Chapter 14 Virtual reality 14.1 An Introduction to and history of Virtual reality The first attempt at virtual reality used head-mounted displays (HMDS). In HMDs, projectors feed real-time images to small screens attached inside a kind of helmet that the user wears. In the beginning, HMDs often showed mono pictures, and the user's head movement were tracked. In modern HMDs, stereo pictures are standard, since the technique has become cheaper. Typically, hMDs either have poor resolutionor are too heavy. Because only one person at a time can use an hmd. discussion ofimages is much more difficult 虚拟现实首次尝试使用了头盔式显示器(HMD)。在HMD中,投 影机把实时图景投影到附着于用户所带头盔内的小屏幕上。最初, HMD显示平面图片,追踪用户的头部运动。但在现代HMD中,由 于这项技术变得更加便宜,立体图片则成为了标准。通常说来 HMD或者分辨率过低或者过于笨重。由于一个HMD一次只能由一 个人使用,因此对图景的讨论就更加困难。 《什第机专出美语 14-6
Chapter 14 Virtual Reality 计算机专业英语 14-6 The first attempt at virtual reality used head-mounted displays (HMDs). In HMDs, projectors feed real-time images to small screens attached inside a kind of helmet that the user wears. In the beginning, HMDs often showed mono pictures, and the user’s head movements were tracked. In modern HMDs, stereo pictures are standard, since the technique has become cheaper. Typically, HMDs either have poor resolution or are too heavy. Because only one person at a time can use an HMD, discussion of images is much more difficult. 虚拟现实首次尝试使用了头盔式显示器（HMD）。在HMD中，投 影机把实时图景投影到附着于用户所带头盔内的小屏幕上。最初， HMD显示平面图片，追踪用户的头部运动。但在现代HMD中，由 于这项技术变得更加便宜，立体图片则成为了标准。通常说来， HMD或者分辨率过低或者过于笨重。由于一个HMD一次只能由一 个人使用，因此对图景的讨论就更加困难。 14.1 An Introduction to and History of Virtual Reality
Chapter 14 Virtual reality 14.1 An Introduction to and history of Virtual reality To increaseimage quality, Fakespacel4l invented the bOom (Binocular Omni-Orientation Monitor). Very small monitors are mounted on a mechanical arm. and users look into the monitors like they would lookinto a pair of binoculars. Tracking occurs when the user moves the arm, which changes the perspective. When a user releases the BoOM, another person can look at the same thing from the same perspective, which is an advantage over HMDs. Since real monitors are used. the resolution is good 为了提高图景的质量, Fakespace发明了BoOM(双目全方位监视 器)。机械臂上固定着非常小的监视器,就象使用双目望远镜一样 用户使用监视器观察。用户移动机械臂时改变了视角,因此实现了追 踪。当一个用户不用这个BOOM后,另一个用户可以从相同的视角 观察到相同的事物,这一点BOOM要优于HMD。因为使用了真正的 监视器,所以分辨率很好。 《什第机专出美语 14-7
Chapter 14 Virtual Reality 计算机专业英语 14-7 To increase image quality, Fakespace[4] invented the BOOM (Binocular Omni-Orientation Monitor).Very small monitors are mounted on a mechanical arm, and users look into the monitors like they would look into a pair of binoculars. Tracking occurs when the user moves the arm, which changes the perspective. When a user releases the BOOM, another person can look at the same thing from the same perspective, which is an advantage over HMDs. Since real monitors are used, the resolution is good. 为了提高图景的质量，Fakespace发明了BOOM（双目全方位监视 器）。机械臂上固定着非常小的监视器，就象使用双目望远镜一样， 用户使用监视器观察。用户移动机械臂时改变了视角，因此实现了追 踪。当一个用户不用这个BOOM后，另一个用户可以从相同的视角 观察到相同的事物，这一点BOOM要优于HMD。因为使用了真正的 监视器，所以分辨率很好。 14.1 An Introduction to and History of Virtual Reality
Chapter 14 Virtual reality 14.1 An Introduction to and history of Virtual reality The concept of a room with graphics projected from behind the walls was invented at EvL in 1992. The images on the walls are usually in stereo to give a depth cue. The main advantage over ordinary graphics systems is that the users are surrounded by the projected images. which means that the images are the users'main field of vision. This is usually called a "CAVE, CAVE Automatic Virtual Environment The first Cave(as well as the concept) was created by the faculty, staff, and students at EVi 具有墙后投影生成图像的房间的概念是1992年在EVL发明的。墙上 的图景通常是立体的以便能表现出深度。与普通的图形系统相比,它 的主要优势在于用户被投影图像所包围,这意味着这些图景是用户的 主要视野。它通常被称为CAvE,即洞穴式自动虚拟环境。第一台 CAVE(与其概念)是由EVL的全体教职员和同学共同创造的 《什第机专出美语 14-8
Chapter 14 Virtual Reality 计算机专业英语 14-8 The concept of a room with graphics projected from behind the walls was invented at EVL in 1992. The images on the walls are usually in stereo to give a depth cue. The main advantage over ordinary graphics systems is that the users are surrounded by the projected images, which means that the images are the users’main field of vision. This is usually called a “CAVE”,CAVE Automatic Virtual Environment. The first CAVE(as well as the concept) was created by the faculty, staff, and students at EVL. 具有墙后投影生成图像的房间的概念是1992年在EVL发明的。墙上 的图景通常是立体的以便能表现出深度。与普通的图形系统相比，它 的主要优势在于用户被投影图像所包围，这意味着这些图景是用户的 主要视野。它通常被称为CAVE，即洞穴式自动虚拟环境。第一台 CAVE（与其概念）是由EVL的全体教职员和同学共同创造的 14.1 An Introduction to and History of Virtual Reality