CN105827988A - Light control method and device in mobile terminal shooting - Google Patents
Light control method and device in mobile terminal shooting Download PDFInfo
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- CN105827988A CN105827988A CN201510412503.4A CN201510412503A CN105827988A CN 105827988 A CN105827988 A CN 105827988A CN 201510412503 A CN201510412503 A CN 201510412503A CN 105827988 A CN105827988 A CN 105827988A
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Abstract
The embodiment of the invention provides a light control method and device in mobile terminal shooting. The method comprises a step of determining the color temperature of a scene to be shot, a step of generating a light supplement picture corresponding to the color temperature of the scene to be shot, and a step of carrying out light supplement on the scene to be shot according to the light supplement picture. According to the embodiment of the invention, the shooting effect can be improved under the premise of not increasing hardware cost, and a photo is more in accordance with an actual scene.
Description
Technical field
The present invention relates to technical field of mobile terminals, particularly relate to light control method when a kind of mobile terminal shoots and device.
Background technology
Along with the development of mobile terminal technology, the camera function of mobile terminal is increasingly becoming a requisite part in people's daily life, and people are more and more higher for the requirement of mobile terminal camera function.
But when the front-facing camera using mobile terminal is autodyned, if the dark of environment of finding a view, then the photo taken can be caused dark or noise relatively greatly, have a strong impact on the quality of photograph.Therefore, when taking pictures in the environment of dark, preposition flash lamp can be used to carry out light filling.
But, in actual applications, owing to preposition flash lamp is point source, and beam intensity ratio is relatively big, and user can feel that flash lamp is the most dazzling, not only can damage the eyes of user, and owing to needs increase preposition flash lamp, also can cause the increase of hardware cost.
Summary of the invention
The purpose of the embodiment of the present invention is light control method when providing a kind of mobile terminal to shoot and device, aim to solve the problem that when the front-facing camera of current mobile terminal is taken pictures, carry out light filling by preposition flash lamp, flash lamp the most dazzling and need increase hardware cost problem.
In order to solve the problems referred to above, the invention discloses the light control method during shooting of a kind of mobile terminal, including:
Determine the colour temperature of scene to be captured；
Generate and described scene colour temperature to be captured corresponding light filling picture；
According to described light filling picture, described scene to be captured is carried out light filling.
According to another aspect of the present invention, it is provided that a kind of light control device being applied to mobile terminal, including:
Scene colour temperature determines module, for determining the colour temperature of scene to be captured；
Light filling image generating module, for generating and described scene colour temperature to be captured corresponding light filling picture；And
Supplementary lighting module, carries out light filling according to described light filling picture to described scene to be captured.
Compared with prior art, the embodiment of the present invention includes advantages below:
The embodiment of the present invention is during using mobile terminal to shoot, light filling is carried out by using light filling picture corresponding with the colour temperature of scene to be captured to treat photographed scene, can be while increasing light exposure, retain real light environment, make shooting results more true, natural, to reach optimal shooting effect.Additionally, due to the light control method of the present invention is increased without hardware cost, therefore, it can, on the basis of saving hardware resource, improve the shooting effect of mobile terminal.
Accompanying drawing explanation
Fig. 1 shows the flow chart of steps of the light control method embodiment one when a kind of mobile terminal of the present invention shoots；
Fig. 2 shows the flow chart of steps of the light control method embodiment two when a kind of mobile terminal of the present invention shoots；
Fig. 3 shows the schematic diagram of a kind of laboratory R/G, B/G curve of the present invention；
Fig. 4 shows the flow chart of steps of a kind of mobile terminal image pickup method based on the present invention；And
Fig. 5 shows the structured flowchart of a kind of light control device being applied to mobile terminal of the present invention.
Detailed description of the invention
Understandable for enabling the above-mentioned purpose of the present invention, feature and advantage to become apparent from, the present invention is further detailed explanation with detailed description of the invention below in conjunction with the accompanying drawings.
