|
|||||
|
|
| 改进Canny算法的CT图像环形伪影校正 | |
| 引用本文： | 王珏,黄苏红,蔡玉芳.改进Canny算法的CT图像环形伪影校正[J].光学精密工程,2011,19(11):2767-2773. |
| 作者姓名： | 王珏 黄苏红 蔡玉芳 |
| 作者单位： | 1. 重庆大学光电技术及系统教育部重点实验室ICT研究中心,重庆400044;重庆大学自动化学院,重庆400044 2. 重庆大学自动化学院,重庆,400044 3. 重庆大学光电技术及系统教育部重点实验室ICT研究中心,重庆,400044 |
| 基金项目： | 国家自然科学基金资助项目(No.60972104); 中央高校基本科研业务费资助(No.CDJXS11171159) |
| 摘 要： | 为去除计算层析(CT)图像中的环形伪影,提高CT图像的定性分析能力和定量测量精度,提出了一种改进的Can-ny算法用于环形伪影校正.首先采用S-L滤波器对原始投影数据进行滤波,增强伪影信息.接着,设定角度阈值对梯度方向进行限制,排除斜角方向边缘的检测,实现竖直方向边缘点检测.然后,设置梯度阈值和链长度阈值实现伪影边缘点... |
| 关 键 词： | 计算层析(CT)图像 环形伪影 投影正弦图 伪影校正 |
Improved Canny algorithm for correcting ring artifacts of CT images |
|
| WANG Jue,HUANG Su-hong,CAI Yu-fang.Improved Canny algorithm for correcting ring artifacts of CT images[J].Optics and Precision Engineering,2011,19(11):2767-2773. | |
| Authors: | WANG Jue HUANG Su-hong CAI Yu-fang |
| Affiliation: | WANG Jue1,2,HUANG Su-hong2,CAI Yu-fang1 (1.ICT Research Center,Key Laboratory of Optoelectronic Technology and System of the Education Ministry of China,Chongqing University,Chongqing 400044,China,2.College of Automation,China) |
| Abstract: | An improved Canny algorithm is proposed to remove ring artifacts in Computerized Tomography(CT) images and to improve their qualitative analysis ability and quantitative measurement precision.S-L filter is adopted to filter original projection data and enhance artifact information before using Gaussian filter.Then,the angle thresholds are set to limit gradient direction,and to exclude diagonal direction edge detection and implement vertical direction edge detection.Furthermore,a gradient threshold and an an... |
| Keywords: | Computed Tomography(CT) image ring artifact projection sinogram artifact correction |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |