CAJ | 학술논문

数字图像技术的最新发展将促进立体显示的实现,它使得在数字领域对立体图像进行高效处理和编码成为可能.立体图像显示已经应用于教育、医疗和娱乐等领域.反过来这些图像应用领域又促进了立体显示技术的发展.不管采用何种方式处理立体显示数据,因显示系统的终端为观察者,它必须以某种方式将正确的图像展现到观察者与其对应的眼前.一种简单经济的方法就是时分转换法.对应于左眼和右眼的图像在一个刷新周期内交替出现.观察者戴着光阀眼镜,当左眼图像显示时,左眼光阀被打开使图像通过,此时右眼光阀处于关闭状态阻止图像通过.当右眼图像显示时,光阀操作过程正好相反.这样,在立体显示中左眼只见到左眼图像,右眼只见到右眼图像.当观察者的眼睛位置随着其头部运动而发生变化时,应回馈其变化以调整左眼和右眼的图像使观察不受影响.此文介绍一种应用超声波传感器构成的简单的、低成本的显示头跟踪器.置于眼镜上的超声波发射器发送信号,其显示屏上3个超声波接收器(呈三角形放置)接收信号.根据从发射信号到接收信号的时间间隔可以计算出头部位置.介绍了硬件结构、实验数据分析及校正算法.最后讨论了虚拟现实应用未来研究方向,即改善眼睛舒适度的自由观看系统.
수자도상기술적최신발전장촉진입체현시적실현,타사득재수자영역대입체도상진행고효처리화편마성위가능.입체도상현시이경응용우교육、의료화오악등영역.반과래저사도상응용영역우촉진료입체현시기술적발전.불관채용하충방식처리입체현시수거,인현시계통적종단위관찰자,타필수이모충방식장정학적도상전현도관찰자여기대응적안전.일충간단경제적방법취시시분전환법.대응우좌안화우안적도상재일개쇄신주기내교체출현.관찰자대착광벌안경,당좌안도상현시시,좌안광벌피타개사도상통과,차시우안광벌처우관폐상태조지도상통과.당우안도상현시시,광벌조작과정정호상반.저양,재입체현시중좌안지견도좌안도상,우안지견도우안도상.당관찰자적안정위치수착기두부운동이발생변화시,응회궤기변화이조정좌안화우안적도상사관찰불수영향.차문개소일충응용초성파전감기구성적간단적、저성본적현시두근종기.치우안경상적초성파발사기발송신호,기현시병상3개초성파접수기(정삼각형방치)접수신호.근거종발사신호도접수신호적시간간격가이계산출두부위치.개소료경건결구、실험수거분석급교정산법.최후토론료허의현실응용미래연구방향,즉개선안정서괄도적자유관간계통.
The development of digital imaging system will facilitate the practical implementation of the long-known concept of binocular imaging. Efficient processing and coding of binocular imagery are possible in the digital domain. Binocular imagery has applications in education, medicine and entertainment, to name a few. And the proliferation of stereoscopic display is currently gaining impetus from the activities. Regardless of applications or processing method, any stereoscopic display system whose end-user is a person must have some method of presenting the correct image to only the eye intended for it. A simple and economical method is known as time-division multiplexing. The left and right-eye images(stereoscopic image pair) are alternately displayed once a vertical refresh period. The viewer wears an optical shutter. While left-eye image is displayed, the shutter in front of the left eye is "open" and allows light to pass through it. During the time the right eye shutter is "closed" and light transmission is retarded. The shutters then reverse the operation when the right-eye image is displayed. In this way the left eye sees the left-eye images and the right eye sees the right-eye images of the stereoscopic image pair. When the eye position changes with the viewer's head movement, the position of the left and right image on the screen should be changed according to the head movement. In this paper a simple and low-cost head tracker using acoustic sensors is demonstrated . An acoustic transmitter which sends pulse signals is attached to the eye-glasses and three acoustic receivers which receive the pulse signals are attached to three triangle points of the display screen. According to the time duration of transmitter and receivers the head position can be calculated. Hardware configuration, experimental data analysis and calibrating algorithm are described in detail.