CN106060422A - Image exposure method and mobile terminal - Google Patents

Image exposure method and mobile terminal Download PDF

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Publication number
CN106060422A
CN106060422A CN201610533216.3A CN201610533216A CN106060422A CN 106060422 A CN106060422 A CN 106060422A CN 201610533216 A CN201610533216 A CN 201610533216A CN 106060422 A CN106060422 A CN 106060422A
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exposure
image
field picture
exposure parameter
frame image
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CN201610533216.3A
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CN106060422B (en
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王康康
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Vivo Mobile Communication Co Ltd
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Vivo Mobile Communication Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70—Circuitry for compensating brightness variation in the scene
    • H04N23/76—Circuitry for compensating brightness variation in the scene by influencing the image signals

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Studio Devices (AREA)

Abstract

The invention provides an image exposure method and a mobile terminal. The method comprises the following steps of obtaining a first frame of image through a first exposure parameter and obtaining a second frame of image through a second exposure parameter, wherein the first frame of image and the second frame of image are images which are continuously collected by a camera; obtaining a local image which is coincident to the local view finding range in the second frame of image according to the predetermined local view finding range; and combining the first frame of image and the local image to generate a preview image. Through the image exposure scheme provided by the invention, the exposure effect of one region in a to-be-exposed image can be adjusted, so that the quality of the shot exposure image can be improved.

Description

A kind of image exposure method and mobile terminal
Technical field
The present invention relates to technical field of image processing, especially relate to a kind of image exposure method and mobile terminal.
Background technology
The shooting of image or find a view display time, control photographic head and rationally expose according to suitable exposure compensating be Vital condition to high-quality image.Current mobile terminal is mostly supported manually to regulate exposure, manually regulates exposure Light can be accomplished by: user shows exposure bar by clicking on setting button triggering mobile terminal on screen, uses Exposure compensating during image taking, by the vernier in exposure bar that slides, can be configured by family, reaches to regulate exposure effect Purpose.
At present, mobile terminal, when being exposed image processing, is all to carry out image entirety at identical exposure compensating Reason, say, that if user wants to regulate the exposure effect in certain region in image, then in this image, other region also can be adjusted Whole for identical exposure effect.Such as: when certain image being carried out Manual exposure and processing, bright for promoting the image of dark place in image Spend and exposure bias value heightened, then, though the regional luminance finally exposing the image dark place can get a promotion, but not The region that before exposure compensating, brightness ratio is higher then there will be the situation of overexposure.
Visible, existing image exposure scheme, because cannot only regulate the exposure effect in certain region in image to be exposed, therefore High-quality exposure image cannot be obtained out.
Summary of the invention
The embodiment of the present invention provides a kind of image exposure method and mobile terminal, to solve in existing image procossing scheme Exist because cannot only regulate the exposure effect in certain region in image to be exposed and cause cannot obtain out high-quality exposure The problem of light image.
First aspect, embodiments provides a kind of image exposure method, and described method includes: with the first exposure ginseng Number exposure obtains the first two field picture, obtains the second two field picture, wherein, described first two field picture and the with the second exposure parameter exposure Two two field pictures are the image of photographic head continuous acquisition；According to predetermined local viewfinder range, obtain described second two field picture In the topography that overlaps with local viewfinder range；Described first two field picture and described topography are merged, generates pre- Look at image.
Second aspect, the embodiment of the present invention additionally provides a kind of mobile terminal, and described mobile terminal includes: the first image obtains Delivery block, for obtaining the first two field picture with the first exposure parameter exposure, obtains the second two field picture with the second exposure parameter exposure, Wherein, described first two field picture and image that the second two field picture is photographic head continuous acquisition；Topography's acquisition module, for root According to predetermined local viewfinder range, obtain the topography overlapped in described second two field picture with local viewfinder range；Close And module, for described first two field picture and described topography are merged, generate preview image.
The image exposure method of embodiment of the present invention offer and mobile terminal, obtain continuous acquisition with different exposure parameters Two two field pictures, and the topography in a wherein two field picture is extracted merge generation preview graph with another two field picture Picture.This two two field picture owing to obtaining is that the therefore exposure effect that shooting obtains under different exposure parameters is different, correspondingly closes And in the exposure effect of the topography integrated with in the preview image generated and image the exposure effect in other region is not the most With, it is achieved thereby that only treat the purpose that in exposure image, the exposure effect in certain region is adjusted, therefore can promote and be clapped Take the photograph the quality of exposure image.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention, And can be practiced according to the content of description, and in order to allow above and other objects of the present invention, the feature and advantage can Become apparent, below especially exemplified by the detailed description of the invention of the present invention.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below by institute in the description to the embodiment of the present invention The accompanying drawing used is needed to be briefly described, it should be apparent that, the accompanying drawing in describing below is only some enforcements of the present invention Example, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to according to these accompanying drawings Obtain other accompanying drawing.
Fig. 1 is the flow chart of steps of a kind of image exposure method of the embodiment of the present invention one；
Fig. 2 is the flow chart of steps of a kind of image exposure method of the embodiment of the present invention two；
Fig. 3 is the structured flowchart of a kind of mobile terminal of the embodiment of the present invention three；
Fig. 4 is the structured flowchart of a kind of mobile terminal of the embodiment of the present invention four；
Fig. 5 is the structured flowchart of a kind of mobile terminal of the embodiment of the present invention five；
Fig. 6 is the structured flowchart of a kind of mobile terminal of the embodiment of the present invention six.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Describe, it is clear that described embodiment is a part of embodiment of the present invention rather than whole embodiments wholely.Based on this Embodiment in bright, the every other enforcement that those of ordinary skill in the art are obtained under not making creative work premise Example, broadly falls into the scope of protection of the invention.
Embodiment one
With reference to Fig. 1, it is shown that the flow chart of a kind of image exposure method of the embodiment of the present invention one.
The image exposure method of the embodiment of the present invention comprises the following steps:
Step S101: obtain the first two field picture with the first exposure parameter exposure, with the second exposure parameter exposure acquisition second Two field picture.
Wherein, the first two field picture and image that the second two field picture is photographic head continuous acquisition.Owing to both images are for taking the photograph As the image of head continuous acquisition, therefore the object in image is almost without difference.Photographic head acquired image can be on backstage Obtain by the way of taking pictures, it is also possible to be the image that preview shows in preview interface.
It should be noted that the first exposure parameter, the second exposure parameter can be preset by user, it is also possible to by moving Terminal obtains to the graphical analysis before this first two field picture, the second two field picture according to camera collection.
Step S102: according to predetermined local viewfinder range, obtain in the second two field picture with local viewfinder range weight The topography closed.
Wherein, locally viewfinder range manually can be delimited by user, it is also possible to by mobile terminal according in image to be captured The bright-dark degree in each region automatically determines, it is also possible to determined that local takes by mobile terminal according to the shooting main body in image to be captured Scape scope.
