CN106161980A - Photographic method and system based on dual camera - Google Patents
Photographic method and system based on dual camera Download PDFInfo
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- CN106161980A CN106161980A CN201610619497.4A CN201610619497A CN106161980A CN 106161980 A CN106161980 A CN 106161980A CN 201610619497 A CN201610619497 A CN 201610619497A CN 106161980 A CN106161980 A CN 106161980A
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- 238000000034 method Methods 0.000 title claims abstract description 63
- 230000009977 dual effect Effects 0.000 title claims abstract description 55
- 230000003760 hair shine Effects 0.000 claims abstract description 12
- 238000001514 detection method Methods 0.000 claims description 25
- 230000004927 fusion Effects 0.000 claims description 18
- 150000001875 compounds Chemical class 0.000 claims 1
- 238000003384 imaging method Methods 0.000 abstract description 28
- 230000000694 effects Effects 0.000 abstract description 6
- 230000008569 process Effects 0.000 description 15
- 230000006870 function Effects 0.000 description 8
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- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 6
- 235000003140 Panax quinquefolius Nutrition 0.000 description 6
- 235000008434 ginseng Nutrition 0.000 description 6
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- 230000008859 change Effects 0.000 description 3
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/95—Computational photography systems, e.g. light-field imaging systems
- H04N23/951—Computational photography systems, e.g. light-field imaging systems by using two or more images to influence resolution, frame rate or aspect ratio
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Abstract
A kind of photographic method based on dual camera, is applied in electronic equipment, and described method includes: obtain the first light exposure of the first camera and the second light exposure of second camera；The first count adjusting described first camera according to described first light exposure shines parameter, and adjusts the second count of described second camera according to parameter according to described second light exposure；When receiving photographing instruction, control described first camera and carry out shooting to destination object and obtain the first image and control described second camera and shooting is carried out to described destination object obtain the second image；And described first image and described second image are merged, generate target image.The present invention also provides a kind of camera system based on dual camera.Utilize the present invention can effectively improve background overexposure under backlight scene or the dark situation of foreground target object, obtain full figure and expose image accurately, optimize image quality, improve imaging effect, promote Consumer's Experience.
Description
Technical field
The present invention relates to digital image processing techniques field, particularly relate to a kind of photographic method based on dual camera and be
System.
Background technology
Now, the function of electronic equipment gets more and more, and camera function is one of them, and the quality of effect of taking pictures is to evaluate
The good and bad important indicator of described electronic equipment.In the case that illumination condition is undesirable, especially under backlight environment, how to clap
The image having gone out is particularly important.
Traditional electronic equipment, employing is all that single camera is taken pictures image.Single camera due to the restriction of light-metering own,
Under backlight environment, easily occur that bright areas becomes white because of over-exposed, and dark area becomes black because of under-exposure
Look.It if background overexposure or prospect excessively dark phenomenon occurs in the image taken pictures, is the visual effect that can have a strong impact on image.
Such as, it, when using center light-metering, under backlight environment, is easy for occurring that prospect exposure is normal, but the phenomenon of background overexposure；Use
It during average metering, under backlight environment, is easy for occurring that foreground subject is dark, and the phenomenon of the serious overexposure of background.Additionally, it is single
When camera processes the image taken pictures under backlight environment, based on being mainly to draw bright prospect, the image after process lacks details.
Content of the invention
In view of the foregoing, it is necessary to a kind of photographic method based on dual camera and system are provided, can effectively improve
Background overexposure or the dark situation of foreground target object under backlight scene, obtain full figure and expose image accurately, optimize image quality,
Improve imaging effect, promote Consumer's Experience.
A kind of photographic method based on dual camera, is applied in electronic equipment, on the same side of described electronic equipment
Being provided with the first camera and second camera, described method includes:
Obtain the first light exposure of described first camera and the second light exposure of described second camera；
The first count adjusting described first camera according to described first light exposure shines parameter, and exposes according to described second
Light quantity adjusts the second count of described second camera according to parameter；
When receiving photographing instruction, control described first camera destination object is carried out shooting obtain the first image with
And control described second camera and shooting is carried out to described destination object obtain the second image；And
Described first image and described second image are merged, generates target image.
According to a preferred embodiment of the present invention, described the first light exposure obtaining described first camera and described the
Second light exposure of two cameras includes:
The algorithm of target detection prestoring is used to identify prospect from the image of described first camera capture, sensing
Light exposure on described prospect image obtains described first light exposure；And
The algorithm of target detection prestoring described in employing identifies background from the image that described second camera captures,
Sense the light exposure on described background video and obtain described second light exposure.
According to a preferred embodiment of the present invention,
The first count adjusting described first camera according to described first light exposure includes according to parameter:
Identify each pixel of described prospect the mean value calculating described foreground pixel；
The mean value of described foreground pixel and first threshold set in advance are compared；And
When the mean value of described foreground pixel is less than described first threshold set in advance, adjust described first count according to ginseng
Number is to increase described first light exposure, and described first count includes aperture, shutter and speed according to parameter；
The second count adjusting described second camera according to described second light exposure includes according to parameter:
Identify each pixel of described background the mean value calculating described background pixel；
The mean value of described background pixel and Second Threshold set in advance are compared；And
When the mean value of described background pixel is higher than described Second Threshold set in advance, adjust described second count according to ginseng
Number is to reduce described second light exposure, and described second count includes aperture, shutter and speed according to parameter.According to the present invention one
Preferred embodiment,
The first count adjusting described first camera according to described first light exposure includes according to parameter:
Identify each pixel value of described prospect；
Add up the pixel value of described prospect to meet the number of pixels of the first scope set in advance and account for the total pixel of described prospect
Percentage；And
When described percentage is less than the first percentage set in advance, adjust described first count described to increase according to parameter
First light exposure, described first count includes according to parameter: aperture, shutter and speed；
The second count adjusting described second camera according to described second light exposure includes according to parameter:
Identify each pixel value of described background；
Add up the pixel value of described background to meet the number of pixels of the second scope set in advance and account for the total pixel of described background
Percentage；And
When described percentage is less than the second percentage set in advance, adjust described second count described to reduce according to parameter
Second light exposure, described first count includes aperture, shutter and speed according to parameter.