Embodiment one
With reference to Fig. 1, it is shown that the flow chart of steps of the light control method embodiment one when a kind of mobile terminal of the present invention shoots, specifically may include that
Step 101, determine the colour temperature of scene to be captured；
In embodiments of the present invention, described mobile terminal specifically can include the various mobile terminals such as smart mobile phone, panel computer, notebook computer, and the present invention is not any limitation as the kind of mobile terminal.Use the front-facing camera of mobile terminal to carry out taking pictures user, during recorded video or Video chat, photographed scene can be treated and carry out light filling.For convenience of description, the embodiment of the present invention is to use front-facing camera to carry out as a example by taking pictures, and the embodiment for other application scenarios is cross-referenced.
In a particular application, can directly treat the environment of photographed scene by the preview screen that photographic head obtains to be analyzed, utilize AWB algorithm, obtain the colour temperature of scene to be captured, or, photographic head can be used to absorb the image of scene to be captured, then three primary colours (RGB) data of statistical analysis entire image in advance, obtain colour temperature CCT of scene to be captured further according to the statistics ratio of the most each primary colours R, G, B.In actual applications, can determine the colour temperature of scene to be captured with any one in employing above two mode, it is of course also possible to select it it is determined that the method for scene colour temperature to be captured flexibly according to practical situation, this is not any limitation as by the present invention.
Step 102, generation and described scene colour temperature to be captured corresponding light filling picture；
Wherein, light filling picture is specifically as follows the pure color picture that a colour temperature is same or like with the colour temperature of scene to be captured, and the light sent by this light filling picture illuminates surrounding, i.e. can treat photographed scene and carry out light filling.
Wherein, for defining a physical quantity of light source colour during colour temperature is light optics.I.e. certain black matrix being heated to a temperature, when the color of its light launched is identical with the color of the light that certain light source is launched, the temperature of this black matrix heating is referred to as the colour temperature of this light source, is called for short colour temperature.Its unit represents with " K ".The light that colour temperature is low is the most yellow, such as electric filament lamp, about 2800K, and the light that colour temperature is high is the most blue, such as ultraviolet light, more than 9000K.It is generally believed that reference white light color temperature is the white light that 6500K, CRT are sent is about 5500K, so somewhat changing the mixed proportion of three primary colours, the effect of increase and decrease colour temperature can be simulated, colour temperature photographing, record a video, the field such as publication has important application.
In embodiments of the present invention, if the dark of scene to be captured, then need to treat photographed scene and carry out light filling.Specifically, the light filling picture same or like with the colour temperature of scene to be captured can be used to treat photographed scene and to carry out light filling, on the basis of being increased without hardware cost, the brightness that can improve environment of finding a view will not destroy again the light environment of real scene, so that shooting results is more true, improve shooting effect further.
Step 103, according to described light filling picture, described scene to be captured is carried out light filling.
Specifically, receiving shooting order, as user click on take pictures button time, described light filling picture can be shown at display screen, treat photographed scene and carry out light filling.In actual applications, by display screen, the display mode of described light filling picture can be regulated the brightness of light filling picture, for example, it is possible in display screen, light filling picture is displayed in full screen, half screen shows etc..The present invention is not any limitation as the display mode of light filling picture.
In the moment of shooting photo, the colour temperature of the light filling picture that display screen shows is same or like with the colour temperature of scene to be captured, therefore, it can carry out light filling to photo in the case of not changing real photographed scene.Assume that user is irradiated in environment at pink colour neon light to autodyne, then the light filling picture of display screen also presents pink so that the photo taken, while increasing light exposure, remains real light environment, to reach optimal effect of taking pictures.
To sum up, the embodiment of the present invention is during using mobile terminal to shoot, light filling is carried out by using light filling picture corresponding with the colour temperature of scene to be captured to treat photographed scene, can be while increasing light exposure, retain real light environment, make shooting results more true, natural, to reach optimal shooting effect.Additionally, due to the light control method of the present invention is increased without hardware cost, therefore, it can, on the basis of saving hardware resource, improve the shooting effect of mobile terminal.
Embodiment two
The light control method when mobile terminal of the present embodiment shoots, on the basis of above-described embodiment one, can also include following optional technical scheme further.
