共查询到20条相似文献,搜索用时 15 毫秒
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垂直视差的存在是影响立体视频观视舒适度的主要因素。为了在不影响水平视差的条件下实现对垂直视差的消减,本文引入Levenberg-Marquardt(L-M)非线性算法实现变换矩阵的精确求解。首先用抗缩放、旋转及仿射变换的SIFT(Scale-invariant feature transform)特征匹配算法检测出双目图像对的特征匹配点,然后根据匹配点的坐标位置运用L-M算法计算可消减垂直视差的变换矩阵,将变换矩阵作用于目标图像,计算出该视图每个像素点的新坐标位置。实验结果表明:与利用线性算法求解二维射影变换矩阵的垂直视差消减方法相比,本文提出的求解方法在垂直视差消减上比该算法提高了约0.029 1~0.323 2个像素,对水平视差的影响比该算法降低了约0.118 7~1.139 1个像素。因此本文提出的方法对垂直视差的消减起到了优化作用。 相似文献
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The resolution of the parallax image is inversely proportional to the view number in the horizontal direction for the traditional autostereoscopic display based on a parallax barrier. To balance the resolution in the vertical and horizontal directions, two parallax interleaved barriers are designed. The liquid crystal display panel provides the synthetic image with square pixel units, and the pixels in a unit are distributed to different horizontal views. Two parallax interleaved barriers work together to modulate pixels in vertical and horizontal directions. 3D display with uniform resolution and low crosstalk is demonstrated. 相似文献
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Horizontal parallax distortion in toed-in camera with wide-angle lens for mobile device 总被引:1,自引:0,他引:1
An effect of the toed-in camera configuration is keystone distortion, which causes vertical and horizontal parallax in the stereoscopic image. The horizontal parallax is the source of the depth plane curvature. However, if the stereoscopic image captured by the toed-in camera system with fish-eye lens is displayed on mobile device, it is uncomfortable to view because the horizontal parallax contains horizontal parallax distortion occurred by the wide field of view of the lenses. Therefore, in this paper, we propose a novel correction method of the horizontal parallax distortion, which is one of the keystone distortions, in a toed-in camera with fish-eye lenses for mobile device. We have experimented to attest the proposed method. In experiment, we used two charge coupled device cameras, whose field of view is 48.48°. In addition, the captured stereoscopic image was corrected for the barrel distortion and the horizontal parallax distortion. Therefore, the proposed method provides correcting of the horizontal parallax distortion from a toed-in camera system in order that the users can enjoy three-dimensional effects without the visual fatigue. Additionally, the proposed method is able to apply to toed-in camera consisting of any kinds of cameras. 相似文献
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One-dimensional integral imaging (1DII) which only has horizontal disparity is a practical solution of high resolution in the vertical direction, low-cost, easy-viewable three-dimensional (3D) display. A 1DII based on a parallax barrier is proposed in this paper. The 1DII consists of a parallax barrier and a display panel. The operation principle and parameter calculation of the 1DII are described in detail. Two prototypes of the proposed 1DII and conventional 1DII based on a lenticular lens array are developed. The proposed 1DII improves the quality of the 3D image and provides larger viewing angle than that based on a lenticular lens array, and it is simpler and has lower cost than that based on a lenticular lens array. 相似文献
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The parallax barrier 3D display is an autostereoscopic display with low cost. However, the conventional parallax barrier 3D display has a disadvantage of low brightness. Therefore, a parallax barrier 3D display based on shared pixels is proposed. The shared pixels have adapted pixel values which limit crosstalk in a low level, so that they can be displayed simultaneously in both two parallax images. These pixels increase aperture ratio of the parallax barrier. Therefore, they can bring high brightness. A prototype of the proposed 3D display is developed and it has higher brightness than those based on the conventional one. 相似文献
