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首页> 外文会议>5th International Symposium on Test and Measurement (ISTM/2003) Vol.3 Jun 1-5, 2003 Shenzhen, China >The Imaging Filter and Noise Analyse Based on Low Intense X-ray Image System
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The Imaging Filter and Noise Analyse Based on Low Intense X-ray Image System

机译：基于低强度X射线图像系统的成像滤波与噪声分析

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摘要

New structure of a low intensity x-ray image system is mainly made of plane plate mode x-ray intensifier of single proximity focus and CCD data acquisition and processing system. By the system composition, the image noise source of low x-ray imaging system is constituted with quantum noise, paniculate noise and dark noise of CCD. The compound methods of the "multi-frame mean + adaptive median filter" is submitted which deals with the imaging noise. Firstly, some frame images is superimposed, then mean image is calculated from those images, which is under the principle of noise non-correlation. By the method, the information is enhanced and the noise is compressed. Secondly, based on the standard median filtering algorithm, the adaptive median filter is ordered as much as possible to preserving the detail of the image when the noise are removed. By the calculation of PSNP, the methods are supper to any single method greatly. And the effect of image filter is satisfied.
机译：低强度X射线图像系统的新结构主要由单接近焦点的平板模式X射线增强器和CCD数据采集与处理系统组成。通过系统组成，低X射线成像系统的图像噪声源由CCD的量子噪声，微粒噪声和暗噪声组成。提出了处理图像噪声的“多帧均值+自适应中值滤波器”的复合方法。首先，将一些帧图像进行叠加，然后从这些图像中计算出均值图像，这是在噪声不相关原理下进行的。通过该方法，增强了信息并且压缩了噪声。其次，基于标准的中值滤波算法，在去除噪声时，尽可能地对自适应中值滤波器进行排序，以保留图像的细节。通过PSNP的计算，这些方法大大优于任何一种方法。并满足图像过滤的效果。

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