Lens shading correction method and image signal processing device and image sensor system employing the method
    2.
    发明授权
    Lens shading correction method and image signal processing device and image sensor system employing the method 有权
    镜头阴影校正方法和图像信号处理装置及采用该方法的图像传感器系统

    公开(公告)号:US09386243B2

    公开(公告)日:2016-07-05

    申请号:US14578608

    申请日:2014-12-22

    CPC classification number: H04N5/3572 H04N5/217 H04N9/045 H04N2209/047

    Abstract: A lens shading correction method includes providing lens shading correction profile data; calculating an intensity values of light passing through each of one or more visible light pass filters and each of one or more infrared light pass filters; calculating an average of the intensity values of the light passing through the one or more visible light pass filters; calculating an average of the intensity values of the light passing through the one or more infrared light pass filters; calculating a normalized intensity value of the light passing through the one or more infrared light pass filters, based on the calculated averages; adjusting one or more lens shading correction coefficients included in the lens shading correction profile data and each having a value varying depending on a frequency element of light, based on the calculated normalized intensity value; and correcting lens shading by using the adjusted lens shading correction coefficient.

    Abstract translation: 透镜阴影校正方法包括提供透镜阴影校正曲线数据; 计算通过一个或多个可见光通过滤光片和每个一个或多个红外光通滤光片中的每一个的光的强度值; 计算通过所述一个或多个可见光通过滤光器的光的强度值的平均值; 计算通过所述一个或多个红外光通过滤光器的光的强度值的平均值; 基于所计算的平均值计算通过所述一个或多个红外光通过滤光器的光的归一化强度值; 基于所计算的归一化强度值,调整包括在所述透镜阴影校正曲线数据中的每个具有根据光的频率元素而变化的值的一个或多个透镜阴影校正系数; 以及通过使用经调节的透镜遮蔽校正系数校正透镜阴影。

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