CN105100764A - Photographing method and device - Google Patents
Photographing method and device Download PDFInfo
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- CN105100764A CN105100764A CN201510364287.0A CN201510364287A CN105100764A CN 105100764 A CN105100764 A CN 105100764A CN 201510364287 A CN201510364287 A CN 201510364287A CN 105100764 A CN105100764 A CN 105100764A
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Abstract
The invention provides a photographing method and device, and belongs to the technical field of photography. The method comprises the following steps: when a camera is started, obtaining a specified color temperature value of a current light source through a configured color temperature sensor; determining a specified reference scale corresponding to the specified color temperature value according to a pre-established mapping relation of the color temperature value and the reference scale; determining white balance matched with the specified reference scale, wherein the white balance is used for compensating the specified reference scale; and adjusting the color of a photographed object according to the white balance, and generating an image according to the adjusted color of the object. According to the photographing method provided by the invention, the color temperature sensor is configured, and the mapping relation of the color temperature value and the reference scale is pre-established, so that when the camera is started, the matched white balance can be obtained quickly, and when adjusting the color of the photographed object according to the white balance, a color cast phenomenon can be avoided, when the camera is started.
Description
Technical field
The disclosure is directed to camera technique field, specifically about a kind of image pickup method and device.
Background technology
The light color that the light color that reflections off objects goes out sends according to light source is determined, for different light sources, the light color that it sends is different, and the light color that reflections off objects can be caused to go out is also different.So, when using video camera to take object, possibly due to the impact of light source, and cause the object generation colour cast phenomenon of taking out, the object as taken out under the tungsten light of indoor can be partially yellow.
In order to avoid colour cast phenomenon, video camera according to white balance, can adjust the object color photographed, and the image generated after making to adjust color can reflect the true colors of object.Wherein, white balance can represent by the ratio between the gain coefficient of red, green, blue three primary colors, according to the ratio between the gain coefficient of three kinds of colors, when respectively kind of the color of three in the object color photographed being adjusted, can ensure that the object color after adjusting is the true colors of object.
Such as, in the color of the white object of shot by camera, ratio between red, green, blue three kinds of colors is 2:1:1, and in the white balance of video camera, ratio between the gain coefficient of red, green, blue three kinds of colors is 1:2:2, after then adjusting according to the object color of white balance to shooting, can ensure that the ratio between three kinds of colors is 1:1:1, namely white object is still shown as white.
Summary of the invention
In order to solve Problems existing in correlation technique, present disclose provides a kind of image pickup method and device.Described technical scheme is as follows:
According to the first aspect of disclosure embodiment, provide a kind of image pickup method, described method comprises:
When video camera starts, by the color temperature sensor of configuration, obtain the bulletin colour temperature value of current light source;
According to the color temperature value set up in advance and with reference to the mapping relations between ratio, determine that the appointment corresponding with described bulletin colour temperature value is with reference to ratio, described appointment is used for representing under current light source with reference to ratio, the ratio in the color of captured white reference object between three primary colors;
Determine and described white balance of specifying with reference to ratio match, described white balance is used for compensating with reference to ratio described appointment;
According to described white balance, the color of captured object is adjusted, according to the object color synthetic image after adjustment.
In another embodiment, the mapping relations between the color temperature value that described basis is set up in advance and reference ratio, determine that the appointment corresponding with described bulletin colour temperature value is with reference to ratio, comprising:
When not comprising described bulletin colour temperature value in described mapping relations, obtain the first adjacent color temperature value and the second color temperature value in multiple color temperature values that described mapping relations comprise, and described first color temperature value is less than described bulletin colour temperature value, described second color temperature value is greater than described bulletin colour temperature value;
According to described mapping relations, obtain described first color temperature value corresponding first with reference to ratio and described second color temperature value corresponding second with reference to ratio;
According to described first color temperature value, described first with reference to ratio, described bulletin colour temperature value, described second color temperature value and described second reference ratio, carry out interpolation calculation, obtain appointment corresponding to described bulletin colour temperature value with reference to ratio.
In another embodiment, the mapping relations between the color temperature value that described basis is set up in advance and reference ratio, determine that the appointment corresponding with described bulletin colour temperature value is with reference to before ratio, described method also comprises:
According to color temperature value and the corresponding reference ratio of sample light source each in multiple sample light source, set up described mapping relations.
In another embodiment, the described color temperature value according to sample light source each in multiple sample light source and corresponding reference ratio, set up described mapping relations, comprising:
For each sample light source, under described sample light source, by described color temperature sensor, obtain the color temperature value of described sample light source;
White Reference is taken;
Obtain the ratio between three primary colors in the color of captured white reference object, as reference ratio;
Set up the mapping relations between described color temperature value and described reference ratio.
In another embodiment, the described mapping relations set up between described color temperature value and described reference ratio, comprising:
With color temperature value be transverse axis, with reference to ratio for the longitudinal axis, according to color temperature value and the corresponding reference ratio of each sample light source in described multiple sample light source, simulate pre-programmed curve, described pre-programmed curve is for representing the mapping relations between described color temperature value and reference ratio.
According to the second aspect of disclosure embodiment, provide a kind of filming apparatus, described device comprises:
Colour temperature detection module, when starting for local terminal, by the color temperature sensor of configuration, obtains the bulletin colour temperature value of current light source;
Mapping block, mapping relations between the color temperature value set up in advance for basis and reference ratio, determine that the appointment corresponding with described bulletin colour temperature value is with reference to ratio, described appointment is used for representing under current light source with reference to ratio, the ratio in the color of captured white reference object between three primary colors;
Matching module, for determining and described white balance of specifying with reference to ratio match, described white balance is used for compensating with reference to ratio described appointment;
Image-forming module, for according to described white balance, adjusts the color of captured object, according to the object color synthetic image after adjustment.
