CN106534633A - Combined photographing system, mobile terminal and image processing method - Google Patents
Combined photographing system, mobile terminal and image processing method Download PDFInfo
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- CN106534633A CN106534633A CN201610958484.XA CN201610958484A CN106534633A CN 106534633 A CN106534633 A CN 106534633A CN 201610958484 A CN201610958484 A CN 201610958484A CN 106534633 A CN106534633 A CN 106534633A
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- 230000000007 visual effect Effects 0.000 claims description 31
- 230000015572 biosynthetic process Effects 0.000 claims description 7
- 238000003786 synthesis reaction Methods 0.000 claims description 6
- 230000002194 synthesizing effect Effects 0.000 abstract 1
- 230000003287 optical effect Effects 0.000 description 23
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- 238000010586 diagram Methods 0.000 description 4
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- 206010034960 Photophobia Diseases 0.000 description 1
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- 230000009286 beneficial effect Effects 0.000 description 1
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Classifications
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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
- H04N23/90—Arrangement of cameras or camera modules, e.g. multiple cameras in TV studios or sports stadiums
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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
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
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Abstract
The invention discloses a combined photographing system, a mobile terminal and an image processing method. The combined photographing system comprises a first photographing device, a second photographing device, a laser projection device and a processor. The laser projection device is used for projecting a structured light pattern of invisible laser to a shared field of view of the first photographing device and the second photographing device. The first photographing device is used for collecting a first visible light color image in the shared field of view. The second photographing device is used for collecting a visible light gray image in the shared field of view. One of the first photographing device and the second photographing device is used for collecting an invisible light image in the shared field of view. The processor is used for synthesizing the first visible light color image and the visible light gray image into a second visible light color image and calculating a depth image through utilization of the invisible light image. According to the system, the mobile terminal and the method, the target high-quality color image and the depth image can be collected with a small size and lower power consumption.
Description
【Technical field】
The present invention relates to optical measurement and electronic applications, more particularly to a kind of combination shot system, mobile terminal and image
Processing method.
【Background technology】
RGB image is able to record that the color characteristic of object, has been widely used in terms of pattern recognition, such as people
Face identification, Articles detecting etc..Recently as the development of depth survey technology, the development of structured light technique is based particularly on, profit
Further carry out the applications such as motion sensing manipulation, 3D reconstructions, tracking and avoidance also gradually to obtain with depth camera Measuring Object depth information
To attention.
Color camera is equipped with the computing device and depth camera causes equipment to have more extensive function, but consider
To mobile device as, in mobile phone, the less computing device of flat board equal-volume, many cameras of setting are unadvisable, are on the one hand occupied
Substantial amounts of space;On the other hand also bring along bigger power consumption.
【The content of the invention】
In order to overcome the deficiencies in the prior art, the invention provides at a kind of combination shot system, mobile terminal and image
Reason method, realizes high-quality Color Image Acquisition and depth image collection with fewer resource.
A kind of combination shot system, including the first camera head, the second camera head, laser projection device and processor;
The laser projection device is used for, and the total visual field to first camera head and the second camera head projects not
The structured light patterns of visible laser;
First camera head is used for, and gathers the first otherwise visible light color image in the total visual field;
Second camera head is used for, and gathers the visible ray gray level image in the total visual field;
One of first camera head and the second camera head be additionally operable to gather in the total visual field can not
See light image;
The processor is used for, visible using first otherwise visible light color image and the synthesis second of visible ray gray level image
Light coloured image, and depth image is calculated using the black light image.
Preferably, the laser projection device is used for alternately projecting the structured light patterns and pass to the total visual field
Close the projection structured light patterns;
Gathering one of described black light image in first camera head and the second camera head is used for, described
Laser projection device gathers the first black light image during projecting the structured light patterns, closes in the laser projection device
The second black light image is gathered during projecting the structured light patterns;
The processor is used for, using the first black light image and the difference image meter of the second black light image
Calculate the depth image.
Preferably, project in the cycle of the structured light patterns in the laser projection device alternating projection and closing, throw
The duration of the structured light patterns is penetrated more than the duration for closing the projection structured light patterns.
