Random noise are minished by using methodofdifference and flatness .
利用差分法、平滑法减小测量结果中的随机噪声;
2
Using by the methodofDifference Analyze and the theory of Regression Analyze, the analyzed the spatial characteristic of vegetation change in arid land.
在差值分析和回归理论的支持下,分析了干旱区植被变化的空间特征;
3
Meantime, differential signal is distilled by nonlinear tracking-differentiator instead of the methodofdifference, which improves the quality of differential signal.