CN103259972A - Image processing method and imaging device - Google Patents

Image processing method and imaging device Download PDF

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Publication number
CN103259972A
CN103259972A CN2012100368442A CN201210036844A CN103259972A CN 103259972 A CN103259972 A CN 103259972A CN 2012100368442 A CN2012100368442 A CN 2012100368442A CN 201210036844 A CN201210036844 A CN 201210036844A CN 103259972 A CN103259972 A CN 103259972A
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CN
China
Prior art keywords
image
imaging
images
composite
those
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CN2012100368442A
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Chinese (zh)
Inventor
陈金男
赵俊雄
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佳能企业股份有限公司
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Priority to CN2012100368442A priority Critical patent/CN103259972A/en
Publication of CN103259972A publication Critical patent/CN103259972A/en

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Abstract

The invention discloses an image processing method and an imaging device. The image processing method comprises the following steps: multiple frames of first images and a second image are extracted, and a frame of third image is then extracted; secondly, a mixed program is carried out according to the second image so that the first images are mixed to form a mixed image; finally, an integral program is carried out so as to synthesize the mixed image and the third image, and therefore an integral image is formed.

Description

Image treatment method and imaging device
Technical field
The present invention relates to a kind of image treatment method and imaging device, particularly a kind of energy improves image treatment method and the imaging device of handing goods to auction matter at night.
Background technology
In order to satisfy user's various demands, the function that digital camera provides is more and more polynary, and particularly for the camera of middle high-order, hand-held night, portrait function became one of important comparation and assessment of digital camera.
Clap normally pick-up image under time exposure hand-held night, draw high the ISO value owing to the time for exposure is long, it is easy of rocking in the process of taking pictures to clap therefore hand-held night, produce image object space alignment (alignment) inconsistent problem, and institute's picked image also has big noise.
Therefore, need the image treatment method of the reduction alignment problem that proposes a kind of novelty badly, the phase can be shot high-quality photo not using under tripod and the light bad environment, to promote the competitiveness of product on market.
Summary of the invention
In view of above-mentioned, one of purpose of the present invention is to propose a kind of image treatment method, and it can not use under tripod and the light bad environment, effectively improves the hand-held bad problem of alignment of taking at night, and then shoot more high-quality image, to promote the competitiveness of product on market.
According to the disclosed image treatment method of the embodiment of the invention, at first, acquisition multiframe first image and one second image capture a frame the 3rd image again.Then, carry out a combination process according to second image, first image is mixed form a composite image.At last, carry out an integrated process with synthetic composite image and the 3rd image, integrate image to form one.
According to another embodiment of the present invention, imaging device comprises a photoflash lamp, an image sensing unit and a computing center.Image sensing unit is used for capturing multiframe first image and one second image, and the collocation photoflash lamp captures a frame the 3rd image.The computing center is coupled to image sensing unit, and makes first image mix formation one composite image according to second image.Wherein, the synthetic composite image in computing center and the 3rd image, and form an integration image.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Description of drawings
Fig. 1 shows the system block diagram of the imaging device of the embodiment of the invention;
Fig. 2 is that image sensing unit is to the continuous picked image of a scene;
Fig. 3 shows the flow chart of the image treatment method of the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing structural principle of the present invention and operation principle are done concrete description:
Fig. 1 shows the system block diagram of the imaging device of the embodiment of the invention.Imaging device 1 can be camera, video camera, mobile phone, personal digital assistant, digital music player, network video camera or image capture and the test macro with image acquisition function, but not as limit.
Consult Fig. 1, in the present embodiment, imaging device 1 mainly comprises a photoflash lamp 11, an image sensing unit 13, a computing center 15 and a storage element 17.Image sensing unit 13 is in order to be converted to the signal of telecommunication with light signal.Specifically, image sensing unit 13 can be charge coupled cell or CMOS (Complementary Metal Oxide Semiconductor) image sensor, but not as limit.Computing center 15 is coupled to image sensing unit 13, is used for 13 picked image of image sensing unit are carried out specific image processing, watches for the user.Storage element 17 is coupled to computing center 15, is used for storing the image of finishing dealing with in computing center 15.Specifically, computing center 15 can be CPU, digital signal processing unit or Graphics Processing Unit, but is not limited to this; Storage element 17 can be built-in memory device in imaging device or removable formula, fast flash memory bank for example, but be not limited to this.