According to a preferred embodiment of the present invention, described method also includes:
Reject pixel value in described prospect and be less than the pixel of the first preset value；And/or
Reject pixel value in described background and be more than the pixel of the second preset value.
A kind of camera system based on dual camera, is installed in electronic equipment, on the same side of described electronic equipment
Being provided with the first camera and second camera, described system includes:
Acquisition module, the second exposure of the first light exposure and described second camera for obtaining described first camera
Amount；
Adjusting module, the first count for adjusting described first camera according to described first light exposure shines parameter, and
Adjust the second count of described second camera according to described second light exposure according to parameter；
Control module, for when receiving photographing instruction, controls described first camera and shoots destination object
Obtain the first image and control described second camera and shooting is carried out to described destination object obtain the second image；And
Fusion Module, for merging described first image and described second image, generates target image.
According to a preferred embodiment of the present invention, described acquisition module obtains the first light exposure of described first camera
And the second light exposure of described second camera includes:
The algorithm of target detection prestoring is used to identify prospect from the image of described first camera capture, sensing
Light exposure on described prospect image obtains described first light exposure；And
The algorithm of target detection prestoring described in employing identifies background from the image that described second camera captures,
Sense the light exposure on described background video and obtain described second light exposure.
According to a preferred embodiment of the present invention,
The first count that described adjusting module adjusts described first camera according to described first light exposure includes according to parameter:
Identify each pixel of described prospect the mean value calculating described foreground pixel；
The mean value of described foreground pixel and first threshold set in advance are compared；And
When the mean value of described foreground pixel is less than described first threshold set in advance, adjust described first count according to ginseng
Number is to increase described first light exposure, and described first count includes aperture, shutter and speed according to parameter；
The second count that described adjusting module adjusts described second camera according to described second light exposure includes according to parameter:
Identify each pixel of described background the mean value calculating described background pixel；
The mean value of described background pixel and Second Threshold set in advance are compared；And
When the mean value of described background pixel is higher than described Second Threshold set in advance, adjust described second count according to ginseng
Number is to reduce described second light exposure, and described second count includes aperture, shutter and speed according to parameter.
According to a preferred embodiment of the present invention,
The first count that described adjusting module adjusts described first camera according to described first light exposure includes according to parameter:
Identify each pixel value of described prospect；
Add up the pixel value of described prospect to meet the number of pixels of the first scope set in advance and account for the total pixel of described prospect
Percentage；And
When described percentage is less than the first percentage set in advance, adjust described first count described to increase according to parameter
First light exposure, described first count includes aperture, shutter and speed according to parameter；
The second count that described adjusting module adjusts described second camera according to described second light exposure includes according to parameter:
Identify each pixel value of described background；
Add up the pixel value of described background to meet the number of pixels of the second scope set in advance and account for the total pixel of described background
Percentage；And
When described percentage is less than the second percentage set in advance, adjust described second count described to reduce according to parameter
Second light exposure, described first count includes aperture, shutter and speed according to parameter.
According to a preferred embodiment of the present invention, described Fusion Module is additionally operable to:
Reject pixel value in described prospect and be less than the pixel of the first preset value；And/or
Reject pixel value in described background and be more than the pixel of the second preset value.
The present invention based on the photographic method of dual camera and system, can effectively improve under backlight scene background overexposure or
The dark situation of foreground subject, obtains full figure and exposes image accurately, well tell profile and the degree of depth of prospect, before can allowing
The effect at the bright place of scape is distinct, and the place of dark can retain more minutia, improves the thin of image dark portion and highlights
Joint performance, thus improve the quality of image.
Brief description
Fig. 1 is the structural representation of the preferred embodiment of the electronic equipment that the present invention runs the photographic method based on dual camera
Figure.
Fig. 2 is the flow chart of the preferred embodiment based on the photographic method of dual camera for the present invention.
Fig. 3 is the functional block diagram of the preferred embodiment based on the camera system of dual camera for the present invention.
Main element symbol description
Detailed description of the invention
In order to make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the accompanying drawings with specific embodiment pair
The present invention is described in detail.Obviously, described embodiment is only a part of embodiment of the present invention, rather than whole
Embodiment.It moreover, it will be appreciated that specific embodiments described herein, only in order to explain the present invention, is not used to limit this
Bright.
As it is shown in figure 1, be that the present invention is for running the electronic equipment preferred embodiment of the photographic method based on dual camera
Hardware structure schematic diagram.As shown in this hardware structure schematic diagram, electronic equipment 1 includes, but not limited to based on dual camera
Camera system the 10th, memory cell the 20th, processing unit the 30th, the first camera 40 and second camera 50.
Preferably, the present invention based on dual camera photographic method by described electronic equipment 1 based on double shootings
The camera system 10 of head realizes.
Described electronic equipment 1 include a kind of can according to the instruction being previously set or storing, automatically carry out numerical computations and/
Or the electronic equipment of information processing, its hardware includes but is not limited to microprocessor, special IC, programmable gate array, number
WP, embedded device etc..Described electronic equipment 1 may also include user equipment.Described user equipment includes but is not limited to
Any electronics that can be carried out man-machine interaction with user by modes such as keyboard, mouse, remote controller, touch pad or voice-operated devices
Product, for example, panel computer, smart mobile phone, personal digital assistant and other any imagings possessing dual camera (the 40th, 50) set
Standby etc..Wherein, the network residing for described user equipment includes but is not limited to internet, wide area network, Metropolitan Area Network (MAN), LAN, virtual
Dedicated network etc..
