赵彦涛,聂向荣,罗军,郑龙江,张旭光,李小俚.基于选择性阈值取反和径向对称的瞳孔中心定位[J].光电子激光,2016,27(11):1208~1213 |
基于选择性阈值取反和径向对称的瞳孔中心定位 |
Pupil center location based on radial symmetry combined with selective threshold |
投稿时间:2015-11-30 |
DOI: |
中文关键词: 高斯平滑 阈值取反 径向对称变换 投票 瞳孔中心 |
英文关键词:Gaussian smoothing threshold reversion radial symmetry vote pupil center |
基金项目:国家自然科学基金(61271409)、河北省自然科学基金项目(C2014203212)和河北省博士后科研项目择优(B2014003011)资助项目 (燕山大学 电气工程学院,河北 秦皇岛066004) |
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中文摘要: |
提出一种选择性阈值取反与径向对称变换 结合的算法,用于瞳孔中心的定位。提取人眼区域图像并转化为灰度图像,采 用高斯平滑减 小噪声的影响,对灰度图像进行阈值取反操作处理,去除眼睛周围像素的梯度变化对定 位的影响。选 择性阈值取反可综合利用直接取反和阈值取反的优点,进行径向对称变换投票得到瞳孔 中心,实现瞳 孔中心的定位。在BioID数据库及CASIA-IrisV4进行实验验证的结果表明,本文提出的选择 性阈值 取反操作后进行径向对称变换的瞳孔中心定位可取得更高的精度,满足实时性的要求,可 应用于人机交互的视线追踪系统。 |
英文摘要: |
The pupil center location plays an important role in the human-compu ter interaction gaze tracking system.An algorithm that combines radial symmetry with image selective threshold reversion is presented to locate the pupil center.Firstly,the eyes on a face image are extracted by the relative position of eyes and the center of the face area.The color eye image should be converted into a gray image,then the image is smoothed using the Gaussian smoothing to reduce the influence of noise.The gray scale image is reversed with a threshold,which can remove the influence of pixels′s gradient changes of the eye surroundings.After th image selective threshold reversion,we can use the radial symmetry to vote t he pupil center.In the experiments,we use the BioID and CASIA-IrisV4datasets t o test the approach,which demonstrates that the proposal can achieve higher accuracy in pupil center localization,the method meets the real-time requirement,so w e can apply it to the human-computer interaction gaze tracking system. |
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