CN105635527B - The system and method for target clear image is obtained under the conditions of a kind of rain and fog weather - Google Patents
The system and method for target clear image is obtained under the conditions of a kind of rain and fog weather Download PDFInfo
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- CN105635527B CN105635527B CN201610038796.9A CN201610038796A CN105635527B CN 105635527 B CN105635527 B CN 105635527B CN 201610038796 A CN201610038796 A CN 201610038796A CN 105635527 B CN105635527 B CN 105635527B
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- image
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- protective cover
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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
- H04N23/51—Housings
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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
- H04N23/80—Camera processing pipelines; Components thereof
- H04N23/81—Camera processing pipelines; Components thereof for suppressing or minimising disturbance in the image signal generation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
- H04N7/183—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a single remote source
Abstract
The invention discloses the systems that target clear image is obtained under the conditions of a kind of rain and fog weather comprising:Image collecting device acquires image;Lens protective cover, it is covered on the outside of the camera lens of described image harvester, the inside of the lens protective cover is equipped with interdigital transducer, and the interdigital transducer converts electrical energy into surface acoustic wave, to drive the water droplet being dropped on the outside of lens protective cover to be moved downward along lens protective cover;Image processing apparatus is connect with described image harvester, is handled with the image to image acquisition device;Image monitor is connect with described image processing unit, to receive the image that image processing apparatus processing is completed.The system can obtain the clear image of target under the conditions of rain and fog weather, to improve the picture quality and reliability of image monitoring.Correspondingly, the invention also discloses a kind of methods that target clear image is obtained under the conditions of rain and fog weather.
Description
Technical field
Under the conditions of a kind of system and method obtaining target clear image more particularly to a kind of rain and fog weather
Obtain the system and method for target clear image.
Background technology
Image monitoring is applied in many fields at present, such as power equipment image monitoring, uses image processing techniques
Working efficiency is greatly improved, and has ensured personal safety.However, under the conditions of rain and fog weather, the target image mould of acquisition
Paste it is unclear, contrast reduce, bring very big difficulty to monitoring.
In traditional solution, a set of general algorithm is difficult to find that in the technical field based on pure image procossing,
There are larger limitations for its application range, and the image restoration technology algorithm based on misty rain physical model is complicated, takes longer.
Invention content
An object of the present invention is to provide the system that target clear image is obtained under the conditions of a kind of rain and fog weather, the system
The clear image that target can be obtained under the conditions of rain and fog weather, to improve the picture quality and reliability of image monitoring.
It is a further object of the present invention to provide a kind of method that target clear image is obtained under the conditions of rain and fog weather, this method
The clear image that target can be obtained under the conditions of rain and fog weather, to improve the picture quality and reliability of image monitoring.
According to foregoing invention purpose, the present invention propose obtain target clear image under the conditions of a kind of rain and fog weather be
System comprising:
Image collecting device acquires image;
Lens protective cover covers on the outside of the camera lens of described image harvester, is set on the inside of the lens protective cover
There are interdigital transducer, the interdigital transducer to convert electrical energy into surface acoustic wave, is dropped on the outside of lens protective cover with driving
Water droplet is moved downward along lens protective cover;
Image processing apparatus is connect with described image harvester, to be carried out to the image of image acquisition device
Processing;
Image monitor is connect with described image processing unit, to receive the figure that image processing apparatus processing is completed
Picture.
The system that target clear image is obtained under the conditions of rain and fog weather of the present invention, by equipped with interdigital transducer
Lens protective cover removes the water droplet adhered in daylighting channel on the outside of the camera lens of image collecting device, to eliminate water droplet to camera lens
The influence of daylighting is handled the image of image acquisition device by image processing apparatus, which is typically to be directed to
Influence of the misty rain to camera lens daylighting and the algorithm process carried out, are transferred to image monitor later.The system is by being equipped with fork
The combination of the lens protective cover and image processing apparatus of finger transducer solves the limitation and complexity of traditional solution
Problem can obtain the clear image of target, to improve the picture quality and reliability of image monitoring under the conditions of rain and fog weather.
