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公开(公告)号：US09135681B2
公开(公告)日：2015-09-15
申请号：US13608783
申请日：2012-09-10
CPC分类号： G06T5/002 , G06T5/20 , G06T2207/10024 , G06T2207/20192 , H04N1/409
摘要： An embodiment of a method for reducing chroma noise in digital image data and of a corresponding image processor. Chrominance components are subjected to low-pass filtering. The strength of the low-pass filtering is modulated in accordance with the dynamic range of the luminance signal and the dynamic range of each of the two chrominance signals in order to avoid color bleeding at image-object edges. Moreover, the low-pass filtering is selectively applied to pixels with similar luminance and chrominance values only. A combination of down-sampling and up-sampling units is employed so that comparatively small filter kernels may be used for removing chroma noise with low spatial frequency.
摘要翻译： 一种用于降低数字图像数据和对应的图像处理器中的色度噪声的方法的实施例。 色度分量经过低通滤波。 根据亮度信号的动态范围和两个色度信号中的每一个的动态范围来调制低通滤波的强度，以避免图像对象边缘的色彩渗透。 此外，低通滤波被选择性地应用于具有相似亮度和色度值的像素。 采用下采样和上采样单元的组合，使得可以使用较小的滤波器核来去除具有低空间频率的色度噪声。
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公开(公告)号：US20110052053A1
公开(公告)日：2011-03-03
申请号：US12547006
申请日：2009-08-25
申请人： Valeria Tomaselli , Mirko Guarnera
发明人： Valeria Tomaselli , Mirko Guarnera
IPC分类号： G06K9/00
摘要： An image processing apparatus suitable for processing a digital image in YCrCb color space, the image having an initial luminance plane Y and two initial Cr, Cb chrominance planes, the processing apparatus including a first block that receives the initial luminance plane Y of the digital image and processes and modifies the initial luminance plane Y in order to provide a modified luminance plane Y in output; a color artifact correction block, operating in parallel with the first block, the correction block receiving the initial planes Y, Cr, Cb of the image and modifying the initial chrominance planes Cr and Cb through a pixel by pixel processing approach with a mobile working window, the correction block having a false colors correction sub-block and a purple fringing correction sub-block, or both, the sub-blocks structured to modify values of the initial Cr, Cb chrominance planes based on information contained in the initial Cr, Cb chrominance planes and also based on information contained in the initial luminance plane Y.
摘要翻译： 一种适用于处理YCrCb色彩空间中的数字图像的图像处理装置，具有初始亮度平面Y和两个初始Cr，Cb色度平面的图像，所述处理装置包括接收数字图像的初始亮度平面Y的第一块 并处理和修改初始亮度平面Y，以便在输出中提供修改的亮度平面Y; 与第一块并行操作的彩色伪迹校正块，校正块接收图像的初始平面Y，Cr，Cb，并通过移动工作窗口逐像素处理方法修改初始色度面Cr和Cb 所述校正块具有假颜色校正子块和紫边条纹校正子块，或两者，所述子块被构造为基于初始Cr，Cb色度平面的值来修改初始Cr，Cb中包含的信息 并且还基于初始亮度平面Y中包含的信息。
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3.发明申请Method and system for de-mosaicing artifact removal, and computer program product therefor 有权拆除伪装的方法和系统及其计算机程序产品公开(公告)号：US20060087567A1
公开(公告)日：2006-04-27
申请号：US11252376
申请日：2005-10-18
IPC分类号： H04N9/73
CPC分类号： H04N9/045 , H04N2209/045 , H04N2209/046
摘要： Color image signals, as derived, e.g., by interpolating the output from a color filter array are arranged in pixels, each pixel having associated detected color information for a first color as well as undetected filled-in color information for at least a second and a third color. The images are thus exposed to false color and zipper effect artifacts, and are subject to processing preferably including the steps of: checking the images for the presence of zipper effect artifacts, and i) if said checking reveals the presence of zipper effect artifacts, applying a zipper effect removal process to said image signals; ii) if said checking fails to reveal the presence of zipper effect artifacts, applying a false color removal process to said image signals. False color and zipper effect artifacts are thus preferably both reduced by adaptively using the zipper effect removal process and the false color removal process.
