CN109738967A - A kind of sky imaging inhibits the implementation method of strong bright spot - Google Patents
A kind of sky imaging inhibits the implementation method of strong bright spot Download PDFInfo
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- CN109738967A CN109738967A CN201910042475.XA CN201910042475A CN109738967A CN 109738967 A CN109738967 A CN 109738967A CN 201910042475 A CN201910042475 A CN 201910042475A CN 109738967 A CN109738967 A CN 109738967A
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Abstract
The present invention relates to the implementation method that a kind of imaging of sky inhibits strong bright spot, setting liquid crystal display, imaging sensor chip and system controller are close to place liquid crystal display in the imaging surface of imaging sensor chip；Establish the corresponding relationship between the pixel of liquid crystal display and sensor chip pixel；Using system controller, control liquid crystal display operation is highest transmitance, and imaging sensor chip is made to take photo, determines whether strong bright spot by photo；If there is, using system controller, control liquid crystal display operation is minimum transmitance, the coordinate of strong bright spot pixel in imaging sensor chip is obtained by new photo, control the pixel in liquid crystal display in sensor chip above strong light spot pixel, it realizes that minimum transmitance, other positions keep highest transmitance, realizes and inhibit to go strong bright spot.The present invention has the advantages that light, accurate, the effective imaging area of sky is more complete.
Description
Technical field
The invention belongs to meteorological observation fields, and in particular to a kind of sky imaging inhibits the implementation method of strong bright spot, can
Applied to various sky imaging systems.
Background technique
Sky imager can be by observing sky automated imaging the cloud amount and cloud form of sky medium cloud on daytime.But
It is that, when the sun enters visual field, Qiang Guangliang spot frequently can lead to imaging sensor and generate blooming, it could even be possible to directly damaging
Evil imaging sensor.Also, when blooming sky the blooming area of very large area is had at image, so as to cause cloud amount
Calculating with cloud form is inaccurate.
There is the sky imager of some specific uses, they are designed to be used as the meteor or airglow of observation sky.These
The gain of the imaging sensor of instrument is very high, very sensitive.If full moon enters visual field, moonlight speck also results in sensitive
Sensor generates blooming.When imager tilts to some angle in use, nearby the accent light of high building may also can enter
Sensor generates strong bright spot.
General solution is all the running track for calculating the sun or the moon, places and computerizeds control above camera lens
Removable metal shelter, strong bright spot is blocked with the movement of the sun/moon.Therefore, it is had in the picture of imaging
The imaging of metal shelter, the calculating for cloud amount or cloud form introduce inaccuracy.In addition, this method need to use machine driving
System increases so as to cause the volume of instrument, needs relatively high power, installation and debugging are also inconvenient.As for high building light, because this
It is that designer can not estimate positioning in advance, this scheme is also insurmountable at this time.
Summary of the invention
In order to solve the above-mentioned technical problems, the present invention provides the implementation methods that a kind of imaging of sky inhibits strong bright spot.
The present invention provides a kind of implementation method of strong bright spot of sky imaging inhibition, and setting liquid crystal display 2, imaging sense
Device chip 3 and system controller 4, liquid crystal display 2, imaging sensor chip 3 are separately connected system controller 4, liquid crystal display
Device 2 is set between the camera lens 1 of sky imager and imaging sensor chip 3,
Execute following steps,
Step 1, it is close to place liquid crystal display 2 in the imaging surface of imaging sensor chip 3；
Step 2, make liquid crystal display 2 that imaging sensor chip 3 be completely covered；
Step 3, the corresponding relationship between 3 pixel of pixel and sensor chip of liquid crystal display 2 is established；
Step 4, using system controller 4, controlling the work of liquid crystal display 2 is highest transmitance, makes imaging sensor core
Piece 3 takes photo, determines whether strong bright spot by photo；
Step 5, if without strong bright spot, sky imager is worked normally；
Step 6, if there is strong bright spot, using system controller 4, controlling the work of liquid crystal display 2 is minimum transmitance,
So that imaging sensor chip 3 is taken photo, the seat of strong bright spot pixel in imaging sensor chip 3 is obtained by new photo
Mark；
Step 7, it using system controller 4, controls in liquid crystal display 2 in sensor chip 3 on strong light spot pixel
The pixel of side realizes that minimum transmitance, other positions keep highest transmitance, realizes and inhibits to go strong bright spot.