In the system for obtaining target clear image under the conditions of rain and fog weather of the present invention, the master of the lens protective cover
Act on is that water droplet is avoided to pollute camera lens;The main function of the interdigital transducer is to convert electrical energy into surface acoustic wave,
To drive the water droplet being dropped on the outside of lens protective cover to move downward, to achieve the effect that clean on the outside of lens protective cover, to the greatest extent
Amount reduces the influence of water droplet or other sundries to camera lens daylighting.
Further, in the system that target clear image is obtained under the conditions of rain and fog weather of the present invention, described image
Processing unit receive image acquisition device for same target different time T width images, described image processing dress
It sets T width image superpositions, the value for obtaining each pixel isWherein, Nt(x, y) indicates serial number t
Image in each pixel misty rain component, StThe target component of each pixel, t tables in the image of (x, y) expression serial number t
The serial number of diagram picture, related to time domain, (x, y) is the coordinate of pixel, related to spatial domain;Then image processing apparatus is to institute
There is pixel to average in the time domain, obtain single width mean value image, the value of each pixel is N in the single width mean value image0+S0
(x, y), wherein N0Approximately it is equal toS0(x, y) is equal toImage processing apparatus filters out
N in single width mean value image0, obtain only including target component S0The image of (x, y) is then transferred to described image monitoring device.
In said program, described image processing unit through the above way to the image of image acquisition device at
Reason, to filter out influence of the misty rain to image, obtains further clearly target image, principle is:Image collecting device first
Same target is obtained in the T width images of different time, acquisition of typically in extremely rapid succession taking pictures within certain period, the T width
The value of each pixel includes misty rain component N in imaget(x, y) and target component St(x, y), wherein t indicate the sequence of image
Number, related to time domain, (x, y) is the coordinate of pixel, related to spatial domain.Since misty rain has time domain dynamic, the T width figure
Value of the same pixel in different moments has time domain random distribution nature, the misty rain component N as int(x, y) is to interfere
Target component StThe ambient noise of (x, y).It is by the value that the T width image superposition obtains each pixel
After the T width image superposition, the misty rain component of each pixel tends to be identical, i.e.,It is approximately one normal
Number, is denoted as TN0.Since target usually has stationary characteristic, the pixel of same coordinate has equivalent mesh in the T width image
Component is marked, S is denoted as0(x, y), then target component value of the pixel of same coordinate after the T width image superposition is TS0(x,
y).All pixels point under the T width image superposition is averaged to obtain single width mean value image in the time domain, then the single width mean value figure
The value of each pixel is N as in0+S0(x,y).In the single width mean value image, misty rain component N0Zero-frequency point is shown as on spatial domain
Amount, is filtered out by pure image processing techniques, obtains only including target component S0The image of (x, y).
Further, in the system that target clear image is obtained under the conditions of above-mentioned rain and fog weather, described image processing dress
It only includes target component S by described in set and also use histogram equalization algorithm0The image of (x, y) is further processed, with enhancing
Described image monitoring device is transferred to after picture contrast.
Further, in the system that target clear image is obtained under the conditions of rain and fog weather of the present invention or above-mentioned, institute
It states image collector and is set to CCD (charge coupling device) imaging sensor.
Further, in the system that target clear image is obtained under the conditions of rain and fog weather of the present invention, described image
It is connected by optical fiber between processing unit and image monitor, to transmit image information by optical fiber, to avoid electromagnetism dry
It disturbs.
Correspondingly, the invention also provides a kind of methods that target clear image is obtained under the conditions of rain and fog weather comprising:
Lens protective cover is set on the outside of the camera lens of image collecting device, and the inside of the lens protective cover is equipped with interdigital change
Can device, the interdigital transducer converts electrical energy into surface acoustic wave, with driving be dropped in the water droplet on the outside of lens protective cover along
Lens protective cover moves downward;
Acquire target image and processing target image;
Treated target image is transferred out.
The method that target clear image is obtained under the conditions of rain and fog weather of the present invention, by equipped with interdigital transducer
Lens protective cover removes the water droplet adhered in daylighting channel on the outside of the camera lens of image collecting device, to eliminate water droplet to camera lens
The influence of daylighting, and the image of acquisition is handled, which is typically the influence for misty rain to camera lens daylighting and carries out
Algorithm process, treated target image is transferred out later.This method passes through mirror of the installation with interdigital transducer
The combination of head protective cover and image procossing, solves the problems, such as the limitation of traditional solution and complexity, can be in misty rain day
The clear image that target is obtained under the conditions of gas, to improve the picture quality and reliability of image monitoring.