With reference to Fig. 2, it is shown that the flow chart of steps of the light control method embodiment two when a kind of mobile terminal of the present invention shoots, specifically may include that
Step 201, obtain the preview screen of scene to be captured；
In a particular application, after user opens front-facing camera, preview interface can be initially entered, such as, can demonstrate the preview screen of the scene to be captured obtained by front-facing camera on the display screen of mobile terminal in real time, user can the shooting angle that adjust mobile terminal etc. by the preview screen watched.Certainly, in actual applications, it is also possible to obtained the preview screen of scene to be captured by post-positioned pick-up head or alternate manner, the present invention is not any limitation as the mode obtaining scene preview picture to be captured.
Step 202, according to described preview screen, determine the colour temperature of scene to be captured；
Specifically, photographic head can be used first to absorb the image of scene to be captured, the then RGB data of statistical analysis entire image, draw colour temperature CCT of scene to be captured according to the weighted statistical ratio data of R, G, B.
In one preferred embodiment of the invention, described according to described preview screen, determine the step of the colour temperature of scene to be captured, specifically can include following sub-step:
Sub-step S11, the three primary colours data message determined in described preview screen；
Sub-step S12, according to described three primary colours data message, determine red green ratio information and blue green ratio information；
Sub-step S13, according to described red green ratio information and blue green ratio information, determine the colour temperature of scene to be captured.
Specifically, can be according to described red green (R/G) ratio information and blue green (B/G) ratio information, with reference to laboratory R/G, B/G curve that current photographic head is corresponding, then draw colour temperature immediate with scene to be captured by the method for the interpolation such as centre.With reference to Fig. 3, it is shown that the schematic diagram of a kind of laboratory R/G, B/G curve of the present invention.As can be seen from Figure 3, by the red green ratio information obtained by photographic head and obtain through statistical analysis and blue green ratio information (real data), rectification through laboratory colour temperature curve, final colour temperature value of calculation can be obtained, i.e. closest with scene to be captured, and best suit the color temperature value of current camera features.In actual applications, laboratory R/G, B/G curve of the photographic head of dissimilar or different designs is different.Therefore, according to laboratory R/G, B/G curve that photographic head is corresponding, the colour temperature drawn by the method for the interpolation such as centre more conforms to the characteristic of this photographic head so that the colour temperature of the scene to be captured determined is more accurate.
Step 203, generation and described scene colour temperature to be captured corresponding light filling picture；
Specifically, according to the colour temperature of the scene to be captured that step 202 determines, can be by adjusting the same or like picture of the colour temperature of three primary colours ratio one colour temperature of generation and scene to be captured as light filling picture.
In another preferred embodiment of the invention, the step of described generation and described scene colour temperature to be captured corresponding light filling picture, specifically can include following sub-step:
Sub-step S21, colour temperature according to described scene to be captured, determine chromaticity coordinates；
Wherein, chromaticity coordinates, it is simply that the coordinate of color.The most conventional color coordinates, transverse axis is x, and the longitudinal axis is y.There is chromaticity coordinates, a point can have been determined on a chromaticity diagram.This Precise Representation glow color.That is: chromaticity coordinates Precise Representation color.
In a particular application, can by the colour temperature of described scene to be captured, obtain chromaticity coordinates (x, y).Such as, when colour temperature CCT of scene to be captured is in the range of 7000K～25000K, can by equation below determine chromaticity coordinates (x, y):
When colour temperature CCT of scene to be captured is in the range of 4000K～7000K, can by equation below determine chromaticity coordinates (x, y):
In actual applications, if colour temperature CCT of scene to be captured is more than 25000K, can be then that 25000K substitution formula (1) calculates according to CCT, if colour temperature CCT of scene to be captured is less than 4000K, then can be that 4000K substitution formula (2) calculates according to CCT.
Those skilled in the art should know, the above-mentioned method a kind of application example as just the present invention determining chromaticity coordinates, in actual applications, alternate manner can be used to determine chromaticity coordinates, or can be adjusted the coefficient in formula according to practical situation, the present invention is not any limitation as the concrete mode determining chromaticity coordinates.