In another embodiment, described mapping block is not also for when comprising described bulletin colour temperature value in described mapping relations, obtain the first adjacent color temperature value and the second color temperature value in multiple color temperature values that described mapping relations comprise, and described first color temperature value is less than described bulletin colour temperature value, described second color temperature value is greater than described bulletin colour temperature value; According to described mapping relations, obtain described first color temperature value corresponding first with reference to ratio and described second color temperature value corresponding second with reference to ratio; According to described first color temperature value, described first with reference to ratio, described bulletin colour temperature value, described second color temperature value and described second reference ratio, carry out interpolation calculation, obtain appointment corresponding to described bulletin colour temperature value with reference to ratio.
In another embodiment, described device also comprises:
Set up module, for according to the color temperature value of sample light source each in multiple sample light source and the reference ratio of correspondence, set up described mapping relations.
In another embodiment, described module of setting up, for for each sample light source, under described sample light source, by described color temperature sensor, obtains the color temperature value of described sample light source; White Reference is taken; Obtain the ratio between three primary colors in the color of captured white reference object, as reference ratio; Set up the mapping relations between described color temperature value and described reference ratio.
In another embodiment, described set up module also for color temperature value be transverse axis, with reference to ratio for the longitudinal axis, according to color temperature value and the corresponding reference ratio of each sample light source in described multiple sample light source, simulate pre-programmed curve, described pre-programmed curve is for representing the mapping relations between described color temperature value and reference ratio.
According to the third aspect of disclosure embodiment, provide a kind of filming apparatus, described device comprises:
When video camera starts, by the color temperature sensor of configuration, obtain the bulletin colour temperature value of current light source;
According to the color temperature value set up in advance and with reference to the mapping relations between ratio, determine that the appointment corresponding with described bulletin colour temperature value is with reference to ratio, described appointment is used for representing under current light source with reference to ratio, the ratio in the color of captured white reference object between three primary colors;
Determine and described white balance of specifying with reference to ratio match, described white balance is used for compensating with reference to ratio described appointment;
According to described white balance, the color of captured object is adjusted, according to the object color synthetic image after adjustment.
The technical scheme that embodiment of the present disclosure provides can comprise following beneficial effect:
The method and apparatus that the present embodiment provides, by configuration color temperature sensor, and the mapping relations set up in advance between color temperature value and reference ratio, when video camera starts, obtained the color temperature value of current light source by this color temperature sensor, the reference ratio corresponding with this color temperature value can be got according to these mapping relations, thus quick obtaining is to the white balance of coupling, when adjusting according to the color of this white balance to captured object, the colour cast phenomenon occurred when video camera can be avoided to start.
Should be understood that, it is only exemplary that above general description and details hereinafter describe, and can not limit the disclosure.
Accompanying drawing explanation
Accompanying drawing to be herein merged in specification and to form the part of this specification, shows and meets embodiment of the present disclosure, and is used from specification one and explains principle of the present disclosure.
Fig. 1 is the flow chart of a kind of image pickup method according to an exemplary embodiment;
Fig. 2 is the flow chart of a kind of image pickup method according to an exemplary embodiment;
Fig. 3 is the block diagram of a kind of filming apparatus according to an exemplary embodiment;
Fig. 4 is the block diagram of a kind of device for taking according to an exemplary embodiment.
Embodiment
For making object of the present disclosure, technical scheme and advantage clearly understand, below in conjunction with execution mode and accompanying drawing, the disclosure is described in further details.At this, exemplary embodiment of the present disclosure and illustrating for explaining the disclosure, but not as to restriction of the present disclosure.
Before disclosure embodiment is described in detail, first following introduction is carried out to the content that disclosure embodiment relates to:
Three primary colors: the overwhelming majority colour of occurring in nature can be mixed to get by a certain percentage by three kinds of primary colours; Otherwise any one colour all can be broken down into three kinds of primary colours.Ratio between three primary colors is different, and the color be mixed to get is also different.And separate between three primary colors, wherein any one primary colours all can not be produced by other two kinds of mix of basic colors.
Color temperature value: when the light color of light source light color and the black matrix launched radiation is at a certain temperature identical, the temperature of black matrix is called the color temperature value of this light source.In black body radiation, when the temperature of black matrix is different, the light color of radiation is also different, then different color temperature values corresponds to different light sources.Color temperature value represents with kelvin degree (K) usually.
White balance: for describing the index of white accuracy that three primary colors mixing generates, can the ratio between the gain coefficient of three primary colors represent.After video camera shot object, can adjust the three primary colors in the color of captured object according to white balance, with the true colors ensureing that the object color after adjusting is object.
Disclosure embodiment provides a kind of image pickup method and device, is described in detail to the disclosure below in conjunction with accompanying drawing.
Fig. 1 is the flow chart of a kind of image pickup method according to an exemplary embodiment, and as shown in Figure 1, image pickup method is used for, in video camera, comprising the following steps:
In a step 101, when video camera starts, by the color temperature sensor of configuration, obtain the bulletin colour temperature value of current light source.
Wherein, this video camera may be used in the electronic equipments such as mobile phone, PC, computer, and the present embodiment does not limit this.
