Imaging processing with bidirectional modulation in down-looking synthetic aperture imaging ladar

Zhiyong Lu; Yu Zhou; Jianfeng Sun; Zhu Luan; Lijuan Wang; Qian Xu; Liren Liu

doi:10.1117/12.2272426

6 September 2017 Imaging processing with bidirectional modulation in down-looking synthetic aperture imaging ladar

Zhiyong Lu, Yu Zhou, Jianfeng Sun, Zhu Luan, Lijuan Wang, Qian Xu, Liren Liu

Proceedings Volume 10410, Unconventional and Indirect Imaging, Image Reconstruction, and Wavefront Sensing 2017; 1041012 (2017) https://doi.org/10.1117/12.2272426
Event: SPIE Optical Engineering + Applications, 2017, San Diego, California, United States

Abstract

Down-looking synthetic aperture imaging ladar have bidirectional (positive and negative direction) modulation in the orthogonal direction of travel during phase modulation. The return signal can be also collected in the two directions. The imaging processing with bidirectional modulation is used and demonstrated. The signal-to-noise ratio can be enhanced in this mode synthetic aperture imaging ladar. Meanwhile, the velocity of carrying-platform can be faster. In the experiment, the return signals with bidirectional modulation are stacked and rebuilt. Compared to the unidirectional modulation imaging, the faster and clearer imaging is realized with bidirectional modulation. This technique has a great potential for applications in extensive synthetic aperture imaging ladar fields.

Citation Download Citation

Zhiyong Lu, Yu Zhou, Jianfeng Sun, Zhu Luan, Lijuan Wang, Qian Xu, and Liren Liu "Imaging processing with bidirectional modulation in down-looking synthetic aperture imaging ladar", Proc. SPIE 10410, Unconventional and Indirect Imaging, Image Reconstruction, and Wavefront Sensing 2017, 1041012 (6 September 2017); https://doi.org/10.1117/12.2272426

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KEYWORDS

Modulation

LIDAR

Synthetic aperture imaging

Image processing

Phase modulation

Remote sensing

Signal to noise ratio

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