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For radar imaging of multiple targets in different beams, it is necessary for the radar network to coordinate the imaging task among various radars to achieve the best multi-target imaging performance under limited system resources. This paper proposes a task allocation optimization method of inverse synthetic aperture radar (ISAR) imaging for multiple targets. The imaging resolution is an important...
The three-dimensional (3D) image of target can be obtained by airborne downward-looking 3D multiple-input-multiple-output synthetic aperture radar (MIMO-SAR). With the resolution of MIMO-SAR improved, the amount of data increases dramatically, which has been a huge challenge for both data storage and transmission. In this paper, a novel imaging method for airborne downward-looking 3D MIMO-SAR based...
This paper focuses on the problem of maritime surveillance for ship detection and proposes a novel monostatic SAR high resolution wide swath imaging scheme. The scheme changes the way that Scan SAR illuminates sub-scenes, and proposes a scanning mode using the prior information of ships' spatial distribution in each sub-scene. Firstly, a method based on range profiles is used to obtain the target...
In this paper three images of Landsat TM data of 1983, 1999 and 2010 in winter being used to analyze the land cover changes in Lushan and surrounding areas. This paper classified the land cover types into 7 classes as cultivated land, grass land, forest land, sand, water, construction land and unused land by maximum likelihood classification, then analyses the land cover change. The results show that...
In the face of sparse aperture data imaging, a method for high resolution radar imaging based on compressed sensing using sparse stepped-frequency signal is proposed in this letter. In the signal stretching process, high resolution target echo can be acquired through second sample for the coarse-resolution range profile. Based on the sparsity of the signal in the spectrogram, we can construct a reasonable...
The research of tree-rings helps us to understand the local climate change, pollution, etc. in that time, but also to identify the wood species. The detection of tree-rings boundary is a prerequisite for the computer to automatically obtain information about tree-rings. A new approach based on mathematical morphology to achieve tree-rings boundary from micro-images of wood on cross-section is presented...
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