摘要
本文提出了一种X射线安检图像增强的新方法。传统X射线安检图像的对比度较小、边缘不够清晰、噪声较大,针对这些特点,本方法的思路如下:首先消除安检图像的背景区域噪声,接着利用拉普拉斯变换对图像的边缘进行增强,然后通过CLAHE(有约束的局部直方图均衡化)方法实现图像的对比度增强,最后利用双边滤波器在保持图像边缘的前提下降低图像噪声。这样一套组合方法很好地适应了X射线安检图像的特点,得到了很好的增强效果。
This paper proposes a new method for image enhancement of an X-ray screening image. Generally speaking, Image contrast of X-ray screening is smaller, the edge is not clear enough and noise of these image is unacceptable. the idea of this method is as follows：first, removing the noise of the background area of the security image, second, using the Laplace transform on the edge of the image ,third, enhancing image contrast by CLAHE （local constrained histogram equalization）, finally, using the bilateral filter to reduce image noise under the premise of maintaining the image edge. Such a combination method is perfect to correspond well to the characteristics of the traditional X-ray security screening images.
出处
《CT理论与应用研究（中英文）》
2012年第4期705-712,共8页
Computerized Tomography Theory and Applications
