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1.发明授权Post-processing method for reducing artifacts in block-coded digital images, and post-processing device for actuating such method 失效用于减少块编码数字图像中的伪影的后处理方法，以及用于致动这种方法的后处理装置公开(公告)号：US07373014B1
公开(公告)日：2008-05-13
申请号：US09087671
申请日：1998-05-29
申请人： Massimo Mancuso , Rinaldo Poluzzi
发明人： Massimo Mancuso , Rinaldo Poluzzi
IPC分类号： G06K9/40
CPC分类号： H04N19/527 , H04N19/86
摘要： A post-processing method reduces artifacts in block-coded digital images. The method includes: dividing an input image into a plurality of image blocks; for each image block, estimating global features of said image block providing information on an average content of image edges along the horizontal and vertical directions of said image block; for each pixel of an image block under examination, estimating local features for said pixel providing information on the content of image edges along the horizontal and vertical directions of an image area near said pixel; modifying the value of said pixel according to both said global features of the image block to which said pixel belongs and said local features of the image area near said pixel.
摘要翻译： 后处理方法减少块编码数字图像中的伪像。 该方法包括：将输入图像分割成多个图像块; 对于每个图像块，估计所述图像块的全局特征，提供关于沿着所述图像块的水平和垂直方向的图像边缘的平均内容的信息; 对于所检查的图像块的每个像素，估计所述像素的局部特征，提供关于沿所述像素附近的图像区域的水平和垂直方向的图像边缘的内容的信息; 根据所述像素所属的图像块的所述全局特征和所述像素附近的图像区域的所述局部特征来修改所述像素的值。
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公开(公告)号：US6034741A
公开(公告)日：2000-03-07
申请号：US558596
申请日：1995-10-30
CPC分类号： G06T5/20 , H03H2222/02
摘要： A filter performs a reduction of pulsed noise in video images in accordance with fuzzy logic. An interface circuit of the filter receives consecutive digital signals in time corresponding to the video images and generates an image window having a digital signal to be processed at the center. The filter also has a comparator block, a plurality of digital subtractors, and a memory circuit connected in cascade to the comparator block. The filter also has a filtering circuit that organizes values of digital signals of the video image, and an arithmetic block that performs a switch between the digital signal to be processed and the output of the filtering circuit on the basis of the values taken by the parameter.
摘要翻译： 滤波器根据模糊逻辑执行视频图像中的脉冲噪声的降低。 滤波器的接口电路在对应于视频图像的时间中接收连续的数字信号，并产生具有要在中心处理的数字信号的图像窗口。 滤波器还具有比较器块，多个数字减法器和与比较器块级联连接的存储器电路。 滤波器还具有组合视频图像的数字信号的值的滤波电路，以及基于由参数取得的值执行要处理的数字信号和滤波电路的输出之间的切换的运算块 。
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3.发明授权Edge-oriented intra-field/inter-field interpolation filter for improved quality video appliances 失效面向边缘的场内/场间插值滤波器，用于改进质量的视频设备
公开(公告)号：US5929918A
公开(公告)日：1999-07-27
申请号：US801950
申请日：1997-02-12
CPC分类号： H04N7/012 , H04N7/0132
摘要： An interpolation filter for video signals includes four circuits to improve video quality in both intra-field and inter-field modes. The interpolation filter is configured to interpolate according to the direction of an image edge. The interpolation filter is also configured to interpolate in a prescribed spatial direction when no image edges can be univocally determined. The first circuit detects an image edge of discrete image elements to generate a first signal. The second circuit uses output from the first circuit to generate a first signal corresponding to an average of the discrete image elements along a direction of the image edge. The third circuit uses output from the first circuit to detect a texture image area wherein an image edge cannot be univocally determined and for generating a second signal depending on a degree of existence of the image edge. The fourth circuit is supplied by the first signal, the second signal and a third signal. The fourth circuit generates an output signal obtained by combining the first signal with the third signal in a proportion dependent upon the second signal. Additionally, the fourth circuit is configured for multiplexing to selectively couple the third signal to a fourth signal, corresponding to an average of the discrete image elements along a prescribed direction, or to a fifth signal corresponding to a previously received image element value.
