CN106131449A - A kind of photographic method and mobile terminal - Google Patents

A kind of photographic method and mobile terminal Download PDF

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Publication number
CN106131449A
CN106131449A CN201610604811.1A CN201610604811A CN106131449A CN 106131449 A CN106131449 A CN 106131449A CN 201610604811 A CN201610604811 A CN 201610604811A CN 106131449 A CN106131449 A CN 106131449A
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image
region
target
partial exposure
target partial
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CN106131449B (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
    • 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
    • H04N23/73—Circuitry for compensating brightness variation in the scene by influencing the exposure time
    • 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
    • H04N23/741—Circuitry for compensating brightness variation in the scene by increasing the dynamic range of the image compared to the dynamic range of the electronic image sensors

Abstract

Embodiments providing a kind of photographic method and mobile terminal, wherein, described method, application has the mobile terminal of the first photographic head and second camera, and described method includes: obtain a frame preview image of preview interface output of taking pictures；Based on described preview image, determine target partial exposure region；Based on described target partial exposure region, calculate the target light exposure parameter that described target partial exposure region is corresponding；Control described first photographic head and second camera respectively to be exposed according to default auto exposure parameter and described target light exposure parameter, generate the first image and the second image；Carry out image synthesis process based on described first image and the second image, generate target image.The embodiment of the present invention can realize regulating exposure effect for the regional area of image.

Description

A kind of photographic method and mobile terminal
Technical field
The present embodiments relate to communication technical field, particularly relate to a kind of photographic method and mobile terminal.
Background technology
Along with the development of electronic technology, the requirement of the quality of mobile terminal shooting photo is improved constantly, by user Want to make mobile terminal shoot high-quality photo, need to regulate the exposure parameter of photographic head, so that photographic head can be correct Exposure, thus shoot high-quality photo.
At present, most mobile terminal all supports automatic exposure regulation and Manual exposure regulation, but the most automatically exposes Light regulation or Manual exposure regulation, be all adjusted whole picture, when causing for the regulation exposure of certain region, its The exposure effect in his region can be affected, and overexposure occurs or owes the phenomenon exposed；Such as, when shooting people, the light of human face Dark, it is desirable to when the region that face is corresponding is lightened, the region that in picture, other are brighter will become brighter, it may appear that overexposure Phenomenon so that the exposure effect of whole picture is bad.
Summary of the invention
The embodiment of the present invention provides a kind of photographic method, with solve existing photographic method can only be by regulating whole picture Exposure parameter regulate some region of exposure effect, thus cause other regions occur overexposure or owe expose problem.
First aspect, it is provided that a kind of method taken pictures, described method is applied to have the first photographic head and the second shooting Head mobile terminal, described method includes: obtain a frame preview image of preview interface output of taking pictures；Based on described preview image, Determine target partial exposure region；Based on described target partial exposure region, calculate described target partial exposure region corresponding Target light exposure parameter；Control described first photographic head and second camera respectively according to default exposure parameter and described target light exposure Parameter is exposed, and generates the first image and the second image；Carry out at image synthesis based on described first image and the second image Reason, generates target image.
Second aspect, it is provided that a kind of mobile terminal, described mobile terminal includes the first photographic head and second camera, institute State mobile terminal also to include: image collection module, for obtaining a frame preview image of preview interface output of taking pictures；Region is true Cover half block, for the described preview image obtained based on described image collection module, determines target partial exposure region；Parameter meter Calculate module, for the described target partial exposure region determined based on described area determination module, calculate described target local and expose The target light exposure parameter that light region is corresponding；Image generation module, for controlling described first photographic head and second camera respectively It is exposed according to default auto exposure parameter and described target light exposure parameter, generates the first image and the second image；Image closes Become module, for carrying out image synthesis process based on described first image and the second image, generate target image.
So, in the embodiment of the present invention, a frame preview image of preview interface output of being taken pictures by acquisition；Determine acquisition Target partial exposure region in preview image, and calculate the target light exposure parameter that described target partial exposure region is corresponding； Control described first photographic head and second camera the most respectively according to default auto exposure parameter and described target light exposure parameter It is exposed, generates the first image and the second image；Described first image and the second image are carried out image synthesis process, generates Target image；Such that it is able to the regional area for image regulates exposure effect.
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 a kind of photographic method embodiment of the present invention；
Fig. 2 is the flow chart of a kind of photographic method embodiment of the present invention；
Fig. 3 is the structured flowchart of a kind of mobile terminal embodiment of the present invention；
Fig. 4 is the structured flowchart of a kind of mobile terminal embodiment of the present invention；
Fig. 5 is the block diagram of a kind of mobile terminal embodiment of the present invention；
Fig. 6 is the structural representation of a kind of mobile terminal embodiment of the present invention.
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 steps of a kind of photographic method embodiment of the present invention, specifically can include as follows Step:
Step 101, obtain take pictures preview interface output a frame preview image.
Mobile phone users is when using mobile terminal to take pictures, due to spot for photography, shooting angle and shooting time Etc. factor, frequently can lead in the image that mobile terminal is shot, the phenomenon that subregion is dark or brighter, i.e. part occur The exposure effect in region is bad；In prior art, user can only regulate this dark by regulating the exposure bias value of whole image Or the exposure effect of brighter areas；After user regulates exposure bias value, mobile terminal, according to the exposure bias value received, arranges exposure Optical parameter, to regulate the exposure effect of whole image；Therefore, cause when regulating the exposure effect of this brighter or darker area, The exposure effect in other regions can be affected；Thus, the embodiment of the present invention provides one can regulate image local area exposure effect The method of fruit so that when regulating brighter or darker area, do not affect the exposure effect in other regions.
In the embodiment of the present invention, when user uses mobile terminal to start camera function, mobile terminal starts rearmounted first Photographic head and second camera, the first photographic head and second camera, according to identical light measuring method such as central authorities photometry, are carried out Light-metering, and calculate corresponding default auto exposure parameter according to identical presetting method, wherein, the presetting method of exposure parameter is Prior art, is not repeated herein；Being exposed according still further to corresponding exposure parameter, generate corresponding image, mobile terminal is by the The image that the image of one photographic head generation and second camera generate, processes, exports a frame preview image, then taking pictures Preview interface show this preview image, after the preview interface taken pictures shows this preview image, mobile terminal can obtain this Preview image, to determine that this preview image needs to regulate the region of exposure effect.Wherein, the first photographic head that mobile terminal is rearmounted Being two identical photographic head with second camera, both can be arranged on same horizontal line, it is also possible to is arranged on same On bar vertical line；The exposure parameter of the first photographic head and second camera is to be calculated by two mutual independent modules.
Step 102, based on preview image, determine target partial exposure region.
