Method and apparatus for canceling fixed pattern noise in CMOS image sensor
    1.
    发明授权
    Method and apparatus for canceling fixed pattern noise in CMOS image sensor 失效
    CMOS图像传感器中消除固定图案噪声的方法和装置

    公开(公告)号:US07978237B2

    公开(公告)日:2011-07-12

    申请号:US12073625

    申请日:2008-03-07

    IPC分类号: H04N5/217

    摘要: An apparatus for canceling a fixed pattern noise in a CMOS image sensor includes a storage device, a fixed pattern noise operation circuit, and a fixed pattern noise canceling circuit. The storage device stores first reference fixed pattern noises operated in a vertical blank section of an (n−1)th frame. The fixed pattern noise operation circuit calculates second reference fixed pattern noises based on the first reference fixed pattern noises stored in the storage device and blank fixed pattern noises output in a vertical blank section of an n-th frame and outputs the second reference fixed pattern noises to the storage device to update the first reference fixed pattern noises to the second reference fixed pattern noises. The fixed pattern noise canceling circuit cancels active fixed pattern noises in combination signals based on the combination signals output in an active section of an (n+1)th frame and including the active fixed pattern noises and pixel signals and the second reference fixed pattern noises output from the storage device.

    摘要翻译: 一种用于消除CMOS图像传感器中的固定图案噪声的装置,包括存储装置,固定图案噪声运算电路和固定图案噪声消除电路。 存储装置存储在第(n-1)帧的垂直空白部分中操作的第一参考固定模式噪声。 固定模式噪声运算电路基于存储在存储装置中的第一参考固定模式噪声和在第n帧的垂直空白部分中输出的空白固定模式噪声来计算第二参考固定模式噪声,并输出第二参考固定模式噪声 到存储装置,以将第一参考固定模式噪声更新为第二参考固定模式噪声。 固定图案噪声消除电路基于在第(n + 1)帧的有效部分中输出的组合信号消除组合信号中的有源固定模式噪声,并且包括有源固定模式噪声和像素信号以及第二参考固定模式噪声 从存储设备输出。

    Method and apparatus for canceling fixed pattern noise in CMOS image sensor
    2.
    发明申请
    Method and apparatus for canceling fixed pattern noise in CMOS image sensor 失效
    CMOS图像传感器中消除固定图案噪声的方法和装置

    公开(公告)号:US20090046177A1

    公开(公告)日:2009-02-19

    申请号:US12073625

    申请日:2008-03-07

    IPC分类号: H04N5/217 H04N5/335

    摘要: An apparatus for canceling a fixed pattern noise in a CMOS image sensor includes a storage device, a fixed pattern noise operation circuit, and a fixed pattern noise canceling circuit. The storage device stores first reference fixed pattern noises operated in a vertical blank section of an (n−1)th frame. The fixed pattern noise operation circuit calculates second reference fixed pattern noises based on the first reference fixed pattern noises stored in the storage device and blank fixed pattern noises output in a vertical blank section of an n-th frame and outputs the second reference fixed pattern noises to the storage device to update the first reference fixed pattern noises to the second reference fixed pattern noises. The fixed pattern noise canceling circuit cancels active fixed pattern noises in combination signals based on the combination signals output in an active section of an (n+1)th frame and including the active fixed pattern noises and pixel signals and the second reference fixed pattern noises output from the storage device.

    摘要翻译: 一种用于消除CMOS图像传感器中的固定图案噪声的装置,包括存储装置,固定图案噪声运算电路和固定图案噪声消除电路。 存储装置存储在第(n-1)帧的垂直空白部分中操作的第一参考固定模式噪声。 固定模式噪声运算电路基于存储在存储装置中的第一参考固定模式噪声和在第n帧的垂直空白部分中输出的空白固定模式噪声来计算第二参考固定模式噪声,并输出第二参考固定模式噪声 到存储装置,以将第一参考固定模式噪声更新为第二参考固定模式噪声。 固定图案噪声消除电路基于在第(n + 1)帧的有效部分中输出的组合信号消除组合信号中的有源固定模式噪声,并且包括有源固定模式噪声和像素信号以及第二参考固定模式噪声 从存储设备输出。