基于尺度分析的断层热信息遥感图像增强方法--以江山-绍兴断裂金衢段为例

Remote sensing image enhancement method of the fault thermal information based on scale analysis:A case study of Jiangshan-Shaoxing fault between Jinhua and Quzhou of Zhejiang Province,China

根据热红外遥感影像上断层热信息具有特征几何尺寸的特点,以断层系统热信息分析为目标,提出了一种基于尺度分析的断层热信息遥感图像增强方法.在江山—绍兴断裂金衢段的实际工作中,通过断层两侧地表高温区域尺度分析、特征尺度网格抽样和样本插值成图等步骤,有效地降低了背景干扰,客观地描述了研究区与断层相关的热信息的空间分布形态及特征.多种尺度分析结果表明,在9km2特征尺度上,断层热信息特征规律明显:地表高温区域沿北东走向的江山—绍兴断裂带和常山—漓渚断裂带两侧分布,呈线性特征;在淳安—温州断裂带与衢州—天台断裂带交叉位置地表温度较高.研究结果经实测资料验证,基本特征与实测资料相符.

According to the feature that the fault thermal information reflected on the thermal infrared remote sensing image has its special geometric size, the paper introduced a remote sensing image enhancement method of the fault thermal information based on scale analysis. In the case study of Jiangshan-Shaoxing fault between Jinhua and Quzhou of Zhejiang Province in China, the method effectively reduced the background interference, and objectively characterized the spatial distribution and characteristics of the thermal information of all the faults, by using the procedures of analyzing the geometric scale of the high land surface temperature （LST） regions on both sides of each fault, image grid sampling with special scale, and mapping by sample interpolation. The results of multi-scale analyzing indicated that, on the analysis scale of 9 square kilometers, the characteristics of the thermal information of all the faults are very clear, that the high LST regions are linearly distributed along Jiangshan-Shaoxing fault and Changshan- Lizhu fault, and are concentrated in the intersectional area of Chun＇ an-Wenzhou fault with Quzhou-Tiantai fault. The results were validated by the field survey data.