公开(公告)号：US20050276506A1

公开(公告)日：2005-12-15

申请号：US11117420

申请日：2005-04-29

Applicant: Young-jin Kwon ,  Seung-joon Yang

Inventor： Young-jin Kwon ,  Seung-joon Yang

IPC: G06T5/20 ,  G06K9/00 ,  G06K9/40 ,  G06T5/00 ,  H04N5/14 ,  H04N5/205 ,  H04N5/21 ,  H04N5/44 ,  H04N7/01

CPC classification number: H04N5/21 ,  G06T5/002 ,  G06T5/20 ,  G06T2207/20012 ,  H04N7/012

Abstract: In an apparatus and a method to remove jagging artifacts, a calculating unit defines a window of a predetermined size based on a current pixel in an input current frame or field, and calculates at least one eigen value and at least one eigen vector to determine a feature of the window. A weight determining unit determines the feature of the window based on the calculated eigen value and then determines a filtering weight to be applied to filtering based on the determined feature. A low pass filter filters the window based on the calculated eigen vector and the determined filtering weight. Accordingly, it is possible to remove jagging artifacts occurring in a region, such as an edge, upon image conversion.

Abstract translation: 在一种去除锯齿状伪影的装置和方法中，计算单元基于输入当前帧或场中的当前像素定义预定大小的窗口，并且计算至少一个本征值和至少一个特征矢量以确定 窗口的特征 权重确定单元基于所计算的本征值来确定窗口的特征，然后基于所确定的特征来确定要应用于过滤的过滤权重。 低通滤波器基于计算的特征向量和确定的滤波权重来过滤窗口。 因此，可以在图像转换时去除出现在诸如边缘的区域中的锯齿状伪影。

公开(公告)号：US07443448B2

公开(公告)日：2008-10-28

申请号：US10964712

申请日：2004-10-15

Applicant: Seung-joon Yang ,  Young-jin Kwon

Inventor： Seung-joon Yang ,  Young-jin Kwon

IPC: H04N5/21 ,  H04N7/01

CPC classification number: H04N5/21 ,  H04N7/0112 ,  H04N7/012

Abstract: An apparatus to suppress artifacts in an image signal. The apparatus includes a differential value calculation unit to calculate a differential value between adjacent pixels with respect to an input image signal, a diffusion amount calculation unit to calculate an amount of diffusion between the adjacent pixels on the basis of the differential value calculated by the differential value calculation unit, and a pixel value conversion unit to convert the present pixel value of the image signal inputted on the basis of the diffusion amount between the pixels calculated by the diffusion amount calculation unit. The apparatus changes the pixel value in consideration of the differential value between the adjacent pixels, and thus it can provide a high quality image signal without losing or misrecognizing the artifacts of the image signal.

Abstract translation: 一种抑制图像信号中伪像的装置。 该装置包括差分值计算单元，用于计算相对于输入图像信号的相邻像素之间的差分值，扩散量计算单元，基于由差分计算出的微分值来计算相邻像素之间的扩散量 值计算单元和像素值转换单元，用于转换基于由扩散量计算单元计算的像素之间的扩散量输入的图像信号的当前像素值。 该装置考虑到相邻像素之间的差分值来改变像素值，因此它可以提供高质量的图像信号，而不会丢失或错误地识别图像信号的伪影。

公开(公告)号：US20050111055A1

公开(公告)日：2005-05-26

申请号：US10986291

申请日：2004-11-12

Applicant: Seung-joon Yang ,  Young-jin Kwon

Inventor： Seung-joon Yang ,  Young-jin Kwon

IPC: G06T5/00 ,  G06T5/20 ,  H04N5/208 ,  H04N1/40 ,  G06K15/00

CPC classification number: H04N5/208 ,  G06T5/003 ,  G06T5/20 ,  G06T2207/20012 ,  G06T2207/20192

Abstract: An apparatus and method of image sharpness enhancement. The apparatus includes a slope value calculator to set in an input video signal a window of a predetermined size with reference to a current pixel, and to calculate a slope value based on pixel values within the window, a gain calculator to calculate a gain corresponding to the magnitude of the slope value, a differential value calculator to calculate a differential value which is a difference between pixel values of the current pixel and other pixels within the window, a diffusivity calculator to calculate the diffusivity between the pixels corresponding to the magnitude of the differential value, a diffusivity summer to assign a predetermined weight to the diffusivities between the pixels and to calculate the sum of the diffusivities; and a pixel value converter to multiply the sum of the diffusivities by the gain and to add the multiplied result to the current pixel value. Accordingly, by adaptively applying the weighted diffusivity to the video signal, the image sharpness enhancement is achieved while the visibly objectionable image and the signal distortion are prevented.

