The method research of Envisat-1 ASAR data preprocessing includes radiometric calibration, geometrical correction and speckle reduction.
主要的研究内容如下：(1)ASAR数据预处理方法研究，包括辐射定标、几何校正和斑点噪声的去除。
Through concrete analysis on the source of image errors, this paper expounds the ways of making geometrical correction for image errors by using digital method.
文章通过对图象误差来源的具体分析，阐述了利用数字方法对图象误差进行几何纠正的方法。
Accurate measurement of geometrical distortion of image display system with wide-angle objective lens is the precondition and key of digital distortion correction.
准确地测量含有广角耦合物镜的图像显示系统的几何畸变是实现图像显示系统几何畸变数字校正的前提和关键。
According to the reasons for the geometrical distortion of digital images, an auto-correction method is proposed.
通过分析数字图像几何畸变产生的机制，提出一种数字图像几何畸变自动校正的方法。
According to the reasons for the geometrical distortion of digital images, an auto-correction method is proposed.
通过分析数字图像几何畸变产生的机制，提出一种数字图像几何畸变自动校正的方法。
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