CN102572250A - Electronic device, image shooting device and method thereof - Google Patents
Electronic device, image shooting device and method thereof Download PDFInfo
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- CN102572250A CN102572250A CN2010105463374A CN201010546337A CN102572250A CN 102572250 A CN102572250 A CN 102572250A CN 2010105463374 A CN2010105463374 A CN 2010105463374A CN 201010546337 A CN201010546337 A CN 201010546337A CN 102572250 A CN102572250 A CN 102572250A
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Abstract
The invention discloses an electronic device, an image shooting device and a method thereof. The image shooting method comprises the following steps: temporary images are shot with an image shooting module group, a processing module group sets one of the temporary images as a basic image and determines whether difference between the temporary images and the basic image is larger than a threshold value or not, when difference between one of the temporary images and the basic image is larger than the threshold value, the processing module group deletes the temporary image, and finally the processing module group carries out image superposition of other temporary images and the basic image so as to generate an output image correspondingly. According to the electronic device, the image shooting device and the method of the invention, the sharpness of the generated output image after the image superposition is raised.
Description
Technical field
The invention relates to a kind of electronic installation, device for filming image and method thereof, particularly screen superimposed image mechanism to carry out electronic installation, device for filming image and the method thereof that image lamination reduces noise and exports sharp image relevant for a kind of tool.
Background technology
At present; Digital camera is when operation; When taking pictures, cause the problem of image fog perplexing shooting person all the time because of the hand vibration: the digital camera of general usefulness is when operation; The user tends to because of the fault of careless or hand-held digital camera for the moment before taking pictures, and the camera lens that causes vibration or rock.In addition, along with digital camera volume design is more and more lighter and handier, the legerity type camera is pressed shutter and hand takes place is simultaneously shaken and take the ratio of rocking photo and also can improve relatively.Therefore, the extent of hand vibration all can have influence on the quality of filmed image: the little then captured image that comes out can angle has deviation, not positive result a little; Big then cause the captured unclear result of image fog who comes out.The anti-hand camera that shakes promptly is to come out in order to overcome foregoing problems.
The known anti-hand mechanism of shaking has multiple enforcement means; Comprising the vibration that utilizes relatively moving of camera lens mechanism to compensate camera being arranged, utilizing control f-number and shutter opening time to suppress the hand phenomenon of shaking; And utilize software that the image that photographs is carried out signal processing, in the hope of replying the definition of image.The anti-hand mechanism of shaking of aforesaid optics is to utilize to move eyeglass or Image Sensor carries out level or vertical moving, revises hand and shakes caused crookedly, and the reverse correction that it produced can make camera not produce fuzzy image because of rocking; And the anti-hand mechanism of shaking of numeral is the mode through algorithm and image processing, and modifying factor is rocked and the fuzzy image that produces.
Shaking with regard to the mechanism with regard to the anti-hand of numeral, generally is to utilize the mode of multiple shooting to reduce noise, could under the environment of low-light (level) or hand shake serious situation, can take clear and image fuzzy and low noise.But take high-quality image output; Get and earlier each image is done geometric correction; So each image could be correctly point-to-point superimposed, and then utilize the image processing skill to do the processing of impurity elimination news to the image after the geometric correction, so can produce low noise and image clearly.Yet; The skill that the multiple video that on camera, extensively adopts is at present taken mostly is to handle together to all captured images, does not wherein have any screening mechanism and rejects unusable image; Therefore cause the image quality of clapping uneven; Therefore good image and bad image all can be done the action of impurity elimination news by taking away, therefore maybe be the image of mistake as the image well processing of taking away; And then cause the low quality of image output, also poorer than the image of adopting individual filming image on the contrary.
Summary of the invention
Because the problem of above-mentioned known technology, the object of the invention is providing a kind of electronic installation, device for filming image and method thereof exactly, carries out the superimposed image output problem poor quality that caused to solve known technology in the lump with quality is uneven.
According to the object of the invention, a kind of device for filming image is proposed, it comprises a filming image module and and handles module.Wherein the filming image module is taken a plurality of temporary transient images, and one of them that handle that module then sets temporary transient image is a base image, and whether the difference of judging temporary transient image and base image is greater than a threshold value.When the difference of one of them and base image of temporary transient image during, handle module and promptly delete temporary transient image, and remaining temporary transient image and base image are carried out image lamination with the corresponding image output that produces greater than threshold value.
