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    • 3. 发明申请
    • Virtual ring camera
    • 虚拟环相机
    • US20070263076A1
    • 2007-11-15
    • US11408876
    • 2006-04-21
    • Carlton AndrewsRoy Stedman
    • Carlton AndrewsRoy Stedman
    • H04N7/14
    • H04N7/15H04N7/148
    • A system and method for a virtual omni-directional camera array, comprising a video control system (VCS) coupled to two or more co-located portable or stationary information processing systems, each enabled with a video camera and microphone, to provide a composite video view to remote videoconference participants. Audio streams are captured and selectively mixed to produce a virtual array microphone as a clue to selectively switch or combine the video streams from individual cameras. The VCS selects and controls predetermined subsets of video and audio streams from the co-located video camera and microphone-enabled computers to create a composite video view, which is then conveyed to one or more similarly-enabled remote computers over a broadband network (e.g., the Internet). Manual overrides allow participants or a videoconference operator to select predetermined video streams as the primary video view of the videoconference.
    • 一种用于虚拟全向照相机阵列的系统和方法,包括耦合到两个或更多个同位置的便携式或固定式信息处理系统的视频控制系统(VCS),每个可移动或固定信息处理系统都能够使用摄像机和麦克风,以提供复合视频 查看远程视频会议参与者。 音频流被捕获并选择性地混合以产生虚拟阵列麦克风,作为选择性地切换或组合来自各个摄像机的视频流的线索。 VCS从共同定位的摄像机和启用麦克风的计算机中选择和控制视频和音频流的预定子集,以创建复合视频视图,然后通过宽带网络将其传送到一个或多个类似启用的远程计算机(例如, , 互联网)。 手动覆盖允许参与者或视频会议运营商选择预定的视频流作为视频会议的主要视频视图。
    • 7. 发明授权
    • Single-pass color quantization for graphic images
    • 用于图形图像的单程彩色量化
    • US06195081B1
    • 2001-02-27
    • US09008167
    • 1998-01-16
    • Roy Stedman
    • Roy Stedman
    • G09G504
    • H04N1/6058
    • A system and method for performing a single-pass color quantization for graphic images on a computer. The computer includes a processor capable of running operating code, an input device accessible by the processor for providing a source image, and an output device for displaying a target image. Both the source image and target image include a plurality of pixels, each having red-green-blue components. However, there are fewer available colors for the target image than for the source image. A program instructs the processor to reduce the source image to the target image by reading a pixel from the target image and comparing the color of the pixel to mappings stored in a table. If the pixel color does not correspond to a mapping in the table, then the program instructs the processor to convert the pixel color into hue-whiteness-blackness (HWB) components, map the HWB components to a color of the target image, and store the mapping in the table. If the pixel color does correspond to a mapping in the table, then the program instructs the processor to simply retrieve the mapping.
    • 一种用于对计算机上的图形图像执行单遍颜色量化的系统和方法。 计算机包括能够运行操作码的处理器,由处理器可访问的用于提供源图像的输入设备,以及用于显示目标图像的输出设备。 源图像和目标图像都包括多个像素,每个具有红 - 绿 - 蓝分量。 然而,目标图像的可用颜色比源图像少。 程序指示处理器通过从目标图像读取像素并将像素的颜色与存储在表中的映射进行比较来将源图像减少到目标图像。 如果像素颜色不对应于表中的映射,则程序指示处理器将像素颜色转换为色调 - 黑度(HWB)分量,将HWB分量映射到目标图像的颜色,并存储 表中的映射。 如果像素颜色确实对应于表中的映射,则程序指示处理器简单地检索映射。