Preferably, the focal length of lens of first camera head is different from the focal length of lens of second camera head.
Preferably, the invisible laser is infrared ray laser.
Preferably, the laser projection device is arranged between first camera head and the second camera head.
Present invention also offers a kind of mobile terminal, including described combination shot system.
Present invention also offers a kind of image acquiring method, comprises the steps:
Projection step:Laser projection device is invisible to the total visual field projection of the first camera head and the second camera head
The structured light patterns of laser;
First acquisition step:First camera head gathers the first otherwise visible light color image in the total visual field,
Second camera head gathers the visible ray gray level image in the total visual field;
Second acquisition step:One of first camera head and the second camera head also gather the total visual field
In black light image;
Process step:The processor utilizes first otherwise visible light color image and visible ray gray level image synthesis second
Otherwise visible light color image, and depth image is calculated using the black light image.
Preferably, in the projection step:
The laser projection device alternately projects the structured light patterns to the total visual field and closes described in projection
Structured light patterns;
In first acquisition step:
One of described black light image is gathered in first camera head and the second camera head, in the laser
Projection arrangement gathers the first black light image during projecting the structured light patterns, closes in the laser projection device and projects
The second black light image is gathered during the structured light patterns;
In the process step:
The processor utilizes the first black light image and the difference image of the second black light image to calculate institute
State depth image.
Preferably, project in the cycle of the structured light patterns in the laser projection device alternating projection and closing, throw
The duration of the structured light patterns is penetrated more than the duration for closing the projection structured light patterns.
The invention has the beneficial effects as follows:
Compared to prior art, the present invention can realize the high-quality colour to target with less volume, lower power consumption
The collection of image and depth image.
【Description of the drawings】
Fig. 1 is the combination shot system schematic of an embodiment of the present invention
Fig. 2 is the structural representation of the camera head of an embodiment of the present invention
Fig. 3 is the optical filter schematic diagram of first camera head of an embodiment of the present invention
Fig. 4 is the optical filter schematic diagram of the second camera head of another kind embodiment of the invention
Fig. 5 is the projection sequential chart of the laser projection device of an embodiment of the present invention
Fig. 6 is the mobile terminal schematic diagram of an embodiment of the present invention
【Specific embodiment】
Preferred embodiment to inventing is described in further detail below.
As shown in figure 1, a kind of combination shot system of embodiment, including the first camera head, the second camera head, laser
Projection arrangement and processor, processor are electrically connected with the first camera head, the second camera head and laser projection device respectively.
The laser projection device is used for, and the total visual field to first camera head and the second camera head projects not
The structured light patterns of visible laser;First camera head is used for, and gathers the first otherwise visible light color in the total visual field
Image, second camera head are used for, and gather the visible ray gray level image in the total visual field;First camera head
It is additionally operable to gather the black light image in the total visual field with one of the second camera head;The processor is used for,
Synthesize the second otherwise visible light color image using first otherwise visible light color image and visible ray gray level image, and using described
Black light image calculates depth image.
In Fig. 1, FOV represents the visual angle of the first camera head and the second camera head, the projection scope of laser projection device
Cover the total visual field of the first camera head and the second camera head.
As shown in Fig. 2 the typical structure schematic diagram of camera head, including imageing sensor 1, optical filter 2 and lens 3, light
Through lens 3 convergence again after optical filter 3 by imageing sensor gather.Optical filter 2 is for by the light of specific wavelength, figure
As sensor 1 is used for converting light to digital electric signal.
The Baeyer optical filter that common RGB camera is adopted, optical filter is with identical with image sensor pixel quantity and one
One corresponding filter unit, Baeyer optical filter have for respectively by the filter unit of HONGGUANG, green glow and blue light, light process
The pixel of imageing sensor corresponding with the filter unit is incided after certain filter unit.It is quicker to green glow in view of human eye
Sense, therefore be R (25%) generally by the ratio setting of three:G (50%):B (25%).
