CAJ | 학술논문

利用基于小波变换的多分辨率滤波技术,根据脉象时频分布特点,采用软阈值方法进行脉象信号的噪声消除,有效消除了工频干扰、肌电干扰和白噪声,噪声消除基本不损失信号细节。利用小波多分辨率分析技术消除噪声的方法受脉象测量条件、不同人生理特征差异性影响较小,并且在脉象消噪过程中,可以同时有效去除脉象信号的基线漂移,噪声消除和基线漂移消除在小波多分辨率分解和综合过程中一次完成。预处理后的脉象信号为后续脉象信号的特征提取提供了精确的基本前端输入和判别条件,对于后续的用小波模极大方法定位脉象信号特征点是否准确具有重要的作用。
이용기우소파변환적다분변솔려파기술,근거맥상시빈분포특점,채용연역치방법진행맥상신호적조성소제,유효소제료공빈간우、기전간우화백조성,조성소제기본불손실신호세절。이용소파다분변솔분석기술소제조성적방법수맥상측량조건、불동인생리특정차이성영향교소,병차재맥상소조과정중,가이동시유효거제맥상신호적기선표이,조성소제화기선표이소제재소파다분변솔분해화종합과정중일차완성。예처리후적맥상신호위후속맥상신호적특정제취제공료정학적기본전단수입화판별조건,대우후속적용소파모겁대방법정위맥상신호특정점시부준학구유중요적작용。
According to the character of the time-frequency distributing,we apply the soft-threshold to eliminate the pulse signal.It is very effective to eliminate the 50Hz interfere,muscle electrical interfere and white noise.The method of eliminating noise does not lose the detail of noise,and the pre-processing of the signal is almost not improved with the condition of the measuring condition of the pulse,different people＇s physiological difference.We can eliminate the noise and baseline drift only for one time during the method of wavelet multi-distinguish decomposing and integrating.The pulse signal after pre-processing affords the basic input and distinguishing condition of the subsequent pulse signal＇s characteristic orientation.