共查询到19条相似文献,搜索用时 140 毫秒
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眼镜式3D显示设备综合性能测试方案的研究 总被引:1,自引:1,他引:0
为了更系统、科学地评价眼镜式立体设备的显示质量,本文对目前主流的眼镜式3D显示器进行串扰率、亮度、对比度、色温、色域的测量。首先,根据眼镜式立体设备的成像原理设计相关的测试方案。测试结果表明,色分式3D显示器左眼串扰为3%,右眼为9%,偏振式3D显示器水平方向串扰最低为1.79%,垂直方向串扰呈振荡分布,时分式3D显示器的串扰最低,达0.37%;眼镜式3D显示器的亮度在3D模式下均发生较大程度的下降,其中时分式3D显示器在3D模式下亮度仅为6.97cd/m2,其对比度也随之发生大幅下降;色域方面,时分式显示器在3D模式下色域覆盖率为72.7%,相比2D模式存在明显下降,而色分式3D显示器在3D模式下的色域覆盖率最小,仅为0.3%。上述数据可为设备的选择和产品性能的优化提供有益参考作用。 相似文献
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立体显示技术从观看者是否佩戴设备进行观看可以分为头戴式和裸眼式两种类型。其中头戴式又可以分为偏振眼镜、互补色眼镜、快门眼镜、头盔等技术;裸眼式可以分为光栅式、全息式、集成成像和体显示。分类介绍头戴式和裸眼式立体显示技术的原理、结构、各自的优缺点以及最新研究进展,分析了当前立体显示技术的现状,展望了立体显示的未来。 相似文献
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近年来在三维立体显示技术中,我们正经历着从眼镜式三维显示到自由式三维图像显示的跨越。本文通过分析人的立体视觉,阐述了基于双目视差原理实现左右眼视频图像分离的光栅式自由立体显示技术的具体工作原理及分析。 相似文献
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为了优化固态体积式真三维的立体成像效果,显示出更加逼真的立体图像,对编码图像的灰度级和成像显示体的对比度进行了研究。论文从固态体积式真三维立体显示器成像原理出发,介绍了固态体积式真三维的电路系统、光学投影系统和成像显示体,在分析和研究影响立体显示效果的主要因素后提出了两种改进的方法。一种方法是通过降低图像刷新频率,提高编码图像数据位数,从而提高像素灰度等级,另一种方法是改变液晶光阀的盒厚,以此增强显示体的对比度。在真三维样机上,成功实现了32级灰度,将颜色种类从4 096种提升至32 768种,对比度相比原样机提高了1.2倍,主观感受到更加丰富的图像细节和色彩。优化效果明显,可以显示出细节更加清晰、颜色更加丰富和效果更加真实的三维立体图像。 相似文献
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1前言现在的立体电视,以佩戴眼镜的立体显示为主流。但从观众的便利性考虑,还是对无眼镜的立体显示寄予希望。无眼镜的立体显示,作为小画面的两眼式立体显示器,在市场上业已实用化。但要单纯地把它大画面化还是很难的。能将其实现的就是多眼式立体显示。但是,不论是有眼镜的,还是无眼镜的两眼式 相似文献
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IEC立体显示终端测量方法综述 总被引:1,自引:0,他引:1
介绍了IEC起草的佩戴眼镜式的立体显示终端测量方法草案。立体显示测量包括亮度、对比度、色域及两眼间串扰等。两眼间串扰是当前研究最为关心的参数,该草案提出了灰阶串扰测量方法。最后总结了我国制定立体显示测量行业标准的进展情况。 相似文献
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基于单片DMD的裸眼立体显示的实现方法研究 总被引:1,自引:0,他引:1
目前基于平板显示的立体显示设备有很多,比如等离子显示(PDP)和液晶显示(LCD).这些显示设备在超过 50 英寸时,价格都非常昂贵.本文提出了一种新的基于单片 DMD 的裸眼立体显示的实现方法.在分析DLP的显示原理和利用水平视差产生立体图像的机理以及系统构件(高压汞灯、色轮、数字微镜、透镜组、屏幕等)的传输特性的基础上,使用一种算法,在 FPGA 中把输入的视频图像分解为带有视差的图像序列,分别送到 DMD;同时产生视差同步信号,驱动执行部件.这样,在 DLP 显示屏前一定的区域内可以裸眼观察到立体图像.其特点是:单片 DMD 大屏幕显示;裸眼显示(不需佩戴特殊眼镜),立体景深可调;不损失器件的物理分辨率. 相似文献
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《Journal of Visual Communication and Image Representation》2014,25(4):622-631
Viewing stereoscopic 3D content is typically enabled either by using polarizing or active shutter glasses. In certain cases, some viewers may not wear viewing glasses and hence, it would be desirable to tune the stereoscopic 3D content so that it could be simultaneously watched with and without viewing glasses. In this paper we propose a video post-processing technique which enables good quality 3D and 2D perception of the same content. This is done through manipulation of one view by making it more similar to the other view to reduce the ghosting artifact perceived without viewing glasses while 3D perception is maintained. The proposed technique includes three steps: disparity selection, contrast adjustment, and low-pass filtering. The proposed approach was evaluated through an extensive series of subjective tests, which also revealed good adjustment parameters to suit viewing with and without viewing glasses with an acceptable 3D and 2D quality, respectively. 相似文献