As shown in figure 3, in a kind of embodiment, the first camera head is used for gathering the first otherwise visible light color image and can not
See light image, the second camera head is only used for gathering visible ray gray level image.Such as the first camera head adopts RGB-IR cameras,
The optical filter which adopts is different from Baeyer optical filter, and the optical filter of the present embodiment is made up of four kinds of different filter units, respectively
R, G, B and infrared light (IR) component can be passed through, four ratio is R (25%):G (25%):B (25%):IR (25%),
By using this optical filter 2, the first camera head can both gather otherwise visible light color image, it is also possible to gather sightless red
Outer light image.It is of course also possible to use the filter unit of other black lights substitutes IR filter units, to coordinate laser projection to fill
Put other invisible laser of projection.The arrangement mode of each filter unit of the optical filter of the present embodiment and each component accounting are not
Uniquely, it is possibility to have other arrangements and distribution mode.
After imageing sensor in first camera head obtains the optical information of each component (such as R, G, B, IR), due to
Each optical information all only occupies the pixel of part, so that recovering other three kinds points in each pixel by way of interpolation
The intensity information of amount, so that finally realize synchronous acquisition RGB image and IR images.The method of interpolation has various, such as plus
Weight average etc., due to for prior art thus do not described in detail here.
The second camera head in the present embodiment is gray scale camera, and its optical filter is transparent, or does not have optical filter.
Due to not filtering the light of some wavelength, thus stronger optical signal can be collected, even if under gloomy environment
Also preferable image effect has been can guarantee that.
As shown in figure 4, in another embodiment, the first camera head is used only for gathering the first otherwise visible light color figure
Picture, the second camera head are used for gathering visible ray gray level image and black light image.Fig. 4 second is taken the photograph in a kind of embodiment
As the optical filter that device is adopted, wherein IR represent infrared filtering unit, W represents white light filter element i.e. transparent cell, Ke Yitong
Cross the light of any wavelength.
Laser projection device is different according to the structured light patterns of projection, and its structure is also different.The present embodiment is with speckle particle
Illustrate as a example by structured light patterns.Laser projection device is typically by light source, collimating lens and diffraction optical element (DOE) group
Into.In the present embodiment, light source is iraser, can be that single edge emitting LASER Light Source, or vertical-cavity surface-emitting swash
Optical arrays light source.As the light that LASER Light Source sends has certain angle of divergence so that using collimating lens collimated with
Launch the light beam of focal length.Laser beam is expanded into multiple laser Jing after DOE, and forms speckle particle pattern in space.
In much using scene, it is to gather image under the irradiation of the light sources such as sunlight, these light sources are usually contained
There is black light identical black light (such as infrared light) projected with laser projection device, the light note of this part is to collection
Black light image produce impact, particularly in the case of light source is more strong, the black light image for gathering can be caused
The unfavorable situation such as contrast is relatively low, noise is big.In one embodiment, it is spaced to total visual field by controlling laser projection device
Projection structure light pattern is eliminating this adverse effect.As shown in figure 5, being a kind of interval throwing of laser projection device of embodiment
Shadow sequential chart, such as closes laser projection device projection in the T1 time periods, and gathers corresponding black light pattern I1, and in phase
The adjacent T2 time periods open laser projection device projection, and gather corresponding black light pattern I2... by that analogy.When adjacent
Between section spacing frequency be not more than black light image frequency acquisition, you can once can not with only gathering in a period of time
See light image, it is also possible to gather multiple black light image.To illustrate how to below eliminate with frequency identical situation
The impact of black light image of the black light that light source is produced to gathering.
In the T1 time periods, laser projection device is closed, and the black light image I1 of acquisition is only comprising invisible in light source
Light composition.In the T2 time periods, the black light image I2 of acquisition black light then simultaneously comprising laser projection device projection into
Point and light source black light composition.A kind of processing method is, it is assumed that the illumination of two neighboring time period inner light source does not become
Change and collected object is not moved, now can be eliminated the effects of the act by infrared-difference:Differentiated black light figure
As I2 '=I2-I1, such black light image I2 ' has more high-contrast.In another kind of processing method, it is possible to use in front and back
At least two width black light images doing difference, such as:I2 '=I2- (I3+I1)/2.Concrete calculus of finite differences processing method also has many
Kind.
