High-speed rail environment change monitoring method based on multi-dimensional feature extraction

Abstract

The invention discloses a high-speed rail environment change monitoring method based on multi-dimensional feature extraction. The high-speed rail environment change monitoring method comprises the steps of S1, preprocessing a high-resolution remote sensing image; s2, matching different time phase remote sensing images; s3, carrying out multi-dimensional change feature extraction; s4, performing imaging conversion and statistics on the feature map layer; s5, selecting a change sample by taking the imaged feature map layer as a data source, and performing optimal feature screening; s6, utilizingthe change extraction optimal feature combination space to construct a random forest classifier to perform change region extraction and optimization; and S7, optimizing and exporting a classificationresult to complete high-speed rail environment change monitoring. According to the method, surface change extraction along the high-speed rail can be effectively completed, compared with a pixel-by-pixel extraction method, salt and pepper noise can be effectively suppressed, the extraction precision of the change area is improved, meanwhile, the boundary of the change area is more matched with the real ground object condition, the monitoring efficiency of the surface environment change of the high-speed rail is effectively improved, and the monitoring labor and economic cost is saved.

Description

technical field [0001] The invention relates to the field of high-speed rail environment monitoring, in particular to a method for monitoring high-speed rail environment changes based on multi-dimensional feature extraction. Background technique [0002] With the rapid development of my country's high-speed rail construction, the mileage and coverage of high-speed rail continue to increase. It is estimated that by 2020, the total mileage of my country's high-speed rail will exceed 30,000 kilometers. High-speed railway, a high-speed transportation mode, not only benefits thousands of households, but also its operation safety has aroused great concern of the society. How to effectively monitor the environment along the high-speed rail and quickly extract the environmental changes along the line has become a new research direction for many domestic scholars. [0003] High-speed railways have high speeds per hour and have relatively strict requirements on the operating environm...

AI Technical Summary

Problems solved by technology

However, whether it is the direct image comparison method, the post-classification comparison method or the direct classification method, it is usually based on a single pixel, which is prone to salt and pepper noise for high-resolution remote sensing images.

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