CN101472065A - Image-fetching device and method for providing image fog information - Google Patents
Image-fetching device and method for providing image fog information Download PDFInfo
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- CN101472065A CN101472065A CNA2007103013126A CN200710301312A CN101472065A CN 101472065 A CN101472065 A CN 101472065A CN A2007103013126 A CNA2007103013126 A CN A2007103013126A CN 200710301312 A CN200710301312 A CN 200710301312A CN 101472065 A CN101472065 A CN 101472065A
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Abstract
The invention relates to a method for providing image fuzzy information, which is applied to an image taking device with the shooting mode that a shooting shutter is larger than a safety shutter. The method comprises the following steps: firstly, a long exposure image under the shooting shutter and a short exposure image being smaller than or equal to the safety shutter are acquired, and a plurality of characteristic positions are correspondingly searched in the long exposure image and the short exposure image; and secondly, the characteristic comparison is performed to the corresponding characteristic positions of the long exposure image and the short exposure image to generate a comparative result, and the image fuzziness is further defined through operation by using the comparative result. Therefore, the purpose that the image fuzzy information is provided for the long exposure image when the image taking device shoots the long exposure image is achieved.
Description
Technical field
The present invention relates to a kind of image-taking device, be meant a kind of image-taking device and method that image fog information is provided especially.
Background technology
In recent years, because the fast development of digitized video and optical technology makes digital camera become and quite popularizes and ripe product that in daily life, the user also more and more is accustomed to utilizing means and the mode that photograph is used as writing down information needed of taking.
Though the technology of the anti-hand shake of digital camera at present is gradually in the middle of progress, but because the user takes the environment of photograph and the situation and the on-fixed of ambient light compensation at every turn, moreover the inhibition image fog effect that digital camera itself is supported for different screening-mode is also not quite identical, especially when the user adjusted camera and takes under the pattern of long time for exposure (aperture time is slower), the situation that image fog takes place was also just more remarkable.
And, therefore on cost, also just more can not limited the quantity that the user takes photograph, and also be user-friendly for deletion or repeated shooting because digital camera is to arrange in pairs or groups memory card (or built-in internal memory) to adopt the technology of digitized video access.Whether in this case, the action that the user utilizes digital camera to take behind every sheet photo is to switch to camera playback (Playback) pattern to confirm whether captured photo has fuzzy situation, keep or delete to take again again with decision.
Yet this kind practice will be subject to the display screen of digital camera, tends to because display screen is too little or display screen is subjected to the light influence of context, and the user can't be known in the scene and accurately differentiates the clear or fuzzy situation of photograph.And will how to improve further, whether blur to allow the user must when reaching photograph on the computer, just do not determined captured photograph afterwards, and then avoid the user to miss the situation of record field scene picture.And this is in digital camera exploitation at present, is worth the in addition place of design improvement.
Summary of the invention
In view of this, technical problem to be solved by this invention is, under the screening-mode of time exposure, utilize the method for multiple-exposure, to two images of Same Scene continuous shooting, be respectively a long exposed image and a short exposure image, and then whether utilize clearly short exposure image to differentiate long exposed image be fuzzy.Whereby, automatically carry out computing image fog situation to reach by camera itself, and more accurately inform the purpose of information of the image fog degree of its taken time exposure image of user, to allow the user conveniently select to stay or delete again and retake by this information.
In order to achieve the above object, according to scheme one of proposed by the invention, a kind of image-taking device that image fog information is provided is provided, take under the screening-mode of shutter greater than a safety shutter in one, this image fog information is provided, and this image-taking device comprises: an image acquisition unit, a processing unit and a display.Wherein image acquisition unit receives one and takes signal to capture this first image of taking the fast student and second image smaller or equal to this safety shutter.Processing unit is in order to produce this shooting signal, and receive this first image and second image, with a plurality of feature locations of corresponding search in this first image and second image, and then carry out aspect ratio to producing a comparison result, and come operation definition to go out an image fog degree according to this comparison result again at this first image and the corresponding feature locations of second image.And display connection processing unit, in order to when showing first image, the additional information that shows this image fog degree.
