differential rectification meaning in English

图象差异纠正
微分纠正

It study carefully the distortion of the remote sensing imagery , the rectification of the radiant quantity , the rs image strengthen and the color fusion . based on these achievements above , we do experiment on the differential rectification , the rs image fusion , the object determining and the exchange for the different format data , propose the plan and flow chart of the terrain map rectification by the rs imagery . we demonstrate the method for the target location and the direction outside by the rs imagery and how to select the reference point and read the information of the rs imagery
本文阐述了利用航天遥感影像进行1 : 25万地形图数据库更新的必要性和可行性，在对spot和landsat遥感影像特性进行分析的基础上，对航天遥感影像的系统变形、辐射量校正和影像增强与彩色融合等内容进行了认真研究，并在此基础上对航天遥感影像数字微分纠正、影像融合、地物判读、数据库数据格式转换、基于遥感影像的地形图修测等方法进行了具体试验，提出了利用遥感影像进行地形图修测的具体方法和作业流程。