能做正六边形和四边形的模拟图，给定中心坐标和边长即可实现灰度不均的模拟图，同时还能添加高斯噪声和高斯模糊-Can do hexagon and quadrilateral simulation diagram, the uneven gray scale can be realized in distance around a given center coordinates, and simulated figure, at the same time also can add gaussian noise and gaussian blur