摘要翻译： 用于视频信号的内插滤波器包括四个电路，以改善场内和场外模式中的视频质量。 内插滤波器被配置为根据图像边缘的方向进行插值。 内插滤波器也被配置为当不能确定图像边缘时，在规定的空间方向内插。 第一电路检测离散图像元素的图像边缘以产生第一信号。 第二电路使用来自第一电路的输出来产生对应于沿着图像边缘的方向的离散图像元素的平均值的第一信号。 第三电路使用来自第一电路的输出来检测纹理图像区域，其中图像边缘不能被单一地确定，并且用于根据图像边缘的存在程度产生第二信号。 第四电路由第一信号，第二信号和第三信号提供。 第四电路产生通过将第一信号与第三信号以取决于第二信号的比例组合而获得的输出信号。 此外，第四电路被配置为用于多路复用以选择性地将第三信号耦合到对应于沿着规定方向的离散图像元素的平均值的第四信号，或者对应于先前接收到的图像元素值的第五信号。
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公开(公告)号：US5680179A
公开(公告)日：1997-10-21
申请号：US534000
申请日：1995-09-27
CPC分类号： H04N9/646 , H04N5/21 , H03H2222/02
摘要： A device for filtering video images, of the type which includes first and second circuit portions, each having first and second input terminals respectively adapted to receive digitalized luminance and chrominance components of a television signal, and an output terminal coinciding with an output terminal of the device. The first and second circuit portions further include first, second and third filters, cascade coupled to one another, and a fourth filter, respectively. The first, second and third filters incorporate a computational circuit which uses a logic of the fuzzy type to process the digitalized luminance component. The fourth filter includes a computational circuit which processes the digitalized chrominance components based upon a parameter supplied from the second filter.
摘要翻译： 一种用于对包括第一和第二电路部分的类型的视频图像进行滤波的装置，每个具有分别适于接收电视信号的数字化亮度和色度分量的第一和第二输入端子，以及与输出端子重合的输出端子 设备。 第一和第二电路部分还包括分别彼此耦合的级联和第四滤波器的第一，第二和第三滤波器。 第一，第二和第三滤波器包括使用模糊类型的逻辑来处理数字化亮度分量的计算电路。 第四滤波器包括基于从第二滤波器提供的参数来处理数字化色度分量的计算电路。
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5.发明授权Fuzzy logic filter for reducing noise and sharpening edges of digital image signals 失效模糊逻辑滤波器，用于减少数字图像信号的噪声和锐化边缘
公开(公告)号：US5757977A
公开(公告)日：1998-05-26
申请号：US396212
申请日：1995-02-28
CPC分类号： G06T5/20 , H03H2222/02
摘要： A filter achieving noise reduction and digital signal image edge enhancement includes two noise reduction circuits designed to enhance an image edge. The noise reduction circuits comprise both comparison units, which receive separate digital signals of an image and an inferential circuit connected to said comparison elements. Each inferential circuit uses a fuzzy logic unit designed to define activation levels based on signals generated by the comparison elements. The filter also includes a noise detection circuit and an image edge detection circuit both connected to the noise reduction circuit and designed to perform operations in accordance with fuzzy logic rules on the basis of the activation levels defined in the inferential circuits. The filter also includes a noise reduction circuit connected to the noise detection circuit and is designed to filter the digital image signals on the basis of the operations performed by the noise detection circuit. The filter additionally includes an image edge enhancement circuit connected to the noise reduction circuit and to the image edge detection circuit and is designed to perform on filtered digital image signals image edge enhancement on the basis of the operations performed by the image edge detection circuit.
