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    • 61. 发明授权
    • History-based spatio-temporal noise reduction
    • 基于历史的时空噪声降低
    • US08447130B2
    • 2013-05-21
    • US11967754
    • 2007-12-31
    • Yi-Jen Chiu
    • Yi-Jen Chiu
    • G06K9/62H04N5/00
    • H04N5/21G06T5/002G06T2207/10016G06T2207/20012G06T2207/20182G06T2207/20192H04N5/144H04N19/117H04N19/86
    • Implementations of a history-based temporal motion noise filtering technique that considers the temporal smooth among multiple pictures as well as the block-based technique to estimate the noise/motion history to better reflect the spatial/temporal smoothness in the local neighborhood are provided. In particular, implementations of the per-pixel blending technique in the block-based noise measurement may be used to better manipulate pixels in both the spatial and temporal domains. A global noise detection technique may be used to estimate the occurrence and/or strength of the noise. A content adaptive spatial filtering content adaptive spatial filter based on a local edge measurement may be used to reduce picture noise as well as preserve edge sharpness. Implementations may be configured for various applications. In particular, programmability options allow users to specify the filter parameters for singularity detection, spatial-only, temporal-only and spatial-temporal filters to achieve user desirable viewing experience.
    • 提供了基于历史的时间运动噪声滤波技术的实现,其考虑多个图像之间的时间平滑以及基于块的技术来估计噪声/运动历史以更好地反映局部邻域中的空间/时间平滑度。 特别地,基于块的噪声测量中的每像素混合技术的实现可以用于更好地操纵空间和时域的像素。 可以使用全局噪声检测技术来估计噪声的发生和/或强度。 可以使用基于局部边缘测量的内容自适应空间滤波内容自适应空间滤波器来降低图像噪声以及保持边缘清晰度。 实现可以被配置用于各种应用。 特别地,可编程选项允许用户指定用于奇异性检测的过滤器参数,仅空间,仅时间和空间 - 时间过滤器,以实现用户期望的观看体验。