variate-difference method的用法和樣例：
例句
- The merits and demerits of frame differential method in motional detecting were analyzed and optimized.
詳細討論了運動檢測中幀差法的優缺點，並設計了快速實現演算法，同時提出了對原有方法的改進。 - A novel algorithm for moving detection, which employed adaptive background subtraction and symmetrical differencing method, was presented.
摘要提出一種基於動態閾值對稱差分和背景差法的運動對象檢測演算法。
