Results 241 to 250 of about 60,436 (303)

A Method of Ship Wake Detection in SAR Images Based on Reconstruction Features and Anomaly Detector

IEEE International Geoscience and Remote Sensing Symposium, 2023
An anomaly-detection-based method is proposed to improve the performance of ship wake detection in synthetic aperture radar (SAR) images of different sea states. The dictionaries learned by sea clutter images are poor to sparsely reconstruct wake images,
Yanan Guan, Huaping Xu, Chunsheng Li
semanticscholar   +1 more source

Ship wake detection by Raman lidar

Applied Optics, 2010
We carried out a remote study of ship wakes by optical methods. Both Mie and Raman scattering signals and their evolution were simultaneously recorded by gated detector (intensified CCD). The Mie scattering signal was detectable within 1 min after water disturbance by a high-speed boat.
Alexey F, Bunkin, Vladimir K, Klinkov, Vladislav A, Lukyanchenko, Sergey M, Pershin   +3 more
openaire   +2 more sources

Ship wakes detection in SAR images

Proceedings 7th International Conference on Signal Processing, 2004. Proceedings. ICSP '04. 2004., 2005
Detecting ship wakes from spaceborne SAR images is significant. But it is particularly difficult, especially detecting-thin line features. Because those features are not only affected by speckle but also affected by various other factors and the image resolution is often coarser than the wide of the corresponding objects. In this paper, an algorithm is
null Zhu Weigang, null Wei Hua, null Jia Xin, null Zhou Yinqing   +3 more
openaire   +1 more source

Polarimetric detection and estimation of ship wakes

IEEE 1999 International Geoscience and Remote Sensing Symposium. IGARSS'99 (Cat. No.99CH36293), 2003
Classification of Earth natural components within a full polarimetric SAR image is one of the most important applications of radar polarimetry in remote sensing. An unsupervised classification procedure, based on neural networks with competitive architectures, is applied to the full polarimetric SAR images of sea surface and ship wakes for segmentation
E. Pottier, W.M. Boerner, D.L. Schuler
openaire   +1 more source

First Results of Ship Wake Detection by Deep Learning Techniques in Multispectral Spaceborne Images

IEEE International Geoscience and Remote Sensing Symposium, 2022
Maritime trade and trasport occupy a pivotal position in the current era of globalization. Thus, monitoring ships at sea represents the starting point of this paper in which a novel approach to detect ships by wake has been proposed, based on Instance ...
Claudio Esposito, Roberto Del Prete, M. Graziano, A. Renga   +3 more
semanticscholar   +1 more source

Detection of ship-wake in SAR images

Proceedings of International Radar Conference, 2002
This paper puts forward a local Radon transform with location capability, on this basis, a new lineament detection algorithm for ship-wake detection in SAR sea images is developed. Experimental results show that this algorithm has a high wake detection probability, and is suitable for the ship-wake detection in low signal noise ratio SAR images.
null Wang Jianguo, null Li Linjie, null Yang Jinhao, null Huang Shunji   +3 more
openaire   +1 more source

Detection of ship wake using an airborne magnetic transducer

Conference Record of Thirty-Second Asilomar Conference on Signals, Systems and Computers (Cat. No.98CH36284), 2000
Wakes induced by motion of vessels may extend for tens of kilometers and exist for hours under certain conditions in open sea. This forms a useful feature for long-range ship detection. We present a method for passively detecting a ship wake using measurements obtained by an airborne SQUID magnetic transducer that measures the first-order gradients of ...
N. Zou, A. Nehorai
openaire   +1 more source

Detecting Ship Wakes for the Study of Coastal Processes

Journal of Coastal Research, 2020
Ratsep, M.; Parnell, K.E., and Soomere, T., 2020. Detecting ship wakes for the study of coastal processes. In: Malvarez, G. and Navas, F. (eds.), Global Coastal Issues of 2020. Journal of Coastal Research, Special Issue No. 95, pp. 1258–1262. Coconut Creek (Florida), ISSN 0749-0208.Wakes from contemporary vessels may affect, and in some places dominate,
Rätsep, Margus, Parnell, Kevin E., Soomere, Tarmo   +2 more
openaire   +2 more sources

Infrared imaging simulation and detection of ship wake

SPIE Proceedings, 2015
The thermal wake would be formed owing to the cooling water or exhaust heat discharged by ship, and the cold wake could be formed by the cool water in the lower part of sea stirred up by the ship propeller or vortexes. Owing to the difference of surface temperature and emissivity between the ship wake and the surrounding ocean the ship wake will be ...
Li Yang, Xuan Chen, Shizheng Chang, Enchi Xu, Xingyu Wang, Ye Wang, Xiaolong Zhao, Yongchen Du, Wei Kou, Chunli Fan   +9 more
openaire   +1 more source

Ship Wake Detection Based on Polarimetric Enhancement and Deep Learning via a Simulated Full-Polarized Dataset

IEEE Canadian Journal of Electrical and Computer Engineering
Ship wake detection provides a supplementary way for ship target detection; however, the detection performances of small and slow targets under high sea state are always unsatisfying. Also, the potential of polarimetric enhancement and deep learning (DL)
Yanni Jiang, Ke Li, Ziyuan Yang, Tao Liu
semanticscholar   +1 more source