Moreover, step 3, establishes the corresponding relationship realization side between 3 pixel of pixel and sensor chip of liquid crystal display 2
Formula is,
1) uniform light of adjustable light intensity is allowed, the incidence camera lens 1 in a manner of low intensive；
2) it is gradually increased light intensity, is saturated the part pixel of imaging sensor chip 3, i.e., its output valve is 0xFF；
3) it is set as having M row N column pixel as the matrix of picture elements of sensor chip 3, the record imaging each pixel of sensor chip 3
Output value set be P={ A11... ..., Amn... ..., AMN, wherein AmnRepresent 3 m row the n-th column picture of imaging sensor chip
The output valve of member, m=1,2 ... M, n=1,2 ... N；
4) each pixel (m, n) of imaging sensor chip 3 is done as follows one by one:
It is minimum for reducing the transmitance of the pixel (p, q) of liquid crystal display 2 one by one, and records imaging sensor chip 3
The output valve B of pixelmn, and and AmnComparison, works as BmnLess than AmnWhen, that is, show the pixel (p, q) of liquid crystal display 2 at
As there are corresponding relationships for the pixel (m, n) of sensor chip 3.
Moreover, 2 thickness of liquid crystal display≤2mm.
Moreover, liquid crystal display 2 is in lambda1-wavelength 450-700nm, highest transmitance >=15%.
Moreover, 2 work area of liquid crystal display is greater than 3 work area of sensor chip.
Moreover, sensor chip 3 is CCD.
Alternatively, sensor chip 3 is CMOS.
Alternatively, sensor chip 3 is image amplifier.
Sky imaging of the invention inhibits the implementation method of strong bright spot to have light, accurate, the effective imaging area of sky
More complete advantage, and cost of implementation is low, has important promotional value.The present invention also provides simply and easily liquid crystals
Show that the corresponding relationship between the pixel of device and sensor chip pixel establishes scheme, can guarantee accurately to inhibit strong bright spot.
Detailed description of the invention
Fig. 1 is the sky imager imaging system structural schematic diagram of the embodiment of the present invention；
Fig. 2 is the signal Chong Die with the pixel of imaging sensor chip 3 of the pixel of the liquid crystal display 2 of the embodiment of the present invention
Figure；
Fig. 3 is the imaging signal of the sky containing strong bright spot and its blooming part before the embodiment of the present invention is realized
Figure；
Fig. 4 is the imaging schematic diagram of the sky of suppressed rear strong bright spot after the embodiment of the present invention is adjusted.
Wherein, 1- camera lens, 2- liquid crystal display, 3- imaging sensor chip, 4- system controller, 5- imaging sensor core
The pixel of piece 3, the pixel of 6- liquid crystal display 2,7- bright spot by force, the bright spot blooming part by force 8-, the imaging of 9- sky,
Strong bright spot after 10- is suppressed.
Specific embodiment
By the following examples, and in conjunction with attached drawing, inhibit the implementation method of strong bright spot to a kind of present invention sky imaging
It is further described in detail.
Embodiment 1
Fig. 1 is sky imager imaging system structural schematic diagram of the invention, for aiding in illustrating realization step of the invention
Rapid 1.
Fig. 2 is the pixel schematic diagram Chong Die with the pixel of imaging sensor chip 3 of liquid crystal display 2 of the invention, is used to
Aid in illustrating realization step 2 and step 3 of the invention.
Fig. 3 is the imaging schematic diagram of the sky containing strong bright spot and its blooming part before the present invention realizes, is used to
Aid in illustrating realization step 4 of the invention, step 5 and step 6.
Fig. 4 is the imaging schematic diagram of the sky of suppressed rear strong bright spot after adjusting, for aiding in illustrating reality of the invention
Existing step 7.
During realization of the invention, camera lens 1 is intended only as aiding in illustrating the device of sky imager in schematic diagram, and
It is not included in the present invention.Referring to Fig. 1, liquid crystal display 2, imaging sensor chip 3 and system controller is arranged in the present invention
4, liquid crystal display 2, imaging sensor chip 3 are separately connected system controller 4, and liquid crystal display 2 is set to camera lens 1 and imaging
Between sensor chip 3.
Liquid crystal display 2 has thin, heat-insulated good, the high feature of transmitance.Preferably, transmitance: thickness≤2mm is entering
When penetrating optical wavelength 450-700nm, highest transmitance >=15%.
2 work area of liquid crystal display is greater than 3 work area of imaging sensor chip.
The imaging sensor chip 3 can be CCD or CMOS or image amplifier.In embodiment 1, imaging sensing
Device chip 3 is CCD.
