公开(公告)号：EP1475957A1

公开(公告)日：2004-11-10

申请号：EP03252872.1

申请日：2003-05-08

Applicant: STMicroelectronics Limited

Inventor： Findlater, Keith ,  Bosco, Angelo

IPC: H04N5/217 ,  H04N3/15

CPC classification number: H04N5/3658 ,  H04N5/365

Abstract: An image sensor array 12 of active pixel elements 17 arranged in rows and columns, where each column has an output circuit 18 for reading out pixel image signals comprising a pair of sample capacitors 34, 36, a switching means 38, 40 operable in conjunction with pixel switches 24, 26, 28 to apply pixel voltages to the sample capacitors 34, 36, and one or more optically masked pixels 19 such that output image signals obtained from said optically masked pixels 19 represent substantially only the column FPN includes image processing means 14 for recording the column FPN for each column from said optically masked pixels 19; recording the image signal from said sensor array of active pixels 17; and subtracting the column FPN column-wise from the image signal.

Abstract translation: 布置成行和列的有源像素元件17的图像传感器阵列12，其中每列具有用于读出像素图像信号的输出电路18，该输出电路18包括一对采样电容器34,36，开关装置38,40以及 像素开关24,26,28以将像素电压施加到采样电容器34,36和一个或多个光学屏蔽像素19，使得从所述光学屏蔽像素19获得的输出图像信号基本上仅表示列FPN包括图像处理装置14 用于从所述光学掩蔽像素19记录每列的列FPN; 从有源像素17的传感器阵列记录图像信号; 并从图像信号中逐列减去列FPN。