Airborne LiDAR Methods Applied to Riverine Environments - Fluvial Remote Sensing for Science and Management - page 140

Emited pulse Received signal Multipulse process

= 2 echoes

Gaussians fit
= 3 echoes

P P P

multipulse
threshold

t t t

(a) (b) (c)

Figure 7.1a The emitted pulse on the scene, the received signal waveform (a), the result of the multi-pulse process (b) and the result
of Gaussian fitting process (c) for target range extraction.

Figure 7.1b 3D point clouds of the first return
echoes (black) and last return echoes (grey) on
two trees and a flat, bare terrain.

© Cemagref.