CN101424856A - Image- acquiring device for providing image compensating function and image compensation process thereof - Google Patents
Image- acquiring device for providing image compensating function and image compensation process thereof Download PDFInfo
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Abstract
An image compensation method of an image sampling device is applied to a shooting mode with the exposure time longer than that of a secure shutter. The method comprises the following steps: firstly, capturing a long exposure image under the prior shutter and a short exposure image less than and equal to the secure shutter, and recording a shaking trace signal of the long exposure image during the exposure period; successively, trying reconstructing the long exposure image to recover a clearer image according to the shaking trace signal, and further utilizing an image analytic technique to abstract the images of the reconstructing image and the short exposure image different frequency components; and finally, merging the image with different frequency components according to a certain scale to generate a clear output image, therefore, a clear reconstructing image with less noise can be obtained through shooting under the long-term exposure by means of the assistance of the short exposure image.
Description
Technical field
The present invention relates to a kind of image-taking device, be meant that especially a kind of image compensation function that provides is to prevent to produce the image-taking device and the image compensation method thereof of handshake fuzziness image.
Background technology
Quick growth along with the digital camera technology, the technology of the image fog that the vibrations of compensation camera are caused also just comes into one's own day by day, the technology of the anti-hand shake of digital camera at present is divided into two kinds of mechanism haply, is respectively the anti-hand shake of optics sensing mechanism and software compensation mechanism.
The principle of optics sensing mechanism mainly is to handle from camera lens and photo-sensitive cell (CCD), compensates rocking that camera itself caused to come the correction of controls lens or photo-sensitive cell by the sensing result of shock sensor.Wherein aspect the camera lens control: the principle that it utilizes eyeglass to float, be offset by the shock sensor sense shock, and then by after the vibrations compensating element calculating side-play amount, do correction on the optical axis to drive eyeglass, allow picture keep stable, such advantage is that the image quality of take is better, but the effect of anti-hand shake and not obvious (because the space that eyeglass can be moved is little).And aspect the photo-sensitive cell control: it is to come the sense shock skew by shock sensor equally, and utilize the floating principle of moving of machinery mount, to offset the image fog that is caused in the vibrations process by the position correction of adjusting photo-sensitive cell, this anti-hand shake effect is than coming well by camera lens control, but this design can allow the image quality of taking relatively poor, the mechanism of the anti-hand shake of this class simultaneously must cooperate the photo-sensitive cell of higher picture element just practical, otherwise it is stable but image quality is blured loose situation picture to occur.
Yet the anti-hand shake technology of above-mentioned optics sensing mechanism generally only is applied on the camera of higher-order owing to mechanism's complexity and expensive price.And the camera of lower-order light and thin type is based on considering on mechanism and the cost that optics sensing mechanism is obviously also inapplicable, so the generation of present modal software compensation mechanism (being commonly called as the anti-hand shake of electronic type) is also just arranged.
And the cardinal principle of software compensation mechanism is, the track that utilizes shock sensor to come mobile camera moving in the records photographing process or rock recovers to handle to provide information to carry out image, forms the aftertreatment skill that auxiliary camera is taken individual image.But generally the aftertreatment skill of individual image can cause different image to recover quality under different mobile degree, and image recovers that quality also can be subjected to The noise and makes that the actual effect of the image that recovers is unsatisfactory.And then cause on the problem of fuzzy image and noise image, can't forming optimized situation.
Summary of the invention
In view of this, technical matters to be solved by this invention is, the style of shooting of multiple-exposure in the combining camera, write down different images information simultaneously with scene, and utilize the image analysing computer mode to extract the correlated frequency composition of image again to carry out visual fusion or to coincide, and then can improve signal to noise ratio (the Signal to Noise Ratio of image, S/N) can guarantee that with the shooting that reaches under the long time shutter image recovers the purpose of quality by image compensation, camera be had prevent to produce the effect of handshake fuzziness image.