摘要翻译： 例如，通过内插来自滤色器阵列的输出的彩色图像信号以像素排列，每个像素具有用于第一颜色的相关联的检测到的颜色信息以及未检测到的至少第二和第二颜色的填充颜色信息 第三色。 因此，图像暴露于假色和拉链效果伪像，并且经受处理优选包括以下步骤：检查图像中是否存在拉链效果伪像，以及i）如果所述检查显示出拉链效应伪像的存在，则应用 对所述图像信号的拉链效应去除处理; ii）如果所述检查不能揭示拉链效应伪像的存在，则对所述图像信号应用假色去除处理。 因此，优选通过自适应地使用拉链效果去除处理和假颜色去除处理来减少假色和拉链效果伪影。
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4.发明申请Color interpolation method of an image acquired by a digital sensor by directional filtering 有权通过定向滤波由数字传感器获取的图像的颜色插值方法公开(公告)号：US20060072814A1
公开(公告)日：2006-04-06
申请号：US11243212
申请日：2005-10-04
申请人： Giuseppe Messina , Mirko Guarnera , Valeria Tomaselli , Arcangelo Bruna , Giuseppe Spampinato , Alfio Castorina
发明人： Giuseppe Messina , Mirko Guarnera , Valeria Tomaselli , Arcangelo Bruna , Giuseppe Spampinato , Alfio Castorina
CPC分类号： G06T3/4015
摘要： Subdivision per basic color channels of grey level data generated by a color sensor is no longer required according to a novel color interpolation method of an image acquired by a digital color sensor generating grey levels for each image pixel as a function of the filter applied to the sensor by interpolating the values of missing colors of each image pixel for generating triplets or pairs of values of primary colors or complementary base hues for each image pixel. The method may include calculating spatial variation gradients of primary colors or complementary base hues for each image pixel and storing the information of directional variation of primary color or complementary base hue in look-up tables pertaining to each pixel. The method may further include interpolating color values of each image pixel considering the directional variation information of the respective values of primary colors or complementary hues stored in the respective look-up tables of the pixel for generating the multiple distinct values for each image pixel.
摘要翻译： 根据由数字颜色传感器获取的图像的新颖的颜色插值方法，由颜色传感器生成的灰度级数据的每个基本色彩通道的细分作为对每个图像像素生成灰度的函数，作为应用于 通过内插每个图像像素的缺失颜色的值来生成每个图像像素的三元组或原色值或互补基色调的值对。 该方法可以包括计算每个图像像素的原色或互补基色调的空间变化梯度，并将原色或互补基色调的方向变化的信息存储在与每个像素相关的查找表中。 该方法还可以包括考虑存储在像素的各个查找表中的原色或互补色调的各个值的方向变化信息来考虑每个图像像素的颜色值，以生成每个图像像素的多个不同值。
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公开(公告)号：US08520969B2
公开(公告)日：2013-08-27
申请号：US12547006
申请日：2009-08-25
申请人： Valeria Tomaselli , Mirko Guarnera
发明人： Valeria Tomaselli , Mirko Guarnera
IPC分类号： G06K9/40
摘要： An image processing apparatus suitable for processing a digital image in YCrCb color space, the image having an initial luminance plane Y and two initial Cr, Cb chrominance planes, the processing apparatus including a first block that receives the initial luminance plane Y of the digital image and processes and modifies the initial luminance plane Y in order to provide a modified luminance plane Y in output; a color artifact correction block, operating in parallel with the first block, the correction block receiving the initial planes Y, Cr, Cb of the image and modifying the initial chrominance planes Cr and Cb through a pixel by pixel processing approach with a mobile working window, the correction block having a false colors correction sub-block and a purple fringing correction sub-block, or both, the sub-blocks structured to modify values of the initial Cr, Cb chrominance planes based on information contained in the initial Cr, Cb chrominance planes and also based on information contained in the initial luminance plane Y.