In a step 102, according to the color temperature value set up in advance and with reference to the mapping relations between ratio, determine that the appointment corresponding with this bulletin colour temperature value is with reference to ratio, this appointment is used for representing under current light source with reference to ratio, the ratio in the color of captured white reference object between three primary colors.
In step 103, determine and the white balance of this appointment with reference to ratio match, this white balance is used for compensating with reference to ratio this appointment.
At step 104, according to this white balance, the color of captured object is adjusted, according to the object color synthetic image after adjustment.
In correlation technique, when video camera starts, have little time to judge exactly current environment, the ratio between three primary colors in the color of captured white reference object cannot be determined, also just cannot get the white balance of mating with current light source, if now this video camera shot object, only can according to the white balance of default setting, the color of captured object is adjusted, if the white balance of this default setting is not mated with current light source, colour cast phenomenon will occur.
And in the present embodiment, camera arrangement color temperature sensor, this color temperature sensor is for obtaining the color temperature value of current light source, this video camera also can set up the mapping relations between color temperature value and reference ratio in advance, then when video camera starts, the color temperature value of current light source is obtained by this color temperature sensor, the reference ratio corresponding with this color temperature value can be got according to these mapping relations, thus get the white balance of coupling, when adjusting according to the color of this white balance to captured object, colour cast phenomenon can be avoided.
The method that the present embodiment provides, by configuration color temperature sensor, and the mapping relations set up in advance between color temperature value and reference ratio, when video camera starts, obtained the color temperature value of current light source by this color temperature sensor, the reference ratio corresponding with this color temperature value can be got according to these mapping relations, thus quick obtaining is to the white balance of coupling, when adjusting according to the color of this white balance to captured object, the colour cast phenomenon occurred when video camera can be avoided to start.
In another embodiment, the mapping relations between the color temperature value that this basis is set up in advance and reference ratio, determine that the appointment corresponding with this bulletin colour temperature value is with reference to ratio, comprising:
When not comprising this bulletin colour temperature value in these mapping relations, obtain the first adjacent color temperature value and the second color temperature value in multiple color temperature values that these mapping relations comprise, and this first color temperature value is less than this bulletin colour temperature value, this second color temperature value is greater than this bulletin colour temperature value;
According to these mapping relations, obtain this first color temperature value corresponding first with reference to ratio and this second color temperature value corresponding second with reference to ratio;
According to this first color temperature value, this first reference ratio, this bulletin colour temperature value, this second color temperature value and this second reference ratio, carry out interpolation calculation, obtain appointment corresponding to this bulletin colour temperature value with reference to ratio.
In another embodiment, the mapping relations between the color temperature value that this basis is set up in advance and reference ratio, determine that the appointment corresponding with this bulletin colour temperature value is with reference to before ratio, the method also comprises:
According to color temperature value and the corresponding reference ratio of sample light source each in multiple sample light source, set up this mapping relations.
In another embodiment, this, according to the color temperature value of sample light source each in multiple sample light source and corresponding reference ratio, is set up this mapping relations, comprising:
For each sample light source, under this sample light source, by this color temperature sensor, obtain the color temperature value of this sample light source;
White Reference is taken;
Obtain the ratio between three primary colors in the color of captured white reference object, as reference ratio;
Set up the mapping relations between this color temperature value and this reference ratio.
In another embodiment, this sets up the mapping relations between this color temperature value and this reference ratio, comprising:
With color temperature value be transverse axis, with reference to ratio for the longitudinal axis, according to the color temperature value of sample light source each in the plurality of sample light source and corresponding reference ratio, simulate pre-programmed curve, this pre-programmed curve is for representing the mapping relations between this color temperature value and reference ratio.
Above-mentioned all alternatives, can adopt and combine arbitrarily formation embodiment of the present disclosure, this is no longer going to repeat them.
Fig. 2 is the flow chart of a kind of image pickup method according to an exemplary embodiment, and as shown in Figure 2, this image pickup method is used for, in video camera, comprising the following steps:
In step 201, video camera, according to the color temperature value of sample light source each in multiple sample light source and corresponding reference ratio, sets up the mapping relations between color temperature value and reference ratio.
Current video camera when starting, cannot quick obtaining to the white balance of mating with current light source, if now shot object, only according to the white balance of default setting, the color of captured object can be adjusted, is easy to generation colour cast phenomenon.
And in the present embodiment, in order to when video camera starts quick obtaining to the white balance of mating with current light source, this camera arrangement color temperature sensor, this color temperature sensor constantly can detect current environment, dynamically export the color temperature value of current light source, and the mapping relations between color temperature value and reference ratio set up in advance by this video camera, this reference ratio is for representing under the light source that this color temperature value is corresponding, ratio in the color of captured white reference object between three primary colors, when then in subsequent process, video camera starts, the color temperature value of current light source can be obtained by this color temperature sensor, and according to these mapping relations, quick obtaining is to the reference ratio corresponding with the color temperature value of current light source, thus get the white balance with this reference ratio match, in case there is colour cast phenomenon during shot object.
When setting up these mapping relations, multiple sample light source can be chosen, respectively under each sample light source, white Reference is taken, the plurality of sample light source can comprise the light source that some special screnes for carrying out standard sources and the outdoor of testing provide, this white reference object can for specialty be for the white card tested or white paper etc., and the present embodiment does not all limit this.
