CN105738364B - Silastic surface algal grown degree measurement method and device based on image procossing - Google Patents
Silastic surface algal grown degree measurement method and device based on image procossing Download PDFInfo
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Abstract
The invention discloses the silastic surface algal grown degree measurement method and devices based on image procossing, and this method comprises the following steps：S1, photo corresponding G component average value of the algae under different density is measured, establishes the functional relation of algae density and G component average values；S2, it takes pictures to the silicon rubber of the length algae, obtains the G component average values in algae region in photo, the density of the algae is calculated according to functional relation.This method avoids algae is removed from insulator surface, so as to avoid the significant errors brought during algae are taken；This method field conduct is only taken pictures, simple and practicable, no security risk, is adapted to varying environment, is met the requirement for safety, power supply reliability in power generation.The present invention reduces the difference because of photo color caused by the factors such as weather, illumination to the greatest extent using white balancing treatment method, to avoid the error of obtained algal grown degree is measured.
Description
【Technical field】
The present invention relates to high voltage and insulation technologies, especially relate to the silastic surface algal grown journey based on image procossing
Spend measurement method and device.
【Background technology】
Composite insulating material plays highly important because of its hydrophobicity performance outstanding in high voltage external insulation field
Effect.In ultra-high-tension power transmission line, the composite insulator being fabricated to composite insulating material is very common, its effect is that suspension is led
Line ensures reliably to insulate between the conducting wire of high potential and the shaft tower of ground potential；In substation, support insulator surface is also extensive
Spray booth temperature vulcanizable silicone rubber composite material.
The surface of composite insulating material is hydrophobic surface, significantly improves pollution flashover voltage, improves the reliability of insulator.
But there is growth in China Sichuan, Yunnan, Guangxi, Hunan isothermal Humid Area, composite insulator and insulation column RTV coating surfaces
The phenomenon that algae.On-the-spot test finds that the growth of algae can destroy the hydrophobicity of composite material surface, inhibit its Prevent from Dirt Flash
Ability.
Currently, the research of the algae for being grown in insulator surface more lacks both at home and abroad, for algae different
The research system not enough of the otherness of transmitting and transforming equipment outer surface growth etc., one of them is highly important the reason is that not
The suitable method for measuring insulator surface algal grown degree can be found.
It is that the algae of insulator surface the modes such as is scraped by washing or knife to remove to compare intuitive method, molten in water
It counts under the microscope afterwards, converses the quantity of the algae grown on outer surface of insulator unit area.The advantages of this method is
Intuitively, the disadvantage is that the algae adhesive force due to outer surface of insulator is very strong, the method being washed with water is difficult by the algae of silastic surface
Class is cleaned, and remaining algae is not easy to molten in water on the medium (such as gauze) washed, and causes very big error；And it is scraped using knife
Method, then be likely to destroy silastic surface.Ideal measurement method should can to avoid by algae from insulator surface
The step for taking off, to avoid the significant errors for taking algae process to bring.
【Invention content】
For overcome the deficiencies in the prior art, the present invention provides the silastic surface algal grown journeys based on image procossing
Measurement method and device are spent, it is more convenient, accurate to measure algal grown degree.
Silastic surface algal grown degree measurement method based on image procossing, includes the following steps：
S1, photo corresponding G component average value of the algae under different density is measured, establishes algae density and G components
The functional relation of average value；
S2, it takes pictures to the silicon rubber of the length algae, the G component average values in algae region in photo is obtained, according to described
The density of the algae is calculated in functional relation.
In one embodiment,
The step S1 includes the following steps：
S11, there is the silicone rubber plate of the algae of different densities to be placed under white background surface and is taken pictures to obtain original
Beginning photo；
S12, photo after white balance is handled is carried out to the original photo：
S121, the maximum pixel of brightness in the original photo, R, G and B of the maximum pixel of brightness are found
Component is respectively：Rmax、Gmax、Bmax；
S121, all pixels point of the original photo is handled as follows：
Wherein, RAAnd RBThe red component of each pixel after expression processing and before processing respectively, GAAnd GBTable respectively
Show after handling and handle the green component of each pixel before, BAAnd BBEach picture after expression processing and before processing respectively
The blue component of element, Rw、Gw、BwIt is red component, green component and the blue component of white；
S13, after treatment in photo, the difference for finding G components and R component is more than threshold value and the difference of G components and B component
The regional determination is the region of long algae more than the region of threshold value by value；
S14, calculate the long algae region G components average value.
In one embodiment,
In the step S1, algae is attached on silicone rubber plate as follows：
The pipe of both ends open is placed on the silicone rubber plate；
The algae solution of setting volume, density is added into the pipe；
The algae solution in the pipe is set to dry, algae is attached on the silicone rubber plate；
The density of the algae is calculated according to the cross-sectional area of the setting volume, setting density and the pipe.
In one embodiment,
In step s 2,
It will take pictures behind the algae side that is attached on the silicon rubber of tablet of white；
White balance processing is carried out to the photo that is obtained in the step S2, is calculated by algae in white balance treated photo
The G component average values in class region.
In one embodiment,
According to the algae area in step S2 described in the areal calculation of the white plates on silicon rubber.
The present invention also provides the silastic surface algal grown degree measurement devices based on image procossing, including such as place an order
Member：
First processing units establish algae for measuring the corresponding G components average value of photo of the algae under different density
The functional relation of class density and G component average values；
Second processing unit is taken pictures for the silicon rubber to the length algae, and the G components for obtaining algae region in photo are flat
The density of the algae is calculated according to the functional relation for mean value.
In one embodiment,
The first processing units are additionally operable to：
There is the silicone rubber plate of the algae of different densities to be placed under white background surface and is taken pictures to obtain original photograph
Piece；
Photo after white balance is handled is carried out to the original photo：
The maximum pixel of brightness in the original photo is found, R, G and B component of the maximum pixel of brightness divide
It is not：Rmax、Gmax、Bmax；
The all pixels point of the original photo is handled as follows：
Wherein, RAAnd RBThe red component of each pixel after expression processing and before processing respectively, GAAnd GBTable respectively
Show after handling and handle the green component of each pixel before, BAAnd BBEach picture after expression processing and before processing respectively
The blue component of element, Rw、Gw、BwIt is red component, green component and the blue component of white；
After treatment in photo, the difference for finding G components and R component is more than threshold value and the difference of G components and B component is big
In the region of threshold value, by the region that the regional determination is long algae；
Calculate the average value of the G components in the region of the long algae.
In one embodiment,
The first processing units are additionally operable to：
The pipe of both ends open is placed on the silicone rubber plate；
The algae solution of setting volume, density is added into the pipe；
The algae solution in the pipe is set to dry, algae is attached on the silicone rubber plate；
The density of the algae is calculated according to the cross-sectional area of the setting volume, setting density and the pipe.
The beneficial effects of the invention are as follows：The method that insulator surface algal grown degree is measured in the present invention is avoided from exhausted
The step for algae is removed in edge sublist face, so as to avoid the significant errors brought during algae are taken；This method field conduct is only
It takes pictures, simple and practicable, no security risk adapts to varying environment, meets reliable for safety, power supply in power generation
The requirement of property.
The present invention reduces the difference because of photo color caused by the factors such as weather, illumination to the greatest extent using white balancing treatment method
It is different, to avoid the error of obtained algal grown degree is measured.
【Description of the drawings】
Fig. 1 is the silastic surface algal grown degree measurement method based on image procossing of an embodiment of the present invention
Flow chart；
Fig. 2 is the silicon rubber test piece and the structural schematic diagram of pipe of an embodiment of the present invention.
【Specific implementation mode】
The following further describes in detail the preferred embodiments of the invention.
As shown in Figure 1, a kind of silastic surface algal grown degree measurement method based on image procossing, including walk as follows
Suddenly：
S1, photo corresponding G component average value of the algae under different density is measured, establishes algae density and G components
The functional relation of average value.This step can carry out in the lab.
S2, it takes pictures to the silicon rubber of the length algae, the G component average values in algae region in photo is obtained, according to described
The density of the algae is calculated in functional relation, to obtain the density of live silicon rubber insulator surface algae.
In one embodiment, step S1 may include steps of：
As shown in Fig. 2, the cylindrical tube 2 of a transparent both ends open is vertically fixed (referred to as in 1 upper surface of silicon rubber test piece
Pipe), pipe 2 and the junction RTV glue of silicon rubber test piece 1 seal.Silicon rubber test piece 1 and the size of pipe 2 are not wanted specifically
It asks, can be adjusted according to actual needs.Algae solution known to algae cell density is injected in pipe 2, after algae solution drying, algae
Class can uniformly be attached to silastic surface.The internal diameter of pipe 2 is D (unit cm), and the volume that algae solution is added is that (unit is V
Ml), the density of frustule is C (unit is a/ml) in algae solution, then the density for being attached to the algae on 1 surface of silicon rubber test piece is：
If the algae density wanted is larger, can be again added after algae solution drying in pipe 2, superposition attachment.It waits for
After algae solution drying, pipe 2 is removed, silicone rubber plate 1 is placed in white background, such as is placed on a blank sheet of paper, from surface
Vertical direction is taken pictures, and notices that camera, which is arranged, opens automatic white balance.Image is imported into computer, extracts each components of RGB therein,
Using total reflection theoretical algorithm, entire picture is done into the processing of software white balance, the specific method is as follows：
The maximum point of brightness in whole image is searched for first, and the maximum point of brightness here is defined as RGB three-components mutually in addition
The maximum pixel of numerical value, this point will appear in paper white area afterwards.Remember that the numerical value of its RGB three elements is respectively Rmax、Gmax、
Bmax.The RGB three elements of all pixels are done into following processing respectively later：
R in above formulaAAnd RBThe red component of each pixel after expression processing and before processing respectively, GAAnd GBRespectively
The green component of each pixel, B after expression processing and before processingAAnd BBIt is each after expression processing and before processing respectively
The blue component of pixel, Rw、Gw、BwIt is red component, green component and the blue component of white, which is generally 255 or few
Some, it is 250,250,250 that the value is arranged in the present invention.
The region of long algae is searched in above-mentioned treated picture.Since the color of this algae is green, long algae
Green can be significantly presented in the region of class, therefore for each pixel, if the difference of its green component and red component, and
When the difference of green component and blue component is more than some threshold value, just belong to the long algae region in the picture.According to design sketch come
The threshold value is adjusted, to reject environmental disturbances as possible.The average value for calculating the G components of the long algae region all pixels later, must
The G component average values under the algae density have been arrived, different long algae density and its G component average value have been fitted to get to its letter
Number relationship.
Step S2 may include steps of：
The insulator of shooting silicon rubber has grown the photo of the algae at the scene, in one embodiment, by known area
White plates (such as white paper) be attached to insulator surface and shoot together, the blank sheet of paper it is main it is used there are two, one
Camera white balance provides reference point when to shoot, and on the other hand provides area with reference to amount.Can be used for converting long algae area.With
The method of image white balance processing identical with S1 steps, finds long algae region, and the G components for calculating each pixel in the region are flat
After mean value, using the functional relation obtained in S1 steps, obtains actual long algae density and reality is conversed according to the area of blank sheet of paper
The long algae area on border.This completes for the long algae degree measurement of the insulator surface.
The above content is combining, specific embodiment is made for the present invention to be further described, and it cannot be said that this hair
Bright specific implementation is confined to these explanations.For those of ordinary skill in the art to which the present invention belongs, it is not taking off
Several alternative or obvious variations are made under the premise of from present inventive concept, and performance or use is identical, all shall be regarded as belonging to
Protection scope of the present invention.
Claims (6)
1. the silastic surface algal grown degree measurement method based on image procossing, characterized in that include the following steps：
S1, photo corresponding G component average value of the algae under different density is measured, it is average with G components establishes algae density
The functional relation of value；
S2, it takes pictures to the silicon rubber of the length algae, the G component average values in algae region in photo is obtained, according to the function
The density of the algae is calculated in relationship；
The step S1 includes the following steps：
S11, there is the silicone rubber plate of the algae of different densities to be placed under white background surface and is taken pictures to obtain original photograph
Piece；
S12, photo after white balance is handled is carried out to the original photo：
S121, the maximum pixel of brightness in the original photo, R, G and B component of the maximum pixel of brightness are found
Respectively：Rmax、Gmax、Bmax；
S122, all pixels point of the original photo is handled as follows：
Wherein, RAAnd RBThe red component of each pixel after expression processing and before processing respectively, GAAnd GBRespectively at expression
The green component of each pixel, B after reason and before processingAAnd BBEach pixel after expression processing and before processing respectively
Blue component, Rw、Gw、BwIt is red component, green component and the blue component of white；
S13, after treatment in photo, the difference for finding G components and R component is more than threshold value and the difference of G components and B component is big
In the region of threshold value, by the region that the regional determination is long algae；
S14, calculate the long algae region G components average value.
2. the silastic surface algal grown degree measurement method based on image procossing as described in claim 1, characterized in that
In the step S1, algae is attached on silicone rubber plate as follows：
The pipe of both ends open is placed on the silicone rubber plate；
The algae solution of setting volume, density is added into the pipe；
The algae solution in the pipe is set to dry, algae is attached on the silicone rubber plate；
The density of the algae is calculated according to the cross-sectional area of the setting volume, setting density and the pipe.
