Noise-reduction method and apparatus

    公开(公告)号:US09014503B2

    公开(公告)日:2015-04-21

    申请号:US12000013

    申请日:2007-12-06

    IPC分类号: G06K9/40 G06T5/00

    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.

    Noise-reduction method and apparatus
    2.
    发明申请
    Noise-reduction method and apparatus 有权
    降噪方法和装置

    公开(公告)号:US20090074318A1

    公开(公告)日:2009-03-19

    申请号:US12000013

    申请日:2007-12-06

    IPC分类号: G06K9/40

    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。

    Apparatus and method for removing motion blur of image
    3.
    发明申请
    Apparatus and method for removing motion blur of image 有权
    用于去除图像运动模糊的装置和方法

    公开(公告)号:US20080253676A1

    公开(公告)日:2008-10-16

    申请号:US11980377

    申请日:2007-10-31

    IPC分类号: G06K9/40

    摘要: An apparatus for removing motion blur of an image is disclosed. The apparatus includes a motion-blur-function-estimation unit that estimates the motion-blur function of an input image, an image-restoration unit that restores the input image using the estimated motion-blur function, a cost-calculation unit that calculates the blur cost of the restored image, and a control unit that determines the re-estimation of the motion-blur function depending on the calculated blur cost.

    摘要翻译: 公开了一种用于去除图像的运动模糊的装置。 该装置包括:运动模糊功能估计单元,其估计输入图像的运动模糊功能,使用所估计的运动模糊功能恢复输入图像的图像恢复单元;计算单元, 恢复图像的模糊成本,以及控制单元,其根据计算的模糊成本确定运动模糊功能的重新估计。

    Apparatus and method of obtaining image and apparatus and method of processing image
    5.
    发明授权
    Apparatus and method of obtaining image and apparatus and method of processing image 有权
    获取图像的设备和方法及其处理图像的方法

    公开(公告)号:US08169491B2

    公开(公告)日:2012-05-01

    申请号:US12213199

    申请日:2008-06-16

    摘要: Provided are an apparatus and method of obtaining a high-quality image by efficiently processing an image obtained at low-light levels. The image obtaining apparatus comprises a sensor which detects a pixel array value by using a color filter including color pixels for obtaining a color image and a reference pixel for obtaining a reference image used for hand-trembling function estimation; an exposure controller which controls exposure times of the color pixels and the reference pixel; and an image generator which generates a long-exposure color image signal and a short-exposure reference image signal from the detected pixel array value, the long-exposure color image signal and the short-exposure reference image signal being aligned with each other. Accordingly, accurate estimation of the hand-trembling function is possible, thereby enabling the high-quality color image restoration.

    摘要翻译: 提供了一种通过有效地处理在低光水平下获得的图像来获得高质量图像的装置和方法。 图像获取装置包括:传感器,其通过使用包括用于获得彩色图像的彩色像素的滤色器和用于获得用于手抖动功能估计的参考图像的参考像素来检测像素阵列值; 控制彩色像素和参考像素的曝光时间的曝光控制器; 以及图像生成器,其根据所检测的像素阵列值,长曝光彩色图像信号和短曝光参考图像信号彼此对准生成长曝光彩色图像信号和短曝光参考图像信号。 因此,可以准确地估计手抖动功能,从而能够进行高质量的彩色图像恢复。

    Apparatus and method of obtaining image and apparatus and method of processing image
    6.
    发明申请
    Apparatus and method of obtaining image and apparatus and method of processing image 有权
    获取图像的设备和方法及其处理图像的方法

    公开(公告)号:US20090185041A1

    公开(公告)日:2009-07-23

    申请号:US12213199

    申请日:2008-06-16

    IPC分类号: H04N5/228

    摘要: Provided are an apparatus and method of obtaining a high-quality image by efficiently processing an image obtained at low-light levels. The image obtaining apparatus comprises a sensor which detects a pixel array value by using a color filter including color pixels for obtaining a color image and a reference pixel for obtaining a reference image used for hand-trembling function estimation; an exposure controller which controls exposure times of the color pixels and the reference pixel; and an image generator which generates a long-exposure color image signal and a short-exposure reference image signal from the detected pixel array value, the long-exposure color image signal and the short-exposure reference image signal being aligned with each other. Accordingly, accurate estimation of the hand-trembling function is possible, thereby enabling the high-quality color image restoration.

    摘要翻译: 提供了一种通过有效地处理在低光水平下获得的图像来获得高质量图像的装置和方法。 图像获取装置包括:传感器,其通过使用包括用于获得彩色图像的彩色像素的滤色器和用于获得用于手抖动功能估计的参考图像的参考像素来检测像素阵列值; 控制彩色像素和参考像素的曝光时间的曝光控制器; 以及图像生成器,其根据所检测的像素阵列值,长曝光彩色图像信号和短曝光参考图像信号彼此对准生成长曝光彩色图像信号和短曝光参考图像信号。 因此,可以准确地估计手抖动功能,从而能够进行高质量的彩色图像恢复。

    Image processing apparatus and method of noise reduction
    7.
    发明授权
    Image processing apparatus and method of noise reduction 有权
    降噪图像处理装置及方法

    公开(公告)号:US08614746B2

    公开(公告)日:2013-12-24

    申请号:US12563904

    申请日:2009-09-21

    IPC分类号: H04N5/33

    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。

    Method and apparatus for estimating noise determination criteria in an image sensor
    8.
    发明授权
    Method and apparatus for estimating noise determination criteria in an image sensor 有权
    用于估计图像传感器中的噪声确定标准的方法和装置

    公开(公告)号:US07734060B2

    公开(公告)日:2010-06-08

    申请号:US11641865

    申请日:2006-12-20

    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。

    Noise reduction method, medium, and system
    9.
    发明申请
    Noise reduction method, medium, and system 有权
    降噪方法,中等和系统

    公开(公告)号:US20070296871A1

    公开(公告)日:2007-12-27

    申请号:US11806838

    申请日:2007-06-04

    IPC分类号: H04N5/14

    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。

    Apparatus and method for reducing noise of image sensor
    10.
    发明授权
    Apparatus and method for reducing noise of image sensor 有权
    降低图像传感器噪声的装置和方法

    公开(公告)号:US07813583B2

    公开(公告)日:2010-10-12

    申请号:US11640259

    申请日:2006-12-18

    IPC分类号: G06K9/40

    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。