基于高光谱分形分析的烟草冠层生长状况监测  

Monitoring Tobacco Canopy Growth Status Based on Hyperspectral Fractal Analysis

作　　者：齐婧冰 樊风雷[1] 郭治兴[2] 

机构地区：[1]华南师范大学地理科学学院,广州510631 [2]广东省生态环境与土壤研究所,广州510650

出　　处：《华南师范大学学报（自然科学版）》2016年第1期94-100,共7页Journal of South China Normal University(Natural Science Edition)

基　　金：国家自然科学基金项目(41201432);广东省烟草专卖局科技项目(粤烟科(2012)26)

摘　　要：使用野外光谱仪进行野外测量,得到烟草植株冠层不同生育期以及不同健康状况的反射光谱曲线.并在分析光谱特征参数如红边位置、红边面积、绿峰反射高度的基础上,利用分形理论对反射光谱曲线进行分形测量并用分形维数定量反映其健康状况.结果表明:(1)分形维数随着烟草植株的生长发育呈现先升高后降低的趋势,与3个光谱参数的变化基本吻合;(2)分形维数与红边位置、红边面积、绿峰反射高度均成正相关关系,其相关系数分别为0.77、0.91和0.88;(3)病害烟草植株冠层光谱曲线的分形维数明显小于健康烟草冠层.因此,分形维数能够作为一个新的综合参数来客观反映烟草冠层所处的健康状况,为烟草植株生长状况监测提供科学依据.Lots of canopy spectral curves are generated using AvaSpec-4 optical spectrum instrument in order to de- scribe the different growth stage and health status of tobacco. On the basis of analyzing the spectral characteristic parameters such as the red edge position, the area of the red edge, and the height of the green peak, the fractal theory are used to measure the fractal dimensions of the reflective spectral curves in order to analyze the health sta- tus of tobacco. The results show that ： （ 1 ） the fractal dimension presents a trend of decrease after the first increase along with the growing of tobacco, and it is in accordance with the change of the three spectral characteristic param- eters, （2） fractal dimension has a positive correlation with the three characteristic parameters, and the correlation coefficient is 0.77, 0. 91, 0. 88 respectively, （3） the fractal dimension of the unhealthy tobacco is lower than the normal obviously. Thus, the fractal dimension of hyperspectral curve can serve as a new comprehensive parameter to analyze quantitatively the health status of tobacco and provide a scientific basis for growing situation monitoring of tobacco.

关 键 词：烟草 高光谱 冠层 分形维数 健康状况 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]