Abstract translation: 图像锐度增强的装置和方法。 该装置包括：斜率值计算器，用于参考当前像素将输入视频信号设置为预定尺寸的窗口，并且基于窗口内的像素值计算斜率值;增益计算器，用于计算对应于 斜率值的大小，用于计算作为当前像素的像素值与窗口内的其他像素之间的差的差分值的差分值计算器，用于计算与所述窗口的幅度对应的像素之间的扩散率的扩散计算器 差分值，扩散度夏季，以对像素之间的扩散率分配预定的权重，并计算扩散率的总和; 以及像素值转换器，用于将扩散的和乘以增益，并将乘法结果与当前像素值相加。 因此，通过将视频信号的加权扩散度自适应地应用，在可见的令人反感的图像和信号失真被防止的同时实现图像清晰度增强。

公开(公告)号：US20050219408A1

公开(公告)日：2005-10-06

申请号：US10964712

申请日：2004-10-15

Applicant: Seung-joon Yang ,  Young-jin Kwon

Inventor： Seung-joon Yang ,  Young-jin Kwon

IPC: H04N5/253 ,  H04N5/21 ,  H04N5/44 ,  H04N7/01

CPC classification number: H04N5/21 ,  H04N7/0112 ,  H04N7/012

Abstract: An apparatus to suppress artifacts in an image signal. The apparatus includes a differential value calculation unit to calculate a differential value between adjacent pixels with respect to an input image signal, a diffusion amount calculation unit to calculate an amount of diffusion between the adjacent pixels on the basis of the differential value calculated by the differential value calculation unit, and a pixel value conversion unit to convert the present pixel value of the image signal inputted on the basis of the diffusion amount between the pixels calculated by the diffusion amount calculation unit. The apparatus changes the pixel value in consideration of the differential value between the adjacent pixels, and thus it can provide a high quality image signal without losing or misrecognizing the artifacts of the image signal.

Abstract translation: 一种抑制图像信号中伪像的装置。 该装置包括差分值计算单元，用于计算相对于输入图像信号的相邻像素之间的差分值，扩散量计算单元，基于由差分计算出的微分值来计算相邻像素之间的扩散量 值计算单元和像素值转换单元，用于转换基于由扩散量计算单元计算的像素之间的扩散量输入的图像信号的当前像素值。 该装置考虑到相邻像素之间的差分值来改变像素值，因此它可以提供高质量的图像信号，而不会丢失或错误地识别图像信号的伪影。

公开(公告)号：US08218896B2

公开(公告)日：2012-07-10

申请号：US12293899

申请日：2006-10-02

Applicant: Bo-gun Park ,  Mi-yeon Lee ,  Seung-joon Yang

Inventor： Bo-gun Park ,  Mi-yeon Lee ,  Seung-joon Yang

IPC: G06K9/40

CPC classification number: H04N9/646 ,  H04N19/117 ,  H04N19/139 ,  H04N19/14 ,  H04N19/176 ,  H04N19/186 ,  H04N19/44 ,  H04N19/48 ,  H04N19/61 ,  H04N19/80 ,  H04N19/85

Abstract: An image display apparatus and a color distortion compensation method are provided. The image display apparatus includes a detecting part which detects whether there is a color distortion in a block, using decoding information acquired from an incoming image and a pixel value of the incoming image, and a compensation part which compensates for the color distortion of the block when it is determined that the color distortion exists. Accordingly, it is possible to detect a color distortion in the block using the decoding information and pixel value acquired from the incoming image, and compensate for the color distortion of the block by performing pixel value adjustment and low pass filtering (LPF) when it is determined that the color distortion exists.

