CN106768155A - The method that water level is measured using image procossing - Google Patents
The method that water level is measured using image procossing Download PDFInfo
- Publication number
- CN106768155A CN106768155A CN201611196614.7A CN201611196614A CN106768155A CN 106768155 A CN106768155 A CN 106768155A CN 201611196614 A CN201611196614 A CN 201611196614A CN 106768155 A CN106768155 A CN 106768155A
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- Prior art keywords
- water gauge
- height
- water
- camera
- gauge
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
Abstract
The present invention is included using the method that image procossing measures water level：Water gauge image is extracted in the water gauge photo captured by camera, inclined water gauge is rotated, make water gauge in vertical position in the images, then rectangle is connect in the minimum of interception water gauge in the picture, obtain correction chart picture, in correction chart picture, the gray value of a row grid in rectangle is connect in the minimum of read water gauge, the gray value of each grid is compared with the gray value of adjacent mesh, draw one group of data, this group of maximum value of data is found out with two adjacent grids corresponding to the absolute value, a straight line perpendicular to water gauge is marked between the adjacent grid of above-mentioned two, that is waterline；Height h of the water gauge in correction chart picture is measured, waterline is located at the height h of correction image base1, according to formula l1=( l*h1)/h, calculates the height l of actual water level1, wherein l is the actual height of known water gauge, and the inventive method possesses good trackability.
Description
Technical field
The present invention relates to a kind of method that use image procossing measures water level, particularly target water gauge is utilized for one kind
Level measuring is carried out with reference to the method for image procossing, so as to obtain the processing method of real time water level.
Background technology
It is general in level measuring that the trackability in Ultrasonic data source is poor by the way of ultrasonic measurement, and mesh
It is preceding to need to review historical data in level measuring, therefore the mode of introducing image procossing carries out level measuring, in reality
While existing level measuring, possesses good trackability.
The content of the invention
Present invention purpose is to provide a kind of method that water level is measured using image procossing, is there is measurement water gauge
In the case of carry out real time water level measuring method, the method can vertically lay a water gauge in water, over there dispose one
Camera, the image of water gauge is shot by camera, and waterline is measured by image recognition, and water level is gone out with reference to the high computational of water gauge
Actual height.
In order to complete present invention purpose, the application uses following technical scheme：
The method that water level is measured using image procossing of the invention, the method is comprised the following steps：
1）Placement has the water gauge of one fixed width vertically in riverbed, by one camera of camera bar fixed placement on riverbank,
Camera fields of view scope is set to cover the whole height of water gauge, camera alignment water gauge shoot and obtains water gauge photo;
Wherein：
2）Water gauge image is extracted in the water gauge photo captured by camera, inclined water gauge is rotated, make water gauge in the figure
It is in vertical position as in, rectangle then is connect in the minimum of interception water gauge in the picture, correction chart picture is obtained, in correction chart picture
In, the gray value of a row grid in rectangle is connect in the minimum of read water gauge, by the gray value of each grid and the ash of adjacent mesh
Angle value is compared, and draws one group of data, finds out this group of maximum value of data and two corresponding to the absolute value adjacent
Grid, a straight line perpendicular to water gauge, i.e. waterline are marked between the adjacent grid of above-mentioned two；
3）Height h of the water gauge in correction chart picture is measured, waterline is located at the height h of correction image base1, according to formula
l1=( l*h1)/h, calculates the height l of actual water level1, wherein l is the actual height of known water gauge.
Level measuring is carried out invention introduces the mode of image procossing, while level measuring is realized, possesses good
Good trackability.
Brief description of the drawings
Fig. 1 is the schematic diagram of water gauge and the camera installation site in riverbed and riverbank；
Fig. 2 is the water gauge photo captured by camera, and the figure is the true figure captured by camera；
Fig. 3 is the schematic diagram of the water gauge image intercepted from Fig. 2；
Fig. 4 is the schematic diagram that Fig. 3 process post-equalization image.
In Fig. 1 to Fig. 4, label 1 is water gauge；Label 2 is camera；Label 3 is camera bar；Label 4 is riverbank；Label 5
It is riverbed；Label 6 is waterline.
