小波变换在数字图像中的应用，主要分析了基于小波变换的图像分解和图像压缩的技术,并运用Matlab 软件对图像进行分解,然后-This paper analysed the technologies of the picture decomposition and compression basecd on wavelet transform ,and decomposing the picture using Matlab ,and then picked up the low frequency information of approximate former picture ,and achieved goals of picture was compression.