单相机视线跟踪系统研究

发布时间：2018-06-06 15:09

本文选题：视线跟踪 + 关注区域　；参考：《华中科技大学》2009年硕士论文

【摘要】： 视线跟踪技术就是通过实时地检测观测者眼睛的注视方向,得到其关注的兴趣点的一种方法。随着科学技术的逐渐发展,视线跟踪系统可以广泛应用于视觉注意机制的研究、广告分析、网页设计、残疾病人的辅助设备和心理分析,同时还可以作为一种新的计算机交互设备。目前大部分视线跟踪系统都无法满足实际的应用要求,主要有以下几个方面的原因:(1)跟踪精度低,无法满足实际需要;(2)很多视线跟踪系统都必须严格要求试验者保持头部位置固定,给使用者带来了很大的不便;(3)帧频低,无法满足实时的要求;(4)成本高,大部分自由头动式视线跟踪系统均使用了多个相机或采用了其他比较昂贵的辅助设备。为了解决以上的问题,本文设计了一种新的视线跟踪系统。该系统运用亚像素级图像处理技术,直接从暗瞳孔图像中提取出精确的瞳孔耀点中心坐标,在保证了跟踪精度的同时大大地提高了系统的帧频;通过文中提出的3D视线跟踪技术,本系统能在单相机条件下进行自由头动式的视线跟踪,不再要求试验者头部始终保持在固定的位置,给使用者带来了很大的方便。本文所做的工作成果有:(1)搭建了视线跟踪系统的整个硬件平台;(2)通过使用OpenCV计算机视觉库,完成了整个图像处理模块的软件编写,并能得到很高的分割精度;(3)实现了基于角膜反射-瞳孔中心技术的2D视线跟踪系统,并通过改进传统3D视线跟踪模型,开发了基于单相机的自由头动式视线跟踪系统软件。
[Abstract]:Line of sight tracking is a method to detect the gaze direction of the eye and get the interesting point of the observer's attention in real time. With the development of science and technology, the sight tracking system can be widely used in the study of visual attention mechanism, advertising analysis, web design, assistive devices for patients with disabilities and psychological analysis. At the same time, it can be used as a new computer interactive device. At present, most of the line of sight tracking systems are unable to meet the practical application requirements, mainly because of the following reasons: 1) low tracking accuracy. Many line of sight tracking systems must strictly require the experimenter to keep the head position fixed, which brings great inconvenience to the user. The frame frequency is low, and the real-time requirements can not be met. Most free-headed moving line of sight tracking systems use multiple cameras or other more expensive auxiliary devices. In order to solve the above problems, a new line of sight tracking system is designed in this paper. The system uses sub-pixel image processing technology to extract the accurate center coordinates of pupil outliers directly from the dark pupil image, which ensures the tracking accuracy and greatly improves the frame frequency of the system. Through the 3D line of sight tracking technology proposed in this paper, the system can track the free head moving line of sight under the condition of a single camera, and no longer requires the tester to keep the head in a fixed position all the time, which brings great convenience to the user. The results of this paper are as follows: 1) the whole hardware platform of the line of sight tracking system is built. By using the OpenCV computer vision library, the software of the whole image processing module is written. The 2D line of sight tracking system based on corneal reflex and pupil center technology is realized. By improving the traditional 3D line of sight tracking model, the software of free head moving line of sight tracking system based on single camera is developed.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2009
【分类号】：TP391.41

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