CN104618645A - Method and device for shooting through two cameras - Google Patents
Method and device for shooting through two cameras Download PDFInfo
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Abstract
The embodiment of the invention discloses method and device for shooting through two cameras. The method comprises the steps of receiving a first preview image acquired by a first camera and a second preview image acquired by a second camera; determining whether the first preview image and the second preview image include light source areas; if so, controlling the second camera to perform spot metering for the light source areas; adjusting the brightness of the second preview image according to the spot metering result to obtain a second preview corrected image; calculating the color gain value of the light source areas of the second preview corrected image, wherein the color gain value includes a red gain value, a green gain value and a blue gain value; transmitting the color gain value to the first camera; controlling the first camera to correct the first preview image according to the color gain value so as to obtain a target image. With the adoption of the method and device, the shooting effect can be improved.
Description
Technical field
The present invention relates to communication technical field, be specifically related to a kind of use dual camera to take method and device.
Background technology
Along with development and the progress of electronics and mechanics of communication, filming apparatus is applied more and more extensive in daily life, and increasing smart machine is all configured with filming apparatus, such as: the smart machines such as mobile phone, panel computer, notebook computer are all configured with filming apparatus.When using filming apparatus to take pictures, if take pictures facing to light source nearby, because light-source brightness is higher, be easy to the phenomenon occurring local overexposure, the object near light source is caused to be affected by the high light of light source, occur that white balance is forbidden, make the object near light source easily present the color of light source, cannot reduce its true picture.
Summary of the invention
The embodiment of the present invention provide a kind of use dual camera to take method and device, the shooting effect of filming apparatus can be improved.
The embodiment of the present invention provides a kind of method using dual camera to take, and comprising:
Receive the first preview image of the first camera acquisition and the second preview image of second camera acquisition;
Judge whether described first preview image and described second preview image include source region;
If so, control described second camera and a light-metering is carried out to described source region, and according to a brightness of described second preview image of photometry result adjustment, obtain the second preview correcting image;
Calculate the colour gain values of described second preview correcting image source region, described colour gain values comprises red gain value, green gain value and blue gain value;
Send described colour gain values to described first camera, control described first camera and correct described first preview image according to described colour gain values, obtain target image.
Accordingly, the embodiment of the present invention also provides a kind of device using dual camera to take, and comprising:
Receiving element, the second preview image that the first preview image and second camera for receiving the first camera acquisition obtain;
Judging unit, for judging whether described first preview image and described second preview image include source region;
Adjustment unit, for when described judging unit judged result is for being, controls described second camera and carrying out a light-metering to described source region, and according to a brightness of described second preview image of photometry result adjustment, obtains the second preview correcting image;
Computing unit, for calculating the colour gain values of described second preview correcting image source region, described colour gain values comprises red gain value, green gain value and blue gain value;
Correcting unit, for sending described colour gain values to described first camera, controlling described first camera and correcting described first preview image according to described colour gain values, obtaining target image.
In the embodiment of the present invention, the first preview image of the first camera acquisition and the second preview image of second camera acquisition can be received; Judge whether the first preview image and the second preview image include source region; If so, control second camera and a light-metering is carried out to source region, and adjust the brightness of the second preview image according to a photometry result, obtain the second preview correcting image; Calculate the colour gain values of the second preview correcting image source region; Colour gain values is sent to the first camera, control the first camera and correct the first preview image according to colour gain values, obtain target image.Adopt the method for dual camera shooting, the embodiment of the present invention can improve the shooting effect of filming apparatus.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, be briefly described to the accompanying drawing used required in embodiment below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the flow chart of a kind of method using dual camera to take disclosed in the embodiment of the present invention;
Fig. 2 is the disclosed another kind of flow chart using the method for dual camera shooting of the embodiment of the present invention;
Fig. 3 is the structural representation of a kind of device using dual camera to take disclosed in the embodiment of the present invention;
Fig. 4 is the disclosed another kind of structural representation using the device of dual camera shooting of the embodiment of the present invention;
Fig. 5 is the disclosed another kind of structural representation using the device of dual camera shooting of the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the present invention provide a kind of use dual camera to take method and device, the shooting effect of filming apparatus can be improved.Below be described in detail respectively.
In the embodiment of the present invention, filming apparatus can be the device that camera or video camera etc. can carry out taking, in addition, in this transmission embodiment, filming apparatus can also be the filming apparatus that any smart machine configures, wherein, smart machine includes but not limited to: mobile phone, panel computer, electronic reader, remote controller, personal computer (Personal Computer, PC), notebook computer, mobile unit, Web TV, wearable device etc. are configured with the smart machine of filming apparatus.
