CN104836947B - A kind of image capturing method and device - Google Patents

A kind of image capturing method and device Download PDF

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CN104836947B
CN104836947B CN201510227761.5A CN201510227761A CN104836947B CN 104836947 B CN104836947 B CN 104836947B CN 201510227761 A CN201510227761 A CN 201510227761A CN 104836947 B CN104836947 B CN 104836947B
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image
shooting
mrow
brightness
video
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CN104836947A (en
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吴磊
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Abstract

The invention discloses a kind of image capturing method and device.This method includes：Under multi-exposure pattern, shooting duration of video is obtained；After user inputs shooting instruction, according to the frame per second of capture apparatus, at least two images are continuously shot in the shooting duration of video；At least two images are overlapped, to form this shooting image.Image capturing method and device provided in an embodiment of the present invention, the overexposure problem of long exposure image can be easily avoided, improve picture quality.

Description

A kind of image capturing method and device
Technical field
The present embodiments relate to image data processing technique, more particularly to a kind of image capturing method and device.
Background technology
It has been the function that people generally commonly use with the development of science and technology, being taken pictures using mobile terminal.
Current mobile terminal, all with long exposure function, but long exposure function has a defect, i.e., in normal light Under line brightness, it must be overexposure to take the photo come, reduce playability.Can solve this using the annex of light damping plate to ask Topic, but the cost of product can be improved.
The content of the invention
The embodiment of the present invention provides a kind of image capturing method and device, to realize raising picture quality, and greatly carries User's use value is risen.
In a first aspect, the embodiments of the invention provide a kind of image capturing method, this method includes：
Under multi-exposure pattern, shooting duration of video is obtained；
After user inputs shooting instruction, according to the frame per second of capture apparatus, it is continuously shot at least in the shooting duration of video Two images；
At least two images are overlapped, to form this shooting image.
Second aspect, the embodiment of the present invention additionally provide a kind of image capturing device, and the device includes：
Shooting duration of video acquisition module, under multi-exposure pattern, obtaining shooting duration of video；
Shoot instruction input module, for user input shooting instruction after, according to the frame per second of capture apparatus, in the bat Take the photograph in duration and be continuously shot at least two images；
Image synthesis unit, at least two images are overlapped, to form this shooting image.
The embodiments of the invention provide a kind of image capturing method and device, can be obtained under the pattern of multiple-exposure Shooting duration of video, according to the frame per second of capture apparatus, at least two images are continuously shot, two images are overlapped, solved In the case of light is normal, the image of high quality can be also taken, to improve the use value of user.
Brief description of the drawings
Fig. 1 is a kind of image capturing method schematic flow sheet in the embodiment of the present invention one；
Fig. 2 is a kind of image capturing method schematic flow sheet in the embodiment of the present invention two；
Fig. 3 is a kind of image capturing method schematic flow sheet in the embodiment of the present invention three；
Fig. 4 is a kind of image capturing device structural representation in the embodiment of the present invention four；
Fig. 5 is a kind of image capturing device structural representation in the embodiment of the present invention five.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched The specific embodiment stated is used only for explaining the present invention, rather than limitation of the invention.It also should be noted that in order to just Part related to the present invention rather than entire infrastructure are illustrate only in description, accompanying drawing.
Embodiment one
Fig. 1 is a kind of image capturing method schematic flow sheet that the embodiment of the present invention one provides, and this method can be by moving The image capturing device configured in terminal is performed, and the device can be realized in the form of hardware and/or software.
This method includes：
S110, under multi-exposure pattern, obtain shooting duration of video；
The technical scheme of the present embodiment, multi-exposure pattern is provided with for terminal, in this mode, when obtaining shooting first It is long, it can be specifically that user inputs setting shooting duration of video or presets several shooting duration of video, be selected by user, can also It is the appropriate shooting duration of video of acquiescence.Shooting duration of video is that follow-up shooting process answers duration.
S120, user input shooting instruction after, according to the frame per second of capture apparatus, be continuously shot in the shooting duration of video At least two images；
