CN105635527A - System and method for obtaining clear target image under rain and fog weather conditions - Google Patents
System and method for obtaining clear target image under rain and fog weather conditions Download PDFInfo
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- CN105635527A CN105635527A CN201610038796.9A CN201610038796A CN105635527A CN 105635527 A CN105635527 A CN 105635527A CN 201610038796 A CN201610038796 A CN 201610038796A CN 105635527 A CN105635527 A CN 105635527A
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- misty rain
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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 a system for obtaining a clear target image under rain and fog weather conditions. The system comprises an image collection device used for collecting an image; a lens protection cover covered on the outer side of a lens of the image collection device, wherein an interdigital transducer is arranged on the inner side of the lens protection cover, and the interdigital transducer converts electric energy into surface acoustic waves to drive droplets dropping onto the outer side of the lens protection cover to move downwards along the lens protection cover; an image processing device connected with the image collection device for processing the image collected by the image collection device; and an image monitoring device connected with the image processing device for receiving the image processed by the image processing device. The system can obtain the clear target image under the rain and fog weather conditions, so as to improve the image quality and reliability of image monitoring. Correspondingly, the invention further discloses a method for obtaining the clear target image under the rain and fog weather conditions.
Description
Technical field
The present invention relates to a kind of system and method obtaining target picture rich in detail, particularly relate to the system and method obtaining target picture rich in detail under a kind of misty rain weather condition.
Background technology
Current image monitoring is employed in a lot of fields, for instance power equipment image monitoring, and it adopts image processing techniques to drastically increase work efficiency, and has ensured personal safety. But, under misty rain weather condition, the target image of acquisition is smudgy, and contrast reduces, and brings very big difficulty to monitoring.
In traditional solution, being difficult to find that a set of general algorithm in the technical field based on pure image procossing, there is bigger limitation in its range of application, and the image restoration technology algorithm based on misty rain physical model is complicated, consuming time longer.
Summary of the invention
An object of the present invention be to provide under a kind of misty rain weather condition obtain target picture rich in detail system, this system can obtain the picture rich in detail of target under misty rain weather condition, thus improving picture quality and the reliability of image monitoring.
It is a further object of the present invention to provide a kind of method obtaining target picture rich in detail under misty rain weather condition, the method can obtain the picture rich in detail of target under misty rain weather condition, thus improving picture quality and the reliability of image monitoring.
According to foregoing invention purpose, the present invention proposes the system obtaining target picture rich in detail under a kind of misty rain weather condition, comprising:
Image collecting device, it gathers image;
Lens protective cover, it covers at outside the camera lens of described image collecting device, the inner side of described lens protective cover is provided with interdigital transducer, and described interdigital transducer converts electrical energy into surface acoustic wave, to drive the water droplet being dropped in outside lens protective cover to move downward along lens protective cover;
Image processing apparatus, it is connected with described image collecting device, processes with the image to image acquisition device;
Image monitor, it is connected with described image processing apparatus, to receive the image that image processing apparatus has processed.
The system of target picture rich in detail is obtained under misty rain weather condition of the present invention, by the water droplet of attachment in daylighting passage outside the camera lens of image collecting device being removed equipped with the lens protective cover of interdigital transducer, thus eliminating the water droplet impact on camera lens daylighting, by image processing apparatus, the image of image acquisition device is processed, the algorithm process that this process usually carries out for the misty rain impact on camera lens daylighting, is transferred to image monitor afterwards. This system passes through the lens protective cover equipped with interdigital transducer and the combination of image processing apparatus, solve the limitation of traditional solution and the problem of complexity, the picture rich in detail of target can be obtained, thus improving picture quality and the reliability of image monitoring under misty rain weather condition.
Obtaining in the system of target picture rich in detail under misty rain weather condition of the present invention, the Main Function of described lens protective cover is to avoid water droplet to pollute camera lens; The Main Function of described interdigital transducer is to convert electrical energy into surface acoustic wave, to drive the water droplet being dropped in outside lens protective cover to move downward, thus reaching to clean the effect outside lens protective cover, reduce water droplet or the impact on camera lens daylighting of other foreign material as far as possible.
Further, obtain in the system of target picture rich in detail under misty rain weather condition of the present invention, described image processing apparatus receive image acquisition device for the same target T width image at different time, described image processing apparatus is by T width image overlay, and the value obtaining each pixel isWherein, Nt(x y) represents the misty rain component of each pixel in the image that sequence number is t, St(x, y) represents the target component of each pixel in the image that sequence number is t, and t represents the sequence number of image, and it is relevant to time domain, (and x, y) for the coordinate of pixel, relevant to spatial domain; Then all pixels are averaged by image processing apparatus in time domain, obtain single width average image, and in described single width average image, the value of each pixel is N0+S0(x, y), wherein N0Approximate is equal toS0(x y) is equal toImage processing apparatus filters N in single width average image0, only comprised target component S0(x, image y) are then transferred to described image monitor.
In such scheme, the image of image acquisition device is processed by described image processing apparatus by the way, to filter the misty rain impact on image, obtain target image clearly further, its principle is: first image collecting device obtains the same target T width image at different time, being usually acquisition of in extremely rapid succession taking pictures within certain period, in described T width image, the value of each pixel all comprises misty rain component Nt(x, y) with target component St(x, y), wherein t represents the sequence number of image, relevant to time domain, (x, y) for the coordinate of pixel, relevant to spatial domain. Owing to misty rain has time domain dynamic, in described T width image, same pixel has time domain random distribution nature, described misty rain component N in not value in the same timet(x y) is jamming target component St(x, background noise y). By the value that described T width image overlay obtains each pixel it is
After described T width image overlay, the misty rain component of each pixel tends to identical, namelyIt is approximately a constant, is designated as TN0. Owing to target is generally of stationary characteristic, in described T width image, the pixel of same coordinate has the target component of equivalence, is designated as S0(x, y), then the pixel of same coordinate target component value after described T width image overlay is TS0(x, y). All pixels under described T width image overlay are averaged in time domain and obtains single width average image, then in this single width average image, the value of each pixel is N0+S0(x, y). In described single width average image, misty rain component N0Spatial domain shows as zero-frequency component, is filtered by pure image processing techniques, only comprised target component S0(x, image y).
Further, obtaining in the system of target picture rich in detail under above-mentioned misty rain weather condition, described image processing apparatus also adopts histogram equalization algorithm only to comprise target component S by described0(x, image y) is further processed, to be transferred to described image monitor after strengthening picture contrast.
Further, obtaining in the system of target picture rich in detail under of the present invention or above-mentioned misty rain weather condition, described image collector is set to CCD (charge-coupled image sensor) imageing sensor.
Further, obtaining under misty rain weather condition of the present invention in the system of target picture rich in detail, being connected by optical fiber between described image processing apparatus and image monitor, with by fiber-optic transfer image information, thus avoiding electromagnetic interference.
Correspondingly, the invention allows for a kind of method obtaining target picture rich in detail under misty rain weather condition, comprising:
Camera lens arranged outside lens protective cover at image collecting device, the inner side of described lens protective cover is provided with interdigital transducer, described interdigital transducer converts electrical energy into surface acoustic wave, to drive the water droplet being dropped in outside lens protective cover to move downward along lens protective cover;
Gather target image and process target image;
Treated target image is transferred out.
The method obtaining target picture rich in detail under misty rain weather condition of the present invention, by the water droplet of attachment in daylighting passage outside the camera lens of image collecting device being removed equipped with the lens protective cover of interdigital transducer, thus eliminating the water droplet impact on camera lens daylighting, and the image gathered is processed, the algorithm process that this process usually carries out for the misty rain impact on camera lens daylighting, transfers out treated target image afterwards. The method has the lens protective cover of interdigital transducer and the combination of image procossing by installing, solve the limitation of traditional solution and the problem of complexity, the picture rich in detail of target can be obtained, thus improving picture quality and the reliability of image monitoring under misty rain weather condition.
