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Method and device for extracting multiple cropping index

A technology of multiple cropping index and extraction method, which is applied in the field of multiple cropping index extraction method and device, and can solve the problems of large error and inaccuracy in the extraction of multiple cropping index

Active Publication Date: 2018-07-31
BEIJING NORMAL UNIVERSITY
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  • Abstract
  • Description
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Problems solved by technology

[0005] In order to overcome the above-mentioned problem of large error and inaccuracy in the extraction of multiple cropping indices or at least partially solve the above problems, the present invention provides a method and device for extracting multiple cropping indices

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  • Method and device for extracting multiple cropping index
  • Method and device for extracting multiple cropping index
  • Method and device for extracting multiple cropping index

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Embodiment Construction

[0049] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0050] In one embodiment of the present invention, a method for extracting multiple index is provided, figure 1 It is a schematic diagram of the overall process flow of the multiple cropping index extraction method provided by the embodiment of the present invention, the method includes: S1, according to the start time of crop cultivation in the target area, obtain the return value of the target area within a preset time period from the start time Normalized vegetation index time series curve; S2, using the second-order difference method to obtain the peaks in the normalized vegetation index time series curve, if each of the peaks is a single interference peak, then condit...

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Abstract

The invention provides a method and device for extracting a multiple cropping index, the method comprising: S1, obtaining a normalized vegetation index time series curve of a target area within a preset time period from the start time according to the start time of crop cultivation in the target area; S2, using a second-order difference method to obtain a peak in the normalized vegetation index time series curve, and if the peak is a single interference peak, performing condition smoothing on the single interference peak; S3, using the second-order difference method again to obtain a peak value in the normalized vegetation index time series curve subjected to the condition smoothing, calculating the total number of peaks in the normalized vegetation index time series curve subjected to thecondition smoothing, and using the total number of peaks a multiple cropping index of the target area. The method and device improve the extraction precision of the multiple cropping index.

Description

technical field [0001] The invention belongs to the field of agricultural production evaluation, and more specifically relates to a method and device for extracting a multiple cropping index. Background technique [0002] Multiple cropping index (MCI, Multiple Cropping Index) is a commonly used quantitative index in the evaluation of agricultural production and the evaluation of cultivated land utilization status. The ratio of the total sown area of ​​crops to the cultivated area in a year on cultivated land. The multiple cropping index reflects the degree of cultivated land utilization and is expressed as a percentage. The calculation formula is multiple cropping index = the total area of ​​sown (or transplanted) crops in the whole year ÷ the total area of ​​cultivated land × 100%. The multiple cropping index can be used to compare the utilization of cultivated land in different years, different regions and different production units. [0003] At present, the multi-cropp...

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/02
CPCG06Q10/0639G06Q50/02
Inventor 王昊宇赵祥高涛杜晓铮
Owner BEIJING NORMAL UNIVERSITY
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