公开(公告)号：US20060245506A1

公开(公告)日：2006-11-02

申请号：US11121819

申请日：2005-05-02

申请人： Peng Lin ,  Yeong-Taeg Kim ,  Seong-Joo Lee

发明人： Peng Lin ,  Yeong-Taeg Kim ,  Seong-Joo Lee

IPC分类号： H04B1/66

CPC分类号： H04N19/86 ,  H04N19/117 ,  H04N19/14 ,  H04N19/17 ,  H04N19/60 ,  H04N19/80

摘要： A ringing area detector classifies the input image into two regions: a mosquito noise region (i.e. filtering region) and a non-mosquito noise region (i.e. non-filtering region), and uses this classification information to adaptively remove the mosquito noise in a mosquito noise reduction system. The mosquito noise reduction system includes a ringing area detector, a local noise power estimator, a smoothing filter, and a mixer. The ringing area detector includes an edge detector, a near edge detector, a texture detector, and a filtering region decision block. The ringing detection block detects the ringing area where the smoothing filter is to be applied. The local noise power estimator controls the filter strength of the smoothing filter. The smoothing filter smoothes the input image. The mixer mixes the smoothed image and the original image properly based on the region information from the ringing area detection block.

摘要翻译： 振铃区域检测器将输入图像分为两个区域：蚊子噪声区域（即滤波区域）和非蚊子区域（即非滤波区域），并使用该分类信息自适应地消除蚊子中的蚊子噪声 降噪系统 蚊式降噪系统包括振铃区域检测器，局部噪声功率估计器，平滑滤波器和混频器。 振铃区域检测器包括边缘检测器，近边缘检测器，纹理检测器和滤波区域判定块。 振铃检测块检测要应用平滑滤波器的振铃区域。 本地噪声功率估计器控制平滑滤波器的滤波器强度。 平滑滤波器平滑输入图像。 混合器根据来自振铃区域检测块的区域信息正确地混合平滑图像和原始图像。

公开(公告)号：US07657098B2

公开(公告)日：2010-02-02

申请号：US11121819

申请日：2005-05-02

申请人： Peng Lin ,  Yeong-Taeg Kim ,  Seong-Joo Lee

发明人： Peng Lin ,  Yeong-Taeg Kim ,  Seong-Joo Lee

IPC分类号： G06K9/48

CPC分类号： H04N19/86 ,  H04N19/117 ,  H04N19/14 ,  H04N19/17 ,  H04N19/60 ,  H04N19/80

摘要： A ringing area detector classifies the input image into two regions: a mosquito noise region (i.e. filtering region) and a non-mosquito noise region (i.e. non-filtering region), and uses this classification information to adaptively remove the mosquito noise in a mosquito noise reduction system. The mosquito noise reduction system includes a ringing area detector, a local noise power estimator, a smoothing filter, and a mixer. The ringing area detector includes an edge detector, a near edge detector, a texture detector, and a filtering region decision block. The ringing detection block detects the ringing area where the smoothing filter is to be applied. The local noise power estimator controls the filter strength of the smoothing filter. The smoothing filter smoothes the input image. The mixer mixes the smoothed image and the original image properly based on the region information from the ringing area detection block.

摘要翻译： 振铃区域检测器将输入图像分为两个区域：蚊子噪声区域（即滤波区域）和非蚊子区域（即非滤波区域），并使用该分类信息自适应地消除蚊子中的蚊子噪声 降噪系统 蚊式降噪系统包括振铃区域检测器，局部噪声功率估计器，平滑滤波器和混频器。 振铃区域检测器包括边缘检测器，近边缘检测器，纹理检测器和滤波区域判定块。 振铃检测块检测要应用平滑滤波器的振铃区域。 本地噪声功率估计器控制平滑滤波器的滤波器强度。 平滑滤波器平滑输入图像。 混合器根据来自振铃区域检测块的区域信息正确地混合平滑图像和原始图像。

公开(公告)号：US07808558B2

公开(公告)日：2010-10-05

申请号：US11799345

申请日：2007-04-30

申请人： Peng Lin ,  Yeong-Taeg Kim

发明人： Peng Lin ,  Yeong-Taeg Kim

IPC分类号： H04N5/00 ,  H04N5/21 ,  H04N9/68 ,  G06K9/20 ,  G06K9/40

CPC分类号： H04N9/646

摘要： A superior Color Transient Improvement technique is adaptive to the local image features, so that more natural color edge transition improvement can be accomplished. A gain control function is provided that depends on the local image feature so that different regions of the image can be treated differently. Further, a correction signal is controlled in such a way (by the local image feature) that neither undershoot nor overshoot occurs, eliminating the need for post-processing for undershoot/overshoot removal.

