公开(公告)号：US20060022128A1

公开(公告)日：2006-02-02

申请号：US11007051

申请日：2004-12-08

申请人： Nitin Vaidya

发明人： Nitin Vaidya

IPC分类号： G12B13/00

CPC分类号： H01Q13/085 ,  G01J5/52 ,  G01S13/887

摘要： Scene-independent baseline signals in output value signals from radiometer or receiver channels used in millimeter wave imaging are eliminated or reduced and an improved image is composed. The scene-independent baseline signals are believed to result from a standing wave which is established between an antenna of the channel and a movable scanning element which scans radiant energy from the scene into each channel. The movable scanning element introduces changes in geometry which change the characteristics of the baseline signals depending upon the position of the movable scanning element. The baseline signals are measured by viewing a scene of uniform brightness temperature, and the baseline signal contribution is subtracted from the output value signals from each channel. The baseline compensated output signals are used to compose an image with better contrast.

摘要翻译： 毫米波成像中使用的辐射计或接收器通道的输出值信号中与场景无关的基线信号被消除或减少，并且构成改进的图像。 相信独立于场景的基线信号是由在通道的天线和扫描从每个通道的场景的辐射能的可移动扫描元件之间建立的驻波产生的。 可移动扫描元件引入几何形状的变化，其根据可移动扫描元件的位置改变基线信号的特性。 通过观察均匀亮度温度的场景来测量基线信号，并且从每个通道的输出值信号中减去基线信号贡献。 基线补偿输出信号用于组合具有较好对比度的图像。