal length, image processor 207 sends signal to driver module 203, and driver module 203 drives rotating disk to rotate, and eyeglass 2 is rotated to imageing sensor 205 front rapidly.When user needs to continue to amplify focal length, driver module 203 drives turntable rotation that eyeglass 3 is rotated to imageing sensor 205 front.
As mentioned above, when user carries out zoom, lenz disc 201 rotates thus makes above-mentionedly different to focus optical mirror slip successively through imageing sensor 205, namely carries out the switching between optical mirror slip.Due at least two have respectively different focal focus optical mirror slip mutually between focal length be difficult to accomplish seamless continuous print, therefore in order to ensure the continuity of described at least two preview images presented when having the focusing during optical mirror slip is in switching of different focal respectively, digital zoom module 209 needs to be processed by digital zoom the image that current lens gathers before switching eyeglass.Optionally, here can also by digital zoom to current lens take image to process while deformation process is done to this image, because different focal focus except image that image that optical mirror slip collects causes except the difference by focal length varies in size, also likely cause having between gathered image trickle distortion because of the difference of eyeglass, in order to not make the change of this image size and anamorphose when two eyeglasses carry out switching saltus step, what present is too lofty, because need namely to make the change of image be gentle transition state by digital zoom and deformation process before eyeglass switches saltus step, until the difference being changed to and being about between the image corresponding to eyeglass that switches to is very trickle, or time identical, just there is the switching saltus step of essence in optical mirror slip, thus make whole handoff procedure gather image in the progressively mild state changed, preview image saltus step is lofty to be unlikely to that user is felt.
In order to further illustrate above-mentioned transient process, still for Fig. 5, concrete, when user amplifies focal length, when focal length is between fl1 and fl2, digital zoom module 209 carries out transition processing to preview image based on eyeglass 1 shooting picture.When the image corresponding to the preview image of digital zoom and deformation process and eyeglass 2 is close or equal, the driver module 203 of camera drives micromachine to make lenz disc 201 carry out rotating thus realizes eyeglass and switches, eyeglass 1 is switched to eyeglass 2, thus ensured the seamless jump between eyeglass, the real slitless connection for preview image during eyeglass switching of this seamless jump.
Optionally, in order to keep the continuity of redirect, can when being about to arrive switching point, digital zoom module 209 differs the first predetermined threshold value by the focal length of digital zoom with between the focal length of described to be switched eyeglass 2 extremely, and when differing the second predetermined threshold value between the strain image to be obtained by the deformation process image corresponding with described to be switched eyeglass 2 extremely, think preview image now and the image similarity or identical corresponding to eyeglass 2, now namely start switching, thus maintain the stability of user's preview image in whole zoom operation, handoff procedure is made not affect stability and the definition of preview image, thus lifting Consumer's Experience.The first predetermined threshold value herein and the second predetermined threshold value are determined according to empirical value in this area, and can adjust according to user's request, do not limit herein.The object arranging threshold value is the switching redirect allowing to carry out in advance when there is the difference of predetermined threshold value between eyeglass, obviously, just switching redirect is carried out time identical between the image of the image after namely meaning zoom and deformation process when predetermined threshold value value is herein zero time and to be switched eyeglass 2 correspondence extremely.。
On the basis of above-mentioned amplification zoom, if when needing to continue to amplify zoom, digital zoom module 209 is by based on the preview image that photographs by eyeglass 2, carry out digital zoom process, or also carry out deformation process simultaneously, when the image corresponding to the preview image that digital zoom and deformation process obtain and eyeglass 3 is close or equal, the image processor 207 of camera controls driver module 203 and drives rotating disk 201 to carry out rotation to realize eyeglass and switch, eyeglass 2 is switched to eyeglass 3, thus ensures the seamless jump between eyeglass.In like manner, when user carries out reducing zoom, identical mode is also taked to carry out zoom and eyeglass hand-off process.
When user have selected a suitable shooting focal length, then export shooting instruction and carry out shooting operation by the optical mirror slip that this focal length is corresponding, thus finally export photographic images.
On the basis of above-described embodiment, further alternative, described taking module 211 can also be used for: when user is when taking pictures, can after startup camera carries out IMAQ, before receiving focal length switching command, carry out shooting operation according to current lens 1, and carrying out receiving focal length switching command in the Preset Time after this shooting operation, thus carry out photographing operation by the eyeglass 2 pairs of Same Scene after switching focal length again.On the basis of this execution mode, as shown in Figure 10, this embodiment can also comprise image co-registration module 213, for carrying out image co-registration by the image obtained by described first eyeglass shooting with by the image that described second eyeglass shooting obtains, namely after eyeglass 2 completes shooting operation, image co-registration is carried out, with the definition of improving picture subregion to two imagings of taking gained according to eyeglass 1 and eyeglass 2.
Here we are still for above-mentioned 3 eyeglasses, namely at least two have different focal focus optical mirror slip be 3 there is different focal focus optical mirror slip, suppose in these 3 eyeglasses: the focal length of eyeglass 1 is fl1, the focal length of eyeglass 2 is fl2, the focal length of eyeglass 3 is fl3, and fl1<fl2<fl3; When taking, eyeglass 1 pair of image can be utilized to take and in Preset Time, receiving focal length switching command thus taking pictures to obtain by carrying out second time with eyeglass 2 pairs of same object the area image having high definition, or can also continue to receive focal length switching command again in the Preset Time after being carried out second time by eyeglass 2 and taking pictures, thus be undertaken taking pictures to obtain the area image having further high definition for the third time by eyeglass 3 pairs of same object.。When user takes pictures with eyeglass 1, shutter is pressed user, after current picture taken by eyeglass 1, driver module 203 drives lenz disc 201 to make work at present eyeglass switch to eyeglass 2 from eyeglass 1 rapidly and takes current picture, current picture is taken again as previously mentioned by eyeglass 3, image co-registration module 213 merges the picture that three eyeglasses photograph afterwards, eyeglass 3 is taken the photo imaging fusion obtained to enter eyeglass 2 and take the photograph to obtain corresponding region in photo imaging, eyeglass 2 is taken the photo imaging fusion obtained to enter eyeglass 1 and take the photograph to obtain corresponding region in photo imaging, generate local detail photo with great visual angle more clearly.Because two lens angles are identical, high definition part is in image middle position.In like manner, eyeglass 1 also can be utilized to take continuously same object in Preset Time with eyeglass 2 and the even more eyeglass of eyeglass 3, and recycling image co-registration module 213 merges the picture that the plurality of eyeglass photographs, and repeats no more herein.
Concrete, above-mentioned image co-registration module 213 specifically can comprise following several unit:
Demarcating unit 2131, for demarcating based on the same coordinate system by the described image by described first eyeglass shooting acquisition with by the image that described second eyeglass shooting obtains, obtaining uncalibrated image;
Computing unit 2133, takes the image obtained and the digital conversion model being taken the image obtained by described second eyeglass by described first eyeglass described in being calculated by described uncalibrated image;
Integrated unit 2135, for merging by the described image by described first eyeglass shooting acquisition with by the image that described second eyeglass shooting obtains according to described digital variation model.
For two eyeglasses, when equipment dispatches from the factory adjustment, the image that two eyeglasses are taken at same position is carried out images match.
Described coupling can be accomplished in several ways, such as SIFT(scale invariant feature conversion Scale-invariant feature transform, SIFT) etc. based on the coupling of image characteristic point, or based on the image based on gray-scale statistical.In the present invention, because two positions of camera lens when taking respectively are identical, so so the method for carrying out demarcating in same camera lens coordinate system can be adopted in the present invention to mate different images, be about to by the image of the first eyeglass shooting acquisition and demarcated based on the same coordinate system by the image that the second eyeglass shooting obtains, thus obtaining uncalibrated image.Illustrate the method for this demarcation below.
As Fig. 6 demarcates an edition example, first, camera lens 1 is demarcated.Scaling board with coordinate system is placed in camera lens 1 picture center, shooting picture as shown in Figure 7.Then be switched to camera lens 2, shooting picture as shown in Figure 8.Obtain uncalibrated image according to this demarcation, thus find the coincidence corresponding region of two camera lenses, mathematical transformation model p1 (x, the y)=p2 (ax, by) of the correspondence of two camera lenses can be set up simultaneously according to this uncalibrated image.Wherein p1 represents the pixel in camera lens 1, and wherein x, y represent the coordinate figure of this pixel; Wherein p2 represents the pixel with pixel p1 correspondence position in camera lens 1 in camera lens 2, and wherein ax, by represent the coordinate figure of this corresponding pixel points, and wherein a can equal b, also can be not equal to b.
When taking, according to the transformation model set up during adjustment, the overlapping region of the image of the second camera lens and the first camera lens is fused in the first camera lens.
Merge time, can kinds of schemes be taked, such as in wavelet field based on the fusion of single pixel or the fusion based on provincial characteristics.If implement the fusion based on single pixel, then carry out wavelet decomposition at the picture gone out two lens shootings, according to the overlapping region determined during camera lens adjustment, by the direct replacement of the wavelet coefficient of camera lens 2 photographic images or be appended on the corresponding overlapping region of camera lens 1 photographic images.
When processing fusion borderline region, the filtering of weighted average or other modes can be adopted to make border excessively more natural to the wavelet coefficient of two width images.Finally wavelet reconstruction is carried out to the Wavelet image after fusion and obtain fused images.
The optical mirror slip that focuses of different focal distributes by the embodiment of the present invention in the horizontal direction, solve different optical eyeglass in the vertical direction zoom time need larger space thus make the problem that the portability of mobile terminal reduces; And carry out transition processing by Digital Zoom to preview image during the present invention carries out switching zoom between optical mirror slip, make the optical mirror slip of different focal realize seamless jump in the horizontal direction, it is clear that the preview image presented is stablized.The embodiment of the present invention also ensure that while ensureing mobile terminal portability preview image in mobile terminal zooming procedure steady and audible property.
Claims (12)
1. an image pickup method, is applied to terminal, it is characterized in that, comprising:
Start camera and carry out IMAQ, and show the preview image of described collection; Described camera comprise at least two different time be arranged in the optical mirror slip of IMAQ light path;
Receive focal length switching command;
According to described focal length switching command, the first eyeglass being arranged in described IMAQ light path in described at least two optical mirror slips is shifted out described IMAQ light path, and the second eyeglass not being arranged in described IMAQ light path in described at least two optical mirror slips is moved into described IMAQ light path;
During described focal length switches, by digital zoom, transition processing is carried out to described preview image;
Described focal length has switched rear output shooting instruction, carries out shooting operation by described second eyeglass.
2. method according to claim 1, is characterized in that, carries out transition processing specifically comprise by described digital zoom and described deformation process to described preview image:
Based on the image that described first eyeglass gathers, by digital zoom, described image is amplified, by deformation process, described image is out of shape; When the focal length of described digital zoom differs the first predetermined threshold value with between the focal length of described second eyeglass, and when differing the second predetermined threshold value between the strain image image corresponding with described second eyeglass, eyeglass in described IMAQ light path switches to described second eyeglass by described first eyeglass, thus completes described transition processing.
3. method according to claim 1 and 2, it is characterized in that, after described startup camera carries out IMAQ, before receiving focal length switching command, described method also comprises: receive and once take instruction and taken by described first eyeglass, and receive described focal length switching command in Preset Time after described shooting completes.
4. method according to claim 3, is characterized in that, described method also comprises, and carries out image co-registration by the image obtained by described first eyeglass shooting with by the image that described second eyeglass shooting obtains.
