The trackability limitation of current gradient algorithm is discussed. A new algorithm, named variable parameter gradient estimation algorithm with local polynomial approximation is proposed.
本文分析了梯度辨识算法跟踪时变系统的缺点，提出了一种新的基于局部多项式逼近的变参数梯度估计算法。
During volume rendering, gradient will be used both on the procedure Classification and Shading. So rapidity and accuracy of gradient estimation is important to high quality rendering algorithm.
体绘制流程中，梯度在数据分类和明暗计算中都要用到，因此快速准确的梯度估算对高质量的体绘制算法至关重要。
During volume rendering, gradient will be used both on the procedure Classification and Shading. So rapidity and accuracy of gradient estimation is important to high quality rendering algorithm.
体绘制流程中，梯度在数据分类和明暗计算中都要用到，因此快速准确的梯度估算对高质量的体绘制算法至关重要。
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