Such as: the shooting main body of image to be captured is one tree, background is meadow and blue sky.Mobile terminal can be known automatically Do not shoot main body, be defined as the tree in image to be captured shooting main body, tree region is defined as local viewfinder range.That , when obtaining topography, the second two field picture Zhong Shu region is the topography overlapped with local viewfinder range.
Step S103: merge the first two field picture and topography, generates preview image.
When merging, it may be determined that the first topography overlapped with local viewfinder range in the first two field picture；Adopt The first topography replaced in the first frame with the topography extracted from the second two field picture can complete union operation, raw Become preview image.In the preview image generated, topography can be shown that the exposure effect different from other regions.
Such as: the exposure effect of the first two field picture is A effect, the exposure effect of the second two field picture is B effect, by the second frame After the topography overlapped with local viewfinder range in image integrates with the first two field picture, office in the preview image being merged into The exposure effect of portion's image is then B, and the exposure effect in other regions is then A, and therefore, in preview image, topography can be shown that The exposure effect different from other regions.
The image exposure method that the embodiment of the present invention provides, obtains two two field pictures of continuous acquisition with different exposure parameters, And the topography in a wherein two field picture extracted merge generation preview image with another two field picture.Owing to obtaining This two two field picture be that the therefore exposure effect obtained under different exposure parameters is different, correspondingly merge the preview image of generation In the exposure effect of topography integrated with the most different from the exposure effect in other region in image, it is achieved thereby that the most right The purpose that in image to be exposed, the exposure effect in certain region is adjusted, therefore the quality of captured exposure image can be promoted.
Embodiment two
With reference to Fig. 2, it is shown that the flow chart of a kind of image exposure method of the embodiment of the present invention two.
The image exposure method of the embodiment of the present invention comprises the following steps:
Step S201: mobile terminal determines local viewfinder range.
Determine before image exposure that local viewfinder range and target light exposure effect are two essential conditions.Target light exposure is imitated Fruit can be configured concrete set-up mode being correlated with in reference to step S204 by user after determining local viewfinder range Illustrate.Determine local viewfinder range time, can in the following way in any one:
The first: mobile terminal is defined as local viewfinder range by meeting the region imposed a condition in preview interface.
Wherein, meeting the region imposed a condition can be shooting region shared by main body in image, it is also possible to be in image Brightness is less than the region of the first predetermined threshold value, it is also possible to be the region that in image, brightness is higher than the second predetermined threshold value.
The second: mobile terminal receives user and arranges operation to the first of local viewfinder range, arranges operation according to first Determine local viewfinder range.
User can manually delimit a scope in preview interface, and the scope that user manually delimited by mobile terminal determines For local viewfinder range.
The third: mobile terminal is defined as local viewfinder range by meeting the region that imposes a condition in preview interface, and Preview interface is demarcated the local viewfinder range determined；And the adjustment receiving user's local viewfinder range to demarcating operates, will Region after adjustment is defined as local viewfinder range.
The third mode is automatic with manual combination mode, and first mobile terminal automatically determines a local and find a view model Enclose, and this scope determined is demarcated in preview screen.When the local viewfinder range calibrated is unsatisfactory for user's request Time, the scope demarcated can be manually adjusted until meeting self-demand by user, after user is then adjusted by mobile terminal Region is defined as local viewfinder range.
Step S202: the first odd-numbered frame image of acquisition for mobile terminal photographic head continuous acquisition and the first even frame image.
Wherein, collection includes taking pictures and preview shows two kinds of situations, and photographic head acquired image can be logical on backstage Cross the mode taken pictures to obtain, it is also possible to be the image that preview shows in preview interface.
Step S203: mobile terminal carries out automatic exposure calculating to the first odd-numbered frame image, obtains the first exposure parameter.
A kind of preferably the first odd-numbered frame image is carried out automatic exposure calculating, obtain the first exposure parameter mode such as Under:
S1: determine the first brightness value of the first odd-numbered frame image, and the target brightness value that automatic exposure is corresponding.
Due to the brightness of pixel each in different images, therefore, the brightness value of every two field picture is the most different.Image brightness values Determine participation correlation technique, this is not specifically limited by the embodiment of the present invention.Such as: can be by by image picture The brightness value of vegetarian refreshments is averaging, and averaging of income value is defined as the brightness value that image is corresponding.
Can be automatic according to brightness of image to be captured and current environment brightness when mobile terminal carries out automatic exposure to image Determine target brightness value.
S2: by the first brightness value and target brightness value are calculated, obtain the first exposure parameter.
Why it is exposed processing to image, it is therefore an objective to the image that brightness value to be obtained is identical with target brightness value, and Mobile terminal is then needed to be exposed being only possible to image to be captured according to certain exposure parameter in order to obtain such image Realize.Therefore, this step needs to be calculated the first exposure parameter, as adopting according to the first brightness value and target brightness value Exposure parameter during collection next frame odd-numbered frame image.
Step S204: the first even frame image is exposed counting by mobile terminal according to the first exposure regulation operation of user Calculate, obtain the second exposure parameter.
Exposure regulation operation includes: brightness regulation, exposure compensating condition etc. operate, and can regulate movement by exposure regulation The terminal exposure parameter when shooting image, make the exposure effect of the image finally shot close to or reach ownership goal exposure effect Really.
User, when being exposed regulation operation, can be referred to by click specific button in the preview interface of mobile terminal Showing that mobile terminal shows exposure bar in preview interface, user regulates exposure compensating by exposure bar middle reaches target slide Value or target brightness value.
It is of course also possible to do not show exposure bar, user is slided up and down by finger in preview interface, can be exposed The regulation of offset.Such as: user's upward sliding finger, according to the size of sliding distance, it is mapped as exposure compensating 0 successively to exposing Light compensates+4；User's slide downward finger, also according to distance number, be mapped as exposure compensating 0 successively to exposure compensating-4. May be provided for user's exposure bias value option, user by selecting selects to be exposed the selection operation of offset.
First even frame image is exposed calculating by a kind of preferred the first exposure regulation operation according to user, obtains The mode of the second exposure parameter is as follows:
S1: determine target light exposure brightness according to the first exposure regulation operation of user.
When the first exposure regulation operation of user is the operation of the adjustment to exposure bias value, mobile terminal is mended by exposure Repay value and can be calculated target light exposure brightness.And when the first exposure regulation operation of user is that the adjustment to target brightness value is grasped When making, the target brightness value that user adjusts then directly can be defined as target light exposure brightness by mobile terminal.
S2: determine the second brightness value of the first even frame image.
Use corresponding mode with the first brightness value determining the first odd-numbered frame image, i.e. can determine that the first even frame image The second brightness value.
S3: by the second brightness value and target light exposure brightness are calculated, obtain the second exposure parameter.
It should be noted that step S201 is to being with by the brightness value of previous frame image and target in step S203 The explanation that brightness value is carried out as a example by determining the mode of the exposure parameter of image the most to be exposed.During implementing, expose Optical parameter is not limited to be determined by mobile terminal, it is also possible to preset according to the actual requirements by user.Correspondingly, Mobile terminal with first exposure parameter exposure obtain the first two field picture, with second exposure parameter exposure obtain the second two field picture it Before, then can directly obtain the first exposure parameter of user preset, after obtaining the second exposure parameter of user preset, control photographic head Respectively with the exposure parameter shooting respective frame image obtained.
