Green tide information extraction method
A technology of information extraction and green tide, applied in the field of remote sensing image processing, can solve problems such as impact, low computational efficiency, and failure to meet requirements
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Embodiment 1
[0036] The green tide information extraction method involved in this embodiment is completed with the help of computers and satellite remote sensing images. The process includes screening and preprocessing data sources, calculating and determining the range of green tides, cropping images of irregular green tide ranges, extracting green tide information and quantifying There are five steps to calculating the green tide area:
[0037] (1) Screening and preprocessing data sources: In clear weather, few clouds, no rain, and no typhoon, obtain sea area satellite remote sensing images according to conventional methods, and filter less noise, high definition, uniform brightness, and image resolution less than It is equal to 30 meters and can cover the image of the green tide area, and perform geometric correction and image mosaic preprocessing on the selected image data to complete the screening and preprocessing of the data source;
[0038] (2) Calculate and determine the range of ...
Embodiment 2
[0067] The steps of the method for extracting green tide information involved in this embodiment are the same as in Example 1, and the green tide information obtained by it is obtained using traditional manual discrimination and the threshold method of setting to obtain the data parameters of green tide information in Table 1; based on the variational model The data parameters of the green tide information obtained by the quantitative method are shown in Table 2. The time in Table 1 and Table 2 is the working time from the start of the green tide information extraction to the total area of the green tide information, based on the variational model and the quantitative method. The total area of α is slightly different depending on the initial parameters. Among them, the value of α affects the operating efficiency and is the key initial parameter. Analysis of Table 1 shows that the total area of green tide information extracted when the NDVI threshold is -0.17 (51.0678) is ...
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