摘要翻译： 实现噪声降低和数字信号图像边缘增强的滤波器包括设计用于增强图像边缘的两个降噪电路。 噪声降低电路包括两个比较单元，它们接收图像的单独数字信号和连接到所述比较元件的推理电路。 每个推理电路使用一个模糊逻辑单元，设计用于基于比较元件产生的信号定义激活电平。 滤波器还包括噪声检测电路和图像边缘检测电路，两者均连接到降噪电路，并被设计为基于在推导电路中定义的激活电平来根据模糊逻辑规则执行操作。 滤波器还包括连接到噪声检测电路的噪声降低电路，并且被设计为基于由噪声检测电路执行的操作来对数字图像信号进行滤波。 滤波器还包括连接到噪声降低电路和图像边缘检测电路的图像边缘增强电路，并且被设计为基于由图像边缘检测电路执行的操作对滤波的数字图像信号图像边缘增强执行。
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6.发明授权Fuzzy logic based filter architecture for video applications and corresponding filtering method 失效用于视频应用的基于模糊逻辑的滤波器架构和相应的滤波方法
公开(公告)号：US5659370A
公开(公告)日：1997-08-19
申请号：US427081
申请日：1995-04-21
CPC分类号： H04N7/012 , H04N5/21 , H04N7/0132 , H04N9/646 , H03H2222/02 , Y10S706/90
摘要： A filter architecture for high-resolution video applications of the type comprising at least one filter block having a plurality of digital inputs which receive through an interface components of a television signal and some outputs through which to take the result of a filtering operation for noise associated with the television signal also comprises in the filter block at least one interpolator block connected to said inputs and operating with fuzzy logic to execute a television signal scanning conversion to be presented on additional outputs of the filter block.
摘要翻译： 一种用于高分辨率视频应用的滤波器架构，其包括具有多个数字输入的至少一个滤波器块，所述多个数字输入通过接口的电路信号和一些输出的接收部分接收，以获得噪声相关联的滤波操作的结果 电视信号还在滤波器块中还包括连接到所述输入的至少一个内插器块，并且以模糊逻辑运行以执行要在滤波器块的附加输出上呈现的电视信号扫描转换。
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7.发明授权公开(公告)号：US06272239B1
公开(公告)日：2001-08-07
申请号：US09222247
申请日：1998-12-28
申请人： Federica Colla , Massimo Mancuso , Rinaldo Poluzzi
发明人： Federica Colla , Massimo Mancuso , Rinaldo Poluzzi
IPC分类号： G06K900
摘要： A digital image color correction device and method employing fuzzy logic, for correcting a facial tone image portion of a digital video image is provided. The device is a pixel fuzzifier unit (1) receiving in input a stream of pixels belonging to a sequence of correlated frames of a digital video image and computing a multilevel value representing a membership of each pixel to a skin color class; a global parameter estimator (2) receiving in input each of said pixel and the relative membership value, and computing a first and a second parameter which define the characteristics of a portion of said image that belongs to said skin color class; a processing unit (3) connected downstream to said global parameter estimator and to said pixel fuzzifier unit and adapted to correct each of the pixels of said portion of the image that belongs to said skin color class, according to said first global parameter (300), to obtain corrected pixels; and a processing switch (4) for outputting said pixels or said corrected pixels according to said second global parameter (400).
摘要翻译： 提供一种使用模糊逻辑的数字图像颜色校正装置和方法，用于校正数字视频图像的面部色调图像部分。 所述设备是像素模糊器单元（1），其在输入端接收属于数字视频图像的相关帧的序列的像素流，并且将表示每个像素的隶属度的多值值计算到肤色等级; 全局参数估计器（2），其中输入每个所述像素和相对隶属值，以及计算定义所述图像的属于所述皮肤颜色等级的部分的特征的第一和第二参数; 连接到所述全局参数估计器的下游的处理单元（3）和所述像素模糊器单元，并且适于根据所述第一全局参数（300）校正属于所述皮肤颜色等级的所述图像的所述部分的每个像素， ，以获得校正像素; 以及用于根据所述第二全局参数（400）输出所述像素或所述校正像素的处理开关（4）。
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公开(公告)号：US5748796A
公开(公告)日：1998-05-05
申请号：US519056
申请日：1995-08-24
CPC分类号： G06T5/20
摘要： A fuzzy device for image noise reduction, includes an interface adapted to retrieve the gray level of a pixel to be processed of an image and of neighbouring pixels; a difference circuit connected to the interface and adapted to generate a difference of the gray levels between said neighbouring pixels and said pixels to be processed; a fuzzy flat area smoothing circuit connected to the difference circuit and adapted to perform a low-pass smoothing of an almost homogeneous region defined by said pixel and by said neighbouring pixels; an edge preserving smoothing circuit connected to the difference circuit and adapted to perform low-pass filtering on a high-frequency information region defined by the pixel and by the neighbouring pixels; a region voter circuit connected to the interface and adapted to give a measure for considering whether the region defined by the pixel and the neighbouring pixels is almost homogeneous; and a soft switching circuit connected to the outputs of the smoothing circuit and adapted to perform the weighting of the outputs of the smoothing circuit on the basis of the measure.
