用小波变换进行图像增强，先对原始图像进行非下采样的小波分解，在对每一层的高频分解系数进行处理，得到变换后的小波系数，再进行小波重构。-Image enhancement using wavelet transform, the original image and non-sampling wavelet decomposition in the high frequency decomposition coefficients of each layer, get the wavelet co

非下采样contourlet是超小波的一种。具有多尺度和多方向性，解决了contourlet变换无平移不变性的缺陷。用于图纹理特征提取和图像融合的效果很好。(Non sampled contourlet is a kind of super wavelet. With multi-scale and multi directional, it solves the defect of Contourlet translation without translation invariance. F