System controller 4 can control liquid crystal display and sensor chip simultaneously, have image-capable.Specifically
Ground, system controller 4 have the ability of control liquid crystal display 2, and the ability that control imaging sensor chip 3 is imaged is parsed into
As sensor chip 3 at photo ability.When it is implemented, system controller 4 can using independent computer system or
The embedded chips such as person's single-chip microcontroller are realized, for example, by using digital signal processor DSP, Complex Programmable Logic Devices FPGA or micro-
Controller MCU.
A kind of implementation method of the strong light hot spot of sky imaging inhibition includes the following steps:
Step 1, it is close to place liquid crystal display 2 in the imaging surface of imaging sensor chip 3；
Step 2, make liquid crystal display 2 that imaging sensor chip 3 be completely covered；
Step 3, the corresponding relationship between the pixel 6 of liquid crystal display 2 and the pixel 5 of imaging sensor chip 3 is established；
Present invention further propose that the implementation for establishing corresponding relationship is as follows:
2 transmitance of liquid crystal display is opened as maximum；
1) uniform light of adjustable light intensity is allowed, the incidence camera lens 1 in a manner of low intensive；
2) it is gradually increased light intensity, is saturated the part pixel of imaging sensor chip 3, i.e., its output valve is 0xFF；
3) it is set as having M row N column pixel as the matrix of picture elements of sensor chip 3, the record imaging each pixel of sensor chip 3
Output value set be P={ A11... ..., Amn... ..., AMN, wherein AmnRepresent 3 m row the n-th column picture of imaging sensor chip
The output valve of member, m=1,2 ... M, n=1,2 ... N；
4) each pixel (m, n) of imaging sensor chip 3 is done as follows one by one:
It is minimum for reducing the transmitance of the pixel (p, q) of liquid crystal display 2 one by one, and records imaging sensor chip 3
The output valve B of pixelmn, and and AmnComparison, works as BmnLess than AmnWhen, that is, show the pixel (p, q) of liquid crystal display 2 at
As there are corresponding relationships for the pixel (m, n) of sensor chip 3；
As shown in Fig. 2, corresponding relationship is not necessarily correspondingly.1 pixel of possible imaging sensor chip 3 is corresponding
1 pixel of liquid crystal display 2 perhaps 2 pixels or 4 pixels.
Step 4, using system controller 4, controlling the work of liquid crystal display 2 is highest transmitance, makes imaging sensor core
Piece 3 takes photo, and system controller 4 determines whether strong bright spot by photo, and 5 are entered step if not, if there is if
Enter step 6；
For example, generating solar facula phenomenon when the sun enters visual field, strong light frequently can lead to imaging sensor bloom and overflow
Out, while there are strong bright spot 7 in imaging 9 on high, strong bright spot blooming part 8 can be generated.When it is implemented, one
As when the value for having pixel in picture is 0xFF, that is, think to be saturated herein, i.e., have strong bright spot phenomenon in photo.
Step 5, if without strong bright spot, sky imager is worked normally, and process terminates；
Step 6, if there is strong bright spot, using system controller 4, controlling the work of liquid crystal display 2 is minimum transmitance,
So that imaging sensor chip 3 is taken photo, the seat of strong bright spot pixel in imaging sensor chip 3 is obtained by new photo
Mark；
When the work of liquid crystal display 2 is low transmission, worked before as the strong bright spot portion generated when highest transmitance
Branch is unsaturated, and blooming part also accordingly disappears.In this way it may determine that strong light spot where.Step 4 before such as
It is all 0xFF that strong light spot and strong light, which overflow part pixel value, in captured photo, this step is under low transmission, Qiang Guangliang spot
For example 0x8f is partially changed into, and strong light spilling portion before is divided into 0x4f, and strong light can be accurately positioned according to the value of photograph pixel
The coordinate of spot pixel in imaging sensor chip 3.
Step 7, using system controller 4, the strong light spot picture in imaging sensor chip 3 is controlled in liquid crystal display 2
The pixel of first top, realizes minimum transmitance, and the pixel of other positions keeps highest transmitance in liquid crystal display 2.
According to strong bright the spot coordinate of pixel and step 3 gained liquid crystal in imaging sensor chip 3 obtained by step 6
Corresponding relationship between the pixel 6 of display 2 and the pixel 5 of imaging sensor chip 3, in available liquid crystal display 2
Location of pixels in imaging sensor chip 3 above strong light spot pixel.Referring to Fig. 3 and Fig. 4, to strong light hot spot portion using most
Strong bright spot 10 after low transmission, after being suppressed in new sky imaging.
