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    Method of and apparatus for detecting a face-like region and observer tracking display
    1.
    发明授权
    Method of and apparatus for detecting a face-like region and observer tracking display 失效
    用于检测面部区域和观察者跟踪显示的方法和装置

    公开(公告)号：US06504942B1

    公开(公告)日：2003-01-07

    申请号：US09229187

    申请日：1999-01-13

    Applicant: Qi He Hong ,  Nicolas Steven Holliman ,  David Ezra

    Inventor： Qi He Hong ,  Nicolas Steven Holliman ,  David Ezra

    IPC: G06K936

    CPC classification number: G06K9/00228

    Abstract: A method of detecting a face-like region of a colour image, comprises reducing the resolution of the colour image by averaging the saturation to form a reduced resolution image and searching for a region of the reduced resolution image. The searched region has, in a predetermined shape, a substantially uniform saturation which is substantially different from the saturation of the portion of the reduced resolution image surrounding the predetermined shape.

    Abstract translation: 一种检测彩色图像的面部区域的方法包括通过平均饱和度来降低彩色图像的分辨率，以形成降低分辨率的图像并搜索降低分辨率图像的区域。 搜索区域具有与预定形状周围的缩小分辨率图像的部分的饱和度基本上不同的基本上均匀的饱和度的预定形状。

    Method of and apparatus for detecting a human face and observer tracking display
    2.
    发明授权
    Method of and apparatus for detecting a human face and observer tracking display 失效
    用于检测人脸和观察者跟踪显示的方法和装置

    公开(公告)号：US06633655B1

    公开(公告)日：2003-10-14

    申请号：US09386527

    申请日：1999-08-30

    Applicant: Qi He Hong ,  Nicolas Steven Holliman ,  David Ezra

    Inventor： Qi He Hong ,  Nicolas Steven Holliman ,  David Ezra

    IPC: G06K900

    CPC classification number: G06T7/74 ,  G02B27/225 ,  G06K9/00248 ,  G06K9/00255 ,  G06K9/00281 ,  G06K9/00604 ,  G06K9/00912 ,  G06T2207/30201 ,  H04N13/286 ,  H04N13/302 ,  H04N13/366 ,  H04N13/398

    Abstract: A method is provided for detecting a human face in an image, such as a sequence of images supplied by a video camera. The method comprises locating in each image a candidate face region and analyzing the candidate face region for a first characteristic indicative of a facial feature. The locating step may comprise detecting uniformity saturated regions of predetermined shape in a reduced resolution version of the image. The analyzing step may comprise selecting a signal color component, forming a vertical integral projection profile and detecting an omega shape in the profile characteristic of an eye region of a face.

    Abstract translation: 提供了一种用于检测图像中的人脸的方法，例如由摄像机提供的图像序列。 该方法包括在每个图像中定位候选面部区域并且分析候选面部区域以获得指示面部特征的第一特征。 定位步骤可以包括在图像的降低分辨率版本中检测预定形状的均匀饱和区域。 分析步骤可以包括选择信号颜色分量，形成垂直整体投影轮廓并且在面部的眼睛区域的轮廓特征中检测ω形状。

    Diffractive, polarization modulating optical devices
    6.
    发明申请
    Diffractive, polarization modulating optical devices 有权
    衍射，偏振光调制光学器件

    公开(公告)号：US20070053028A1

    公开(公告)日：2007-03-08

    申请号：US10586361

    申请日：2005-01-19

    Applicant: David Ezra

    Inventor： David Ezra

    IPC: G03H1/00

    CPC classification number: G03H1/0272 ,  G02B5/1861 ,  G02B5/3016 ,  G03H1/0011 ,  G03H1/0244 ,  G03H1/0256 ,  G03H2001/0016 ,  G03H2001/184 ,  G03H2001/188 ,  G03H2001/2276 ,  G03H2240/54 ,  G03H2240/55 ,  G03H2250/38 ,  G03H2270/52 ,  G07D7/0032

    Abstract: An optical device includes an encoding surface having a micro-relief pattern (22) over at least part thereof designed to produce a predetermined diffracted first image when illuminated in use, and an optically anisotropic layer (26) such as a polymerized liquid crystal provided whereby at least part of the micro-relief pattern (22) induces local orientation of the optically anisotropic layer (26) thereby to impose a predetermined polarization modulation, thereby to produce a predetermined polarization dependent second image when illuminated in use.