After acquisition for mobile terminal preview image, mobile terminal can detect this preview image automatically, will detect preview graph The region in region dark in Xiang or brighter, as needing to regulate the region of exposure effect, it is also possible to by preview image Important area is as by needing to regulate the region of exposure effect, when being personage such as reference object, by character facial in preview image Region is as needing to regulate the region of exposure effect；Mobile terminal can also be according to the operation of user, region user selected As needing to regulate the region of exposure effect；Then need regulate exposure effect region, be defined as target partial exposure district Territory.
Step 103, based on target partial exposure region, calculate the target light exposure parameter that target partial exposure region is corresponding.
After mobile terminal determines the target partial exposure region of preview image, mobile terminal can expose for this target local Image corresponding to light region is analyzed, and calculates the target light exposure parameter that this target partial exposure region is corresponding, it is also possible to according to User, for the result of the regulation in this target partial exposure region, calculates the target light exposure ginseng that this target partial exposure region is corresponding Number, so that one of them photographic head of mobile terminal is exposed according to target light exposure parameter.
Step 104, control the first photographic head and second camera according to default auto exposure parameter and target light exposure respectively Parameter is exposed, and generates the first image and the second image.
After target light exposure parameter has calculated, one of them photographic head that can control in two photographic head exposes according to target Optical parameter is exposed, and another photographic head is exposed according to default exposure parameter；Wherein, default auto exposure parameter be by The exposure parameter calculated according to presetting method, presets auto exposure parameter according to the change of the image luminance information of camera collection Change；The default default auto exposure parameter from exposure parameter Yu second camera of the first photographic head, can be identical, it is also possible to Different；Concrete, a kind of Exposure mode is, can control the default auto exposure parameter that the first photographic head sends out according to correspondence and carry out Exposure, generates the first image, controls second camera and is exposed according to target light exposure parameter, generates the second image；Another kind of Exposure mode is, can control the first photographic head and be exposed according to target light exposure parameter, generates the first image, controls second and takes the photograph As head is exposed according to corresponding default auto exposure parameter, generate the second image.
Step 105, carry out image synthesis process based on the first image and the second image, generate target image.
First photographic head generates the first image and after second camera generates the second head portrait, and mobile terminal can be to the first figure Picture and the second image carry out synthesis process, concrete, and mobile terminal can be respectively directed to the mesh in the first image and the second image The image marking partial exposure region corresponding processes, and corresponding for other regions in the first image and the second image Image process；Target light exposure area image after processing and after processing the image in other regions synthesize, generate Target image, for example, it is possible to be respectively provided with the first image object partial exposure region and the second image object partial exposure region Weight, and other regions of the first image and the weight in second other regions of image are set, close according to the weight information arranged Become target image.Wherein, other regions refer to the region in addition to target partial exposure region.
The embodiment of the present invention, a frame preview image of preview interface output of being taken pictures by acquisition；Determine the preview graph of acquisition Target partial exposure region in Xiang, and calculate the target light exposure parameter that target partial exposure region is corresponding；Control the most respectively Make the first photographic head and second camera to be exposed according to default exposure parameter and described target light exposure parameter, generate the first figure Picture and the second image；First image and the second image are carried out image synthesis process, generates target image；Such that it is able to for figure The regional area regulation exposure effect of picture.
Embodiment two
With reference to Fig. 2, it is shown that the flow chart of a kind of photographic method embodiment of the present invention, specifically can include walking as follows Rapid:
Step 201, obtain take pictures preview interface output a frame preview image.
When the camera function of mobile terminal is opened, control the first photographic head and second camera respectively according to corresponding pre- If auto exposure parameter is exposed, then the head portrait that the image of the first photographic head generation and second camera generate is synthesized Process, on mobile terminal takes pictures preview interface, show the two field picture after this synthesis.
Step 202, judge whether to receive in the selection operation taking pictures in preview interface, if then performing step 203, if Otherwise perform step 204.
After showing preview image in the preview interface of taking pictures of mobile terminal, preview image can be examined by mobile terminal Survey, automatically determine out target partial exposure region；Mobile terminal can also determine according to user in the operation of preview interface of taking pictures Go out target partial exposure region, whether receive user in the selection operation taking pictures in preview interface accordingly, it would be desirable to prejudge.
Step 203, the region selecting operation corresponding is defined as target partial exposure region.
When mobile terminal receives user's selection operation in preview interface of taking pictures, determine that user have selected preview graph Need to regulate a region of exposure effect in Xiang, and determine position and the size in region in region that user selects, will be pre- Look at correspondence position in image, and equal-sized region is defined as target partial exposure region.
Step 204, judge whether it is that the first automatically determines the mode in target partial exposure region, if then performing step 205, if otherwise performing step 208.
When mobile terminal does not receives user's selection operation in preview interface of taking pictures, it is judged that the non-selected need of user The region of exposure effect to be regulated, therefore, mobile terminal can detect target partial exposure region automatically；Wherein, mobile whole The mode in end detection target partial exposure region includes multiple.
Step 205, preview image is divided into the image-region of the same area of the first predetermined number.
In the embodiment of the present invention, when mobile terminal determines that the mode automatically determining target partial exposure region is the first side During formula, preview image being divided into multiple region of the same area, area and first predetermined number in each region are equal, its In, the first predetermined number is for dividing preview image, and wherein, the area in a region is equal to the first predetermined number such as 10* 10 pixels, the first predetermined number can be arranged according to the real area of preview image；Such as: 960*480 pixel during preview image , the first predetermined number can be 96*48 pixel, then preview image will be divided into 100 regions, the size in the most each region For 96*48 pixel.
Step 206, calculate the average brightness value of each image-region respectively.
According to the first predetermined number, after preview image is divided into multiple region of the same area, calculate each image respectively The brightness value of each pixel that region comprises, then according to the brightness value of each pixel, calculates the brightest of each image-region Angle value, and record average brightness value corresponding to each image-region as can record in the form of a list.
Step 207, image-region corresponding for value average brightness value in the first predetermined luminance range is defined as mesh Mark partial exposure region.