Obtaining in the method for target picture rich in detail under misty rain weather condition of the present invention, the Main Function of described lens protective cover is to avoid water droplet to pollute camera lens; The Main Function of described interdigital transducer is to convert electrical energy into surface acoustic wave, to drive the water droplet being dropped in outside lens protective cover to move downward, thus reaching to clean the effect outside lens protective cover, reduce water droplet or the impact on camera lens daylighting of other foreign material as far as possible.
Further, obtain in the method for target picture rich in detail under misty rain weather condition of the present invention, gather target image and process the step of target image and include:
(1) to same target continuous Quick Acquisition T width image;
(2) by T width image overlay, the value obtaining each pixel isWherein, Nt(x y) represents the misty rain component of each pixel in the image that sequence number is t, St(x, y) represents the target component of each pixel in the image that sequence number is t, and t represents the sequence number of image, and it is relevant to time domain, (and x, y) for the coordinate of pixel, relevant to spatial domain;
(3) all pixels being averaged in time domain, obtain single width average image, in described single width average image, the value of each pixel is N0+S0(x, y), wherein N0Approximate is equal toS0(x y) is equal to
(4) N in single width average image is filtered0, only comprised target component S0(x, image y).
In such scheme, gather target image by above-mentioned steps and process target image, to filter the misty rain impact on image, obtaining further target image clearly, the principle that image is processed by its principle with above-mentioned image processing apparatus is identical, repeats no more herein.
Further, the method obtaining target picture rich in detail under above-mentioned misty rain weather condition also includes step (5): adopt histogram equalization algorithm only to comprise target component S by described0(x, image y) is further processed, to strengthen picture contrast.
Preferably, obtain in the method for target picture rich in detail under above-mentioned misty rain weather condition, adopt ccd image sensor to same target continuous Quick Acquisition T width image in described step (1).
Further, obtain under of the present invention or above-mentioned misty rain weather condition in the method for target picture rich in detail, treated target image is transferred to image monitor.
Obtaining the system of target picture rich in detail under misty rain weather condition of the present invention, its advantage compared with traditional solution includes:
(1) used the effect reached outside cleaning lens protective cover, its simple in construction by the combination of lens protective cover with interdigital transducer, cost is low, safety, good stability, and mechanical is worn and torn;
(2) by using with the combination of image processing apparatus with the lens protective cover of interdigital transducer, the mode making image processing apparatus process image is simple, solve the limitation of traditional solution and the problem of complexity, the picture rich in detail of target can be obtained, thus improving picture quality and the reliability of image monitoring under misty rain weather condition.
The method obtaining target picture rich in detail under misty rain weather condition of the present invention, its advantage compared with traditional solution includes:
(1) used the effect reached outside cleaning lens protective cover, its simple in construction by the combination of lens protective cover with interdigital transducer, cost is low, safety, good stability, and mechanical is worn and torn;
(2) used with the combination of image processing step by the aforesaid way of effect reached outside cleaning lens protective cover, make the method processing image simple, solve the limitation of traditional solution and the problem of complexity, the picture rich in detail of target can be obtained, thus improving picture quality and the reliability of image monitoring under misty rain weather condition.
Accompanying drawing explanation
Fig. 1 is the system obtaining target picture rich in detail under misty rain weather condition of the present invention structural schematic block diagram under a kind of embodiment.
Fig. 2 is the structural representation of the system obtaining target picture rich in detail under misty rain weather condition of the present invention lens protective cover under a kind of embodiment.
Fig. 3 is the method obtaining target picture rich in detail under misty rain weather condition of the present invention flow chart under a kind of embodiment.
Detailed description of the invention
Below in conjunction with Figure of description and specific embodiment, the system and method obtaining target picture rich in detail under misty rain weather condition of the present invention is described in further detail.
Fig. 1 illustrates to obtain under the misty rain weather condition of the present embodiment the structure of the system of target picture rich in detail, Fig. 2 illustrates to obtain under the misty rain weather condition of the present embodiment the structure of the lens protective cover of the system of target picture rich in detail, and Fig. 3 illustrates to obtain under the misty rain weather condition of the present embodiment the flow chart of the method for target picture rich in detail.
