Target detection method based on the single laser return waveform

Nanxiang Zhao; Yihua Hu; Min He

doi:10.1117/12.836263

28 August 2009 Target detection method based on the single laser return waveform

Nanxiang Zhao, Yihua Hu, Min He

Proceedings Volume 7382, International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging; 73822A (2009) https://doi.org/10.1117/12.836263
Event: International Symposium on Photoelectronic Detection and Imaging 2009, 2009, Beijing, China

Abstract

The improving resolving power of laser imaging system is limited by the laser footprint size on the target. Employing only echo delay and intensity information, the information of the targets inside the footprint is difficult to be obtained for the echo signal of the targets maybe is submerged by each other. Under the remote laser imaging, the serious loss of image quality may occur because of the large footprint. The target detection method based on the single laser return waveform was studied and the provided to get the target information inside the laser footprint. Firstly, the basis laser echo signal model of the target inside the footprint was built. On the basis, the decomposition algorithm was provided which can decompose a laser return waveform into a series of components assuming that each component corresponding to a sub-target inside the laser footprint. After the primary sub-target return waveforms was obtained, however, there still exists some small sub-targets inside the laser footprint whose return signal is hardly to be extracted because they are submerged by the neighborhood sub-target return signal. The subtracting algorithm between the whole return waveform and the components waveform provides the way to get the submerged return waveforms of sub-target. So, the information of sub-targets inside the laser footprint would be obtained. In the end, the actual laser return data was analyzed employing the method to get the range position information of the sub-targets inside the laser footprint, which verifies the method validity.

Citation Download Citation

Nanxiang Zhao, Yihua Hu, and Min He "Target detection method based on the single laser return waveform", Proc. SPIE 7382, International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging, 73822A (28 August 2009); https://doi.org/10.1117/12.836263

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KEYWORDS

Laser imaging

Target detection

Pulsed laser operation

Imaging systems

Laser systems engineering

Data processing

Reflectivity

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