摘要翻译： 一种用于图像噪声降低的模糊设备，包括适于检索要处理的图像和相邻像素的像素的灰度级的接口; 连接到所述接口并适于产生所述相邻像素与要处理的像素之间的灰度级差的差分电路; 连接到差分电路的模糊平坦区域平滑电路，并且适于执行由所述像素和所述相邻像素限定的几乎均匀的区域的低通平滑化; 连接到所述差分电路并适于对由所述像素和所述相邻像素定义的高频信息区域执行低通滤波的边缘保持平滑电路; 连接到界面的区域选举电路，并且适于给出用于考虑由像素和相邻像素定义的区域是否几乎是均匀的度量; 以及软切换电路，连接到平滑电路的输出，并且适于基于该测量执行平滑电路的输出的加权。
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公开(公告)号：US5589890A
公开(公告)日：1996-12-31
申请号：US314862
申请日：1994-09-29
CPC分类号： H04N5/20 , H03H2222/02
摘要： A filter architecture particularly for video applications, includes a filter section for separating high pass and low pass components from a video input signal conveying a video image, a brilliance estimating section for determining a mean brilliance value for each of a plurality of sections into which the video image is divided, first and second image characteristic adjusting sections for modifying the high pass and low pass components in response to the mean brilliance values, and a summing section for combining the modified high pass and low pass components to generate a filtered video signal. The first and second image characteristic adjusting sections operate using Fuzzy Logic which enables the filter architecture to effectively adjust contrast and brightness in the video image over a wide range of image brightness values.
摘要翻译： 特别是用于视频应用的滤波器结构包括用于从传送视频图像的视频输入信号中分离高通和低通分量的滤波器部分，用于确定多个部分中的每一个的平均亮度值的光亮度估计部分， 视频图像是用于响应于平均亮度值来修改高通和低通分量的分割的第一和第二图像特征调整部分，以及用于组合经修改的高通和低通分量以产生经滤波的视频信号的求和部分。 第一和第二图像特征调整部分使用模糊逻辑进行操作，其使滤波器结构能够在宽范围的图像亮度值上有效地调整视频图像中的对比度和亮度。
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公开(公告)号：US06256414B1
公开(公告)日：2001-07-03
申请号：US09067443
申请日：1998-04-28
IPC分类号： G06K936
CPC分类号： H04N1/40 , H04N2101/00
摘要： A digital photography apparatus, particularly a digital still camera, includes circuit portions for acquiring a digital image, and for obtaining a compressed image. The apparatus also includes a memory for storing the compressed image. A processor is provided for obtaining a processed image and corresponding processing parameters from the image acquired. The processor supplies as an output, in a first operative condition, the processed image to be compressed by the compression circuit portion. In a second operative condition, the processor supplies as an output the image acquired to be compressed by the compression portion and the processing parameters to be stored in the memory.
摘要翻译： 数字摄影装置，特别是数字静态照相机，包括用于获取数字图像的电路部分，并且用于获得压缩图像。 该装置还包括用于存储压缩图像的存储器。 提供了一种处理器，用于从所获取的图像中获得经处理的图像和相应的处理参数。 处理器在第一操作条件下提供要由压缩电路部分压缩的经处理的图像作为输出。 在第二操作条件下，处理器作为输出获取被压缩部分压缩的图像和要存储在存储器中的处理参数。
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