A method for evaluating soil heavy metal concentration in hyperspectral imagery based on spatial weight constraints and variational self-encoding feature extraction
A feature extraction and heavy metal technology, applied in the measurement of color/spectral characteristics, etc., can solve the problems of inability to overcome spatial heterogeneity, low model migration and generalization ability, etc., and achieve the effect of efficient and accurate evaluation
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[0032] The present invention will be further described below in conjunction with specific embodiments.
[0033] This example takes the research area of Yitong County, Jilin Province as an example to describe in detail the application of the hyperspectral image soil heavy metal concentration assessment method based on spatial weight constraints and variational self-encoding feature extraction. concentration determination.
[0034]1) Soil sample collection in the research area: The black soil area in the heavy industrial area of Northeast China was selected as the research area, and the sampling points were evenly arranged in the checkerboard method in the research area. The location of each sampling point needs to be determined in combination with the image spatial resolution and the Considering the topography and topography of the country, we should try our best to select areas with relatively single surface attributes to determine the location of soil sampling points, so ...
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