CN101726693A - Method for seeking discharge regions of power devices on ultraviolet images - Google Patents
Method for seeking discharge regions of power devices on ultraviolet images Download PDFInfo
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- CN101726693A CN101726693A CN200910153912A CN200910153912A CN101726693A CN 101726693 A CN101726693 A CN 101726693A CN 200910153912 A CN200910153912 A CN 200910153912A CN 200910153912 A CN200910153912 A CN 200910153912A CN 101726693 A CN101726693 A CN 101726693A
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Abstract
The invention discloses a method for seeking discharge regions of power devices on ultraviolet images, which comprises the following steps: firstly collecting the ultraviolet images, carrying out pretreatment on the ultraviolet images, further detecting corona regions on the ultraviolet images by treating visible light images stacked together on the collected ultraviolet images, initially detecting the discharge regions, and then removing the interferences of a plurality of backgrounds according to the features of the corona regions for each ultraviolet image; determining whether the devices in the region discharge or not by using a plurality of frames of images for tracking; and the method can simultaneously track a plurality of discharge regions on each image. The method can carry out analysis and diagnosis on the collected images in a real-time on-line manner under the airborne real-time detection requirement in a helicopter patrol inspection system, and determine whether a power transmission line has defects or not; furthermore, the method is characterized by improving the efficiency of line inspection and improving the accuracy of defect diagnosis.
Description
Technical field
The present invention relates to a kind of method of on ultraviolet image, seeking the power equipment discharge zone.Specially refer to a kind of method of following the tracks of maximum region of discharge from the continuous multiple frames ultraviolet image, this method can trace into the target area accurately, and can be applied in the real-time online detection of ultra-high-tension power transmission line.
Background technology
High-voltage electric power circuit is the lifeblood of national economy, and it is the industry of each country, the basic guarantee of people's lives.So maintenance, maintenance for power circuit are just very important.At present, to the maintenance of high-voltage electric power circuit, mainly be to be undertaken by the mode of artificial line walking, maybe with the transmission line of electricity image that collects, judge the defective of circuit by the human eye contrast.In various electric power line inspection means, adopt helicopter that the high voltage overhead power transmission sequence is patrolled and examined and have higher efficient.Multispectral image capture device is installed on helicopter, is used for the defective of transmission line of electricity is detected.
Visible light is mainly used to find the problem that the surface of some power circuits may exist, as disconnected strand of lead, adhere to the displacement of falling string, stockbridge damper on foreign matter, the glass insulator, defective such as damaged; Infrared light mainly judges whether there is possible defective on the circuit by the temperature variation that detects the equipment on the power circuit; Whether ultraviolet light mainly is to detect power equipment by the size that detects the corona zone to have problems.
Here the ultraviolet light of indication is a day blind ultraviolet (Solid Blind UV), the ultraviolet light of its wavelength between 220～280nm.Because dust and the scattering of particulate and the effect of absorption in the atmospheric envelope, enter in the atmospheric sunshine this part ultraviolet light content seldom, almost nil.So at this wave band of 220～280nm, the UV radiation of target is better than the radiation of sunshine, target just is easy to be displayed.
If there is corona phenomenon in power equipment and since the corona zone in the radiation intensity in 220～280nm zone greater than sunshine, so the brightness in corona zone is necessarily much larger than other zones on the ultraviolet picture of gathering.Like this, just, can judge whether the equipment on the power circuit exists electric discharge phenomena by the luminance area of analyzing on the ultraviolet image.Therefore day blind ultraviolet detects very effective to the power equipment that the corona defective is arranged.Have statistics to show, in the detection of power equipment, the problem of finding by ultraviolet detection has accounted for 50% of total problem number, and infrared and visible light then respectively accounts for 28% and 22%.As seen ultraviolet detection has played more and more important effect in electric power line inspection.
Document " Zhao Yuhuan, Yan Feng, Sui Yongxin, Yang Huaijiang, Cao Jianlin, the extraction of target in the ultraviolet sequence image. photoelectric project .2007 November, the 34th volume o. 11th " in processing to ultraviolet image has been proposed, comprising to the noise reduction process of ultraviolet image.Because high-tension bus-bar generally is laid on open-air, so, the interference of some backgrounds comprised on the image of detection possibly.Existing processing for ultraviolet image is not carried out the processing that some background interference are got rid of to it, such as house owed by a citizen etc., causes because the interference of background causes the erroneous judgement of corona phenomenon many.
