公开(公告)号：US20090074318A1

公开(公告)日：2009-03-19

申请号：US12000013

申请日：2007-12-06

申请人： Young-jin Yoo ,  Ho-cheon Wey ,  Seong-deok Lee

发明人： Young-jin Yoo ,  Ho-cheon Wey ,  Seong-deok Lee

IPC分类号： G06K9/40

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

摘要： A noise-reduction method and apparatus are provided. The noise-reduction method includes estimating activity levels of regions in an input image; and applying different weights to a large noise filter kernel and a small noise filter kernel according to the estimated activity levels, wherein the estimating includes calculating a noise level of the input image, generating a binary image by calculating signal-to-noise ratios (SNRs) of pixels of the input image and by comparing the SNRs of the pixels of the input image with a predefined threshold, and reducing binary data boundaries in the binary image.

摘要翻译： 提供降噪方法和装置。 噪声降低方法包括估计输入图像中的区域的活动水平; 以及根据估计的活动水平将不同权重应用于大噪声滤波器核和小噪声滤波器核，其中所述估计包括计算输入图像的噪声电平，通过计算信噪比（SNR）来产生二进制图像 ），并且通过将输入图像的像素的SNR与预定义的阈值进行比较，并且减少二进制图像中的二进制数据边界。

公开(公告)号：US09014503B2

公开(公告)日：2015-04-21

申请号：US12000013

申请日：2007-12-06

申请人： Young-jin Yoo ,  Ho-cheon Wey ,  Seong-deok Lee

发明人： Young-jin Yoo ,  Ho-cheon Wey ,  Seong-deok Lee

IPC分类号： G06K9/40 ,  G06T5/00

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

摘要： A noise-reduction method and apparatus are provided. The noise-reduction method includes estimating activity levels of regions in an input image; and applying different weights to a large noise filter kernel and a small noise filter kernel according to the estimated activity levels, wherein the estimating includes calculating a noise level of the input image, generating a binary image by calculating signal-to-noise ratios (SNRs) of pixels of the input image and by comparing the SNRs of the pixels of the input image with a predefined threshold, and reducing binary data boundaries in the binary image.

公开(公告)号：US08467003B2

公开(公告)日：2013-06-18

申请号：US11806838

申请日：2007-06-04

申请人： Young-jin Yoo ,  Seong-deok Lee

发明人： Young-jin Yoo ,  Seong-deok Lee

IPC分类号： H04N5/14

CPC分类号： G06T5/002 ,  G06T5/20 ,  G06T2207/10024 ,  G06T2207/20012 ,  H04N5/217

摘要： A noise reduction method, medium, and system. The noise reduction method includes calculating a noise level of an input image and removing noise from a central pixel within a window of a predetermined size in the input image using a weight determined based on a difference between signal intensities of the central pixel and a plurality of adjacent pixels within the window and the calculated noise level.

摘要翻译： 降噪方法，介质和系统。 噪声降低方法包括：使用基于中心像素的信号强度和多个信号强度之间的差异确定的权重来计算输入图像的噪声电平并从输入图像中的预定大小的窗口内的中心像素去除噪声 窗口内的相邻像素和计算出的噪声水平。

公开(公告)号：US08335395B2

公开(公告)日：2012-12-18

申请号：US11907293

申请日：2007-10-10

申请人： Young-jin Yoo ,  Won-hee Choe ,  Jae-guyn Lim ,  Seong-deok Lee

发明人： Young-jin Yoo ,  Won-hee Choe ,  Jae-guyn Lim ,  Seong-deok Lee

IPC分类号： G06K9/40

CPC分类号： G06K9/40 ,  G06T5/002 ,  G06T5/003 ,  G06T7/13 ,  G06T2207/20012 ,  G06T2207/20192

摘要： Provided are a noise reduction apparatus having an edge enhancement function and a method thereof, in which edges in an input image can be prevented from being blurred when reducing noise in the input image and a clear output image can be obtained by reducing edge discontinuities. The noise reduction apparatus includes a window setting module which sets a portion of an input image as a window, an edge-information detection module which detects edge information regarding the window, an image processing module which performs an image processing operation on the window, and an output-image generation module which generates an output image by reflecting the edge information into one or more windows obtained by the image processing operation.

