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    • 7. 发明授权
    • Chromakeying system
    • Chromakeying系统
    • US06271890B1
    • 2001-08-07
    • US09420216
    • 1999-10-18
    • Michael TamirAvi Sharir
    • Michael TamirAvi Sharir
    • H04N718
    • H04N5/2224H04N9/75
    • A chromokeying panel for use in conjunction with a chromakeying system includes a plurality of first and second location. Each of the first and the second locations has a color within the color of a color keying spectrum of the chromakeying system. In addition, each of the first and the second locations are arranged to define a coded pattern for a computation of a perspective of the chromakeying panel with respect to a camera independently in each video field produced by the camera. The coded pattern may include a plurality of straight lines that intersect to define vertices. The plurality of straight lines may be spaced apart from each other so that for a given vertex, a ratio of the distance of one of the lines extending from the given vertex to a first adjacent vertex, to the distance of another of the lines from the given vertex to a second adjacent vertex is unique.
    • 用于与染色键系统结合使用的色键板包括多个第一和第二位置。 第一和第二位置中的每一个都具有彩色键盘系统的颜色键控频谱的颜色。 此外,第一和第二位置中的每一个被布置成在相机产生的每个视频场中独立地定义用于相对于相机独立地计算着色键盘的透视图的编码图案。 编码图案可以包括与定义顶点相交的多条直线。 多个直线可以彼此间隔开,使得对于给定的顶点,从给定顶点延伸到一个第一相邻顶点的一条线的距离与另一条直线距离 给定顶点到第二个相邻顶点是唯一的。
    • 8. 发明授权
    • Chromakeying system
    • Chromakeying系统
    • US6122013A
    • 2000-09-19
    • US732336
    • 1996-12-30
    • Michael TamirAvi Sharir
    • Michael TamirAvi Sharir
    • H04N5/262H04N9/75
    • H04N5/2224H04N9/75
    • A chromokeying system includes a store that contains a representation of a known coded chromokeying pattern. The system further includes a frame grabber that grabs a video image including at least a portion of the known coded chromokeying pattern and a foreground subject. A perspective transformation computation unit computes a perspective transformation by comparing the video image of the portion of the coded chromokeying pattern with the known chromokeying pattern. The system may further include a background generation unit that receives a background image and applies the perspective transformation to the background image to produce a transformed background. The portion of the coded chromokeying pattern in the video image can then be replaced by the transformed background to create a composite image.
    • PCT No.PCT / US95 / 05324 Sec。 371日期1996年12月30日第 102(e)日期1996年12月30日PCT 1995年4月25日PCT PCT。 WO95 / 30312 PCT出版物 日期:1995年11月9日染色体系统包括一个存储器,其中包含一个已知的编码色谱图案的表示。 该系统还包括抓取包括已知编码色调模式的至少一部分和前景对象的视频图像的帧抓取器。 透视变换计算单元通过将经编码的色调模式的部分的视频图像与已知的色键图案进行比较来计算透视变换。 该系统还可以包括背景生成单元,其接收背景图像并将透视变换应用于背景图像以产生变换后的背景。 然后视频图像中的编码色调图案的部分可以被变换后的背景代替以创建合成图像。