    Abstract translation: 一种光学装置包括编码表面，其具有至少部分上的微浮雕图案（22），其被设计成在使用时照射时产生预定的衍射第一图像，以及提供诸如聚合液晶的光学各向异性层（26），由此 微浮雕图案（22）的至少一部分引起光学各向异性层（26）的局部取向，从而施加预定的偏振调制，由此在使用时照亮时产生预定的偏振相关的第二图像。

    Directional display and method of making a mask for a directional display
    8.
    发明授权
    Directional display and method of making a mask for a directional display 失效
    定向显示和制作面向方向显示的方法

    公开(公告)号：US06473141B2

    公开(公告)日：2002-10-29

    申请号：US09874684

    申请日：2001-06-05

    Applicant: Richard Robert Moseley ,  Graham John Woodgate ,  David Ezra

    Inventor： Richard Robert Moseley ,  Graham John Woodgate ,  David Ezra

    IPC: G02F11335

    CPC classification number: G02F1/133512 ,  G02B5/32 ,  G02B27/2214 ,  G02F1/133524 ,  G02F1/133526 ,  G02F1/1336 ,  G02F1/133606 ,  G02F2001/133607 ,  G03H2001/0439 ,  G03H2210/22 ,  G03H2270/54 ,  H04N13/305 ,  H04N13/31 ,  H04N13/312 ,  H04N13/32 ,  H04N13/351 ,  H04N13/359 ,  H04N13/376

    Abstract: A directional display comprises a display arrangement such as a spatial light modulator and a rear parallax barrier illuminated by a suitable backlight. The spatial light modulator and the parallax barrier cooperate to produce Fresnel diffraction which results in spatially non-uniform brightness across viewing windows of the display. Also, where the spatial light modulator has pixels of non-constant vertical aperture, further variations in the intensity profile at the windows occurs. In order to compensate for this, a mask is provided, for instance between the parallax barrier and the backlight. The mask cooperates with the parallax barrier to produce an intensity pattern having variations which are the inverse of the variations in intensity pattern produced by the parallax barrier and the spatial light modulator. The variations are superimposed and substantially cancel each other out so as to result in viewing windows which have substantially uniform light intensities.

    Abstract translation: 定向显示器包括诸如空间光调制器和由合适的背光照明的后视差屏障的显示装置。 空间光调制器和视差屏障合作产生菲涅耳衍射，其导致在显示器的观察窗口上的空间不均匀的亮度。 此外，在空间光调制器具有不恒定垂直孔径的像素的情况下，窗口处的强度分布的进一步变化。 为了补偿这一点，提供掩模，例如在视差屏障和背光之间。 掩模与视差屏障配合以产生具有与由视差屏障和空间光调制器产生的强度图案的变化相反的变化的强度图案。 这些变化被叠加并且基本相互抵消，从而导致具有基本上均匀的光强度的观察窗。

    Three-dimensional projection display apparatus
    9.
    发明授权
    Three-dimensional projection display apparatus 失效
    三维投影显示装置

    公开(公告)号：US5703717A

    公开(公告)日：1997-12-30

    申请号：US337932

    申请日：1994-11-10

    Applicant: David Ezra ,  Graham John Woodgate ,  Jonathan Harrold ,  Basil Arthur Omar

    Inventor： David Ezra ,  Graham John Woodgate ,  Jonathan Harrold ,  Basil Arthur Omar

    IPC: G03B35/18 ,  G02B27/22 ,  H04N13/00 ,  H04N13/04

    CPC classification number: H04N13/0409 ,  G02B27/2214 ,  H04N13/0404 ,  H04N13/0418 ,  H04N13/0443 ,  H04N13/0459

    Abstract: A 3D projection display comprises an autostereoscopic image producing unit which directs light beams corresponding to respective 2D views in different directions towards a projection lens. The projection lens co-operates with the image producing unit to image the light beams at respective different regions in the aperture of the projection lens. A light-transmissive screen co-operates with the image producing unit and the projection lens to image the views at the screen. The screen may comprise a Fresnel lens, or where a magnified image of increased angular spread is required, a double lenticular screen angular amplifier.

    Abstract translation: 3D投影显示器包括自动立体图像产生单元，其将对应于相应2D视图的光束朝向投影透镜指向不同方向。 投影透镜与图像产生单元协作，以在投影透镜的孔径中的各个不同区域成像光束。 透光屏与图像产生单元和投影透镜合作，以在屏幕上对视图进行成像。 屏幕可以包括菲涅耳透镜，或者需要增大的角度扩展的放大图像，双透镜屏幕角放大器。

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