Step S205: mobile terminal obtains the first two field picture with the first exposure parameter exposure, with the second exposure parameter exposure Obtain the second two field picture.
Wherein, the first two field picture and image that the second two field picture is photographic head continuous acquisition.In the embodiment of the present invention first Two field picture that is second odd-numbered frame image, the second two field picture that is second even frame image.
In the embodiment of the present invention, by camera collection to odd-numbered frame image separate with even frame image and to process.Right When every frame odd-numbered frame image is exposed, all use by the exposure parameter that former frame odd-numbered frame graphical analysis is obtained image It is exposed；When every frame even frame image is exposed, all use the exposure by former frame even frame graphical analysis is obtained Image is exposed by optical parameter.
Step S206: mobile terminal, according to predetermined local viewfinder range, obtains in the second two field picture and takes with local The topography that scape scope overlaps.
This step i.e. obtains the topography overlapped with local viewfinder range in the second even frame image.
Step S207: the first two field picture and topography are merged by mobile terminal, generates preview image.
When merging, determine the first topography overlapped in the first two field picture with local viewfinder range；Utilize from The first topography that the topography extracted in second two field picture replaces in the first frame with the first two field picture after replacing is Preview image, in the preview image generated, topography can be shown that the exposure effect different from other regions.
After generating preview image, if the exposure effect of the preview image generated is unsatisfactory for user's request, user is permissible Carry out the second exposure regulation operation, readjust exposure effect.User carries out the second exposure regulation operation and the first exposure regulation Operation is similar, can adjust exposure effect by adjusting exposure bias value, it is also possible to adjust by adjusting target brightness value Exposure effect.User carries out the concrete mode of the second exposure regulation operation, sees the user described in step S203 and carries out first The related description of exposure regulation operation, is not specifically limited this in the embodiment of the present invention.
Step S208: mobile terminal carries out automatic exposure calculating to the first two field picture, obtains the 3rd exposure parameter.
Mobile terminal carries out automatic exposure and calculates the concrete mode obtaining the 3rd exposure parameter the first two field picture, sees shifting Dynamic terminal carries out automatic exposure and calculates the related description obtaining the first exposure parameter the first odd-numbered frame image, and the present invention is real Execute in example and this is not especially limited.
Why this step carries out automatic exposure calculating to the first two field picture that is second odd-numbered frame image and obtains the 3rd exposure Optical parameter, it is therefore an objective to use the 3rd exposure parameter to be exposed the 3rd odd-numbered frame image processing, make shooting image be more nearly The exposure effect of user preset.
It should be noted that step S208 is not limited to after step S207 perform, the first frame figure can obtained Any instant after Xiang performs, naturally it is also possible to step S207 executed in parallel.
Step S209: the second two field picture is exposed calculating by mobile terminal according to the second exposure regulation operation of user, Obtain the 4th exposure parameter.
When calculating four exposure parameters, mobile terminal can determine the second target according to the second exposure regulation operation of user Exposure brightness, determines the 3rd brightness value of the second two field picture that is second even frame image simultaneously, by the 3rd brightness value and Second target light exposure brightness calculates, and obtains the 4th exposure parameter.
Why second two field picture that is second even frame image is exposed being calculated the 4th exposure ginseng by this step Number, it is therefore an objective to use the 4th exposure parameter to be exposed the 3rd even frame image processing, make shooting image be more nearly user The exposure effect preset.
Step S209 is not limited to after step S208 perform, can be at any instant after obtaining the second two field picture Perform, naturally it is also possible to step S207, step S208 executed in parallel.
Step S210: mobile terminal obtains the 3rd odd-numbered frame image, with the 4th exposure parameter with the 3rd exposure parameter exposure Exposure obtains the 3rd even frame image.
Wherein, the 3rd odd-numbered frame image and image that the 3rd even frame image is photographic head continuous acquisition.
Step S211: mobile terminal is according to predetermined local viewfinder range, with office in acquisition the 3rd even frame image The topography that portion's viewfinder range overlaps.
Wherein, locally viewfinder range can be identical with the local viewfinder range determined in step S204, it is also possible to different.When After the preview image generated in mobile terminal execution of step S207, user is not only by the second exposure regulation operation adjustment Exposure effect, it is also possible to adjust local viewfinder range, mobile terminal then needs to redefine local viewfinder range.Therefore, if using Family have adjusted local viewfinder range, then find a view model in the local determined in the local viewfinder range determined in this step and step S204 Enclose difference；Otherwise, the most identical.
Step S212: the topography in the 3rd odd-numbered frame image and the 3rd even frame image is closed by mobile terminal And, generate preview image.
When merging, it may be determined that the second topography overlapped with local viewfinder range in the 3rd two field picture；Adopt Replace the second topography in the 3rd odd-numbered frame with the topography extracted from the 3rd even frame image can complete to close And operate, generating preview image, in the preview image generated, topography can be shown that the exposure effect different from other regions Really.
It the embodiment of the present invention is only the image exposure method to the embodiment of the present invention as a example by generating two frame preview images Illustrate, during implementing, if the preview image generated is unsatisfactory for user's request, then can be with repeated execution of steps S208 generates the 3rd frame preview image, the 4th frame preview image etc. to step S212.
The image exposure method that the embodiment of the present invention provides, obtains two two field pictures of continuous acquisition with different exposure parameters, And the topography in a wherein two field picture extracted merge generation preview image with another two field picture.Owing to obtaining This two two field picture be that the therefore exposure effect obtained under different exposure parameters is different, correspondingly merge the preview image of generation In the exposure effect of topography integrated with the most different from the exposure effect in other region in image, it is achieved thereby that the most right The purpose that in image to be exposed, the exposure effect in certain region is adjusted, therefore the quality of captured exposure image can be promoted.
Embodiment three
With reference to Fig. 3, it is shown that the structured flowchart of a kind of mobile terminal of the embodiment of the present invention three.
The mobile terminal of the embodiment of the present invention includes: the first image collection module 301, for the first exposure parameter exposure Obtain the first two field picture, obtain the second two field picture, wherein, described first two field picture and the second frame figure with the second exposure parameter exposure As the image for photographic head continuous acquisition；Topography's acquisition module 302, is used for according to predetermined local viewfinder range, Obtain the topography overlapped in described second two field picture with local viewfinder range；Merge module 303, for described first frame Image and described topography merge, and generate preview image.
The mobile terminal of the embodiment of the present invention, when carrying out image exposure, obtains the two of continuous acquisition with different exposure parameters Two field picture, and the topography in a wherein two field picture is extracted merge generation preview image with another two field picture. This two two field picture owing to obtaining is that the therefore exposure effect obtained under different exposure parameters is different, correspondingly merges generation The exposure effect of the topography integrated with in preview image is the most different from the exposure effect in other region in image, thus real Show and only treated the purpose that in exposure image, the exposure effect in certain region is adjusted, therefore captured exposure image can have been promoted Quality.
