遥感图像数字处理新方法-模拟反射率图像

随着遥感技术的飞速发展及图像分辨率的提高,对改善图像质量的处理技术要求越来越高,现有的处理手段已不能满足新的需求,其中遥感数据信息的完整利用尤为突出。TM数据有七个波段,一般只利用其中三个波段的信息,其它波段的信息没有被利用。基于TM数据的模拟反射率图则囊括TM数据七个波段的信息,信息利用完整,图像质量得到了很大提高。这里严格推导了基于TM数据构建模拟反射率图的原理和构建流程,并根据实验结果,总结了基于TM数据的模拟反射率图的特点主要有:①阴影区的分辨率得到了提高;②整体图像质量提高,图像处理由传统的不定量(拉伸)处理变为定量(特定处理工艺)处理;③信息利用完整;④对水体有一定程度的透视作用。

The image of simulated reflectance - a new method of digital image processing

With the development of remote sensing technique and the improvement of the image resolution,the requirement for the processing methods of higher quality imagie is increasing and present processing methods have not satisfied this goal,especial how to fully use the remote sensing data information.TM data with seven wave bands,in general,only three bands information of them are used.The simulated reflectance imagine based on TM data has all seven bands information of TM data,and the imagine quality has been improved obviously because of full information.The authors have strictly deduced the principals and building course of simulated reflectance imagine based on TM data,and according to experimental results,have concluded the main characters of simulated reflectance image,which are as the following:(1)Improved the resolution of shadow area.(2)Improved the quality of imagie.The image processing has been changed from traditional non-quantitative(stretching)processing to quantitative(special processing technique)processing.(3)Full using of information.(4)With some perspective effects to water.