Be to detect guide rule by the take the lead correct assessment of a pole line corona phenomenon write of U.S. EPRI company in the document " Jiang Huofu; the application of UV corona detector in corona discharge detects; 32 the 8th phases of volume of east china electric power .2004 August-Di ", wherein to adopt similar relative method, analysis file method all be power equipment ultraviolet image and more existing historical records of collection will to be compared to the ultraviolet evaluation method of Jie Shaoing.So just can't accomplish the requirement of detection in real time.
Summary of the invention
In order to address the above problem, the object of the present invention is to provide a kind of method of on ultraviolet image, seeking the power equipment discharge zone, can be used in the helicopter cruising inspection system, under airborne real-time detection requires, real-time online carries out analyzing and diagnosing to the image of gathering, and whether definite transmission line of electricity exist defective, and the present invention has the efficient that can improve line walking, the characteristics that improve the defect diagonsis correctness.
For reaching above-mentioned purpose, the present invention adopts following technical scheme,
At the power equipment discharge fault, be used to detect the method in corona zone on the ultraviolet image, comprise the steps: at first to gather ultraviolet image, and ultraviolet image carried out pre-service, by the visible images that is superimposed on the ultraviolet image of gathering is handled, and then detect corona zone on the ultraviolet image, go out region of discharge with this Preliminary detection; For every frame ultraviolet image, also to get rid of the interference of some backgrounds then according to the characteristic in some corona zones; Whether follow the tracks of the equipment of determining in this zone by multiple image discharges; And can follow the tracks of a plurality of region of discharges on each two field picture simultaneously.
Described pre-service comprises gray processing, noise reduction process and binaryzation.
Described noise reduction process is meant and adopts morphology 5 * 5 wave filters to carry out noise reduction process, deletes some little isolated noise points.
Described binaryzation is meant that the visible images that will be superimposed with ultraviolet image carries out unified color range and expands to normalized image and handle, adopt unified luminance threshold thresholding to adjudicate, the luminance threshold thresholding is chosen between 235～245, the ultraviolet coloured image is converted into luminance picture, the judgement of employing luminance threshold, the bianry image of generation ultraviolet; It is the corona zone that " 1 " on the bianry image expresses possibility; " 0 " expression background area; Go out region of discharge with this Preliminary detection.
The method that described characteristic according to some corona zones is got rid of the interference of some backgrounds is meant according to the power equipment discharge zone has the corona zone generally to be rendered as big zone, be accompanied by some zonules on every side again, and general area is the characteristic of similar round, the ultraviolet bianry image that tentatively is judged as region of discharge is adopted pixel region management and the method for measuring, get rid of the interference of some backgrounds, the corona zone of erroneous judgement is rejected.
The method of described pixel region management is: at first use the rectangle degree of fitting to get rid of on the ultraviolet bianry image corona zone ineligible on some geometric configuratioies; Again each qualified corona zone is judged, the foundation of judging is the enlarged areas that this is regional, search in the areal extent that enlarges whether also have other corona zone, thereby judged whether this corona zone meets flash-over characteristic, the corona zone that does not meet flash-over characteristic is rejected; The method that described pixel region is measured is: the ultraviolet bianry image is scanned, the pixel that " 1 " is communicated with is formed a zone, after bianry image scanning, may produce a plurality of zones, further each regional shape is carried out two parameter measurements again, measure each regional length breadth ratio, be evident as rectangular or wire, reject this zone; Measure the circle in each zone and seemingly spend, as be evident as rectangle, reject this zone; After above-mentioned all erroneous judgement corona zone rejectings, obtain judgement corona zone more accurately.
Described power equipment discharge is divided into continuous discharge and discontinuity is discharged two kinds; The continuity relative region of discharge that discharges is less, and discharge is all arranged on every two field picture; The discontinuity relative region of discharge that discharges is bigger, is not all to have discharge on every two field picture.