In order to achieve the above object, according to another program proposed by the invention, a kind of method that image fog information is provided is provided, be applied to an image-taking device and be in the screening-mode of a shooting shutter greater than a safety shutter, its step comprises: at first, capture this first image of taking the fast student and second image smaller or equal to this safety shutter, so in first image and second image a plurality of feature locations of corresponding search.Then, carry out aspect ratio to producing a comparison result at first image and the corresponding feature locations of second image, and further utilize this comparison result to come operation definition to go out an image fog degree again.Whereby, image-taking device is just reached the purpose that first image is provided image fog information.
In sum, the image-taking device of image fog information provided by the invention and method, mainly be under the screening-mode of time exposure, utilize the method for multiple-exposure, whether to two images of Same Scene continuous shooting (being respectively the image of long exposure and short exposure), and then to utilize clearly short exposure image to differentiate long exposed image be fuzzy.Whereby, allow image-taking device itself automatically by computing, and be able to more accurately to inform the purpose of image fog degree of the image of its taken time exposure of user to reach.And the user just can simply decide reservation or deletion image according to receptible image fog degree own.
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 fog information;
Fig. 2 is the first embodiment flow chart that the invention provides the method for image fog information;
Fig. 3 is the second embodiment flow chart that the invention provides the method for image fog information;
Fig. 4 is the embodiment schematic diagram of image-taking device show image fog-level information of the present invention; And
Fig. 5 is the embodiment schematic diagram of image-taking device playback indicating characteristic fog-level information of the present invention.
[description of reference numerals]
Image-taking device 1
Push-button unit 12
Mnemon 15
Image fog degree information I
Label symbol P
Embodiment
The present invention mainly is under the screening-mode of time exposure, utilize the method for multiple-exposure, to two images of Same Scene continuous shooting (being respectively the image of long exposure and short exposure), and then utilize clearly whether short exposure image is fuzzy as comparison with reference to differentiating long exposed image, so that image fog information to be provided.
Please refer to Fig. 1, be the embodiment calcspar of the image-taking device that the invention provides image fog information.As shown in the figure, the invention provides a kind of image-taking device 1 that image fog information is provided, it comprises: an image acquisition unit 11, a push-button unit 12, a processing unit 13, a display 14, a mnemon 15 and a buffer unit 16.And the image-taking device 1 that present embodiment provided mainly is applied to, when the user is set at present employed image-taking device 1 one to take shutter is screening-mode greater than a safety shutter, image-taking device 1 just can provide the image fog information of this image at every turn automatically after having taken an image, to allow the user can determine whether keeping the image of this shooting according to this image fog information, perhaps deletion is retaken again.
Above-mentioned so-called safety shutter then is according to different image-taking devices 1 and different design, generally is for example to be the shutter of 1/60 second or 1/30 second.That is to say, be set at when taking, just might be easier to photograph fuzzy image because of the time for exposure is long because of hand shake or environmental impact greater than safety shutter when the user will take shutter.Therefore,, be referenced to more accurate image practical situation after computing by to be allowed the user, whether retaken with further decision by providing of image fog information.
Furthermore bright present embodiment, when the user when using image-taking device 1, be the size (greater than safety shutter) that configures present shooting shutter earlier, and take for processing unit 13 to produce a triggering signal by pushing this push-button unit 12.And processing unit 13 then produces one and takes signal to image acquisition unit 11 after receiving this triggering signal.So, image acquisition unit 11 just can be automatically after receiving this shooting signal in the time with scene under acquisition take the fast student's first image and second image smaller or equal to safety shutter at present.That is first image that image acquisition unit 11 is captured also just forms one easily and loses burnt fuzzy image because the shooting shutter is big than safety shutter, the time for exposure is longer; And second image since employed shutter for being less than or equal to safety shutter, so the time for exposure is shorter, and can form a sharp keen sharp image relatively.So, also just can utilize second image to be used as comparing reference, differentiate the image fog degree of first image.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 next, processing unit 13 just carries out aspect ratio to produce a comparison result at the feature locations of first image and the corresponding search of second image.And because first image and second image are to belong to the image of taking continuously with scene, therefore a plurality of feature locations of corresponding search are for first image and second image, refer to just at this with a plurality of feature locations of search and to carry out aspect ratio right relatively between two images respectively under the scene.For example: searching feature under second image clearly, its feature locations is respectively A coordinate and B coordinate; May be in first image that blurs also in addition, adjacent domain with respect to the feature locations of A coordinate and B coordinate is compared its special characteristic, so by the aspect ratio to first image and the second image relative characteristic position the local difference size that is produced is produced comparison result.If feature is edge or simple lines, then can analyze the local configuration (profile) or the local frequency response (frequency response) of the relative characteristic position of this feature in long exposed image (first image), then obtain the similitude of this feature in two different images, similitude is big more, represents long exposed image more near the definition of short exposure image (second image).
