公开(公告)号：EP1949132B1

公开(公告)日：2020-03-25

申请号：EP06808462.3

申请日：2006-11-08

申请人： QinetiQ Limited

发明人： SALMON, Neil Anthony ,  HAYWARD, Stephen David ,  KAUSHAL, Tej Paul ,  MILLINGTON, David Alan

IPC分类号： G01S13/89 ,  G01V8/00

公开(公告)号：EP1476852B1

公开(公告)日：2008-02-27

申请号：EP03737350.3

申请日：2003-01-31

申请人： QinetiQ Limited

发明人： KAUSHAL, Tej Paul ,  MANNING, Paul Antony

IPC分类号： G06T7/20 ,  G08B13/19

CPC分类号： G08B13/1961 ,  G06T7/254 ,  G08B29/046

摘要： A sensor having a detector array (4) is provided with means for determining whether the normal field of view of the sensor has been obscured. The image output from the detector array (4) is compared by a processor (8) to an image of the normal field of view, previously acquired and stored in a memory (6). Where there are significant differences between the images the processor (8) activates an alarm (10). The location of high spatial frequency detail in the image may be compared and the absence of such detail used to give an indication that the sensor may be masked.

公开(公告)号：EP1476852A2

公开(公告)日：2004-11-17

申请号：EP03737350.3

申请日：2003-01-31

申请人： Qinetiq Limited

发明人： KAUSHAL, Tej Paul ,  MANNING, Paul Antony

IPC分类号： G06T7/20 ,  G08B13/19

CPC分类号： G08B13/1961 ,  G06T7/254 ,  G08B29/046

摘要： A sensor having a detector array (4) is provided with means for determining whether the normal field of view of the sensor has been obscured. The image output from the detector array (4) is compared by a processor (8) to an image of the normal field of view, previously acquired and stored in a memory (6). Where there are significant differences between the images the processor (8) activates an alarm (10). The location of high spatial frequency detail in the image may be compared and the absence of such detail used to give an indication that the sensor may be masked.

摘要翻译： 具有检测器阵列的传感器设置有用于确定传感器的正常视野是否已被遮蔽的装置。 从检测器阵列输出的图像由处理器与先前获取并存储在存储器中的正常视场图像进行比较。 在图像之间存在显着差异的情况下，处理器激活报警。 可以比较图像中的高空间频率细节的位置，并且不存在用于给出传感器可能被掩蔽的指示的这种细节。