Do further judgement with adopting the ultraviolet bianry image after pixel region management and the method for measuring are handled, divide following two kinds of situations to handle to it, first kind of situation is when the big (ultraviolet image to 720 * 576 of the region area that records, area has accounted for 1/4), circle is seemingly spent higher, in follow-up multiframe, has similar large area region again in the image access areas, can determine it is intermittent discharge, equipment deficiency is more serious; Second situation is that power equipment discharge exists certain distribution and directivity, on bianry image, show as in the certain area coverage that a plurality of zones roughly are distributed in image, and the discharge directivity may with component defect position and line of electric force, the installation position of insulator is relevant, for determining this distributed areas, at first finding out may be maximum corona zone, with this zone as unit area, in 8 neighborhoods around it, search for, further 24 neighborhoods around second level are searched for, determine whether there is little zone in the neighborhood, as there being many little zones in the neighborhood, the zone that can determine this maximum is the image at place, corona zone.
Describedly multiple image is followed the tracks of the equipment of determining in this zone whether discharge and be meant that the corona zone that will determine also needs to carry out sequential and follows the tracks of.
Described sequential is followed the tracks of and is meant when detecting first frame and have the image in corona zone, notes the corona zone of detected maximum, and this area stores is gone in the corona timing management structure; When second two field picture arrives, earlier first the maximum corona zone in the corona timing management structure is followed the tracks of.Coordinate according to the boundary rectangle in the attribute in first maximum corona zone in photo current finds respective regions, owing to do not know the direction of motion of capture apparatus in advance, so should respectively enlarge 30 pixels up and down in the zone, obtain a tracing area AREA ' (X
1, Y
1, X
2, Y
2)=AREA (X
1± 30, Y
1± 30, X
2± 30, Y
2± 30), wherein AREA ' is the zone after enlarging, and AREA is original zone, (X
1, Y
1), (X
2, Y
2) be the upper left corner in zone and the coordinate in the lower right corner, as shown in Figure 1, be the zone after original zone and the expansion;
When tracing area has corona discharge on present image, then the photon number of first the maximum region of discharge in the corona sequential organization and the photon number in the tracing area are added up, minimum boundary rectangle that simultaneously should the maximum region of discharge is updated to the minimum boundary rectangle of the region of discharge in the tracing area; Otherwise this zone does not have corona discharge on the present image, and first maximum corona zone remains unchanged; Then, again second two field picture is detected, at first find the maximum corona zone on second two field picture, (coordinate that is minimum boundary rectangle is close if this corona zone is identical with first the maximum corona zone in the corona sequential organization, or differ the distance of several pixels) then this corona zone is not joined in the corona timing management structure, otherwise should maximum corona zone put into the end of corona timing management structure as new structure;
When receiving the next frame ultraviolet image, all carry out and above-mentioned similar processing.Just need do one when new maximum corona zone domain structure is joined corona timing management structure judges, when corona timing management structure has expired (degree of depth that is structure has reached default size), just need earlier first the maximum corona zone domain structure in the corona timing management structure to be deleted, the maximum corona zone domain structure that will newly create again joins the end of corona timing management structure;
When treated number of image frames reaches default when big or small, just need judge and export the result first the maximum corona zone domain structure in the corona timing management structure; The foundation of judging be exactly accumulative total photoelectron number in first structure attribute whether greater than a threshold value, and in these treated images, whether the discharge frame number in this zone has reached a default thresholding; If condition all meets, then export the result, otherwise do not export the result, and delete this structure.
When export structure, because each maximum region of discharge is all followed the tracks of, as long as there is discharge, the coordinate of the minimum boundary rectangle in this zone will upgrade; So, need only the minimum boundary rectangle of exporting this maximum region during output.
Said process is at only get the situation that follow the tracks of in a maximum corona zone on a two field picture; Can expand to equally getting the situation that follow the tracks of in a plurality of big coronas zone on the two field picture, just at this moment need to increase a container and be used for placing a plurality of structures pond.