Refer to Fig. 1, Fig. 1 is the flow chart of a kind of method using dual camera to take disclosed in the embodiment of the present invention.As shown in Figure 1, the method for the use dual camera shooting described in the present embodiment, comprises step:
S101, receives the first preview image of the first camera acquisition and the second preview image of second camera acquisition.
In the embodiment of the present invention, can be that image processor receives the first preview image of the first camera acquisition and the second preview image of second camera acquisition, image processor can receive the first preview image of the first camera acquisition and the second preview image of second camera acquisition simultaneously.For example, first camera and second camera be the same picture of preview separately, first camera obtains the first preview image, second camera obtains the second preview image simultaneously, and image processor receives the first preview image of the first camera acquisition and the second preview image of second camera acquisition.
S102, judges whether the first preview image and the second preview image include source region.
In the embodiment of the present invention, first preview image and the second preview image are respectively captured by the first camera and second camera, the difference of the locus residing for two cameras, first preview image and the second preview image have fine distinction, light source may be photographed by first camera, and second camera does not photograph light source, the source region cannot determining that needs are measured can be caused like this.Judging whether the first preview image and the second preview image include source region can by judging that in the first preview image, whether brightness value is identical more than the shape in the region of the first predetermined luminance value with brightness value in the second preview image more than the shape in the region of the first predetermined luminance value, if identical, then determine that the first preview image and the second preview image include source region, if different, then determine that the first preview image and the second preview image do not include source region.
S103, if so, controls second camera and carries out a light-metering to source region, and adjust the brightness of the second preview image according to a photometry result, obtain the second preview correcting image.
In the embodiment of the present invention, when the first preview image and the second preview image include source region, control second camera and a light-metering is carried out to source region, and adjust the brightness of the second preview image according to a photometry result, obtain the second preview correcting image.For example, image processor controls second camera and carries out a light-metering to source region, obtain a photometry result, if some photometry result display current light source region enters the reflectance lightness value of second camera more than the second predetermined luminance value, then turn down the brightness of the second preview image, obtain the second preview correcting image; If some photometry result display current light source region enters the reflectance lightness value of second camera lower than the second predetermined luminance value, then heighten the brightness of the second preview image, obtain the second preview correcting image.
S104, calculate the colour gain values of the second preview correcting image source region, colour gain values comprises red gain value, green gain value and blue gain value.
In the embodiment of the present invention, image processor calculates the colour gain values of the second preview correcting image source region.For example, image processor calculates the red gain value of the second preview correcting image source region, green gain value and blue gain value respectively.
S105, sends the first camera to by colour gain values, control the first camera and correct the first preview image according to colour gain values, obtain target image.
In the embodiment of the present invention, image processor sends colour gain values to first camera, controls the first camera and corrects the first preview image according to colour gain values, obtain target image.For example, after image processor sends red gain value, green gain value and blue gain value to first camera, control the first camera and red gain value, green gain value and blue gain value are assigned to the first preview image, obtain target image.The Accurate color yield value of source region is obtained by the light-metering of second camera point, image processor sends Accurate color yield value to first camera, thus the first preview picture that the first camera gets can be corrected accurately, obtain white balance target image accurately, improve the shooting effect of filming apparatus.
In the embodiment of the present invention, receive the first preview image of the first camera acquisition and the second preview image of second camera acquisition; Judge whether the first preview image and the second preview image include source region; If so, control second camera and a light-metering is carried out to source region, and adjust the brightness of the second preview image according to a photometry result, obtain the second preview correcting image; Calculate the colour gain values of the second preview correcting image source region, colour gain values comprises red gain value, green gain value and blue gain value; Colour gain values is sent to the first camera, control the first camera and correct the first preview image according to colour gain values, obtain target image.Adopt the method for dual camera shooting, the embodiment of the present invention can improve the shooting effect of filming apparatus.
Refer to Fig. 2, Fig. 2 is the disclosed another kind of flow chart using the method for dual camera shooting of the embodiment of the present invention.As shown in Figure 2, the method for the use dual camera shooting described in the present embodiment, comprises step:
S201, receives the first preview image of the first camera acquisition and the second preview image of second camera acquisition.
S202, judges that in the first preview image, whether brightness value is identical more than the shape in the region of the first predetermined luminance value with brightness value in the second preview image more than the shape in the region of the first predetermined luminance value.
In the embodiment of the present invention, image processor judges that in the first preview image, whether brightness value is identical more than the shape in the region of the first predetermined luminance value with brightness value in the second preview image more than the shape in the region of the first predetermined luminance value.For example, image processor is added up brightness value in the first preview image and more than the region of the first predetermined luminance value, is judged that in the first preview image, whether brightness value is identical more than the shape in the region of the first predetermined luminance value with brightness value in the second preview image more than the shape in the region of the first predetermined luminance value more than brightness value in the region of the first predetermined luminance value and the second preview image.