Sub-step S22, according to described chromaticity coordinates, determine the three primary colours ratio of light filling picture；
In embodiments of the present invention, owing to the three primary colours ratio of light filling picture is that the colour temperature calculating according to the scene to be captured in step 202 gets, and the colour temperature of scene to be captured can be laboratory R/G, B/G curve with reference to corresponding photographic head, then draw immediate colour temperature by the method for the interpolation such as centre.Therefore, the three primary colours ratio of the light filling picture determined according to this colour temperature more conforms to real scene and the characteristic of corresponding photographic head so that light filling effect more true nature.Certainly, in actual applications, it is also feasible for directly generating light filling picture according to the ratio of R, G, B of adding up in step 202.
Specifically, determine chromaticity coordinates (x, y) after, can be obtained the value of X, Y, Z by equation below:
Wherein, X, Y, Z are one of color spaces defining of CIE (CommissionInternationaledeL'Eclairage, International Commission on Illumination), and color space has a variety of, including Lab, XYZ, xyLV, HSV etc..The concrete meaning of X, Y, Z refers to the tristimulus values of preferable three primary colours.
According to the ratio of X, Y, Z, can determine, by equation below, the three primary colours ratio that light filling picture is corresponding:
Wherein, the matrix coefficient that matrix A is crossed according to display screen characteristic revision, such as, characteristic that can be colder according to display screen colour temperature or partially warm, this matrix A is carried out adaptive adjustment, so that currently displaying screen display effect more natural reality, it is to avoid color of image distortion.
In a kind of application example of the present invention, matrix A can be following coefficient:
Sub-step S23, according to described three primary colours ratio, generate and described scene colour temperature to be captured corresponding light filling picture.
Specifically, can generate corresponding light filling picture according to the RGB ratio obtained in step S22, such as, if described RGB ratio is R:B:G=1:2:1, then the light filling picture generated can be (127,255,127).In actual applications, so that maximum luminance, can be when generating light filling picture so that RGB data therein gets 255 as far as possible, to reach more preferable light filling effect.
Step 204, according to described light filling picture, described scene to be captured is carried out light filling.
In one preferred embodiment of the invention, described method can also include:
In generation with after described scene colour temperature to be captured corresponding light filling picture, colour temperature and/or brightness to described light filling picture are adjusted.
In a particular application, if user is dissatisfied for colour temperature or the brightness of current light filling picture, the colour temperature of described light filling picture and brightness can be adjusted.Specifically, by display screen, the display mode of described light filling picture can be regulated the brightness of light filling picture, for example, it is possible in display screen, light filling picture is displayed in full screen, half screen shows etc..User-defined light filling picture can also be used to carry out light filling to treat photographed scene, owing to the colour temperature of self-defined light filling picture is different with the colour temperature of scene to be captured, the scene under different colours illumination condition can be simulated, such that it is able to shooting specially good effect photo, to increase motility and the multiformity of shooting.
Application example
With reference to Fig. 4, it is shown that the flow chart of steps of a kind of mobile terminal image pickup method based on the present invention, specifically may include that
Step 401, the open command of reception front-facing camera, open front-facing camera；
Step 402, according to described front-facing camera obtain scene to be captured preview screen；
Step 403, according to described preview screen, determine the colour temperature of scene to be captured；
Step 404, generation light filling picture corresponding with the colour temperature of scene to be captured；
Step 405, when photographing command being detected, perform step 406, otherwise continue detection；
Specifically, can detect whether user sends photographing command, whether such as user clicks on button of taking pictures.If detecting, performing step 406, otherwise performing step 405, continue detection.
Step 406, show described light filling picture at the display screen of described mobile terminal, and generate the photo that scene to be captured is corresponding；
In actual applications, if current photographing command is continuous shooting order, then can generate multiple pictures while display screen shows described light filling picture.
Step 407, display preview interface.
Specifically, after last photo generates, display screen can be switched back to preview interface, to wait the photographing command next time of user.
Device embodiment
With reference to Fig. 5, it is shown that the structured flowchart of a kind of light control device embodiment being applied to mobile terminal of the present invention, specifically may include that
Scene colour temperature determines module 510, for determining the colour temperature of scene to be captured；
Light filling image generating module 520, for generating and described scene colour temperature to be captured corresponding light filling picture；And
Supplementary lighting module 530, carries out light filling according to described light filling picture to described scene to be captured.