The invention has the beneficial effects as follows: because the characteristic of high voltage electric power equip ment discharge has continuous discharge, the intermittent discharge dual mode.The intermittent discharge mode: region of discharge is bigger, and device damage is more serious, easily identification; The continuous discharge mode: equipment continuous discharge, region of discharge compares less, and device damage is not too serious, under the continuous discharge mode, has only discharge electron number accumulative total in the continuous a few frame discharge image to reach certain numerical value and can think that just there are electric discharge phenomena in equipment.
Method of the present invention can be applied in the picture helicopter cruising inspection system, by gathering ultraviolet image the power equipment corona is carried out the real-time online detection, can detect power equipment ultraviolet discharge scenario in real time, real-time online carries out analyzing and diagnosing to the image of gathering, and whether definite transmission line of electricity exist defective, and the present invention has the efficient that can improve line walking, the characteristics that improve the defect diagonsis correctness.
Description of drawings
Fig. 1 is the original area and the extended area synoptic diagram of indication of the present invention;
Fig. 2 is the original image before the embodiment of the invention pre-service;
Fig. 3 is the pretreated image of the embodiment of the invention;
Fig. 4 be in the embodiment of the invention when get rid of not disturbing, the local-style dwelling houses erroneous judgement may be the image of corona discharge;
Fig. 5 be in the embodiment of the invention after get rid of disturbing, the local-style dwelling houses erroneous judgement can be the image of corona discharge;
Fig. 6 is the synoptic diagram of corona timing management structure in the embodiment of the invention;
Fig. 7 is first two field picture that detects sequence in the embodiment of the invention;
Fig. 8 is second two field picture that detects sequence in the embodiment of the invention;
Fig. 9 is the 3rd two field picture that detects sequence in the embodiment of the invention;
Figure 10 is the 4th two field picture that detects sequence in the embodiment of the invention;
Figure 11 is the 5th two field picture that detects sequence in the embodiment of the invention;
Figure 12 is the 6th two field picture that detects sequence in the embodiment of the invention.
Embodiment
Embodiment 1
Present embodiment is realized the detection in corona zone as follows:
Design a ultraviolet image collection and diagnostic software.Design collection that a button controls ultraviolet image and stop.When at first gathering ultraviolet image, ultraviolet image is transferred in the ultraviolet diagnostic module, begins to diagnose by equipment.
At first, ultraviolet image is read in the module of handling ultraviolet image in the software.Then, the view data of reading in is done pre-service, comprise gray processing, noise reduction process, binaryzation.Described binaryzation is meant that the visible images that will be superimposed with ultraviolet image carries out unified color range and expands to normalized image and handle, adopt unified luminance threshold thresholding to adjudicate, the luminance threshold thresholding is chosen between 235～245, the ultraviolet coloured image is converted into luminance picture, the judgement of employing luminance threshold, the bianry image of generation ultraviolet; It is the corona zone that " 1 " on the bianry image expresses possibility; " 0 " expression background area; Go out region of discharge with this Preliminary detection.On the pretreated binary map, adopting white portion is the corona zone, other be black, as shown in Figure 2, be the original image before the pre-service.Fig. 3 is pretreated image.Define a management structure that is used for storing the UV corona zone of each connection, claim that it is " Blob ".The property values such as coordinate that comprised each pixel in the coordinate up and down of the minimum boundary rectangle in corona zone, the area in corona zone (being the number of the shared pixel in corona zone), the corona zone in the structure " Blob ".
When handling, background field may be judged into by accident the corona zone, adopts pixel region management and the method for measuring, and the corona zone of erroneous judgement is rejected.Present embodiment is run into is the wall of white in resident's house.Because the geometric properties (square) of wall can judge whether that by the rectangle degree of fitting that calculates each corona zone this zone is not a noise, is real corona zone, as shown in Figure 4, for not getting rid of situation about disturbing, can produce erroneous judgement this moment; Fig. 5 is for getting rid of situation about disturbing, and can not be the corona zone with the local-style dwelling houses erroneous judgement this moment.
Simultaneously, according to the geometrical property of corona (because the corona zone generally all is a similar round).Then the ultraviolet binary map is scanned, the pixel that " 1 " is communicated with is formed a zone, further each regional shape is carried out two parameter measurements, measure each regional length breadth ratio, be evident as rectangular or wire, reject this zone; The circle of measuring each zone is like degree, as is evident as rectangle, utilizes the rectangle degree of fitting, and the ratio of the area boundary rectangle minimum with it by calculating each corona zone judges whether this zone is the corona zone.After above-mentioned all erroneous judgement corona zone rejectings, obtain judgement corona zone more accurately.