Abstract translation: 提供了图像显示装置和颜色失真补偿方法。 图像显示装置包括检测部分，使用从输入图像获取的解码信息和输入图像的像素值来检测块中是否存在颜色失真;以及补偿部，其补偿块的颜色失真 当确定存在颜色失真时。 因此，可以使用从输入图像获取的解码信息和像素值来检测块中的颜色失真，并且通过执行像素值调整和低通滤波（LPF）来补偿块的颜色失真 确定存在颜色失真。

公开(公告)号：US07359573B2

公开(公告)日：2008-04-15

申请号：US10699658

申请日：2003-11-04

Applicant: Yung-jun Park ,  Jae-hwan Oh ,  Hyun Kang ,  Seung-joon Yang

Inventor： Yung-jun Park ,  Jae-hwan Oh ,  Hyun Kang ,  Seung-joon Yang

IPC: G06K9/40 ,  G06K9/00 ,  G09G5/00

CPC classification number: G06T5/009 ,  G06T5/40

Abstract: A contrast compensation apparatus and a method thereof utilize a simplified hardware structure and a low contrast distortion. The contrast compensation apparatus includes a pixel value detection unit to detect a distribution of pixel values of respective pixels of an input image signal, a pixel value limit unit having pre-set luminance limit values and re-configuring the distribution of the pixel values of the respective pixels based on the pre-set luminance limit values, and a mapping unit to set luminance for the respective pixels based on a cumulative distribution function with respect to the re-configured pixel values. When certain portions of an image are rendered very bright or dark, the phenomenon in which the entire image becomes abruptly bright or dark is reduced. Further, the contrast compensation apparatus uses the minimum number of multipliers, adders, and subtractors only, thus having an advantage of simplified structure and using less electric power.

Abstract translation: 对比度补偿装置及其方法利用简化的硬件结构和低对比度失真。 对比度补偿装置包括：像素值检测单元，用于检测输入图像信号的各个像素的像素值的分布，具有预设亮度极限值的像素值限制单元，以及重新配置像素值的像素值的分布; 基于预设亮度极限值的各个像素，以及基于相对于重新配置的像素值的累积分布函数来设置各个像素的亮度的映射单元。 当图像的某些部分变得非常亮或暗时，整个图像变得突然亮或暗的现象减少。 此外，对比度补偿装置仅使用最小数量的乘法器，加法器和减法器，因此具有简化结构和使用较少电功率的优点。

公开(公告)号：US07212246B2

公开(公告)日：2007-05-01

申请号：US10714605

申请日：2003-11-18

Applicant: You-young Jung ,  Young-ho Lee ,  Seung-joon Yang

Inventor： You-young Jung ,  Young-ho Lee ,  Seung-joon Yang

IPC: H04N7/01

CPC classification number: H04N7/012 ,  H04N7/0112

Abstract: An image signal format detection apparatus and method. The image signal format detection apparatus includes a first summed absolute difference (SAD) value calculation unit for calculating, from a previous field, a current field, and a next field of a time-consecutive image signal, a first SAD value with reference to pixel values of the current field and the previous field. A second SAD value calculation unit calculates a second SAD value with reference to pixel values of the current field and the next field. A pattern generation unit generates a detection pattern based on a result of a comparison of the first and second SAD values,; and a pattern analysis unit stores the detection pattern by field, compares the stored detection pattern of a series of fields with a predetermined verification pattern, and determines whether the image signal is an image signal produced in 2:2 pull-down. The apparatus detects an image signal produced in 2:2 pull-down by using the SAD values between fields, and can be applied to a deinterlacing device or the like.

Abstract translation: 一种图像信号格式检测装置及方法。 图像信号格式检测装置包括：第一相加绝对差值（SAD）值计算单元，用于从先前场计算时间连续图像信号的当前场和下一场，参考像素的第一SAD值 当前字段和前一个字段的值。 第二SAD值计算单元参照当前场和下一场的像素值来计算第二SAD值。 图案生成单元基于第一SAD值和第二SAD值的比较结果生成检测图案; 图案分析单元逐场存储检测图案，将存储的一系列场的检测图案与预定的验证图案进行比较，并且确定图像信号是否是以2：2下拉产生的图像信号。 该装置通过使用场之间的SAD值来检测在2：2下拉中产生的图像信号，并且可以应用于去隔行扫描装置等。