In order to achieve the above object, according to a scheme proposed by the invention, a kind of image-taking device that the image compensation function is provided is provided, get off to provide image compensation in a time shutter greater than the screening-mode of a safety shutter, this image-taking device comprises: an image acquisition unit, a buffer unit, a shock sensor and a processing unit.Wherein, image acquisition unit receives one and takes signal to capture an at present fast student first image and second image smaller or equal to this safety shutter, and buffer unit be connected in shock sensor and processing unit between, be used for temporary this first image and this second image.And shock sensor one rocks trajectory signal in order to write down this image-taking device during this first image exposure.At last, processing unit is then rebuild first image to form a reconstructed image according to this vibrating locus signal, and then utilize an image analysing computer skill extracting the different frequency composition image of this reconstructed image and this second image again, and come this different frequency composition image is carried out a fusion treatment to produce an image output according to a special ratios.Wherein, distinguish with safety shutter, first image is at this fuzzy image that belongs to the long relatively time shutter, and second image then belongs to the sharp image of relative short exposure time.
In order to achieve the above object, according to another program proposed by the invention, a kind of image compensation method of image-taking device is provided, be applied to the screening-mode of a time shutter greater than a safety shutter, its step comprises: at first, acquisition one is the fast student's first image and second image smaller or equal to this safety shutter at present, and writes down this image-taking device and one rock trajectory signal during this first image exposure.Then, rebuild first image to form a reconstructed image according to the vibrating locus signal, and then utilize an image analysing computer skill to extract the different frequency composition image of this reconstructed image and this second image, come this different frequency composition image is carried out a fusion treatment to produce an image output according to a special ratios more at last.Whereby, make this image output be formed image more clearly, guarantee that image recovers the purpose of quality, just allow image-taking device under time exposure, photograph to obtain clear and the image of noise less and reach.
In other words, the invention provides a kind of image-taking device that the image compensation function is provided, under the screening-mode of a time shutter greater than a safety shutter, this image compensation function is provided, it comprises: an image acquisition unit receives one and takes signal to capture an at present fast student first image and second image smaller or equal to this safety shutter; One shock sensor is used for writing down this image-taking device and one rocks trajectory signal during this first image exposure; An and processing unit, export this shooting signal, and rebuild this first image to form a reconstructed image according to this vibrating locus signal, and then utilize an image analysing computer skill, extract the different frequency composition image of this reconstructed image and this second image, and according to a special ratios this different frequency composition image is carried out a fusion treatment to produce an image output again.
The present invention also provides a kind of image compensation method of image-taking device, is applied to the screening-mode of a time shutter greater than a safety shutter, and its step comprises: the acquisition one at present fast student's first image and second image smaller or equal to this safety shutter; Write down this image-taking device and during this first image exposure, one rock trajectory signal; Rebuild this first image to form a reconstructed image according to this vibrating locus signal; And utilize an image analysing computer skill, extract the different frequency composition image of this reconstructed image and this second image, and come this different frequency composition image is carried out a fusion treatment to produce an image output according to a special ratios again.
In sum, image-taking device and image compensation method thereof with image compensation function provided by the present invention not only can guarantee that image recovers quality, image-taking device is still possessed under the shooting condition of time exposure the effect that prevents to produce the handshake fuzziness image, and then is obtained the image of clear and few noise.In addition, more can not need to change significantly the design of hardware circuit, just can on the problem of fuzzy image and noise image, obtain preferable processing.
Above general introduction and ensuing detailed description and accompanying drawing all are to reach mode, means and the effect that predetermined purpose is taked in order to further specify the present invention.And relevant other purpose of the present invention and advantage will be set forth in follow-up explanation and accompanying drawing.
Description of drawings
Fig. 1 is the embodiment calcspar that the invention provides the image-taking device of image compensation function;
Fig. 2 is the embodiment process flow diagram of the image compensation method of image-taking device of the present invention; And
Fig. 3 is the embodiment synoptic diagram of the processing unit of image-taking device of the present invention.