摘要翻译： 一种适用于处理YCrCb色彩空间中的数字图像的图像处理装置，具有初始亮度平面Y和两个初始Cr，Cb色度平面的图像，所述处理装置包括接收数字图像的初始亮度平面Y的第一块 并处理和修改初始亮度平面Y，以便在输出中提供修改的亮度平面Y; 与第一块并行操作的彩色伪迹校正块，校正块接收图像的初始平面Y，Cr，Cb，并通过移动工作窗口逐像素处理方法修改初始色度面Cr和Cb 所述校正块具有假颜色校正子块和紫边条纹校正子块，或两者，所述子块被构造为基于初始Cr，Cb色度平面的值来修改初始Cr，Cb中包含的信息 并且还基于初始亮度平面Y中包含的信息。
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公开(公告)号：US07305148B2
公开(公告)日：2007-12-04
申请号：US11190571
申请日：2005-07-27
IPC分类号： G06K9/32
CPC分类号： G06T3/4015 , H04N9/045 , H04N2209/046
摘要： A fast method of color interpolation of pixels of an image acquired by a color filtered digital sensor uses a very simple cost function that nevertheless produce interpolated images of good quality. The cost function is computationally simpler because it does not require the calculation of powers and square roots. The triangulation algorithm may be executed in far less time, while practically ensuring the same performance. The triangulation algorithm on average may use only two iteration steps. The interpolation process may be followed by an anti-aliasing processing that effectively removes color artifacts.
摘要翻译： 由彩色滤波数字传感器获取的图像的像素的彩色插值的快速方法使用非常简单的成本函数，其仍然产生良好质量的内插图像。 成本函数在计算上更简单，因为它不需要功率和平方根的计算。 三角测量算法可以在更短的时间内执行，同时实际确保相同的性能。 平均三角测量算法只能使用两个迭代步骤。 插值过程之后可以是有效地去除颜色伪影的抗混叠处理。
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公开(公告)号：US20060022997A1
公开(公告)日：2006-02-02
申请号：US11190571
申请日：2005-07-27
IPC分类号： G09G5/00
CPC分类号： G06T3/4015 , H04N9/045 , H04N2209/046
摘要： A fast method of color interpolation of pixels of an image acquired by a color filtered digital sensor uses a very simple cost function that nevertheless produce interpolated images of good quality. The cost function is computationally simpler because it does not require the calculation of powers and square roots. The triangulation algorithm may be executed in far less time, while practically ensuring the same performance. The triangulation algorithm on average may use only two iteration steps. The interpolation process may be followed by an anti-aliasing processing that effectively removes color artifacts.
摘要翻译： 由彩色滤波数字传感器获取的图像的像素的彩色插值的快速方法使用非常简单的成本函数，其仍然产生良好质量的内插图像。 成本函数在计算上更简单，因为它不需要功率和平方根的计算。 三角测量算法可以在更短的时间内执行，同时实际确保相同的性能。 平均三角测量算法只能使用两个迭代步骤。 插值过程之后可以是有效地去除颜色伪影的抗混叠处理。
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8.发明授权Method and system for processing video signals, for example for displaying on a small sized color display, and corresponding computer program product 有权用于处理视频信号的方法和系统，例如用于在小尺寸彩色显示器上显示以及相应的计算机程序产品公开(公告)号：US07630003B2
公开(公告)日：2009-12-08
申请号：US10732186
申请日：2003-12-10
CPC分类号： H04N5/23293 , H04N9/73
摘要： A method of processing digital video signals produced by a sensor that are to be presented on a viewfinder, the method involving: a first pair of processing operations for scaling and color interpolation; and a second pair of processing operations for the formation of a color matrix and for white balancing. The operations of at least one, and preferably of both of the pairs of processing operations are executed in a single step. The operation of white balancing is moreover performed only for one frame out of K frame in the frame sequence. The preferential application is in the construction of viewfinders for videocameras and digital still cameras.