When it is implemented, software technology, which can be used, realizes automatic running process.
Embodiment 2
The present embodiment is substantially the same manner as Example 1, is a difference in that: imaging sensor chip 3 uses CMOS chip.
Embodiment 3
The present embodiment is substantially the same manner as Example 1, is a difference in that: imaging sensor chip 3 uses image amplifier.
Specific embodiment described herein is only an example for the spirit of the invention.The neck of technology belonging to the present invention
The technical staff in domain can do various modifications or supplement or is substituted in a similar manner to described specific embodiment, but simultaneously
Spirit or beyond the scope defined by the appended claims of the invention is not deviated by.
Claims (8)
1. the implementation method that a kind of sky imaging inhibits strong bright spot, it is characterised in that: setting liquid crystal display (2), imaging pass
Sensor chip (3) and system controller (4), liquid crystal display (2), imaging sensor chip (3) are separately connected system controller
(4), liquid crystal display (2) is set between the camera lens (1) of sky imager and imaging sensor chip (3),
Execute following steps,
Step 1, it is close to place liquid crystal display (2) in the imaging surface of imaging sensor chip (3)；
Step 2, make liquid crystal display (2) that imaging sensor chip (3) be completely covered；
Step 3, the corresponding relationship between the pixel of liquid crystal display (2) and sensor chip (3) pixel is established；
Step 4, using system controller (4), controlling liquid crystal display (2) work is highest transmitance, makes imaging sensor core
Piece (3) takes photo, determines whether strong bright spot by photo；
Step 5, if without strong bright spot, sky imager is worked normally；
Step 6, if there is strong bright spot, using system controller (4), controlling liquid crystal display (2) work is minimum transmitance,
So that imaging sensor chip (3) is taken photo, strong bright spot pixel in imaging sensor chip (3) is obtained by new photo
Coordinate；
Step 7, using system controller (4), the strong light spot pixel in sensor chip (3) is controlled in liquid crystal display (2)
The pixel of top realizes that minimum transmitance, other positions keep highest transmitance, realizes and inhibits to go strong bright spot.
2. inhibiting the implementation method of strong bright spot according to the imaging of sky described in claims 1, it is characterised in that: step 3, establish
Corresponding relationship implementation between the pixel and sensor chip (3) pixel of liquid crystal display (2) is,
1) uniform light of adjustable light intensity is allowed, incidence camera lens (1) in a manner of low intensive；
2) it is gradually increased light intensity, is saturated the part pixel of imaging sensor chip (3), i.e., its output valve is 0xFF；
3) it is set as having M row N column pixel as the matrix of picture elements of sensor chip (3), record imaging sensor chip (3) each pixel
Output value set be P={ A11... ..., Amn... ..., AMN, wherein AmnRepresent (3) m row n-th of imaging sensor chip column
The output valve of pixel, m=1,2 ... M, n=1,2 ... N；
4) each pixel (m, n) of imaging sensor chip (3) is done as follows one by one:
It is minimum for reducing the transmitance of the pixel (p, q) of liquid crystal display (2) one by one, and records imaging sensor chip (3)
The output valve B of pixelmn, and and AmnComparison, works as BmnLess than AmnWhen, that is, show that the pixel (p, q) of liquid crystal display (2) is right
There are corresponding relationships for the pixel (m, n) of imaging sensor chip (3).
3. inhibiting the implementation method of strong bright spot according to the sky imaging of claims 1 or 2, it is characterised in that: liquid crystal
Show device (2) thickness≤2mm.
4. inhibiting the implementation method of strong bright spot according to the sky imaging of claims 1 or 2, it is characterised in that: liquid crystal
Show device (2) in lambda1-wavelength 450-700nm, highest transmitance >=15%.
5. inhibiting the implementation method of strong bright spot according to the sky imaging of claims 1 or 2, it is characterised in that: liquid crystal
Show that device (2) work area is greater than sensor chip (3) work area.
6. inhibiting the implementation method of strong bright spot according to the sky imaging of claims 1 or 2, it is characterised in that: sensor
Chip (3) is CCD.
7. inhibiting the implementation method of strong bright spot according to the sky imaging of claims 1 or 2, it is characterised in that: sensor
Chip (3) is CMOS.
8. inhibiting the implementation method of strong bright spot according to the sky imaging of claims 1 or 2, it is characterised in that: sensor
Chip (3) is image amplifier.
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| CN107786785A (en) * | 2016-08-29 | 2018-03-09 | 华为技术有限公司 | Photo-irradiation treatment method and device |
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Application publication date: 20190510 |