Embodiment four
With reference to Fig. 4, it is shown that the structured flowchart of a kind of mobile terminal of the embodiment of the present invention four.
The mobile terminal of the embodiment of the present invention is the further optimization to the mobile terminal in embodiment three, the shifting after optimization Dynamic terminal includes: the first image collection module 401, for obtaining the first two field picture with the first exposure parameter exposure, exposes with second Optical parameter exposure obtains the second two field picture, wherein, described first two field picture and the figure that the second two field picture is photographic head continuous acquisition Picture；Topography's acquisition module 402, for according to predetermined local viewfinder range, obtain in described second two field picture with The topography that locally viewfinder range overlaps；Merge module 403, for described first two field picture and described topography are carried out Merge, generate preview image.
Preferably, described mobile terminal also includes: the second image collection module 404, in described first Image Acquisition Module 401 obtains the first two field picture with the first exposure parameter exposure, before obtaining the second two field picture with the second exposure parameter exposure, Obtain the first odd-numbered frame image and the first even frame image of photographic head continuous acquisition；First exposure parameter determines module 405, uses In described first odd-numbered frame image is carried out automatic exposure calculating, obtain the first exposure parameter；Second exposure parameter determines module 406, for being exposed calculating to described first even frame image according to the first of user the exposure regulation operation, obtain the second exposure Optical parameter.
Preferably, described mobile terminal also includes: the first parameter acquisition module 407, in described first Image Acquisition Module 401 obtains the first two field picture with the first exposure parameter exposure, before obtaining the second two field picture with the second exposure parameter exposure, Obtain the first exposure parameter of user preset；Second parameter acquisition module 408, for obtaining the second exposure ginseng of user preset Number.
Preferably, described mobile terminal also includes: the 3rd exposure parameter determines module 409, at described first image Acquisition module 401 obtains the first two field picture with the first exposure parameter exposure, obtains the second two field picture with the second exposure parameter exposure Afterwards, described first two field picture is carried out automatic exposure calculating, obtains the 3rd exposure parameter；4th exposure parameter determines module 410, for being exposed calculating to described second two field picture according to the second of user the exposure regulation operation, obtain the 4th exposure ginseng Number.
Preferably, described mobile terminal also includes: the 3rd image collection module 411, for raw in described merging module 403 After becoming preview image, obtain the 3rd odd-numbered frame image with the 3rd exposure parameter exposure, obtain the 3rd with the 4th exposure parameter exposure Even frame image, wherein, described 3rd odd-numbered frame image and the image that the 3rd even frame image is photographic head continuous acquisition；Second Topography's acquisition module 412, for according to predetermined local viewfinder range, obtain in described 3rd even frame image with The topography that locally viewfinder range overlaps；Second merges module 413, for described 3rd odd-numbered frame image and the described 3rd Topography in even frame image merges, and generates preview image.
Preferably, described mobile terminal also includes: the first range determination module 414, in described second Image Acquisition Before module 404 obtains the first odd-numbered frame image and the first even frame image that photographic head is continuously shot, by preview interface fullness in the epigastrium and abdomen The region that foot imposes a condition is defined as local viewfinder range；Or, the second range determination module 415, it is used for receiving user and plays a game The first of portion's viewfinder range arranges operation, arranges operation according to described first and determines local viewfinder range；Or, the 3rd scope is true Cover half block 416, for being defined as local viewfinder range by meeting the region imposed a condition in preview interface, and in preview interface Demarcate the described local viewfinder range determined, receive the adjustment operation of the user's described local viewfinder range to demarcating, will adjust After region be defined as local viewfinder range.
Preferably, described first exposure parameter determines that module 405 includes: brightness value determines submodule 4051, is used for determining First brightness value of described first odd-numbered frame image, and the target brightness value that automatic exposure is corresponding；Calculating sub module 4052, uses In by described first brightness value and described target brightness value are calculated, obtain the first exposure parameter.
Preferably, described second exposure parameter determines that module 406 includes: brightness value determines submodule 4061, for foundation The first exposure regulation operation of user determines target light exposure brightness, determines the second brightness value of the first even frame image；Calculate son Module 4062, for by calculating described second brightness value and described target light exposure brightness, obtains the second exposure ginseng Number.
Preferably, described merging module 403 includes: topography determines submodule, is used for determining described first two field picture In the first topography of overlapping with described local viewfinder range；Extract submodule, be used for utilizing in described second two field picture and carry The topography taken out replaces the first topography in the first two field picture；Preview image determines submodule, after to replace The first two field picture be preview image.
The mobile terminal of the embodiment of the present invention is used for realizing corresponding image exposure side in previous embodiment one, embodiment two Method, and there is beneficial effect corresponding with embodiment of the method, do not repeat them here.
Embodiment five
With reference to Fig. 5, it is shown that the structured flowchart of the mobile terminal of the embodiment of the present invention five.
The mobile terminal 700 of the embodiment of the present invention includes: at least one processor 701, memorizer 702, at least one net Network interface 704 and user interface 703.Each assembly in mobile terminal 700 is coupled by bus system 705.Can manage Solving, bus system 705 is for realizing the connection communication between these assemblies.Bus system 705 is in addition to including data/address bus, also Including power bus, control bus and status signal bus in addition.But for the sake of understanding explanation, in Figure 5 by various buses all It is designated as bus system 705.
Wherein, user interface 703 can include display, keyboard or pointing device such as, mouse, trace ball (trackball), touch-sensitive plate or touch screen etc..
The memorizer 702 being appreciated that in the embodiment of the present invention can be volatile memory or nonvolatile memory, Maybe can include volatibility and nonvolatile memory.Wherein, nonvolatile memory can be read only memory (Read- Only Memory, ROM), programmable read only memory (Programmable ROM, PROM), the read-only storage of erasable programmable Device (Erasable PROM, EPROM), Electrically Erasable Read Only Memory (Electrically EPROM, EEPROM) or Flash memory.Volatile memory can be random access memory (Random Access Memory, RAM), and it is used as outside high Speed caching.By exemplary but be not restricted explanation, the RAM of many forms can use, such as static RAM (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), Synchronous Dynamic Random Access Memory (Synchronous DRAM, SDRAM), double data speed synchronous dynamic RAM (Double Data Rate SDRAM, DDRSDRAM), enhancement mode Synchronous Dynamic Random Access Memory (Enhanced SDRAM, ESDRAM), synchronized links Dynamic random access memory (Synchlink DRAM, SLDRAM) and direct rambus random access memory (Direct Ram bus RAM, DRRAM).The memorizer 702 of the system and method that the embodiment of the present invention describes is intended to include but not limited to this A little and arbitrarily other applicable type memorizer.
In some embodiments, memorizer 702 stores following element, executable module or data structure, or Their subset of person, or their superset: operating system 7021 and application program 7022.
Wherein, operating system 7021, comprise various system program, such as ccf layer, core library layer, driving layer etc., be used for Realize various basic business and process hardware based task.Application program 7022, comprises various application program, such as media Player (Media Player), browser (Browser) etc., be used for realizing various applied business.Realize the embodiment of the present invention The program of method may be embodied in application program 7022.