One by one by average brightness value and the contrast of the first predetermined luminance of each image-region, wherein, the first predetermined luminance includes First dark space predetermined luminance and the first clear zone predetermined luminance, the first dark space predetermined luminance and the first clear zone predetermined luminance all corresponding one Individual range of luminance values, both can set according to practical situation；As the scope of the first dark space predetermined luminance value could be arranged to 0～ 20, the scope of the first clear zone predetermined luminance value could be arranged to 200～255；Will each image-region average brightness value respectively Contrast with the first dark space predetermined luminance range and the first clear zone predetermined luminance range, if there is taking of an average brightness value It is worth in the first dark space predetermined luminance range, or, in the first clear zone predetermined luminance range；Can be by this average brightness value pair The image-region answered is defined as target partial exposure region.If the value having multiple average brightness value is preset in the first dark space simultaneously In brightness range, region corresponding for the average brightness value of value minimum can be defined as target partial exposure region, such as, scheme As the average brightness value in region 1,2,3,4 is 10,8,19,2, then image-region 4 is set to target partial exposure region；If simultaneously There is the value of multiple average brightness value in the first clear zone predetermined luminance range, can be corresponding by average brightness value maximum for value Region be defined as target partial exposure region, such as, the average brightness value of image-region 1,2,3,4 is 200,251,222, 201, then image-region 2 is set to target partial exposure region；If the value that there is the average brightness value of A image-region exists simultaneously In first dark space brightness range, the value of the average brightness value of B image-region is in the first dark space brightness range；Can obtain pre- Look at the brightness histogram information of image, according to brightness histogram information, add up value in whole preview image bright in the first dark space Quantity A of pixel in the range of degree, and, value is quantity B of pixel in the first clear zone brightness range；If quantity A is more than number Amount B, then be defined as target partial exposure region by A image-region；If quantity A is less than quantity B, then B image-region is defined as Target partial exposure region.
Step 208, corresponding relation based on default pixel position Yu brightness value, be divided into second by preview image pre- If the image-region of quantity.
In the embodiment of the present invention, when mobile terminal determines that the mode automatically determining target partial exposure region is the second side During formula, first calculate the brightness value comprising all of pixel in preview image, and record position and the pixel of each pixel The corresponding relation of brightness value, wherein, the position relationship of pixel can represent with row and column, if the size of preview image is 960* 480 pixels, then this preview image has 480 row and 960 row, if the brightness value of a pixel of the 20th row the 150th row is 170, then Corresponding relation can be to be recorded as the form such as 20-150-170 of row-column-brightness value.Then by brightness value in same scope Pixel is divided into same luminance area, according still further to the second predetermined number, this luminance area is divided into multiple image-region； Wherein, the second predetermined number is the quantity of pixel, in the light of actual conditions arranges, and such as, the size of preview image is 960*480 Pixel, i.e. comprises 460800 pixels, then the second predetermined number can be set to 4608 pixels, it is also possible to is set to 1152 pixels Point.
Step 209, value image-region in the range of the second predetermined luminance value is defined as target partial exposure region； Wherein, the span of the brightness value of the pixel of each image-region is different.
In the embodiment of the present invention, image-region is that the span of the brightness value according to pixel divides, the most same The pixel of individual image-region can be adjacent pixel, it is also possible to be non-conterminous pixel；And same image-region The brightness value of each pixel is probably different；The span of the brightness value that each image-region is corresponding is also different.Will The span of the brightness value of each image-region contrasts with the scope of the second predetermined luminance value, wherein, and the second predetermined luminance Value brightness includes the second dark space predetermined luminance and the second clear zone predetermined luminance, and the second dark space predetermined luminance and the second clear zone are preset bright The all corresponding range of luminance values of degree, both can set according to practical situation, the second dark space predetermined luminance range and first dark District's predetermined luminance range, and the second clear zone brightness range can be identical with the first clear zone brightness range, it is also possible to different, such as Second dark space brightness range can be set to 2～18, and the second clear zone brightness range can be set to 188～255；Will each image-region Brightness range contrast with the second dark space predetermined luminance range and the second clear zone predetermined luminance range respectively, if exist one The value of the brightness range of image-region in the second dark space predetermined luminance range, or, in the second clear zone predetermined luminance range； This image-region can be defined as target partial exposure region.If the value having the brightness range of multiple image-region exists simultaneously In first dark space predetermined luminance range, the image-region that brightness range values is minimum can be defined as target partial exposure region； If have the value of the brightness range of multiple image-region in the second clear zone predetermined luminance range simultaneously, can be by image-region The region that the average brightness value of brightness range values maximum is corresponding is defined as target partial exposure region；If there is A image district simultaneously The value of the brightness range in territory is in the second dark space brightness range, and the value of the brightness range of B image-region is bright in the second dark space In the range of degree；The brightness histogram information of preview image can be obtained, according to brightness histogram information, add up whole preview image Middle value is quantity A of pixel in the second dark space brightness range, and, value is the number of pixel in the second clear zone brightness range Amount B；If quantity A is more than quantity B, then A image-region is defined as target partial exposure region；If quantity A is less than quantity B, then B image-region is defined as target partial exposure region.
It addition, after mobile terminal automatically determines target partial exposure region, mobile terminal can be automatically determined by user again Region be adjusted, the region that user is finally regulated by mobile terminal is defined as target partial exposure region.
Step 210, judge whether to receive in the regulation operation taking pictures in preview interface, if then performing step 211, if Otherwise perform step 213.
After mobile terminal determines target partial exposure region, mobile terminal determines the mesh that target partial exposure region is corresponding The mode of mark exposure parameter has multiple, and one way in which is, can according to image information corresponding to target partial exposure region, Automatically target light exposure parameter is calculated；Another way is, can operate according to the regulation of user, calculate target light exposure parameter, Regulation operation whether is received in preview interface, so that it is according to regulation operation that mobile terminal determines accordingly, it would be desirable to judgement is taken pictures Calculate target light exposure parameter, or automatically calculate target light exposure parameter.
Step 211, based on regulation operation, determine target light exposure offset.
When mobile terminal receives the regulation operation taking pictures in preview interface, determine that user is for target partial exposure district The exposure effect in territory is regulated, and the mode of the exposure effect that user regulates target partial exposure region includes multiple, wherein, A kind of mode regulating exposure effect can be by regulating exposure bias value regulation exposure effect, and exposure user regulated is mended Repay value and be defined as target light exposure offset, such as, the slider bar of slip exposure compensating, or, in the preview interface taken pictures on Lower slider, mobile terminal can determine, according to the distance of user's slip and the direction of slip, the exposure bias value that user regulates.
Step 212, based on target light exposure offset, calculate the target light exposure parameter that target partial exposure region is corresponding.
In the embodiment of the present invention, the exposure parameter that different exposure bias value correspondence photographic head is different, wherein, exposure parameter The parameter such as including exposure row, exposure gain, such as, when exposure bias value is+1, corresponding exposure row is 3072 row, and exposure increases Benefit is 12.000；After mobile terminal determines target light exposure offset, the target light exposure of correspondence can be determined according to target compensation value Parameter, so that photographic head can be exposed according to target light exposure parameter.
Step 213, with target partial exposure region for light-metering key area, the second image is carried out light-metering, obtains light-metering Data.
