自适应字典改进Canny算子CT图像分割
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摘要
首先利用自适应字典学习算法对含有较强伪影噪声和随机噪声的医学图像进行降噪;其次根据边缘的特点,将降噪后的医学图像利用改进的Canny算子对图像进行边缘检测,并利用差值把不连续的边缘连接起来;再次使用区域的连通性将相关区域合并起来;最后将感兴趣区域提取出来。介绍了基于自适应学习的字典训练算法,深入研究了CT医学图像的降噪方法,通过MATLAB平台仿真,验证了此方法的有效性。
Firstly,the noise of the medical image contain is reduced by the algorithm of adaptive dictionary learning for the strong artifact noise and random noise in this article; secondly,according to the characteristics of edge,and the medical image of noise reduction after using the improved Canny operator for edge detection and use the difference between connect the dots of the edges;thirdly,the consolidation for related areas use connectivity of region; finally,the extracted region of interest. This paper describes algorithm of training dictionary based on adaptive learning,and in-depth study algorithm of the noise reduction for the CT medical images by MATLAB simulation and verifies the validity of the method.
Firstly,the noise of the medical image contain is reduced by the algorithm of adaptive dictionary learning for the strong artifact noise and random noise in this article; secondly,according to the characteristics of edge,and the medical image of noise reduction after using the improved Canny operator for edge detection and use the difference between connect the dots of the edges;thirdly,the consolidation for related areas use connectivity of region; finally,the extracted region of interest. This paper describes algorithm of training dictionary based on adaptive learning,and in-depth study algorithm of the noise reduction for the CT medical images by MATLAB simulation and verifies the validity of the method.
引文
[1]孙黎明.图像稀疏去噪算法的并行改进研究[D].重庆:重庆大学,2011.
[2]姜鹏飞.基于稀疏表示与字典学习的图像去噪算法研究[D].西安:西安电子科技大学,2011.
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[4]李行.基于判别性降维的字典学习在人脸识别的应用[J].电视技术,2014,38(3):170-174.
[5]刘洁,龙晓莉,龙丹.基于自适应稀疏字典学习的图像盲分离技术研究[J].计算机工程与设计,2013,3(7):2483-2486.
[6]MIAO Jiaqing.Based on canny operator with regional growth combined research on accurate image segmentation algorithm[J].Materials Science,Computer and Information Technology,2014(6):2088-2092.
[7]许宏科,秦严严,陈会茹.一种基于改进Canny的边缘检测算法[J].红外技术,2014(3):210-214.
[8]张志强,宋海生.应用Otsu改进Canny算子的图像边缘检测方法[J].计算机与数字工程,2014(1):122-128.
[9]尚长春,马宏伟,安静宇.基于改进Canny算子的煤矿井下物体图像边缘检测方法研究[J].计算机工程与科学,2014(3):491-496.
[10]徐亮,魏锐.基于Canny算子的图像边缘检测优化算法[J].科技通报,2013(7):127-131.
[11]赖融,娄小平.基于自适应Canny和区域生长的滴头图像分割算法研究[J].电子技术,2013(2):7-8.
[12]苗加庆.基于自适应字典学习降噪改进的脑MRI图像分水岭精确分割算法研究[J].激光杂志,2015,36(1):35-39.
[2]姜鹏飞.基于稀疏表示与字典学习的图像去噪算法研究[D].西安:西安电子科技大学,2011.
[3]赵可,潘晋孝,孔慧华.基于字典学习方法的CT不完全投影图像重建算法[J].数学的实践与认识,2014,44(2):143-149.
[4]李行.基于判别性降维的字典学习在人脸识别的应用[J].电视技术,2014,38(3):170-174.
[5]刘洁,龙晓莉,龙丹.基于自适应稀疏字典学习的图像盲分离技术研究[J].计算机工程与设计,2013,3(7):2483-2486.
[6]MIAO Jiaqing.Based on canny operator with regional growth combined research on accurate image segmentation algorithm[J].Materials Science,Computer and Information Technology,2014(6):2088-2092.
[7]许宏科,秦严严,陈会茹.一种基于改进Canny的边缘检测算法[J].红外技术,2014(3):210-214.
[8]张志强,宋海生.应用Otsu改进Canny算子的图像边缘检测方法[J].计算机与数字工程,2014(1):122-128.
[9]尚长春,马宏伟,安静宇.基于改进Canny算子的煤矿井下物体图像边缘检测方法研究[J].计算机工程与科学,2014(3):491-496.
[10]徐亮,魏锐.基于Canny算子的图像边缘检测优化算法[J].科技通报,2013(7):127-131.
[11]赖融,娄小平.基于自适应Canny和区域生长的滴头图像分割算法研究[J].电子技术,2013(2):7-8.
[12]苗加庆.基于自适应字典学习降噪改进的脑MRI图像分水岭精确分割算法研究[J].激光杂志,2015,36(1):35-39.