Wherein, handle module base image and each temporary transient image are carried out geometric alignment, and corresponding one first error amount that calculates, when first error amount during greater than first threshold value, the processing module is promptly deleted temporary transient image.
Wherein, Handle stratum's distribution map (histogram) that module more utilizes base image and each temporary transient image; Whether one second error amount of judging each temporary transient image and base image is greater than one second threshold value; When second error amount during, handle module and promptly delete this temporary transient image greater than second threshold value.
Wherein, after the processing module carries out image lamination, more image output is carried out luminance compensation with digital gain (digital gain) or interpolation method (temporal interpolation).
Wherein, when temporary transient image is all deleted, handle the brightness that module promptly improves base image, and base image is beautified to form image output.
According to the object of the invention; Other proposes a kind of image shooting method; It comprises with a filming image module takes a plurality of temporary transient images; And with one handle that module sets temporary transient image one of them be a base image, again whether to handle difference that module judges temporary transient image and base image greater than a threshold value.When the difference of one of them and base image of temporary transient image during,, and remaining temporary transient image and base image are carried out image lamination with the corresponding image output that produces to handle module promptly handling this temporary transient image of module deletion greater than threshold value.
Wherein, image shooting method more comprises to handle module base image and each temporary transient image is carried out geometric alignment, and corresponding one first error amount that calculates, and when handling module and judge respectively first error amount whether greater than first threshold value.When first error amount during greater than first threshold value, then to handle this temporary transient image of module deletion.
Wherein, image shooting method more comprises to handle stratum's distribution map (histogram) that module utilizes base image and each temporary transient image, and whether one second error amount of judging each temporary transient image and base image is greater than one second threshold value.And when second error amount during greater than second threshold value, then to handle this temporary transient image of module deletion.
Wherein, image shooting method more carries out luminance compensation with digital gain (digital gain) or interpolation method (temporalinterpolation) to image output after more being contained in and handling module and carry out image lamination.
Wherein, image shooting method more comprises when a plurality of temporary transient images are all deleted, then to handle the brightness that module improves base image.To handle module base image is beautified to form image output again.
According to the object of the invention, reintroduce a kind of electronic installation, it comprises a body and aforesaid device for filming image, and device for filming image is located among the body.
Wherein, electronic installation is the mobile phone of digital camera, tool camera function, the PDA(Personal Digital Assistant) of tool camera function or the panel computer of tool camera function.
Hold the above, electronic installation of the present invention, device for filming image and method thereof, it can have one or more following advantage:
(1) this electronic installation, device for filming image and method thereof can be by a plurality of temporary transient images of geometric alignment, and screen the temporary transient image of bad according to the margin of error of its alignment, can improve the definition of the image output that behind image lamination, produces.
(2) this electronic installation, device for filming image and method thereof can be by stratum's distribution maps of analyzing each temporary transient image, and screen the temporary transient image of bad according to its margin of error, can improve the definition of the image output that behind image lamination, produces like this.
Description of drawings
Fig. 1 is the block diagram of device for filming image of the present invention;
Fig. 2 is the first embodiment sketch map of device for filming image of the present invention;
Fig. 3 is the second embodiment sketch map of device for filming image of the present invention;
Fig. 4 is the embodiment sketch map of electronic installation of the present invention;
Fig. 5 is the flow chart of image shooting method of the present invention; And
Fig. 6 is another flow chart of image shooting method of the present invention
Embodiment
See also Fig. 1, it is the block diagram of device for filming image of the present invention.As shown in the figure, device for filming image 1 of the present invention, it comprises a filming image module 10, and stores a module 11 and a processing module 12.Filming image module 10 comprised at least photo-sensitive cell such as complementation be metal-oxide-semiconductor element (ComplementaryMetal-Oxide-Semiconductor, CMOS) or charge coupled cell (Charge-Coupled-Device, CCD), camera lens and mirror group etc.; Store module 11 and can be embedded memory body, circumscribed memory card or its combination; Handle module 12 and electrically connect filming image modules 10 and store modules 11, its can be central processing unit (Central Processing Unit, CPU) or microprocessor (Micro-Processing Unit, MPU).In some preferred embodiments, device for filming image 1 of the present invention can be (Digital Video Camera) such as digital camera (Digital Camera) or digital cameras.
Wherein, Filming image module 10 is taken a plurality of temporary transient images 20; And be stored in and store in the module 11, one of them that handle that module 12 then sets temporary transient image 20 is a base image 21, and whether the difference of judging temporary transient image 20 and base image 21 is greater than a threshold value 30.When the difference of one of them and base image 21 of temporary transient image 20 during, handle module 12 and promptly delete temporary transient image 20, and remaining temporary transient image 20 and base image 21 are carried out image lamination with the corresponding image output 22 that produces greater than threshold value 30.Wherein, threshold value 30 is to have comprised one first threshold value 300 and one second threshold value 301 at least.
In some preferred embodiments, handle module 12 base image 21 and each temporary transient image 20 are carried out geometric alignment, and corresponding one first error amount 31 that calculates, when first error amount 31 during, handle module 12 and promptly delete temporary transient image 20 greater than first threshold value 300; In addition; In other preferred embodiments; Handle stratum's distribution map (histogram) of module 12 base image 21 more capable of using and each temporary transient image 20; Calculate one second error amount 32 between each temporary transient image 20 and the base image 21, and judge that whether each second error amount 32 is greater than second threshold value 301.When second error amount 32 during, handle module 12 and promptly delete temporary transient image 20 greater than second threshold value 301.And after handling module 12 a little temporary transient images 20 and base image 21 are carried out image lamination and then produced image output 22 to this, more image output 22 is carried out luminance compensation with digital gain (digital gain) or interpolation method (temporal interpolation).
Under some situation, when the situation of the temporary transient image that filming image module 10 is captured was not good, temporary transient 20 of images all can be deleted.At this moment, handle the brightness that module 12 promptly improves base image 21, and base image 21 is beautified to form image output 22.On the implementation, image output 22 is preferably with an archives stores in storing module 11, and temporary transient image 20 with a data stores in storing module 11.In addition, image output 22 is preferably and is available for users to watch, and temporary transient image 20 can't let the user watch.
Please consult Fig. 2 in the lump, it is the first embodiment sketch map of device for filming image of the present invention.As shown in the figure; Filming image module 10 has been taken three temporary transient images at first continuously; Selected wherein one as base image 210 and handle module 12 or user, so all the other two are the temporary transient image 200,201 that next will carry out geometric alignment with base image 210.By knowing among the figure; The presentation content of temporary transient image 201 is too big than the disparity of base image 210; Its possible former because blurring that hand shakes and causes, or since ambient light illumination to cross the low noise that produces too many so that in the process of geometric alignment, align out of condition.In the present embodiment, temporary transient image 201 is for after user's hand shakes, and camera has the situation of displacement downward vertically to produce, so that the sun of top is cut off is half the, the image more than the lake water of below has is taken into.When carrying out the process of geometric alignment; Handle module 12 and promptly calculate the geometric transformation parameter of its each temporary transient image 200,201 when alignment; And handle module 12 more according to each geometric transformation parameter generating first error amount 31, and compare, if image difference is excessive each other with first threshold value 300; Just can't correctly align, and then cause error excessive.And when first error amount 31 surpasses first threshold value 300; Handle module 12 this moment and assert that promptly temporary transient image 201 is bigger with the geometry gap of base image 210; Image lamination program after not being suitable for; Therefore handle module 12 and be about to the deletion from store module 11 of temporary transient image 201, and carry out image lamination with remaining temporary transient image 200 and base image 210.
See also Fig. 3, it is the second embodiment sketch map of device for filming image of the present invention.As shown in the figure; Filming image module 10 has at first been taken three temporary transient images; Selected wherein one as base image 211 and handle module 12 or user, so next all the other two be and will carry out the temporary transient image 202,203 with stratum's distribution map (histogram) analysis presentation content difference with base image 211.By knowing among the figure; The presentation content of temporary transient image 203 is too big than the difference of base image 211; Its because of the user when taking pictures; Have pedestrian 3 to swarm in the filming image scope of filming image module 10, so that stratum's distribution map 2030 of the color of temporary transient image 203 is too many with stratum's distribution map 2110 differences of base image 211, it is different representing presentation content.At this moment; Processing module 12 assert that promptly the presentation content of temporary transient image 203 is with bigger than base image 210 gaps; Image lamination program after not being suitable for; Therefore handle module 12 and be about to the deletion from store module 11 of temporary transient image 203, and carry out image lamination with remaining temporary transient image 202 and base image 211.