For each sample light source, this video camera under the environment of this sample light source irradiation, by the color temperature sensor of configuration, can obtain the color temperature value of this sample light source, and takes white Reference, obtains the color of captured white reference object.Ratio in the color of white reference object between three primary colors should be 1:1:1, but, due to the radiation of this sample light source, ratio in the color of this white reference object between three primary colors may be no longer 1:1:1, this video camera obtains the ratio in the color of captured white reference object between three primary colors, as reference ratio, and set up the mapping relations between this color temperature value and this reference ratio.
Three primary colors comprise three kinds of colors: the first color, the second color and the 3rd color, and can be this three kinds of colors or other colors of red, green, blue, the particular type of the present embodiment to these three kinds of colors limit.For the ease of representing the ratio between three primary colors, this reference ratio can the ratio in three primary colors between any two colors represent.Such as, this reference ratio comprises the ratio between the first color and the second color, and the ratio between the second color and the 3rd color, then can calculate the ratio between the first color and the 3rd color according to these two ratios.For the first color be red (R), the second color be green (G), the 3rd color for blue (B), this reference ratio can comprise the ratio R/G between redness and green and the ratio G/B between green and blueness.
This video camera performs above-mentioned steps to multiple sample light source, can set up the mapping relations between the color temperature value of each sample light source and corresponding reference ratio, then the mapping relations that this video camera is set up comprise multiple color temperature value and reference ratio corresponding to each color temperature value.
Such as, these mapping relations can be as shown in table 1 below, these mapping relations comprise multiple discrete color temperature value and reference ratio corresponding to each color temperature value, and eachly represent with the ratio G/B between the ratio R/G between red and green and green and blueness with reference to ratio.
Table 1
| Color temperature value | With reference to ratio |
| 2000K | Ratio 1:R/G 1、G/B 1 |
| 3000K | Ratio 2:R/G 2、G/B 2 |
| 4000K | Ratio 3:R/G 3、G/B 3 |
Or, for the ease of getting reference ratio corresponding to each color temperature value according to these mapping relations, this video camera can also after the reference ratio of the color temperature value and correspondence that get multiple sample light source, with color temperature value be transverse axis, with reference to ratio for the longitudinal axis, according to color temperature value and the corresponding reference ratio of sample light source each in the plurality of sample light source, simulate continuous print pre-programmed curve, this pre-programmed curve is for representing the mapping relations between color temperature value and reference ratio.
Namely this video camera with color temperature value be transverse axis, with reference to ratio for the longitudinal axis, set up coordinate system, according to the color temperature value of each sample light source with reference to ratio, generate corresponding sample point in the coordinate system, the multiple sample points generated are carried out curve fitting, obtain pre-programmed curve, make most of sample point be positioned on this pre-programmed curve, this pre-programmed curve can represent the mapping relations between color temperature value and reference ratio.When a given color temperature value, in the coordinate system, with this color temperature value for abscissa, according to this pre-programmed curve, the ordinate corresponding with this color temperature value can be found, be the reference ratio that this color temperature value is corresponding.
When the reference ratio that color temperature value is corresponding represents with two ratios, this video camera can according to the color temperature value of each sample light source and corresponding ratio, simulate two pre-programmed curve, every bar pre-programmed curve is for representing the mapping relations between color temperature value and corresponding ratio.Such as, when this reference ratio represents with the ratio R/G between red and green and the ratio G/B between green and blueness, this video camera is according to the color temperature value of each sample light source and corresponding R/G, simulate a pre-programmed curve, this pre-programmed curve is for representing the mapping relations between color temperature value and corresponding R/G, and according to the color temperature value of each sample light source and the G/B of correspondence, simulate another pre-programmed curve again, this pre-programmed curve is for representing the mapping relations between color temperature value and corresponding G/B.
It should be noted that, this step 201 can be performed in the development process of technical staff by this video camera, then when user buys this video camera, and when starting this video camera, video camera can get the white balance of mating with current light source according to these mapping relations, or, this step 201 can also be carried out in the use procedure of user by this video camera, this video camera can according to the light source under varying environment, these mapping relations are upgraded, then when upper once video camera starts, the white balance of mating with current light source can be got according to the mapping relations after renewal.The present embodiment does not limit the opportunity of setting up to these mapping relations.
In step 202., when video camera starts, by the color temperature sensor of configuration, obtain the bulletin colour temperature value of current light source, according to these mapping relations, determine that the appointment corresponding with this bulletin colour temperature value is with reference to ratio.
When video camera starts, the color temperature value of current light source is obtained by this color temperature sensor, as bulletin colour temperature value, and according to these mapping relations, determine the reference ratio corresponding with this bulletin colour temperature value, as appointment with reference to ratio, then this appointment may be used for representing under current light source with reference to ratio, the ratio in the color of captured white reference object between three primary colors.
When these mapping relations comprise multiple discrete color temperature value and reference ratio corresponding to each color temperature value, this video camera can judge whether comprise this bulletin colour temperature value in these mapping relations, if these mapping relations comprise this bulletin colour temperature value, then this video camera is directly according to these mapping relations, obtains appointment corresponding to this bulletin colour temperature value with reference to ratio.If do not comprise this bulletin colour temperature value in these mapping relations, then this video camera can obtain the first adjacent color temperature value and the second color temperature value in multiple color temperature values that these mapping relations comprise, and this first color temperature value is less than this bulletin colour temperature value, this second color temperature value is greater than this bulletin colour temperature value, and according to these mapping relations, obtain this first color temperature value corresponding first with reference to ratio and this second color temperature value corresponding second with reference to ratio, according to this first color temperature value, this the first reference ratio, this bulletin colour temperature value, this second color temperature value and this second reference ratio, carry out interpolation calculation, obtain appointment corresponding to this bulletin colour temperature value with reference to ratio.