In aforesaid operations, shooting instruction can be specifically that user presses the shooting push button of mobile terminal when being shot An action command.
Frame per second is exactly the frame number of the picture shot in 1 seconds, frame per second typically can by the performance of picture pick-up device, or The demand of user carrys out static state setting or dynamic adjusts.Aforesaid operations, after user once inputs shooting instruction, picture pick-up device is certainly Move and multiple images are continuously shot in defined shooting duration of video, the specific quantity that shoots is determined by shooting duration of video and frame per second.User Shooting instruction is inputted without repeatedly pressing shutter.
S130, at least two images are overlapped, to form this shooting image.
Multiple images are overlapped, so as to form this shooting image, it is achieved thereby that the technology with multiple-exposure Shoot long exposure image.
The technical scheme of the present embodiment, it is particularly well suited to obtain the long exposure image under ordinary ray, can effectively solves The phenomenon of exposure.Long exposure image can occur the reason for overexposure be because continuously acquired in longer shooting time light into Picture, light excessively abundance is caused to cause overexposure.The technical scheme of the present embodiment, in shooting duration of video, it will once shoot and be decomposed into Repeatedly shooting, then shooting acquisition light accumulated time is shorter every time, and overexposure phenomenon will not occur.Meanwhile multiple are continuously shot Imaging importing, long exposure image can be obtained.The technical scheme of the present embodiment, improves the quality of image, and enriches movement The use function of terminal, brings new user to be worth.
Embodiment two
Fig. 2 is a kind of image capturing method schematic flow sheet provided in an embodiment of the present invention.The technical scheme of the present embodiment Based on embodiment one, further, before shooting duration of video is obtained, in addition to：Current light condition is identified, and current Light condition reaches when imposing a condition, and opens the multi-exposure pattern.Automatic sensing light conditions are enabled the terminal to, are cut The screening-mode of long exposure is changed, avoids overexposure.
Further, current light condition will be identified, and when current light condition reaches and imposed a condition, is opened described more Re-exposure pattern operation optimization is：The automatic sensitivity of the picture pick-up device is obtained, when the automatic sensitivity is less than setting door During limit value, determine that the current light condition reaches and impose a condition, open the multi-exposure pattern.
Operated based on above-mentioned optimization, a kind of image capturing method that the present embodiment provides comprises the following steps：
S200, identification current light condition, and when current light condition reaches and imposed a condition, open the multiple-exposure Pattern；
S201, the automatic sensitivity for obtaining the picture pick-up device, when the automatic sensitivity is less than setting threshold value, really The fixed current light condition, which reaches, to impose a condition, and opens the multi-exposure pattern；
Automatic sensitivity, also known as ISO values, it is the property parameters of picture pick-up device, is to weigh sensitive journey of the egative film for light Degree, by susceptibility test and measures several numerical value to determine.That reflects the susceptibility of film.Picture pick-up device can be according to light ISO values used by selection.Automatic sensitivity is lower, then shows that current light is better.The present embodiment make use of automatic sensitivity This parameter, when the automatic sensitivity is less than setting threshold value, it is believed that current light condition is preferable, then opens described more Re-exposure pattern.
S202, under multi-exposure pattern, obtain shooting duration of video；
S203, user input shooting instruction after, according to the frame per second of capture apparatus, be continuously shot in the shooting duration of video At least two images；
S204, at least two images are overlapped, to form this shooting image.
The technical scheme of the embodiment of the present invention, by a kind of image capturing method, the automatic sensitivity of picture pick-up device is obtained, when When the automatic sensitivity is less than setting threshold value, determines that current light condition reaches and impose a condition, open multi-exposure pattern, To obtain the image of more preferable effect.
Embodiment three
Fig. 3 is a kind of image capturing method schematic flow sheet provided in an embodiment of the present invention.The technical scheme of the present embodiment Based on above-described embodiment, further, at least two images are overlapped, to form this shooting image behaviour It is optimized for：Adjustment saturation degree and the adjustment brightness of every image are calculated according to formula；For by least two images The adjustment saturation degree of corresponding pixel points and adjustment brightness are overlapped, to form the full of this shooting image corresponding pixel points With degree and brightness.
