双树复小波(DT-CWT)是传统单小波的推广,该变换具有平移不变性、好的方向选择性和高效的计算效率,因此在图像融合领域较小波更具优势(Double tree complex wavelet (DT-CWT) is a generalization of traditional Dan Xiaobo, which has translation invariance, good direction selectivity and efficient computation efficiency.