In the execution mode that some are feasible, step S202 can comprise:
First preview image is divided into 256 identical statistics block of size with the second preview image according to identical partitioning scheme;
Calculate the brightness value of each statistics block in the brightness value of each statistics block in the first preview image and the second preview image respectively;
Add up brightness value in the first preview image to be greater than brightness value in the first statistics block of the first predetermined luminance value and the second preview image to be greater than the second statistics of the first predetermined luminance value fast;
Judge that whether the distribution shape of the first statistics block is identical with the distribution shape of the second statistics block;
If identical, then determine that in the first preview image, brightness value is identical more than the shape in the region of the first predetermined luminance value with brightness value in the second preview image more than the shape in the region of the first predetermined luminance value.
In the embodiment of the present invention, first preview image and the second preview image are divided into 256 identical statistics block of size according to identical partitioning scheme by image processor by the length of the first preview image and the second preview image and widely can be divided into 16 equal portions respectively, obtains 256 rectangle statistics block that size is identical respectively; Calculate the brightness value of each statistics block in the brightness value of each statistics block in the first preview image and the second preview image respectively; Add up brightness value in the first preview image to be greater than brightness value in the first statistics block of the first predetermined luminance value and the second preview image and to be greater than the second statistics block of the first predetermined luminance value, here brightness value unit is lux (lx), predetermined luminance value can be set to 100lx according to shooting environmental, 150lx, 200lx, 250lx, 300lx or other predetermined luminance values; If the first predetermined luminance value is 250lx, then statistics block brightness value in the first preview image being greater than 250lx is designated as the first statistics block, and the statistics block that brightness value in the second preview image is greater than 250lx is designated as the second statistics block; Judging the distribution shape of the first statistics block, whether whether identical with the distribution shape of the second statistics block can to judge that the first statistics block is distributed in the position that position in the first preview image and the second statistics block be distributed in the second preview image identical; If identical, then determine that in the first preview image, brightness value is identical more than the shape in the region of the first predetermined luminance value with brightness value in the second preview image more than the shape in the region of the first predetermined luminance value, then determine that the first preview image and the second preview image include source region; If different, then determine that in the first preview image, brightness value is different more than the shape in the region of the first predetermined luminance value from brightness value in the second preview image more than the shape in the region of the first predetermined luminance value, then determine that the first preview image and the second preview image do not include source region.
S203, if identical, then determine that the first preview image and the second preview image include source region, source region be in the first preview image brightness value more than brightness value in the region of the first predetermined luminance value or the second preview image more than the region of the first predetermined luminance value.
In the embodiment of the present invention, source region is determined according to brightness value in the first preview image is identical more than the region of the first predetermined luminance value with brightness value in the second preview image more than the region of the first predetermined luminance value.Determining that the first preview image and the second preview image include identical source region is to ensure that second camera can carry out a light-metering to the source region in the first preview image of the first camera shooting.
S204, controls second camera and carries out a light-metering to source region, and adjust the brightness of the second preview image according to a photometry result, obtain the second preview correcting image.
In the execution mode that some are feasible, step S204 can comprise:
Measurement light source region enters the reflectance lightness value of second camera;
Judge that whether reflectance lightness value is more than the second predetermined luminance value;
If exceed, then turn down the brightness of the second preview image according to the second predetermined luminance value, obtain the second preview correcting image.
In the embodiment of the present invention, image processor controls second camera and carries out to source region a light-metering can enter second camera reflectance lightness value by measurement light source region, obtain a photometry result, reflectance lightness value can reflect for source region the average brightness value entering the light of second camera.If some photometry result be reflectance lightness value more than the second predetermined luminance value, then turn down the brightness of the second preview image according to the second predetermined luminance value, obtain the second preview correcting image; If some photometry result is that reflectance lightness value is no more than the second predetermined luminance value, then heightens the brightness of the second preview image according to the second predetermined luminance value, obtain the second preview correcting image.It is to obtain normal second preview image of brightness value that control second camera carries out a light-metering to source region, i.e. the second preview correcting image, after only having brightness value normal, the colour gain values ability Measurement accuracy of source region, the white balance in the first preview image could by accurate alignment.
S205, calculate the colour gain values of the second preview correcting image source region, colour gain values comprises red gain value, green gain value and blue gain value.
In the execution mode that some are feasible, step S205 can comprise:
Colour gain values according to following formulae discovery second preview correcting image source region:
R-gain=Ymax/Ravg, R-gain are red gain value, and Ymax is the brightness value of the statistics block that in the second preview correcting image source region, brightness value is maximum, and Ravg is red channel average;
G-gain=Ymax/Gavg, G-gain are green gain value, and Ymax is the brightness value of the statistics block that in the second preview correcting image source region, brightness value is maximum, and Gavg is green channel average;
B-gain=Ymax/Bavg, B-gain are blue gain value, and Ymax is the brightness value of the statistics block that in the second preview correcting image source region, brightness value is maximum, and Bavg is blue channel average.