In one preferred embodiment of the invention, described scene colour temperature determines module, specifically may include that
Preview screen obtains submodule, for obtaining the preview screen of scene to be captured；And
Scene colour temperature determines submodule, for according to described preview screen, determines the colour temperature of scene to be captured.
In another preferred embodiment of the invention, described scene colour temperature determines submodule, specifically may include that
Three primary colours data determination unit, for determining the three primary colours data message in described preview screen；
Ratio information determines unit, for according to described three primary colours data message, determines red green ratio information and blue green ratio information；And
Scene colour temperature determines unit, for according to described red green ratio information and blue green ratio information, determines the colour temperature of scene to be captured.
In another preferred embodiment of the present invention, described light filling image generating module, specifically may include that
Chromaticity coordinates determines submodule, for the colour temperature according to described scene to be captured, determines chromaticity coordinates；
Three primary colours ratio-dependent submodule, for according to described chromaticity coordinates, determines the three primary colours ratio that light filling picture is corresponding；And
Light filling picture generates submodule, for according to described three primary colours ratio, generates and described scene colour temperature to be captured corresponding light filling picture.
In the still another preferable embodiment of the present invention, described device can also include:
Adjusting module, is used in generation with after described scene colour temperature to be captured corresponding light filling picture, and colour temperature and/or brightness to described light filling picture are adjusted.
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.
Each embodiment in this specification all uses the mode gone forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, and between each embodiment, identical similar part sees mutually.
Those skilled in the art are it should be appreciated that the embodiment of the embodiment of the present invention can be provided as method, device or computer program.Therefore, the form of the embodiment in terms of the embodiment of the present invention can use complete hardware embodiment, complete software implementation or combine software and hardware.And, the embodiment of the present invention can use the form at one or more upper computer programs implemented of computer-usable storage medium (including but not limited to disk memory, CD-ROM, optical memory etc.) wherein including computer usable program code.
The embodiment of the present invention is to describe with reference to method, terminal unit (system) and the flow chart of computer program according to embodiments of the present invention and/or block diagram.It should be understood that can be by the flow process in each flow process in computer program instructions flowchart and/or block diagram and/or square frame and flow chart and/or block diagram and/or the combination of square frame.These computer program instructions can be provided to produce a machine to the processor of general purpose computer, special-purpose computer, Embedded Processor or other programmable data processing terminal equipment so that the instruction performed by the processor of computer or other programmable data processing terminal equipment is produced for realizing the device of function specified in one flow process of flow chart or multiple flow process and/or one square frame of block diagram or multiple square frame.
These computer program instructions may be alternatively stored in and can guide in the computer-readable memory that computer or other programmable data processing terminal equipment work in a specific way, the instruction making to be stored in this computer-readable memory produces the manufacture including command device, and this command device realizes the function specified in one flow process of flow chart or multiple flow process and/or one square frame of block diagram or multiple square frame.
These computer program instructions also can be loaded on computer or other programmable data processing terminal equipment, make to perform sequence of operations step on computer or other programmable terminal equipment to produce computer implemented process, thus the instruction performed on computer or other programmable terminal equipment provides the step of the function specified in one flow process of flow chart or multiple flow process and/or one square frame of block diagram or multiple square frame for realization.
Although having been described for the preferred embodiment of the embodiment of the present invention, but those skilled in the art once know basic creative concept, then these embodiments can be made other change and amendment.So, claims are intended to be construed to include preferred embodiment and fall into all changes and the amendment of range of embodiment of the invention.
Finally, it can further be stated that, in this article, the relational terms of such as first and second or the like is used merely to separate an entity or operation with another entity or operating space, and not necessarily requires or imply the relation or sequentially that there is any this reality between these entities or operation.And, term " includes ", " comprising " or its any other variant are intended to comprising of nonexcludability, so that include that the process of a series of key element, method, article or terminal unit not only include those key elements, but also include other key elements being not expressly set out, or also include the key element intrinsic for this process, method, article or terminal unit.In the case of there is no more restriction, statement " including ... " key element limited, it is not excluded that there is also other identical element in including the process of described key element, method, article or terminal unit.
