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Water algae pollution detection method based on multispectral remote sensing image

A technology for remote sensing image and pollution detection, applied in measurement devices, material analysis through optical means, instruments, etc., can solve the problems of missed detection of water-polluted areas, misjudgment of water-polluted areas, etc., to improve detection capabilities and improve detection efficiency and detection accuracy, improving the effect of fast and effective monitoring capabilities

Active Publication Date: 2017-01-25
哈尔滨鹰眼科技有限公司
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Problems solved by technology

[0004] The present invention aims to solve the problems of missed detection of serious water pollution areas and misjudgment of water pollution areas caused by the traditional use of multi-spectral remote sensing images for rapid detection of water pollution in a large area, and proposes a water body algae pollution based on multi-spectral remote sensing images Detection method

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  • Water algae pollution detection method based on multispectral remote sensing image
  • Water algae pollution detection method based on multispectral remote sensing image
  • Water algae pollution detection method based on multispectral remote sensing image

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specific Embodiment approach 1

[0018] Specific implementation mode one: combine figure 1 Describe this embodiment, a kind of water body algae pollution detection method based on multispectral remote sensing image of this embodiment is characterized in that: a kind of water body algae pollution detection method based on multispectral remote sensing image specific process is:

[0019] Step 1, input the multispectral remote sensing image data of the monitoring area and the corresponding band parameters in the data;

[0020] Step 2, screening the corresponding bands in the multispectral remote sensing image data input to the monitoring area and the bands closest to the fixed three bands used for the detection of water algae pollution;

[0021] Step 3. Calculate the new water body index WI according to step 2, and extract the water area based on the new water body index WI;

[0022] Step 4. Calculate the NDPI of the water area according to Step 3;

[0023] Step 5: Carry out algae pollution mapping of the wate...

specific Embodiment approach 2

[0024] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the central wavelengths of the three bands fixed in the step 2 for the detection of water body algae pollution are 0.56 μm (Green) and 0.66 μm (Red) respectively. , 0.83 μm (NIR), the corresponding bands in the multispectral remote sensing image data input to the monitoring area are respectively set as Band1, Band2 and Band3 respectively to the bands closest to the three fixed bands used for the detection of water algae pollution;

[0025] NIR is near infrared spectrum.

[0026] Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0027] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the water area extraction based on the improved water index in the step three; the specific process is as follows:

[0028] Step 31. The new water body index is used to reduce the regional misjudgment caused by severe water pollution when the water area is divided. The new water body index WI is calculated as follows:

[0029] W I = B a n d 1 - B a n d 2 ( B a n d 1 + B a n d 3 ) ( B a n d 2 + B a n ...

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Abstract

The invention relates to a water algae pollution detection method based on a multispectral remote sensing image, aiming at solving the problems of leak detection of an area with serious water pollution and misjudgment of the area with water pollution, caused in large-area rapid detection of water pollution by utilizing multispectral remote sensing image of the prior art. The method comprises the following specific steps: 1, inputting multispectral remote sensing image data in a monitoring area and corresponding wave band parameters in the data; 2, screening and inputting wave bands, closest to three fixed wave bands used for water algae pollution detection, in corresponding wave bands in the multispectral remote sensing image data in the monitoring area; 3, calculating new water index WI, and extracting in the water area based on WI; 4, calculating NDPI in the water area; and 5, drawing for the water algae pollution, and extracting in the area with water algae pollution according to set algae pollution early warning indexes. The method is used for the field of water algae detection.

Description

technical field [0001] The invention relates to a water body algae pollution detection method based on multispectral remote sensing images. Background technique [0002] Water resources, especially fresh water resources, are fundamental to the survival of human beings. However, due to changes in human activities or the earth's environment, the shortage of water resources has gradually increased. Water algae pollution is the main source of current harm to freshwater resources. Improving the real-time monitoring and detection capabilities of algae pollution in water bodies can effectively improve the efficiency of water pollution prevention and control, and alleviate the shortage of water resources, which is of great significance. [0003] At present, large-scale water pollution monitoring mainly relies on remote sensing images, especially multi-spectral remote sensing monitoring methods. Multispectral remote sensing has the advantages of large imaging area, short revisit c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/17
CPCG01N21/17G01N2021/1793
Inventor 谷延锋高国明
Owner 哈尔滨鹰眼科技有限公司
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