Method, device and system for determining canopy density of forest land

Abstract

The invention provides a method, a device and a system for determining canopy density of a forest land, which relate to the technical field of soil and water conservation monitoring. The method comprises the following steps: receiving forest land vegetation images collected in an automatic sampling period by a sampler arranged at a soil and water conservation monitoring site; photographing the forest land vegetation images by the sampler from the bottom to the top; processing the grey scale image of woodland vegetation to obtain grey scale image; obtaining the binary image by binarizing the gray image, wherein the vegetation canopy is black pixel and the sky is white pixel in the binarized image; obtaining the total number of black pixels by counting all the black pixels in the binary image; according to the preset canopy density formula, the total number of black pixels and the total number of all pixels, performing calculation to obtain the canopy density of a forest land. The invention solves the technical problem that the canopy of vegetation can not be effectively distinguished from the deciduous leaves on the surface and the associated shrub leaves on the surface due to the very close color, and the measured value is similar to the canopy density of a forest land, and achieves the technical effect of obtaining the accurate canopy density data of a forest land.

Description

technical field [0001] The invention relates to the technical field of soil and water conservation monitoring, in particular to a method, device and system for determining forest canopy density. Background technique [0002] In the water and soil conservation monitoring industry, a complete set of equipment for forest canopy density monitoring has appeared. The equipment uses the "photographing method" technology. Its principle is based on the photos taken from the upper part of the tree canopy, using graph paper or software to distinguish the canopy-occluded area and the non-canopy area, and calculate the area covered by the vegetation canopy. The area ratio of the area in the entire picture, that is, the vegetation canopy density. [0003] In actual implementation, the images collected by this method are very similar to the leaves of fallen leaves on the ground and the leaves of the associated shrubs on the ground, so it is often impossible to effectively distinguish the ...

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Problems solved by technology

[0004] In view of this, the purpose of the present invention is to provide a method, device and system for determining forest canopy density to alleviate the problem in the prior art that due to the very similar colors, it is impossible to effectively distinguish the vegetation canopy from the fallen leaves on the ground and the leaves of associated shrubs on the ground. , so the measured value is an approximate vegetation coverage, not a technical issue of forest canopy density

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