5. method according to claim 4, is characterized in that, described will by described first eyeglass shooting obtain image and by described second eyeglass shooting obtain image carry out image co-registration, specifically comprise:
Demarcate based on the same coordinate system by the described image by described first eyeglass shooting acquisition with by the image that described second eyeglass shooting obtains, obtain uncalibrated image;
Calculate the described image by described first eyeglass shooting acquisition by described uncalibrated image and taken the digital conversion model of the image obtained by described second eyeglass;
Merge by the described image by described first eyeglass shooting acquisition with by the image that described second eyeglass shooting obtains according to described digital variation model.
6. a filming apparatus, is applied to terminal, it is characterized in that, comprising:
Lenz disc; Described lenz disc comprises the optical mirror slip that at least two have different focal respectively, and at least two described optical mirror slips are arranged on described lenz disc by focal length size along same horizontal plane successively;
Driver module; Described driver module is connected with described lenz disc, for driving described lenz disc, so that the first eyeglass being arranged in described IMAQ light path at least two optical mirror slips described in being arranged on described lenz disc is shifted out described IMAQ light path, and the second eyeglass in described at least two optical mirror slips is moved into described IMAQ light path;
Imageing sensor, is arranged in described IMAQ light path for the light be incident on this imageing sensor through described IMAQ light path is converted to view data;
Display screen, for obtaining the view data that described image sensor obtains, and generates preview image according to described view data;
Digital zoom module, when carrying out eyeglass switching for driving described lenz disc at described driver module, carries out transition processing by digital zoom to described preview image;
Taking module, for exporting shooting instruction after described switching completes, carries out shooting operation by described second eyeglass.
7. device according to claim 6, is characterized in that, described digital zoom module specifically for:
Based on the image that described first eyeglass gathers, by digital zoom, described image is amplified, by deformation process, deformation is carried out to described image; When the focal length of described digital zoom differs the first predetermined threshold value with between the focal length of described second eyeglass, and when differing the second predetermined threshold value between the strain image image corresponding with described second eyeglass, eyeglass in described IMAQ light path switches to described second eyeglass by described first eyeglass, thus completes described transition processing.
8. the device according to claim 6 or 7, is characterized in that,
Described lenz disc is rotating disk, at least two described optical mirror slips are arranged in on the pivot of the described rotating disk annulus that is the center of circle, the center of circle of wherein said at least two optical mirror slips is dropped on described with on the pivot of the described rotating disk annulus that is the center of circle, and being arranged in order from small to large with focal length.
9. the device according to any one of claim 6 to 8, is characterized in that,
Described lenz disc is sliding plate, and at least two described optical mirror slips are arranged on the sliding trace of described sliding plate, and the center of circle of wherein said at least two optical mirror slips is dropped on the central shaft of the sliding trace of described sliding plate, and being arranged in order from small to large with focal length.
10. the device according to any one of claim 6 to 9, it is characterized in that, described taking module also for, after described startup camera carries out IMAQ, before receiving focal length switching command, receive and once take instruction and taken by described first eyeglass, and receive described focal length switching command in Preset Time after described shooting completes.
11. want the device described in 10 according to right, it is characterized in that, described device also comprises: image co-registration module, for carrying out image co-registration by the image obtained by described first eyeglass shooting with by the image that described second eyeglass shooting obtains.
12. want the device described in 11 according to right, it is characterized in that, described image co-registration module comprises:
Demarcating unit, for demarcating based on the same coordinate system by the described image by described first eyeglass shooting acquisition with by the image that described second eyeglass shooting obtains, obtaining uncalibrated image;
Computing unit, takes the image obtained and the digital conversion model being taken the image obtained by described second eyeglass by described first eyeglass described in being calculated by described uncalibrated image;
Integrated unit, for merging by the described image by described first eyeglass shooting acquisition with by the image that described second eyeglass shooting obtains according to described digital variation model.
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