Operation based on optimization, the method that the present embodiment provides comprise the following steps：
S310, under multi-exposure pattern, obtain shooting duration of video；
S320, user input shooting instruction after, according to the frame per second of capture apparatus, be continuously shot in the shooting duration of video At least two images；
S330, the adjustment saturation degree for calculating according to equation below every image and adjustment brightness：
Wherein, SiFor the former saturation degree of image, LiFor the former brightness of image, S 'iFor the adjustment saturation degree of image, L 'iFor figure The adjustment brightness of picture, t are shooting duration of video, and k is frame per second.
S340, for by the adjustment saturation degree of the corresponding pixel points of at least two images and adjustment brightness carry out Superposition, to form the saturation degree of this shooting image corresponding pixel points and brightness.
Aforesaid way actually by the saturation degree of each sub-picture and brightness fair play, is overlapped.It is of course also possible to will The pixel intensity of each sub-picture and the heterogeneous linear superposition of brightness, to obtain the saturation degree of final long exposure image and brightness.
The technical scheme of the embodiment of the present invention, by a kind of image capturing method, with calculation, calculate the tune of image The adjustment brightness of whole saturation degree and image, is being overlapped image, makes image effect more preferably.
Example IV
Fig. 4 show a kind of structural representation of image capturing device of the offer of the embodiment of the present invention four, as shown in figure 4, The device specifically includes：Shooting duration of video acquisition module 410, shooting instruction input module 420 and image synthesis unit 430.
Wherein, shooting duration of video acquisition module 410, under multi-exposure pattern, obtaining shooting duration of video；Shooting instruction is defeated Enter module 420, for after user inputs shooting instruction, according to the frame per second of capture apparatus, continuously being clapped in the shooting duration of video Take the photograph at least two images；Image synthesis unit 430, at least two images are overlapped, to form this shooting figure Picture.
On the basis of such scheme, it is preferred that also include：Light identification module 400, for obtain shooting duration of video it Before, current light condition is identified, and when current light condition reaches and imposed a condition, open the multi-exposure pattern.It is preferred that , light identification module 400, the automatic sensitivity specifically for obtaining the picture pick-up device, when the automatic sensitivity is less than When setting threshold value, determine that the current light condition reaches and impose a condition, open the multi-exposure pattern.
The technical scheme of the embodiment of the present invention, by a kind of image capturing device, automatic identification light condition, reach and set Multi-exposure pattern is opened after fixed condition, to obtain effect better image.
Embodiment five
Fig. 5 is a kind of image capturing device schematic diagram provided in an embodiment of the present invention.The technical scheme of the present embodiment is with reality Based on applying example four, image capturing device is further optimized, the device specifically includes：Shooting duration of video acquisition module 410, clap Take the photograph instruction input module 420 and image synthesis unit 430.
Preferably, image synthesis unit 430 includes：Image computing unit 431 and image superimposition unit 432.
Wherein, image computing unit 431, adjustment saturation degree and the adjustment brightness of every image are calculated according to equation below：
Wherein, SiFor the former saturation degree of image, LiFor the former brightness of image, S 'iFor the adjustment saturation degree of image, L 'iFor figure The adjustment brightness of picture, t are shooting duration of video, and k is frame per second；Image superimposition unit 432, for by the correspondence of at least two images The adjustment saturation degree of pixel and adjustment brightness are overlapped, to form the saturation degree of this shooting image corresponding pixel points And brightness.
The technical scheme of the present embodiment, by a kind of image capturing device, using the mode of calculating, calculate the saturation of image Degree and brightness, efficiency high is convenient and swift, and data are accurate, and then improves picture quality.
The said goods can perform the method that any embodiment of the present invention is provided, and possess the corresponding functional module of execution method And beneficial effect.
Pay attention to, above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that The invention is not restricted to specific embodiment described here, can carry out for a person skilled in the art various obvious changes, Readjust and substitute without departing from protection scope of the present invention.Therefore, although being carried out by above example to the present invention It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also Other more equivalent embodiments can be included, and the scope of the present invention is determined by scope of the appended claims.

