matlab 对图像进行小波重建 本函数输入为图像经小波分解后处理过的一个低通分量和相应的三个方向（水平、垂直、斜向）的高频分量，输出重建图像-matlab image wavelet reconstruction of the function of the input image after wavelet decomposition treated by a low-pass component and a corresponding three directions (horizontal, vertical, diagonal) high-frequency component of the output of the reconstructed image