[description of reference numerals]
Image-taking device 1
Finite impulse response filter unit 131
Gauss's screen unit 132
Edge treated unit 133
Push-button unit 15
Mnemon 16
Embodiment
Please refer to Fig. 1, be the embodiment calcspar of the image-taking device that the invention provides the image compensation function.As shown in the figure, present embodiment provides a kind of image-taking device 1, and it comprises: an image acquisition unit 11, a shock sensor 12, a processing unit 13, a buffer unit 14, a push-button unit 15 and a mnemon 16.Its main application is, carries out one during greater than the screening-mode of safety shutter when the user sets image-taking device 1, and image-taking device 1 just can provide the function of image compensation automatically, photographs the fuzzy image that influenced by the hand shake to prevent the user.So-called safety shutter then is according to different image-taking device 1 and different, generally is for example to be the shutter of 1/60 second or 1/30 second.That is to say, when user's use is taken greater than the shutter of safety shutter, just might be easier to photograph the fuzzy image that influenced by the hand shake because of the time shutter is long.
The user is the size (greater than safety shutter) that configures a present shutter earlier, and takes to produce a trigger pip by pushing this push-button unit 15 when using image-taking device 1.And processing unit 13 is then exported one and is taken signal to image acquisition unit 11 after receiving this trigger pip.So image acquisition unit 11 receive one just can be automatically after taking signal in the time with scene under the acquisition present student's first image and second image smaller or equal to safety shutter soon.That is first image that image acquisition unit 11 is captured also just forms one easily and loses burnt fuzzy image because shutter is big than safety shutter, the time shutter is longer; Second image is then because shutter is little than safety shutter, the time shutter is shorter, and can form a sharp keen sharp image that is full of noise.Wherein, be factory-default smaller or equal to the shutter size of safety shutter, and main safety shutter according to different image-taking devices 1 design for image-taking device 1, there is no in the present embodiment and limited its size.
And shock sensor 12 is to be used for writing down image-taking device 1 one to rock trajectory signal during first image exposure, and on general the application, shock sensor 12 can be to realize with gyroscope.In addition, buffer unit 14 be connected in image acquisition unit 11 and processing unit 13 between, first image and second image that are captured in order to temporary image acquisition unit 11 carry out access for processing unit 13.
Because processing unit 13 also connects shock sensor 12, so the processing unit 13 vibrating locus signal that is able to write down according to shock sensor 12 is rebuild first image and is formed a reconstructed image to recover it than sharp image.And on actual design, processing unit 13 is by a point spread function (Point Spread Function, PSF) have and to differentiate effect any in the image at 2,, and first image reconstruction can be formed reconstructed image so that the vibrating locus signal and first image is mutual with reference to comparison.
Then, processing unit 13 utilizes an image analysing computer skill again, handles with the different frequency composition image that extracts the reconstructed image and second image, and carries out a fusion treatment to produce an image output according to a special ratios again.And above-mentioned image analysing computer skill refers to the low-frequency component image that extracts reconstructed image respectively and a radio-frequency component image of second image, and according to special ratios the low-frequency component image of reconstructed image and the radio-frequency component image of second image are merged to produce this image output again.In addition, in the image analysing computer skill, more can further extract a radio-frequency component image of reconstructed image, with before the fusion treatment of carrying out high and low frequency composition image, be able to according to the relation of waveform it radio-frequency component image with this second image be made up earlier in advance, so that required radio-frequency component image is more accurate when fusion treatment.Wherein, special ratios is to be set according to present shutter and smaller or equal to the shutter size of safety shutter by processing unit 13 to adjust at random; The fusion treatment that it carried out then is the account form that for example merges for addition.
For instance, the mode of adjusting special ratios can for example be to carry out correspondence in the mode of inquiry corresponding tables to produce, that is to say in the corresponding tables that to be size, camera with the present shutter size of rocking (PSF) come corresponding this required number percent got of radio-frequency component image (A) (X%) that goes out with its comparatively safe shutter value, and extract from the required number percent of getting of low-frequency component image (B) (Y%) of rebuilding image.Afterwards, carrying out addition again merges to produce this image output (C).So, can be as the described result of following formula: C=(A*X%)+(B*Y%).
General chromatic image can be divided into briliancy (luminance) and chroma (chrominance), and briliancy belongs to the upper frequency composition and chroma is the signal that belongs to than low frequency.Therefore the chroma of our briliancy that also can capture short exposure image simply and long exposed image merges and forms one than low noise and the correct image of color; Or the luminance signal of the long exposed image of the luminance signal of the most short exposure image of elder generation's fusion and small part, the chroma signals with the long exposed image of major part merges again.