摘要翻译： 一种处理要呈现在取景器上的由传感器产生的数字视频信号的方法，所述方法涉及：用于缩放和颜色插值的第一对处理操作; 以及用于形成彩色矩阵和用于白平衡的第二对处理操作。 在一个步骤中执行至少一个，优选两个处理操作对的操作。 此外，在帧序列中仅对K帧中的一帧执行白平衡的操作。 优先应用是为视频摄像机和数码相机拍摄取景器。
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公开(公告)号：US08498496B2
公开(公告)日：2013-07-30
申请号：US12969252
申请日：2010-12-15
CPC分类号： G06K9/0061 , G06K9/00604
摘要： Processing method of a digital image to filter red and/or golden eye artifacts, the digital image comprising a plurality of pixel each comprising at least one digital value represented on a plurality of bits, the method comprising: a step of selecting at least one patch of pixels of the digital image comprising pixels potentially representative of a red and/or golden eye artifact; a step of classifying the at least one patch of pixels as “eye” or “non-eye”; a step of filtering said potentially representative pixels if said patch of pixels is classified as “eye”; wherein the classifying step comprises the operations of: converting the digital values of said patch of pixels into a Gray Code representation, overall obtaining a plurality of bit maps from said patch of pixels, each bit map being associated with a respective bit of said Gray Code; an operation of individually comparing said bit maps with corresponding bit map models belonging to a patch classifier produced by a statistical analysis of bit maps obtained by converting patches of pixels of digital images containing or not red and/or golden eye artifacts into said Gray Code representation.
摘要翻译： 一种数字图像的处理方法，用于对红色和/或金色眼睛伪像进行滤波，该数字图像包括多个像素，每个像素包括在多个位上表示的至少一个数字值，该方法包括：选择至少一个贴片 所述数字图像的像素包括可能代表红色和/或金色眼睛伪影的像素; 将至少一个像素块分类为“眼睛”或“非眼睛”的步骤; 如果所述像素块被分类为“眼睛”，则过滤所述潜在代表性像素的步骤; 其中所述分类步骤包括以下操作：将所述像素块的数字值转换为格雷码表示，总体上从所述补丁像素获得多个位图，每个位图与所述格雷码的相应位相关联 ; 单独比较所述比特图与归属于通过将包含或不包含红色和/或金色眼睛伪像的数字图像的像素的片段转换成所述格雷码表示而获得的比特图的统计分析产生的补丁分类器的相应比特图模型的操作 。
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10.发明申请公开(公告)号：US20110158511A1
公开(公告)日：2011-06-30
申请号：US12969252
申请日：2010-12-15
CPC分类号： G06K9/0061 , G06K9/00604
摘要： Processing method of a digital image to filter red and/or golden eye artifacts, the digital image comprising a plurality of pixel each comprising at least one digital value represented on a plurality of bits, the method comprising: a step of selecting at least one patch of pixels of the digital image comprising pixels potentially representative of a red and/or golden eye artifact; a step of classifying the at least one patch of pixels as “eye” or “non-eye”; a step of filtering said potentially representative pixels if said patch of pixels is classified as “eye”; wherein the classifying step comprises the operations of: converting the digital values of said patch of pixels into a Gray Code representation, overall obtaining a plurality of bit maps from said patch of pixels, each bit map being associated with a respective bit of said Gray Code; an operation of individually comparing said bit maps with corresponding bit map models belonging to a patch classifier produced by a statistical analysis of bit maps obtained by converting patches of pixels of digital images containing or not red and/or golden eye artifacts into said Gray Code representation.
摘要翻译： 一种数字图像的处理方法，用于对红色和/或金色眼睛伪像进行滤波，该数字图像包括多个像素，每个像素包括在多个位上表示的至少一个数字值，该方法包括：选择至少一个贴片 所述数字图像的像素包括可能代表红色和/或金色眼睛伪影的像素; 将至少一个像素块分类为“眼睛”或“非眼睛”的步骤; 如果所述像素块被分类为“眼睛”，则过滤所述潜在代表性像素的步骤; 其中所述分类步骤包括以下操作：将所述像素块的数字值转换为格雷码表示，总体上从所述补丁像素获得多个位图，每个位图与所述格雷码的相应位相关联 ; 单独比较所述比特图与归属于通过将包含或不包含红色和/或金色眼睛伪像的数字图像的像素的片段转换成所述格雷码表示而获得的比特图的统计分析产生的补丁分类器的相应比特图模型的操作 。
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