It should be noted that described user equipment is only for example, other user equipmenies that are existing or that be likely to occur from now on
It as being adaptable to the present invention, within also should being included in protection scope of the present invention, and is incorporated herein with way of reference.
In the present embodiment, described memory cell 20 is satisfied with in described electronic equipment 1 for storage software program and
Data, for example described camera system 10 based on dual camera.This memory cell 20 can be that the inside of described electronic equipment 1 is deposited
Storage unit, the hard disk of for example described electronic equipment 1 or internal memory.This memory cell 20 also can be outside described electronic equipment 1
Portion's storage device, such as plug-in type hard disk on described electronic equipment 1, smart media card (Smart Media Card, SMC),
The storage elements such as safe digital card (Secure Digital Card, SD), flash memory cards (flash card).Further
Ground, described memory cell 20 can also both include the internal storage unit of described electronic equipment 1, it is also possible to includes that outside storage sets
Standby.
In the present embodiment, being previously stored with algorithm of target detection in described memory cell 20, first count is according to parameter, second count
According to parameter etc..Described first count includes according to parameter: aperture, shutter and speed etc., and described second count includes according to parameter: aperture,
Shutter and speed etc..
In the present embodiment, described processing unit 30 is one or more central processing unit (Central
Processing unit, CPU), microprocessor or other digital processing chips etc..This processing unit 30 is used for performing software journey
Sequence code or operational data, for example, perform the described camera system 10 based on dual camera.In the present embodiment, described first
Camera 40 and described second camera 50 are positioned at the same side of described electronic equipment 1, are respectively used to shooting and comprise personage, move
The promising image of the tool such as thing.Described first camera 40 and second camera 50 are provided with such as Charged Couple (charge-
Coupled device, CCD) photo-sensitive cell of formula, described photo-sensitive cell can be used for sensing and enters the light in camera.One
In a little embodiments, described first camera 40 and described second camera 50 can be fixed camera or can
Revolving camera.
As in figure 2 it is shown, be the flow chart of the preferred embodiment of image processing method of the present invention.According to different demands, should
In flow chart, the order of step can change, and some step can be omitted.
S200, obtains the first light exposure of described first camera 40 and the second light exposure of described second camera 50.
In the present embodiment, described first camera 40 and described second camera 50 are arranged close to side by side at described electronics
It on one side of equipment 1, is mainly used in capturing the image comprising destination object and when receiving photographing instruction to institute
State destination object to take pictures.
In the present embodiment, the first light exposure of described first camera 40 can photosensitive by described first camera 40
Element obtains；Second light exposure of described second camera 50 can be obtained by the photo-sensitive cell of described second camera 50.
In the present embodiment, described first camera 40 may be used for the light exposure of survey prospect, described second camera 50
May be used for surveying the light exposure of background.In other embodiments, described first camera 40 may be used for surveying the light exposure of background,
Described second camera 50 may be used for the light exposure of survey prospect.Described first camera 40 of concrete employing or described second is taken the photograph
As a light exposure for 50 survey prospects can be carried out default setting in advance by the described camera system 10 based on dual camera, it is possible to by
User arranges voluntarily according to personal like or according to the performance of the first camera 40 and described second camera 50, changes.
Survey the light exposure of prospect below with described first camera 40, the light exposure that described second camera 50 surveys background is
Example illustrates.
Described electronic equipment 1 is previously stored with algorithm of target detection.Described algorithm of target detection can be foreground target
Detection algorithm, it is also possible to be target context detection algorithm, described algorithm of target detection includes, but are not limited to: frame differential method, the back of the body
Scape relief method, optical flow method or the foreground target detection algorithm based on Gauss model.The described camera system based on dual camera
10 use the algorithm of target detection prestoring from the image comprising destination object of described first camera 40 capture
Identify prospect, then sense the light exposure on described prospect image and obtain described first light exposure.Described prospect refers to target
Object, for example, people, animal, or vehicle etc..Described first light exposure is the light exposure of each pixel on described prospect image.
In like manner, the described camera system 10 based on dual camera use described in the algorithm of target detection that prestores from described
The image comprising destination object of second camera 50 capture identifies background, then senses on described background video
Light exposure obtains described second light exposure.Described background refers to scratch the image after removing described destination object.Described second exposure
Amount is the light exposure of each pixel on described background video.
S202, the first count adjusting described first camera 40 according to described first light exposure shines parameter, and according to institute
State the second light exposure and adjust the second count of described second camera 50 according to parameter.
In first embodiment, relatively more described first light exposure of the described imaging system 10 based on dual camera is with in advance
The first threshold setting draws the first result, and relatively more described second light exposure draws the second knot with Second Threshold set in advance
Really；The first count adjusting described first camera 40 according to described first result shines parameter, adjusts institute according to described second result
State the second count of second camera 50 according to parameter.
Detailed process is as follows:
After the described imaging system 10 based on dual camera gets described first light exposure, identify each of described prospect
Pixel the mean value calculating described foreground pixel, then by the mean value of described foreground pixel and the first threshold set in advance
Value compares, and adjusts the first count of described first camera 40 according to parameter according to comparative result.Described first count is according to parameter bag
Include: aperture, shutter and speed etc..
When the mean value of described foreground pixel is less than described first threshold set in advance, described first light exposure is described
Deficiency, the light exposure of i.e. described prospect is not enough, and the destination object in shooting image out is partially dark, described based on dual camera
Imaging system 10 adjusts described first count according to parameter to increase described first light exposure.In the present embodiment, described take the photograph based on double
As the imaging system 10 of head by increasing aperture, or can improve shutter speed, or increase time for exposure raising speed
Increase described first light exposure etc..
