An effective tooth isolation method for bitewing dental X-ray images

P. Huang, P. Lin, C. Kuo, Y. S. Cho
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引用次数: 8

Abstract

Tooth isolation is a very important pre-processing step for both computer-aided dental diagnosis and automatic dental identification systems. The accuracy of tooth isolation will directly affect the accuracy of feature extraction and thereby the final results of both types of systems. This paper presents a very effective and fully automatic tooth isolation method for bitewing dental X-ray images. Our upper-lower jaw separation mechanism is based on gray-scale integral projection to avoid possible information loss and incorporates with angle adjustment to handle skewed images. In single tooth isolation, we propose an adaptive windowing scheme for locating gap valleys to improve the accuracy. Furthermore, excessive isolation-curves can be removed and separating lines can be added to indicate the locations of missing teeth. Experimental results show that our method achieves higher tooth isolation accuracy rates for both upper- and lower-jaw images, when compared to Nomir and Abdel-Mottaleb's method.
一种有效的牙齿隔离方法对咬翼牙x线图像
牙齿分离是计算机辅助牙科诊断和牙齿自动识别系统的重要预处理步骤。齿隔离的精度将直接影响特征提取的精度,从而影响两类系统的最终结果。本文介绍了一种非常有效的、全自动的牙齿隔离方法。我们的上下颌分离机制基于灰度积分投影,以避免可能的信息丢失,并结合角度调整来处理倾斜图像。在单齿隔离中,我们提出了一种自适应窗方案来定位间隙谷,以提高精度。此外,可以去除过多的隔离曲线,并添加分隔线来指示缺牙的位置。实验结果表明,与Nomir和Abdel-Mottaleb的方法相比,我们的方法在上颌和下颌图像上都取得了更高的牙齿隔离准确率。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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