When mobile terminal does not receives the regulation operation taking pictures in preview interface, determine that user does not regulates target local and exposes The exposure effect in light region, therefore, mobile terminal can automatically determine target according to the image information in target partial exposure region Exposure parameter, concrete, with target partial exposure region for light-metering key area, the second image is carried out light-metering, obtains light-metering Data, to calculate target light exposure parameter；First image can also be carried out light-metering.The concrete method calculating photometric data, including: By the brightness statistics information of each pixel in target partial exposure region and other regions in addition to target partial exposure region The brightness statistics information of each pixel, is weighted summation operation according to weighted value corresponding in weight matrix, obtains light-metering number According to；Wherein, corresponding with each pixel in target partial exposure region in weight matrix weighted value is more than and each picture in other regions The weighted value that element is corresponding.In the embodiment of the present invention, weight matrix is the matrix comprising each weighted value, each weighted value in weight matrix Respectively with the pixel one_to_one corresponding of preview image, such as, preview image size is 960*480 pixel, then weight matrix is The matrix of 960*480, the weighted value that pixel that target area comprises is corresponding, it is all higher than the pixel that other regions comprise corresponding Weighted value；When image is carried out light-metering, gradually by the brightness statistics information of the pixel in image, it is multiplied by weight matrix Corresponding weighted value, obtain the brightness statistics information that each pixel is new, brightness statistics information new for each pixel be added, obtain whole The photometric data of individual image, i.e. obtains the brightness value of whole image.
Step 214, based on photometric data, calculate the target light exposure parameter that target partial exposure region is corresponding.
Mobile terminal passes through light-metering, after obtaining photometric data；Again by bright with corresponding goal-selling for the photometric data that obtains Angle value contrasts, and the brightness value of whole image will contrast with preset target brightness value, thus calculates target light exposure Parameter；Wherein, when a preset target brightness value that is image each regional exposure effect is preferable, the brightness value of whole image；Different The corresponding no exposure parameter of brightness value, can be according to the difference between the brightness value of the image obtained and preset target brightness value Value, determines that photographic head needs the target light exposure parameter of regulation, and wherein, target light exposure parameter includes exposure row and exposure gain；Example As, the brightness value of the image obtained by light-metering is 18, then corresponding exposure behavior 210, exposure gain is 1；Goal-selling is bright Angle value is 30, and corresponding exposure behavior 267, exposure gain is 1.195；Target light exposure parameter will expose behavior 57, exposure Gain is 0.195, i.e. the exposure row of photographic head needs to increase by 57 row, and exposure gain needs to increase by 0.195.
Step 215, control the first photographic head and second camera according to default auto exposure parameter and target light exposure respectively Parameter is exposed, and generates the first image and the second image.
After target light exposure parameter has calculated, one of them photographic head that can control in two photographic head exposes according to target Optical parameter is exposed, and another photographic head is exposed according to default auto exposure parameter；Concrete, a kind of Exposure mode It is can to control the default auto exposure parameter that the first photographic head sends out according to correspondence and be exposed, generate the first image, controls the Two photographic head are exposed according to target light exposure parameter, generate the second image；Another kind of Exposure mode is can to control first and take the photograph As head is exposed according to target light exposure parameter, generate the first image, control second camera and automatically expose according to corresponding presetting Optical parameter is exposed, and generates the second image.
Step 216, carry out image synthesis process based on the first image and the second image, generate target image.
After first image and the second image generate, need the first image and the second image are synthesized, generate target figure Picture, the mode of synthesis target image includes multiple, and the method for image synthesis includes multiple, with the first photographic head according to presetting automatically Exposure parameter is exposed, and second camera is exposed according to target light exposure parameter, the first image of generation and second Image illustrates；Owing to second camera is exposed according to target light exposure parameter, therefore, target office in the second image The image exposure effect that the exposure effect of the image that exposure area, portion is corresponding is more corresponding than target partial exposure region in the first image Good, and the exposure effect of the image that other regions in addition to target partial exposure region are corresponding in the second image, than the first image In image exposure weak effect corresponding to other regions in addition to target partial exposure region, therefore, by the first image and the second figure As a kind of mode of synthesis target image is: extract the first intermediate image that in the second image, target partial exposure region is corresponding； The second intermediate image that other image-regions of extracting in the first image in addition to target partial exposure region are corresponding；In the middle of first Image and the second intermediate image carry out image synthesis, generate target image；Using the image in other regions in the first image as mesh The image in other regions of logo image, in the second image, the image in target partial exposure region exposes as target local in target image The image in light region.
By the another way of the first image and the second synthesis target image image it is, by the first image and the second image The image corresponding with target partial exposure region, presets weighted value synthesis according to first, obtains first area image；By the first figure The image in other regions in addition to target partial exposure region in picture and the second image, presets weighted value according to second and closes Become, obtain second area image；Wherein, first preset weight and include target partial exposure region correspondence image in the first image First weight, and, the first weight of target partial exposure region correspondence image in the second image, the first weight of the second image is big The first weight in the first image；Second presets other regions that weight includes in the first image in addition to target partial exposure region Second weight of correspondence image, and, in the second image second of other region correspondence image in addition to target partial exposure region Weight, the second weight of the second image is less than the second weight of the first image；First image object partial exposure region is corresponding Image corresponding to image and the second image object partial exposure region, compute weighted according to corresponding weight, obtain the One area image；Equally, it is also carried out for other regions in addition to target partial exposure region in the first image and the second image Identical computing obtains second area image；First area image and second area image are carried out image synthesis again, generates mesh Logo image.
It addition, the target light exposure reference that one of them photographic head calculates automatically according to mobile terminal is exposed, clapping According to preview interface in show the target image of synthesis after, user can also be for the effect of the exposure in target partial exposure region Again regulate exposure bias value.
The embodiment of the present invention, a frame preview image of preview interface output of being taken pictures by acquisition；May then pass through in advance Image of looking at carries out brightness value calculating, automatically determines target partial exposure region, it is also possible to select operation to determine acquisition according to user Preview image in target partial exposure region, it is also possible to be manual with automatic combination mode, determine target partial exposure Region, it is simple to user operation；The same mode calculating target light exposure parameter corresponding to target partial exposure region can be automatic, Can also be manual, it is also possible to be manual and automatic combination；Control the first photographic head and second camera the most respectively according in advance If exposure parameter and target light exposure parameter are exposed, generate the first image and the second image；Further according to weight by the first image Carry out image synthesis process with the second image, generate target image, such that it is able to the regional area for preview image regulates exposure Light effect, does not results in other regions simultaneously and overexposure occurs or owe the phenomenon exposed.
It should be noted that for embodiment of the method, in order to be briefly described, therefore it is all expressed as a series of action group Closing, but those skilled in the art should know, the embodiment of the present invention is not limited by described sequence of movement, because depending on According to the embodiment of the present invention, some step can use other orders or carry out simultaneously.Secondly, those skilled in the art also should Knowing, embodiment described in this description belongs to preferred embodiment, and the involved action not necessarily present invention implements Necessary to example.
