Water and soil conservation monitoring method based on unmanned aerial vehicle low-altitude remote sensing and object-oriented classification

Abstract

The invention relates to the field of environmental monitoring, discloses a water and soil conservation monitoring method based on unmanned aerial vehicle low-altitude remote sensing and object-oriented classification, and solves the problems of poor applicability and low working efficiency of an existing method. The method comprises the following steps that: carrying a visible light camera on anunmanned aerial vehicle to shoot a water and soil conservation monitoring target area, and collecting a control point; carrying out coordinate system registration and area integral adjustment and multi-visual angle image dense matching to generate dense point clouds, furthermore, generating a TIN (Triangular Irregular Network), and generating the real three-dimensional model of an area to be detected through texture mapping; calculating and segmenting the three-dimensional model to obtain a segmentation scale which is suitable for the actual optimum of the water and soil conservation monitoring target area; determining a feature parameter index which participates in object-oriented classification, and carrying out supervision classification and extraction; and adopting an accuracy evaluation method and a confusion matrix based on position information to calculate total classification accuracy and a Kappa coefficient, and evaluating the classification accuracy of the model. The method is suitable for water and soil conservation monitoring.

Description

technical field

[0001] The invention relates to the field of environmental monitoring, in particular to a water and soil conservation monitoring method based on unmanned aerial vehicle low-altitude remote sensing and object-oriented classification. Background technique

[0002] Soil and water conservation monitoring refers to the long-term investigation, observation and analysis of the occurrence, development, hazards and benefits of soil and water conservation. Through soil and water conservation monitoring, understand the types, intensity and distribution characteristics of soil and water loss, hazards and their impact, occurrence and development, and dynamic trends in the target area, and make macro decisions on comprehensive control of water and soil erosion and ecological environment construction, as well as scientific, reasonable and systematic measures. It is of great significance to lay out various measures of water and soil conservation.

[0003] Soil and water con...

Images