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尽管3D图形卡为我们勾勒的是一个立体的世界,由于我们的显示终端设备还仅仅能表现出平面的物体,所以不得不借助我们的想象力和经验的帮助才能领会3D场景中的物体景深关系。不过3D立体眼镜独辟蹊径,在普通的显示器上就能表现出逼真的3D效果。实际上所谓立体感只是人的一种感受,由于双眼各自视角不同,观察到的景物特征自然也有差异,经过大脑的合成就产生了“立体感”或者说“距离感”。立体眼镜需要与3D图形卡配合,3D图形卡分别为左眼和右眼建立图像,存储在显示内存中,当显卡刷新屏幕时,在相邻的两次刷新中分别呈现这两个不同视角的图像,而立体眼镜上的液晶片则受显示同步信号驱动,在屏幕显示对应于左眼的图像时让左眼正常可视,并控制右眼的液晶片切换到不透光状态,反之亦然。由于视觉具有延迟性,我们感觉上就好象看到了连续的立体化的影像——换句话说就是“蒙骗”了我们的大脑将显示器上的平面图像误以为立体影像——所谓“虚拟现实”。
Although the 3D graphics card shows us a three-dimensional world, because our display devices can only display planar objects, we have to rely on our imagination and experience to understand the depth of field in 3D scenes . However, 3D stereo glasses unique, ordinary display can show realistic 3D effects. In fact the so-called three-dimensional sense is just a feeling of people, because their eyes different perspectives, the observed nature of the scenery there are naturally different, through the synthesis of the brain to produce a “three-dimensional” or “sense of distance.” 3D glasses need to cooperate with the 3D graphics card, 3D graphics card for the left eye and right eye, respectively, to establish an image stored in the display memory, when the graphics refresh the screen in the adjacent two refreshes were presented in two different perspectives And the liquid crystal on the stereoscopic glasses is driven by the display synchronization signal to make the left eye normally visible when the screen displays the image corresponding to the left eye and control the liquid crystal on the right eye to switch to the opaque state and vice versa . Because of the delay in vision, we feel as though we saw a continuous three-dimensional image - in other words, “deceived” our brain to mistakenly view a planar image on the display as a stereoscopic image - the so-called “virtual reality” .