function?X?=?den1（x?wname?n?thr）
%?半軟閾值去噪方法

thr1?=?0.5?*?thr;
[C?S]?=?wavedec2（x?n?wname）;?????????????????????%對(duì)圖像進(jìn)行小波分解
dcoef?=?C（?prod（S（1?:））?+?1?:?end）;????????????????%高頻部分系數(shù)

ind?=?find（?abs（dcoef）?C（ind）?=?0;?????????????????????????????????????????%???直接置零

ind?=?find（?abs（dcoef）?>=?thr1?&?a