At last, the image output that is produced is handled at last to be used for storing processing unit 13 in mnemon 16 connection processing unit 13.And this image output be image-taking device 1 through image compensation function de-fuzzy after the actual user's of offering of institute image, and it has certain image recovery quality.
Please refer to Fig. 2, be the embodiment process flow diagram of the image compensation method of image-taking device of the present invention.The described image compensation method of present embodiment is to take under the user is set in the present shutter of image-taking device 1 screening-mode greater than safety shutter, and image-taking device 1 itself the image compensation method that can carry out automatically.The step of this method comprises: at first, when user's pressing keys unit 15 when carrying out filmed image, image-taking device 1 in succession the at present fast student of acquisition first image and smaller or equal to second image of safety shutter, be step S201, simultaneously, also can write down the vibrating locus signal of image-taking device 1 during first image exposure, be step S203.
Then, directly rebuild first image with foundation vibrating locus signal again and become this reconstructed image by point spread function, be step S205, and further carry out one and eliminate false shadow program (Artifact Reduction), when rebuilding this reconstructed image, understood the false shadow phenomenon that produces to eliminate, be step S207.In addition, after acquisition second image in step S201,, therefore can further carry out one again and eliminate noise program (Noise Reduction) because second image is to belong to the sharp keen sharp image that is full of noise, to reduce the noise of second image, be step S209.
And after step S207 and S209 finish, just utilize the image analysing computer skill again, and make up with the radio-frequency component image that extracts respectively in this reconstructed image and second image, be step S211; On the other hand, also can finish the low-frequency component image that extracts this reconstructed image synchronously, be step S213 by the image analysing computer skill.
At last, radio-frequency component image and the low-frequency component image that step S211 and S213 are produced respectively got the fusion that special ratios is carried out addition again, is step S215, to produce last desired clear image output, is step S217.
Refer again to Fig. 3, to further specify the partial design aspect of the present invention in processing unit 13.As shown in the figure, processing unit 13 reads first image 1301 and second image 1302 from buffer unit 14.Wherein, aspect first image 1301, because first image 1301 is greater than image captured under the safety shutter, therefore may be for losing burnt fuzzy image.So, processing unit 13 is just earlier by a finite impulse response filter unit (Finite ImpulseResponse, FIR) 131 mend point processing, to mend point processing to reconstruct this reconstructed image by aforementioned point spread function (having the ability of differentiating 2 pixels in the image).Then, by Gauss's screen unit 132 this reconstructed image is carried out the computing of obfuscation again, to allow the radio-frequency component of this reconstructed image disappear and to obtain the low-frequency component image.
In addition aspect second image 1302, because second image 1302 is smaller or equal to image captured under the safety shutter, therefore may be for being full of the sharp keen sharp image of noise, and we also just need use the radio-frequency component image of second image 1302.So processing unit 13 carries out Fuzzy processing to extract the low-frequency component image by Gauss's screen unit 132 with second image 1302 earlier; Then, again second image 1302 is originally deducted the low-frequency component image of second image 1302 to obtain the radio-frequency component image of second image 1302.In addition, processing unit 13 carries out edge treated by an edge processing unit 133 at the radio-frequency component image of second image 1302 again.The processing that it removes the radio-frequency component image of second image 1302 little edge earlier, the processing that strengthens marginalisation afterwards again is to obtain the radio-frequency component image of second image 1302 more accurately.
At last, processing unit 13 carries out the addition fusion with the low-frequency component image of this reconstructed image and the radio-frequency component image of second image 1302 again, to obtain last required image output 1303.
Subsidiary one what carry is that present embodiment for the present invention's one of them design aspect in processing unit 13, is not in order to restriction the present invention only.For example: the radio-frequency component image that can further obtain this reconstructed image again comes further to make up with the radio-frequency component image of second image 1302, carrying out just passing through again after the combined treatment processing of edge treated unit 133 again, just carry out addition with the low-frequency component image of this reconstructed image again and merge at last to obtain image output 1303 clearly.