摘要翻译： 提供了具有边缘增强功能的降噪装置及其方法，其中可以防止输入图像中的边缘在降低输入图像中的噪声时变得模糊，并且可以通过减少边缘不连续性来获得清晰的输出图像。 降噪装置包括将输入图像的一部分设置为窗口的窗口设置模块，检测关于窗口的边缘信息的边缘信息检测模块，对窗口执行图像处理操作的图像处理模块，以及 输出图像生成模块，其通过将边缘信息反映到通过图像处理操作获得的一个或多个窗口中来生成输出图像。

公开(公告)号：US08004586B2

公开(公告)日：2011-08-23

申请号：US11583006

申请日：2006-10-19

申请人： Young-jin Yoo ,  Ho-young Lee ,  Du-sik Park ,  Seong-deok Lee ,  Seung-sin Lee

发明人： Young-jin Yoo ,  Ho-young Lee ,  Du-sik Park ,  Seong-deok Lee ,  Seung-sin Lee

IPC分类号： H04N5/217

CPC分类号： H04N1/409

摘要： An apparatus and a method for reducing noise from an image sensor are provided. The apparatus includes a noise-estimation unit which estimates a noise level representing an image frame expressed as a component in a color space, a filter-strength-calculation unit which determines filter strength based on the estimated noise level, and a filter-application unit which filters pixels constituting the image frame according to the determined filter strength.

摘要翻译： 提供了一种降低图像传感器噪声的装置和方法。 该装置包括噪声估计单元，其估计表示作为颜色空间中的分量的图像帧的噪声水平，基于估计的噪声水平确定滤波器强度的滤波强度计算单元，以及滤波器应用单元 其根据所确定的滤波器强度对构成图像帧的像素进行滤波。

公开(公告)号：US07813583B2

公开(公告)日：2010-10-12

申请号：US11640259

申请日：2006-12-18

申请人： Young-jin Yoo ,  Seong-deok Lee ,  Hyun-wook Ok

发明人： Young-jin Yoo ,  Seong-deok Lee ,  Hyun-wook Ok

IPC分类号： G06K9/40

CPC分类号： G06T5/002 ,  G06T5/20 ,  G06T2207/10024

摘要： An apparatus and method for reducing noise of an image sensor are provided. The apparatus includes a noise level setting module setting a noise level representing an image frame expressed as a component in a color space; a kernel generation module generating a kernel for filtering pixels that constitute the image frame based on the set noise level; and a filter application module convoluting the pixels using the generated kernel and normalizing the pixels using the convolution result. Since noise generated by the image sensor can be adaptively reduced, the quality of an output image can be improved.

摘要翻译： 提供了一种降低图像传感器噪声的装置和方法。 该装置包括设置表示作为颜色空间中的分量的图像帧的噪声电平的噪声电平设置模块; 内核生成模块，其基于所设定的噪声电平生成用于对构成所述图像帧的像素进行滤波的内核; 以及滤波器应用模块，使用所生成的内核卷积像素并使用卷积结果对像素进行归一化。 由于可以自适应地降低由图像传感器产生的噪声，可以提高输出图像的质量。

公开(公告)号：US20080298713A1

公开(公告)日：2008-12-04

申请号：US11907293

申请日：2007-10-10

申请人： Young-jin Yoo ,  Won-hee Choe ,  Jae-guyn Lim ,  Seong-deok Lee

发明人： Young-jin Yoo ,  Won-hee Choe ,  Jae-guyn Lim ,  Seong-deok Lee

IPC分类号： G06K9/40

CPC分类号： G06K9/40 ,  G06T5/002 ,  G06T5/003 ,  G06T7/13 ,  G06T2207/20012 ,  G06T2207/20192

摘要： Provided are a noise reduction apparatus having an edge enhancement function and a method thereof, in which edges in an input image can be prevented from being blurred when reducing noise in the input image and a clear output image can be obtained by reducing edge discontinuities. The noise reduction apparatus includes a window setting module which sets a portion of an input image as a window, an edge-information detection module which detects edge information regarding the window, an image processing module which performs an image processing operation on the window, and an output-image generation module which generates an output image by reflecting the edge information into one or more windows obtained by the image processing operation.