In embodiments of the present invention, by calling program or the instruction of memorizer 702 storage, concrete, can be application The program of storage or instruction in program 7022, processor 701 is for obtaining the first two field picture with the first exposure parameter exposure, with the Two exposure parameter exposures obtain the second two field picture, and wherein, described first two field picture and the second two field picture are photographic head continuous acquisition Image；According to predetermined local viewfinder range, obtain the office overlapped in described second two field picture with local viewfinder range Portion's image；Described first two field picture and described topography are merged, generates preview image.
The method that the invention described above embodiment discloses can apply in processor 701, or is realized by processor 701. Processor 701 is probably a kind of IC chip, has the disposal ability of signal.During realizing, said method each Step can be completed by the instruction of the integrated logic circuit of the hardware in processor 701 or software form.Above-mentioned process Device 701 can be general processor, digital signal processor (Digital Signal Processor, DSP), special integrated electricity Road (Application Specific Integrated Circuit, ASIC), ready-made programmable gate array (Field Programmable Gate Array, FPGA) or other PLDs, discrete gate or transistor logic, Discrete hardware components.Can realize or perform disclosed each method, step and the logic diagram in the embodiment of the present invention.General The processor etc. that processor can be microprocessor or this processor can also be any routine.In conjunction with embodiment of the present invention institute The step of disclosed method can be embodied directly in hardware decoding processor and perform, or with the hardware in decoding processor And software module combination execution completes.Software module may be located at random access memory, and flash memory, read only memory are able to programme read-only In the storage medium that this areas such as memorizer or electrically erasable programmable memorizer, depositor are ripe.This storage medium is positioned at Memorizer 702, processor 701 reads the information in memorizer 702, completes the step of said method in conjunction with its hardware.
It is understood that embodiments described herein can use hardware, software, firmware, middleware, microcode or its Combination realizes.Realizing for hardware, processing unit can be implemented in one or more special IC (Application Specific Integrated Circuits, ASIC), digital signal processor (Digital Signal Processing, DSP), digital signal processing appts (DSP Device, DSPD), programmable logic device (Programmable Logic Device, PLD), field programmable gate array (Field-Programmable Gate Array, FPGA), general processor, Controller, microcontroller, microprocessor, for performing in other electronic unit or a combination thereof of herein described function.
Software is realized, can be by performing the module (such as process, function etc.) of function described in the embodiment of the present invention Realize the technology described in the embodiment of the present invention.Software code is storable in performing in memorizer and by processor.Storage Device can within a processor or realize outside processor.
Alternatively, described processor 701 is additionally operable to: obtaining the first two field picture, with second with the first exposure parameter exposure Before exposure parameter exposure obtains the second two field picture, obtain the first odd-numbered frame image and first even frame of photographic head continuous acquisition Image；Described first odd-numbered frame image is carried out automatic exposure calculating, obtains the first exposure parameter；The first exposure according to user Described first even frame image is exposed calculating by regulation operation, obtains the second exposure parameter.
Preferably, described processor 701 is additionally operable to: obtaining the first two field picture, with second with the first exposure parameter exposure Before exposure parameter exposure obtains the second two field picture, obtain the first exposure parameter of user preset；Obtain the second of user preset Exposure parameter.
Preferably, described processor 701 is additionally operable to: obtaining the first two field picture, with second with the first exposure parameter exposure After exposure parameter exposure obtains the second two field picture, described first two field picture is carried out automatic exposure calculating, obtains the 3rd exposure Parameter；It is exposed calculating to described second two field picture according to the second exposure regulation operation of user, obtains the 4th exposure parameter.
Preferably, described processor 701 is additionally operable to: generating after preview image, with the 3rd exposure parameter exposure acquisition the Three odd-numbered frame images, obtain the 3rd even frame image, wherein, described 3rd odd-numbered frame image and the with the 4th exposure parameter exposure Three even frame images are the image of photographic head continuous acquisition；According to predetermined local viewfinder range, obtain the described 3rd even The topography overlapped with local viewfinder range in number two field picture；To described 3rd odd-numbered frame image and described 3rd even frame figure Topography in Xiang merges, and generates preview image.
Preferably, described processor 701 is additionally operable to: obtaining the first odd-numbered frame image and first that photographic head is continuously shot Before even frame image, it is defined as local viewfinder range by preview interface meets the region imposed a condition；Or, receive user The first of local viewfinder range is arranged operation, operation is set according to described first and determines local viewfinder range；Or, by preview Interface meets the region that imposes a condition and is defined as local viewfinder range, and in preview interface, demarcate the described local determined take Scape scope；Receiving the adjustment operation of the user's described local viewfinder range to demarcating, the region after adjusting is defined as local and takes Scape scope.
Preferably, described processor 701 carries out automatic exposure calculating to described first odd-numbered frame image, obtains the first exposure During parameter, specifically for: determine the first brightness value of described first odd-numbered frame image, and the object brightness that automatic exposure is corresponding Value；By described first brightness value and described target brightness value are calculated, obtain the first exposure parameter.
Preferably, described first even frame image is entered by described processor 701 according to the first exposure regulation operation of user Row exposure calculating, when obtaining the second exposure parameter, specifically for: determine target light exposure according to the first exposure regulation operation of user Brightness, determines the second brightness value of the first even frame image；By to described second brightness value and described target light exposure brightness Calculate, obtain the second exposure parameter.
Preferably, described first two field picture and described topography are merged by described processor 701, generate preview graph During picture, specifically for: determine the first topography overlapped in described first two field picture with described local viewfinder range；Utilize institute State the first topography that the topography extracted in the second two field picture replaces in the first two field picture；With the first frame after replacing Image is preview image.
Mobile terminal 700 is capable of each process that in previous embodiment, mobile terminal realizes, for avoiding repeating, here Repeat no more.
The mobile terminal of the embodiment of the present invention, obtains two two field pictures of continuous acquisition with different exposure parameters, and will wherein Topography in one two field picture extracts and merges generation preview image with another two field picture.Due to this two frame obtained Image is that the therefore exposure effect obtained under different exposure parameters is different, correspondingly merges in the preview image of generation and integrates with The exposure effect of topography the most different from the exposure effect in other region in image, it is achieved thereby that only treat exposure diagram The purpose that in Xiang, the exposure effect in certain region is adjusted, therefore the quality of captured exposure image can be promoted.
Embodiment six
With reference to Fig. 6, it is shown that the structured flowchart of the mobile terminal of the embodiment of the present invention six.
Mobile terminal in the embodiment of the present invention can be mobile phone, panel computer, personal digital assistant (Personal Digital Assistant, PDA) or vehicle-mounted computer etc..
Mobile terminal in Fig. 6 includes radio frequency (RadioFrequency, RF) circuit 810, memorizer 820, input block 830, display unit 840, processor 860, voicefrequency circuit 870, WiFi (WirelessFidelity) module 880 and power supply 890.
