中文摘要：

计算机断层技术（CT）的出现,是人类医学史上的一大突破,标志着现代医学正式跨入数字化时代。CT图像的三维重建是医学影像学中的一个重要领域,同时口腔CT又是使用率最高的领域之一。作为图像分割的一种方法,利用开源计算机视觉库（OpenCV）具有多平台支持,多语言接口,强移植性,快处理速度等优点,使用不同的边缘提取算子提取CT图像的轮廓并进行比较,通过CT机扫描而得的图像进行双边滤波器平滑滤波,边缘保留,Canny算子边缘提取等图像预处理。在算法实现上提出了方便调试的轨迹条,可以很好地对各种参数进行可视的实时调节,便于找出最优方案。

英文摘要：

The advent of computed tomography technique （CT） is a breakthrough of human medical history,marking the modem medicine officially entered the digital age.CT image 3D reconstruction is an important field of Medical Imageology,and oral CT is one of the fields having highest utilization rate.As a method of image segmentation,using OpenCV has some advantages such as multiple platform supporting, multilingual interface,strong portability,and quick processing.Using different edge detection operators to extract the outline of CT image and compare,the image preprocessing, such as tow-side filter smoothing filtering,edges preserv!ng,and Canny operator edge extrcation,is executed to the images from CT scanning. A track bar easy to test is put florwand for algorithm implementation,which can make visible true time control to a variety of parameters to conveniently find optimal scheme.