As it is shown in figure 1, obtain the system of target picture rich in detail under the misty rain weather condition of the present embodiment, for carrying out image acquisition and picture control with power equipment for target, including: as the ccd image sensor of image collecting device, it gathers power equipment image; Lens protective cover as shown in Figure 2, it covers at outside the camera lens of ccd image sensor, the sheet glass 1 of its front end is oppositely arranged with the camera lens 4 of image collecting device, the inner side of lens protective cover is provided with interdigital transducer 2, this interdigital transducer 2 converts electrical energy into surface acoustic wave 3, to drive the water droplet being dropped on sheet glass 1 to move downward along sheet glass 1, reach to clean the effect of sheet glass 1; Based on the image processing apparatus of high-speed dsp chip design, it is connected with ccd image sensor and interdigital transducer 2, processes with the image to ccd image sensor collection and interdigital transducer 2 is controlled; Image monitor, it is connected by optical fiber with image processing apparatus, the image that image processing apparatus has processed is modulated into optical signal through optical-electrical converter, then pass through fiber-optic transfer to image monitor, image monitor has signal demodulation and image identification function, it is achieved the monitoring to power equipment image.
It should be noted that in other embodiments, interdigital transducer 2 can not also be connected with image processing apparatus, but control device with another one and be connected, thus controlling device reception signal from this another one and running, to convert electrical energy into surface acoustic wave.
Refer to Fig. 3, and combine with reference to Fig. 1 and Fig. 2, the system obtaining target picture rich in detail under the misty rain weather condition of the present embodiment realizes collection and the process of power equipment image and the target image that ccd image sensor is gathered by running program corresponding with the step of Fig. 3 signal:
Control interdigital transducer 2 and convert electrical energy into surface acoustic wave, to drive the water droplet being dropped on sheet glass 1 to move downward along sheet glass 1, reach to clean the effect of sheet glass 1;
Ccd image sensor is to same target continuous Quick Acquisition T width image;
Image processing apparatus receive that ccd image sensor gathers for the same target T width image at different time, and by T width image overlay, the value obtaining each pixel isWherein, Nt(x y) represents the misty rain component of each pixel in the image that sequence number is t, St(x, y) represents the target component of each pixel in the image that sequence number is t, and t represents the sequence number of image, and it is relevant to time domain, (and x, y) for the coordinate of pixel, relevant to spatial domain;
All pixels are averaged by image processing apparatus in time domain, obtain single width average image, and in this single width average image, the value of each pixel is N0+S0(x, y), wherein N0Approximate is equal toS0(x y) is equal to
Image processing apparatus filters N in single width average image0, only comprised target component S0(x, image y);
Image processing apparatus adopts histogram equalization algorithm only to comprise target component S by above-mentioned0(x, image y) is further processed, to strengthen picture contrast;
Image processing apparatus only comprises target component S by what process through above-mentioned enhancing contrast ratio0(x, image transmitting y) is to image monitor.
The method obtaining target picture rich in detail under the misty rain weather condition of the present embodiment realizes based on the system obtaining target picture rich in detail under the misty rain weather condition of above-mentioned the present embodiment, and its step is corresponding with the correlation step of the system obtaining target picture rich in detail under the misty rain weather condition of above-mentioned the present embodiment, therefore repeats no more.
It should be noted that listed above is only specific embodiments of the invention, it is clear that the invention is not restricted to above example, there are many similar changes therewith. If all deformation that those skilled in the art directly derives from present disclosure or associates, protection scope of the present invention all should be belonged to.
Claims (10)
1. obtain the system of target picture rich in detail under a misty rain weather condition, it is characterised in that including:
Image collecting device, it gathers image;
Lens protective cover, it covers at outside the camera lens of described image collecting device, the inner side of described lens protective cover is provided with interdigital transducer, and described interdigital transducer converts electrical energy into surface acoustic wave, to drive the water droplet being dropped in outside lens protective cover to move downward along lens protective cover;
Image processing apparatus, it is connected with described image collecting device, processes with the image to image acquisition device;
Image monitor, it is connected with described image processing apparatus, to receive the image that image processing apparatus has processed.
