经过小波变换的图像具有频谱划、方向选择、多分辨率分析和天然塔式数据结构特点。基于小波变换这些特性，讨论了MATLAB语言环境下图像压缩，图像去噪，图像融合，图像分解，图像增强的基本方法。-After wavelet transform spectrum delimits, image has direction choosing, multi-resolution analysis and natural tower structure characteristics data. Based on wavelet transform these characteristics, discusses the MATLAB language environment image compression, image denoising, image fusion, image decomposition, the basic method of image enhancement.