Eye movement on stereoscipic space : development of the apparatus and experiments.

1)头盔眼动测量装置的研制：为解决虚拟现实环境中的疲劳问题，研制了双眼运动测量装置。这个装置安装在头戴式显示器上。当观察到实际空间环境、虚拟现实环境和复合现实环境时，可以使用该设备测量双眼的运动。在该装置中，视点的测量是基于视频图像中的瞳孔中心位置。提出了两种测量瞳孔中心位置的算法。Haslwanter(1995)的方法被用于从瞳孔中心位置计算眼睛位置。并提出了一种新的标定方法来提高空间精度。2)实验：测量并比较了实际空间观测和立体图像观测的眼动情况。无论是实际的空间观察还是立体图像观察，结果表明，在某些情况下，非优势眼并不指向物体。物体被移动到水平线的右边和左边，两次观测之间几乎没有什么区别。然而，它被移到了前面和后面，存在着较大的差异。立体图像观察未发现收敛-发散运动。这一结果可以解释为观察者在立体图像观察中没有使用足够的深度线索，从而导致了对虚拟现实的疲劳。

1) The development of the head mounted eye movement measurement device : The device that both eyes' movements could be measured was developed to make the fatigue problem on the virtual reality environment clear. This device was attatched on the head mounted display. Both eyes' movements can be measured with this device when an actual space environment, a virtual reality environment, and a compound reality environment are being observed. In this device the measurement of fixation point was based on the center location of the pupil by the video image. Two kinds of algorithm were developed about the central location of measuring it of the pupil. The method of Haslwanter (1995) was used for the way of calculating an eye position from the pupil center position. And we developed a new calibration method to improve space accuracy.2) Experiments : The eye movements on the actual space observation and the stereoscopic image observation were measured and compared. Regardless of the actual space observation and the stereoscopic image observation, the results showed that non-dominant eye did not point to the object in some cases. The object was moved to the right and left of the horizontal, there were few differences between both observations. However, it was moved to the front and back, there were a larger differences. The convergence - divergence movement did not found in the stereoscopic image observation. This result can be interpreted that observer did not use ample depth cues on the stereoscopic image observation and this causes the fatigue on the virtual reality.