Detection of weak laser pulses by full waveform stacking

U. Stilla, Wei Yao, B. Jutzi

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

17 Citations (Scopus)

Abstract

Pulse detection is a fundamental task of processing data of pulsed laser systems for extracting features of the illuminated object. Weak pulses below the threshold are discarded by classic methods and the involved information will get lost. In this paper we present an approach for detecting weak pulses from waveform laser data based on analyzing neighbourhood relations given by coplanarity constraint. Waveform stacking technique is used to improve the signal to noise ratio (SNR) of object with poor surface response by means of mutual information accumulation, thus hypotheses for planes of different slopes are generated and verified. Each signal is assessed by a likelihood value with respect to accepted hypotheses. At last signals will be classified according to likelihood values using two thresholds and visualized by the traffic-light paradigm. The presented method was applied as a low-level operation to a whole waveform cuboid of an urban area and shows promising results. Results contain detected pulses reflected from objects, which can not be predicted by the previously detected point cloud.
Original languageEnglish
Title of host publicationPIA 2007 - Photogrammetric Image Analysis, Proceedings
Pages25-30
Number of pages6
Publication statusPublished - 1 Dec 2007
Externally publishedYes
EventPhotogrammetric Image Analysis, PIA 2007 - Munich, Germany
Duration: 19 Sep 200721 Sep 2007

Conference

ConferencePhotogrammetric Image Analysis, PIA 2007
Country/TerritoryGermany
CityMunich
Period19/09/0721/09/07

Keywords

  • Correlation
  • Laser scanning
  • Pulse detection
  • Stacking
  • Waveform
  • Weak pulse signal

ASJC Scopus subject areas

  • Computer Vision and Pattern Recognition

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