When the mean value of described foreground pixel is greater than or equal to described first threshold set in advance, illustrate described first
Light exposure is normal, and the light exposure of i.e. described prospect is normal, and the destination object brightness in shooting image out is suitable, described based on
The imaging system 10 of dual camera need not adjust the first acquisition parameters of described first camera 40.
In like manner, after the described imaging system 10 based on dual camera gets described second light exposure, described background is identified
Pixel the mean value calculating described background pixel, then by the mean value of described background pixel and the second threshold set in advance
Value compares, and adjusts the second count of described second camera 50 according to parameter according to comparative result.Described second count is according to parameter bag
Include: aperture, shutter and speed etc..
When the mean value of described background pixel is higher than described Second Threshold set in advance, described second light exposure is described
Excessive, the light exposure of i.e. described background is excessive, and the background in shooting image out is too bright, the described imaging based on dual camera
System 10 adjusts described second count according to parameter to reduce described second light exposure.In the present embodiment, described based on dual camera
Imaging system 10 can by reduce aperture, or reduce shutter speed, or reduce the time for exposure reduce speed subtract
Few described second light exposure etc..
When the mean value of described foreground pixel is less than or equal to described Second Threshold set in advance, illustrate described second
Light exposure is normal, and the light exposure of i.e. described background is normal, and the background luminance in shooting image out is suitable, described takes the photograph based on double
As the imaging system 10 of head need not adjust the second acquisition parameters of described second camera 50.
In the second embodiment, relatively more described first light exposure of the described imaging system 10 based on dual camera is with in advance
The first scope setting draws the first result, and relatively more described second light exposure draws the second knot with the second scope set in advance
Really；The first count adjusting described first camera 40 according to described first result shines parameter, adjusts institute according to described second result
State the second count of second camera 50 according to parameter.
Detailed process is as follows:
After the described imaging system 10 based on dual camera gets described first light exposure, identify each of described prospect
Individual pixel value, then adds up the pixel value of described prospect and meets the number of pixels of the first scope set in advance to account for described prospect total
The percentage of pixel, adjusts the first count of described first camera 40 according to parameter according to the result added up.Described first count shines
Parameter includes: aperture, shutter and speed etc..
When described percentage is less than the first percentage set in advance, illustrate that described first light exposure is not enough, i.e. described
The light exposure of prospect is not enough, and the destination object in shooting image out is partially dark, the described imaging system 10 based on dual camera
Adjust described first count according to parameter to increase described first light exposure.In the present embodiment, the described imaging based on dual camera
System 10 by increasing aperture, or can improve shutter speed, or the increase time for exposure improves speed and increases described
First light exposure etc..
When described percentage is greater than or equal to described first percentage set in advance, described first light exposure is being described just
Often, the light exposure of i.e. described prospect is normal, and the destination object brightness in shooting image out is suitable, described based on dual camera
Imaging system 10 need not adjust the first acquisition parameters of described first camera 40.
In like manner, after the described imaging system 10 based on dual camera gets described second light exposure, the described back of the body is identified
Each pixel value of scape, then adds up the pixel value of described background and meets the number of pixels of the second scope set in advance and account for described
The percentage of the total pixel of prospect, adjusts the second count of described second camera 50 according to parameter according to the result added up.Described
Two parameters of taking pictures include: aperture, shutter and speed etc..
When described percentage is less than the second percentage set in advance, illustrate that described second light exposure is not enough, i.e. described
The light exposure of background is not enough, and the destination object in shooting image out is partially dark, the described imaging system 10 based on dual camera
Adjust described second count according to parameter to reduce described second light exposure.In the present embodiment, the described imaging based on dual camera
System 10 by reduction aperture, or can reduce shutter speed, or the minimizing time for exposure reduces speed and reduces described
Second light exposure etc..
When described percentage is greater than or equal to described second percentage set in advance, described second light exposure is being described just
Often, the light exposure of i.e. described background is normal, and the destination object brightness in shooting image out is suitable, described based on dual camera
Imaging system 10 need not adjust the second acquisition parameters of described second camera 50.
S204, when receiving photographing instruction, controls described first camera 40 and carries out shooting to destination object and obtain
One image and control described second camera 50 and shooting is carried out to described destination object obtain the second image.
In the present embodiment, after the described camera system 10 based on dual camera gets the photographing instruction of user, control
Described first camera 40 and described second camera 50 shoot described destination object respectively.Described photographing instruction can by with
Lower a kind of or multiple combination mode triggers: clicks on imaging icon, click on shoot button, Bluetooth transmission instruction, speech recognition (example
Such as " taking pictures " password or " OK " password etc.), gesture identification (for example, " V " gesture or " OK " gesture etc.), Expression Recognition (example
Such as smiling face etc.) etc..
Spend the time less so that shoot described destination object, described first camera 40 and described second camera
50 can be carried out for the shooting action shooting described destination object simultaneously.In other embodiments, described first camera 40
For shooting, the shooting action of described destination object also can asynchronous be carried out with described second camera 50, for example, and described first
Camera 40 preferentially shoots described destination object, and after Preset Time (for example, 1 second), described second camera 50 shoots again
Described destination object.
Described first image and described second image are merged by S206, generate target image.
In the present embodiment, described electronic equipment 1 is previously stored with Image Fusion, described Image Fusion bag
Include: based on non-multi-scale transform image interfusion method (such as average weighted method, based on PCA image interfusion method, based on
The image interfusion method etc. of modulation), (for example melt based on the image of pyramid transform based on the image interfusion method of multi-scale transform
Conjunction method, the fusion method based on wavelet transformation, the image interfusion method etc. based on warp wavelet).The present invention can use
Image Fusion is not limited to the above-mentioned method enumerated, and can also include that other existing or that be likely to occur from now on are suitable for
The method that image is merged.In addition, cited Image Fusion is prior art, the present invention does not solves one by one at this
Release.
