Remote sensing cultivated land change detection method and system considering phenological characteristics

A change detection and cultivated land technology, applied in the field of remote sensing application and analysis, can solve the problem of ineffective cultivated land change detection, and achieve the effect of eliminating false changes, eliminating false changes, and having good accuracy and robustness.

Active Publication Date: 2020-10-13
BEIJING NORMAL UNIVERSITY
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Problems solved by technology

Therefore, the existing time-series change detection methods are difficult to detect changes in cultivated land

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  • Remote sensing cultivated land change detection method and system considering phenological characteristics
  • Remote sensing cultivated land change detection method and system considering phenological characteristics
  • Remote sensing cultivated land change detection method and system considering phenological characteristics

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Embodiment Construction

[0058] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0059] The purpose of the present invention is to provide a remote sensing cultivated land change detection method and system that takes into account phenological characteristics, from the original two-point-based change detection to the change detection based on the two-phenology time series trajectory, and improves the accuracy, precision and robustness of the change detection. Great, to ensure the authenticity of the changed informatio...

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Abstract

The invention discloses a remote sensing cultivated land change detection method and system considering phenological characteristics. The method comprises the following steps: constructing a pluralityof time series data sets according to time series vegetation indexes; processing each time series data set by adopting an improved MPFIT algorithm to obtain a processed time series data set; constructing a multi-harmonic model corresponding to each time series data set according to each processed time series data set and double-peak or multi-peak distribution characteristics of the cultivated land in consideration of phenological years; optimizing each multi-harmonic model to obtain a cultivated land phenology time sequence track model corresponding to each time sequence data set; calculatingthe change intensity of the cultivated land based on the phenological time sequence track model of each cultivated land; judging whether the cultivated land changes or not according to the change intensity. According to the invention, the original change detection based on two points is improved to change detection based on two phenological time sequence tracks, the accuracy, precision and robustness of change detection are improved, and the authenticity of change information is ensured.

Description

Technical field [0001] The present invention relates to the field of remote sensing application and analysis, in particular to a remote sensing cultivated land change detection method and system taking into account phenological characteristics. Background technique [0002] Timely and accurate acquisition of the spatial distribution and change information of cultivated land is of great significance to the optimal allocation of cultivated land resources, the formulation of protection policies, the study of ecological environment, and sustainable development planning. Because of its macroscopic, efficient and convenient advantages, remote sensing has been widely used to determine the spatial distribution and change analysis of large-scale cultivated land for many years. Remote sensing detection of cultivated land changes refers to the use of remote sensing images covering the same area in different periods, combined with changes in the spectral characteristics of cultivated land, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06F30/20G06F17/18G06F17/16
CPCG06Q10/0639G06F30/20G06F17/18G06F17/16G06Q10/06375
Inventor 赵文智柏延臣
Owner BEIJING NORMAL UNIVERSITY
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