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公开(公告)号:US08811766B2
公开(公告)日:2014-08-19
申请号:US13332949
申请日:2011-12-21
申请人: Anna Raffalli , Haiyun Wang , Lucas Hui , Patricia Wei Yin Chiang
发明人: Anna Raffalli , Haiyun Wang , Lucas Hui , Patricia Wei Yin Chiang
CPC分类号: H04N19/00066 , H04N19/117 , H04N19/14 , H04N19/86
摘要: Systems and methods are disclosed for determining the perceptibility of noise in a block of images and/or video. The systems and methods may compute a mask value for the block using a block masking generator. The mask value may indicate the perceptibility of noise in the block. The mask value may be computed using a normalized activity value and/or a texture value for the block. The normalized activity value may indicate the relative activity in the block as compared to the activity in the image and/or video. The texture value may indicate the strength and/or number of edges in the block.
摘要翻译: 公开了用于确定图像和/或视频块中的噪声的感知性的系统和方法。 系统和方法可以使用块掩码生成器来计算块的掩码值。 掩模值可以指示块中的噪声的可感知性。 可以使用归一化活动值和/或块的纹理值来计算掩模值。 与图像和/或视频中的活动相比,归一化活动值可以指示块中的相对活动。 纹理值可以指示块中的边缘的强度和/或数量。
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公开(公告)号:US20120133836A1
公开(公告)日:2012-05-31
申请号:US12955188
申请日:2010-11-29
申请人: Anna Raffalli , Haiyun Wang , Lucas Hui
发明人: Anna Raffalli , Haiyun Wang , Lucas Hui
IPC分类号: H04N5/21
CPC分类号: H04N5/21 , H04N19/117 , H04N19/14 , H04N19/172 , H04N19/86
摘要: A frame level noise estimate for an image can be determined. An image processor includes a high pass filter unit configured to perform high-pass spatial filtering of image data for first and second frames to produce high-pass spatially filtered information for the first frame and the second frame. A cumulative histogram generator is configured to analyze the high-pass spatially filtered information for the first frame and the second frame to produce a first cumulative histogram for the first frame and a second cumulative histogram for the second frame. A comparator is configured to determine a difference value between the first and second cumulative histograms. A mapping unit is configured to determine an estimated noise value based on the difference value.
摘要翻译: 可以确定图像的帧级噪声估计。 图像处理器包括高通滤波器单元,其被配置为对第一和第二帧执行图像数据的高通空间滤波,以产生用于第一帧和第二帧的高通空间滤波信息。 累积直方图生成器被配置为分析第一帧和第二帧的高通空间滤波信息,以产生第一帧的第一累积直方图和第二帧的第二累积直方图。 比较器被配置为确定第一和第二累积直方图之间的差值。 映射单元被配置为基于该差值来确定估计的噪声值。
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公开(公告)号:US20120170864A1
公开(公告)日:2012-07-05
申请号:US13332949
申请日:2011-12-21
申请人: Anna Raffalli , Haiyun Wang , Lucas Hui , Patricia Chiang
发明人: Anna Raffalli , Haiyun Wang , Lucas Hui , Patricia Chiang
IPC分类号: G06K9/40
CPC分类号: H04N19/00066 , H04N19/117 , H04N19/14 , H04N19/86
摘要: Systems and methods are disclosed for determining the perceptibility of noise in a block of images and/or video. The systems and methods may compute a mask value for the block using a block masking generator. The mask value may indicate the perceptibility of noise in the block. The mask value may be computed using a normalized activity value and/or a texture value for the block. The normalized activity value may indicate the relative activity in the block as compared to the activity in the image and/or video. The texture value may indicate the strength and/or number of edges in the block.
摘要翻译: 公开了用于确定图像和/或视频块中的噪声的感知性的系统和方法。 系统和方法可以使用块掩码生成器来计算块的掩码值。 掩模值可以指示块中的噪声的可感知性。 可以使用归一化活动值和/或块的纹理值来计算掩模值。 与图像和/或视频中的活动相比,归一化活动值可以指示块中的相对活动。 纹理值可以指示块中的边缘的强度和/或数量。
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