Advanced Remote Sensing, 2nd Edition

2.3. Geometric rectification of a single remote sensing image

The geometric rectification of satellite remote sensing imagery is the process of projecting one original image into a specific reference coordinate system, eliminating the geometric distortions of the original image and producing a new image that satisfies the requirements of the map projection or the graphical expression. This process consists of the following two main steps: the first step is the transformation of the image coordinates, which requires the transformation of the image coordinates into the map projection coordinates or the object space coordinates; the second step is the resampling of the gray value after the transformation of the image coordinates. The process of ...