In the method for obtaining target clear image under the conditions of rain and fog weather of the present invention, the master of the lens protective cover
Act on is that water droplet is avoided to pollute camera lens;The main function of the interdigital transducer is to convert electrical energy into surface acoustic wave,
To drive the water droplet being dropped on the outside of lens protective cover to move downward, to achieve the effect that clean on the outside of lens protective cover, to the greatest extent
Amount reduces the influence of water droplet or other sundries to camera lens daylighting.
Further, in the method that target clear image is obtained under the conditions of rain and fog weather of the present invention, target is acquired
Image and the step of processing target image includes:
(1) Quick Acquisition T width images continuous to same target;
(2) by T width image superpositions, the value for obtaining each pixel isWherein, Nt(x, y) table
Show the misty rain component of each pixel in the image of serial number t, StThe mesh of each pixel in the image of (x, y) expression serial number t
Component is marked, t indicates the serial number of image, related to time domain, and (x, y) is the coordinate of pixel, related to spatial domain;
(3) it averages in the time domain to all pixels point, obtains single width mean value image, each picture in the single width mean value image
The value of vegetarian refreshments is N0+S0(x, y), wherein N0Approximately it is equal toS0(x, y) is equal to
(4) N in single width mean value image is filtered out0, obtain only including target component S0The image of (x, y).
In said program, target image and processing target image are acquired through the above steps, to filter out misty rain to image
It influences, obtains further clearly target image, the principle that principle is handled image with above-mentioned image processing apparatus
Identical, details are not described herein again.
Further, the method for target clear image being obtained under the conditions of above-mentioned rain and fog weather further includes step (5):Using
Histogram equalization algorithm only includes target component S by described in0The image of (x, y) is further processed, to enhance image comparison
Degree.
Preferably, it in the method that target clear image is obtained under the conditions of above-mentioned rain and fog weather, is used in the step (1)
Ccd image sensor Quick Acquisition T width images continuous to same target.
It further, will in the method that target clear image is obtained under the conditions of rain and fog weather of the present invention or above-mentioned
Treated target image is transferred to image monitor.
The system that target clear image is obtained under the conditions of rain and fog weather of the present invention, compared with traditional solution
The advantages of include:
(1) achieve the effect that clean on the outside of lens protective cover with being used in combination for interdigital transducer by lens protective cover,
Its is simple in structure, at low cost, and safety, stability is good, no mechanical wear;
(2) being used in combination by lens protective cover with interdigital transducer and image processing apparatus so that at image
The mode for managing device processing image is simple and practicable, solves the problems, such as the limitation of traditional solution and complexity, can be in rain
The clear image that target is obtained under mist weather condition, to improve the picture quality and reliability of image monitoring.
The method that target clear image is obtained under the conditions of rain and fog weather of the present invention, compared with traditional solution
The advantages of include:
(1) achieve the effect that clean on the outside of lens protective cover with being used in combination for interdigital transducer by lens protective cover,
Its is simple in structure, at low cost, and safety, stability is good, no mechanical wear;
(2) made by achieving the effect that clean the combination of aforesaid way and image processing step on the outside of lens protective cover
With so that the method for handling image is simple and practicable, solves the problems, such as the limitation of traditional solution and complexity, can be in rain
The clear image that target is obtained under mist weather condition, to improve the picture quality and reliability of image monitoring.
Description of the drawings
Fig. 1 be rain and fog weather of the present invention under the conditions of obtain target clear image system under a kind of embodiment
Structural schematic block diagram.
Fig. 2 be rain and fog weather of the present invention under the conditions of obtain target clear image system under a kind of embodiment
Lens protective cover structural schematic diagram.
Fig. 3 be rain and fog weather of the present invention under the conditions of obtain target clear image method under a kind of embodiment
Flow chart.
Specific implementation mode
Below in conjunction with Figure of description and specific embodiment to obtaining mesh under the conditions of rain and fog weather of the present invention
The system and method for mark clear image is described in further detail.
Fig. 1 illustrates to obtain the structure of the system of target clear image, Fig. 2 signals under the conditions of the rain and fog weather of the present embodiment
The structure of the lens protective cover of the system of target clear image is obtained under the conditions of the rain and fog weather of the present embodiment, Fig. 3 is illustrated
The flow chart of the method for target clear image is obtained under the conditions of the rain and fog weather of the present embodiment.
