Maotang Li

China Institute of Water Resources and Hydropower Research, Peping, Beijing, China

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Publications (2)1.99 Total impact

  • Maotang Li · H.D. Cheng · Yejun Wang
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    ABSTRACT: Although satellite imaging is widely used today, an airborne survey system is still more efficient and effective under certain circumstances. Airborne survey can successfully detect and transmit target information in real time that is useful and critical for related agencies, such as environmental management, natural-disaster monitor and control, etc. Using a real-time synthetic-aperture-radar image processing approach based on a distribution system, image data are synchronized with a global positioning system; a satellite-communication system of data transmission is designed and implemented; and a novel image-compression method, which is wavelet-based, is developed. The main idea of the proposed system is based on a function-distribution personal computer (PC) system: Data preprocessing, post processing, and extraction of images, data processing, image display, and image printing, are performed by different PCs. The method of image transmission proposed here is based on the satellite communication system. The proposed system has the advantage of low cost (both hardware prototype and maintenance) and rapid processing speed (only in several seconds; the disaster images from the air are processed and transmitted to the Disaster Reduction Center and to other users by the satellite communication system). The system has been applied to a real-time disaster monitor (such as a forest fire, a flood, etc.), real-time target tracking, large-scale topographic mapping, environmental survey, etc.
    IEEE Transactions on Instrumentation and Measurement 01/2008; 56(6-56):2404 - 2410. DOI:10.1109/TIM.2007.907952 · 1.79 Impact Factor
  • Maotang Li · Yonglin Xue · Yejun Wang · Xin Fang · Jing An
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    ABSTRACT: In order to get accurate survey and careful studied for some special places, such as ocean, earthquake area and flooded area, it is convenient to use the airborne surveying system. With the rapid development of science and technology recently, the intercommunication is the unavoidable trend of the development for the future communication system. So a very useful "Airborne-Satellite-Ground (ASG)" system has been developed and a "Point-to-Point Airborne-Satellite-Ground Intercommunication (PPASGI)" system is being developed. The "Airbome-Satellite-Ground (ASG)" system is consisted of the Image Capture System (Airborne Station), Image Relay System (Satellite Transmitting Station) and Image Receive System (Ground Receiving Station), which is the system with one-direction and two-jump transmission. The PASGI system is the system with duplex transmission capability. In the two systems, the technologies of image capturing and processing are the key Technologies, In this paper, the Real Time Image Capture (RTIC) Technology will be discussed first. Then the Real Time Image Receiving and Processing (RTIRP) technology will be discussed. Finally the PASGI system will be introduced and the some simulating results will be given.
    Proceedings of SPIE - The International Society for Optical Engineering 01/2002; DOI:10.1117/12.452791 · 0.20 Impact Factor