And then processing unit 13 comes operation definition to go out an image fog degree according to above-mentioned comparison result again.And display 14 is connection processing unit 13, except in order to show the user with the first captured image of present shooting shutter, more can add the information of this image fog degree of demonstration on the first shown image.Wherein, display 14 is for example to utilize pie chart (Pie Chart) or bar graph (Bar Chart) to show the information of this image fog degree in the mode of percentage.Whereby, with the information of image fog degree that the first captured image of the fast student of present shooting is provided, allow the user be able to as the reference frame of whether retaking or keeping.
What deserves to be mentioned is, compare with the generation comparison result, and then define the part of image fog degree, in fact can design as following two kinds mode at processing unit 13.
Wherein a kind of is the comparison of carrying out first image and the corresponding feature locations of second image merely, and utilizes second image to be used as comparing reference, meets value (comparison result) to produce a feature respectively on the feature locations of first image.Whether it just differentiates first image of being searched with dichotomy and is consistent with the corresponding feature locations of second image and produces feature and meet value in simple terms.So processing unit 13 just meets those feature locations feature separately on duty to add up to define the image fog degree after those feature locations weight separately respectively again.For example: if corresponding feature locations meets with 0 representative, do not meet with 1 representative, and the weight of each feature locations is identical design, so after adding multiplication, the big more image fog degree of then representing of the end value that obtains is also just big more.
Another kind of mode is that first image and the corresponding feature locations of second image are carried out comparison on feature ratio or the similitude, utilize second image to be used as comparing reference, on the feature locations of first image, to produce a feature fog-level (comparison result) respectively.For instance, as if the words that are used as comparing with the lines feature, judge that then the thickness relation of this lines feature under the same feature locations of first image and second image is used as the comparison on the ratio, perhaps compare two images in the similitude of the local frequencies response of feature locations to produce the feature fog-level.So processing unit 13 adds up to define the image fog degree after respectively those feature locations feature fog-level separately being multiply by those feature locations weight separately equally more again.
Certainly, the design of above-mentioned feature locations weight, can be that weight is bigger near the Position Design of image center, it is less then to be designed to weight near image edge more, identical also can further the point that the user focused be designed to various ways such as weight is bigger and implement.
At last, the mnemon of being carried in the present embodiment 15, be connection processing unit 13, it is except in order to store first image, and corresponding first image and recording processing unit 13 are at the coordinate figure of comparison result of being searched that feature locations produced and the feature locations searched more simultaneously.And then, when user's back switching image-taking device 1 is in a playback (Playback) pattern when inspecting first image by display 14, processing unit 13 just can come correspondence markings on first image with a plurality of label symbols according to the coordinate figure of comparison result that mnemon 15 write down and feature locations, to allow the user be known the feature comparison result of understanding on each feature locations when inspecting first image.And label symbol more may further be the different label symbol (as the difference of symbol color, symbol kind) of different comparison results design, being the part that relatively belongs to fuzzy on which feature locations of clearer understanding.
Refer again to Fig. 2, be the first embodiment flow chart of the method that the invention provides image fog information.The method that image fog information is provided of present embodiment is to operate at image-taking device to take under the screening-mode of shutter greater than safety shutter, and image fog information is provided.The method step of present embodiment comprises: at first, and at first image and second image (S201) smaller or equal to safety shutter of taking the fast student with automatic pick-up under the scene one.Then, a plurality of feature locations of corresponding search (S203) in first image and second image.And then, carry out aspect ratio to step at first image and the corresponding feature locations of second image, utilize second image as the comparison reference, to produce respectively on the feature locations of first image that a feature meets value (S205) and as the comparison result of this aspect ratio to step.So, carry out calculation step, the weight of utilizing the feature of each feature locations to meet value and each feature locations adds multiplication, to define the image fog degree (S207) of first image.Provide a display at last in this image-taking device, be used for showing first image, and receive the image fog degree, further to show that first image adds the information (S209) of show image fog-level.Whereby, image-taking device is just reached the purpose that the first captured image of the fast student of present shooting is provided image fog information.
