公开(公告)号：US20070200958A1

公开(公告)日：2007-08-30

申请号：US11799345

申请日：2007-04-30

Applicant: Peng Lin ,  Yeong-Taeg Kim

Inventor： Peng Lin ,  Yeong-Taeg Kim

IPC: H04N5/21

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.

公开(公告)号：US07260272B2

公开(公告)日：2007-08-21

申请号：US10617064

申请日：2003-07-10

Applicant: Peng Lin ,  Yeong-Taeg Kim

Inventor： Peng Lin ,  Yeong-Taeg Kim

IPC: G06K9/40

CPC classification number: G06K9/40 ,  G06T5/002 ,  G06T5/10 ,  G06T2207/10016 ,  G06T2207/20064

Abstract: 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.

Abstract translation: 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：US20060245506A1

公开(公告)日：2006-11-02

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: H04B1/66

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：US20080002902A1

公开(公告)日：2008-01-03

申请号：US11853655

申请日：2007-09-11

Applicant: Peng Lin ,  Yeong-Taeg Kim

Inventor： Peng Lin ,  Yeong-Taeg Kim

IPC: G06K9/40

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：US20060044475A1

公开(公告)日：2006-03-02

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

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：US20050280739A1

公开(公告)日：2005-12-22

申请号：US10871729

申请日：2004-06-17

Applicant: Peng Lin ,  Yeong-Taeg Kim

Inventor： Peng Lin ,  Yeong-Taeg Kim

IPC: G06T5/00 ,  H04N5/14 ,  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：US07522220B2

公开(公告)日：2009-04-21

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 ,  H04N5/21

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.

Abstract translation: 一种降噪系统，不仅可以保留图像中的细节，还可以在图像中提供基本上干净，平滑和自然的均匀区域。 降噪系统采用双通道自适应降噪技术。 首先通过信道分离滤波器将输入信号分成两个信道（即，低通信道和高通信道）。 然后分别处理两个通道信号。 基于本地2D和1D统计量的估计和局部图像结构方向的检测，使用自适应方向滤波器处理低通信道信号。 基于从原始输入信号的噪声电平导出的高通道信号的局部统计量和噪声电平的估计，通过非线性滤波方法处理高通道信号。 来自两个通道的经处理的信号被加在一起以得到最终的输出。

公开(公告)号：US07317842B2

公开(公告)日：2008-01-08

申请号：US10697362

申请日：2003-10-30

Applicant: Peng Lin ,  Yeong-Taeg Kim

Inventor： Peng Lin ,  Yeong-Taeg Kim

IPC: G06K9/40

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：US07218794B2

公开(公告)日：2007-05-15

申请号：US10412030

申请日：2003-04-10

Applicant: Peng Lin ,  Yeong-Taeg Kim

Inventor： Peng Lin ,  Yeong-Taeg Kim

IPC: G06K9/40 ,  H04B1/66

CPC classification number: H04N19/86 ,  H04N5/21 ,  H04N19/865

Abstract: A grid detector detects the existence and the location of grids in DCT compressed videos. When a grid is detected in the input video, a post-processor is turned on and the de-blocking processing is applied on the grid detected by the grid detector. When no grid is detected, indicating that the input video is either an uncompressed video or an already de-blocked video, post-processing turned off to avoid degrading the picture quality. To detect grids, the grid detector: (a) computes horizontal and vertical second derivatives for all pixels of the image; (b) generates horizontal second derivative zero-crossing mask and vertical second derivative zero-crossing mask by marking the those pixels whose second derivatives have opposite signs with respect to their horizontal or vertical neighboring pixels'; (c) applies horizontal and vertical integral projections to the horizontal and vertical zero-crossing masks respectively; (d) generates the local maximum masks by locating the local maximum of the two projected 1-D signals; and (e) determines grid location by computing the positions of the local maximum masks.

Abstract translation: 电网检测器检测DCT压缩视频中网格的存在和位置。 当在输入视频中检测到网格时，后处理器被打开，并且解块处理被应用于由网格检测器检测到的网格上。 当没有检测到网格时，指示输入视频是未压缩视频或已经解除封锁的视频，后处理关闭以避免图像质量下降。 为了检测网格，网格检测器：（a）为图像的所有像素计算水平和垂直二阶导数; （b）通过标记相对于它们的水平或垂直相邻像素具有相反符号的那些像素来产生水平二次导数过零掩模和垂直二次导数过零掩模; （c）分别对水平和垂直过零面罩施加水平和垂直整体投影; （d）通过定位两个投影的1-D信号的局部最大值来产生局部最大掩模; 和（e）通过计算局部最大掩模的位置来确定网格位置。

公开(公告)号：US20070081596A1

公开(公告)日：2007-04-12

申请号：US11246634

申请日：2005-10-06

Applicant: Peng Lin ,  Yeong-Taeg Kim

Inventor： Peng Lin ,  Yeong-Taeg Kim

IPC: H04B1/66

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。