摘要
提出了一种自适应提升小波收缩阈值去噪方法,改进了提升算法中预测算子的计算方法,在更新算子中引入了自适应,最后在阈值处理方面使用了实践证明效果比较好的收缩阈值,仿真证明,经去噪后,图像在性能指标上有一定的提高,图像的细节能够很好地保持。
This paper develops algorithm adaptive wavelet transform based on the lifting scheme. The method is applied to the signal denoise by the contract threshold, and it improves the calculating method of predictor;matches a desired signal by adaptive criteria. The numerical experiment shows that the method is efficiency. The advantages of lifting scheme rests on its flexible designed.
出处
《中国民航学院学报》
2005年第3期42-45,共4页
Journal of Civil Aviation University of China
基金
中国民用航空总局教育教学研究基金(03-3-08).
关键词
小波变换
去噪
阈值
自适应
提升算法
wavelet transform
denoise
threshold
adaptive
lifting scheme
