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Crown information extraction method and system based on high spatial resolution remote sense image

A high spatial resolution, remote sensing image technology, applied in the field of tree crown information extraction based on high spatial resolution remote sensing images, can solve the problems of quantitative estimation of stand canopy size in unsuitable forest areas, and difficulty in accurately estimating single tree crown, etc. Achieve the effect of saving manpower and material resources, timely and accurate acquisition, improving efficiency and automation

Inactive Publication Date: 2010-12-22
RES INST OF FOREST RESOURCE INFORMATION TECHN CHINESE ACADEMY OF FORESTRY
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Problems solved by technology

For forest stands with high canopy density, it is difficult to accurately estimate the canopy of individual trees with existing research methods.
Therefore, the existing methods are not suitable for quantitative estimation of stand canopy size in forest areas

Method used

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  • Crown information extraction method and system based on high spatial resolution remote sense image
  • Crown information extraction method and system based on high spatial resolution remote sense image
  • Crown information extraction method and system based on high spatial resolution remote sense image

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Embodiment Construction

[0027] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0028] refer to figure 1 , figure 1 It is a flow chart of the steps of an embodiment of the method for extracting tree crown information based on high spatial resolution remote sensing images of the present invention, including the following steps:

[0029] The data acquisition step 110 is to obtain remote sensing images of woodland; the preprocessing step 120 is to preprocess the remote sensing images to obtain the preprocessed remote sensing image data; the single forest image information extraction step 130 is to obtain the preprocessed remote sensing images Above, superimpose the forest phase map, take the forest phase map small class boundary as the clipping area, cut out the image information corresponding to each small cla...

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Abstract

The invention discloses a crown information extraction method and system based on the high spatial resolution remote sense image. The method comprises the following steps: obtaining a forest land remote sense image; preprocessing the remote sense image, obtaining the preprocessed remote sense image; adding a forest form map on to the preprocessed remote sense image, using the subcompartment boundary of the forest form map as the clipping region to clip the image information corresponding to each subcompartment in the forest form map, extracting single forest stand image information; utilizing the maximally stable extremal region method to divide the crown and background areas of the single forest stand image information; and extracting the crown image of single tree in the multi-tree crown area, and calculating the number of trees and the crown factor of each tree in the crown distribution map. By using the method and system of the invention, the connected crowns are easy to separate under the condition that the crown image contains fewer pixels, the operation efficiency is high; and the efficiency and degree of automation of the forest resource investigation can be efficiently increased, the forest resource information can be accurately obtained, and manpower and material resources are saved.

Description

technical field [0001] The invention relates to the technical field of tree crown information extraction, in particular to a tree crown information extraction method and system based on high spatial resolution remote sensing images. Background technique [0002] At present, the quantitative measurement method of individual tree crown width in actual forest stands is mostly used to obtain parameters such as the profile of individual tree crowns. This method takes the trunk as the center, measures the radius of the trunk in 8 directions or 4 directions respectively, and then obtains the outline of the crown of a single tree with a circular or elliptical approximation method, and then estimates the size of the crown of a single tree. The workload of this method Large, high cost, low estimation frequency, difficult to obtain continuous observation data, and cannot provide timely and accurate decision support for forest resource management. [0003] Based on high-resolution remo...

Claims

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Application Information

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IPC IPC(8): G01B11/00G01B11/24G01B11/28
Inventor 黄建文鞠洪波陈永富张强胡珂刘晓双
Owner RES INST OF FOREST RESOURCE INFORMATION TECHN CHINESE ACADEMY OF FORESTRY
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