Embodiment three
With reference to Fig. 3, it is shown that the structured flowchart of the present invention a kind of mobile terminal embodiment, specifically can include such as lower mold Block: image collection module 31, area determination module 32, parameter calculating module 33, image generation module 34 and image synthesis unit 35, wherein,
Image collection module 31, for obtaining a frame preview image of preview interface output of taking pictures.
Area determination module 32, for the preview image obtained based on image collection module 31, determines target partial exposure Region.
Parameter calculating module 33, for the target partial exposure region determined based on area determination module 32, calculates target The target light exposure parameter that partial exposure region is corresponding.
Image generation module 34, joins according to default automatic exposure for controlling the first photographic head and second camera respectively Number and target light exposure parameter are exposed, and generate the first image and the second image.
Image synthesis unit 35, for carrying out image synthesis process based on the first image and the second image, generates target figure Picture.
The embodiment of the present invention, a frame preview image of preview interface output of being taken pictures by acquisition；Determine the preview graph of acquisition Target partial exposure region in Xiang, and calculate the target light exposure parameter that target partial exposure region is corresponding；Control the most respectively Make the first photographic head and second camera to be exposed according to default exposure parameter and target light exposure parameter, generate the first image and Second image；First image and the second image are carried out image synthesis process, generates target image；Such that it is able to for image Regional area regulation exposure effect.
With reference to Fig. 4, on the basis of Fig. 3, the submodule that each module of mobile terminal is comprised, and each submodule comprises Unit and effect illustrate.
In the embodiment of the present invention, area determination module 42 includes: first area divides submodule 421, and brightness value calculates son Module 422, first object region determines submodule 423, and second area divides submodule 424, and the second target area determines submodule Block 425, selects operation to receive submodule 426 and the 3rd target area determines submodule, wherein,
First area divides submodule 421, pre-for the preview image that image collection module 41 obtains is divided into first If the image-region of the same area of quantity.
Brightness value calculating sub module 422, is divided, by first area, each image that submodule 421 divides for calculating respectively The average brightness value in region.
First object region determines submodule 423, for by value in the range of the first predetermined luminance value by brightness value The image-region that the average brightness value of calculating sub module 422 calculating is corresponding is defined as target partial exposure region.
Second area divides submodule 424, for corresponding relation based on default pixel position Yu brightness value, and will figure It is divided into the image-region of the second predetermined number as acquisition module 41 obtains institute's preview image.
Second target area determines submodule 425, for by value in the range of the second predetermined luminance value by the secondth district Territory divides the image-region of submodule 424 division and is defined as target partial exposure region.
Operation is selected to receive submodule 426, for receiving mobile phone users in the selection operation taking pictures in preview interface；
3rd target area determines submodule 427, for operation being selected to receive the selection operation that submodule 426 receives Corresponding region is defined as target partial exposure region.
In the embodiment of the present invention, parameter calculating module 43 includes: photometric parameter determines submodule 431, and first calculates submodule Block 423, regulation operation receives submodule 433, and offset determines submodule 434 and the second calculating sub module 435, wherein,
Photometric parameter determines submodule 431, for described target partial exposure region for light-metering key area, to described Second image carries out light-metering, obtains photometric data, concrete, for by each pixel bright in described target partial exposure region The brightness statistics information of each pixel in degree statistical information and other regions in addition to described target partial exposure region, according to power In weight matrix, corresponding weighted value is weighted summation operation, obtains described photometric data；Wherein, in described weight matrix with institute State the weighted value that in target partial exposure region, each pixel is corresponding and be more than the weighted value corresponding with each pixel in other regions described.
First calculating sub module 432, for determining, based on photometric parameter, the photometric data that submodule 431 determines, calculates mesh The target light exposure parameter that mark partial exposure region is corresponding.
Regulation operation receives submodule 433, for receiving the parameter regulation operation of mobile phone users.
Offset determines submodule 434, for receiving, based on regulation operation, the regulation operation that submodule 432 receives, determines Target light exposure offset.
Second calculating sub module 435, determines, based on offset, the target light exposure offset that submodule 434 determines, calculates mesh The target light exposure parameter that mark partial exposure region is corresponding.
In the embodiment of the present invention, image synthesis unit 45 includes: the first image zooming-out submodule 451, the second image zooming-out Submodule 452, first object image synthon module 453, first area image determines submodule 454, and second area image is true Stator modules 455 and the second target image synthon module 456, wherein,
First image zooming-out submodule 451, in target partial exposure region is corresponding in extraction the second image first Between image.
Second image zooming-out submodule 452, for other figures extracted in the first image in addition to target partial exposure region As the second intermediate image that region is corresponding.
First object image synthon module 453, for carrying out image conjunction by the first intermediate image and the second intermediate image Become, generate target image.
First area image determines submodule 454, for by the first image and the second image with target partial exposure district The image that territory is corresponding, presets weighted value synthesis according to first, obtains first area image.
Second area image determines submodule 455, for removing target partial exposure district in the first image and the second image The image in other overseas regions, presets weighted value according to second and synthesizes, obtain second area image.
Second target image synthon module 456, for carrying out image conjunction by first area image and second area image Become, generate target image.
The embodiment of the present invention, a frame preview image of preview interface output of being taken pictures by acquisition；May then pass through in advance Image of looking at carries out brightness value calculating, automatically determines target partial exposure region, it is also possible to select operation to determine acquisition according to user Preview image in target partial exposure region, it is also possible to be manual with automatic combination mode, determine target partial exposure Region, it is simple to user operation；The same mode calculating target light exposure parameter corresponding to target partial exposure region can be automatic, Can also be manual, it is also possible to be manual and automatic combination；Control the first photographic head and second camera the most respectively according in advance If exposure parameter and target light exposure parameter are exposed, generate the first image and the second image；Further according to weight by the first image Carry out image synthesis process with the second image, generate target image, such that it is able to the regional area for preview image regulates exposure Light effect, does not results in other regions simultaneously and overexposure occurs or owe the phenomenon exposed.
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.
Embodiment four
Fig. 5 is the block diagram of the mobile terminal of another embodiment of the present invention.Mobile terminal 500 shown in Fig. 5 includes: at least One processor 501, memorizer 502, at least one network interface 504 and user interface 503.Each in mobile terminal 500 Assembly is coupled by bus system 505.It is understood that bus system 505 is led to for realizing the connection between these assemblies Letter.Bus system 505, in addition to including data/address bus, also includes power bus, controls bus and status signal bus in addition.But it is For the sake of understanding explanation, various buses being all designated as bus system 505 in Figure 5, mobile terminal 500 also includes picture shooting assembly 506, picture shooting assembly 506 includes the first photographic head and second camera.
Wherein, picture shooting assembly 506 obtains the view data of photographed scene by the first photographic head and second camera.
Wherein, user interface 503 can include display, keyboard or pointing device (such as, mouse, trace ball (trackball), touch-sensitive plate or touch screen etc..
The memorizer 502 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- OnlyMemory, ROM), programmable read only memory (ProgrammableROM, PROM), Erasable Programmable Read Only Memory EPROM (ErasablePROM, EPROM), Electrically Erasable Read Only Memory (ElectricallyEPROM, EEPROM) or sudden strain of a muscle Deposit.Volatile memory can be random access memory (RandomAccessMemory, RAM), and it is used as outside the most slow Deposit.By exemplary but be not restricted explanation, the RAM of many forms can use, such as static RAM (StaticRAM, SRAM), dynamic random access memory (DynamicRAM, DRAM), Synchronous Dynamic Random Access Memory (SynchronousDRAM, SDRAM), double data speed synchronous dynamic RAM (DoubleDataRate SDRAM, DDRSDRAM), enhancement mode Synchronous Dynamic Random Access Memory (Enhanced SDRAM, ESDRAM), synchronized links Dynamic random access memory (SynchlinkDRAM, SLDRAM) and direct rambus random access memory (DirectRambusRAM, DRRAM).The memorizer 502 of the system and method that the embodiment of the present invention describes is intended to include but does not limits In these and the memorizer of any other applicable type.
In some embodiments, memorizer 502 stores following element, executable module or data structure, or Their subset of person, or their superset: operating system 5021 and application program 5022.
Wherein, operating system 5021, 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 5022, comprises various application program, such as media Player (MediaPlayer), browser (Browser) etc., be used for realizing various applied business.Realize embodiment of the present invention side The program of method may be embodied in application program 5022.
In embodiments of the present invention, by calling program or the instruction of memorizer 502 storage, concrete, can be application The program stored in program 5022 or instruction, processor 501 is for obtaining a frame preview image of preview interface output of taking pictures；Base In preview image, determine target partial exposure region；Based on target partial exposure region, calculate target partial exposure region corresponding Target light exposure parameter；Control the first photographic head and second camera respectively according to default auto exposure parameter and target light exposure Parameter is exposed, and generates the first image and the second image；Image synthesis process is carried out based on the first image and the second image, raw Become target image.
The method that the invention described above embodiment discloses can apply in processor 501, or is realized by processor 501. Processor 501 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 501 or software form.Above-mentioned process Device 501 can be general processor, digital signal processor (DigitalSignalProcessor, DSP), special IC (ApplicationSpecific IntegratedCircuit, ASIC), ready-made programmable gate array (FieldProgrammableGateArray, FPGA) or other PLDs, discrete gate or transistor logic Device, discrete hardware components.Can realize or perform disclosed each method, step and the box in the embodiment of the present invention Figure.The processor etc. that general processor can be microprocessor or this processor can also be any routine.In conjunction with the present invention The step of the method disclosed in embodiment can be embodied directly in hardware decoding processor and perform, or uses decoding processor In hardware and software module combination execution complete.Software module may be located at random access memory, and flash memory, read only memory can In the storage medium that this areas such as program read-only memory or electrically erasable programmable memorizer, depositor are ripe.This storage Medium is positioned at memorizer 502, and processor 501 reads the information in memorizer 502, completes the step of said method in conjunction with its hardware Suddenly.
It is understood that the embodiment of the present invention describe these embodiments can use hardware, software, firmware, middleware, Microcode or a combination thereof realize.Realizing for hardware, processing unit can be implemented in one or more special IC (ApplicationSpecificIntegratedCircuits, ASIC), digital signal processor (DigitalSignalProcessing, DSP), digital signal processing appts (DSPDevice, DSPD), programmable logic device (ProgrammableLogicDevice, PLD), field programmable gate array (Field-ProgrammableGateArray, FPGA), general processor, controller, microcontroller, microprocessor, for performing other electronics list of herein described function In unit or a combination thereof.
Software is realized, can come 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.Memorizer can Within a processor or to realize outside processor.
Alternatively, processor 501 is additionally operable to: preview image is divided into the image of the same area of the first predetermined number Region；Calculate the average brightness value of each image-region respectively；By value average brightness value in the first predetermined luminance range Corresponding image-region is defined as target partial exposure region.
Alternatively, processor 501 is additionally operable to: corresponding relation based on default pixel position Yu brightness value, by preview Image division is the image-region of the second predetermined number；Value image-region in the range of the second predetermined luminance value is defined as Target partial exposure region；Wherein, the span of the brightness value of the pixel of each image-region is different.
Alternatively, processor 501 is additionally operable to: receive mobile phone users in the selection operation taken pictures in preview interface；Will The region selecting operation corresponding is defined as target partial exposure region.
Alternatively, processor 501 is additionally operable to: with described target partial exposure region for light-metering key area, to described Two images carry out light-metering, obtain photometric data；Based on photometric data, calculate the target light exposure ginseng that target partial exposure region is corresponding Number.
Alternatively, processor 501 is additionally operable to: by the brightness statistics information of each pixel in described target partial exposure region With the brightness statistics information of each pixel in other regions in addition to described target partial exposure region, according to right in weight matrix The weighted value answered is weighted summation operation, obtains described photometric data；Wherein, in described weight matrix with described target locally The weighted value that in exposure area, each pixel is corresponding is more than the weighted value corresponding with each pixel in other regions described.
Alternatively, processor 501 is additionally operable to: receive the parameter regulation operation of mobile phone users；Based on regulation operation, really Set the goal exposure bias value；Based on target light exposure offset, calculate the target light exposure parameter that target partial exposure region is corresponding.
Alternatively, processor 501 is additionally operable to: extract the first middle graph that in the second image, target partial exposure region is corresponding Picture；The second intermediate image that other image-regions of extracting in the first image in addition to target partial exposure region are corresponding；By first Intermediate image and the second intermediate image carry out image synthesis, generate target image.
Alternatively, processor 501 is additionally operable to: by corresponding with target partial exposure region in the first image and the second image Image, presets weighted value synthesis according to first, obtains first area image；First image and the second image will remove target local The image in other regions outside exposure area, presets weighted value according to second and synthesizes, obtain second area image；By first Area image and second area image carry out image synthesis, generate target image.
Mobile terminal 500 is capable of each process that in previous embodiment, mobile terminal realizes, for avoiding repeating, here Repeat no more.In the embodiment of the present invention, a frame preview image of preview interface output of being taken pictures by acquisition；Determine the preview of acquisition Target partial exposure region in image, and calculate the target light exposure parameter that target partial exposure region is corresponding；Then distinguish Control the first photographic head and second camera to be exposed according to default auto exposure parameter and target light exposure parameter, generate first Image and the second image；First image and the second image are carried out image synthesis process, generates target image；Such that it is able to for The regional area regulation exposure effect of image.
