Denoising processing method for airborne laser sounding received waveform and system thereof

Abstract

The invention relates to a denoising processing method for airborne laser sounding received waveform and system thereof, and the method specifically comprise the following steps: acquiring waveforms to be processed, estimating corresponding water depth to be measured according to the waveforms, and dividing corresponding water depths to be measured into at least deep water and shallow water basedon an estimation result; processing the waveforms corresponding to the deep water depth to be measured by a mean square difference function method, and processing the waveforms corresponding to the shallow water depth to be measured by a Richardson-Lossian deconvolution method. The method provided by the invention calculates the effective length of the received waveform and is used for approximateestimation of water depth; and then different preprocessing modes are adopted for the received waveform according to the water depth approximate value, so that the preprocessing is more targeted, andthe processing result and the denoising effect are better.

Description

technical field [0001] The invention relates to a denoising processing method and system for airborne laser sounding received waveforms, belonging to the technical field of airborne laser sounding. Background technique [0002] Bathymetry is of great significance to the management and development of rivers, lakes and oceans. Sonar sounding is the mainstream sounding method at present, but the measurement range is limited by the traffic capacity of ships, so it is not suitable for shallow water measurement. Airborne lidar bathymetry (ALB) can achieve fast, intensive and accurate measurements in shallow waters, and has been widely used in the production of ocean depth maps, shallow water monitoring, underwater target detection, and three-dimensional points of underwater terrain. fields such as cloud generation (Liu et al., 2011). The principle of ALB technology is to use the blue-green laser (532nm) with strong penetrability to the water body, through the emission and recept...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method and system for denoising the receiving waveform of airborne laser sounding, which is used to solve the problem of poor adaptability and problems in the prior art when processing the receiving waveform of airborne laser sounding with noise reduction. Enhanced noise produces false signals and stretches effective signals to reduce signal resolution

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