In the present embodiment, before the described imaging system 10 based on dual camera will be shot by described first camera 40
Scape cutting is out out spliced with the background cutting being shot by described second camera 50, obtains an exposure suitably figure
Picture.
Further, in order to improve the quality of the target image after fusion, described target image visual effect is made more to manage
Thinking, in other embodiments, the described imaging method based on dual camera can also include: carries out pre-to described first image
Process obtains the first process image, carries out pretreatment to described second image and obtains the second process image；Process described first
Image and described second process image merge, and obtain target image.
In the present embodiment, carry out pretreatment to described first image and may include that in the described prospect of rejecting, pixel value is little
Pixel in the first preset value.Rejecting pixel value in described prospect is to protect further less than the pixel of described first preset value
Demonstrate,prove a small amount of in described prospect or extremely individual other appearance deficient exposure phenomenon pixel.Carry out pretreatment to described second image can wrap
Include: reject pixel value in described background and be more than the pixel of the second preset value.Reject pixel value in described background and be more than described second
The pixel of preset value is to be further ensured that a small amount of in described background or extremely individual other pixel overexposure phenomenon occur.
In other embodiments, carry out pretreatment to described first image and described second image can also include: image
Strengthen, noise eliminates.Described image enhaucament and noise eliminate and belong to prior art, do not do related description herein.
In sum, the imaging method based on dual camera of the present invention is used for using dual camera (the first shooting
40 and second camera 50) destination object is shot, first obtain the first exposure of described first camera 40 during shooting
Amount and the second light exposure of described second camera 50, adjust institute respectively according to described first light exposure and described second light exposure
The second count stating the first count of the first camera 40 according to parameter and described second camera 50 is according to parameter, when receiving photographing instruction
When, control described first camera 40 and the image comprising described destination object is carried out by described second camera 50 respectively
Shooting obtains the first image and the second image, and merges described first image and described second image, generates target figure
Picture.Can effectively improve background overexposure under backlight scene or the dark situation of foreground subject by the present invention, obtain full figure and expose
Light image accurately, well tells profile and the degree of depth of prospect, and the effect at the bright place of prospect can be allowed distinct, and the place of dark
More minutia can be retained again, improve the details performance of image dark portion and highlights.
As it is shown on figure 3, the described imaging system 10 based on dual camera includes that the 100th, acquisition module arranges module and the 101st, adjust
Mould preparation block the 102nd, control module 103 and Fusion Module 104.The present invention 4 modules claiming refer to that one can be processed equipment 30
Series of computation machine program segment that is performed and that can complete fixing function, it is stored in storage device 20.In this enforcement
In example, the function with regard to each module will describe in detail in follow-up embodiment.
Described acquisition module 100, for obtaining the first light exposure of described first camera 40 and described second camera
Second light exposure of 50.
In the present embodiment, described first camera 40 and described second camera 50 are arranged close to side by side at described electronics
It on one side of equipment 1, is mainly used in capturing the image comprising destination object and when receiving photographing instruction to institute
State destination object to take pictures.
In the present embodiment, the first light exposure of described first camera 40 can photosensitive by described first camera 40
Element obtains；Second light exposure of described second camera 50 can be obtained by the photo-sensitive cell of described second camera 50.
In the present embodiment, described first camera 40 may be used for the light exposure of survey prospect, described second camera 50
May be used for surveying the light exposure of background.In other embodiments, described first camera 40 may be used for surveying the light exposure of background,
Described second camera 50 may be used for the light exposure of survey prospect.Described first camera 40 of concrete employing or described second is taken the photograph
As a light exposure for 50 survey prospects can be carried out default setting in advance by the described module 101 that arranges, it is possible to by user according to individual
Like or arrange voluntarily according to the performance of the first camera 40 and described second camera 50, change.
Survey the light exposure of prospect below with described first camera 40, the light exposure that described second camera 50 surveys background is
Example illustrates.
Described electronic equipment 1 is previously stored with algorithm of target detection.Described algorithm of target detection can be foreground target
Detection algorithm, it is also possible to be target context detection algorithm, described algorithm of target detection includes, but are not limited to: frame differential method, the back of the body
Scape relief method, optical flow method or the foreground target detection algorithm based on Gauss model.Described acquisition module 100 uses and prestores
Algorithm of target detection from described first camera 40 capture the image comprising destination object identify prospect, then
Sense the light exposure on described prospect image and obtain described first light exposure.Described prospect refers to destination object, for example, people, dynamic
Thing, or vehicle etc..Described first light exposure is the light exposure of each pixel on described prospect image.
In like manner, described acquisition module 100 use described in the algorithm of target detection that prestores from described second camera 50
The image comprising destination object of capture identifies background, then senses the light exposure on described background video and obtain institute
State the second light exposure.Described background refers to scratch the image after removing described destination object.Described second light exposure is described background
The light exposure of each pixel on image.
Described adjusting module 102, the first count adjusting described first camera 40 according to described first light exposure shines parameter,
And adjust the second count of described second camera 50 according to parameter according to described second light exposure.
In first embodiment, relatively more described first light exposure of described adjusting module 102 and the first threshold set in advance
Being worth the first result, relatively more described second light exposure draws the second result with Second Threshold set in advance；According to described
The first count that one result adjusts described first camera 40 shines parameter, adjusts described second camera 50 according to described second result
Second count according to parameter.
Detailed process is as follows:
After described acquisition module 100 gets described first light exposure, identify each pixel of described prospect and calculate
The mean value of described foreground pixel, then described adjusting module 102 is by the mean value of described foreground pixel and set in advance the
One threshold value compares, and adjusts the first count of described first camera 40 according to parameter according to comparative result.Described first count is according to ginseng
Number includes: aperture, shutter and speed etc..
When the mean value of described foreground pixel is less than described first threshold set in advance, described first light exposure is described
Deficiency, the light exposure of i.e. described prospect is not enough, and the destination object in shooting image out is partially dark, and described adjusting module 102 is adjusted
Whole described first count shines parameter to increase described first light exposure.In the present embodiment, described adjusting module 102 can be by adding
Large aperture, or improve shutter speed, or the increase time for exposure improves speed and increases described first light exposure etc..
When the mean value of described foreground pixel is greater than or equal to described first threshold set in advance, illustrate described first
Light exposure is normal, and the light exposure of i.e. described prospect is normal, and the destination object brightness in shooting image out is suitable, described adjustment
Module 102 need not adjust the first acquisition parameters of described first camera 40.
In like manner, after described acquisition module 100 gets described second light exposure, identify described background pixel and calculate institute
Stating the mean value of background pixel, then described adjusting module 102 is by the mean value of described background pixel and set in advance second
Threshold value compares, and adjusts the second count of described second camera 50 according to parameter according to comparative result.Described second count is according to parameter
Including: aperture, shutter and speed etc..
When the mean value of described background pixel is higher than described Second Threshold set in advance, described second light exposure is described
Excessive, the light exposure of i.e. described background is excessive, and the background in shooting image out is too bright, and described adjusting module 102 adjusts institute
State second count according to parameter to reduce described second light exposure.In the present embodiment, described adjusting module 102 can be by reducing light
Circle, or reduce shutter speed, or the minimizing time for exposure reduces speed and reduces described second light exposure etc..
When the mean value of described foreground pixel is less than or equal to described Second Threshold set in advance, illustrate described second
Light exposure is normal, and the light exposure of i.e. described background is normal, and the background luminance in shooting image out is suitable, described adjusting module
102 the second acquisition parameters that need not adjust described second camera 50.
In the second embodiment, relatively more described first light exposure of described adjusting module 102 and the first model set in advance
Enclosing and drawing the first result, relatively more described second light exposure draws the second result with the second scope set in advance；According to described
The first count that one result adjusts described first camera 40 shines parameter, adjusts described second camera 50 according to described second result
Second count according to parameter.
Detailed process is as follows:
After described acquisition module 100 gets described first light exposure, identify each pixel value of described prospect, then
Adjusting module 102 is added up the pixel value of described prospect and is met the number of pixels of the first scope set in advance and account for the total picture of described prospect
The percentage of element, adjusts the first count of described first camera 40 according to parameter according to the result added up.Described first count is according to ginseng
Number includes: aperture, shutter and speed etc..
When described percentage is less than the first percentage set in advance, illustrate that described first light exposure is not enough, i.e. described
The light exposure of prospect is not enough, and the destination object in shooting image out is partially dark, and described adjusting module 102 adjusts described first count
According to parameter to increase described first light exposure.In the present embodiment, described adjusting module 102 can by strengthen aperture, or
Improve shutter speed, or the increase time for exposure improves speed and increases described first light exposure etc..
When described percentage is greater than or equal to described first percentage set in advance, described first light exposure is being described just
Often, the light exposure of i.e. described prospect is normal, and the destination object brightness in shooting image out is suitable, described adjusting module 102
The first acquisition parameters of described first camera 40 need not be adjusted.
In like manner, after described acquisition module 100 gets described second light exposure, each pixel of described background is identified
Value, then adds up the pixel value of described background and meets the number of pixels of the second scope set in advance and account for the total pixel of described prospect
Percentage, adjusts the second count of described second camera 50 according to parameter according to the result added up.Described second count is according to parameter bag
Include: aperture, shutter and speed etc..
When described percentage is less than described second percentage set in advance, illustrate that described second light exposure is not enough, i.e.
The light exposure of described background is not enough, and the destination object in shooting image out is partially dark, described adjusts institute based on adjusting module 102
State second count according to parameter to reduce described second light exposure.In the present embodiment, described adjusting module 102 can be by reducing light
Circle, or reduce shutter speed, or the minimizing time for exposure reduces speed and reduces described second light exposure etc..
When described percentage is greater than or equal to described second percentage set in advance, described second light exposure is being described just
Often, the light exposure of i.e. described background is normal, and the destination object brightness in shooting image out is suitable, described adjusting module 102
The second acquisition parameters of described second camera 50 need not be adjusted.
Described control mould 103, when receiving photographing instruction, controls described first camera 40 and claps destination object
Take the photograph and obtain the first image and control described second camera 50 carrying out shooting to described destination object and obtaining the second image.
In the present embodiment, after described control mould 103 gets the photographing instruction of user, described first camera 40 is controlled
Shoot described destination object with described second camera 50 respectively.Described photographing instruction can be combined by one or more of
Mode trigger: click on imaging icon, click on shoot button, Bluetooth transmission instruction, speech recognition (for example, " take pictures " password or
Person " OK " password etc.), gesture identification (for example, " V " gesture or " OK " gesture etc.), Expression Recognition (for example, smiling face etc.) etc..
Spend the time less so that shoot described destination object, described first camera 40 and described second camera
50 can be carried out for the shooting action shooting described destination object simultaneously.In other embodiments, described first camera 40
For shooting, the shooting action of described destination object also can asynchronous be carried out with described second camera 50, for example, and described first
Camera 40 preferentially shoots described destination object, and after Preset Time (for example, 1 second), described second camera 50 shoots again
Described destination object.
Described Fusion Module 104, for merging described first image and described second image, generates target figure
Picture.
In the present embodiment, described electronic equipment 1 is previously stored with Image Fusion, described Image Fusion bag
Include: based on non-multi-scale transform image interfusion method (such as average weighted method, based on PCA image interfusion method, based on
The image interfusion method etc. of modulation), (for example melt based on the image of pyramid transform based on the image interfusion method of multi-scale transform
Conjunction method, the fusion method based on wavelet transformation, the image interfusion method etc. based on warp wavelet).The present invention can use
Image Fusion is not limited to the above-mentioned method enumerated, and can also include that other existing or that be likely to occur from now on are suitable for
The method that image is merged.In addition, cited Image Fusion is prior art, the present invention does not solves one by one at this
Release.
