WO2017114439A1 - 基于图像处理的硅橡胶表面藻类生长程度测量方法及装置 - Google Patents
基于图像处理的硅橡胶表面藻类生长程度测量方法及装置 Download PDFInfo
- Publication number
- WO2017114439A1 WO2017114439A1 PCT/CN2016/112805 CN2016112805W WO2017114439A1 WO 2017114439 A1 WO2017114439 A1 WO 2017114439A1 CN 2016112805 W CN2016112805 W CN 2016112805W WO 2017114439 A1 WO2017114439 A1 WO 2017114439A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- algae
- component
- silicone rubber
- processing
- average value
- Prior art date
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C11/00—Photogrammetry or videogrammetry, e.g. stereogrammetry; Photographic surveying
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/40—Analysis of texture
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10024—Color image
Definitions
- the invention relates to a high voltage and insulation technology, in particular to a method and a device for measuring the growth degree of algae on the surface of a silicone rubber based on image processing.
- Composite insulation materials play an important role in the field of high voltage external insulation because of their outstanding hydrophobic properties.
- composite insulators made of composite insulating materials are very common. Its function is to suspend the wires to ensure reliable insulation between the high-potential conductors and the ground potential poles.
- the pillar insulator surfaces are also widely sprayed at room temperature. Vulcanized silicone rubber composite.
- the surface of the composite insulating material is a hydrophobic surface, which significantly increases the flashover voltage and improves the reliability of the insulator.
- the surface of the composite insulating material is a hydrophobic surface, which significantly increases the flashover voltage and improves the reliability of the insulator.
- a relatively straightforward method is to remove the algae on the surface of the insulator by water washing or knife scraping, dissolve it in water, and count it under a microscope to convert the amount of algae growing on the outer surface of the insulator.
- the advantage of this method is intuitive.
- the disadvantage is that the algae on the outer surface of the insulator has strong adhesion. It is difficult to wash the algae on the surface of the silicone rubber by washing with water, and the algae remaining on the washed medium (such as gauze) are not easily dissolved. In the water, it causes a lot of error; and with the knife scraping method, it is likely to damage the surface of the silicone rubber.
- the ideal measurement method should avoid the step of removing the algae from the surface of the insulator, thus avoiding the huge errors caused by the algae process.
- the present invention provides a method and a device for measuring the growth degree of algae on the surface of silicone rubber based on image processing, and measuring the growth degree of algae is more convenient and accurate.
- a method for measuring the growth degree of algae on the surface of silicone rubber based on image processing comprising the following steps:
- the step S1 includes the following steps:
- R A and R B represent the red component of each pixel after processing and before processing, respectively, and G A and G B represent the green component of each pixel after processing and before processing, respectively, and B A and B B respectively represent after processing And processing the blue component of each pixel before, R w , G w , B w are white red component, green component and blue component;
- step S1 the algae is attached to the silicone rubber sheet by the following steps:
- the density of the algae is calculated based on the set volume, the set density, and the cross-sectional area of the tube.
- step S2
- the photograph obtained in the step S2 is subjected to white balance processing, and the average value of the G component of the algae region in the photograph after the white balance processing is calculated.
- the area of the algae on the silicone rubber in the step S2 is calculated from the area of the white sheet.
- the invention also provides an apparatus for measuring algae growth degree of silicone rubber surface based on image processing, comprising the following units:
- a first processing unit for measuring an average value of the G component corresponding to the photograph of the algae at different densities, and establishing a function relationship between the algae density and the average value of the G component;
- the second processing unit is configured to photograph the silicone rubber of the algae, obtain an average value of the G component of the algae region in the photograph, and calculate the density of the algae according to the functional relationship.
- the first processing unit is further configured to:
- a silicone rubber sheet having algae having different densities on the surface is placed on a white background and photographed to obtain an original photograph;
- Finding the pixel with the highest brightness in the original photo, and the R, G, and B components of the pixel with the highest brightness are: R max , G max , B max ;
- R A and R B respectively represent red components of each pixel after processing and before processing
- G A and G B represent green components of each pixel after processing and before processing
- B A and B B respectively represent after processing And processing the blue component of each pixel before
- R w , G w , B w are white red component, green component and blue component;
- the average value of the G component of the region of the long algae is calculated.
