脑外科CT图像的综合边缘提取算法

为了实现大脑的三维重建，准确提取二维图像中的边缘成了首要解决的问题。常用的几种经典边缘检测算子对噪声比较敏感，容易造成虚假或不连续的边缘。针对此问题，提出基于Canny算子并结合图像增强和数学形态学的综合边缘提取算法。该算法首先对原始图像进行增强，以便于计算机的分析；然后利用Canny算子对CT图片进行边缘提取，该算子...

An integrated algorithm of edge detection of brain surgery CT image

In order to achieve the three-dimensional reconstruction of the brain, it is the first issue of extracting the edge of two-dimensional image accurately . Several common classic edge detection operators were sensitive to noise, and they were easy to cause a false or discontinuous edge. For this problem, this paper presented a integrated edge detection algorithm,which was based on Canny operator and the combination of image enhancement and mathematical morphology. First, we did a image enhancement to the original images, which was convenient for the computer analysis; then the edge of brain image was extracted by the Canny operator, the operator has two advantages of non-maxima suppression and double-threshold method to connect the edge, but the non-edge point was easily detected the edge, and there was still some edges discontinuity; lastly, the extracted edge was disposed by the expansion of the mathematical morphology method. Experimental result shows that the extracted edge is smooth and continuous, it lay a solid foundation for the three-dimensional reconstruction of the brain in future.