In the embodiment of the present invention, image processor calculates the red gain value of the second preview correcting image source region, green gain value and blue gain value respectively.In second preview correcting image source region, the brightness value of the statistics block that brightness value is maximum is the brightness value of statistics block after step S204 calibration that in the second preview image source region, brightness value is maximum.Channel average can draw according to white balance gray world statistic law.
S206, sends the first camera to by colour gain values, control the first camera and correct the first preview image according to colour gain values, obtain target image.
In the embodiment of the present invention, after image processor obtains the colour gain values of red-green-blue, colour gain values is sent to the first camera, control the first camera and correct the first preview image according to colour gain values, obtain target image.The algorithm provided in step S205 supposes based on the one of gray world, namely the average reflection of piece image can offset aberration, the average of its RGB component can be tending towards equal, for example, if the average of the RGB component of the first preview image is different, suppose that the RGB component ratio of the first preview image is 1:1:2, by the color gain that image processor sends, suppose that in the color gain sent, RGB component ratio is 2:2:1, this just makes the average of the RGB component of the first preview image be tending towards equal, obtain white balance target image accurately, improve the shooting effect of filming apparatus.
In the embodiment of the present invention, receive the first preview image of the first camera acquisition and the second preview image of second camera acquisition; Judge that in the first preview image, whether brightness value is identical more than the shape in the region of the first predetermined luminance value with brightness value in the second preview image more than the shape in the region of the first predetermined luminance value; If identical, then determine that the first preview image and the second preview image include source region, source region be in the first preview image brightness value more than brightness value in the region of the first predetermined luminance value or the second preview image more than the region of the first predetermined luminance value; Control second camera and a light-metering is carried out to source region, and adjust the brightness of the second preview image according to a photometry result, obtain the second preview correcting image; Calculate the colour gain values of the second preview correcting image source region, colour gain values comprises red gain value, green gain value and blue gain value; Colour gain values is sent to the first camera, control the first camera and correct the first preview image according to colour gain values, obtain target image.Adopt the method for dual camera shooting, the embodiment of the present invention can improve the shooting effect of filming apparatus.
Refer to Fig. 3, Fig. 3 is the structural representation of a kind of device using dual camera to take disclosed in the embodiment of the present invention.As shown in Figure 3, the device of the use dual camera shooting described in the present embodiment, comprises receiving element 301, judging unit 302, adjustment unit 303, computing unit 304 and correcting unit 305, wherein:
Receiving element 301, the second preview image that the first preview image and second camera for receiving the first camera acquisition obtain.
In the embodiment of the present invention, receiving element 301 receives the first preview image of the first camera acquisition and the second preview image of second camera acquisition, and receiving element 301 can receive the first preview image of the first camera acquisition and the second preview image of second camera acquisition simultaneously.For example, first camera and second camera be the same picture of preview separately, first camera obtains the first preview image, second camera obtains the second preview image simultaneously, and receiving element 301 receives the first preview image of the first camera acquisition and the second preview image of second camera acquisition.
Judging unit 302, for judging whether the first preview image and the second preview image include source region.
In the embodiment of the present invention, first preview image and the second preview image are respectively captured by the first camera and second camera, the difference of the locus residing for two cameras, first preview image and the second preview image have fine distinction, light source may be photographed by first camera, and second camera does not photograph light source, the source region cannot determining that needs are measured can be caused like this.Judging unit 302 judges whether the first preview image and the second preview image include source region can by judging that in the first preview image, whether brightness value is identical more than the shape in the region of the first predetermined luminance value with brightness value in the second preview image more than the shape in the region of the first predetermined luminance value, if identical, then determine that the first preview image and the second preview image include source region, if different, then determine that the first preview image and the second preview image do not include source region.
Adjustment unit 303, for when judging unit judged result is for being, controls second camera and carrying out a light-metering to source region, and adjusting the brightness of the second preview image according to a photometry result, obtaining the second preview correcting image.
In the embodiment of the present invention, when the first preview image and the second preview image include source region, adjustment unit 303 controls second camera and carries out a light-metering to source region, and adjusts the brightness of the second preview image according to a photometry result, obtains the second preview correcting image.For example, adjustment unit 303 controls second camera and carries out a light-metering to source region, obtain a photometry result, if some photometry result display current light source region enters the reflectance lightness value of second camera more than the second predetermined luminance value, adjustment unit 303 turns down the brightness of the second preview image, obtains the second preview correcting image; If some photometry result display current light source region enters the reflectance lightness value of second camera lower than the second predetermined luminance value, adjustment unit 303 heightens the brightness of the second preview image, obtains the second preview correcting image.
