光栏法的基本思想是（图1）：定义一个扇形区域，通过判断曲线上的点在扇形外还是在扇形内，确定保留还是舍去。-The basic idea of ​ ​ light field is (Figure 1): definition of a fan-shaped region, by determining the point on the curve outside the sector or sector, to identify the retained or discarded.