2. under misty rain weather condition as claimed in claim 1, obtain the system of target picture rich in detail, it is characterized in that, described image processing apparatus receive image acquisition device for the same target T width image at different time, described image processing apparatus is by T width image overlay, and the value obtaining each pixel isWherein, Nt(x y) represents the misty rain component of each pixel in the image that sequence number is t, St(x, y) represents the target component of each pixel in the image that sequence number is t, and t represents the sequence number of image, and it is relevant to time domain, (and x, y) for the coordinate of pixel, relevant to spatial domain; Then all pixels are averaged by image processing apparatus in time domain, obtain single width average image, and in described single width average image, the value of each pixel is N0+S0(x, y), wherein N0Approximate is equal toS0(x y) is equal toImage processing apparatus filters N in single width average image0, only comprised target component S0(x, image y) are then transferred to described image monitor.
3. obtain the system of target picture rich in detail under misty rain weather condition as claimed in claim 2, it is characterised in that described image processing apparatus also adopts histogram equalization algorithm only to comprise target component S by described0(x, image y) is further processed, to be transferred to described image monitor after strengthening picture contrast.
4. in claim 1-3, under misty rain weather condition as described in any one, obtain the system of target picture rich in detail, it is characterised in that described image collector is set to ccd image sensor.
5. obtain the system of target picture rich in detail under misty rain weather condition as claimed in claim 1, it is characterised in that be connected by optical fiber between described image processing apparatus and image monitor.
6. the method obtaining target picture rich in detail under a misty rain weather condition, it is characterised in that:
Camera lens arranged outside lens protective cover at image collecting device, the inner side of described lens protective cover is provided with interdigital transducer, described interdigital transducer converts electrical energy into surface acoustic wave, to drive the water droplet being dropped in outside lens protective cover to move downward along lens protective cover;
Gather target image and process target image;
Treated target image is transferred out.
7. the method obtaining target picture rich in detail under misty rain weather condition as claimed in claim 6, it is characterised in that gather target image and process the step of target image and include:
(1) to same target continuous Quick Acquisition T width image;
(2) by T width image overlay, the value obtaining each pixel isWherein, Nt(x y) represents the misty rain component of each pixel in the image that sequence number is t, St(x, y) represents the target component of each pixel in the image that sequence number is t, and t represents the sequence number of image, and it is relevant to time domain, (and x, y) for the coordinate of pixel, relevant to spatial domain;
(3) all pixels being averaged in time domain, obtain single width average image, in described single width average image, the value of each pixel is N0+S0(x, y), wherein N0Approximate is equal toS0(x y) is equal to
(4) N in single width average image is filtered0, only comprised target component S0(x, image y).
8. the method obtaining target picture rich in detail under misty rain weather condition as claimed in claim 7, it is characterised in that also include step (5): adopt histogram equalization algorithm only to comprise target component S by described0(x, image y) is further processed, to strengthen picture contrast.
9. the method obtaining target picture rich in detail in claim 7 or 8 under misty rain weather condition as described in any one, it is characterised in that adopt ccd image sensor to same target continuous Quick Acquisition T width image in described step (1).
10. the method obtaining target picture rich in detail in claim 6-8 under misty rain weather condition as described in any one, it is characterised in that treated target image is transferred to image monitor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610038796.9A CN105635527B (en) | 2016-01-20 | 2016-01-20 | The system and method for target clear image is obtained under the conditions of a kind of rain and fog weather |
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| CN201610038796.9A CN105635527B (en) | 2016-01-20 | 2016-01-20 | The system and method for target clear image is obtained under the conditions of a kind of rain and fog weather |
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| CN105635527A true CN105635527A (en) | 2016-06-01 |
| CN105635527B CN105635527B (en) | 2018-10-23 |
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Cited By (2)
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| CN105979001A (en) * | 2016-06-28 | 2016-09-28 | 济南祥辰科技有限公司 | System for monitoring four agricultural and forestal conditions |
| US10282827B2 (en) | 2017-08-10 | 2019-05-07 | Wipro Limited | Method and system for removal of rain streak distortion from a video |
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| CN105635527B (en) | 2018-10-23 |
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