In sum, image-taking device and image compensation method thereof with image compensation function provided by the present invention not only can guarantee that image recovers quality, image-taking device is still possessed under the shooting condition of time exposure the effect that prevents to produce the handshake fuzziness image, and then is obtained the image of clear and few noise.In addition, more can not need to change significantly the design of hardware circuit, just can on the problem of fuzzy image and noise image, obtain preferable processing.
But; the above; only be the detailed description and the accompanying drawing of specific embodiments of the invention; be not in order to restriction the present invention; protection scope of the present invention should be as the criterion with the scope of claims; any those skilled in the art in the field of the invention, can think easily and variation or modify all can be encompassed within the protection domain that this case defines.
Claims (19)
1, a kind of image-taking device that the image compensation function is provided is characterized in that, under the screening-mode of a time shutter greater than a safety shutter, provides this image compensation function, and it comprises:
One image acquisition unit receives one and takes signal to capture an at present fast student first image and second image smaller or equal to this safety shutter;
One shock sensor is used for writing down this image-taking device and one rocks trajectory signal during this first image exposure; And
One processing unit, export this shooting signal, and rebuild this first image to form a reconstructed image according to this vibrating locus signal, and then utilize an image analysing computer skill, extract the different frequency composition image of this reconstructed image and this second image, and according to a special ratios this different frequency composition image is carried out a fusion treatment to produce an image output again.
2, the image-taking device that the image compensation function is provided as claimed in claim 1 is characterized in that, further comprises a push-button unit, connects this processing unit, in order to produce a trigger pip, so that this processing unit is exported this shooting signal.
3, the image-taking device that the image compensation function is provided as claimed in claim 1, it is characterized in that, further comprise a buffer unit, be connected between this image acquisition unit and this processing unit, in order to keep in this first image and this second image for this processing unit access.
4, the image-taking device that the image compensation function is provided as claimed in claim 1 is characterized in that, further comprises a mnemon, connects this processing unit, in order to store this image output.
5, the image-taking device that the image compensation function is provided as claimed in claim 1, it is characterized in that, described image acquisition unit captured, and the long exposure of this first image is lost burnt fuzzy image to form one, and this second image short exposure is to form a sharp keen sharp image that is full of noise.
6, the image-taking device that the image compensation function is provided as claimed in claim 1, it is characterized in that described processing unit is to rebuild this first image by a point spread function according to this vibrating locus signal to form this reconstructed image to recover the clear of this first image.
7, the image-taking device that the image compensation function is provided as claimed in claim 1, it is characterized in that, described image analysing computer skill extracts a low-frequency component image of this reconstructed image and a radio-frequency component image of this second image, and according to this special ratios the low-frequency component image of this reconstructed image and the radio-frequency component image of this second image is carried out this fusion treatment to produce this image output again.
8, the image-taking device that the image compensation function is provided as claimed in claim 7, it is characterized in that, described image analysing computer skill further extracts a radio-frequency component image of this reconstructed image, makes up so that the radio-frequency component image of this second image is able to the radio-frequency component image of elder generation and this reconstructed image.
9, the image-taking device that the image compensation function is provided as claimed in claim 7 is characterized in that, described special ratios is set according to this present shutter and this shutter smaller or equal to safety shutter by this processing unit and adjusted.
10, the image-taking device that the image compensation function is provided as claimed in claim 7 is characterized in that, described fusion treatment is that addition is merged.
11, a kind of image compensation method of image-taking device is characterized in that, is applied to the screening-mode of a time shutter greater than a safety shutter, and its step comprises:
The acquisition one at present fast student's first image and second image smaller or equal to this safety shutter;
Write down this image-taking device and during this first image exposure, one rock trajectory signal;
Rebuild this first image to form a reconstructed image according to this vibrating locus signal; And
Utilize an image analysing computer skill, extract the different frequency composition image of this reconstructed image and this second image, and come this different frequency composition image is carried out a fusion treatment to produce an image output according to a special ratios again.
12, the image compensation method of image-taking device as claimed in claim 11 is characterized in that, the long exposure of described first image that captures is lost burnt fuzzy image to form one, and this second image short exposure is to form a sharp keen sharp image that is full of noise.
13, the image compensation method of image-taking device as claimed in claim 11 is characterized in that, after this second image of acquisition, further carries out one and eliminates the noise program, to reduce the noise of this second image.
