摘要
针对软阈值和硬阈值去噪方法存在的不足,采用加权平均的思想,构造了一种基于快速离散曲波变换的新阈值函数。实验结果表明,利用新阈值函数去噪后的图像峰值信噪比明显提高,视觉效果也有较大程度的改善。
Considering the defects of the soft-threshold and hard-threshold in image denoising, a new threshold function based on the fast discrete curvelet transform is proposed. The experiment results show that the denoised image which used the new threshold function has the higher PSNR and better visual quality.
出处
《天津工程师范学院学报》
2008年第4期37-39,共3页
Journal of Tianji University of Technology and Education
基金
天津市自然科学基金资助项目(08JCYBJC12100)
关键词
快速离散曲波变换
图像去噪
阈值函数
fast discrete curvelet transform
image denoising
threshold function
