图像的编解码主要用于图像的格式存储。收缩和膨胀是数学形态学最基本的变换，数学形态学的应用几乎覆盖了图像处理的所有领域，给出利用数学形态学对二值图像处理的一些运算。-Image codec is mainly used for image storage format. Contraction and expansion is the most fundamental transformation of mathematical morphology, mathematical morphology applications cover almost all areas of image processing is given to the two values using mathematical morphology image processing some of the operations.