Then all qualified corona zones are deposited among the Blob.Owing to may still there be noise, do further judgement with adopting the ultraviolet bianry image after pixel region management and the method for measuring are handled, it all is self-existent finding to disturb, and real corona zone all is assemble closeer, a corona zone can not appear separately, general all is a bigger corona zone, also is accompanied by many little corona zones on every side.
First kind of situation is that circle is seemingly spent higher when the region area that record big (to 720 * 576 ultraviolet image, area has accounted for 1/4), in follow-up multiframe, have similar large area region again in the image access areas, can determine it is intermittent discharge, equipment deficiency is more serious; Second situation is that power equipment discharge exists certain distribution and directivity, on bianry image, show as in the certain area coverage that a plurality of zones roughly are distributed in image, and the discharge directivity may with component defect position and line of electric force, the installation position of insulator is relevant, for determining this distributed areas, at first finding out may be maximum corona zone, with this zone as unit area, in 8 neighborhoods around it, search for, further 24 neighborhoods around second level are searched for, determine whether there is little zone in the neighborhood, as there being many little zones in the neighborhood, the zone that can determine this maximum is the image at place, corona zone.
So by this characteristic, can do some again and limit and exclude some interference again.Based on the area of each Blob, whether with the expanded range that is used for judging 8 times of sizes to this Blob area, seeking in this determination range has other Blob to exist.Just do not think that independently the attribute of this Blob is set to independently if there is other Blob to exist; If have other Blob to exist, just think that this Blob meets the requirements.After all Blob are judged end, will delete all independently Blob structures at last.
Satisfactory ultraviolet binary map is carried out sequential follow the tracks of, a structure that is used for depositing the maximum corona zone on every two field picture is set, claim that it is Block.Be provided with one and be used for depositing each structure that independently appears at the maximum corona zone on the different frame image (this structure is corona timing management structure), claim that it is UvBlocks, comprised FrameNumber (it is 5 that FrameNumber is set in this enforcement) 5 maximum corona zone domain structures (i.e. the degree of depth of this structure) just.FrameNumber be judge circuit whether discharge before the frame number of image to be processed, as shown in Figure 6, be the synoptic diagram of UvBlock structure.Maximum corona zone domain structure has been stored the Blob (being the Blob of area maximum) of discharge capacity maximum in every two field picture.
When first two field picture was come in, if there is the corona zone, then the corona zone with maximum deposited in the interim maximum corona zone domain structure.Then, directly this Block structure is joined among the UvBlocks.
Each frame that arrives is subsequently equally at first set up an interim maximum corona zone domain structure, claims that it is tmpBlock.Upgrade each the maximum corona zone domain structure among the UvBlocks earlier.The mode of upgrading is: find the coordinate of boundary rectangle in each the maximum corona zone Domain Properties among the UvBlocks regional accordingly in present image, this regional location is enlarged 30 pixel sizes up and down, obtain a tracing area AREA ' (X
1, Y
1, X
2, Y
2)=AREA (X
1± 30, Y
1± 30, X
2± 30, Y
2± 30), wherein AREA ' is the zone after enlarging, and AREA is original zone, (X
1, Y
1), (X
2, Y
2) be the upper left corner in zone and the coordinate in the lower right corner.After expansion, if there is the corona zone on this position, then the photon number that this corona zone is comprised (being discharge capacity) joins on the photon number field of corresponding maximum corona zone domain structure, and upgrades the coordinate of the minimum boundary rectangle in this corona zone.This has also just finished the tracking of each maximum corona zone domain structure has been handled.
Judge whether then and will export judgement first the maximum corona zone domain structure among the UvBlocks.According to being, whether treated FrameNumber two field picture.If will judge then whether first structure exists electric discharge phenomena.If not, then do not judge, continue subsequent treatment.The foundation that judges whether to exist electric discharge phenomena is that whether (threshold value that adopts in the present embodiment is 100 greater than the thresholding Threshold that is provided with for accumulated discharge amount in first maximum corona zone domain structure (be UvBlocks[1]), for there being electric discharge phenomena on the cycle tests in the present embodiment), and the number of times that discharges in these treated two field pictures in this maximum corona zone also reaches default size.If condition all meets, then think discharge, and the output region of discharge.Otherwise, think that this zone do not discharge, and delete this structure.
