基于多时相遥感影像的福州市热环境监测

根据彩色合成原理,对3个时相TM影像的热红外波段进行假彩色合成,利用合成图上不同的色调分析城市热环境的变化趋势;并将彩色合成图进行HLS变换,利用变换后的色度、饱和度和亮度3个分量将福州市热环境变化类型划分成热岛区、热环境缓解区、热环境波动区、热环境恶化区4大类,并分析了这几种热环境变化类型的分布情况和成因.

Monitoring of Fuzhou''''s heat environment on basis of multi-temporal RS information

On the basis of color synthesis theory,color integration is conducted on the thermal infrared bands of the TM images in 3 different periods.An analysis is made into the trend of changes of Fuzhou ' s urban heat environment,with HLS transformation conducted on the color integration images.The 3 transformed factors of H(hue),S(saturation) and L(lightness) are then employed to divide Fuzhou ' s heat environment into areas of 4 categories,including the areas featuring heat islands,the areas typical of improved heat environment,the areas featured with fluctuated heat environment and the areas of deteriorated heat environment.In the end it analyses the distribution and causes of the 4 different heat environment.