Embodiment five
Fig. 6 is the structural representation of the mobile terminal of another embodiment of the present invention.Specifically, the mobile terminal in Fig. 6 Can be mobile phone, panel computer, personal digital assistant (PersonalDigital Assistant, PDA) or vehicle-mounted computer etc..
Mobile terminal includes radio frequency (RadioFrequency, the RF) circuit 610 in Fig. 6, memorizer 620, input block 630, display unit 640, processor 660, voicefrequency circuit 670, WiFi (WirelessFidelity) module 680 and power supply 690, Additionally, mobile terminal also includes that picture shooting assembly 600, picture shooting assembly 600 include the first photographic head and second camera.
Wherein, picture shooting assembly 600 obtains the view data of photographed scene by the first photographic head and second camera.
Wherein, input block 630 can be used for receiving numeral or the character information of user's input, and produces and mobile terminal The user setup of 600 and function control relevant signal input.Specifically, in the embodiment of the present invention, this input block 630 can To include contact panel 631.Contact panel 631, 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 631), and according in advance The formula set drives corresponding attachment means.Optionally, contact panel 631 can include touch detecting apparatus and touch controller Two parts.Wherein, the touch orientation of touch detecting apparatus detection user, and detect the signal that touch operation brings, by signal Send touch controller to；Touch controller receives touch information from touch detecting apparatus, and is converted into contact coordinate, Give this processor 660 again, and order that processor 660 sends can be received and performed.Furthermore, it is possible to employing resistance-type, The polytypes such as condenser type, infrared ray and surface acoustic wave realize contact panel 631.Except contact panel 631, input block 630 can also include other input equipments 632, and other input equipments 632 can include but not limited to physical keyboard, function key One or more in (such as volume control button, switch key etc.), trace ball, mouse, action bars etc..
Wherein, display unit 640 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 640 can include display floater 641, optionally, can use LCD or organic light emission The forms such as diode (OrganicLight-EmittingDiode, OLED) configure display floater 641.
It should be noted that contact panel 631 can cover display floater 641, formed and touch display screen, when this touch display screen is examined Measure thereon or after neighbouring touch operation, send processor 660 to determine the type of touch event, with preprocessor 660 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 660 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 621 and/or module by running or performing, and calls and be stored in Data in second memory 622, perform the various functions of mobile terminal and process data, thus carrying out mobile terminal 600 Integral monitoring.Optionally, processor 660 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 621 and/ Or the data in this second memory 622, processor 660 is for obtaining a frame preview image of preview interface output of taking pictures；Base In preview image, determine target partial exposure region；Based on target partial exposure region, calculate target partial exposure region corresponding Target light exposure parameter；Control the first photographic head and second camera respectively to join according to default auto exposure parameter and target light exposure Number is exposed, and generates the first image and the second image；Image synthesis process is carried out based on the first image and the second image, raw Become target image.
Alternatively, processor 660 is additionally operable to: preview image is divided into the image district of the same area of the first predetermined number Territory；Calculate the average brightness value of each image-region respectively；By value average brightness value pair in the first predetermined luminance range The image-region answered is defined as target partial exposure region.
Alternatively, processor 660 is additionally operable to: corresponding relation based on default pixel position Yu brightness value, by preview Image division is the image-region of the second predetermined number；Value image-region in the range of the second predetermined luminance value is defined as Target partial exposure region；Wherein, the span of the brightness value of the pixel of each image-region is different.
Alternatively, processor 660 is additionally operable to: receive mobile phone users in the selection operation taken pictures in preview interface；Will The region selecting operation corresponding is defined as target partial exposure region.
Alternatively, processor 660 is additionally operable to: with described target partial exposure region for light-metering key area, to described Two images carry out light-metering, obtain photometric data；Based on photometric data, calculate the target light exposure ginseng that target partial exposure region is corresponding Number.
Alternatively, processor 660 is additionally operable to: by the brightness statistics information of each pixel in described target partial exposure region With the brightness statistics information of each pixel in other regions in addition to described target partial exposure region, according to right in weight matrix The weighted value answered is weighted summation operation, obtains described photometric data；Wherein, in described weight matrix with described target locally The weighted value that in exposure area, each pixel is corresponding is more than the weighted value corresponding with each pixel in other regions described.
Alternatively, processor 660 is additionally operable to: receive the parameter regulation operation of mobile phone users；Based on regulation operation, really Set the goal exposure bias value；Based on target light exposure offset, calculate the target light exposure parameter that target partial exposure region is corresponding.
Alternatively, processor 660 is additionally operable to: extract the first middle graph that in the second image, target partial exposure region is corresponding Picture；The second middle graph that other image-regions of extracting in described first image in addition to described target partial exposure region are corresponding Picture；Described first intermediate image and the second intermediate image are carried out image synthesis, generates target image.
Alternatively, processor 660 is additionally operable to: by described first image and the second image with described target partial exposure district The image that territory is corresponding, presets weighted value synthesis according to first, obtains first area image；
By the image in other regions in addition to target partial exposure region in described first image and the second image, according to Two preset weighted value synthesizes, and obtains second area image；First area image and second area image are carried out image conjunction Become, generate target image.
Mobile terminal is capable of each process that in previous embodiment, mobile terminal realizes, for avoiding repeating, the most not Repeat again.In the embodiment of the present invention, a frame preview image of preview interface output of being taken pictures by acquisition；Determine the preview graph of acquisition Target partial exposure region in Xiang, and calculate the target light exposure parameter that target partial exposure region is corresponding；Control the most respectively Make the first photographic head and second camera to be exposed according to default auto exposure parameter and target light exposure parameter, generate the first figure Picture and the second image；First image and the second image are carried out image synthesis process, generates target image；Such that it is able to for figure The regional area regulation exposure effect of picture.
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. a photographic method, application has the mobile terminal of the first photographic head and second camera, it is characterised in that described side Method includes:
Obtain a frame preview image of preview interface output of taking pictures；
Based on described preview image, determine target partial exposure region；
Based on described target partial exposure region, calculate the target light exposure parameter that described target partial exposure region is corresponding；
Control described first photographic head and second camera respectively according to default auto exposure parameter and described target light exposure parameter It is exposed, generates the first image and the second image；
Carry out image synthesis process based on described first image and the second image, generate target image.
Method the most according to claim 1, it is characterised in that described based on described preview image, determines that target local exposes The step in light region, including:
Described preview image is divided into the image-region of the same area of the first predetermined number；
Calculate the average brightness value of each described image-region respectively；
Image-region corresponding for the value described average brightness value in the first predetermined luminance range is defined as described target office Exposure area, portion.