Such as, this video camera can calculate the first difference between this bulletin colour temperature value and this first color temperature value, the second difference between this bulletin colour temperature value and this second color temperature value, according to this first difference, this second difference, this first reference ratio, this second reference ratio, calculate appointment corresponding to this bulletin colour temperature value with reference to ratio.As, to calculate the ratio R/G between red under current light source and green, this bulletin colour temperature value is 3700K, determined first color temperature value is 3000K, R/G in this first reference ratio is R1, this second color temperature value is 4000K, R/G in this second reference ratio is R2, the first difference then between this bulletin colour temperature value and this first color temperature value is 700, and the second difference between this second color temperature value is 300, ratio between first difference and the second difference is 7:3, this video camera can calculate the value of R1*0.3+R2*0.7, as the R/G in the appointment reference ratio that this bulletin colour temperature value 3700K is corresponding.
In addition, when these mapping relations are pre-programmed curve, this video camera is with this bulletin colour temperature value for abscissa, and according to this pre-programmed curve, determine the appointment reference ratio that this bulletin colour temperature value is corresponding, the present embodiment does not repeat them here.
In step 203, video camera is determined and the white balance of this appointment with reference to ratio match, and this white balance is used for compensating with reference to ratio this appointment.
When video camera is according to these mapping relations, when estimating the appointment corresponding with this bulletin colour temperature value with reference to ratio, can determine and the white balance of this appointment with reference to ratio match, this white balance and this appointment are with reference to ratio inversely, can compensate with reference to ratio this appointment, when making to adjust according to the color of this white balance to captured object, this white balance can offset the colour cast phenomenon in object color, ensures that the color after adjustment is the true colors of object.
Such as, this appointment is with reference in ratio, and the ratio between the first color, the second color, the 3rd color is 1:2:1, then this video camera determines to be applicable to the white balance of current light source is 2:1:2.
In step 204, video camera, according to this white balance, adjusts the color of captured object, according to the object color synthetic image after adjustment.
This white balance is for determining the gain coefficient of three primary colors, after determining this white balance, this video camera is when shot object, can according to this white balance, the color of captured object is adjusted, often kind of color is amplified according to the determined gain coefficient of this white balance, according to the object color synthetic image after adjustment, is the image shot.
During practical application, this video camera can the photo of shot object or video, then when the photo of this video camera shot object, according to this white balance, the color of captured object is adjusted, according to the object color synthetic image after adjustment, is the photo of object.And when the video of this video camera shot object, according to this white balance, the color of object in each taken frame picture is adjusted, generate corresponding image according to the object color after adjustment, according to the multiple image generating video generated.
When video camera starts, for determining that the default blank level adjustment algorithm of white balance does not also start, then this video camera can pass through above-mentioned steps, determines the white balance of mating with current light source fast, avoids colour cast phenomenon as much as possible when taking.And after video camera starts a period of time, preset blank level adjustment algorithm to start, now this video camera can adopt this default blank level adjustment algorithm, current environment is judged exactly, redefine the white balance of mating with current light source, take according to this white balance, the present embodiment does not repeat them here.
In actual applications, user usually can start frequently and close video camera, whenever starting video camera, can take in a short period of time, then close video camera to object.Consider this operating habit of user, the present embodiment, when video camera starts, determines the white balance of mating with current light source fast, avoids colour cast phenomenon.And process between the startup starting to default blank level adjustment algorithm from video camera can transition naturally, there will not be obvious colour cast phenomenon, ensure that shooting effect, improve Consumer's Experience.
The method that the present embodiment provides, by configuration color temperature sensor, and the mapping relations set up in advance between color temperature value and reference ratio, when video camera starts, obtained the color temperature value of current light source by this color temperature sensor, the reference ratio corresponding with this color temperature value can be got according to these mapping relations, thus quick obtaining is to the white balance of coupling, when adjusting according to the color of this white balance to captured object, the colour cast phenomenon occurred when video camera can be avoided to start.And process between the startup starting to default blank level adjustment algorithm from video camera can transition naturally, there will not be obvious colour cast phenomenon, ensure that shooting effect.
Fig. 3 is the block diagram of a kind of filming apparatus according to an exemplary embodiment.See Fig. 3, this device comprises colour temperature detection module 301, mapping block 302, matching module 303 and image-forming module 304.
When colour temperature detection module 301 is configured to start for local terminal, by the color temperature sensor of configuration, obtain the bulletin colour temperature value of current light source;
Mapping block 302 is configured to for according to the color temperature value set up in advance and with reference to the mapping relations between ratio, determine that the appointment corresponding with this bulletin colour temperature value is with reference to ratio, this appointment is used for representing under current light source with reference to ratio, the ratio in the color of captured white reference object between three primary colors;
Matching module 303 is configured to for determining and the white balance of this appointment with reference to ratio match, and this white balance is used for compensating with reference to ratio this appointment;
Image-forming module 304 is configured to, for according to this white balance, adjust the color of captured object, according to the object color synthetic image after adjustment.
The device that the present embodiment provides, by configuration color temperature sensor, and the mapping relations set up in advance between color temperature value and reference ratio, when this device starts, obtained the color temperature value of current light source by this color temperature sensor, the reference ratio corresponding with this color temperature value can be got according to these mapping relations, thus quick obtaining is to the white balance of coupling, when adjusting according to the color of this white balance to captured object, the colour cast phenomenon occurred when video camera can be avoided to start.