Light control method when above a kind of mobile terminal provided by the present invention being shot and device, it is described in detail, principle and the embodiment of the present invention are set forth by specific case used herein, and the explanation of above example is only intended to help to understand method and the core concept thereof of the present invention；Simultaneously for one of ordinary skill in the art, according to the thought of the present invention, the most all will change, in sum, this specification content should not be construed as limitation of the present invention.
Claims (10)
1. a light control method during mobile terminal shooting, it is characterised in that described method includes:
Determine the colour temperature of scene to be captured；
Generate and described scene colour temperature to be captured corresponding light filling picture；
According to described light filling picture, described scene to be captured is carried out light filling.
2. the method for claim 1, it is characterised in that the step of the described colour temperature determining scene to be captured, including:
Obtain the preview screen of scene to be captured；
According to described preview screen, determine the colour temperature of scene to be captured.
3. method as claimed in claim 2, it is characterised in that described determine the step of the colour temperature of scene to be captured according to described preview screen, including:
Determine the three primary colours data message in described preview screen；
According to described three primary colours data message, determine red green ratio information and blue green ratio information；
According to described red green ratio information and blue green ratio information, determine the colour temperature of scene to be captured.
4. the method for claim 1, it is characterised in that the step of described generation and described scene colour temperature to be captured corresponding light filling picture, including:
According to the colour temperature of described scene to be captured, determine chromaticity coordinates；
According to described chromaticity coordinates, determine the three primary colours ratio that light filling picture is corresponding；
According to described three primary colours ratio, generate and described scene colour temperature to be captured corresponding light filling picture.
5. the method for claim 1, it is characterised in that described method also includes:
In generation with after described scene colour temperature to be captured corresponding light filling picture, colour temperature and/or brightness to described light filling picture are adjusted.
6. the light control device being applied to mobile terminal, it is characterised in that described device includes:
Scene colour temperature determines module, for determining the colour temperature of scene to be captured；
Light filling image generating module, for generating and described scene colour temperature to be captured corresponding light filling picture；And
Supplementary lighting module, carries out light filling according to described light filling picture to described scene to be captured.
7. device as claimed in claim 6, it is characterised in that described scene colour temperature determines module, including:
Preview screen obtains submodule, for obtaining the preview screen of scene to be captured；And
Scene colour temperature determines submodule, for according to described preview screen, determines the colour temperature of scene to be captured.
8. device as claimed in claim 7, it is characterised in that described scene colour temperature determines submodule, including:
Three primary colours data determination unit, for determining the three primary colours data message in described preview screen；
Ratio information determines unit, for according to described three primary colours data message, determines red green ratio information and blue green ratio information；And
Scene colour temperature determines unit, for according to described red green ratio information and blue green ratio information, determines the colour temperature of scene to be captured.
9. device as claimed in claim 6, it is characterised in that described light filling image generating module, including:
Chromaticity coordinates determines submodule, for the colour temperature according to described scene to be captured, determines chromaticity coordinates；
Three primary colours ratio-dependent submodule, for according to described chromaticity coordinates, determines the three primary colours ratio that light filling picture is corresponding；And
Light filling picture generates submodule, for according to described three primary colours ratio, generates and described scene colour temperature to be captured corresponding light filling picture.
10. device as claimed in claim 6, it is characterised in that described device also includes:
Adjusting module, is used in generation with after described scene colour temperature to be captured corresponding light filling picture, and colour temperature and/or brightness to described light filling picture are adjusted.
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| CN106357975A (en) * | 2016-08-29 | 2017-01-25 | 广东欧珀移动通信有限公司 | Adjusting method, device and camera device for user interface of front camera device |
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| CN106973225A (en) * | 2017-03-17 | 2017-07-21 | 惠州Tcl移动通信有限公司 | Photographic method and system of a kind of mobile terminal based on screen light filling |
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| CN109005360A (en) * | 2018-06-11 | 2018-12-14 | 北京小米移动软件有限公司 | Light compensation method, device and the computer readable storage medium of shooting environmental |
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