Yet under the present invention, having common knowledge the knowledgeable in the field should understand, and judges the method for each temporary transient image and base image difference and not only is confined to above-mentioned two kinds, and these two kinds of methods are merely way of illustration but not limitation, chat bright at this in advance.
And after handling module 12 a little temporary transient images and base image are carried out image lamination and then produced image output to this; Because the temporary transient image of part is arranged have been deleted; So the brightness of the image output after it is superimposed is not enough that is in the present embodiment; Original image output should this have the brightness that three opening and closing become, but has had a quilt to delete this moment, so just only remaining 2/3 the brightness of the image output of this moment behind image lamination.And in order to address this problem, handle module 12 promptly with digital gain (digital gain) method, the brightness of image output is directly improved 1/3, to reach original user default image brilliance when the photometry.In addition, handling module 12 also can interpolation method (temporal interpolation), after the brightness value between base image and the temporary transient image do not deleted is found out, according to this brightness value image output is carried out brightness correction.Yet under the present invention, having common knowledge the knowledgeable in the field should understand, and revises the method for image output brightness and not only is confined to above-mentioned two kinds, and these two kinds of methods are merely way of illustration but not limitation, chat bright at this in advance.
Under some situation, except base image, when the situation of the temporary transient image that all filming image modules 10 are captured was not good, then these temporary transient images then all can be deleted.At this moment, handle the brightness that module 12 promptly improves base image 21 (with the digital gain method etc.), again base image is beautified to form and the output image output.
See also Fig. 4, it is the embodiment sketch map of electronic installation of the present invention.As shown in the figure, electronic installation 4 of the present invention comprises a body 40, input unit 41 and device for filming image 1, and device for filming image 1 is arranged on the body 40 and with input unit 41 and electrically connects.1 of device for filming image has comprised the filming image module, stored module and has handled module, and being described in detail in the detailed earlier herein mistake of the device for filming image 1 here just repeated no more at this.Yet what deserves to be mentioned is; Electronic installation 4 proposed by the invention can be various portable hand-held device, for example the panel computer of digital camera, the multimedia playing apparatus with camera function, the mobile phone with camera function, Smartphone (Smart phone), guider (Navigator), tool camera function or PDA(Personal Digital Assistant) etc.
In the present embodiment; Electronic installation 4 of the present invention promptly is example with the Smartphone; It can embedded device for filming image proposed by the invention 1 as photograph usefulness, thereby the user can be by the input unit 41 of Smartphone like Touch Screen or physical button etc., under the situation that needs are taken pictures; Electronic installation 4 begins to carry out the action that the image screening is clapped by above-mentioned company immediately, thereby has promoted effect that anti-hand shakes and the definition that promotes image output greatly.The Smartphone that present embodiment disclosed is merely way of illustration but not limitation, and technical field has device that common knowledge the knowledgeable should replace other the easily device for filming image 1 of the present invention of arranging in pairs or groups under the present invention, chats bright at this in advance.
Although aforementioned in the process of explanation device for filming image of the present invention, the notion of image shooting method of the present invention also is described simultaneously, for ask clear for the purpose of, below still illustrate the flow chart detailed description in addition.
See also Fig. 5, it is the flow chart of image shooting method of the present invention.As shown in the figure, image shooting method of the present invention, it is applicable to a device for filming image, and device for filming image comprises a filming image module, and stores a module and a processing module, and image shooting method comprises the following step:
(S1) take a plurality of temporary transient images with the filming image module and be stored in and store in the module;
(S2) with handle that module sets temporary transient image one of them be a base image, again whether to handle difference that module judges temporary transient image and base image greater than a threshold value;
(S3) when the difference of one of them and base image of temporary transient image during, promptly delete temporary transient image to handle module greater than threshold value;
(S4) judge to store in the module whether also have temporary transient image to handle module;
When (S5) in storing module, having temporary transient image, promptly remaining temporary transient image and base image are carried out image lamination with the corresponding image output that produces to handle module; And
(S6) through digital gain method or interpolation method image output is carried out luminance compensation to handle module.
And when not having temporary transient image in the processing module judgement storage module in step (S4), promptly get into step:
(S40) to handle the brightness that module improves base image; And
(S41) to handle module base image is beautified to form image output.