In another embodiment, this mapping block 302 is also configured to for when not comprising this bulletin colour temperature value in these mapping relations, obtain the first adjacent color temperature value and the second color temperature value in multiple color temperature values that these mapping relations comprise, and this first color temperature value is less than this bulletin colour temperature value, this second color temperature value is greater than this bulletin colour temperature value; According to these mapping relations, obtain this first color temperature value corresponding first with reference to ratio and this second color temperature value corresponding second with reference to ratio; According to this first color temperature value, this first reference ratio, this bulletin colour temperature value, this second color temperature value and this second reference ratio, carry out interpolation calculation, obtain appointment corresponding to this bulletin colour temperature value with reference to ratio.
In another embodiment, this device also comprises:
Set up module to be configured to, for according to the color temperature value of sample light source each in multiple sample light source and the reference ratio of correspondence, set up this mapping relations.
In another embodiment, this is set up module and is configured to, for for each sample light source, under this sample light source, by this color temperature sensor, obtain the color temperature value of this sample light source; White Reference is taken; Obtain the ratio between three primary colors in the color of captured white reference object, as reference ratio; Set up the mapping relations between this color temperature value and this reference ratio.
In another embodiment, this set up module be also configured to for color temperature value be transverse axis, with reference to ratio for the longitudinal axis, according to color temperature value and the corresponding reference ratio of sample light source each in the plurality of sample light source, simulate pre-programmed curve, this pre-programmed curve is for representing the mapping relations between this color temperature value and reference ratio.
Above-mentioned all alternatives, can adopt and combine arbitrarily formation embodiment of the present disclosure, this is no longer going to repeat them.
About the device in above-described embodiment, wherein the concrete mode of modules executable operations has been described in detail in about the embodiment of the method, will not elaborate explanation herein.
It should be noted that: the filming apparatus that above-described embodiment provides is when shot object, only be illustrated with the division of above-mentioned each functional module, in practical application, can distribute as required and by above-mentioned functions and be completed by different functional modules, internal structure by video camera is divided into different functional modules, to complete all or part of function described above.In addition, the filming apparatus that above-described embodiment provides and image pickup method embodiment belong to same design, and its specific implementation process refers to embodiment of the method, repeats no more here.
Fig. 4 is the block diagram of a kind of device 400 for taking according to an exemplary embodiment.Such as, device 400 can be mobile phone, computer, digital broadcast terminal, messaging devices, game console, flat-panel devices, Medical Devices, body-building equipment, personal digital assistant etc.
With reference to Fig. 4, device 400 can comprise following one or more assembly: processing components 402, memory 404, power supply module 406, multimedia groupware 408, audio-frequency assembly 410, the interface 412 of I/O (I/O), sensor cluster 414, and communications component 416.
The integrated operation of the usual control device 400 of processing components 402, such as with display, call, data communication, camera operation and record operate the operation be associated.Processing components 402 can comprise one or more processor 420 to perform instruction, to complete all or part of step of above-mentioned method.In addition, processing components 402 can comprise one or more module, and what be convenient between processing components 402 and other assemblies is mutual.Such as, processing components 402 can comprise multi-media module, mutual with what facilitate between multimedia groupware 408 and processing components 402.
Memory 404 is configured to store various types of data to be supported in the operation of device 400.The example of these data comprises for any application program of operation on device 400 or the instruction of method, contact data, telephone book data, message, picture, video etc.Memory 404 can be realized by the volatibility of any type or non-volatile memory device or their combination, as static RAM (SRAM), Electrically Erasable Read Only Memory (EEPROM), Erasable Programmable Read Only Memory EPROM (EPROM), programmable read only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, disk or CD.
The various assemblies that power supply module 406 is device 400 provide electric power.Power supply module 406 can comprise power-supply management system, one or more power supply, and other and the assembly generating, manage and distribute electric power for device 400 and be associated.
Multimedia groupware 408 is included in the screen providing an output interface between described device 400 and user.In certain embodiments, screen can comprise liquid crystal display (LCD) and touch panel (TP).If screen comprises touch panel, screen may be implemented as touch-screen, to receive the input signal from user.Touch panel comprises one or more touch sensor with the gesture on sensing touch, slip and touch panel.Described touch sensor can the border of not only sensing touch or sliding action, but also detects the duration relevant to described touch or slide and pressure.In certain embodiments, multimedia groupware 408 comprises a front-facing camera and/or post-positioned pick-up head.When device 400 is in operator scheme, during as screening-mode or video mode, front-facing camera and/or post-positioned pick-up head can receive outside multi-medium data.Each front-facing camera and post-positioned pick-up head can be fixing optical lens systems or have focal length and optical zoom ability.
Audio-frequency assembly 410 is configured to export and/or input audio signal.Such as, audio-frequency assembly 410 comprises a microphone (MIC), and when device 400 is in operator scheme, during as call model, logging mode and speech recognition mode, microphone is configured to receive external audio signal.The audio signal received can be stored in memory 404 further or be sent via communications component 416.In certain embodiments, audio-frequency assembly 410 also comprises a loud speaker, for output audio signal.
I/O interface 412 is for providing interface between processing components 402 and peripheral interface module, and above-mentioned peripheral interface module can be keyboard, some striking wheel, button etc.These buttons can include but not limited to: home button, volume button, start button and locking press button.
