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Detection of the mandibular canal in orthopantomography using a Gabor-filtered anisotropic generalized Hough transform

机译:使用Gabor滤波的各向异性广义Hough变换对正畸X线检查下颌管

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摘要

In this paper, we explore the possibility of applying the anisotropic generalized Hough transform (AGHT) enhanced with a Gabor based time-frequency filtering (GTF) for the determination of the mandibular canal in digital dental panoramic radiographs. The proposed method is based on template matching using the fact that the shape of the mandibular canal is usually the same, followed by a filtering of the accumulator space in the Gabor domain for a precise detection of the position. The proposed procedure consists of a detailed description of the shape of the canal in its canonical form and on preserving Gabor filtering information for sorting the hierarchy of location candidates after applying anisotropically the extraction algorithm. The experimental results show that the proposed procedure is robust to recognition under occlusion and under the presence of additional structures e.g. teeth, projection errors.
机译:在本文中,我们探索了应用基于Gabor的时频滤波(GTF)增强的各向异性广义霍夫变换(AGHT)来确定数字牙科全景X光片中下颌管的可能性。所提出的方法基于模板匹配,使用的模板通常是下颌管的形状相同,然后在Gabor域中对累加器空间进行过滤以精确检测位置。拟议的程序包括对运河形状的规范形式的详细描述,以及在各向异性地应用提取算法后,保留Gabor过滤信息以对候选位置进行分层的方法。实验结果表明,所提出的程序对于在遮挡下和在存在附加结构(例如,结构)的情况下的识别是鲁棒的。牙齿,投影错误。

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