In the present embodiment, described Fusion Module 104 can be the prospect cutting that will be shot by described first camera 40
Out out splice with the background cutting being shot by described second camera 50, if there is being both not belonging to prospect and do not belong to
In the part of background, then splice with this part again after above-mentioned splicing completes, obtain one and expose suitable image.Above-mentioned cutting side
Formula can be to extract pixel therein and corresponding position.
Further, in order to improve the quality of the target image after fusion, described target image visual effect is made more to manage
Thinking, in other embodiments, described Fusion Module 104 can be also used for: carries out pretreatment to described first image and obtains
One process image, carries out pretreatment to described second image and obtains the second process image；By described first process image and described
Second process image merges, and obtains target image.
In the present embodiment, carry out pretreatment to described first image and may include that in the described prospect of rejecting, pixel value is little
Pixel in the first preset value.Rejecting pixel value in described prospect is to protect further less than the pixel of described first preset value
Demonstrate,prove a small amount of in described prospect or extremely individual other appearance deficient exposure phenomenon pixel.Carry out pretreatment to described second image can wrap
Include: reject pixel value in described background and be more than the pixel of the second preset value.Reject pixel value in described background and be more than described second
The pixel of preset value is to be further ensured that a small amount of in described background or extremely individual other pixel overexposure phenomenon occur.
In other embodiments, carry out pretreatment to described first image and described second image can also include: image
Strengthen, noise eliminates.Described image enhaucament and noise eliminate and belong to prior art, do not do related description herein.
In sum, the imaging system 10 based on dual camera of the present invention is used for using dual camera (first takes the photograph
As 40 and second camera 50) destination object is shot, during shooting, described acquisition module 100 first obtains described first and takes the photograph
First light exposure of picture 40 and the second light exposure of described second camera 50, described adjusting module 102 is according to described first
Light exposure and described second light exposure adjust the first count of described first camera 40 respectively according to parameter and described second camera
The second count of 50 is according to parameter, and when receiving photographing instruction, described control module 103 controls described first camera 40 and described
Second camera 50 carries out shooting respectively and obtains the first image and the second image to the image comprising described destination object, and
Described first image and described second image are merged by described Fusion Module 104, generate target image.Can by the present invention
Effectively improve background overexposure under backlight scene or the dark situation of foreground subject, obtain full figure and expose image accurately, very
The good profile telling prospect and the degree of depth, can allow the effect at the bright place of prospect distinct, and the place of dark can retain more
Minutia, improves the details performance of image dark portion and highlights.
In several embodiments provided by the present invention, it should be understood that disclosed system, apparatus and method are permissible
Realize by another way.For example, device embodiment described above is only schematically, for example, and described module
Dividing, being only a kind of logic function and divide, actual can have other dividing mode when realizing.
The described module illustrating as separating component can be or may not be physically separate, shows as module
The parts showing can be or may not be physical location, i.e. may be located at a place, or also can be distributed to multiple
On NE.Some or all of module therein can be selected according to the actual needs to realize the mesh of the present embodiment scheme
's.
In addition, each functional module in each embodiment of the present invention can be integrated in a processing unit, it is also possible to
It is that unit is individually physically present, it is also possible to two or more unit are integrated in a unit.Above-mentioned integrated list
Unit both can use the form of hardware to realize, it would however also be possible to employ the form that hardware adds software function module realizes.
The above-mentioned integrated unit realizing with the form of software function module, can be stored in an embodied on computer readable and deposit
In storage media.Above-mentioned software function module is stored in a storage medium, including some instructions are with so that a computer
Equipment (can be personal computer, server, or the network equipment etc.) or processor (processor) perform the present invention each
The part steps of method described in embodiment.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of without departing substantially from the spirit or essential attributes of the present invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, all should regard embodiment as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit requires rather than described above limits, it is intended that all by fall in the implication of equivalency and scope of claim
Change is included in the present invention.Any attached associated diagram mark in claim should be considered as limiting involved right to want
Ask.Furthermore, it is to be understood that " an including " word is not excluded for other unit or step, odd number is not excluded for plural number.System claims is stated
Multiple unit or device also can be realized by software or hardware by a unit or device.The first, the second grade word
It is used for representing title, and be not offered as any specific order.
Finally it should be noted that above example only in order to technical scheme being described and unrestricted, although reference
The present invention has been described in detail by preferred embodiment, it will be understood by those within the art that, can be to the present invention's
Technical scheme is modified or equivalent, without deviating from the spirit and scope of technical solution of the present invention.
Claims (10)
1. the photographic method based on dual camera, is applied in electronic equipment, and the same side of described electronic equipment is pacified
Equipped with the first camera and second camera, it is characterised in that described method includes:
Obtain the first light exposure of described first camera and the second light exposure of described second camera；
The first count adjusting described first camera according to described first light exposure shines parameter, and according to described second light exposure
Adjust the second count of described second camera according to parameter；
When receiving photographing instruction, control described first camera and shooting is carried out to destination object obtain the first image and control
Make described second camera to carry out shooting to described destination object and obtain the second image；And
Described first image and described second image are merged, generates target image.
2. the photographic method based on dual camera as claimed in claim 1, it is characterised in that described first shooting of described acquisition
Second light exposure of the first light exposure of head and described second camera includes:
Using the algorithm of target detection prestoring to identify prospect from the image of described first camera capture, sensing is described
Light exposure on prospect image obtains described first light exposure；And
The algorithm of target detection prestoring described in employing identifies background from the image that described second camera captures, sensing
Light exposure on described background video obtains described second light exposure.