摘要翻译： 提供了具有边缘增强功能的降噪装置及其方法，其中可以防止输入图像中的边缘在降低输入图像中的噪声时变得模糊，并且可以通过减少边缘不连续性来获得清晰的输出图像。 降噪装置包括将输入图像的一部分设置为窗口的窗口设置模块，检测关于窗口的边缘信息的边缘信息检测模块，对窗口执行图像处理操作的图像处理模块，以及 输出图像生成模块，其通过将边缘信息反映到通过图像处理操作获得的一个或多个窗口中来生成输出图像。

公开(公告)号：US08614746B2

公开(公告)日：2013-12-24

申请号：US12563904

申请日：2009-09-21

申请人： Won-hee Choe ,  Young-jin Yoo ,  Seong-deok Lee

发明人： Won-hee Choe ,  Young-jin Yoo ,  Seong-deok Lee

IPC分类号： H04N5/33

CPC分类号： H04N5/357 ,  H04N5/33 ,  H04N5/332 ,  H04N9/045

摘要： An image processing apparatus including an image acquiring unit to acquire a first image including color information and a second image having a spectral band wider than that of the first image and a noise reduction unit to extract edge information from the second image and to reduce noise of the first image based on the extracted edge information.

摘要翻译： 一种图像处理装置，包括：图像获取单元，用于获取包括颜色信息的第一图像和具有比第一图像的频谱宽度更宽的频谱带的第二图像;以及噪声降低单元，用于从第二图像提取边缘信息，并且降低噪声 基于所提取的边缘信息的第一图像。

公开(公告)号：US07734060B2

公开(公告)日：2010-06-08

申请号：US11641865

申请日：2006-12-20

申请人： Young-jin Yoo ,  Seong-deok Lee

发明人： Young-jin Yoo ,  Seong-deok Lee

IPC分类号： G06K9/00 ,  H04N5/228

CPC分类号： G06K9/40 ,  G06K9/4642 ,  H04N5/357

摘要： A method and an apparatus are provided for estimating noise determination criteria in an image sensor. The method includes calculating a color characteristic value for each of a plurality blocks constituting an input image, comparing the color characteristic value of a first block among the blocks with a initial noise criterion, sorting the color characteristic value of the first block as a first group of a color characteristic class and accumulating a result of the comparing into the first group, and modifying the initial noise criterion using a result of the accumulating and calculating a first group noise criterion to be applied to corresponding blocks belonging to the sorted first group of the color characteristic class.

摘要翻译： 提供了一种用于估计图像传感器中的噪声确定标准的方法和装置。 该方法包括：计算构成输入图像的多个块中的每一个的颜色特征值，将块中的第一块的颜色特征值与初始噪声标准进行比较，将第一块的颜色特征值分类为第一组 并且将所述比较结果累积到所述第一组中，并且使用累积和计算要应用于属于所述第一组排序的第一组的对应块的第一组噪声标准的结果来修改所述初始噪声准则 颜色特征类。

公开(公告)号：US20070296871A1

公开(公告)日：2007-12-27

申请号：US11806838

申请日：2007-06-04

申请人： Young-jin Yoo ,  Seong-deok Lee

发明人： Young-jin Yoo ,  Seong-deok Lee

IPC分类号： H04N5/14

CPC分类号： G06T5/002 ,  G06T5/20 ,  G06T2207/10024 ,  G06T2207/20012 ,  H04N5/217

摘要： A noise reduction method, medium, and system. The noise reduction method includes calculating a noise level of an input image and removing noise from a central pixel within a window of a predetermined size in the input image using a weight determined based on a difference between signal intensities of the central pixel and a plurality of adjacent pixels within the window and the calculated noise level.

摘要翻译： 降噪方法，介质和系统。 噪声降低方法包括：使用基于中心像素的信号强度和多个信号强度之间的差异确定的权重来计算输入图像的噪声电平并从输入图像中的预定大小的窗口内的中心像素去除噪声 窗口内的相邻像素和计算出的噪声水平。