公开(公告)号：US07865035B2

公开(公告)日：2011-01-04

申请号：US11246634

申请日：2005-10-06

Applicant: Peng Lin ,  Yeong-Taeg Kim

Inventor： Peng Lin ,  Yeong-Taeg Kim

IPC: G06K9/40 ,  G06K9/00 ,  H04N7/12 ,  H04N11/02 ,  H04N11/04

CPC classification number: H04N19/86 ,  H04N19/117 ,  H04N19/14 ,  H04N19/154 ,  H04N19/159 ,  H04N19/172 ,  H04N19/61

Abstract: A video quality adaptive coding artifact reduction system has a video quality analyzer, an artifact reducer, and a filter strength controller. The video quality analyzer employs input video quality analysis to control artifact reduction. The video quality analyzer accesses the video quality of the decoded video sequence to estimate the input video quality. The filter strength controller globally controls the filter strength of the artifact reducer based on the video quality estimate by the video quality analyzer. For low quality input video, the filter strength controller increases the artifact reduction filter strength to more efficiently reduce the artifact. For high quality input video, the filter strength controller decreases the artifact reduction filter strength to avoid blurring image detail.

Abstract translation: 视频质量自适应编码神器减少系统具有视频质量分析器，伪像减速器和滤波强度控制器。 视频质量分析仪采用输入视频质量分析来控制神器减少。 视频质量分析器访问解码视频序列的视频质量，以估计输入视频质量。 过滤强度控制器根据视频质量分析仪的视频质量估计，全局控制人造物减少器的过滤器强度。 对于低质量的输入视频，滤波器强度控制器增加了伪像降低滤波器的强度，以更有效地减少伪像。 对于高质量的输入视频，滤光片​​强度控制器可以减少伪影降低滤光片的强度，以避免图像细节模糊。

公开(公告)号：US07463688B2

公开(公告)日：2008-12-09

申请号：US10345555

申请日：2003-01-16

Applicant: Peng Lin ,  Yeong-Taeg Kim

Inventor： Peng Lin ,  Yeong-Taeg Kim

IPC: H04B1/66

CPC classification number: H04N19/86 ,  H04N19/14 ,  H04N19/61 ,  H04N19/80

Abstract: A method for efficient removal of blocking artifacts in blocks of pixels forming a video image frame, without blurring image edges. First a current pixel is checked to determine whether it is a block boundary pixel. If the current pixel is a boundary pixel, then the “1-D central variance” is computed for horizontal, vertical and diagonal directions that cross the block boundary by using three pixels along a line centered at the current pixel. The “least central variance direction” is then determined by finding the direction which has minimal “1-D central variance”. Then, the current pixel is updated by replacing its value with the average value of the three pixels along the “least central variance direction”, to essentially remove undesirable blocking artifacts.

Abstract translation: 一种用于有效地去除形成视频图像帧的像素块中的块伪影而不模糊图像边缘的方法。 首先，检查当前像素以确定其是否是块边界像素。 如果当前像素是边界像素，则通过沿着当前像素的中心线的三个像素来计算横穿块边界的水平，垂直和对角线方向的“1-D中心方差”。 然后通过找到具有最小“1-D中心方差”的方向来确定“最小中心方差方向”。 然后，通过用“最小中心方差方向”的三个像素的平均值替换其值来更新当前像素，以便基本上去除不想要的块伪影。

公开(公告)号：US07199838B2

公开(公告)日：2007-04-03

申请号：US10871729

申请日：2004-06-17

Applicant: Peng Lin ,  Yeong-Taeg Kim

Inventor： Peng Lin ,  Yeong-Taeg Kim

IPC: H04N5/21

CPC classification number: H04N5/144 ,  G06T5/002 ,  G06T5/20 ,  G06T5/50 ,  G06T2207/10016 ,  G06T2207/20182 ,  G06T2207/20192 ,  G06T2207/20216 ,  H04N5/21

