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High Performance of Imaging Extraction for Infrared Satellite Cloud Image
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作者 刘正光 刘勇 沈桂雄 《Transactions of Tianjin University》 EI CAS 2002年第4期261-264,共4页
The isotherm is an important feature of infrared satellite cloud images (ISCI), which can directly reveal substantial information of cloud systems. The isotherm extraction of ISCI can remove the redundant information ... The isotherm is an important feature of infrared satellite cloud images (ISCI), which can directly reveal substantial information of cloud systems. The isotherm extraction of ISCI can remove the redundant information and therefore helps to compress the information of ISCI. In this paper, an isotherm extraction method is presented. The main aggregate of clouds can be segmented based on mathematical morphology. T algorithm and IP algorithm are then applied to extract the isotherms from the main aggregate of clouds. A concrete example for the extraction of isotherm based on IBM SP2 is described. The result shows that this is a high efficient algorithm. It can be used in feature extractions of infrared images for weather forecasts. 展开更多
关键词 infrared satellite cloud images (ISCI) isotherm extraction image compression weather forecast
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Local Spiral Curves Simulating Based on Hough Transformation and Center Auto-Locating of Developing Typhoon 被引量:1
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作者 王萍 郭传澍 罗颖昕 《Transactions of Tianjin University》 EI CAS 2006年第2期142-146,共5页
In the developing phase of typhoon formation, the spiral belt partly emerges in satellite cloud images. This research starts from images and moves on to graphics and then to representation and recognition. Following t... In the developing phase of typhoon formation, the spiral belt partly emerges in satellite cloud images. This research starts from images and moves on to graphics and then to representation and recognition. Following this route, local spiral cloud belt is segmented from the raw images using image segmentation, the spiral information is extracted using mathematic morphology, and local spiral curves are detected using Hough transformation. The problem of center locating of developing typhoon has finally been solved through a search algorithm of spiral curve. For No. 99082008 cloud image, the result produced by the algorithm in this paper is at 122..3 degree west longitude, 117.5 degree north latitude. The real typhoon center location was at 122.4 degree west longitude, 18 degree north latitude. 展开更多
关键词 Hough transformation spiral curve simulating infrared satellite cloud images center locating of developing typhoon
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