Wherein, input block 830 can be used for receiving numeral or the character information of user's input, and produces and mobile terminal The user setup of 800 and function control relevant signal input.Specifically, in the embodiment of the present invention, this input block 830 can To include contact panel 8301.Contact panel 8301, also referred to as touch screen, can collect user thereon or neighbouring touch operation (such as user uses any applicable object such as finger, stylus or adnexa operation on contact panel 8301), and according in advance The formula first set drives corresponding attachment means.Optionally, contact panel 8301 can include touch detecting apparatus and touch control Two parts of device processed.Wherein, the touch orientation of touch detecting apparatus detection user, and detect the signal that touch operation brings, will Signal sends touch controller to；Touch controller receives touch information from touch detecting apparatus, and is converted into contact Coordinate, then give this processor 860, and order that processor 860 sends can be received and performed.Furthermore, it is possible to use electricity The polytypes such as resistive, condenser type, infrared ray and surface acoustic wave realize contact panel 8301.Except contact panel 8301, defeated Enter unit 830 and can also include other input equipments 8302, other input equipments 8302 can include but not limited to physical keyboard, One or more in function key (such as volume control button, switch key etc.), trace ball, mouse, action bars etc..
Wherein, display unit 840 can be used for showing the information inputted by user or the information being supplied to user and movement The various menu interfaces of terminal.Display unit 840 can include display floater 8401, optionally, can use LCD or organic light emission The forms such as diode (Organic Light-Emitting Diode, OLED) configure display floater 8401.
It should be noted that contact panel 8301 can cover display floater 8401, formed and touch display screen, when this touch display screen Detect thereon or after neighbouring touch operation, send processor 860 to determine the type of touch event, with preprocessor 860 provide corresponding visual output according to the type of touch event on touch display screen.
Touch display screen and include Application Program Interface viewing area and conventional control viewing area.This Application Program Interface viewing area And the arrangement mode of this conventional control viewing area does not limit, can be arranged above and below, left-right situs etc. can be distinguished two and show Show the arrangement mode in district.This Application Program Interface viewing area is displayed for the interface of application program.Each interface is permissible The interface elements such as the icon and/or the widget desktop control that comprise at least one application program.This Application Program Interface viewing area It can also be the empty interface not comprising any content.This conventional control viewing area is for showing the control that utilization rate is higher, such as, The application icons etc. such as settings button, interface numbering, scroll bar, phone directory icon.
Wherein processor 860 is the control centre of mobile terminal, utilizes each of various interface and the whole mobile phone of connection Individual part, is stored in the software program in first memory 8201 and/or module by running or performing, and calls and be stored in Data in second memory 8202, perform the various functions of mobile terminal and process data, thus carrying out whole to mobile terminal Body monitors.Optionally, processor 860 can include one or more processing unit.
In embodiments of the present invention, by call the software program and/or module stored in this first memory 8201 and/ Or the data in this second memory 8202, processor 860 is for obtaining the first two field picture with the first exposure parameter exposure, with the Two exposure parameter exposures obtain the second two field picture, and wherein, described first two field picture and the second two field picture are photographic head continuous acquisition Image；According to predetermined local viewfinder range, obtain the office overlapped in described second two field picture with local viewfinder range Portion's image；Described first two field picture and described topography are merged, generates preview image.
Alternatively, described processor 860 is additionally operable to: obtaining the first two field picture, with second with the first exposure parameter exposure Before exposure parameter exposure obtains the second two field picture, obtain the first odd-numbered frame image and first even frame of photographic head continuous acquisition Image；Described first odd-numbered frame image is carried out automatic exposure calculating, obtains the first exposure parameter；The first exposure according to user Described first even frame image is exposed calculating by regulation operation, obtains the second exposure parameter.
Preferably, described processor 860 is additionally operable to: obtaining the first two field picture, with second with the first exposure parameter exposure Before exposure parameter exposure obtains the second two field picture, obtain the first exposure parameter of user preset；Obtain the second of user preset Exposure parameter.
Preferably, described processor 860 is additionally operable to: obtaining the first two field picture, with second with the first exposure parameter exposure After exposure parameter exposure obtains the second two field picture, described first two field picture is carried out automatic exposure calculating, obtains the 3rd exposure Parameter；It is exposed calculating to described second two field picture according to the second exposure regulation operation of user, obtains the 4th exposure parameter.
Preferably, described processor 860 is additionally operable to: generating after preview image, with the 3rd exposure parameter exposure acquisition the Three odd-numbered frame images, obtain the 3rd even frame image, wherein, described 3rd odd-numbered frame image and the with the 4th exposure parameter exposure Three even frame images are the image of photographic head continuous acquisition；According to predetermined local viewfinder range, obtain the described 3rd even The topography overlapped with local viewfinder range in number two field picture；To described 3rd odd-numbered frame image and described 3rd even frame figure Topography in Xiang merges, and generates preview image.
Preferably, described processor 860 is additionally operable to: obtaining the first odd-numbered frame image and first that photographic head is continuously shot Before even frame image, it is defined as local viewfinder range by preview interface meets the region imposed a condition；Or, receive user The first of local viewfinder range is arranged operation, operation is set according to described first and determines local viewfinder range；Or, by preview Interface meets the region that imposes a condition and is defined as local viewfinder range, and in preview interface, demarcate the described local determined take Scape scope；Receiving the adjustment operation of the user's described local viewfinder range to demarcating, the region after adjusting is defined as local and takes Scape scope.
Preferably, described processor 860 carries out automatic exposure calculating to described first odd-numbered frame image, obtains the first exposure During parameter, specifically for: determine the first brightness value of described first odd-numbered frame image, and the object brightness that automatic exposure is corresponding Value；By described first brightness value and described target brightness value are calculated, obtain the first exposure parameter.
Preferably, described first even frame image is entered by described processor 860 according to the first exposure regulation operation of user Row exposure calculating, when obtaining the second exposure parameter, specifically for: determine target light exposure according to the first exposure regulation operation of user Brightness, determines the second brightness value of the first even frame image；By to described second brightness value and described target light exposure brightness Calculate, obtain the second exposure parameter.
Preferably, described first two field picture and described topography are merged by described processor 860, generate preview graph During picture, specifically for: determine the first topography overlapped in described first two field picture with described local viewfinder range；Utilize institute State the first topography that the topography extracted in the second two field picture replaces in the first two field picture；With the first frame after replacing Image is preview image.
The mobile terminal of the embodiment of the present invention carries out image exposure, obtains two frames of continuous acquisition with different exposure parameters Image, and the topography in a wherein two field picture is extracted merge generation preview image with another two field picture.By It is that the therefore exposure effect obtained under different exposure parameters is different in this two two field picture obtained, correspondingly merges the pre-of generation The exposure effect of the topography integrated with in image look at is the most different from the exposure effect in other region in image, thus realizes Only treat the purpose that in exposure image, the exposure effect in certain region is adjusted, therefore captured exposure image can be promoted Quality.
For device embodiment, due to itself and embodiment of the method basic simlarity, so describe is fairly simple, relevant Part sees the part of embodiment of the method and illustrates.