It is as laser projection device is to close within a period of time, therefore under conditions of frequency acquisition is constant, overall
The quantity of the black light image of acquisition is reduced, and causes certain impact to the follow-up depth image that calculates.In order to reduce this impact,
The length of the length more than projection shut-in time section of projection opening time section, in the switch periods of laser projection device, is set
(such as T2 is more than T1), obtain the collection frame number of higher black light image.
In one embodiment, a kind of image acquiring method, comprises the steps:
S1, laser projection device project invisible laser to the total visual field of the first camera head and the second camera head
Structured light patterns.
S2, first camera head gather the first otherwise visible light color image in the total visual field, and described second takes the photograph
As device gathers the visible ray gray level image in the total visual field.
One of S3, first camera head and second camera head also gather invisible in the total visual field
Light image.
S4, the processor utilize first otherwise visible light color image and visible ray gray level image synthesis high-quality the
Two otherwise visible light color images.
In the present embodiment, the first camera head is identical with the size and resolution of the image acquisition device of the second camera head, this
Sample visible ray gray level image and the first otherwise visible light color image only need to consider two image acquisition devices due to position in synthesis
The image registration problem that difference causes.The parameter of the first camera head and the second camera head can also in other embodiments
Differ.Image registration algorithm is known technology more ripe at present, is not elaborated here.Due to visible ray gray-scale maps
Seem not filter through optical filter and directly receive acquired in visible ray, thus its light sensitivitys is stronger, can with first by which
See that light coloured image carries out synthesis and can realize following effect:
Details strengthens.Under half-light environment, many details in the first otherwise visible light color image relatively will be obscured, now
It will be seen that after in light gray level image, the details of the part is synthesized with the first otherwise visible light color image, the second visible ray of formation
Coloured image will possess the image effect for becoming apparent from.
Image zoom.First camera head and the focal length of lens of the second camera head are set to different, are such as respectively
It is near burnt with remote Jiao.As the first otherwise visible light color image is obtained under remote focal length, thus the subject image in image nearby compares
It is fuzzy, and visible ray gray level image is obtained under nearly focal length mode, now with the information in visible ray gray level image mending
The part obscured in repaying the first otherwise visible light color image, ultimately forms the second relatively sharp otherwise visible light color image.
S5, the processor calculate depth image using the black light image.
May be constructed based on the trigon depth survey unit of structure light by the first camera head and laser projection device.Obtain
The principle for taking depth information is the black light image that will collect to be carried out matching primitives with the reference picture that accesses in system and obtains
Capture element deviation value, then just can be with using the one-to-one relationship of pixel deviation value and actual grade value by principle of triangulation
Obtain the depth image of object space.Here reference picture is by gathering in the plane of depth camera known depth value
Black light image and obtain.
As shown in fig. 6, a kind of mobile terminal 7 containing this combination shot system of embodiment, including processor, a shooting
Device 4, laser projection device 5 and the second camera head 6.First camera head 4, laser projection device 5 and the second camera head 6
Can be arranged on the same surface of mobile terminal, laser projection device 5 is preferably provided at the first camera head 4 and second and takes the photograph
As, between device 6, the first camera head 4, laser projection device 5 and the second camera head 6 are preferably provided on same straight line.
Processor etc. can be made up of one or more in the CPU in mobile terminal, application specific processor, microelectronic component etc..It is mobile
Terminal can be mobile phone, flat board, computer etc..
Above content is with reference to specific preferred implementation further description made for the present invention, it is impossible to assert
The present invention be embodied as be confined to these explanations.For general technical staff of the technical field of the invention,
On the premise of without departing from present inventive concept, some simple deduction or replace can also be made, should all be considered as belonging to the present invention by
The scope of patent protection that the claims submitted to determine.