3. the silastic surface algal grown degree measurement method based on image procossing as described in claim 1, characterized in that
In step s 2,
It will take pictures behind the algae side that is attached on the silicon rubber of tablet of white；
White balance processing is carried out to the photo that is obtained in the step S2, is calculated by algae area in white balance treated photo
The G component average values in domain.
4. the silastic surface algal grown degree measurement method based on image procossing as claimed in claim 3, characterized in that
According to the algae area in step S2 described in the areal calculation of the white plates on silicon rubber.
5. the silastic surface algal grown degree measurement device based on image procossing, characterized in that including such as lower unit：
It is close to establish algae for measuring the corresponding G components average value of photo of the algae under different density for first processing units
The functional relation of degree and G component average values；
Second processing unit is taken pictures for the silicon rubber to the length algae, and the G components for obtaining algae region in photo are average
Value, the density of the algae is calculated according to the functional relation；
The first processing units are additionally operable to：
There is the silicone rubber plate of the algae of different densities to be placed under white background surface and is taken pictures to obtain original photo；
Photo after white balance is handled is carried out to the original photo：
Find the maximum pixel of brightness in the original photo, R, G and B component difference of the maximum pixel of brightness
For：Rmax、Gmax、Bmax；
The all pixels point of the original photo is handled as follows：
Wherein, RAAnd RBThe red component of each pixel after expression processing and before processing respectively, GAAnd GBRespectively at expression
The green component of each pixel, B after reason and before processingAAnd BBEach pixel after expression processing and before processing respectively
Blue component, Rw、Gw、BwIt is red component, green component and the blue component of white；
After treatment in photo, the difference of G components and R component is found more than threshold value and the difference of G components and B component is more than threshold
The region of value, by the region that the regional determination is long algae；
Calculate the average value of the G components in the region of the long algae.
6. the silastic surface algal grown degree measurement device based on image procossing as claimed in claim 5, characterized in that
The first processing units are additionally operable to：
The pipe of both ends open is placed on the silicone rubber plate；
The algae solution of setting volume, density is added into the pipe；
The algae solution in the pipe is set to dry, algae is attached on the silicone rubber plate；
The density of the algae is calculated according to the cross-sectional area of the setting volume, setting density and the pipe.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510992171.1A CN105738364B (en) | 2015-12-28 | 2015-12-28 | Silastic surface algal grown degree measurement method and device based on image procossing |
| PCT/CN2016/112805 WO2017114439A1 (en) | 2015-12-28 | 2016-12-28 | Image processing-based method and device for measuring growth degree of algae on silicone rubber surface |
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| CN201510992171.1A CN105738364B (en) | 2015-12-28 | 2015-12-28 | Silastic surface algal grown degree measurement method and device based on image procossing |
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| CN105738364B (en) * | 2015-12-28 | 2018-08-17 | 清华大学深圳研究生院 | Silastic surface algal grown degree measurement method and device based on image procossing |
| CN106501697A (en) * | 2016-10-20 | 2017-03-15 | 清华大学深圳研究生院 | A kind of environment simulator and method in charged insulating sublist face attached algae |
| ES2685220B1 (en) * | 2017-03-30 | 2019-10-21 | Univ Vigo | Method for estimating microalgal growth |
| CN107543821B (en) * | 2017-09-07 | 2020-05-05 | 国网四川省电力公司电力科学研究院 | Insulator algae growth degree assessment method |
| CN109242792B (en) * | 2018-08-23 | 2020-11-17 | 广东数相智能科技有限公司 | White balance correction method based on white object |
| CN110699415A (en) * | 2019-10-22 | 2020-01-17 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Ultraviolet treatment test method and device for algae on surface of silicone rubber |
| CN110823863A (en) * | 2019-10-31 | 2020-02-21 | 中国南方电网有限责任公司电网技术研究中心 | Method, device and equipment for detecting algae on surface of insulating material |
| CN111721269B (en) * | 2020-06-30 | 2021-01-05 | 扬州大学 | Quantitative evaluation method for pattern characteristics of wheat seedlings |
| CN111986201B (en) * | 2020-09-28 | 2023-12-22 | 南方电网科学研究院有限责任公司 | Method and device for measuring and calculating density of surface algae of insulator |
| CN113610768B (en) * | 2021-07-14 | 2024-08-16 | 南方电网科学研究院有限责任公司 | Method and device for measuring and calculating alga coverage rate on surface of insulator and storage medium |
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| WO2017114439A1 (en) | 2017-07-06 |
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