Method the most according to claim 1, it is characterised in that described based on described preview image, determines that target local exposes The step in light region, including:
Corresponding relation based on default pixel position Yu brightness value, is divided into the second predetermined number by described preview image Image-region；
Value image-region in the range of the second predetermined luminance value is defined as described target partial exposure region；
Wherein, the span of the brightness value of the pixel of each described image-region is different.
Method the most according to claim 1, it is characterised in that described based on described preview image, determines that target local exposes The step in light region, including:
Receive mobile phone users in the selection operation taken pictures in preview interface；
The described region selecting operation corresponding is defined as described target partial exposure region.
5. according to the method according to any one of claim 2 to 4, it is characterised in that described based on described target partial exposure Region, calculates the step of target light exposure parameter corresponding to described target partial exposure region, including:
With described target partial exposure region for light-metering key area, described second image is carried out light-metering, obtains photometric data；
Based on described photometric data, calculate the target light exposure parameter that described target partial exposure region is corresponding.
Method the most according to claim 5, it is characterised in that described with described target partial exposure region for light-metering emphasis Region, carries out light-metering to described second image, obtains the step of photometric data, including:
By in described target partial exposure region each pixel brightness statistics information and in addition to described target partial exposure region The brightness statistics information of each pixel in other regions, be weighted summation fortune according to weighted value corresponding in weight matrix Calculate, obtain described photometric data；
Wherein, corresponding with each pixel in described target partial exposure region in described weight matrix weighted value more than with described its The weighted value that in his region, each pixel is corresponding.
7. according to the method according to any one of claim 2 to 4, it is characterised in that described based on described target partial exposure Region, calculates the step of target light exposure parameter corresponding to described target partial exposure region, including:
Receive the parameter regulation operation of described mobile phone users；
Based on described regulation operation, determine target light exposure offset；
Based on described target light exposure offset, calculate the target light exposure parameter that described target partial exposure region is corresponding.
Method the most according to claim 1, it is characterised in that described carry out figure based on described first image and the second image As synthesis processes, generate the step of target image, including:
Extract the first intermediate image that described in described second image, target partial exposure region is corresponding；
The second middle graph that other image-regions of extracting in described first image in addition to described target partial exposure region are corresponding Picture；
Described first intermediate image and the second intermediate image are carried out image synthesis, generates target image.
Method the most according to claim 1, it is characterised in that described carry out figure based on described first image and the second image As synthesis processes, generate the step of target image, including:
By image corresponding with described target partial exposure region in described first image and the second image, preset power according to first Weight values synthesizes, and obtains first area image；
By the image in other regions in addition to described target partial exposure region in described first image and the second image, according to Two preset weighted value synthesizes, and obtains second area image；
Described first area image and second area image are carried out image synthesis, generates target image.
10. a mobile terminal, including the first photographic head and second camera, it is characterised in that described mobile terminal also includes:
Image collection module, for obtaining a frame preview image of preview interface output of taking pictures；
Area determination module, for the described preview image obtained based on described image collection module, determines target partial exposure Region；
Parameter calculating module, for the described target partial exposure region determined based on described area determination module, calculates described The target light exposure parameter that target partial exposure region is corresponding；
Image generation module, for control respectively described first photographic head and second camera according to default auto exposure parameter and Described target light exposure parameter is exposed, and generates the first image and the second image；
Image synthesis unit, for carrying out image synthesis process based on described first image and the second image, generates target image.
11. mobile terminals according to claim 10, it is characterised in that described area determination module, including:
First area divides submodule, and the described preview image for described image collection module being obtained is divided into first and presets The image-region of the same area of quantity；
Brightness value calculating sub module, is divided, by described first area, each described image district that submodule divides for calculating respectively The average brightness value in territory；
First object region determines submodule, for by value being calculated by described brightness value in the range of the first predetermined luminance value The image-region that the described average brightness value of submodule calculating is corresponding is defined as described target partial exposure region.
12. mobile terminals according to claim 10, it is characterised in that described area determination module, including:
Second area divides submodule, for corresponding relation based on default pixel position Yu brightness value, by described image Acquisition module obtains described preview image and is divided into the image-region of the second predetermined number；
Second target area determines submodule, for by value being drawn by described second area in the range of the second predetermined luminance value The image-region that molecular modules divides is defined as described target partial exposure region.
13. mobile terminals according to claim 10, it is characterised in that described area determination module, including:
Operation is selected to receive submodule, for receiving mobile phone users in the selection operation taking pictures in preview interface；
3rd target area determines submodule, for selecting operation to receive the described selection operation correspondence that submodule receives by described Region be defined as described target partial exposure region.
14. according to the mobile terminal according to any one of claim 11 to 13, it is characterised in that described parameter calculating module, Including:
Photometric parameter determines submodule, for described target partial exposure region for light-metering key area, to described second figure As carrying out light-metering, obtain photometric data；
First calculating sub module, for determining, based on described photometric parameter, the described photometric data that submodule determines, calculates described The target light exposure parameter that target partial exposure region is corresponding.
15. mobile terminals according to claim 14, it is characterised in that
Described photometric parameter determines submodule, for by the brightness statistics information of each pixel in described target partial exposure region With the brightness statistics information of each pixel in other regions in addition to described target partial exposure region, according to right in weight matrix The weighted value answered is weighted summation operation, obtains described photometric data；Wherein, in described weight matrix with described target locally The weighted value that in exposure area, each pixel is corresponding is more than the weighted value corresponding with each pixel in other regions described.
16. according to the mobile terminal according to any one of claim 11 to 13, it is characterised in that described parameter calculating module, Including:
Regulation operation receives submodule, for receiving the parameter regulation operation of described mobile phone users；
Offset determines submodule, for receiving, based on described regulation operation, the described regulation operation that submodule receives, determines mesh Mark exposure bias value；
Second calculating sub module, determines, based on described offset, the described target light exposure offset that submodule determines, calculates described The target light exposure parameter that target partial exposure region is corresponding.
17. mobile terminals according to claim 10, it is characterised in that described image synthesis unit, including:
First image zooming-out submodule, in extract described in described second image that target partial exposure region is corresponding first Between image；
Second image zooming-out submodule, for other figures extracted in described first image in addition to described target partial exposure region As the second intermediate image that region is corresponding；
First object image synthon module, for described first intermediate image and the second intermediate image are carried out image synthesis, Generate target image.
18. mobile terminals according to claim 10, it is characterised in that described image synthesis unit, including:
First area image determines submodule, for by described first image and the second image with described target partial exposure district The image that territory is corresponding, presets weighted value synthesis according to first, obtains first area image；
Second area image determines submodule, for removing described target partial exposure district in described first image and the second image The image in other overseas regions, presets weighted value according to the 3rd and synthesizes, and obtains second area image；
Second target image synthon module, for described second area image and second area image are carried out image synthesis, Generate target image.
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