首页 >  1998, Vol. 2, Issue (2) : 125-130

摘要

全文摘要次数: 3509 全文下载次数: 16
引用本文:

DOI:

10.11834/jrs.19980209

收稿日期:

1997-03-21

修改日期:

1997-10-13

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应用NOAA/AVHRR数据测算局地水稻种植面积方法研究
1.中国气象科学研究院,北京100081;2.南京气象学院,南京210044
摘要:

本文采用在模糊监督分类中增加迭代过程的方法──模糊监督分类-迭代法, 在分解混合像元的基础上, 利用AVHRR数据求算水稻种植面积。根据稻田与旱地存在温度差异的特点, 在分析AVHRR数据统计特征的基础上, 增加了第3和4两通道参加模糊监督分类, 从而增加了分类像元值矢量维数, 增强了对水稻的鉴别能力。所采用的迭代法是收敛且有效的, 经本方法输出的水稻种植面积百分含量图与实际水稻分布十分吻合, 测算出的面积值与TM和实地调查结果相比, 有较高的精度。

Study on Methods of Rice Planting Area Estimation at Regional Scale Using NOAA/AVHRR Data
Abstract:

Fuzzy supervised classification-iteration method was used in evaluating the rice planting area on a mixed pixel signal unmaxing basis. Channels 3 and 4 of AVHRR were used in this study according to the fact that the temperature of rice fields different from that of rainfalled-crop fields and based on the analysis of statistical characteristic. The additional channels in middle infrared and thermal infrared allowed rice to be identified easier than using the visible and near-infrared channels alone, and added the dimensional number of the pixel value vector in the characteristic. The iterative process is effective and convergen. The pixel proportion images of rice planting area produced in this study have a good consistence with the ground truth Compared with rice area abtained form TM image and field survey, this method has a high accuracy.

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