基于小波递归滤波的X射线图像实时降噪技术

摘要

通常射线图像降噪常常利用空间域滤波或时间域滤波,这两种方法都只考虑了各自域的像素之间的相关性,将空间滤波方法与时间滤波方法结合起来,可以达到比它们单独使用更好的效果.帧内与帧间结合的数字视频降噪方法,是将递归滤波和小波算法相结合的复合算法.试验证明该方法可以有效去除射线图像随机噪声.%The radiographic image noise often use a space domain filtering or a time domain filtering, these two methods have only considered the respective domain of pixels of the correlation among. It can achieve better effect than they used alone by combining the spatial filtering method with time filtering. It puts forward a noise reduction method of digital video with the combination of the intraframe and interframe. It is a composite algorithm with the connection of the recursive filtering algorithm and wavelet algorithm. Experiment proves that this method can effectively eliminate the X-ray imaging random noise.