摘要
由于医学硬件设备和辐射剂量的限制,为了获得高分辨力、高质量的CT图像以协助医生进行诊断和治疗,通常需要从软件方面将CT图像放大或局部CT图像放大,考虑到CT图像边缘在CT图像处理中的重要性,提出一种基于边缘保持的CT图像插值算法,该算法包括两个步骤,第一步对原图像进行边缘提取以及沿边缘方向进行边缘插值放大;第二步进行图像平滑区域的双线性插值放大。该算法能很好地保护图像的边缘细节,文中给出了放大实例,实验结果证明了算法的有效性。
Due to limit of medical equipment and hardware of the radiation, in order to obtain high-resolution, high-quality CT image to help doctors diagnose and treatment.We need to enlarge CT image or partial CT image from the software usually.Taking the importance of the edge of the CT image in image processing into account, an CT image interpolation expansion algorithm based on edge-preserving was proposed,which include two steps.Firstly,the edge of image is extracted, then these edge pixels of the image is interpolated along the edge direction.Secondly,the non-edge area is bilinearly interpolated.The experimental results shows that the interpolation results by the proposed approach are better than those by three other interpolation approaches in comparison.
出处
《电脑与信息技术》
2009年第1期39-42,共4页
Computer and Information Technology
关键词
CT图像
边缘提取
边缘保护
图像插值
双线性插值
CT image
edge extracting
edge-preserving
image interpolation
bilinear interpolation