- the first processing unit is further configured to:
- the density of the algae is calculated based on the set volume, the set density, and the cross-sectional area of the tube.
- the invention has the beneficial effects that the method for measuring the growth degree of algae on the surface of the insulator in the invention avoids the step of removing the algae from the surface of the insulator, thereby avoiding the huge error caused by the algae removal process; Photographing, simple and easy, no safety hazards, adapt to different environments, meet the requirements for safety and power supply reliability in power production.
- the invention utilizes the white balance processing method to minimize the difference of the color of the photos caused by the weather, the illumination and the like, so as to avoid the error of the measured growth degree of the algae.
- FIG. 1 is a flow chart of a method for measuring algae growth degree on a surface of a silicone rubber based on image processing according to an embodiment of the present invention
- FIG. 2 is a schematic view showing the structure of a silicone rubber test piece and a round pipe according to an embodiment of the present invention.
- step S1 may include the following steps:
- the upper surface of the silicone rubber test piece 1 is vertically fixed with a transparent cylindrical tube 2 (referred to as a circular tube) which is open at both ends, and the joint of the tube 2 and the silicone rubber test piece 1 is sealed with RTV rubber.
- a transparent cylindrical tube 2 referred to as a circular tube
- the dimensions of the silicone rubber test piece 1 and the round tube 2 are not specifically required, and can be adjusted according to actual needs.
- the algae liquid having a known algae cell density is injected into the round tube 2, and after the algae liquid is dried, the algae uniformly adheres to the surface of the silicone rubber.
- the inner diameter of the round tube 2 is D (unit: cm), the volume of the algae solution added is V (unit is ml), and the density of algal cells in the algae liquid is C (unit is /ml), and it is attached to the silicone rubber test piece.
- the density of algae on the surface is:
- the algae liquid in the round tube 2 may be dried, added again, and superposed and attached. After the algae liquid is dried, the round tube 2 is removed, and the silicone rubber sheet 1 is placed on a white background, for example, placed on a piece of white paper, and photographed vertically from the upper side, taking care to set the camera to turn on the automatic white balance. Import the image into the computer, extract the RGB components, and use the total reflection theory algorithm to do the software white balance processing.
- the specific method is as follows:
- the point with the highest brightness in the entire image is searched, where the point with the highest brightness is defined as the pixel with the largest value after the RGB three components are added, which will appear in the white paper area.
- the values of the three elements of red, green and blue are R max , G max and B max , respectively .
- the red, green and blue elements of all pixels are treated as follows:
- R A and R B represent the red component of each pixel after processing and before processing, respectively, and G A and G B represent the green component of each pixel after processing and before processing, respectively, and B A and B B represent processing, respectively.
- R w , G w , B w are white red component, green component and blue component, and the value is generally 255 or less, and the value is set in the present invention to 250. 250, 250.
- the area of the long algae in the processed image Search for the area of the long algae in the processed image above. Since the color of the algae is green, the area of the long algae will appear green, so for each pixel, if the difference between the green component and the red component, and the difference between the green component and the blue component is greater than a certain threshold It belongs to the long algae area in the picture. Adjust the threshold according to the rendering to minimize environmental interference. Then, the average value of the G components of all the pixels in the long algae region is calculated, and the average value of the G component at the density of the algae is obtained, and the difference between the density of the different long algae and the average value of the G component is obtained, that is, the functional relationship is obtained.
- Step S2 may include the following steps:
- the insulator of the silicone rubber is photographed on site to lengthen the photograph of the algae.
- a white sheet of a known area for example, white paper
- white paper There are two, one of which provides a reference point for camera white balance when shooting, and an area reference amount on the other hand.
- the long algae region is found, and the average value of the G component of each pixel in the region is calculated, and then the actual long algae density is obtained by using the function relationship obtained in the step S1, according to the white
- the area of the paper is converted into the actual area of the long algae. This completes the measurement of the degree of algae on the surface of the insulator.
