matlab实现对火焰在rgb模型下出的特征提取，对于二维数组来说，它的size是指它的行数和列数；三维数组是指它的各个维的维度，可以理解为m行，n列和p层，即一共有m*n*p个元素-matlab to achieve extraction of the characteristics of the flame in the rgb model for two-dimensional array, its size is the number of rows and columns three