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Homogeneous plasticity in metallic glasses is generally only observed at high temperatures or in very small structures (less than ≈100 nm), so their applications for structural performance have been very limited. Here, nanolaminates with alternating layers of Cu50Zr50 metallic glass and nanocrystalline Cu are synthesized and it is found that samples with an optimal composition of 112‐nm‐thick metallic‐glass layers and 16‐nm‐thick Cu layers demonstrate a maximum strength of 2.513 GPa, a value 33% greater than that predicted by the rule‐of‐mixtures and 25% better than that of pure Cu50Zr50 metallic glass. Furthermore, ≈4% strain at fracture is achieved, suppressing the instantaneous catastrophic failure often associated with metallic glasses. It is postulated that this favorable combination of high strength and deformability is caused by the size‐dependent deformation‐mode transition in metallic glasses, from highly localized plasticity, leading to immediate failure in larger samples to homogeneous extension in the smaller ones. 相似文献
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Multiview video plus depth sequence is considered as an efficient 3D video format for supporting advanced stereoscopic and auto-stereoscopic multiview displays. In order to encode this video format, several modes are commonly employed with rate distortion optimization technique. Specifically, direct mode is an efficient mode to encode homogeneous or stationary regions without encoding any additional motion information. However, in the format, the conventional direct mode causes inaccuracy of motion parameters, i.e., a motion vector and a reference index. Thus, we propose a new method for deriving motion parameters of direct mode, which settles the inaccuracy problem, based on depth information and priority of neighboring blocks determined by their relative position. The proposed direct mode achieves an improvement in coding performance when compared with two state-of-the-art direct modes for multiview video coding. The experimental results show that the proposed method yields average bitrate savings of 4.6%, up to 13.7% in terms of the Bjontegaard Delta metric. 相似文献
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掺镱硼酸盐和磷酸盐激光玻璃的研究 总被引:10,自引:1,他引:10
制备了掺Yb∶硼酸盐和Yb∶磷酸盐玻璃 ,并研究了它们的玻璃物理性质和光谱性质。掺Yb∶磷酸盐玻璃的热机械性质优于掺Yb∶硼酸盐玻璃。掺Yb∶硼酸盐玻璃的受激发射截面和荧光寿命分别为 0 5 3× 10 -2 0 cm2 和 0 85ms。掺Yb∶磷酸盐玻璃的受激发射截面和荧光寿命分别为 0 4 5× 10 -2 0 cm2 和 1 8ms。作为激光材料 ,掺Yb∶磷酸盐玻璃的综合性能优于掺Yb∶硼酸盐玻璃。用钛宝石激光器抽运Yb∶硼酸盐玻璃实现 8mW准连续激光输出。用波长为 976nm ,6W的LD抽运Yb∶磷酸盐玻璃获得了 6 2mW的连续激光输出 ,其斜率效率为 4 4 %。 相似文献
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Chen J.Y.C. Haas E.C. Barnes M.J. 《IEEE transactions on systems, man and cybernetics. Part C, Applications and reviews》2007,37(6):1231-1245
In the future, it will become more common for humans to team up with robotic systems to perform tasks that humans cannot realistically accomplish alone. Even for autonomous and semiautonomous systems, teleoperation will be an important default mode. However, teleoperation can be a challenging task because the operator is remotely located. As a result, the operator's situation awareness of the remote environment can be compromised and the mission effectiveness can suffer. This paper presents a detailed examination of more than 150 papers covering human performance issues and suggested mitigation solutions. The paper summarizes the performance decrements caused by video images bandwidth, time lags, frame rates, lack of proprioception, frame of reference, two-dimensional views, attention switches, and motion effects. Suggested solutions and their limitations include stereoscopic displays, synthetic overlay, multimodal interfaces, and various predicative and decision support systems. 相似文献