Landscapes
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Immunology (AREA)
- Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Pathology (AREA)
- Analytical Chemistry (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Theoretical Computer Science (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Multimedia (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Laminated Bodies (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
Claims (8)
- 基于图像处理的硅橡胶表面藻类生长程度测量方法,其特征是,包括如下步骤:S1、测量藻类在不同的密度下的照片对应的G分量平均值,建立藻类密度与G分量平均值的函数关系;S2、对长所述藻类的硅橡胶拍照,获得照片中藻类区域的G分量平均值,根据所述函数关系计算得到所述藻类的密度。
- 如权利要求1所述的基于图像处理的硅橡胶表面藻类生长程度测量方法,其特征是,所述步骤S1包括如下步骤:S11、将表面具有不同密度的藻类的硅橡胶片放在白色背景下并进行拍照得到原始照片;S12、对所述原始照片进行白平衡处理得到处理后照片:S121、寻找所述原始照片中亮度最大的像素点,所述亮度最大的像素点的R、G和B分量分别为:Rmax、Gmax、Bmax;S121、对所述原始照片的所有像素点进行如下处理:其中,RA和RB分别表示处理之后和处理之前的每个像素的红色分量,GA和GB分别表示处理之后和处理之前每个像素的绿色分量,BA和BB分别表示处理之后和处理之前每个像素的蓝色分量,Rw、Gw、Bw是白色的红色分量、绿色分量和蓝色分量;S13、在处理后照片中,找到G分量与R分量的差值大于阈值、且G分量与B分量的差值大于阈值的区域,将所述区域判定为长藻类的区域;S14、计算所述长藻类的区域的G分量的平均值。
- 如权利要求2所述的基于图像处理的硅橡胶表面藻类生长程度测量方法,其特征是,在所述步骤S1中,通过如下步骤将藻类附着在硅橡胶片上:将两端开口的管放置在所述硅橡胶片上;向所述管内加入设定体积、密度的藻类溶液;使所述管内的藻类溶液干燥,藻类即附着在所述硅橡胶片上;根据所述设定体积、设定密度以及所述管的横截面积计算所述藻类的密度。
- 如权利要求2所述的基于图像处理的硅橡胶表面藻类生长程度测量方法,其特征是,在步骤S2中,将白色的片状物附着在所述硅橡胶上的藻类旁后进行拍照;对所述步骤S2中获得的照片进行白平衡处理,计算经过白平衡处理后的照片中藻类区域的G分量平均值。
- 如权利要求4所述的基于图像处理的硅橡胶表面藻类生长程度测量方法,其特征是,根据所述白色片状物的面积计算所述步骤S2中硅橡胶上的藻类面积。
- 基于图像处理的硅橡胶表面藻类生长程度测量装置,其特征是,包括如下单元:第一处理单元,用于测量藻类在不同的密度下的照片对应的G分量平均值,建立藻类密度与G分量平均值的函数关系;第二处理单元,用于对长所述藻类的硅橡胶拍照,获得照片中藻类区域的G分量平均值,根据所述函数关系计算得到所述藻类的密度。
- 如权利要求6所述的基于图像处理的硅橡胶表面藻类生长程度测量装置,其特征是,所述第一处理单元还用于:将表面具有不同密度的藻类的硅橡胶片放在白色背景下并进行拍照得到原始照片;对所述原始照片进行白平衡处理得到处理后照片:寻找所述原始照片中亮度最大的像素点,所述亮度最大的像素点的R、G和B分量分别为:Rmax、Gmax、Bmax;对所述原始照片的所有像素点进行如下处理:其中,RA和RB分别表示处理之后和处理之前的每个像素的红色分量,GA和GB分别表示处理之后和处理之前每个像素的绿色分量,BA和BB分别表示处理之后和处理之前每个像素的蓝色分量,Rw、Gw、Bw是白色的红色分量、绿色分量和蓝色分量;在处理后照片中,找到G分量与R分量的差值大于阈值、且G分量与B分量的差值大于阈值的区域,将所述区域判定为长藻类的区域;计算所述长藻类的区域的G分量的平均值。
- 如权利要求7所述的基于图像处理的硅橡胶表面藻类生长程度测量装置,其特征是,所述第一处理单元还用于:将两端开口的管放置在所述硅橡胶片上;向所述管内加入设定体积、密度的藻类溶液;使所述管内的藻类溶液干燥,藻类即附着在所述硅橡胶片上;根据所述设定体积、设定密度以及所述管的横截面积计算所述藻类的密度。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201510992171.1 | 2015-12-28 | ||
CN201510992171.1A CN105738364B (zh) | 2015-12-28 | 2015-12-28 | 基于图像处理的硅橡胶表面藻类生长程度测量方法及装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2017114439A1 true WO2017114439A1 (zh) | 2017-07-06 |
Family
ID=56296336
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2016/112805 WO2017114439A1 (zh) | 2015-12-28 | 2016-12-28 | 基于图像处理的硅橡胶表面藻类生长程度测量方法及装置 |
Country Status (2)
Country | Link |
---|---|