See also Fig. 2, be 13 pairs of continuous picked image of a scene of image sensing unit.In the present embodiment, many flashless lamps 11 of image sensing unit 13 first continuous exposures are assisted and the flashless image of acquisition, present embodiment is example with 5 flashless image 21-25, wherein flashless image 21-24 is first image, the flashless image 25 of last frame is second image, but in order to limit the present invention, last second image of real work can not be the arbitrary frame among the flashless image 21-25, and non-second image is first image among the flashless image 21-25.In case captured after 5 flashless image 21-25, image sensing unit 13 photoflash lamp 11 of arranging in pairs or groups immediately captures the 3rd image 26 of frame tool flash of light, and order is in regular turn shown in second figure.Specifically, the flashless image 21-25 and the 3rd image 26 that capture can be temporarily stored in earlier in the storage element 17.Particularly, the 3rd image 26 of tool flash of light refers to enabling institute's picked image under the prerequisite of photoflash lamp, and flashless image 21-25 is closing institute's picked image under the prerequisite of photoflash lamp, but not in order to limit the present invention.
Computing center 15 receives institute's picked image in order to self imaging sensing cell 13, and image is synthetic to be handled to carry out.Computing center 15 is benchmark with flashless image 25 earlier, carries out a combination process according to flashless image 25, flashless image 21-24 is alignd (alignment), to blend a frame composite image as object with flashless image 25.Specifically, computing center 15 is superimposed to first image on second image in regular turn according to (for example, the people) position of the object in second image and profile etc., to remove noise and to reach the effect of alignment.
Among another embodiment, above-mentioned synthetic processing is except being that first image is produced the composite image with the second image phase Calais, and also on average these flashless image 21-25 produce composite image, so be not limited with the revealer.
In addition, because flashless image 21-25 captures under time exposure, the causes such as movement of objects in therefore may rocking when taking pictures or find a view make that the position difference of the same object among the flashless image 21-25 of every frame is excessive.Among one embodiment, for fear of be referenced to as the too big image of second image difference of benchmark and influenced the effect of image alignment, imaging device 1 can a default critical value, computing center 15 before carrying out synthetic the processing, can more every frame first image and second image between measures of dispersion.If both measures of dispersion is greater than critical value, just first image that compares at present of expression is too big with the difference of second image, and reference value is lower, so be not used for synthesizing with second image.Computing center 15 only can be mixed first image of measures of dispersion less than critical value with second image, thus, just improved the alignment effect of the composite image that produces.
In general, because the 3rd image 26 is acquisitions when driving photoflash lamp 11, the time for exposure is short, so the object in institute's picked image can be comparatively clear.So utilize flashless image 21-25 to produce after the composite image of finishing that aligns, an integrated process just can be carried out in computing center 15, directly synthetic composite image and the 3rd image 26 are integrated image to form one.Specifically, computing center 15 is to form the integration image by average or stack composite image and the 3rd image 26, and the integration image that produces reached in the storage element 17 stores.
By above-mentioned processing, the integration image here should have the background of having alignd and the characteristic of prospect clearly concurrently, thus can when clapping portrait hand-held night, reduce the bad problem of alignment, and improve the definition of main body in the image.
Fig. 3 shows the flow chart of the image treatment method of the embodiment of the invention.Image treatment method also has the system of imaging function applicable to imaging device shown in Figure 11 applicable to other.Image treatment method below is described, please consults Fig. 1 and Fig. 2 simultaneously.
At first, many flashless lamps 11 of image sensing unit 13 continuous exposures are assisted and first and second image (step S301) of acquisition, are opening photoflash lamp 11 captures frame tool flash of light facing to Same Scene the 3rd image 26 (step S303) immediately.Then, a combination process is carried out at computing center 15, the measures of dispersion (step S305) between more every frame first image and second image one by one, and judge that whether measures of dispersion is less than default critical value (step S307).If not, then first image that compares at present of expression is too big with the difference of second image, should not bring with second image and mix, so just remove this first image (step S311).
If being judged as of step S307 be, then computing center 15 first image that will compare at present mixes (step S309) with second image.Afterwards, computing center 15 judges whether relatively to finish all first images (step S313), if not, then gets back to step S305 and proceeds comparison.If the first all images is all relatively finished, just form the composite image that has alignd.At last, an integrated process is carried out with synthetic composite image and the 3rd image 26 (step S315) that is produced in computing center 15, and forms the integration image, it is reached storage element 17 store (step S317).
According to above-described embodiment, image treatment method proposed by the invention and imaging device, be that flashless image with last frame is that benchmark mixes remaining flashless image, because the object space of the flashless image of last frame can be near tool flash of light image, so alignment effect the best of the image after synthetic and tool flash of light image in theory.Compared to traditional image alignment mechanism, the mode that the present invention proposes more can effectively be improved the hand-held bad problem of alignment of taking at night, and then the image of better quality is provided.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.