Claims (10)
1. a kind of combination shot system, is characterized in that, including the first camera head, the second camera head, laser projection device and
Processor;
The laser projection device is used for, and the total visual field projection to first camera head and the second camera head is invisible
The structured light patterns of laser;
First camera head is used for, and gathers the first otherwise visible light color image in the total visual field;
Second camera head is used for, and gathers the visible ray gray level image in the total visual field;
One of first camera head and the second camera head are additionally operable to gather the black light in the total visual field
Image;
The processor is used for, and synthesizes the second visible brilliance using first otherwise visible light color image and visible ray gray level image
Color image, and depth image is calculated using the black light image.
2. combination shot system as claimed in claim 1, is characterized in that,
The laser projection device is used for alternately projecting the structured light patterns and closing to the total visual field projecting described
Structured light patterns;
Gathering one of described black light image in first camera head and the second camera head is used for, in the laser
Projection arrangement gathers the first black light image during projecting the structured light patterns, closes in the laser projection device and projects
The second black light image is gathered during the structured light patterns;
The processor is used for, and calculates institute using the difference image of the first black light image and the second black light image
State depth image.
3. combination shot system as claimed in claim 1, is characterized in that,
Within the cycle of the laser projection device alternating projection and the closing projection structured light patterns, the structure light is projected
The duration of pattern is more than the duration for closing the projection structured light patterns.
4. combination shot system as claimed in claim 1, is characterized in that,
The focal length of lens of first camera head is different from the focal length of lens of second camera head.
5. combination shot system as claimed in claim 1, is characterized in that,
The invisible laser is infrared ray laser.
6. combination shot system as claimed in claim 1, is characterized in that,
The laser projection device is arranged between first camera head and the second camera head.
7. a kind of mobile terminal, is characterized in that, including the combination shot system as described in claim 1-6 is arbitrary.
8. a kind of image acquiring method, is characterized in that, comprise the steps:
Projection step:Laser projection device projects invisible laser to the total visual field of the first camera head and the second camera head
Structured light patterns;
First acquisition step:First camera head gathers the first otherwise visible light color image in the total visual field, described
Second camera head gathers the visible ray gray level image in the total visual field;
Second acquisition step:One of first camera head and the second camera head are also gathered in the total visual field
Black light image;
Process step:The processor utilizes first otherwise visible light color image and the synthesis second of visible ray gray level image visible
Light coloured image, and depth image is calculated using the black light image.
9. image acquiring method as claimed in claim 8, is characterized in that,
In the projection step:
The laser projection device alternately projects the structured light patterns to the total visual field and closes the projection structure
Light pattern;
In first acquisition step:
One of described black light image is gathered in first camera head and the second camera head, in the laser projection
Device gathers the first black light image during projecting the structured light patterns, closes projection in the laser projection device described
The second black light image is gathered during structured light patterns;
In the process step:
The processor utilizes the first black light image and the difference image of the second black light image to calculate the depth
Degree image.
10. image acquiring method as claimed in claim 9, is characterized in that,
Within the cycle of the laser projection device alternating projection and the closing projection structured light patterns, the structure light is projected
The duration of pattern is more than the duration for closing the projection structured light patterns.
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JP2022538947A (en) * | 2020-05-27 | 2022-09-07 | 北京小米移動軟件有限公司南京分公司 | Image processing method and apparatus, camera assembly, electronic device, storage medium |
KR102458470B1 (en) * | 2020-05-27 | 2022-10-25 | 베이징 샤오미 모바일 소프트웨어 컴퍼니 리미티드 난징 브랜치. | Image processing method and apparatus, camera component, electronic device, storage medium |
JP7321187B2 (en) | 2020-05-27 | 2023-08-04 | 北京小米移動軟件有限公司南京分公司 | Image processing method and apparatus, camera assembly, electronic device, storage medium |
CN114073063B (en) * | 2020-05-27 | 2024-02-13 | 北京小米移动软件有限公司南京分公司 | Image processing method and device, camera assembly, electronic equipment and storage medium |
CN114284306A (en) * | 2021-12-15 | 2022-04-05 | 武汉新芯集成电路制造有限公司 | Depth and image sensor device, manufacturing method thereof and depth and image sensor chip |
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