CN (1) | CN105738364B (zh) |
WO (1) | WO2017114439A1 (zh) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105738364B (zh) * | 2015-12-28 | 2018-08-17 | 清华大学深圳研究生院 | 基于图像处理的硅橡胶表面藻类生长程度测量方法及装置 |
CN106501697A (zh) * | 2016-10-20 | 2017-03-15 | 清华大学深圳研究生院 | 一种用于在带电绝缘子表面着生藻类的环境模拟装置及方法 |
ES2685220B1 (es) * | 2017-03-30 | 2019-10-21 | Univ Vigo | Método para la estimación del crecimiento microalgal |
CN107543821B (zh) * | 2017-09-07 | 2020-05-05 | 国网四川省电力公司电力科学研究院 | 一种绝缘子藻类生长程度评估方法 |
CN109242792B (zh) * | 2018-08-23 | 2020-11-17 | 广东数相智能科技有限公司 | 一种基于白色物体的白平衡校对方法 |
CN110699415A (zh) * | 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 | 一种硅橡胶表面藻类的紫外线处理试验方法及其装置 |
CN110823863A (zh) * | 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 | 一种绝缘材料表面的藻类检测方法、装置和设备 |
CN111721269B (zh) * | 2020-06-30 | 2021-01-05 | 扬州大学 | 一种小麦幼苗格局特征的量化评价方法 |
CN111986201B (zh) * | 2020-09-28 | 2023-12-22 | 南方电网科学研究院有限责任公司 | 一种绝缘子的表面藻类密度的测算方法和装置 |
CN113610768B (zh) * | 2021-07-14 | 2024-08-16 | 南方电网科学研究院有限责任公司 | 绝缘子表面藻类覆盖率测算方法、装置及存储介质 |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102517372A (zh) * | 2011-12-09 | 2012-06-27 | 厦门大学 | 一种微藻胞内油脂含量的快速测定方法 |
CN102945505A (zh) * | 2012-11-17 | 2013-02-27 | 中国水产科学研究院渔业机械仪器研究所 | 一种小球藻自动计数方法 |
CN103048330A (zh) * | 2012-12-18 | 2013-04-17 | 河海大学常州校区 | 一种水下构建物表面裂缝可视化探测装置 |
CN103955937A (zh) * | 2014-05-15 | 2014-07-30 | 福州大学 | 基于数字图像处理微藻自动计数方法 |
JP2014202649A (ja) * | 2013-04-08 | 2014-10-27 | 日本電信電話株式会社 | 微細藻類の濃度決定方法、装置およびプログラム |
JP2015049227A (ja) * | 2013-09-04 | 2015-03-16 | 独立行政法人国立高等専門学校機構 | 大型藻類の生育診断装置及び大型藻類の生育診断方法 |
CN104794710A (zh) * | 2015-04-13 | 2015-07-22 | 上海泽煜实验设备有限公司 | 一种图像处理方法及装置 |
CN105738364A (zh) * | 2015-12-28 | 2016-07-06 | 清华大学深圳研究生院 | 基于图像处理的硅橡胶表面藻类生长程度测量方法及装置 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102592140A (zh) * | 2012-01-04 | 2012-07-18 | 上海理工大学 | 一种蓝藻水华状态监测方法 |
CN103955938B (zh) * | 2014-05-15 | 2017-03-08 | 安徽农业大学 | 一种基于移动互联网模式和叶片颜色分析的小麦生长状态诊断方法 |
CN105115941B (zh) * | 2015-09-30 | 2017-09-12 | 国家海洋局南海预报中心 | 一种提取复杂水体叶绿素浓度分布信息的遥感反演方法 |
-
2015
- 2015-12-28 CN CN201510992171.1A patent/CN105738364B/zh not_active Expired - Fee Related
-
2016
- 2016-12-28 WO PCT/CN2016/112805 patent/WO2017114439A1/zh active Application Filing
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102517372A (zh) * | 2011-12-09 | 2012-06-27 | 厦门大学 | 一种微藻胞内油脂含量的快速测定方法 |
CN102945505A (zh) * | 2012-11-17 | 2013-02-27 | 中国水产科学研究院渔业机械仪器研究所 | 一种小球藻自动计数方法 |
CN103048330A (zh) * | 2012-12-18 | 2013-04-17 | 河海大学常州校区 | 一种水下构建物表面裂缝可视化探测装置 |
