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视线追踪系统中特征参数提取方法研究

DOI: 10.11834/jig.20100918

Keywords: 视线追踪,特征参数提取,瞳孔定位,视线估计,瞳孔-角膜反射(PCCR)技术

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Abstract:

为了提取人眼的高精度亚像素特征参数,利用亮瞳现象,提出了一种基于多通道图像的高精度亚像素特征参数提取方法。该方法首先通过差分图像滤波获得瞳孔区域,进而检测瞳孔区域的边缘,并在眼睛区域附近基于灰度,搜索角膜反射区域;然后求取其质心用于定位角膜反射区域中心,并对瞳孔边缘做滤波,以消除角膜反射对瞳孔边缘轮廓的影响,进而利用椭圆拟合来定位瞳孔中心;最后提取包括人眼特征和人脸位置的多个参数,另外,还建立了一个多特征参数提取的流程,为下一步的视线估计提供了参数依据。实验结果及视线追踪系统最终的视线估计结果证明,该方法是有效的。

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