中文说明：主要对阈值进行改进，用自定义的阈值进行去噪,并且与常用阈值进行比较，其性能要优于其他的的四种阈值。
English Description：
This paper mainly improves the threshold, uses the custom threshold to denoise, and compares with the common threshold, its performance is better than the other four thresholds.