Scale is different for each remote sensing image analysis. To show the variety of pattern and process correctly, it is important to understand image objects scale effect in scaling courses, and to select the optimal scale for special class abstraction.

• 每一个遥感专题应用任务对于影像分析中尺度的需求是不一样的，要正确反映测区内格局与过程的变化特征，了解多尺度转换过程中影像对象信息的变化效应，选择特定类别信息提取的最优尺度成为面向对象影像分析中关注的重点。