摘要翻译： 优异的色彩瞬态改进技术适用于局部图像特征，从而可以实现更自然的色彩边缘转换改进。 提供了取决于本地图像特征的增益控制功能，使得图像的不同区域可以被不同地对待。 此外，校正信号以这样的方式（通过局部图像特征）被控制，既不会发生下冲也不产生超调，因此不需要后处理用于下冲/过冲去除。

公开(公告)号：US20070200958A1

公开(公告)日：2007-08-30

申请号：US11799345

申请日：2007-04-30

申请人： Peng Lin ,  Yeong-Taeg Kim

发明人： Peng Lin ,  Yeong-Taeg Kim

IPC分类号： H04N5/21

CPC分类号： H04N9/646

摘要： A superior Color Transient Improvement technique is adaptive to the local image features, so that more natural color edge transition improvement can be accomplished. A gain control function is provided that depends on the local image feature so that different regions of the image can be treated differently. Further, a correction signal is controlled in such a way (by the local image feature) that neither undershoot nor overshoot occurs, eliminating the need for post-processing for undershoot/overshoot removal.

公开(公告)号：US07260272B2

公开(公告)日：2007-08-21

申请号：US10617064

申请日：2003-07-10

申请人： Peng Lin ,  Yeong-Taeg Kim

发明人： Peng Lin ,  Yeong-Taeg Kim

IPC分类号： G06K9/40

CPC分类号： G06K9/40 ,  G06T5/002 ,  G06T5/10 ,  G06T2207/10016 ,  G06T2207/20064

摘要： An improved noise reduction process by wavelet thresholding utilizes a discrete wavelet transform to decompose the image into different resolution levels. A thresholding function is then applied in different resolution levels with different threshold values to eliminate insignificant wavelet coefficients which mainly correspond to the noise in the original image. Finally, an inverse discrete wavelet transform is applied to generate the noise-reduced video image. The threshold values are based on the relationships between the noise standard deviations of different decomposition levels in the wavelet domain and the noise standard deviation of the original image.

摘要翻译： 通过小波阈值处理改进的降噪过程利用离散小波变换将图像分解成不同的分辨率级别。 然后将阈值函数应用于具有不同阈值的不同分辨率级别，以消除主要对应于原始图像中的噪声的无意义的小波系数。 最后，应用逆离散小波变换来生成降噪视频图像。 阈值基于小波域中不同分解级别的噪声标准偏差与原始图像的噪声标准偏差之间的关系。

公开(公告)号：US07330218B2

公开(公告)日：2008-02-12

申请号：US10934025

申请日：2004-09-02

申请人： Peng Lin ,  Yeong-Taeg Kim

发明人： Peng Lin ,  Yeong-Taeg Kim

IPC分类号： H04N5/21 ,  H04N5/14

CPC分类号： H04N5/21 ,  Y10S348/91

摘要： A video noise reduction system for reducing video noise in a sequence of video frames. In the video noise reduction system, a temporal filter computes multiple temporal average values for the video frames in different temporal directions. A motion detector computes multiple motion signal values for the video frames in different temporal directions. Finally, a control unit selects one of the temporal average values based on the motion signal values as output.

摘要翻译： 一种用于降低视频帧序列中的视频噪声的视频降噪系统。 在视频噪声降低系统中，时间滤波器在不同的时间方向上计算视频帧的多个时间平均值。 运动检测器在不同的时间方向上计算视频帧的多个运动信号值。 最后，控制单元基于运动信号值作为输出来选择时间平均值之一。

公开(公告)号：US07289163B2

公开(公告)日：2007-10-30

申请号：US10449189

申请日：2003-04-28

申请人： Peng Lin ,  Yeong-Taeg Kim

发明人： Peng Lin ,  Yeong-Taeg Kim

IPC分类号： H04N5/21

CPC分类号： H04N9/646 ,  G06T5/003 ,  G06T5/50 ,  G06T2207/10016 ,  G06T2207/10024 ,  G06T2207/20012 ,  G06T2207/20192 ,  H04N19/117 ,  H04N19/182 ,  H04N19/186 ,  H04N19/80

摘要： An improved method for color transient enhancement in an input video frame of pixels. The luminance value of a current pixel is compared to that of neighboring pixels. A correction value is determined and the chrominance value of the current pixel is “pushed” towards the neighboring pixel that has a luminance value closest to that of the current pixel, by adding the correction value to the current pixel's chrominance value. The original video frame is also separately processed using a CTI method, and the current pixel's corrected chrominance value is combined with the corresponding pixel in the output of the CTI processing by soft switching unit to generate an output video frame that is an enhanced version of the input video frame.

