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Farmland cropping index automatic extracting method

A multi-cropping index and automatic extraction technology, which is applied in the fields of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of immature monitoring technology methods, weak anti-noise ability, and insufficient robustness of cultivated land multi-cropping index. High degree of automation, accurate and effective extraction, good robustness

Active Publication Date: 2014-07-16
FUZHOU UNIV
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AI Technical Summary

Problems solved by technology

However, the peak value method has weak anti-noise ability, insufficient robustness, and poor versatility
In short, the technical method of monitoring multi-cropping index of cultivated land within a year through remote sensing technology is still immature and is in the development stage. It is urgent to introduce a new automatic identification method of multi-cropping index of cultivated land

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  • Farmland cropping index automatic extracting method
  • Farmland cropping index automatic extracting method
  • Farmland cropping index automatic extracting method

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Embodiment Construction

[0027] The technical solution of the present invention will be specifically described below in conjunction with the accompanying drawings.

[0028] A method for automatically extracting multi-cropping index of arable land of the present invention, the method is based on time-series remote sensing data, specifically comprises the following steps,

[0029] Step S1: Obtain the wavelet coefficient spectrum decomposed by continuous wavelet based on the intra-year time series signal;

[0030] Step S2: From the wavelet coefficient spectrum obtained by continuous wavelet decomposition, extract a series of wavelet coefficient contour lines with positive values;

[0031] Step S3: Count whether each wavelet coefficient contour line is closed in turn, and store its quantity in the eigenvalue variable N one by one;

[0032] Step S4: According to the maximum value of the characteristic variable N and whether multiple contours overlap and cover the scale interval, establish the ripening dis...

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Abstract

The invention relates to the technical field of remote-sensing image information processing, in particular to a farmland cropping index automatic extracting method. The method based on remote-sensing time sequence data includes: continuous wavelet transform is performed on time sequence signals within a year pixel by pixel to obtain a wavelet coefficient spectrum, a series of wavelet coefficient contour lines are extracted from the wavelet coefficient spectrum, a cropping system judging standard is built according to the number of the contour lines of the closed wavelet coefficient which is detected at the same time and the condition whether the intersection of the dimension intervals covered by the contour lines of the closed wavelet coefficient exists or not, and automatic extracting of farmland cropping indexes is achieved. The method has the advantages that the mapping relations of the closed contour lines and crop growing peaks are fully utilized, interference is further removed by setting conditions such as contour line search dimension intervals and initial values, and the method is good in robust, high in categorization precision, high in automation degree and interference resistance, and the like.

Description

technical field [0001] The invention relates to the technical field of remote sensing image information processing, in particular to an automatic extraction method for multi-cropping index of cultivated land. Background technique [0002] MCI is the number of times crops are planted on arable land in a year. In the environment of our country with more people and less land, maintaining long-term stability and appropriately increasing the multi-cropping index of cultivated land is an effective way to ensure food security. Real-time, rapid and accurate monitoring of the multi-cropping index of cultivated land across the country is crucial to achieving sustainable agricultural development. The methods for extracting multi-cropping index of cultivated land are divided into two categories: one is based on land survey and agricultural statistics, and the other is based on remote sensing time series data. [0003] The traditional methods based on land survey and agricultural stati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 邱炳文李维娇
Owner FUZHOU UNIV
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