An Image Enhancement Method of X-ray Image
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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。Abstract: 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.
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