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A full resolution autostereoscopic three-dimensional (3D) display prototype is developed. It is composed of a time division thin film transistor liquid crystal display panel with an optical controlled birefringence liquid crystal polarization switch and a polarizer parallax barrier. Fast driving circuits operating at 120-Hz frame rate are fabricated. The 3D images on the display have the same resolution as the corresponding two-dimensional images, which is significantly different from conventional parallax barrier autostereoscopic 3D displays having degraded 3D image resolution. 相似文献
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Masahiro Yamaguchi Toshio Honda Nagaaki Ohyama Jun Ishikawa 《Optics Communications》1994,110(5-6):523-528
A new method for rainbow and multicolor holographic stereograms is described using the technique of multidot recording, which was originally developed for the syntheses of full-parallax holographic stereograms. Instead of recording vertical parallax, an image of horizontal slit is synthesized for rainbow holography. It becomes possible to obtain large images by a compact optical system, since the hologram is composed of many small elementary holograms. Multicolor image is also produced by the same system introducing a simple image processing. Experimental results of three-dimensional and color imagery are demonstrated. 相似文献
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Effect of thickness of parallax barrier on viewing angle of one-dimensional integral imaging display
A parameter design of a parallax barrier is one of the most important keys to design a one-dimensional integral imaging (1DII) display using parallax barrier. The relationship between the thickness of the parallax barrier and the viewing angle of the 1DII display is studied, and the maximal value of the thickness is also obtained. When the thickness of the parallax barrier is greater than the maximal value, the viewing angle of the 1DII display is decreased with increasing the thickness of the parallax barrier. A prototype of the 1DII display using parallax barrier is developed, and the experimental results agree well with the theory. 相似文献
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设计了一种反射式多路投影立体显示系统,并介绍了该系统的成像原理及特性。系统将12幅视差图同时投影在柱面栅上,观察者仅凭肉眼就可看到具有双眼视差和运动视差的立体图像。系统成像视域较大,可以同时供多人观看。 相似文献
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自动测量头盔显示器的视差时,用CCD相机取代人眼的主观读取,由于机器视觉不如人眼灵活,CCD相机在人眼观察点才能确保移动时采集的图像是完整的,从而保证全视场的视差测量。该文提出采用模式搜索法在头盔显示器光学平面内实现CCD相机自动对准人眼观察点(眼位点),从而实现头盔显示器全视场视差的自动测量。对该自动测量系统的测量原理,以及CCD相机自动对准眼位点的实现过程进行了详细论述与说明,对测量精度与效率,对准精度与重复定位精度进行了实验分析。实验结果表明,该方法能够快速、准确、自动地对准眼位点,定位精度为±0.071°,与摆头法测量视差系统进行对比实验,全视场视差测量效率高,重复精度高。 相似文献
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Image-plane holograms, made using the two-stage process of Rotz and Friesem, provide achromatic or near-achromatic images only when the image straddles the plane of the second hologram. It is shown that in certain circumstances it is possible to generate nearly-achromatic images which appear to lie completely behind the second hologram plane. 相似文献
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A three-dimensional shape measurement system with only one camera and a rotating periscope is proposed. Many images are captured at every few degrees of periscope rotation. The distance along the optical axis of the camera from the focal point of the camera system to a certain point along the object surface is inversely proportional to the parallax. In this system, a circular streak is obtained by tracing a point on each image using the cross-correlation along the direction of periscope shift. The parallax can be calculated from the radius of the streak. Applying this method to shape measurement of the human face from synthetic images, the images were well reconstructed and the proposed system may be adaptable to a portable 3D shape acquisition system. 相似文献
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介绍了三维显示技术的研究现状,综述了狭缝光栅和柱面透镜光栅在自由立体显示技术中的重要应用。回顾了各种光栅式自由立体显示系统的结构和原理;提出了如何根据狭缝光栅和柱面透镜光栅的特殊光学性质,在传统的立体显示系统中添加各种光栅形成灵活组合结构来提高立体显示效果,强调了它们在减小串扰、增大视场角、避免摩尔条纹以及提供更全面的三维信息等方面的作用。最后指出基于两种光栅的叠加构成面积大、参数均匀、价格低廉的新型透镜可实现全视差立体显示,对探索自由立体显示技术的研究很有意义。 相似文献