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1. 发明授权

US09111339B1 System and method for reducing noise from an image 有权
标题翻译：降低图像噪声的系统和方法
公开(公告)号：US09111339B1
公开(公告)日：2015-08-18
申请号：US14338973
申请日：2014-07-23
申请人： Marvell International Ltd.
发明人： Samson Huang , Yuning Yang , Ping-Sing Tsai
IPC分类号： G06K9/40 , G06T5/00
CPC分类号： G06T5/002 , G06T5/10 , G06T2207/10024 , G06T2207/20016 , G06T2207/20064
摘要： Systems and methods for reducing noise in an image are provided. Noise is reduced in a luminance channel of the image using a first filtering procedure. Noise is reduced in a chrominance channel of the image using a second filtering procedure. The chrominance channel is decomposed into a plurality of frequency sub-bands, where each frequency sub-band of the plurality of frequency sub-bands represents the chrominance channel at a first resolution. The noise is further reduced in the chrominance channel using a third filtering procedure. The third filtering procedure is applied to each frequency sub-band of the plurality of frequency sub-bands. A lowest frequency sub-band of the plurality of frequency sub-bands is decomposed into a second plurality of frequency sub-bands after the third filtering procedure. Each frequency sub-band of the second plurality of frequency sub-bands represents the chrominance channel at a second resolution that is lower than the first resolution.
摘要翻译：提供了用于降低图像噪声的系统和方法。使用第一滤波过程在图像的亮度通道中降低噪声。使用第二滤波过程在图像的色度通道中降低噪声。色度信道被分解成多个频率子带，其中多个频率子带中的每个频率子带以第一分辨率表示色度信道。使用第三滤波过程在色度信道中进一步降低噪声。第三滤波过程被应用于多个频率子带中的每个频率子带。在第三滤波过程之后，多个频率子带中的最低频率子带被分解成第二多个频率子带。第二多个频率子带中的每个频率子带表示低于第一分辨率的第二分辨率的色度信道。

2. 发明授权

US09025057B1 Gain value interpolation 有权
标题翻译：增益值插值
公开(公告)号：US09025057B1
公开(公告)日：2015-05-05
申请号：US14107523
申请日：2013-12-16
申请人： Marvell International Ltd.
发明人： Adam George , Bradley C. Aldrich , Ping-Sing Tsai
IPC分类号： H04N9/64 , H04N5/217 , G06T5/00
CPC分类号： G06T5/002 , G06T5/008 , G06T2207/20021 , H04N5/3572
摘要： An apparatus, method, and other embodiments associated with performing interpolations to compute gain values that correct for varying spatial intensity are described. In one embodiment, a method includes determining, by an apparatus that processes image data, a gain value for a pixel in the image data for which there is no gain value available in the apparatus, by interpolating related gain values associated with corners of a rectangle bounding the pixel, wherein the interpolating includes determining at least two partial coefficients by interpolating pairs of the related gain values. Noise is filtered from the image data using a noise threshold, and the noise threshold is modified by using the at least two partial coefficients. The method also applies the gain value to the pixel in the image data.
摘要翻译：描述了与执行内插以计算校正变化的空间强度的增益值相关联的装置，方法和其他实施例。在一个实施例中，一种方法包括：通过处理图像数据的装置，通过内插与矩形角的关联的相关增益值，确定在该装置中没有可用增益值的图像数据中的像素的增益值限制像素，其中内插包括通过内插相关增益值的对来确定至少两个部分系数。使用噪声阈值从图像数据滤波噪声，并且通过使用至少两个部分系数来修改噪声阈值。该方法还将增益值应用于图像数据中的像素。

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