Computing unit 304, for calculating the colour gain values of the second preview correcting image source region, colour gain values comprises red gain value, green gain value and blue gain value.
In the embodiment of the present invention, computing unit 304 calculates the colour gain values of the second preview correcting image source region.For example, image processor calculates the red gain value of the second preview correcting image source region, green gain value and blue gain value respectively.
Correcting unit 305, for sending colour gain values to first camera, controlling the first camera and correcting the first preview image according to colour gain values, obtaining target image.
In the embodiment of the present invention, correcting unit 305 sends colour gain values to first camera, controls the first camera and corrects the first preview image according to colour gain values, obtain target image.For example, after correcting unit 305 sends red gain value, green gain value and blue gain value to first camera, control the first camera and red gain value, green gain value and blue gain value are assigned to the first preview image, obtain target image.The Accurate color yield value of source region is obtained by the light-metering of second camera point, image processor sends Accurate color yield value to first camera, thus the first preview picture that the first camera gets can be corrected accurately, obtain white balance target image accurately, improve the shooting effect of filming apparatus.
In the embodiment of the present invention, receiving element 301 receives the first preview image of the first camera acquisition and the second preview image of second camera acquisition; Judging unit 302 judges whether the first preview image and the second preview image include source region; If so, adjustment unit 303 controls second camera and carries out a light-metering to source region, and adjusts the brightness of the second preview image according to a photometry result, obtains the second preview correcting image; Computing unit 304 calculates the colour gain values of the second preview correcting image source region, and colour gain values comprises red gain value, green gain value and blue gain value; Correcting unit 305 sends colour gain values to first camera, controls the first camera and corrects the first preview image according to colour gain values, obtain target image.Adopt the method for dual camera shooting, the embodiment of the present invention can improve the shooting effect of filming apparatus.
Refer to Fig. 4, Fig. 4 is the disclosed another kind of structural representation using the device of dual camera shooting of the embodiment of the present invention.As shown in Figure 4, the device of the use dual camera shooting described in the present embodiment, comprises receiving element 301, judging unit 302, adjustment unit 303, computing unit 304 and correcting unit 305, wherein:
Receiving element 301, adjustment unit 303, computing unit 304 and correcting unit 305 can consult Fig. 3.
Judging unit 302 comprises the first judgment sub-unit 3021 and determining unit 3022.
First judgment sub-unit 3021, for judging that in the first preview image, whether brightness value is identical more than the shape in the region of the first predetermined luminance value with brightness value in the second preview image more than the shape in the region of the first predetermined luminance value.
In the embodiment of the present invention, the first judgment sub-unit 3021 judges that in the first preview image, whether brightness value is identical more than the shape in the region of the first predetermined luminance value with brightness value in the second preview image more than the shape in the region of the first predetermined luminance value.For example, image processor adds up brightness value in the first preview image, and more than in the region of the first predetermined luminance value and the second preview image, brightness value is more than the region of the first predetermined luminance value, and the first judgment sub-unit 3021 judges that in the first preview image, whether brightness value is identical more than the shape in the region of the first predetermined luminance value with brightness value in the second preview image more than the shape in the region of the first predetermined luminance value.
Determining unit 3022, for when the first judgment sub-unit 3021 judged result is for being, then determine that the first preview image and the second preview image include source region, source region be in the first preview image brightness value more than brightness value in the region of the first predetermined luminance value or the second preview image more than the region of the first predetermined luminance value.
In the embodiment of the present invention, source region is determined according to brightness value in the first preview image is identical more than the region of the first predetermined luminance value with brightness value in the second preview image more than the region of the first predetermined luminance value.Determining that the first preview image and the second preview image include identical source region is to ensure that second camera can carry out a light-metering to the source region in the first preview image of the first camera shooting.
In the embodiment of the present invention, receiving element 301 receives the first preview image of the first camera acquisition and the second preview image of second camera acquisition; First judgment sub-unit 3021 judges that in the first preview image, whether brightness value is identical more than the shape in the region of the first predetermined luminance value with brightness value in the second preview image more than the shape in the region of the first predetermined luminance value; If identical, determining unit 3022 determines that the first preview image and the second preview image include source region, source region be in the first preview image brightness value more than brightness value in the region of the first predetermined luminance value or the second preview image more than the region of the first predetermined luminance value; Adjustment unit 303 controls second camera and carries out a light-metering to source region, and adjusts the brightness of the second preview image according to a photometry result, obtains the second preview correcting image; Computing unit 304 calculates the colour gain values of the second preview correcting image source region, and colour gain values comprises red gain value, green gain value and blue gain value; Correcting unit 305 sends colour gain values to first camera, controls the first camera and corrects the first preview image according to colour gain values, obtain target image.Adopt the method for dual camera shooting, the embodiment of the present invention can improve the shooting effect of filming apparatus.