Claims (10)

1. an image treatment method is characterized in that, comprises:
Acquisition multiframe first image and one second image;
Capture a frame the 3rd image;
Carry out a combination process according to this second image, those first images are mixed form a composite image; And
Carry out an integrated process with synthetic this composite image and the 3rd image, and form an integration image.
2. image treatment method according to claim 1 is characterized in that, this combination process comprises:
A default critical value;
Compare the measures of dispersion between those first images and this second image; And
Measures of dispersion is averaged computing or stack computing less than those first images of this critical value and this second image, to form this composite image.
3. image treatment method according to claim 2 is characterized in that, this integrated process comprises:
This composite image of addition and the 3rd image, or this composite image and the 3rd image averaged, to form this integration image.
4. image treatment method according to claim 1 is characterized in that, also comprising provides one to glisten to capture the 3rd image.
5. according to any described image treatment method of claim 1 or 4, it is characterized in that also comprising provides one to glisten to capture the 3rd image.
6. an imaging device is characterized in that, comprises:
One photoflash lamp;
One image sensing unit is used for capturing multiframe first image and one second image, and this photoflash lamp of arranging in pairs or groups captures a frame the 3rd image; And
One computing center is coupled to this image sensing unit, according to this second image those first images is mixed and forms a composite image;
Wherein, synthetic this composite image in this computing center and the 3rd image, and form an integration image.
7. imaging device according to claim 6 is characterized in that, also comprises a storage element, in order to store this integration image.
8. imaging device according to claim 7, it is characterized in that, the measures of dispersion between those first images and this second image can be compared in this computing center, and measures of dispersion is average less than those first images and this second image of a critical value, to form this composite image.
9. imaging device according to claim 7, it is characterized in that, the measures of dispersion between those first images and this second image can be compared in this computing center, and with measures of dispersion less than those first images of a critical value and this second image addition, to form this composite image.
10. imaging device according to claim 9 is characterized in that, this computing center is to this composite image and the 3rd image superpose computing or average calculating operation, to obtain this integration image.
CN2012100368442A 2012-02-17 2012-02-17 Image processing method and imaging device CN103259972A (en)

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US10497097B2 (en) 2017-05-31 2019-12-03 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Image processing method and device, computer readable storage medium and electronic device

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CN1879401A (en) * 2003-11-11 2006-12-13 精工爱普生株式会社 Image processing device, image processing method, program thereof, and recording medium
US20080131007A1 (en) * 2004-12-23 2008-06-05 Robert Kutka Image Coding Method and Image Coding Device
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