Refer again to Fig. 3, be the second embodiment flow chart of the method that the invention provides image fog information.The method that image fog information is provided of present embodiment is to operate at image-taking device to take under the screening-mode of shutter greater than safety shutter equally, and image fog information is provided.And the method step of present embodiment comprises: at first, and at first image and second image (S301) smaller or equal to safety shutter of taking the fast student with automatic pick-up under the scene one.Then, a plurality of feature locations of corresponding search (S303) in first image and second image.And then, compare at first image and the corresponding feature locations of second image, utilize second image to be used as aspect ratio, on the feature locations of first image, to produce a feature fog-level (S305) respectively with as the comparison result of this aspect ratio to step to reference.So, carry out calculation step, utilize the feature fog-level of each feature locations and the weight of each feature locations to add multiplication, to define the image fog degree (S307) of first image.Provide a display at last in this image-taking device, be used for showing first image, and receive the image fog degree, further to show that first image adds the information (S309) of show image fog-level.And the step of present embodiment is that with first the different of embodiment maximum shown in Figure 2 step aspect ratio wherein is to step and calculation step, and two embodiment are comparison and computings of carrying out feature locations respectively in a different manner.
The following description is the situation for the information that further describes show image fog-level of the present invention.Please refer to Fig. 4, be the embodiment schematic diagram of image-taking device show image fog-level information of the present invention.Wherein, suppose that the user adjusts image-taking device 1 at present and taking under the screening-mode of shutter greater than safety shutter, and the user also takes, this moment, image-taking device 1 can automatic pick-up be taken the fast student's first image and at present smaller or equal to second image of safety shutter, and then showed first image by display 14 again.And in image-taking device 1 provided by the present invention, display 14 is when showing first image, can further additionally show, so that the user to be provided the reference when whether decision keeps first image or deletion and take again via the aforementioned computing of the present invention image fog degree information I later.Wherein, the image fog degree information I of present embodiment is that the mode with pie chart illustrates, and for example after the computing image fog degree of first image be 25%.
Please continue with reference to figure 5, be the embodiment schematic diagram of image-taking device playback indicating characteristic fog-level information of the present invention.What present embodiment was illustrated is, when the user has taken first image, and adjusts image-taking device 1 in the situation of playback mode when inspecting first image.Because the present invention when storing first image, understands corresponding first image of while and writes down comparison result that feature locations produced and the coordinate figure of being searched thereof.Therefore, carrying out playback mode when inspecting first image, just can come correspondence markings on first image with label symbol P according to the coordinate figure of comparison result that is write down and feature locations, so to allow the user be known to understand the reason of 25% the image fog degree of having of actual first image.Wherein in the present embodiment, sign flag P is marked on first image with circle.
In sum, image-taking device and the method that image fog information is provided of the present invention, mainly be under the screening-mode of time exposure, utilize the method for multiple-exposure, whether to two images of Same Scene continuous shooting (being respectively the image of long exposure and short exposure), and then to utilize clearly short exposure image to differentiate long exposed image be fuzzy.Whereby, allow image-taking device itself automatically by computing, and be able to more accurately to inform the purpose of image fog degree of the image of its taken time exposure of user to reach.And the user just can simply decide reservation or deletion image according to receptible image fog degree own.
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; all scopes of the present invention should be as the criterion with claim, the those of ordinary skill in any the field of the invention can think easily and variation or modify all can be encompassed in the scope of patent protection that this case defines.
Claims (10)
1. the image-taking device that image fog information is provided is characterized in that, under the screening-mode of a shooting shutter greater than a safety shutter, provides this image fog information, and this image-taking device comprises:
One image acquisition unit receives one and takes signal to capture this one first image of taking the fast student and smaller or equal to one second image of this safety shutter;
One processing unit, in order to produce this shooting signal, and receive this first image and this second image, with a plurality of feature locations of corresponding search in this first image and this second image, and then it is right to carry out aspect ratio at this first image and the corresponding feature locations of this second image, with utilize this second image as comparison with reference to and on the feature locations of this first image, produce a comparison result, and come operation definition to go out an image fog degree according to this comparison result again; And
One display connects this processing unit, in order to showing this first image, and shows the information of this image fog degree.
