CN111141684A - Ocean oil spill detection method based on visible light/infrared polarization characteristics - Google Patents
Ocean oil spill detection method based on visible light/infrared polarization characteristics Download PDFInfo
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- CN111141684A CN111141684A CN202010101468.5A CN202010101468A CN111141684A CN 111141684 A CN111141684 A CN 111141684A CN 202010101468 A CN202010101468 A CN 202010101468A CN 111141684 A CN111141684 A CN 111141684A
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- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
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Abstract
The invention relates to a visible light/infrared polarization characteristic-based marine oil spill detection method, which belongs to the technical field of photoelectric imaging and comprises the following steps of firstly, setting up a visible light/infrared oil spill polarization imaging test device outdoors, and determining the environmental condition of a position to be detected; secondly, visible light/infrared polarization characteristic images of seawater, heavy oil, palm oil, crude oil, gasoline and diesel oil are obtained under the conditions of downward shooting and side shooting respectively through the built visible light/infrared oil spill polarization imaging test device; analyzing the gray value of the obtained image, analyzing and comparing the polarization characteristic difference of different oil types to obtain the polarization characteristic parameters of different oil types; and step four, judging the information of the environment to be detected according to the obtained polarization characteristic parameters to obtain the marine oil spill situation, and comparing and analyzing the visible light/infrared polarization characteristics of the marine common oil spill by combining the intensity detection and the polarization detection to realize the distinguishing of the oil spill types.
Description
Technical Field
The invention belongs to the technical field of photoelectric imaging, and particularly relates to a method for detecting visible light/infrared polarization characteristics of marine oil spill.
Background
With the continuous development of marine economy, oil spill disasters and accidents caused by marine oil and gas exploitation and transportation frequently occur, the oil spill disasters and the accidents become main disaster types threatening the ecological safety of oceans, and the research and the treatment of marine oil spill pollution are widely concerned in the world.
At present, the technical means for detecting the oil spill comprise a satellite remote sensing technology, a hyperspectral remote sensing technology, a visible light detection technology, an infrared remote sensing technology, a laser induced fluorescence technology, an ultraviolet detection technology and the like. Satellite remote sensing is mainly realized by Synthetic Aperture Radar (SAR), and the SAR has strong penetrability and high spatial resolution, but is easily influenced by atmosphere and has poor real-time performance; the hyperspectral remote sensing has very high spectral resolution and has a good effect on ground object identification. Data redundancy is easily caused, dimension reduction and denoising processing needs to be carried out on the data, and the workload is increased; the visible light detection has the characteristics of high information acquisition energy and suitability for human eye observation during daytime observation, but is greatly influenced by weather conditions, and the imaging effect is not good during night observation; although the problem of poor observation effect at night is solved along with the development and application of the infrared technology, when an oil layer is thin, the temperature difference between the spilled oil and the seawater is not obvious, and the sea surface spilled oil detection cannot be effectively realized by comparing the temperature difference between the sea surface spilled oil and the seawater. In addition, the method is difficult to identify the type of the oil product which overflows, has great limitation on applicability, and cannot provide effective technical support for the treatment of oil overflow disasters. Therefore, there is a need in the art for a new solution to solve this problem.
This patent is based on intensity detection to present ocean oil spill detection mode mostly, and discernment false alarm rate is high, and data is single, and it is big to handle data work load, and the real-time is poor, easily receives environmental impact and is difficult to distinguish oil spill kind scheduling problem. The method is based on the traditional intensity detection, and detects and identifies the ocean oil spill by combining the intensity detection with the polarization detection. And comparing and analyzing the visible light/infrared polarization characteristics of the common marine spilled oil, distinguishing the types of the spilled oil, and determining the feasibility of a method combining intensity detection and polarization detection.
Therefore, a technical solution to the above problems is urgently needed in the prior art.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in order to realize the distinguishing of oil spilling and better carry out the effective monitoring of ocean oil spilling accidents, the invention aims to provide a ocean oil spilling detection method based on visible light/infrared polarization characteristics.
A marine oil spill detection method based on visible light/infrared polarization characteristics is characterized by comprising the following steps: comprises the following steps which are carried out in sequence;
step one, building a visible light/infrared oil spilling polarization imaging test device outdoors, and determining the environmental condition of a position to be detected;
secondly, visible light/infrared polarization characteristic images of sea water and five common oil species of heavy oil, palm oil, crude oil, gasoline and diesel oil are obtained by the visible light/infrared polarization imaging test device built in the first step under the conditions of downward shooting and side shooting respectively;
analyzing the gray value of the image obtained in the step two, and analyzing and comparing the polarization characteristic differences of different oil types in the step two to obtain the polarization characteristic parameters of different oil types;
and step four, judging the information of the environment to be detected according to the polarization characteristic parameters obtained in the step three, and obtaining the marine oil spill condition.
The visible light/infrared oil spilling polarization imaging test device in the first step comprises a polarization camera and an infrared polarization camera.
The illumination of the environmental condition in the first step is natural light, and the experiment time is acquired all day.
And in the second step, the included angle between the axis of the lens and the horizontal plane is 90 degrees during downward shooting, and the included angle between the axis of the lens and the horizontal plane is 45 degrees during lateral shooting.
The three analysis modes of the steps are based on the pixel-level polarization imaging theory.
The invention has the following beneficial effects: according to the design, the marine oil spill detection method based on the visible light/infrared polarization characteristics is provided, and the visible light/infrared polarization characteristics of common marine oil spills are compared and analyzed through a method combining intensity detection and polarization detection, so that the oil spill types are distinguished.