Claims (6)

  1. A kind of 1. image capturing method, it is characterised in that including：
    Current light condition is identified, and when current light condition reaches and imposed a condition, automatically turns on multi-exposure pattern；
    Under the multi-exposure pattern, shooting duration of video is obtained；
    After user inputs shooting instruction, according to the frame per second of capture apparatus, at least two are continuously shot in the shooting duration of video Image, the frame per second are the frame number of the picture shot in 1 seconds；
    At least two images are overlapped, to form this shooting image.
  2. 2. according to the method for claim 1, it is characterised in that identification current light condition, and reached in current light condition Include to the multi-exposure pattern when imposing a condition, is automatically turned on：
    The automatic sensitivity of the capture apparatus is obtained, when the automatic sensitivity is less than setting threshold value, it is determined that described work as Preceding light condition, which reaches, to impose a condition, and automatically turns on the multi-exposure pattern.
  3. 3. according to the method for claim 1, it is characterised in that be overlapped at least two images, to form this Secondary shooting image includes：
    Adjustment saturation degree and the adjustment brightness of every image are calculated according to equation below：
    <mrow> <msubsup> <mi>S</mi> <mi>i</mi> <mo>,</mo> </msubsup> <mo>=</mo> <mfrac> <msub> <mi>S</mi> <mi>i</mi> </msub> <mrow> <mi>t</mi> <mo>&amp;times;</mo> <mi>k</mi> </mrow> </mfrac> </mrow>
    <mrow> <msubsup> <mi>L</mi> <mi>i</mi> <mo>,</mo> </msubsup> <mo>=</mo> <mfrac> <msub> <mi>L</mi> <mi>i</mi> </msub> <mrow> <mi>t</mi> <mo>&amp;times;</mo> <mi>k</mi> </mrow> </mfrac> </mrow>
    Wherein, SiFor the former saturation degree of image, LiFor the former brightness of image, S 'iFor the adjustment saturation degree of image, L 'iFor image Brightness is adjusted, t is shooting duration of video, and k is frame per second；
    The adjustment saturation degree of the corresponding pixel points of at least two images and adjustment brightness are overlapped, to form this The saturation degree of secondary shooting image corresponding pixel points and brightness.
  4. A kind of 4. image capturing device, it is characterised in that including：
    Light identification module, for before shooting duration of video is obtained, identifying current light condition, and reach in current light condition When imposing a condition, multi-exposure pattern is automatically turned on；
    Shooting duration of video acquisition module, under the multi-exposure pattern, obtaining shooting duration of video；
    Shoot instruction input module, for user input shooting instruction after, according to the frame per second of capture apparatus, in the shooting At least two images are continuously shot in length, the frame per second is the frame number of the picture shot in 1 seconds；
    Image synthesis unit, at least two images are overlapped, to form this shooting image.
  5. 5. device according to claim 4, it is characterised in that the light identification module is specifically used for：
    The automatic sensitivity of the capture apparatus is obtained, when the automatic sensitivity is less than setting threshold value, it is determined that described work as Preceding light condition, which reaches, to impose a condition, and automatically turns on the multi-exposure pattern.
  6. 6. device according to claim 4, it is characterised in that described image synthesis module includes：
    Image computing unit, adjustment saturation degree and the adjustment brightness of every image are calculated according to equation below：
    <mrow> <msubsup> <mi>S</mi> <mi>i</mi> <mo>,</mo> </msubsup> <mo>=</mo> <mfrac> <msub> <mi>S</mi> <mi>i</mi> </msub> <mrow> <mi>t</mi> <mo>&amp;times;</mo> <mi>k</mi> </mrow> </mfrac> </mrow>
    <mrow> <msubsup> <mi>L</mi> <mi>i</mi> <mo>,</mo> </msubsup> <mo>=</mo> <mfrac> <msub> <mi>L</mi> <mi>i</mi> </msub> <mrow> <mi>t</mi> <mo>&amp;times;</mo> <mi>k</mi> </mrow> </mfrac> </mrow>
    Wherein, SiFor the former saturation degree of image, LiFor the former brightness of image, S 'iFor the adjustment saturation degree of image, L 'iFor image Brightness is adjusted, t is shooting duration of video, and k is frame per second；
    Image superimposition unit, for by the adjustment saturation degree of the corresponding pixel points of at least two images and adjustment brightness It is overlapped, to form the saturation degree of this shooting image corresponding pixel points and brightness.
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