Abstract: A video noise reduction system for a set of video frames that computes a first motion signal using a current frame and multiple consecutive previous frames, computes a second motion signal using the current frame and the processed preceding frame; computes the multi-frame temporal average of the current frame and multiple consecutive previous frames; computes the recursive average of the current frame and the processed preceding frame; generates a temporal filtered signal by soft switching between the multi-frame temporal average and the recursive average based on the first motion signal; applies a spatial filter to the current frame to generate a spatial filtered signal; and combines the temporal filtered signal and the spatial filtered signal based on the second motion signal to generate a final noise reduced video output signal.

Abstract translation: 一种用于使用当前帧和多个连续先前帧计算第一运动信号的一组视频帧的视频噪声降低系统，使用当前帧和处理的先前帧计算第二运动信号; 计算当前帧和多个连续的先前帧的多帧时间平均值; 计算当前帧和处理的前一帧的递归平均值; 通过基于第一运动信号的多帧时间平均和递归平均之间的软切换来产生时间滤波信号; 对当前帧应用空间滤波器以产生空间滤波信号; 并且基于所述第二运动信号组合所述时间滤波信号和所述空间滤波信号以生成最终降噪视频输出信号。

公开(公告)号：US20050094889A1

公开(公告)日：2005-05-05

申请号：US10697362

申请日：2003-10-30

Applicant: Peng Lin ,  Yeong-Taeg Kim

Inventor： Peng Lin ,  Yeong-Taeg Kim

IPC: H04N5/21 ,  G06K9/40 ,  G06T5/00

CPC classification number: G06T5/002 ,  G06T5/20 ,  G06T2207/10016 ,  G06T2207/20008 ,  G06T2207/20012 ,  G06T2207/20192

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US07657098B2

公开(公告)日：2010-02-02

申请号：US11121819

申请日：2005-05-02

Applicant: Peng Lin ,  Yeong-Taeg Kim ,  Seong-Joo Lee

Inventor： Peng Lin ,  Yeong-Taeg Kim ,  Seong-Joo Lee

IPC: G06K9/48

CPC classification number: H04N19/86 ,  H04N19/117 ,  H04N19/14 ,  H04N19/17 ,  H04N19/60 ,  H04N19/80

Abstract: 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.

Abstract translation: 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：US07330218B2

公开(公告)日：2008-02-12

申请号：US10934025

申请日：2004-09-02

Applicant: Peng Lin ,  Yeong-Taeg Kim

Inventor： Peng Lin ,  Yeong-Taeg Kim

IPC: H04N5/21 ,  H04N5/14

CPC classification number: H04N5/21 ,  Y10S348/91

Abstract: 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.

Abstract translation: 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

Applicant: Peng Lin ,  Yeong-Taeg Kim

Inventor： Peng Lin ,  Yeong-Taeg Kim

IPC: H04N5/21

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

Abstract: 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.

Abstract translation: 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

Applicant: Peng Lin ,  Yeong-Taeg Kim

Inventor： Peng Lin ,  Yeong-Taeg Kim

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

CPC classification number: H04N9/646

Abstract: 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.

Abstract translation: 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

Applicant: Peng Lin ,  Yeong-Taeg Kim

Inventor： Peng Lin ,  Yeong-Taeg Kim

IPC: G06K9/40 ,  H04N5/00

CPC classification number: G06K9/40 ,  G06T5/002 ,  G06T5/20 ,  G06T2207/10016 ,  G06T2207/20012 ,  G06T2207/20192

Abstract: 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：US07808558B2

公开(公告)日：2010-10-05

申请号：US11799345

申请日：2007-04-30

Applicant: Peng Lin ,  Yeong-Taeg Kim

Inventor： Peng Lin ,  Yeong-Taeg Kim

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

CPC classification number: H04N9/646

Abstract: 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.

Abstract translation: 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。