Spectral characteristic based remote sensing monitoring method of plastic film mulched farmland

Abstract

The invention discloses a spectral characteristic based remote sensing monitoring method of plastic film mulched farmland. The spectral characteristic based remote sensing monitoring method of the plastic film mulched farmland comprises a step S1 of carrying out preprocessing on a remote sensing image, which comprises S1, radiation correction, atmospheric correction and the carrying out of inlaying and cutting processing on an image to obtain a research-area image, on the remote sensing image; a step S2 of establishing a plastic film mulched farmland remote sensing monitoring classification system, so as to distinguish the plastic film mulched farmland and other ground objects; a step S3 of collecting irregular polygonal samples of different ground object types in the classification system through visually interpreting a Google Earth image with a time phase same with that of the research-area image, and then delineating regular polygonal samples of a predetermined-size picture element anew in irregular polygons through visual interpretation; a step S4 of carrying out analysis on the separability of the different ground objects in the research-area image, so as to select a separable wave band; a step S5 of classifying the research-area image by utilizing the regular polygonal samples and using a classifier. The invention provides a new method for monitoring the plastic film mulched farmland.

Description

technical field [0001] The invention relates to remote sensing monitoring technology, more specifically, to a method for remote sensing monitoring of farmland covered by plastic film based on spectral characteristics. Background technique [0002] Plastic film mulching cultivation can significantly improve the habitat conditions such as temperature, light, water, air, and fertilizer in farmland, increase soil moisture, promote crop growth and development, shorten the growth period, avoid later-stage diseases and insect pests and natural disasters such as dryness, heat, and wind, and greatly increase crop yields , and can be listed in advance to increase economic income. It is one of the key cultivation techniques in arid and semi-arid areas, areas with low temperature and water shortage, and areas with large temperature and precipitation changes and regional differences. [0003] However, after the crops are harvested, the remaining mulch film in the farmland will cause the ...

AI Technical Summary

Problems solved by technology

However, the current spatial distribution pattern, distribution area and change characteristics of plastic film mulched farmland in my country are still unclear.

Therefore, it is impossible to provide a basis for the scientific planning and management of plastic film production, use, and residual film recycling, nor can it provide a reference for mitigating the negative impact of plastic film covering technology and finding effective ways to solve problems.

It is also unable to provide basic data for other research (crop phenology changes, surface temperature and humidity, evapotranspiration, etc.)

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