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FIG. 1 is a flow chart of the present invention.
FIG. 2 shows the linear polarization of different oil types at different filters during the analysis.
FIG. 3 shows the circular polarization of different oil types at different filters during the analysis.
Detailed Description
The invention will be further described with reference to the accompanying drawings and the detailed description below:
a marine oil spill detection method based on visible light/infrared polarization characteristics is characterized by comprising the following steps: comprises the following steps which are carried out in sequence;
step one, building a visible light/infrared oil spilling polarization imaging test device outdoors, and determining the environmental condition of a position to be detected;
secondly, visible light/infrared polarization characteristic images of sea water and five common oil species of heavy oil, palm oil, crude oil, gasoline and diesel oil are obtained by the visible light/infrared polarization imaging test device built in the first step under the conditions of downward shooting and side shooting respectively;
analyzing the gray value of the image obtained in the second step, and analyzing and comparing the polarization characteristic differences of different oil types in the second step to obtain the polarization characteristic parameters of different oil types;
and step four, judging the information of the environment to be detected according to the polarization characteristic parameters obtained in the step three to obtain the marine oil spill situation, and effectively distinguishing the oil spill types.
The visible light/infrared oil spilling polarization imaging test device in the first step comprises a polarization camera and an infrared polarization camera.
The illumination of the environmental condition in the first step is natural light, and the experiment time is acquired all day.
And in the second step, the included angle between the axis of the lens and the horizontal plane is 90 degrees during downward shooting, and the included angle between the axis of the lens and the horizontal plane is 45 degrees during lateral shooting.
The three analysis modes of the steps are based on the pixel-level polarization imaging theory.
And analyzing the polarization characteristic of sea surface oil spill based on a pixel level polarization imaging theory. A visible light/infrared oil spill polarization imaging test device is built outdoors, and visible light/infrared polarization characteristic images of five common oil species such as heavy oil, palm oil, crude oil, gasoline and diesel oil are obtained under the conditions of oblique shooting and lateral shooting respectively. The polarization characteristic difference of different oil types is analyzed by extracting the gray value of the image and comparing.
The marine oil spill effective detection method based on the visible light/infrared polarization characteristics can draw a conclusion that:
(1) the oil spill is more obvious than the polarization characteristic of seawater;
(2) under different wave bands, different observation angles and different oil polarization degree characteristics are different;
(3) the heavy oil and the crude oil have obvious characteristics and are easily distinguished from light oil;
(4) the heavy oil and the crude oil can be obviously distinguished by circular polarization, and the light oil types are also distinguished to a certain extent.
Claims (5)
1. A marine oil spill detection method based on visible light/infrared polarization characteristics is characterized by comprising the following steps: comprises the following steps which are carried out in sequence;
step one, building a visible light/infrared oil spilling polarization imaging test device outdoors, and determining the environmental condition of a position to be detected;
secondly, visible light/infrared polarization characteristic images of sea water and five common oil species of heavy oil, palm oil, crude oil, gasoline and diesel oil are obtained by the visible light/infrared polarization imaging test device built in the first step under the conditions of downward shooting and side shooting respectively;
analyzing the gray value of the image obtained in the step two, and analyzing and comparing the polarization characteristic differences of different oil types in the step two to obtain the polarization characteristic parameters of different oil types;
and step four, judging the information of the environment to be detected according to the polarization characteristic parameters obtained in the step three to obtain the marine oil spill situation, and effectively distinguishing the oil spill types of the area to be detected.
2. The method for detecting marine oil spill based on visible light/infrared polarization characteristics as claimed in claim 1, wherein: the visible light/infrared oil spilling polarization imaging test device in the first step comprises a polarization camera and an infrared polarization camera.
3. The method for detecting marine oil spill based on visible light/infrared polarization characteristics as claimed in claim 1, wherein: the illumination of the environmental condition in the first step is natural light, and the experiment time is acquired all day.
4. The method for detecting marine oil spill based on visible light/infrared polarization characteristics as claimed in claim 1, wherein: and in the second step, the included angle between the axis of the lens and the horizontal plane is 90 degrees during downward shooting, and the included angle between the axis of the lens and the horizontal plane is 45 degrees during lateral shooting.
5. The method for detecting marine oil spill based on visible light/infrared polarization characteristics as claimed in claim 1, wherein: the three analysis modes of the steps are based on the pixel-level polarization imaging theory.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104914082A (en) * | 2015-05-20 | 2015-09-16 | 中国石油大学(华东) | UV-induced fluorescence multi-spectral imaging ocean oil spill type identification method |
| CN106198443A (en) * | 2016-06-24 | 2016-12-07 | 湖北久之洋红外系统股份有限公司 | Airborne hyperspectral infrared spilled oil monitoring method and system |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104914082A (en) * | 2015-05-20 | 2015-09-16 | 中国石油大学(华东) | UV-induced fluorescence multi-spectral imaging ocean oil spill type identification method |
| CN106198443A (en) * | 2016-06-24 | 2016-12-07 | 湖北久之洋红外系统股份有限公司 | Airborne hyperspectral infrared spilled oil monitoring method and system |
Non-Patent Citations (2)
| Title |
|---|
| KAN REN ET AL.: "Calculation method of multiangle polarization measurement for oil spill detection", 《APPLIED OPTICS》 * |
| SHEN HUI-YAN ET AL.: "Research on Multi-angle Near Infrared Spectral-polarimetric Characteristic for Polluted Water by Spilled Oil", 《PROC. OF SPIE》 * |
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