国防科技大学学报2012，Vol.34Issue(1)：155-159,5.
一种新的小波收缩统一阈值函数
A New uniform threshold function of wave-shrink
摘要
Abstract
A new uniform threshold function of wave-shrink for image denoising is proposed. The new function has the advantage of satisfying the shrinkage condition. By changing the parameter u,we can change the trend of this new function, which makes it possible to find an adaptive method whenever using the wavelet shrinkage method for image denoising. Finally, efficient formulas for computing mean , variance and risk of the new uniform threshold function are derived. Numerical experiments and comparative studies are performed, demonstrating the effectiveness of our threshold function. Additionally, the proposed new function can also give better performance in terms of both PSNR and in visual quality.关键词
小波变换/硬阈值函数/软阈值函数/统一阈值函数/图像去噪Key words
wavelet transform/ hard-threshold function/ soft-threshold function/ uniform threshold function/ image denoising分类
信息技术与安全科学引用本文复制引用
李财莲,李志先,孙即祥,康耀红..一种新的小波收缩统一阈值函数[J].国防科技大学学报,2012,34(1):155-159,5.基金项目
国家自然科学基金资助项目(40901216) （40901216）