Refer to Fig. 5, Fig. 5 is the disclosed another kind of structural representation using the device of dual camera shooting of the embodiment of the present invention.As shown in Figure 5, the device of the use dual camera shooting described in the present embodiment, comprises receiving element 301, judging unit 302, adjustment unit 303, computing unit 304 and correcting unit 305, wherein:
Receiving element 301 and correcting unit 305 can consult Fig. 3.
Judging unit 302 comprises the first judgment sub-unit 3021 and determining unit 3022, and determining unit 3022 can consult Fig. 3.
First judgment sub-unit 3021 comprises the first process subelement 30211, second and processes subelement 30212, the 3rd process subelement 30213, the 4th process subelement 30214 and the 5th process subelement 30215, wherein:
First process subelement 30211, for being divided into size identical 256 statistics block with the second preview image according to identical partitioning scheme by the first preview image.
Second process subelement 30212, for calculating the brightness value of each statistics block in the brightness value of each statistics block in the first preview image and the second preview image respectively.
3rd process subelement 30213, is greater than brightness value in the first statistics block of the first predetermined luminance value and the second preview image is greater than the second statistics block of the first predetermined luminance value for adding up brightness value in the first preview image.
4th process subelement 30214, for judging that whether the distribution shape of the first statistics block is identical with the distribution shape of the second statistics block.
5th process subelement 30215, for when the distribution shape of the first statistics block is identical with the distribution shape of the second statistics block, then determine that in the first preview image, brightness value is identical more than the shape in the region of the first predetermined luminance value with brightness value in the second preview image more than the shape in the region of the first predetermined luminance value.
In the embodiment of the present invention, first preview image and the second preview image are divided into 256 identical statistics block of size according to identical partitioning scheme by the first process subelement 30211 by the length of the first preview image and the second preview image and widely can be divided into 16 equal portions respectively, obtains 256 rectangle statistics block that size is identical respectively; Second process subelement 30212 calculates the brightness value of each statistics block in the brightness value of each statistics block in the first preview image and the second preview image respectively; 3rd process subelement 30213 is added up brightness value in the first preview image and is greater than brightness value in the first statistics block of the first predetermined luminance value and the second preview image and is greater than the second statistics block of the first predetermined luminance value, here brightness value unit is lux (lx), predetermined luminance value can be set to 100lx according to shooting environmental, 150lx, 200lx, 250lx, 300lx or other predetermined luminance values; If the first predetermined luminance value is 250lx, then statistics block brightness value in the first preview image being greater than 250lx is designated as the first statistics block, and the statistics block that brightness value in the second preview image is greater than 250lx is designated as the second statistics block; 4th process subelement 30214 judges the distribution shape of the first statistics block, and whether whether identical with the distribution shape of the second statistics block can to judge that the first statistics block is distributed in the position that position in the first preview image and the second statistics block be distributed in the second preview image identical; If identical, 5th process 30215, subelement determines that in the first preview image, brightness value is identical more than the shape in the region of the first predetermined luminance value with brightness value in the second preview image more than the shape in the region of the first predetermined luminance value, then determine that the first preview image and the second preview image include source region; If different, then determine that in the first preview image, brightness value is different more than the shape in the region of the first predetermined luminance value from brightness value in the second preview image more than the shape in the region of the first predetermined luminance value, then determine that the first preview image and the second preview image do not include source region.
Adjustment unit 303 comprises measuring unit 3031, second judgment sub-unit 3032 and the first adjustment subelement 3033, wherein:
Measuring unit 3031, enters the reflectance lightness value of second camera for measurement light source region.
Second judgment sub-unit 3032, for judging that whether reflectance lightness value is more than the second predetermined luminance value.
First adjustment subelement 3033, for when the 3rd judgment sub-unit judged result is for being, turning down the brightness of the second preview image, obtaining the second preview correcting image according to the second predetermined luminance value.
In the embodiment of the present invention, measuring unit 3031 controls second camera and carries out to source region a light-metering can enter second camera reflectance lightness value by measurement light source region, obtain a photometry result, reflectance lightness value can reflect for source region the average brightness value entering the light of second camera.Second judgment sub-unit 3032 judging point photometry result be reflectance lightness value more than the second predetermined luminance value, the brightness of the second preview image turned down by the first adjustment 3033, subelement according to the second predetermined luminance value, obtain the second preview correcting image; Second judgment sub-unit 3032 judging point photometry result is that reflectance lightness value is no more than the second predetermined luminance value, then heighten the brightness of the second preview image according to the second predetermined luminance value, obtain the second preview correcting image.It is to obtain normal second preview image of brightness value that control second camera carries out a light-metering to source region, i.e. the second preview correcting image, after only having brightness value normal, the colour gain values ability Measurement accuracy of source region, the white balance in the first preview image could by accurate alignment.