14, the image compensation method of image-taking device as claimed in claim 11, it is characterized in that described this reconstruction procedures is rebuild this first image by execution one point spread function according to this vibrating locus signal and formed this reconstructed image to recover the clear of this first image.
15, the image compensation method of image-taking device as claimed in claim 14 is characterized in that, after this reconstruction procedures, further carries out one and eliminates false shadow program, to eliminate the false shadow that this reconstructed image is produced when rebuilding.
16, the image compensation method of image-taking device as claimed in claim 11, it is characterized in that, described image analysing computer skill extracts a low-frequency component image of this reconstructed image and a radio-frequency component image of this second image, and according to this special ratios the low-frequency component image of this reconstructed image and the radio-frequency component image of this second image is carried out this fusion treatment again.
17, the image compensation method of image-taking device as claimed in claim 16 is characterized in that, described image analysing computer skill further extracts a radio-frequency component image of this reconstructed image, and will elder generation and the radio-frequency component image of this second image make up.
18, the image compensation method of image-taking device as claimed in claim 16 is characterized in that, described special ratios is set and adjusted according to this present shutter and this shutter smaller or equal to safety shutter.
19, the image compensation method of image-taking device as claimed in claim 16 is characterized in that, described fusion treatment is that addition is merged.
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| CN200710165247A CN100594415C (en) | 2007-10-31 | 2007-10-31 | Image taking apparatus with image compensatory function and compensatory function method thereof |
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| CN200710165247A CN100594415C (en) | 2007-10-31 | 2007-10-31 | Image taking apparatus with image compensatory function and compensatory function method thereof |
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| CN101990062B (en) * | 2009-08-06 | 2012-07-18 | 华晶科技股份有限公司 | Method for setting personal secure shutter value |
| WO2017076041A1 (en) * | 2015-11-06 | 2017-05-11 | 乐视控股（北京）有限公司 | Method and device for image-stabilized photograph capturing and mobile terminal |
| CN106851090A (en) * | 2016-12-20 | 2017-06-13 | 广东欧珀移动通信有限公司 | Image processing method and device, control method and device, imaging and electronic installation |
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| CN101990062B (en) * | 2009-08-06 | 2012-07-18 | 华晶科技股份有限公司 | Method for setting personal secure shutter value |
| WO2017076041A1 (en) * | 2015-11-06 | 2017-05-11 | 乐视控股（北京）有限公司 | Method and device for image-stabilized photograph capturing and mobile terminal |
| CN106851090B (en) * | 2016-12-20 | 2019-06-28 | Oppo广东移动通信有限公司 | Image processing method and device, control method and device, imaging and electronic device |
| CN106851090A (en) * | 2016-12-20 | 2017-06-13 | 广东欧珀移动通信有限公司 | Image processing method and device, control method and device, imaging and electronic installation |
| CN106851115A (en) * | 2017-03-31 | 2017-06-13 | 联想(北京)有限公司 | A kind of image processing method and device |
| CN106851115B (en) * | 2017-03-31 | 2020-05-26 | 联想(北京)有限公司 | Image processing method and device |
| CN109120819A (en) * | 2017-06-26 | 2019-01-01 | 泰肯贸易股份公司 | The well of minitype plate is imaged |
| US10841507B2 (en) | 2017-06-26 | 2020-11-17 | Tecan Trading Ag | Imaging a well of a microplate |
| CN109120819B (en) * | 2017-06-26 | 2020-11-24 | 帝肯贸易股份公司 | Imaging wells of a microplate |
| US10965877B2 (en) | 2018-09-19 | 2021-03-30 | Altek Semiconductor Corp. | Image generating method and electronic apparatus |
| CN109688334A (en) * | 2018-11-23 | 2019-04-26 | 成都西纬科技有限公司 | Image pickup method, device, electronic equipment, computer readable storage medium |
| CN113362777A (en) * | 2021-07-05 | 2021-09-07 | 合肥工业大学 | Dimming method and display device |
| CN113362777B (en) * | 2021-07-05 | 2024-05-14 | 合肥工业大学 | Dimming method and display device |
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