2. the image-taking device that image fog information is provided as claimed in claim 1, it is characterized in that, described feature locations has a weight respectively, and those weights are set at identical weight respectively, perhaps is set at different weight respectively according to the position difference of those feature locations.
3. the image-taking device that image fog information is provided as claimed in claim 2, it is characterized in that, the described processing unit back of comparing produces a feature respectively and meets value forming this comparison result on the feature locations of this first image, and the weight that this processing unit utilizes those features to meet value and those feature locations again adds multiplication to define this image fog degree.
4. the image-taking device that image fog information is provided as claimed in claim 2, it is characterized in that, the described processing unit back of comparing produces a feature fog-level respectively forming this comparison result on the feature locations of this first image, and this processing unit utilizes the weight of those feature fog-levels and those feature locations to add multiplication to define this image fog degree again.
5. the image-taking device that image fog information is provided as claimed in claim 1 is characterized in that, further comprises:
One mnemon connects this processing unit, in order to storing this first image, and to should first image and write down the coordinate figure of this comparison result and those feature locations;
One push-button unit is exported a triggering signal and is given this processing unit, so that this processing unit produces this shooting signal; And
One buffer unit is connected between this image acquisition unit and this processing unit, this first image and this second image that are captured in order to temporary this image acquisition unit, and then offer this processing unit again and use;
Wherein, when this image-taking device is in a playback mode when showing this first image by display, this processing unit comes this first image of correspondence markings with a plurality of label symbols and according to the coordinate figure of this comparison result and those feature locations.
6. the method that image fog information is provided is characterized in that, is applied to an image-taking device and operates on the screening-mode of a shooting shutter greater than a safety shutter, and its step comprises:
Capture this one first image of taking the fast student and smaller or equal to one second image of this safety shutter;
The a plurality of feature locations of corresponding search in this first image and this second image;
It is right to carry out aspect ratio at this first image and the corresponding feature locations of this second image, with utilize this second image as comparison with reference to and on the feature locations of this first image, produce a comparison result; And
Utilize this comparison result to come operation definition to go out an image fog degree;
Whereby, this image-taking device is able to this first image is provided the information of this image fog degree.
7. the method that image fog information is provided as claimed in claim 6, it is characterized in that, described feature locations has a weight respectively, and those weights are set at identical weight respectively, perhaps is set at different weight respectively according to the position difference of those feature locations.
8. the method that image fog information is provided as claimed in claim 7, it is characterized in that, described comparison step produces a feature respectively and meets value forming this comparison result on the feature locations of this first image, and the weight of utilizing those features to meet value and those feature locations in calculation step again adds multiplication to define this image fog degree.
9. the method that image fog information is provided as claimed in claim 7, it is characterized in that, described comparison step produces a feature fog-level respectively forming this comparison result on the feature locations of this first image, and utilizes the weight of those feature fog-levels and those feature locations to add multiplication to define this image fog degree again in calculation step.
10. the method that image fog information is provided as claimed in claim 6, it is characterized in that, further comprise: provide a display in this image-taking device, in order to show this first image, and receive this image fog degree, with the additional information that shows this image fog degree when showing this first image.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007103013126A CN101472065B (en) | 2007-12-26 | 2007-12-26 | Image-fetching device and method for providing image fog information |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007103013126A CN101472065B (en) | 2007-12-26 | 2007-12-26 | Image-fetching device and method for providing image fog information |
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| CN101472065A true CN101472065A (en) | 2009-07-01 |
| CN101472065B CN101472065B (en) | 2010-12-01 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105391940A (en) * | 2015-11-05 | 2016-03-09 | 华为技术有限公司 | Image recommendation method and apparatus |
| CN105847771A (en) * | 2015-01-16 | 2016-08-10 | 联想(北京)有限公司 | Image processing method and electronic device |
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2007
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105847771A (en) * | 2015-01-16 | 2016-08-10 | 联想(北京)有限公司 | Image processing method and electronic device |
| CN105391940A (en) * | 2015-11-05 | 2016-03-09 | 华为技术有限公司 | Image recommendation method and apparatus |
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| CN101472065B (en) | 2010-12-01 |
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