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Real-time Facial Features Tracking by Discrete Gabor Jets and Mean Shift

机译:采用离散Gabor喷气机跟踪的实时面部特征和平均转移

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This work presents a novel, real-time facial features tracking algorithm. In the extraction step angular and radial frequencies in circular regions around fiducial points are evaluated using approximation of the Gabor filter -^sDiscrete Gabor Jets. Within this approach only few simple operations followed by the Fast Fourier Transform are performed instead of highly time consuming Gabor filter calculations. Classification is performed using a modified Linear Discriminant Analysis adapted to the facial/non facial feature class problem. Mean shift algorithm is used to find local maxima for the set of the found features. Only edge points, evaluated using the Sobel operator and non-maximum gradient magnitude suppression, are considered as fiducial points. Accuracy of the algorithm is analysed with respect to the cut-off threshold of the gradient magnitude in the edge detector and distance threshold to the LDA model in classification procedure.
机译:这项工作提出了一种新颖的实时面部特征跟踪算法。在提取步骤中,使用Gabor滤波器的近似来评估围绕基准点的圆形区域中的角度和径向频率,从而近似于Gabor滤波器 - ^ Sdiscrete Gabor喷射。在该方法中,只有很少的简单操作,然后执行快速傅里叶变换,而不是高度耗时的Gabor滤波器计算。使用适用于面部/非面部特征类问题的修改的线性判别分析来执行分类。平均移位算法用于查找所发现功能集的本地最大值。仅使用Sobel操作员和非最大梯度抑制评估的边缘点被认为是基准点。在分类过程中相对于边缘检测器中的梯度幅度的截止阈值和分类过程中LDA模型的距离阈值的截止阈值分析算法的准确性。

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