Not intrinsic with any certain computer, virtual system or the miscellaneous equipment phase of image exposure scheme provided herein Close.Various general-purpose systems can also be used together with based on teaching in this.As described above, structure has side of the present invention Structure required by the system of case is apparent from.Additionally, the present invention is also not for any certain programmed language.Should be bright That in vain, it is possible to use various programming languages realize the content of invention described herein, and is above done language-specific retouches Stating is the preferred forms in order to disclose the present invention.
In description mentioned herein, illustrate a large amount of detail.It is to be appreciated, however, that the enforcement of the present invention Example can be put into practice in the case of not having these details.In some instances, it is not shown specifically known method, structure And technology, in order to do not obscure the understanding of this description.
Similarly, it will be appreciated that one or more in order to simplify that the disclosure helping understands in each inventive aspect, exist Above in the description of the exemplary embodiment of the present invention, each feature of the present invention is grouped together into single enforcement sometimes In example, figure or descriptions thereof.But, the method for the disclosure should not be construed to reflect an intention that i.e. required guarantor The application claims feature more more than the feature being expressly recited in each claim protected.More precisely, such as right As claim is reflected, inventive aspect is all features less than single embodiment disclosed above.Therefore, it then follows tool Claims of body embodiment are thus expressly incorporated in this detailed description of the invention, the conduct of the most each claim itself The independent embodiment of the present invention.
It will appreciated by the skilled person that and the module in the equipment in embodiment can be carried out adaptively Change and they are arranged in one or more equipment different from this embodiment.Can be the module in embodiment or list Unit or assembly are combined into a module or unit or assembly, and can put them in addition multiple submodule or subelement or Sub-component.In addition at least some in such feature and/or process or unit excludes each other, can use any Combine all features disclosed in this specification (including adjoint claim, summary and accompanying drawing) and so disclosed appoint Where method or all processes of equipment or unit are combined.Unless expressly stated otherwise, this specification (includes adjoint power Profit requires, summary and accompanying drawing) disclosed in each feature can be carried out generation by providing identical, equivalent or the alternative features of similar purpose Replace.
Although additionally, it will be appreciated by those of skill in the art that embodiments more described herein include other embodiments Some feature included by rather than further feature, but the combination of the feature of different embodiment means to be in the present invention's Within the scope of and form different embodiments.Such as, in detail in the claims, embodiment required for protection one of arbitrarily Can mode use in any combination.
The all parts embodiment of the present invention can realize with hardware, or to run on one or more processor Software module realize, or with combinations thereof realize.It will be understood by those of skill in the art that and can use in practice Microprocessor or digital signal processor (DSP) realize some in image exposure scheme according to embodiments of the present invention or The some or all functions of the whole parts of person.The present invention is also implemented as performing method as described herein Point or whole equipment or device program (such as, computer program and computer program).Such realize this Bright program can store on a computer-readable medium, or can be to have the form of one or more signal.Such Signal can be downloaded from internet website and obtain, or provides on carrier signal, or provides with any other form.
The present invention will be described rather than limits the invention to it should be noted above-described embodiment, and ability Field technique personnel can design alternative embodiment without departing from the scope of the appended claims.In the claims, Any reference marks that should not will be located between bracket is configured to limitations on claims.Word " comprises " and does not excludes the presence of not Arrange element in the claims or step.Word "a" or "an" before being positioned at element does not excludes the presence of multiple such Element.The present invention and can come real by means of including the hardware of some different elements by means of properly programmed computer Existing.If in the unit claim listing equipment for drying, several in these devices can be by same hardware branch Specifically embody.Word first, second and third use do not indicate that any order.These word explanations can be run after fame Claim.
Those of ordinary skill in the art are it is to be appreciated that combine that the disclosed embodiments in the embodiment of the present invention describe is each The unit of example and algorithm steps, it is possible to being implemented in combination in of electronic hardware or computer software and electronic hardware.These Function performs with hardware or software mode actually, depends on application-specific and the design constraint of technical scheme.Specialty Technical staff specifically should can be used for using different methods to realize described function to each, but this realization should not Think beyond the scope of this invention.
Those skilled in the art is it can be understood that arrive, for convenience and simplicity of description, the system of foregoing description, The specific works process of device and unit, is referred to the corresponding process in preceding method embodiment, does not repeats them here.
In embodiment provided herein, it should be understood that disclosed apparatus and method, can be passed through other Mode realizes.Such as, device embodiment described above is only schematically, such as, the division of described unit, it is only A kind of logic function divides, actual can have when realizing other dividing mode, the most multiple unit or assembly can in conjunction with or Person is desirably integrated into another system, or some features can be ignored, or does not performs.Another point, shown or discussed is mutual Between coupling direct-coupling or communication connection can be the INDIRECT COUPLING by some interfaces, device or unit or communication link Connect, can be electrical, machinery or other form.
The described unit illustrated as separating component can be or may not be physically separate, shows as unit The parts shown can be or may not be physical location, i.e. may be located at a place, or can also be distributed to multiple On NE.Some or all of unit therein can be selected according to the actual needs to realize the mesh of the present embodiment scheme 's.
It addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it is also possible to It is that unit is individually physically present, it is also possible to two or more unit are integrated in a unit.
If described function is using the form realization of SFU software functional unit and as independent production marketing or use, permissible It is stored in a computer read/write memory medium.Based on such understanding, technical scheme is the most in other words The part contributing prior art or the part of this technical scheme can embody with the form of software product, this meter Calculation machine software product is stored in a storage medium, including some instructions with so that a computer equipment (can be individual People's computer, server, or the network equipment etc.) perform all or part of step of method described in each embodiment of the present invention. And aforesaid storage medium includes: USB flash disk, portable hard drive, ROM, RAM, magnetic disc or CD etc. are various can store program code Medium.
The above, the only detailed description of the invention of the present invention, but protection scope of the present invention is not limited thereto, and any Those familiar with the art, in the technical scope that the invention discloses, can readily occur in change or replace, should contain Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with scope of the claims.

Claims (18)

1. an image exposure method, it is characterised in that described method includes:
Obtain the first two field picture with the first exposure parameter exposure, obtain the second two field picture, wherein, institute with the second exposure parameter exposure State the first two field picture and image that the second two field picture is photographic head continuous acquisition；
According to predetermined local viewfinder range, obtain the Local map overlapped in described second two field picture with local viewfinder range Picture；
Described first two field picture and described topography are merged, generates preview image.
Method the most according to claim 1, it is characterised in that obtaining the first two field picture with the first exposure parameter exposure, Before obtaining the second two field picture with the second exposure parameter exposure, also include:
Obtain the first odd-numbered frame image and the first even frame image of photographic head continuous acquisition；
Described first odd-numbered frame image is carried out automatic exposure calculating, obtains the first exposure parameter；
It is exposed calculating to described first even frame image according to the first exposure regulation operation of user, obtains the second exposure ginseng Number.