Sensor cluster 414 comprises one or more transducer, for providing the state estimation of various aspects for device 400.Such as, sensor cluster 414 can detect the opening/closing state of device 400, the relative positioning of assembly, such as described assembly is display and the keypad of device 400, the position of all right checkout gear 400 of sensor cluster 414 or device 400 1 assemblies changes, the presence or absence that user contacts with device 400, the variations in temperature of device 400 orientation or acceleration/deceleration and device 400.Sensor cluster 414 can comprise proximity transducer, be configured to without any physical contact time detect near the existence of object.Sensor cluster 414 can also comprise optical sensor, as CMOS or ccd image sensor, for using in imaging applications.In certain embodiments, this sensor cluster 414 can also comprise acceleration transducer, gyro sensor, Magnetic Sensor, pressure sensor or temperature sensor.
Communications component 416 is configured to the communication being convenient to wired or wireless mode between device 400 and other equipment.Device 400 can access the wireless network based on communication standard, as WiFi, 2G or 3G, or their combination.In one exemplary embodiment, communications component 416 receives from the broadcast singal of external broadcasting management system or broadcast related information via broadcast channel.In one exemplary embodiment, described communications component 416 also comprises near-field communication (NFC) module, to promote junction service.Such as, can based on radio-frequency (RF) identification (RFID) technology in NFC module, Infrared Data Association (IrDA) technology, ultra broadband (UWB) technology, bluetooth (BT) technology and other technologies realize.
In the exemplary embodiment, device 400 can be realized, for performing above-mentioned image pickup method by one or more application specific integrated circuit (ASIC), digital signal processor (DSP), digital signal processing appts (DSPD), programmable logic device (PLD), field programmable gate array (FPGA), controller, microcontroller, microprocessor or other electronic components.
In the exemplary embodiment, additionally provide a kind of non-transitory computer-readable recording medium comprising instruction, such as, comprise the memory 404 of instruction, above-mentioned instruction can perform said method by the processor 420 of device 400.Such as, this non-transitory computer-readable recording medium can be ROM, random access memory (RAM), CD-ROM, tape, floppy disk and optical data storage devices etc.
A kind of non-transitory computer-readable recording medium, when the instruction in this storage medium is performed by the processor of video camera, make video camera can perform a kind of image pickup method, the method comprises:
When video camera starts, by the color temperature sensor of configuration, obtain the bulletin colour temperature value of current light source;
According to the color temperature value set up in advance and with reference to the mapping relations between ratio, determine that the appointment corresponding with described bulletin colour temperature value is with reference to ratio, described appointment is used for representing under current light source with reference to ratio, the ratio in the color of captured white reference object between three primary colors;
Determine and described white balance of specifying with reference to ratio match, described white balance is used for compensating with reference to ratio described appointment;
According to described white balance, the color of captured object is adjusted, according to the object color synthetic image after adjustment.
In another embodiment, the mapping relations between the color temperature value that described basis is set up in advance and reference ratio, determine that the appointment corresponding with described bulletin colour temperature value is with reference to ratio, comprising:
When not comprising described bulletin colour temperature value in described mapping relations, obtain the first adjacent color temperature value and the second color temperature value in multiple color temperature values that described mapping relations comprise, and described first color temperature value is less than described bulletin colour temperature value, described second color temperature value is greater than described bulletin colour temperature value;
According to described mapping relations, obtain described first color temperature value corresponding first with reference to ratio and described second color temperature value corresponding second with reference to ratio;
According to described first color temperature value, described first with reference to ratio, described bulletin colour temperature value, described second color temperature value and described second reference ratio, carry out interpolation calculation, obtain appointment corresponding to described bulletin colour temperature value with reference to ratio.
In another embodiment, the mapping relations between the color temperature value that described basis is set up in advance and reference ratio, determine that the appointment corresponding with described bulletin colour temperature value is with reference to before ratio, described method also comprises:
According to color temperature value and the corresponding reference ratio of sample light source each in multiple sample light source, set up described mapping relations.
In another embodiment, the described color temperature value according to sample light source each in multiple sample light source and corresponding reference ratio, set up described mapping relations, comprising:
For each sample light source, under described sample light source, by described color temperature sensor, obtain the color temperature value of described sample light source;
White Reference is taken;
Obtain the ratio between three primary colors in the color of captured white reference object, as reference ratio;
Set up the mapping relations between described color temperature value and described reference ratio.
In another embodiment, the described mapping relations set up between described color temperature value and described reference ratio, comprising:
With color temperature value be transverse axis, with reference to ratio for the longitudinal axis, according to color temperature value and the corresponding reference ratio of each sample light source in described multiple sample light source, simulate pre-programmed curve, described pre-programmed curve is for representing the mapping relations between described color temperature value and reference ratio.
Those skilled in the art, at consideration specification and after putting into practice invention disclosed herein, will easily expect other embodiment of the present disclosure.The application is intended to contain any modification of the present disclosure, purposes or adaptations, and these modification, purposes or adaptations are followed general principle of the present disclosure and comprised the undocumented common practise in the art of the disclosure or conventional techniques means.Specification and embodiment are only regarded as exemplary, and true scope of the present disclosure and spirit are pointed out by claim below.
Should be understood that, the disclosure is not limited to precision architecture described above and illustrated in the accompanying drawings, and can carry out various amendment and change not departing from its scope.The scope of the present disclosure is only limited by appended claim.
