Search Results - ZHANG Xiu-ying

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    Extraction of Torreya grandis Merrillii based on object-oriented method from IKONOS imagery

    Extraction of Torreya grandis Merrillii based on object-oriented method from IKONOS imagery by HAN Ning, ZHANG Xiu-ying, WANG Xiao-ming, WANG Ke

    Published 2009-11-01

    In order to model the growth circumstance of Torreya grandis Merrillii, which is a precious economic species peculiar in China, extraction of its distributing information is of great importance. Based on the IKONOS remote sensing imagery, object-oriented method was used, which provided the function...

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    Detecting urban vegetation categories based on object-oriented method from IKONOS data

    Detecting urban vegetation categories based on object-oriented method from IKONOS data by ZHANG Xiu-ying, FENG Xue-zhi, DING Xiao-dong, WANG Ke

    Published 2007-09-01

    Based on urban vegetation characteristics of spectrum, texture, geometry and location, the object-oriented method was used to identify urban vegetation categories from IKONOS imagery. Firstly, vegetated area and non-vegetated area were separated by the threshold of NDVI and digital number (DN) value...

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