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    • 4. 发明授权
    • Method and apparatus for minimizing ambient illumination effects in a vision system
    • 用于最小化视觉系统中的环境照明效果的方法和装置
    • US07295771B2
    • 2007-11-13
    • US11113521
    • 2005-04-25
    • Stephen H. FoxJeffrey M. Brown
    • Stephen H. FoxJeffrey M. Brown
    • G03B15/03H04N7/18H04N5/243
    • H04N5/235B60R21/01538G06K9/00791G06K9/2018H04N5/2354
    • Video components attributable to ambient lighting in a stream of digital images of a scene illuminated by both ambient and active sources are eliminated in each image frame, leaving only video components attributable to the active source. The spectrum of the active source is encompassed by the ambient source, and spectral filtering defines a primary channel comprising video components in a primary spectrum encompassing both active and ambient lighting and a secondary channel comprising video components in a secondary spectrum encompassing only ambient lighting. The pixels of the secondary channel are scaled by a factor correlating the spectral reflectances of the primary and secondary spectra, and the scaled secondary channel is subtracted from the primary channel to produce an ambient corrected image. The pixels of the ambient corrected image are further scaled to compensate for spectral filter bleeding of the active source into the secondary channel.
    • 在每个图像帧中消除了归因于由环境和有源源照明的场景的数字图像流中的环境照明的视频分量,仅留下归因于活动源的视频分量。 有源源的频谱由环境源包围,频谱滤波定义了主频道,其包括主频和环境光的主要频谱中的视频分量,以及包括仅包含环境照明的次频谱中的视频分量的辅频道。 通过将主要和次要光谱的光谱反射率相关联的因子对次要信道的像素进行缩放,并且从主要信道减去缩放的次要信道以产生环境校正图像。 进一步缩放环境校正图像的像素以补偿活性源进入次级通道的光谱滤波器渗出。
    • 6. 发明授权
    • Apparatus and method for monitoring transmission systems using embedded test signals
    • 使用嵌入式测试信号监测传输系统的装置和方法
    • US07298396B2
    • 2007-11-20
    • US10646846
    • 2003-08-25
    • Jeffrey M. BrownAndre J. Skalina
    • Jeffrey M. BrownAndre J. Skalina
    • H04N1/00H04N7/00H04N17/00H04N17/02H04N5/00H04N5/38H04B3/46H04B17/00H03C1/62
    • H04B3/46G01R31/11H04B17/0085H04N17/00
    • A monitoring system for an RF transmission system, such as a multi-channel television broadcasting antenna feed system, gathers data about the physical and electrical condition of the RF transmission system in real time. The system can detect and localize deterioration and other time-dependent faults in the transmission system by the tendency of faults to produce reflections back to the transmitter that were not part of the original characterization of the installation. Some kinds of faults, identified early enough, can be corrected without replacing components, and especially without shutting down the transmission system during prime viewing hours in the case of television broadcasters, or during a critical period of use of the system in the case of other user types. Other faults can be detected in time to order replacement parts before the underlying problem becomes severe, and to allow servicing during periods of low demand.
    • 用于诸如多声道电视广播天线馈送系统的RF传输系统的监视系统实时收集关于RF传输系统的物理和电气状况的数据。 该系统可以通过故障产生反射回发射机而不是安装的原始特性的一部分来检测和定位传输系统中的劣化和其他时间依赖的故障。 早期发现的某些故障可以在不更换部件的情况下进行更正,特别是在电视广播机构的主要观看时间内,或者在其他情况下系统使用的关键时期,尤其是不关闭传输系统 用户类型 在潜在问题变得严重之前,可以及时检测到其他故障,以便订购更换部件,并允许在低需求期间进行维修。