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A method and system for pushing down the scale of leaf area index

A leaf area index and scale-down technology, applied in the field of remote sensing, can solve the problems of low spatial resolution of LAI, and achieve the effect of flexible application, wide product application and simple realization.

Active Publication Date: 2017-09-08
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the spatial resolution of the LAI obtained by this product is low. In practical applications, if the spatial resolution can be improved by scaling down (scale down refers to increasing the remote sensing image from a lower resolution to a higher resolution) , it can further improve the monitoring accuracy of product surface vegetation information

Method used

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  • A method and system for pushing down the scale of leaf area index
  • A method and system for pushing down the scale of leaf area index
  • A method and system for pushing down the scale of leaf area index

Examples

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Embodiment 1

[0024] figure 1 The implementation process of the method for pushing down the leaf area index scale provided by the first embodiment is shown, and the process of the method is described in detail as follows:

[0025] In step S101, the monitoring data of the resolution imaging spectrometer MODIS is acquired. The monitoring data includes the vegetation index at the first scale, the vegetation index at the second scale, and the leaf area index LAI at the first scale. 1 .

[0026] Preferably, after acquiring the monitoring data of a Moderate-resolution Imaging Spectroradiometer (MODIS), this embodiment further includes:

[0027] Preprocessing the acquired monitoring data.

[0028] The preprocessing process includes, but is not limited to, band extraction, projection conversion, and data splicing, cropping, extraction, and value conversion. After preprocessing, the monitoring data has a consistent data format.

[0029] In this embodiment, the second dimension is smaller than the first dimens...

Embodiment 2

[0053] figure 2 The composition structure of the leaf area index scale push-down system provided by the second embodiment of the present invention is shown. For ease of description, only the parts related to the embodiment of the present invention are shown.

[0054] The leaf area index scaling down system can be applied to various data processing terminals, such as Pocket Personal Computer (PPC), handheld computers, computers, notebook computers, Personal Digital Assistants (Personal Digital Assistant, PDA), etc., can be The software units, hardware units, or a combination of software and hardware running in these terminals can also be integrated into these terminals or run in the application systems of these terminals as independent pendants.

[0055] The system for pushing down the leaf area index scale includes a data acquisition unit 21, a normalization processing unit 22, a first calculation unit 23, and a second calculation unit 24. Among them, the specific functions of eac...

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Abstract

The present invention is applicable to the field of remote sensing technology, and provides a method and system for pushing down the scale of leaf area index. The method includes: acquiring monitoring data of the resolution imaging spectrometer MODIS. The vegetation index under the second scale and the leaf area index LAI1 under the first scale; the vegetation index under the first scale and the vegetation index under the second scale are normalized; based on the normalized first The vegetation index under the scale and the vegetation index under the second scale are calculated to obtain the vegetation coverage under the first scale and the vegetation coverage under the second scale; based on the LAI1 under the first scale, the vegetation under the first scale The coverage and the vegetation coverage under the second scale are calculated to obtain LAI2 under the second scale; wherein, the second scale is smaller than the first scale. The invention can effectively improve the monitoring precision of the surface vegetation information of the product through downscaling.

Description

Technical field [0001] The invention belongs to the technical field of remote sensing, and in particular relates to a method and system for pushing down the leaf area index scale. Background technique [0002] Leaf Area Index (Leaf Area Index, LAI) refers to the sum of the surface area of ​​all leaves on a unit ground area. It is a very important structural parameter in the land surface process and one of the most basic parameters describing the canopy structure of vegetation. The LAI of the spatio-temporal changes of vegetation can be retrieved from satellite remote sensing data. [0003] There are already many mature LAI products, such as the Moderate-resolution Imaging Spectroradiometer (MODIS) LAI product publicly released by the US Earth Observation Program (EOS). The main algorithm of this product is based on a strict three-way transmission theory. The MODIS surface reflectance information of up to 7 spectral bands is used, with high inversion accuracy and time resolution, w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/28
Inventor 张瑾陈劲松李洪忠梁守真
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI