在matlab环境中自动识别连通区域的大小,计算一维光子晶体的透射特性和反射特性，包括面积、周长、矩形度、伸长度。- Automatic identification in the matlab environment the size of the connected area, Calculated transmission characteristics and reflection characteristics of the one-dimensional photonic crystals, Including the area, perimeter, rectangular, elongation.