摘要翻译： 一种用于像素的输入视频帧中的色彩瞬态增强的改进方法。 将当前像素的亮度值与相邻像素的亮度值进行比较。 通过将校正值与当前像素的色度值相加，确定当前像素的色度值朝向具有最接近当前像素的亮度值的相邻像素的“推”。 原始视频帧也使用CTI方法单独处理，并且当前像素的校正色度值与软切换单元在CTI处理的输出中的相应像素组合以产生作为增强版本的输出视频帧 输入视频帧。

公开(公告)号：US07271851B2

公开(公告)日：2007-09-18

申请号：US10345552

申请日：2003-01-16

申请人： Peng Lin ,  Yeong-Taeg Kim

发明人： Peng Lin ,  Yeong-Taeg Kim

IPC分类号： H04N5/00 ,  H04N5/21 ,  H04N9/68 ,  G06K9/40

CPC分类号： H04N9/646

摘要： A superior Color Transient Improvement technique is adaptive to the local image features, so that more natural color edge transition improvement can be accomplished. A gain control function is provided that depends on the local image feature so that different regions of the image can be treated differently. Further, a correction signal is controlled in such a way (by the local image feature) that neither undershoot nor overshoot occurs, eliminating the need for post-processing for undershoot/overshoot removal.

摘要翻译： 优异的色彩瞬态改进技术适用于局部图像特征，从而可以实现更自然的色彩边缘转换改进。 提供了取决于本地图像特征的增益控制功能，使得图像的不同区域可以被不同地对待。 此外，校正信号以这样的方式（通过局部图像特征）被控制，既不会发生下冲也不产生超调，因此不需要后处理用于下冲/过冲去除。

公开(公告)号：US20060221249A1

公开(公告)日：2006-10-05

申请号：US11094942

申请日：2005-03-30

申请人： Peng Lin ,  Yeong-Taeg Kim

发明人： Peng Lin ,  Yeong-Taeg Kim

IPC分类号： G06K9/40 ,  H04N5/00

CPC分类号： G06K9/40 ,  G06T5/002 ,  G06T5/20 ,  G06T2207/10016 ,  G06T2207/20012 ,  G06T2207/20192

摘要： A noise reduction system that not only preserves details in images but also provides essentially clean, smooth, and natural looking homogeneous regions in images. The noise reduction system utilizes a dual-channel adaptive noise reduction technique. The input signal is first split into two channels (i.e., a low-pass channel and a high-pass channel), by a channel splitting filter. Then the two channel signals are processed separately. The low-pass channel signal is processed using an adaptive directional filter based on the estimation of the local 2D and 1D statistics and the detection of the local image structure direction. The high-pass channel signal is processed by a non-linear filtering method based on the estimation of the local statistics and the noise level of the high-pass channel signal, which is derived from the noise level of the original input signal. The processed signals from the two channels are summed together to get the final output.

公开(公告)号：US20080002902A1

公开(公告)日：2008-01-03

申请号：US11853655

申请日：2007-09-11

申请人： Peng Lin ,  Yeong-Taeg Kim

发明人： Peng Lin ,  Yeong-Taeg Kim

IPC分类号： G06K9/40

CPC分类号： G06T5/002 ,  G06T5/20 ,  G06T2207/10016 ,  G06T2207/20008 ,  G06T2207/20012 ,  G06T2207/20192

摘要： A global and local statistics controlled noise reduction system in which the video image noise reduction processing is effectively adaptive to both image local structure and global noise level. A noise estimation method provides reliable global noise statistics to the noise reduction system. The noise reduction system dynamically/adaptively configures a local filter for processing each image pixel, and processes the pixel with that local filter. The filtering process of the noise reduction system is controlled by both global and local image statistics that are also computed by the system.

摘要翻译： 一种全局和局部统计控制噪声降低系统，其中视频图像降噪处理有效地适应图像局部结构和全局噪声水平。 噪声估计方法为噪声降低系统提供可靠的全局噪声统计。 降噪系统动态/自适应地配置本地滤波器以处理每个图像像素，并且使用该局部滤波器处理该像素。 降噪系统的滤波过程由系统计算的全局和局部图像统计控制。