CAJ | 학술논문

基于光学相干层析离体牙图像的去噪算法研究
기우광학상간층석리체아도상적거조산법연구
Study on denoising algorithm for optical coherence tomography tooth images in vitro

万方数据

国际生物医学工程杂志國際生物醫學工程雜誌 국제생물의학공정잡지
INTERNATIONAL JOURNAL OF BIOMEDICAL ENGINEERING
2010年 3期 129-133,后插3 ,共6页

连小丽%姚晖%王冠华%梁雨%张林朴%万木森%李燕妮%孟卓%靳淑凤%石博雅%代晓华%姚晓天%刘铁根

련소려%요휘%왕관화%량우%장림박%만목삼%리연니%맹탁%근숙봉%석박아%대효화%요효천%류철근

光学相干层析成像%离体牙%图像去噪%平均曲率流滤波%非线性扩散拉普拉斯金字塔算法%非局部均值滤波光學相榦層析成像%離體牙%圖像去譟%平均麯率流濾波%非線性擴散拉普拉斯金字塔算法%非跼部均值濾波
광학상간층석성상%리체아%도상거조%평균곡솔류려파%비선성확산랍보랍사금자탑산법%비국부균치려파
Optical coherence tomography%Extracted teeth%Image denoising%Nonlinear coherent diffusion%Laplacian pyramid-based nonlinear diffusion algorithm%Non-local means filter

目的光学相干层析成像因其高分辨率、无损等优点,适于早期龋检测;但由于系统中存在的噪声,影响其成像质量.为了重建牙齿的原貌信息,需寻找一种适于早期龋检测的光学相干层析成像实时图像去噪算法.方法比较平均曲率流滤波、非线性扩散拉普拉斯金字塔算法、非局部均值滤波3种滤波方法对光学相干层析人离体牙图像的去噪效果.从噪声抑制、边界保持、运算时间3方面分析上述3种算法的实时去噪性能及其优缺点.结果非局部均值滤波在噪声抑制和边界保持2个方面能达到很好的平衡,但实时性差;而非线性扩散拉普拉斯金字塔算法则能在滤波效果和运算效率达到较好的平衡;平均曲率流滤波次之.结论非线性扩散拉普拉斯金字塔算法较适于早期龋检测的光学相干层析成像实时图像去噪.
목적 광학상간층석성상인기고분변솔、무손등우점,괄우조기우검측;단유우계통중존재적조성,영향기성상질량.위료중건아치적원모신식,수심조일충괄우조기우검측적광학상간층석성상실시도상거조산법.방법 비교평균곡솔류려파、비선성확산랍보랍사금자탑산법、비국부균치려파3충려파방법대광학상간층석인리체아도상적거조효과.종조성억제、변계보지、운산시간3방면분석상술3충산법적실시거조성능급기우결점.결과 비국부균치려파재조성억제화변계보지2개방면능체도흔호적평형,단실시성차;이비선성확산랍보랍사금자탑산법칙능재려파효과화운산효솔체도교호적평형;평균곡솔류려파차지.결론 비선성확산랍보랍사금자탑산법교괄우조기우검측적광학상간층석성상실시도상거조.
Objective Optical coherence tomography(OCT) is used to detect early dental caries for its high resolution and noninvasiveness. However, the imaging quality is limited due to the system noise. Therefore, in order to acquire raw dental images, it is necessary to find a real time denoising algorithm of OCT image for early caries detection. Methods A comparison of effects of three denoising algorithms, nonlinear coherent diffusion (NCD) filtering, Laplacian pyramid-based nonlinear diffusion (LPND) filtering and non-local means (NLmeans) filtering, for OCT tooth images was performed. Specifically, the performance of the above approaches was evaluated and compared in speckle suppression, edge preservation and time cost. Results NLmeans well balanced edges preservation and speckle suppression in spite of its high time-consuming. Meanwhile, LPND filtering provided a good compromise between image quality improvement and time cost, with the NCD filtering performed with less satisfaction. Conclusion LPND is proved to have a better potential in speckle reduction of real-time OCT tooth images for early dental caries detection.