When the output region of discharge, owing to, the minimum boundary rectangle in the zone that need be output exists discharge to be updated when following the tracks of at every turn, gets final product so only need basis to want the minimum boundary rectangle of output area to export, and is extremely shown in Figure 12 as Fig. 7.Be the tracking of native system to preceding 6 frames discharge image, judgement, output.Wherein, Fig. 7 to Figure 10 is the tracking that preceding 4 two field pictures is detected sequence, and Figure 11 is the judgement output to first two field picture (Fig. 7), for detecting the 5th two field picture of sequence; Figure 12 is the judgement output to second two field picture (Fig. 8), for detecting the 6th two field picture of sequence.
At last, judge whether the interim maximum corona zone domain structure tmpBlock that sets up before will add among the UvBlocks.Basis for estimation is if there be the structure (just coordinate that be minimum boundary rectangle close, think identical structure) close with tmpBlock among the UvBlocks, then not add.If there is no, then tmpBlock is added to the end of UvBlocks.To judge also before interpolation whether UvBlocks is full,, then delete first structure earlier, add again if full, otherwise, directly add.So also just finished detection to each frame ultraviolet image.
A plurality of region of discharges that present embodiment can be followed the tracks of on each two field picture simultaneously are meant for the situation that may have a plurality of region of discharges on every two field picture, can preserve a plurality of region of discharges, again sequential are carried out in the zone of each preservation and follow the tracks of, and detect output; Thereby realize a plurality of region of discharges on every frame ultraviolet image are detected.
Claims (10)
1. method of on ultraviolet image, seeking the power equipment discharge zone, it is characterized in that comprising the steps: at first gathering ultraviolet image, and ultraviolet image carried out pre-service, by the visible images that is superimposed on the ultraviolet image of gathering is handled, and then detect corona zone on the ultraviolet image, go out region of discharge with this Preliminary detection,, also will get rid of the interference of some backgrounds according to the characteristic in some corona zones then for every frame ultraviolet image; Whether follow the tracks of the equipment of determining in this zone by multiple image discharges; And can follow the tracks of a plurality of region of discharges on each two field picture simultaneously.
2. seek the method in power equipment discharge zone on the ultraviolet image as claimed in claim 1, it is characterized in that: described pre-service comprises gray processing, noise reduction process and binaryzation;
Wherein said noise reduction process is meant and adopts morphology 5 * 5 wave filters to carry out noise reduction process, deletes some little isolated noise points;
Described binaryzation is meant that the visible images that will be superimposed with ultraviolet image carries out unified color range and expands to normalized image and handle, adopt unified luminance threshold thresholding to adjudicate, the luminance threshold thresholding is chosen between 235～245, the ultraviolet coloured image is converted into luminance picture, the judgement of employing luminance threshold, the bianry image of generation ultraviolet; It is the corona zone that " 1 " on the bianry image expresses possibility; " 0 " expression background area; Go out region of discharge with this Preliminary detection.
3. seek the method in power equipment discharge zone on the ultraviolet image as claimed in claim 1, it is characterized in that: the method that described characteristic according to some corona zones is got rid of the interference of some backgrounds is meant according to the power equipment discharge zone has the corona zone generally to be rendered as big zone, be accompanied by some zonules on every side again, and general area is the characteristic of similar round, the ultraviolet bianry image that tentatively is judged as region of discharge is adopted pixel region management and the method for measuring, get rid of the interference of some backgrounds, the corona zone of erroneous judgement is rejected.
4. seek the method in power equipment discharge zone on the ultraviolet image as claimed in claim 3, it is characterized in that the method for described pixel region management is: at first use the rectangle degree of fitting to get rid of on the ultraviolet bianry image corona zone ineligible on some geometric configuratioies; Again each qualified corona zone is judged, the foundation of judging is the enlarged areas that this is regional, search in the areal extent that enlarges whether also have other corona zone, thereby judged whether this corona zone meets flash-over characteristic, the corona zone that does not meet flash-over characteristic is rejected; The method that described pixel region is measured is: the ultraviolet bianry image is scanned, the pixel that " 1 " is communicated with is formed a zone, after bianry image scanning, may produce a plurality of zones, further each regional shape is carried out two parameter measurements again, measure each regional length breadth ratio, be evident as rectangular or wire, reject this zone; Measure the circle in each zone and seemingly spend, as be evident as rectangle, reject this zone; After above-mentioned all erroneous judgement corona zone rejectings, obtain judgement corona zone more accurately.
5. seek the method in power equipment discharge zone on the ultraviolet image as claimed in claim 3, it is characterized in that: will adopt the ultraviolet bianry image after pixel region management and the method for measuring to divide following two kinds of situations to handle it, first kind of situation be when the region area that record bigger, circle is seemingly spent higher, in follow-up multiframe, have similar large area region again in the image access areas, can determine it is intermittent discharge, equipment deficiency is more serious; Second situation is that power equipment discharge exists certain distribution and directivity, on bianry image, show as in the certain area coverage that a plurality of zones roughly are distributed in image, and the discharge directivity may with component defect position and line of electric force, the installation position of insulator is relevant, for determining this distributed areas, at first finding out may be maximum corona zone, with this zone as unit area, in 8 neighborhoods around it, search for, further 24 neighborhoods around second level are searched for, determine whether there is little zone in the neighborhood, as there being many little zones in the neighborhood, the zone that can determine this maximum is the image at place, corona zone.
6. seek the method in power equipment discharge zone on the ultraviolet image as claimed in claim 1, it is characterized in that: describedly multiple image is followed the tracks of the equipment of determining in this zone whether discharge and be meant that the corona zone that will determine also needs to carry out sequential and follows the tracks of.
7. seek the method in power equipment discharge zone on the ultraviolet image as claimed in claim 6, it is characterized in that: described sequential is followed the tracks of and is meant and preserves maximum region of discharge in the image that there is maximum corona zone in first frame, after every two field picture in, judge whether this zone also exists discharge, as existing, just upgrade this regional discharge capacity, and the coordinate of minimum boundary rectangle that should the zone; When the frame number to this area tracking has reached the numerical value of presetting, just judge this zone discharge, export; Because during each the tracking, if there is discharge in the present image in tracked zone, will the coordinate of the minimum boundary rectangle in this zone be upgraded, so during output, as long as directly export this minimum boundary rectangle.
8. seek the method in power equipment discharge zone on the ultraviolet image as claimed in claim 7, it is characterized in that: the foundation of described default value setting is: discharge for the equipment on the line of electric force, follow the tracks of and handle how many two field pictures, just think to have reached the standard of judging; After having finished tracking, will judge this zone need judge whether this regional electron number has surpassed default threshold value, to judge also whether the number of times of this zone discharge has surpassed default threshold value; Just think to have discharged if surpassed, otherwise just think and do not discharge; Then region of discharge is exported.
9. seek the method in power equipment discharge zone on the ultraviolet image as claimed in claim 7, it is characterized in that: the coordinate of described minimum boundary rectangle that should the zone connects rectangular coordinates and respectively enlarges 30 picture numbers up and down for first maximum corona zone is overseas; This zone respectively enlarges 30 pixels up and down, obtains a tracing area AREA ' (X
1, Y
1, X
2, Y
2)=AREA (X
1± 30, Y
1± 30, X
2± 30, Y
2± 30), wherein AREA ' is the zone after enlarging, and AREA is original zone, (X
1, Y
1), (X
2, Y
2) be the upper left corner in zone and the coordinate in the lower right corner.
10. seek the method in power equipment discharge zone on the ultraviolet image as claimed in claim 1, it is characterized in that: described a plurality of region of discharges of following the tracks of simultaneously on each two field picture are meant for the situation that may have a plurality of region of discharges on every two field picture, can preserve a plurality of region of discharges, again sequential being carried out in the zone of each preservation follows the tracks of, detect output; Thereby realize a plurality of region of discharges on every frame ultraviolet image are detected.
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