tailieunhanh - Báo cáo hóa học: " Research Article Full Waveform Analysis for Long-Range 3D Imaging Laser Radar"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: IResearch Article Full Waveform Analysis for Long-Range 3D Imaging Laser Radar | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2010 Article ID 896708 12 pages doi 2010 896708 Research Article Full Waveform Analysis for Long-Range 3D Imaging Laser Radar Andrew M. Wallace EURASIP Member Jing Ye EURASIP Member Nils J. Krichel Aongus McCarthy Robert J. Collins and Gerald S. Buller School of Engineering and Physical Sciences Heriot-Watt University Riccarton Edinburgh EH14 4AS UK Correspondence should be addressed to Andrew M. Wallace Received 27 December 2009 Accepted 21 June 2010 Academic Editor Yingzi Du Copyright 2010 Andrew M. Wallace et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. The new generation of 3D imaging systems based on laser radar ladar offers significant advantages in defense and security applications. In particular it is possible to retrieve 3D shape information directly from the scene and separate a target from background or foreground clutter by extracting a narrow depth range from the field of view by range gating either in the sensor or by postprocessing. We discuss and demonstrate the applicability of full-waveform ladar to produce multilayer 3D imagery in which each pixel produces a complex temporal response that describes the scene structure. Such complexity caused by multiple and distributed reflection arises in many relevant scenarios for example in viewing partially occluded targets through semitransparent materials . windows and through distributed reflective media such as foliage. We demonstrate our methodology on 3D image data acquired by a scanning time-of-flight system developed in our own laboratories which uses the time-correlated single-photon counting technique. 1. Introduction In general laser range finding can be achieved on the basis of triangulation or time-of-flight of