Claims (11)
1. an image pickup method, is characterized in that, described method comprises:
When video camera starts, by the color temperature sensor of configuration, obtain the bulletin colour temperature value of current light source;
According to the color temperature value set up in advance and with reference to the mapping relations between ratio, determine that the appointment corresponding with described bulletin colour temperature value is with reference to ratio, described appointment is used for representing under current light source with reference to ratio, the ratio in the color of captured white reference object between three primary colors;
Determine and described white balance of specifying with reference to ratio match, described white balance is used for compensating with reference to ratio described appointment;
According to described white balance, the color of captured object is adjusted, according to the object color synthetic image after adjustment.
2. method according to claim 1, is characterized in that, the mapping relations between the color temperature value that described basis is set up in advance and reference ratio, determines that the appointment corresponding with described bulletin colour temperature value is with reference to ratio, comprising:
When not comprising described bulletin colour temperature value in described mapping relations, obtain the first adjacent color temperature value and the second color temperature value in multiple color temperature values that described mapping relations comprise, and described first color temperature value is less than described bulletin colour temperature value, described second color temperature value is greater than described bulletin colour temperature value;
According to described mapping relations, obtain described first color temperature value corresponding first with reference to ratio and described second color temperature value corresponding second with reference to ratio;
According to described first color temperature value, described first with reference to ratio, described bulletin colour temperature value, described second color temperature value and described second reference ratio, carry out interpolation calculation, obtain appointment corresponding to described bulletin colour temperature value with reference to ratio.
3. method according to claim 1, is characterized in that, the mapping relations between the color temperature value that described basis is set up in advance and reference ratio, and determine that the appointment corresponding with described bulletin colour temperature value is with reference to before ratio, described method also comprises:
According to color temperature value and the corresponding reference ratio of sample light source each in multiple sample light source, set up described mapping relations.
4. method according to claim 3, is characterized in that, the described color temperature value according to sample light source each in multiple sample light source and corresponding reference ratio, sets up described mapping relations, comprising:
For each sample light source, under described sample light source, by described color temperature sensor, obtain the color temperature value of described sample light source;
White Reference is taken;
Obtain the ratio between three primary colors in the color of captured white reference object, as reference ratio;
Set up the mapping relations between described color temperature value and described reference ratio.
5. method according to claim 4, is characterized in that, the described mapping relations set up between described color temperature value and described reference ratio, comprising:
With color temperature value be transverse axis, with reference to ratio for the longitudinal axis, according to color temperature value and the corresponding reference ratio of each sample light source in described multiple sample light source, simulate pre-programmed curve, described pre-programmed curve is for representing the mapping relations between described color temperature value and reference ratio.
6. a filming apparatus, is characterized in that, described device comprises:
Colour temperature detection module, when starting for local terminal, by the color temperature sensor of configuration, obtains the bulletin colour temperature value of current light source;
Mapping block, mapping relations between the color temperature value set up in advance for basis and reference ratio, determine that the appointment corresponding with described bulletin colour temperature value is with reference to ratio, described appointment is used for representing under current light source with reference to ratio, the ratio in the color of captured white reference object between three primary colors;
Matching module, for determining and described white balance of specifying with reference to ratio match, described white balance is used for compensating with reference to ratio described appointment;
Image-forming module, for according to described white balance, adjusts the color of captured object, according to the object color synthetic image after adjustment.
7. device according to claim 6, it is characterized in that, described mapping block is not also for when comprising described bulletin colour temperature value in described mapping relations, obtain the first adjacent color temperature value and the second color temperature value in multiple color temperature values that described mapping relations comprise, and described first color temperature value is less than described bulletin colour temperature value, described second color temperature value is greater than described bulletin colour temperature value; According to described mapping relations, obtain described first color temperature value corresponding first with reference to ratio and described second color temperature value corresponding second with reference to ratio; According to described first color temperature value, described first with reference to ratio, described bulletin colour temperature value, described second color temperature value and described second reference ratio, carry out interpolation calculation, obtain appointment corresponding to described bulletin colour temperature value with reference to ratio.
8. device according to claim 6, is characterized in that, described device also comprises:
Set up module, for according to the color temperature value of sample light source each in multiple sample light source and the reference ratio of correspondence, set up described mapping relations.
9. device according to claim 8, is characterized in that, described module of setting up, for for each sample light source, under described sample light source, by described color temperature sensor, obtains the color temperature value of described sample light source; White Reference is taken; Obtain the ratio between three primary colors in the color of captured white reference object, as reference ratio; Set up the mapping relations between described color temperature value and described reference ratio.
10. device according to claim 9, it is characterized in that, described set up module also for color temperature value be transverse axis, with reference to ratio for the longitudinal axis, according to color temperature value and the corresponding reference ratio of each sample light source in described multiple sample light source, simulate pre-programmed curve, described pre-programmed curve is for representing the mapping relations between described color temperature value and reference ratio.
11. 1 kinds of filming apparatus, is characterized in that, comprising:
Processor;
For the memory of storage of processor executable instruction;
Wherein, described processor is configured to:
When video camera starts, by the color temperature sensor of configuration, obtain the bulletin colour temperature value of current light source;
According to the color temperature value set up in advance and with reference to the mapping relations between ratio, determine that the appointment corresponding with described bulletin colour temperature value is with reference to ratio, described appointment is used for representing under current light source with reference to ratio, the ratio in the color of captured white reference object between three primary colors;
Determine and described white balance of specifying with reference to ratio match, described white balance is used for compensating with reference to ratio described appointment;
According to described white balance, the color of captured object is adjusted, according to the object color synthetic image after adjustment.
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