Computing unit 304 comprises the first computation subunit 3041, wherein:
First computation subunit 3041, the colour gain values for according to following formulae discovery second preview correcting image source region:
R-gain=Ymax/Ravg, R-gain are red gain value, and Ymax is the brightness value of the statistics block that in the second preview correcting image source region, brightness value is maximum, and Ravg is red channel average;
G-gain=Ymax/Gavg, G-gain are green gain value, and Ymax is the brightness value of the statistics block that in the second preview correcting image source region, brightness value is maximum, and Gavg is green channel average;
B-gain=Ymax/Bavg, B-gain are blue gain value, and Ymax is the brightness value of the statistics block that in the second preview correcting image source region, brightness value is maximum, and Bavg is blue channel average.
In the embodiment of the present invention, the first computation subunit 3041 calculates the red gain value of the second preview correcting image source region, green gain value and blue gain value respectively.In second preview correcting image source region, the brightness value of the statistics block that brightness value is maximum is the brightness value of statistics block after adjustment unit 303 is calibrated that in the second preview image source region, brightness value is maximum.Channel average can draw according to white balance gray world statistic law.
In the embodiment of the present invention, receiving element 301 receives the first preview image of the first camera acquisition and the second preview image of second camera acquisition; First judgment sub-unit 3021 judges that in the first preview image, whether brightness value is identical more than the shape in the region of the first predetermined luminance value with brightness value in the second preview image more than the shape in the region of the first predetermined luminance value; If identical, determining unit 3022 determines that the first preview image and the second preview image include source region, source region be in the first preview image brightness value more than brightness value in the region of the first predetermined luminance value or the second preview image more than the region of the first predetermined luminance value; Adjustment unit 303 controls second camera and carries out a light-metering to source region, and adjusts the brightness of the second preview image according to a photometry result, obtains the second preview correcting image; Computing unit 304 calculates the colour gain values of the second preview correcting image source region, and colour gain values comprises red gain value, green gain value and blue gain value; Correcting unit 305 sends colour gain values to first camera, controls the first camera and corrects the first preview image according to colour gain values, obtain target image.Adopt the method for dual camera shooting, the embodiment of the present invention can improve the shooting effect of filming apparatus.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment is that the hardware that can carry out instruction relevant by program has come, this program can be stored in a computer-readable recording medium, storage medium can comprise: flash disk, read-only memory (Read-Only Memory, ROM), random access device (Random Access Memory, RAM), disk or CD etc.
Above to the embodiment of the present invention provide a kind of use dual camera to take method and device be described in detail, apply specific case herein to set forth principle of the present invention and execution mode, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1. the method using dual camera to take, is characterized in that, comprising:
Receive the first preview image of the first camera acquisition and the second preview image of second camera acquisition;
Judge whether described first preview image and described second preview image include source region;
If so, control described second camera and a light-metering is carried out to described source region, and according to a brightness of described second preview image of photometry result adjustment, obtain the second preview correcting image;
Calculate the colour gain values of described second preview correcting image source region, described colour gain values comprises red gain value, green gain value and blue gain value;
Send described colour gain values to described first camera, control described first camera and correct described first preview image according to described colour gain values, obtain target image.
2. method according to claim 1, is characterized in that, describedly judges whether described first preview image and described second preview image include source region and comprise:
Judge that in described first preview image, whether brightness value is identical more than the shape in the region of the first predetermined luminance value with brightness value in described second preview image more than the shape in the region of the first predetermined luminance value;
If identical, then determine that described first preview image and described second preview image include described source region, described source region is that in described first preview image, brightness value to exceed in the region of described first predetermined luminance value or described second preview image brightness value more than the region of the first predetermined luminance value.
3. method according to claim 2, it is characterized in that, describedly to judge in described first preview image that whether brightness value is identical more than the shape in the region of the first predetermined luminance value with brightness value in described second preview image more than the shape in the region of the first predetermined luminance value and comprise:
Described first preview image is divided into 256 identical statistics block of size with described second preview image according to identical partitioning scheme;
Calculate the brightness value of each statistics block in the brightness value of each statistics block in described first preview image and described second preview image respectively;
Add up brightness value in described first preview image to be greater than brightness value in the first statistics block of described first predetermined luminance value and described second preview image and to be greater than the second statistics block of described first predetermined luminance value;
Judge that whether the distribution shape of described first statistics block is identical with the distribution shape of described second statistics block;
If identical, then determine that in described first preview image, brightness value is identical more than the shape in the region of the first predetermined luminance value with brightness value in described second preview image more than the shape in the region of the first predetermined luminance value.
