【摘要】 针对传统硬阈值函数的不连续性和软阈值函数存在恒定偏差的不足，提出一种新的具有连续性、渐近性和灵活调节性的改进阈值函数。具体地，首先选取改进的固定阈值并经过实验选择合适的小波基，然后通过增加调节参数来降低阈值函数的恒定偏差，最后通过实验模拟验证了本文方法在图像相似性评价标准上去噪效果的优越性。更多还原

【Abstract】 In view of the discontinuity in the traditional hard threshold function and the constant deviation in the soft threshold function, we propose a new improved threshold function with continuity, asymptoticity and adjustability. Specifically, we first select the improved fixed threshold and select the appropriate wavelet base through experiment, and then increase the adjustment parameters to reduce the constant deviation of the threshold function. Finally, experimental simulations verify that our method has a better denoising effect than the traditional method in terms of image similarity evaluation criteria.更多还原