As shown in Figure 1, the system that target clear image is obtained under the conditions of the rain and fog weather of the present embodiment, for being set with electric power
It is standby to carry out Image Acquisition and picture control for target, including:As the ccd image sensor of image collecting device, acquisition electricity
Power equipment image;Lens protective cover as shown in Figure 2 covers on the outside of the camera lens of ccd image sensor, the glass of front end
Piece 1 and the camera lens 4 of image collecting device are oppositely arranged, and the inside of lens protective cover is equipped with interdigital transducer 2, the interdigital transducer
2 convert electrical energy into surface acoustic wave 3, to drive the water droplet being dropped on sheet glass 1 to be moved downward along sheet glass 1, reach clear
Wash the effect of sheet glass 1;Based on the image processing apparatus of high-speed dsp chip design, with ccd image sensor and interdigital transducing
Device 2 connects, and with the image for acquiring ccd image sensor handle and control interdigital transducer 2;Picture control fills
It sets, is connect by optical fiber with image processing apparatus, the image that image processing apparatus processing is completed is modulated by photoelectric converter
At optical signal, it is then transmitted through the fiber to image monitor, image monitor has signal demodulation and image recognition
Function realizes the monitoring to power equipment image.
It should be noted that in other embodiments, interdigital transducer 2 can not also be connect with image processing apparatus,
But connect with another control device, it is run to receive signal from another control device, electric energy is turned
Turn to surface acoustic wave.
Referring to FIG. 3, and combine and refer to figure 1 and Fig. 2, acquisition target clear image under the conditions of the rain and fog weather of the present embodiment
System the step of being illustrated with Fig. 3 by operation corresponding program realization power equipment image that ccd image sensor is acquired
That is the acquisition and processing of target image:
Control interdigital transducer 2 converts electrical energy into surface acoustic wave, and the water droplet on sheet glass 1 is dropped in along glass with driving
Glass piece 1 moves downward, and achievees the effect that clean sheet glass 1;
Ccd image sensor Quick Acquisition T width images continuous to same target;
Image processing apparatus receive ccd image sensor acquisition for same target different time T width images, and
By T width image superpositions, the value for obtaining each pixel isWherein, Nt(x, y) indicates serial number t's
The misty rain component of each pixel in image, StThe target component of each pixel, t are indicated in the image of (x, y) expression serial number t
The serial number of image, related to time domain, (x, y) is the coordinate of pixel, related to spatial domain;
Image processing apparatus averages in the time domain to all pixels point, obtains single width mean value image, the single width mean value figure
The value of each pixel is N as in0+S0(x, y), wherein N0Approximately it is equal toS0(x, y) is equal to
Image processing apparatus filters out N in single width mean value image0, obtain only including target component S0The image of (x, y);
Image processing apparatus is using histogram equalization algorithm by above-mentioned only comprising target component S0The image of (x, y) is into traveling
One step processing, to enhance picture contrast;
Image processing apparatus by through above-mentioned enhancing contrast handle only include target component S0The image transmitting of (x, y) is given
Image monitor.
The method of target clear image is obtained under the conditions of the rain and fog weather of the present embodiment based on the misty rain of above-mentioned the present embodiment
The system that target clear image is obtained under weather condition is realized, and is obtained under the conditions of its step and the rain and fog weather of above-mentioned the present embodiment
It takes the correlation step of the system of target clear image corresponding, therefore repeats no more.
It should be noted that the above list is only specific embodiments of the present invention, it is clear that the present invention is not limited to implement above
Example has many similar variations therewith.If those skilled in the art directly exports or joins from present disclosure
All deformations expected, are within the scope of protection of the invention.
