摘要： 方向小波变换(SAWT)是小波变换(WT)的多方向扩展,它的基是各向异性的,具有多尺度、多方向的图像表示特性。SAWT不能恒保持多分辨率尺度关系,不能较好地表示图像中的平滑区域,因此利用WT和SAWT构造了一种新的多尺度、多方向且能保持多分辨率尺度关系的小波方向波变换。为了验证该变换的有效性,利用其进行了图像去噪实验。实验结果表明,所提方法能够很好地表示图像中的平滑区域和细节信息,并且能获得更高的峰值信噪比和结构相似性。
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