JP2014202649A (ja) * | 2013-04-08 | 2014-10-27 | 日本電信電話株式会社 | 微細藻類の濃度決定方法、装置およびプログラム |
JP2015049227A (ja) * | 2013-09-04 | 2015-03-16 | 独立行政法人国立高等専門学校機構 | 大型藻類の生育診断装置及び大型藻類の生育診断方法 |
CN103955937A (zh) * | 2014-05-15 | 2014-07-30 | 福州大学 | 基于数字图像处理微藻自动计数方法 |
CN104794710A (zh) * | 2015-04-13 | 2015-07-22 | 上海泽煜实验设备有限公司 | 一种图像处理方法及装置 |
CN105738364A (zh) * | 2015-12-28 | 2016-07-06 | 清华大学深圳研究生院 | 基于图像处理的硅橡胶表面藻类生长程度测量方法及装置 |
Also Published As
Publication number | Publication date |
---|---|
CN105738364B (zh) | 2018-08-17 |
CN105738364A (zh) | 2016-07-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2017114439A1 (zh) | 基于图像处理的硅橡胶表面藻类生长程度测量方法及装置 | |
Jin et al. | Condition evaluation of the contaminated insulators by visible light images assisted with infrared information | |
CN102520323B (zh) | 基于高光谱的复合绝缘子老化运行状态检测方法 | |
WO2021052022A1 (zh) | 电缆的振动检测方法及相关产品 | |
WO2021056953A1 (zh) | 监测混凝土构件内部水分传输的ect传感器、系统及工艺 | |
Jiang et al. | DC flashover performance and effect of sheds configuration on polluted and ice–covered composite insulators at low atmospheric pressure | |
CN103040466B (zh) | 一种电阻抗检测用电极连接异常的检测方法 | |
CN103163181A (zh) | 基于建筑外景红外图像的热工区域自动识别方法 | |
CN102519846B (zh) | 基于高光谱的复合绝缘子憎水性检测方法 | |
WO2014146222A1 (zh) | 基于红外图像的建筑热工指标的自动检测方法 | |
CN107464233B (zh) | 基于Lab颜色模式的复合绝缘子的图像检测方法及系统 | |
CN109164513A (zh) | 基于葵花气象卫星的台风定位检测方法 | |
CN111986201B (zh) | 一种绝缘子的表面藻类密度的测算方法和装置 | |
CN108776145B (zh) | 一种绝缘子掉串故障检测方法及系统 | |
CN106443276B (zh) | 一种交流高压多回输电线路无线电干扰计算方法及系统 | |
CN102519974B (zh) | 基于图像智能识别的复合绝缘子龟裂检测方法 | |
CN105021119B (zh) | 基于石墨烯复合薄膜材料的层状结构应变传感器及其制造 | |
CN104809727B (zh) | 一种输电导线覆冰形状的自动识别方法 | |
CN109559306B (zh) | 基于边缘检测的交联聚乙烯绝缘层表面平整性检测方法 | |
US8725430B2 (en) | Method and apparatus for determining structural damage depth, and method and apparatus for determining structural damage treatment | |
CN103604755A (zh) | 硅橡胶复合绝缘子伞裙老化检测方法 | |
CN105803623A (zh) | 一种复合材料细观结构的计算机图形识别方法 | |
CN103218781B (zh) | 一种对图像进行空间滤波处理的方法和装置 | |
CN116773531A (zh) | 一种建筑物热工性能检测方法、系统、电子设备及介质 | |
CN110093663A (zh) | 一种用于晶体直径测量的自动校准方法及校准系统 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 16881228 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 16881228 Country of ref document: EP Kind code of ref document: A1 |
|
32PN | Ep: public notification in the ep bulletin as address of the adressee cannot be established |
Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 13.03.2019) |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 16881228 Country of ref document: EP Kind code of ref document: A1 |