3. the photographic method based on dual camera as claimed in claim 2, it is characterised in that
The first count adjusting described first camera according to described first light exposure includes according to parameter:
Identify each pixel of described prospect the mean value calculating described foreground pixel；
The mean value of described foreground pixel and first threshold set in advance are compared；And
When described foreground pixel mean value less than described first threshold set in advance when, adjust described first count according to parameter with
Increasing described first light exposure, described first count includes aperture, shutter and speed according to parameter；
The second count adjusting described second camera according to described second light exposure includes according to parameter:
Identify each pixel of described background the mean value calculating described background pixel；
The mean value of described background pixel and Second Threshold set in advance are compared；And
When described background pixel mean value higher than described Second Threshold set in advance when, adjust described second count according to parameter with
Reducing described second light exposure, described second count includes aperture, shutter and speed according to parameter.
4. the photographic method based on dual camera as claimed in claim 2, it is characterised in that
The first count adjusting described first camera according to described first light exposure includes according to parameter:
Identify each pixel value of described prospect；
Add up the pixel value of described prospect to meet the number of pixels of the first scope set in advance and account for the hundred of the total pixel of described prospect
Proportion by subtraction；And
When described percentage is less than the first percentage set in advance, adjust described first count according to parameter to increase described first
Light exposure, described first count includes aperture, shutter and speed according to parameter；
The second count adjusting described second camera according to described second light exposure includes according to parameter:
Identify each pixel value of described background；
Add up the pixel value of described background to meet the number of pixels of the second scope set in advance and account for the hundred of the total pixel of described background
Proportion by subtraction；And
When described percentage is less than the second percentage set in advance, adjust described second count according to parameter to reduce described second
Light exposure, described first count includes aperture, shutter and speed according to parameter.
5. the photographic method based on dual camera as described in any one in claim 2 to 4, it is characterised in that described side
Method also includes:
Reject pixel value in described prospect and be less than the pixel of the first preset value；And/or
Reject pixel value in described background and be more than the pixel of the second preset value.
6. the camera system based on dual camera, is installed in electronic equipment, and the same side of described electronic equipment is pacified
Equipped with the first camera and second camera, it is characterised in that described system includes:
Acquisition module, for obtaining the first light exposure of described first camera and the second light exposure of described second camera；
Adjusting module, for adjusting the first count of described first camera according to described first light exposure according to parameter, and according to
Described second light exposure adjusts the second count of described second camera according to parameter；
Control module, for when receiving photographing instruction, controls described first camera and carries out shooting to destination object and obtain
First image and control described second camera and shooting is carried out to described destination object obtain the second image；And
Fusion Module, for merging described first image and described second image, generates target image.
7. the camera system based on dual camera as claimed in claim 6, it is characterised in that described acquisition module obtains described
Second light exposure of the first light exposure of the first camera and described second camera includes:
Using the algorithm of target detection prestoring to identify prospect from the image of described first camera capture, sensing is described
Light exposure on prospect image obtains described first light exposure；And
The algorithm of target detection prestoring described in employing identifies background from the image that described second camera captures, sensing
Light exposure on described background video obtains described second light exposure.
8. the camera system based on dual camera as claimed in claim 7, it is characterised in that
The first count that described adjusting module adjusts described first camera according to described first light exposure includes according to parameter:
Identify each pixel of described prospect the mean value calculating described foreground pixel；
The mean value of described foreground pixel and first threshold set in advance are compared；And
When described foreground pixel mean value less than described first threshold set in advance when, adjust described first count according to parameter with
Increasing described first light exposure, described first count includes aperture, shutter and speed according to parameter；
The second count that described adjusting module adjusts described second camera according to described second light exposure includes according to parameter:
Identify each pixel of described background the mean value calculating described background pixel；
The mean value of described background pixel and Second Threshold set in advance are compared；And
When described background pixel mean value higher than described Second Threshold set in advance when, adjust described second count according to parameter with
Reducing described second light exposure, described second count includes aperture, shutter and speed according to parameter.
9. the camera system based on dual camera as claimed in claim 7, it is characterised in that
The first count that described adjusting module adjusts described first camera according to described first light exposure includes according to parameter:
Identify each pixel value of described prospect；
Add up the pixel value of described prospect to meet the number of pixels of the first scope set in advance and account for the hundred of the total pixel of described prospect
Proportion by subtraction；And
When described percentage is less than the first percentage set in advance, adjust described first count according to parameter to increase described first
Light exposure, described first count includes aperture, shutter and speed according to parameter；
The second count that described adjusting module adjusts described second camera according to described second light exposure includes according to parameter:
Identify each pixel value of described background；
Add up the pixel value of described background to meet the number of pixels of the second scope set in advance and account for the hundred of the total pixel of described background
Proportion by subtraction；And
When described percentage is less than the second percentage set in advance, adjust described second count according to parameter to reduce described second
Light exposure, described first count includes aperture, shutter and speed according to parameter.
10. the camera system based on dual camera as described in any one in claim 7 to 9, it is characterised in that described melt
Compound module is additionally operable to:
Reject pixel value in described prospect and be less than the pixel of the first preset value；And/or
Reject pixel value in described background and be more than the pixel of the second preset value.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610619497.4A CN106161980A (en) | 2016-07-29 | 2016-07-29 | Photographic method and system based on dual camera |
| PCT/CN2016/103875 WO2018018771A1 (en) | 2016-07-29 | 2016-10-29 | Dual camera-based photography method and system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610619497.4A CN106161980A (en) | 2016-07-29 | 2016-07-29 | Photographic method and system based on dual camera |
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| CN106161980A true CN106161980A (en) | 2016-11-23 |
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| CN201610619497.4A Pending CN106161980A (en) | 2016-07-29 | 2016-07-29 | Photographic method and system based on dual camera |
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| WO (1) | WO2018018771A1 (en) |
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