公开(公告)号：US07042512B2

公开(公告)日：2006-05-09

申请号：US10074259

申请日：2002-02-14

Applicant: Seung-joon Yang ,  Sung-hee Lee

Inventor： Seung-joon Yang ,  Sung-hee Lee

IPC: H04N7/01

CPC classification number: H04N7/012 ,  H04N5/145

Abstract: An apparatus for and a method of adaptive motion compensated de-interlacing of video data, in which one of a spatio-temporal method and a motion compensation method is adaptively selected according to a motion type. Motion vectors of a video field to be interpolated and an accuracy of the motion vectors are estimated using adjacent fields. An existence or non-existence of global motion is determined by analyzing the estimated motion vectors. Pixels generated according to a spatio-temporal interpolation method or pixels generated according to a motion compensated interpolation method are selected based on the accuracy of the estimated motion vectors and the existence or non-existence of global motion.

公开(公告)号：US20060044476A1

公开(公告)日：2006-03-02

申请号：US11210823

申请日：2005-08-25

Applicant: Young-ho Lee ,  Seung-joon Yang

Inventor： Young-ho Lee ,  Seung-joon Yang

IPC: H04N7/01

CPC classification number: H04N7/0115

Abstract: A film mode detection apparatus and a method thereof can determine whether an input image is a film image by detecting existence/nonexistence of a caption in an input image field and using information of the remaining area of a field except for a caption area. The apparatus includes a caption detection unit to detect minimum values of difference values of information between successive fields from a field area including a caption area and a remaining field area excluding the caption area in an input image, respectively, and to judge whether a caption exists in a present field according to variances of the detected minimum values, a pattern generation unit to generate a pattern of a certain area of the field using the difference values of the information between the successive fields according to whether the caption exists, and a decision unit to determine whether the input image is a film image using the generated pattern. Accordingly, deterioration of picture quality due to frequency on/off operation of a film mode caused by an error of film mode judgment can be prevented.

Abstract translation: 电影模式检测装置及其方法可以通过检测输入图像字段中的字幕的存在/不存在以及使用除字幕区域之外的场的剩余区域的信息来确定输入图像是否为胶片图像。 该装置包括：字幕检测单元，用于分别检测来自包括字幕区域和除输入图像中的字幕区域之外的剩余字段区域的连续字段之间的信息的差值的最小值，并判断是否存在字幕 根据检测到的最小值的方差在当前场中，使用根据是否存在字幕的连续字段之间的信息的差值来生成场的某个区域的模式的模式生成单元和判定单元 以确定输入图像是否是使用所生成的图案的胶片图像。 因此，可以防止由于胶片模式判断的误差引起的胶片模式的频率开/关操作导致的图像质量的劣化。

公开(公告)号：US08131109B2

公开(公告)日：2012-03-06

申请号：US11760852

申请日：2007-06-11

Applicant: Sung-hee Kim ,  Seung-joon Yang ,  Rae-hong Park ,  Bo-ra Lim

Inventor： Sung-hee Kim ,  Seung-joon Yang ,  Rae-hong Park ,  Bo-ra Lim

IPC: G06K9/36

CPC classification number: G06T5/50 ,  G06T5/009 ,  G06T5/40 ,  G06T2207/20021

Abstract: Provided are an image processing method and apparatus for enhancing contrast. The image processing apparatus includes a determination unit that determines whether contrast enhancement processing should be performed on an input image; an intensity mapping unit that generates a plurality of images having different exposure times from the input image, using intensity mapping, if the contrast enhancement processing should be performed on the input image; and an image composition unit that composes the plurality of images into a composed image. Therefore, it is possible to reduce a color change or a false contour phenomenon that are generated in a related art contrast enhancement process.

Abstract translation: 提供了一种用于增强对比度的图像处理方法和装置。 图像处理装置包括确定单元，其确定是否应当对输入图像执行对比度增强处理; 强度映射单元，如果对输入图像执行对比度增强处理，则使用强度映射来生成具有与输入图像不同的曝光时间的多个图像; 以及将多个图像组成合成图像的图像合成单元。 因此，可以减少在相关技术的对比度增强处理中产生的颜色变化或假轮廓现象。