See also Fig. 6, it is another flow chart of image shooting method of the present invention.As shown in the figure, step (S2) has more comprised the following step:
(S20) to handle module base image and each temporary transient image are carried out geometric alignment, and corresponding one first error amount that calculates;
(S21) judge that to handle module whether each first error amount is greater than first threshold value;
(S22) when first error amount during greater than first threshold value, then to handle this temporary transient image of module deletion;
(S23) utilize one second error amount that stratum's distribution map of base image and each temporary transient image judges each temporary transient image and base image whether greater than one second threshold value to handle module;
(S24) when second error amount during greater than second threshold value, then to handle this temporary transient image of module deletion.
And when in step (S23), second error amount then carries out step (S4) during not greater than one second threshold value; And after the step (S24), then carry out step (S4) and subsequent step.
The detailed description of image shooting method of the present invention and execution mode had been described when device for filming image of the present invention is narrated in the front, just repeated no more for schematic illustration at this.
In sum; Electronic installation of the present invention, device for filming image and method thereof can be by a plurality of temporary transient images of geometric alignment; And screen the temporary transient image of bad according to the margin of error of its alignment, can improve the definition of the image output that behind image lamination, produces like this; In addition, the present invention more can be through analyzing stratum's distribution map of each temporary transient image, and screen the temporary transient image of bad according to its margin of error, carries out producing image output problem poor quality when superimposed with very different image so that effective solution is known.
The above is merely illustrative, but not is restricted person.Any spirit and category that does not break away from the present invention, and to its equivalent modifications of carrying out or change, all should be contained in the claim.
Claims (8)
1. device for filming image is characterized in that: comprise:
One filming image module, it takes a plurality of temporary transient images; And
One handles module; Its set said a plurality of temporary transient images one of them be a base image; And whether the difference of judging said a plurality of temporary transient images and said base image is greater than a threshold value; When the difference of one of them and said base image of said a plurality of temporary transient images during greater than said threshold value, said processing module is promptly deleted said temporary transient image, and remaining said a plurality of temporary transient image and said base image are carried out image lamination with the corresponding image output that produces.
2. device for filming image as claimed in claim 1; It is characterized in that: said processing module carries out geometric alignment with said base image and each said temporary transient image; And corresponding one first error amount that calculates; When said first error amount during greater than one first threshold value, said processing module is promptly deleted said temporary transient image.
3. device for filming image as claimed in claim 2; It is characterized in that: said processing module more utilizes stratum's distribution map of said base image and each said temporary transient image; Whether one second error amount of judging each said temporary transient image and said base image is greater than one second threshold value; When said second error amount during greater than said second threshold value, said processing module is promptly deleted said temporary transient image.
4. device for filming image as claimed in claim 1 is characterized in that: after said processing module carries out image lamination, more with digital gain or interpolation method said image output is carried out luminance compensation.
5. image shooting method is characterized in that: comprise the following step:
Take a plurality of temporary transient images with a filming image module;
With one handle that module sets said a plurality of temporary transient images one of them be a base image;
Whether the difference of judging said a plurality of temporary transient images and said base image with said processing module is greater than a threshold value;
When the difference of one of them and said base image of said a plurality of temporary transient images during, promptly delete said temporary transient image with said processing module greater than said threshold value; And
With said processing module remaining said a plurality of temporary transient image and said base image are carried out image lamination with the corresponding image output that produces.
6. image shooting method as claimed in claim 5 is characterized in that: more comprise the following step:
With said processing module said base image and each said temporary transient image are carried out geometric alignment, and corresponding one first error amount that calculates,
Judge that with said processing module each said first error amount is whether during greater than said first threshold value; And
When said first error amount during, then delete said temporary transient image with said processing module greater than said first threshold value.
7. image shooting method as claimed in claim 5 is characterized in that: more comprise the following step:
When said a plurality of temporary transient images are all deleted, the brightness that then improves said base image with said processing module; And
With said processing module said base image is beautified to form said image output.
8. electronic installation is characterized in that: comprise:
One body; And
Just like each described device for filming image in the claim 1～3, said device for filming image is located among the said body.
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| CN104184942A (en) * | 2014-07-28 | 2014-12-03 | 联想(北京)有限公司 | Information processing method and electronic equipment |
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Application publication date: 20120711 |