Method the most according to claim 1, it is characterised in that obtaining the first two field picture with the first exposure parameter exposure, Before obtaining the second two field picture with the second exposure parameter exposure, also include:
Obtain the first exposure parameter of user preset；
Obtain the second exposure parameter of user preset.
Method the most according to claim 1, it is characterised in that obtain the first two field picture with the first exposure parameter exposure, with After second exposure parameter exposure obtains the second two field picture, also include:
Described first two field picture is carried out automatic exposure calculating, obtains the 3rd exposure parameter；
It is exposed calculating to described second two field picture according to the second exposure regulation operation of user, obtains the 4th exposure parameter.
Method the most according to claim 4, it is characterised in that after generating preview image, also include:
Obtain the 3rd odd-numbered frame image with the 3rd exposure parameter exposure, obtain the 3rd even frame figure with the 4th exposure parameter exposure Picture, wherein, described 3rd odd-numbered frame image and the image that the 3rd even frame image is photographic head continuous acquisition；
According to predetermined local viewfinder range, obtain the office overlapped in described 3rd even frame image with local viewfinder range Portion's image；
Topography in described 3rd odd-numbered frame image and described 3rd even frame image is merged, generates preview graph Picture.
Method the most according to claim 2, it is characterised in that obtaining the first odd-numbered frame image that photographic head is continuously shot Before the first even frame image, also include:
It is defined as local viewfinder range by preview interface meets the region imposed a condition；Or,
Receive user and operation is set to the first of local viewfinder range, operation is set according to described first and determines model of locally finding a view Enclose；Or,
It is defined as local viewfinder range by preview interface meets the region that imposes a condition, and demarcates in preview interface and determine Described local viewfinder range；Receiving the adjustment operation of the user's described local viewfinder range to demarcating, the region after adjusting is true It is set to local viewfinder range.
Method the most according to claim 2, it is characterised in that described first odd-numbered frame image is carried out actinograph Calculate, obtain the step of the first exposure parameter, including:
Determine the first brightness value of described first odd-numbered frame image, and the target brightness value that automatic exposure is corresponding；
By described first brightness value and described target brightness value are calculated, obtain the first exposure parameter.
Method the most according to claim 2, it is characterised in that operate described first according to the first exposure regulation of user Even frame image is exposed calculating, and obtains the step of the second exposure parameter, including:
Target light exposure brightness is determined according to the first exposure regulation operation of user；
Determine the second brightness value of the first even frame image；
By described second brightness value and described target light exposure brightness are calculated, obtain the second exposure parameter.
Method the most according to claim 1, it is characterised in that described described first two field picture and described topography are entered Row merges, and generates preview image and includes:
Determine the first topography overlapped in described first two field picture with described local viewfinder range；
The topography extracted in described second two field picture is utilized to replace the first topography in the first two field picture；
With the first two field picture after replacement as preview image.
10. a mobile terminal, it is characterised in that described mobile terminal includes:
First image collection module, for obtaining the first two field picture with the first exposure parameter exposure, with the second exposure parameter exposure Obtain the second two field picture, wherein, described first two field picture and the image that the second two field picture is photographic head continuous acquisition；
Topography's acquisition module, for according to predetermined local viewfinder range, obtain in described second two field picture with office The topography that portion's viewfinder range overlaps；
Merge module, for described first two field picture and described topography are merged, generate preview image.
11. mobile terminals according to claim 10, it is characterised in that described mobile terminal also includes:
Second image collection module, for obtaining the first frame figure in described first image collection module with the first exposure parameter exposure Picture, obtains before the second two field picture with the second exposure parameter exposure, obtain photographic head continuous acquisition the first odd-numbered frame image and First even frame image；
First exposure parameter determines module, for described first odd-numbered frame image is carried out automatic exposure calculating, obtains the first exposure Optical parameter；
Second exposure parameter determines module, for entering described first even frame image according to the first of user the exposure regulation operation Row exposure calculating, obtains the second exposure parameter.
12. mobile terminals according to claim 10, it is characterised in that described mobile terminal also includes:
First parameter acquisition module, for obtaining the first frame figure in described first image collection module with the first exposure parameter exposure Picture, before obtaining the second two field picture with the second exposure parameter exposure, obtains the first exposure parameter of user preset；
Second parameter acquisition module, for obtaining the second exposure parameter of user preset.
13. mobile terminals according to claim 10, it is characterised in that described mobile terminal also includes:
3rd exposure parameter determines module, for exposing acquisition first in described first image collection module with the first exposure parameter Two field picture, after obtaining the second two field picture with the second exposure parameter exposure, carries out automatic exposure calculating to described first two field picture, Obtain the 3rd exposure parameter；
4th exposure parameter determines module, for exposing described second two field picture according to the second of user the exposure regulation operation Optical oomputing, obtains the 4th exposure parameter.
14. mobile terminals according to claim 13, it is characterised in that described mobile terminal also includes:
3rd image collection module, after generating preview image in described merging module, obtains with the 3rd exposure parameter exposure 3rd odd-numbered frame image, with the 4th exposure parameter exposure obtain the 3rd even frame image, wherein, described 3rd odd-numbered frame image and 3rd even frame image is the image of photographic head continuous acquisition；
Second local image collection module, for according to predetermined local viewfinder range, obtains described 3rd even frame figure The topography overlapped with local viewfinder range in Xiang；
Second merges module, for carrying out the topography in described 3rd odd-numbered frame image and described 3rd even frame image Merge, generate preview image.
15. mobile terminals according to claim 11, it is characterised in that described mobile terminal also includes:
First range determination module, for obtaining, in described second image collection module, the first odd-numbered frame that photographic head is continuously shot Before image and the first even frame image, it is defined as local viewfinder range by preview interface meets the region imposed a condition；Or Person,
Second range determination module, arranges operation for receiving user to the first of local viewfinder range, sets according to described first Put operation and determine local viewfinder range；Or,
3rd range determination module, for being defined as local viewfinder range by preview interface meets the region imposed a condition, and The described local viewfinder range determined is demarcated in preview interface；Receive the adjustment of the user's described local viewfinder range to demarcating Operation, the region after adjusting is defined as local viewfinder range.
16. mobile terminals according to claim 10, it is characterised in that described first exposure parameter determines that module includes:
Brightness value determines submodule, and for determining the first brightness value of described first odd-numbered frame image, and automatic exposure is corresponding Target brightness value；
Calculating sub module, for by calculating described first brightness value and described target brightness value, obtains the first exposure Optical parameter.
17. mobile terminals according to claim 10, it is characterised in that described second exposure parameter determines that module includes:
Brightness value determines submodule, for determining target light exposure brightness according to the first of user the exposure regulation operation；Determine first Second brightness value of even frame image；
Calculating sub module, for by calculating described second brightness value and described target light exposure brightness, obtains second Exposure parameter.
18. mobile terminals according to claim 10, it is characterised in that described merging module includes:
Topography determines submodule, for determining the first game overlapped in described first two field picture with described local viewfinder range Portion's image；
Extract submodule, for utilizing the topography extracted in described second two field picture to replace first in the first two field picture Topography；
Preview image determines submodule, for the first two field picture after replacement as preview image.
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