作 者：姚成[1] 赵晋陵[2] YAO Cheng, ZHA0Jinling （1. Department of Computer, Anhui Finance ＆ Trade Vocational College, Hefei 230601; 2. Key Laboratory of Intelligent Computing ＆ Signal Processing, Ministry of Education, Anhui University, Hefei 230039） 机构地区：[1]安徽财贸职业学院电子信息系,合肥230601 [2]安徽大学计算智能与信号处理教育部重点实验室,合肥230039 出 处：《安徽农业大学学报》2017年第2期316-321,共6页Journal of Anhui Agricultural University 基 金：安徽省高等教育振兴计划专业带头人项目（皖教秘人〔2017〕189号）; 安徽省自然科学基金（1408085QF126）共同资助 摘 要：选取泰国THEOS（Thailand earth observation satellite）卫星影像作为探讨对象,提出从图谱成像质量和专题地类提取性能评价影像运用潜能。采用不同地类的像元均值表征影像的光谱质量;选取灰度共生矩阵GLCM（Grey level co-occurrence matrix）计算得到的角二阶矩ASM（angular second moment）、相关性（correlation）、对比度（contrast）和熵（entropy）评价影像的图像质量;利用面向对象的分类措施评价影像的地物解析能力。结果表明：（1）耕地、城市和林地的均值分别为121.14、73.70和137.62,说明THEOS影像对不同地物有较好的区分性能;（2）对比度和熵的均值最大（分别为18.93和2.88）,可以用于表征THEOS影像丰富的纹理信息;（3）2 m分辨率THEOS融合影像可以较好地提取均一地类,但解析多种地类混合的区域效果较差。本探讨可为THEOS卫星数据在我国的广泛运用提供参考。The THEOS （Thailand earth observation satellite） image quality was evaluated through the spec- tral and texture quality for imaging and the capability for identifying thematic land-cover types of three methods. Firstly, the mean of pixel values were used to assess the spectral discrimination. Secondly, the ASM （Angular second moment）, correlation, contrast and entropy, derived from the GLCM （Grey level co-occurrence matrix）, were used to represent the texture features of imagery. Finally, the object-oriented classification method was used to identify the thematic land-cover types. The analysis results were as follow. （1） The mean grey values of crop- land, built-up and forestland were 121.14, 73.70 and 137.62, respectively, which indicated that THEOS imagery has good capability in identification of different land cover types; （2） The contrast and entropy （their means were 18.93 and 2.88, respectively） were better to show the texture information; （3） The results were good for homoge- nous land covers, but poor for the regions with the mixed types of land covers. This study provides a good refer- ence for a wide utilization of THEOS in China 关 键 词：多光谱遥感 ，泰语论文，泰语毕业论文 |
