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1. 发明授权

US08416323B2 Noise reduction method and noise reduction apparatus 有权
标题翻译：降噪方法和降噪装置
公开(公告)号：US08416323B2
公开(公告)日：2013-04-09
申请号：US12552078
申请日：2009-09-01
申请人： Wei-Kuo Lee , Yun-Hung Shen , Ji-Wei Wan
发明人： Wei-Kuo Lee , Yun-Hung Shen , Ji-Wei Wan
IPC分类号： H04N5/217
CPC分类号： G06T5/002 , G06T5/20 , G06T2207/10024 , H04N1/409
摘要： The present invention provides a noise reduction method and apparatus for use in reducing noise of a digital image. The noise reduction apparatus comprises a threshold value generating unit, a determining unit, and an adjusting unit. The threshold value generating unit generates a noise threshold value according to a target window and a first chrominance value and a second chrominance value of an input pixel of the image. The determining unit determines whether the input pixel needs to be adjusted according to the noise threshold value and pixel values of neighboring pixels of the input pixel. The adjusting unit adjusts the pixel value of the input pixel when the input pixel is determined as needing to be adjusted. Using the noise reduction apparatus of the present invention, not only noise of a digital image can be identified, but also the degradation caused by the noise can be reduced and thus the overall picture quality can be improved.
摘要翻译：本发明提供一种用于降低数字图像噪声的降噪方法和装置。噪声降低装置包括阈值生成单元，确定单元和调整单元。阈值生成单元根据目标窗口和图像的输入像素的第一色度值和第二色度值生成噪声阈值。确定单元确定输入像素是否需要根据噪声阈值和输入像素的相邻像素的像素值进行调整。当输入像素被确定为需要调整时，调节单元调整输入像素的像素值。使用本发明的降噪装置，不仅可以识别数字图像的噪声，还可以降低由噪声引起的劣化，从而可以提高整体图像质量。

2. 发明申请

US20060262206A1 Noise reduction method 审中-公开
标题翻译：降噪方法
公开(公告)号：US20060262206A1
公开(公告)日：2006-11-23
申请号：US11433446
申请日：2006-05-15
申请人： Wei-Kuo Lee , Yun-Hung Shen , Ji-Wei Wan
发明人： Wei-Kuo Lee , Yun-Hung Shen , Ji-Wei Wan
IPC分类号： H04N5/217
CPC分类号： G06T5/002 , G06T5/20 , G06T2207/10024 , H04N1/409
摘要： The present invention provides a noise reduction method for use in reducing noise of a digital image, the method comprising steps of: defining a target window on a coordinate plane defined by the first chrominance and the second chrominance as the horizontal axis and the vertical axis; determining a noise threshold value according to whether an input pixel having a first chrominance value and a second chrominance value is located inside the window; determining whether the input pixel is a noise point according to the noise threshold value and luminance values of neighboring pixels of the input pixel; and adjusting the luminance value of the input pixel if the input pixel is determined a noise point. Using the noise reduction method of the present invention, not only noise of a digital image can be identified, but also the degradation caused by the noise can be reduced and thus the overall picture quality can be improved.
摘要翻译：本发明提供一种用于降低数字图像噪声的噪声降低方法，该方法包括以下步骤：在由第一色度和第二色度定义的坐标平面上定义为水平轴和垂直轴的目标窗口; 根据具有第一色度值和第二色度值的输入像素是否位于窗口内，确定噪声阈值; 根据输入像素的噪声阈值和相邻像素的亮度值来确定输入像素是否是噪声点; 以及如果所述输入像素被确定为噪声点，则调整所述输入像素的亮度值。使用本发明的降噪方法，不仅可以识别数字图像的噪声，而且可以降低由噪声引起的劣化，从而可以提高整体图像质量。

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