Claims (8)
1. the system for obtaining target clear image under the conditions of a kind of rain and fog weather, which is characterized in that including:
Image collecting device acquires image;
Lens protective cover covers on the outside of the camera lens of described image harvester, and the inside of the lens protective cover is equipped with fork
Finger transducer, the interdigital transducer convert electrical energy into surface acoustic wave, the water droplet being dropped in driving on the outside of lens protective cover
It is moved downward along lens protective cover;
Image processing apparatus is connect with described image harvester, is handled with the image to image acquisition device;
Image monitor is connect with described image processing unit, to receive the image that image processing apparatus processing is completed;
Wherein, described image processing unit receive image acquisition device for same target different time T width figures
Picture, by T width image superpositions, the value for obtaining each pixel is described image processing unitWherein, Nt
(x, y) indicates the misty rain component of each pixel in the image of serial number t, StEach pixel in the image of (x, y) expression serial number t
The target component of point, t indicates the serial number of image, related to time domain, and (x, y) is the coordinate of pixel, related to spatial domain;Then
Image processing apparatus averages in the time domain to all pixels point, obtains single width mean value image, each in the single width mean value image
The value of pixel is N0+S0(x, y), wherein N0Approximately it is equal toS0(x, y) is equal toFigure
As processing unit filters out N in single width mean value image0, obtain only including target component S0The image of (x, y) is then transferred to described
Image monitor.
2. the system for obtaining target clear image under the conditions of rain and fog weather as described in claim 1, which is characterized in that the figure
Only include target component S by described in as processing unit also uses histogram equalization algorithm0The image of (x, y) is further located
Reason, to be transferred to described image monitoring device after enhancing picture contrast.
3. the system for obtaining target clear image under the conditions of rain and fog weather as claimed in claim 1 or 2, which is characterized in that institute
It states image collector and is set to ccd image sensor.
4. the system for obtaining target clear image under the conditions of rain and fog weather as described in claim 1, which is characterized in that the figure
As being connected by optical fiber between processing unit and image monitor.
5. a kind of method for obtaining target clear image under the conditions of rain and fog weather, it is characterised in that:
Lens protective cover is set on the outside of the camera lens of image collecting device, and the inside of the lens protective cover is equipped with interdigital transducing
Device, the interdigital transducer convert electrical energy into surface acoustic wave, and the water droplet on the outside of lens protective cover is dropped in along mirror with driving
Head protective cover moves downward;
Acquire target image and processing target image comprising:
(1) Quick Acquisition T width images continuous to same target;
(2) by T width image superpositions, the value for obtaining each pixel isWherein, Nt(x, y) indicates serial number
For the misty rain component of each pixel in the image of t, StThe target component of each pixel in the image of (x, y) expression serial number t,
T indicates the serial number of image, related to time domain, and (x, y) is the coordinate of pixel, related to spatial domain;
(3) it averages in the time domain to all pixels point, obtains single width mean value image, each pixel in the single width mean value image
Value be N0+S0(x, y), wherein N0Approximately it is equal toS0(x, y) is equal to
(4) N in single width mean value image is filtered out0, obtain only including target component S0The image of (x, y);
Treated target image is transferred out.
6. the method for obtaining target clear image under the conditions of rain and fog weather as claimed in claim 5, which is characterized in that wherein adopt
It further includes step (5) to collect target image and processing target image:Using histogram equalization algorithm only comprising target component by described in
S0The image of (x, y) is further processed, to enhance picture contrast.
7. the method as obtained target clear image under the conditions of rain and fog weather described in claim 5 or 6, which is characterized in that
Ccd image sensor Quick Acquisition T width images continuous to same target are used in the step (1).
8. the method as obtained target clear image under the conditions of rain and fog weather described in claim 5 or 6, which is characterized in that will
Treated target image is transferred to image monitor.
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JP2009267536A (en) * | 2008-04-22 | 2009-11-12 | Canon Inc | Imaging apparatus |
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CN104537634A (en) * | 2014-12-31 | 2015-04-22 | 中国科学院深圳先进技术研究院 | Method and system for removing raindrop influences in dynamic image |
CN104978718A (en) * | 2015-06-12 | 2015-10-14 | 中国科学院深圳先进技术研究院 | Video raindrop removing method and system based on image entropy |
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JP2009267536A (en) * | 2008-04-22 | 2009-11-12 | Canon Inc | Imaging apparatus |
CN104331865A (en) * | 2014-10-22 | 2015-02-04 | 中国科学院深圳先进技术研究院 | Video raindrop detection and removing method based on naive Bayesian probability model |
CN104537634A (en) * | 2014-12-31 | 2015-04-22 | 中国科学院深圳先进技术研究院 | Method and system for removing raindrop influences in dynamic image |
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