4. method according to claim 1, is characterized in that, the described second camera of described control carries out a light-metering to described source region, and according to a brightness of described second preview image of photometry result adjustment, obtains the second preview correcting image and comprise:
Measure the reflectance lightness value that described source region enters described second camera;
Judge that whether described reflectance lightness value is more than the second predetermined luminance value;
If exceed, then turn down the brightness of described second preview image according to described second predetermined luminance value, obtain described second preview correcting image.
5. method according to claim 1, is characterized in that, the colour gain values of the described second preview correcting image source region of described calculating comprises:
Colour gain values according to the second preview correcting image source region described in following formulae discovery:
R-gain=Ymax/Ravg, described R-gain are red gain value, and described Ymax is the brightness value of the statistics block that in described second preview correcting image source region, brightness value is maximum, and described Ravg is red channel average;
G-gain=Ymax/Gavg, described G-gain are green gain value, and described Ymax is the brightness value of the statistics block that in described second preview correcting image source region, brightness value is maximum, and described Gavg is green channel average;
B-gain=Ymax/Bavg, described B-gain are blue gain value, and described Ymax is the brightness value of the statistics block that in described second preview correcting image source region, brightness value is maximum, and described Bavg is blue channel average.
6. the device using dual camera to take, is characterized in that, comprising:
Receiving element, the second preview image that the first preview image and second camera for receiving the first camera acquisition obtain;
Judging unit, for judging whether described first preview image and described second preview image include source region;
Adjustment unit, for when described judging unit judged result is for being, controls described second camera and carrying out a light-metering to described source region, and according to a brightness of described second preview image of photometry result adjustment, obtains the second preview correcting image;
Computing unit, for calculating the colour gain values of described second preview correcting image source region, described colour gain values comprises red gain value, green gain value and blue gain value;
Correcting unit, for sending described colour gain values to described first camera, controlling described first camera and correcting described first preview image according to described colour gain values, obtaining target image.
7. device according to claim 6, is characterized in that, described judging unit comprises:
First judgment sub-unit, for judging that in described first preview image, whether brightness value is identical more than the shape in the region of the first predetermined luminance value with brightness value in described second preview image more than the shape in the region of the first predetermined luminance value;
Determining unit, for when described first judgment sub-unit judged result is for being, then determine that described first preview image and described second preview image include described source region, described source region is that in described first preview image, brightness value to exceed in the region of described first predetermined luminance value or described second preview image brightness value more than the region of the first predetermined luminance value.
8. device according to claim 7, is characterized in that, described first judgment sub-unit comprises:
First process subelement, for being divided into size identical 256 statistics block with described second preview image according to identical partitioning scheme by described first preview image;
Second process subelement, for calculating the brightness value of each statistics block in the brightness value of each statistics block in described first preview image and described second preview image respectively;
3rd process subelement, is greater than brightness value in the first statistics block of described first predetermined luminance value and described second preview image is greater than the second statistics block of described first predetermined luminance value for adding up brightness value in described first preview image;
4th process subelement, for judging that whether the distribution shape of described first statistics block is identical with the distribution shape of described second statistics block;
5th process subelement, for when the distribution shape of described first statistics block is identical with the distribution shape of described second statistics block, then determine that in described first preview image, brightness value is identical more than the shape in the region of the first predetermined luminance value with brightness value in described second preview image more than the shape in the region of the first predetermined luminance value.
9. device according to claim 6, is characterized in that, described adjustment unit comprises:
Measuring unit, enters the reflectance lightness value of described second camera for measuring described source region;
Second judgment sub-unit, for judging that whether described reflectance lightness value is more than the second predetermined luminance value;
First adjustment subelement, for when described 3rd judgment sub-unit judged result is for being, turning down the brightness of described second preview image, obtaining described second preview correcting image according to described second predetermined luminance value.
10. device according to claim 6, is characterized in that, described computing unit comprises:
First computation subunit, the colour gain values for according to the second preview correcting image source region described in following formulae discovery:
R-gain=Ymax/Ravg, described R-gain are red gain value, and described Ymax is the brightness value of the statistics block that in described second preview correcting image source region, brightness value is maximum, and described Ravg is red channel average;
G-gain=Ymax/Gavg, described G-gain are green gain value, and described Ymax is the brightness value of the statistics block that in described second preview correcting image source region, brightness value is maximum, and described Gavg is green channel average;
B-gain=Ymax/Bavg, described B-gain are blue gain value, and described Ymax is the brightness value of the statistics block that in described second preview correcting image source region, brightness value is maximum, and described Bavg is blue channel average.
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