Specific embodiment
A kind of method that water level is measured using image procossing of the present invention, the method is comprised the following steps：
1）Shown in Fig. 1, placement has the water gauge 1 of one fixed width vertically in riverbed 5, is fixed by camera bar 3 on riverbank 4
A camera 2 is placed, the field range of camera 2 is covered the whole height of water gauge 1, the alignment water gauge 1 of camera 2 shoot obtaining water
Chi photo（That is Fig. 2）;
2）In the water gauge photo captured by camera 2（That is Fig. 2）The middle extraction image of water gauge 1（As shown in Figure 3）, to inclined water gauge 1
Rotated, make water gauge 1 in vertical position in the images, then connect rectangle in the minimum of interception water gauge 1 in the picture, obtained
To correction chart picture as shown in Figure 4, in correction chart picture, the gray value of a row grid in rectangle is connect in the minimum of read water gauge 1,
The gray value of each grid is compared with the gray value of adjacent mesh, one group of data is drawn, this group of maximum of data is found out
Absolute value and two adjacent grids corresponding to the absolute value, marked between the adjacent grid of above-mentioned two one perpendicular to
The straight line of water gauge 1, i.e. waterline 6；
3）Water gauge 1 is measured in correction chart picture（That is Fig. 4）In height h, waterline 6 be located at correction image base height h1,
According to formula l1=( l*h1)/h, calculates the height l of actual water level1, wherein l is the actual height of known water gauge 1.
Above description is explanation of the invention, is not the restriction to inventing, and limited range of the present invention is referring to right
It is required that, in the case of without prejudice to spirit of the invention, the present invention can make any type of modification.
Claims (1)
1. a kind of method that use image procossing measures water level, the method is comprised the following steps：
In riverbed（5）In vertically placement with one fixed width water gauge（1）, on riverbank（4）On by camera bar（3）Fixed placement
One camera（2）, make camera（2）Field range covers water gauge（1）Whole height, camera（2）Alignment water gauge（1）Shot
Obtain water gauge photo;
It is characterized in that：
In camera（2）Water gauge is extracted in captured water gauge photo（1）Image, to inclined water gauge（1）Rotated, made water gauge
（1）It is in vertical position in the images, water gauge is then intercepted in the picture（1）Minimum in connect rectangle, obtain correction chart picture,
In correction chart picture, read water gauge（1）Minimum in connect the gray value of a row grid in rectangle, by the gray value of each grid and
The gray value of adjacent mesh is compared, and draws one group of data, finds out this group of maximum value of data and the absolute value is right
The two adjacent grids answered, mark one perpendicular to water gauge between the adjacent grid of above-mentioned two（1）Straight line, i.e. water level
Line（6）；
Measure water gauge（1）Height h in correction chart picture, waterline（6）Positioned at the height h of correction image base1, according to public affairs
Formula l1=( l*h1)/h, calculates the height l of actual water level1, wherein l is known water gauge（1）Actual height.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611196614.7A CN106768155A (en) | 2016-12-22 | 2016-12-22 | The method that water level is measured using image procossing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611196614.7A CN106768155A (en) | 2016-12-22 | 2016-12-22 | The method that water level is measured using image procossing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106768155A true CN106768155A (en) | 2017-05-31 |
Family
ID=58899541
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611196614.7A Withdrawn CN106768155A (en) | 2016-12-22 | 2016-12-22 | The method that water level is measured using image procossing |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107588823A (en) * | 2017-09-18 | 2018-01-16 | 河海大学 | Water gauge water level measurement method based on dual-waveband imaging |
| CN108423136A (en) * | 2018-02-27 | 2018-08-21 | 力鸿智信（北京）科技有限公司 | A kind of ship pay load determines method and device |
| CN110686750A (en) * | 2018-07-05 | 2020-01-14 | 杭州海康威视数字技术股份有限公司 | Water level detection method, device and system |
| CN111652089A (en) * | 2020-05-18 | 2020-09-11 | 纪义胜 | Water level automatic identification method and system based on image processing |
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| CN201600164U (en) * | 2009-12-29 | 2010-10-06 | 新疆信通水利电子有限公司 | Video water-level gauge |
| CN101886942A (en) * | 2010-06-23 | 2010-11-17 | 江苏大学 | Water gauge marking method and water level detection method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107588823A (en) * | 2017-09-18 | 2018-01-16 | 河海大学 | Water gauge water level measurement method based on dual-waveband imaging |
| CN108423136A (en) * | 2018-02-27 | 2018-08-21 | 力鸿智信（北京）科技有限公司 | A kind of ship pay load determines method and device |
| CN108423136B (en) * | 2018-02-27 | 2019-11-05 | 力鸿智信（北京）科技有限公司 | A kind of ship pay load determines method and device |
| CN110686750A (en) * | 2018-07-05 | 2020-01-14 | 杭州海康威视数字技术股份有限公司 | Water level detection method, device and system |
| CN111652089A (en) * | 2020-05-18 | 2020-09-11 | 纪义胜 | Water level automatic identification method and system based on image processing |
| CN111652089B (en) * | 2020-05-18 | 2023-09-19 | 纪义胜 | Automatic water level identification method and system based on image processing |
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Application publication date: 20170531 |
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