A kind of extraction method of winter wheat planting information

Abstract

The invention relates to a method for extracting winter wheat planting information, which mainly includes: based on the phenological characteristics of winter wheat overwintering, determining and acquiring remote sensing image data of winter wheat turning green period and winter wheat bare-field period, and respectively analyzing the remote sensing images of the two periods The data is preprocessed; combined with the historical cultivated land vector data, the range of cultivated land is determined, and the range of cultivated land is multi-scale segmented; the two phases of remote sensing image data are calculated respectively to obtain the normalized difference vegetation index of winter wheat in the two phases; Cultivated land range and two-period normalized difference vegetation index, automatically determine the normalized difference vegetation index threshold, and realize automatic extraction of winter wheat planting information. The present invention utilizes historical cultivated land vector data to fully excavate previous geographical information, has the advantages of simple principle, strong applicability, high precision and technical process, realizes automatic extraction, and can be widely used in area monitoring of winter wheat planting areas.

Description

technical field [0001] The invention belongs to the technical field of remote sensing applications, and in particular relates to a method for extracting winter wheat planting information. Background technique [0002] Wheat is one of the main food crops in my country, and the output of wheat is directly related to national food security and social stability. Wheat is divided into winter wheat and spring wheat, and winter wheat is mainly planted in my country. Timely and accurate extraction of winter wheat planting information is the basis for obtaining winter wheat planting area and forecasting yield. With the continuous development of remote sensing platforms and the continuous improvement of remote sensing image resolution, remote sensing technology is more and more widely used in the field of winter wheat monitoring. [0003] The types of crops in our country are complex and diverse. How to use remote sensing technology to identify winter wheat from many crops and impro...

AI Technical Summary

Problems solved by technology

Researchers have carried out a lot of research work, but the related methods are not conducive to large-scale commercial application

[0004] Since the extraction of winter wheat planting information by simple remote sensing methods cannot meet the accuracy requirements, in most of the current research, the remote sensing extraction results of winter wheat planting area are mostly verified by statistical data, and the accuracy of the statistical data itself cannot be guaranteed. In actual business applications, large-scale, fast and accurate extraction of winter wheat information has become the key

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