The article based on double trapezoidal algorithm puts forward double trapezoidal recursive algorithm for two-dimensional numerical integration.
在双梯形算法的基础上,提出了二重数值积分双梯形递推算法,给出了用C++语言编程实现双梯形递推算法的技术要点,通过对同一实例进行不同的计算实验,测试并比较了复化双梯形算法与双梯形递推算法各自运行时占用Pentium150CPU的时间,实验表明:双梯形递推算法是一种快速计算二重积分、节省CPU时间的高效方法。
According to the theory of mathematical morphological and characteristics of wood image,proper structuring elements were selected to obtain mathematical morphological double-gradient algorithm via corrosion,expansion,and weighted array of opening operation and closing operation,which were then applied to edge detection of rotten wood image.
根据数学形态学的思想和木材图像的特性,选取适当的结构元素,通过腐蚀、膨胀、开与闭运算的加权组合,构造出形态学双梯度算法,并将它应用于木材腐朽图像的边缘检测。