一种X射线图像增强方案  

An Image Enhancement Method of X-ray Image

作　　者：崔玉柱[1] 刘清华[1] 

机构地区：[1]国家数字化X射线成像仪器中心中国工程物理研究院应用电子学研究所,绵阳621000

出　　处：《无损检测》2014年第1期45-48,共4页Nondestructive Testing

摘　　要：X射线图像信息量大,通常不止一个灰度层次,运用图像增强方法可以提高图像对比度和像质,达到细节区域的最佳视觉效果。笔者首先分析了图像直方图层次;然后针对不同层次的图像内容,采用模糊松弛迭代算法建立了模糊集映射函数,对射线图像进行迭代运算;最后,使用迭代处理结果进一步做Sobel边缘检测算子处理和均值滤波处理。试验表明,该算法增强了图像视觉效果,且增强了图像中不同灰度层次的边缘细节信息,使得图像层次感更加明显。X-ray image possesses large quantity of information,and there is usually a plurality of gray level information in it.Image enhancement processing,in common use,can enhance image contrast and improve image quality.And the detail information of X-ray image achieves the best visual effect.The paper first analyzes the different hierarchical image content of X-ray image,which possess large amount of information as well as background noise.Then,it establishes mapping function of X-ray image by using fuzzy function and iterative procedure,which can be achieved for distinguishing different levels of X-ray image content.Finally,the paper processes X-ray image separately by using Sobel edge detection operator and mean filter.The experimental results demonstrate that this proposed enhancement method can receive better visual acuity,and there is a distinct hierarchical enhancement of X-ray image.

关 键 词：X射线图像 模糊松弛迭代算法 SOBEL边缘检测 均值滤波 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] O434.1[自动化与计算机技术—计算机科学与技术]