说明：  掌握小波分析在图像分析等各方面的应用。对图像进行二维离散小波分解、多尺度二维离散小波分解 并提取二维小波分解的高频系数和低频系数， 画出原始图形并显示分解结果。
(Master the application of wavelet analysis in image analysis and other applications. Image two-dimensional discrete wavelet decomposition, multi-scale two-dimensional discrete wavelet decomposition and extraction of high-frequency two-dimensional wavelet decomposition coefficients and low-frequency coefficients, the original graphics to draw and display the result of decomposition.)