公开(公告)号：US4922345A

公开(公告)日：1990-05-01

申请号：US148611

申请日：1988-01-26

申请人： Nicholas Barton ,  Robert Billing ,  Hugh K. Littlejohn

发明人： Nicholas Barton ,  Robert Billing ,  Hugh K. Littlejohn

IPC分类号： H04N5/275

CPC分类号： H04N5/275

摘要： A control signal synchronized to a digital video signal to be processed and defining the position of a rectilinear line (51,52,53,54) relatively to the image frame (50) is generated by providing an initial value corresponding to the perpendicular distance of the origin (0) of the scanning point of the video raster from the line (51,52,53,54) and incrementing or decrementing this value during movement of the scanning point in accordance with the rates of change of this distance in the horizontal and vertical directions. By logically combining the signals corresponding to a plurality of lines (52,52,53,54) a further signal is obtained which is "true" when the scanning point is within a geometric figure defined by the lines. This signal can provide a "key" signal controlling the display within the figure of image information to be combined with the video signal. Signals relating to four lines (52,52,53,54) forming a quadrilateral can provide coordinate signals for interrogation of a frame store containing image information to be transposed into the area defined by the quadrilateral figure.

摘要翻译： 与要处理的数字视频信号同步的控制信号和相对于图像帧（50）定义直线（51,52,53,54）的位置是通过提供对应于垂直距离 来自线（51,52,53,54）的视频光栅的扫描点的原点（0），并且在扫描点移动期间根据该距离在水平方向上的变化率递增或递减该值 和垂直方向。 通过逻辑地组合对应于多条线（52,52,53,54）的信号，当扫描点在由线限定的几何图形内时，获得另一个“真”信号。 该信号可以提供控制要与视频信号组合的图像信息的图形内的显示的“键”信号。 与形成四边形的四条线（52,52,53,54）相关的信号可以提供用于询问包含要转置到由四边形图形定义的区域中的图像信息的帧存储器的坐标信号。

公开(公告)号：US4595955A

公开(公告)日：1986-06-17

申请号：US530983

申请日：1983-09-09

申请人： Philip R. Groves ,  Hugh K. Littlejohn

发明人： Philip R. Groves ,  Hugh K. Littlejohn

IPC分类号： H04N5/228 ,  H04N5/235

CPC分类号： H04N5/2283

摘要： Electro-optical tube alignment apparatus having a monitor for monitoring shading of the tube image, an adjustment device for adjusting tube target bias voltage so that shading is introduced into the image and is monitored by the monitor, and a control for varying tube alignment until a minimum average shading is monitored. Also beam current setting apparatus in which switch devices are provided to switch off the beam current during field scans so that the target charge during setting exceeds that produced by an operational peak light level. Methods associated with the apparatus are also provided.

摘要翻译： 具有用于监视管图像的阴影的监视器的电光管取向装置，用于调节管目标偏压的调节装置，使得阴影被引入到图像中并由监视器监视，以及用于改变管对准的控制，直到 监控最小平均阴影。 还有电流设定装置，其中提供开关装置以在场扫描期间切断射束电流，使得设定期间的目标电荷超过由操作峰值光电平产生的目标电量。 还提供了与该装置相关联的方法。