公开(公告)号：US07180480B2

公开(公告)日：2007-02-20

申请号：US10724238

申请日：2003-12-01

申请人： Ho-nam Lee ,  Koich Sono ,  Bong-hwan Cho ,  Tae-young Lee

发明人： Ho-nam Lee ,  Koich Sono ,  Bong-hwan Cho ,  Tae-young Lee

IPC分类号： G09G3/28

CPC分类号： G09G3/2029 ,  G09G3/204 ,  G09G3/2059 ,  G09G2320/0266 ,  H04N5/21 ,  H04N5/70

摘要： A method and apparatus for removing false contours in a pulse number modulation (PNM) digital display device having a plasma display panel (PDP). The method involves a) comparing the input data with the comparison data and calculating a plurality of possible output data in consideration of an index error between the input data and error-diffused input data so that the false contours can be removed, the error-diffused input data being obtained by diffusing a quantization error that has occurred in pixels adjacent to the input data in the current frame; b) detecting an index error between the input data and the error-diffused input data; and c) selecting one from among the plurality of possible output data obtained in step a) in consideration of the index error detected in step b).

摘要翻译： 一种用于消除具有等离子体显示面板（PDP）的脉冲数调制（PNM）数字显示装置中的假轮廓的方法和装置。 该方法包括：a）将输入数据与比较数据进行比较，并考虑到输入数据与误差扩散输入数据之间的索引误差，计算多个可能的输出数据，从而可以消除错误轮廓，误差扩散 通过在与当前帧中的与输入数据相邻的像素中发生的量化误差的扩散获得输入数据; b）检测输入数据和误差扩散输入数据之间的索引误差; 以及c）考虑到步骤b）中检测到的指标误差，从步骤a）中获得的多个可能的输出数据中选择一个。

公开(公告)号：US20050041154A1

公开(公告)日：2005-02-24

申请号：US10891481

申请日：2004-07-15

申请人： Sang-soo Lee ,  Ho-nam Lee

发明人： Sang-soo Lee ,  Ho-nam Lee

IPC分类号： H04N5/21 ,  H04N5/213

CPC分类号： H04N5/21

摘要： An apparatus for and a method of adaptively processing video signals based on noise states. The method includes, a memory device that stores a look-up table in which optimal filter tap coefficients corresponding to a number of noise levels are registered; a noise measurement unit that obtains a noise measurement from input video signals during a predetermined period; a filter coefficient determination unit that selects optimal filter tap coefficients from the memory based on the noise measurement obtained by the noise measurement unit; a noise suppression filter that employs the optimal filter tap coefficients selected by the filter coefficient determination unit to filter and remove noise from the input video signals; and a video signal processor that performs video signal processing on the result output by the noise suppression filter.

摘要翻译： 一种基于噪声状态自适应地处理视频信号的装置和方法。 该方法包括：存储装置，存储查找表，其中登记与多个噪声电平对应的最佳滤波器抽头系数; 噪声测量单元，其在预定时段期间从输入视频信号获得噪声测量; 滤波器系数确定单元，基于由噪声测量单元获得的噪声测量值从存储器中选择最佳滤波器抽头系数; 噪声抑制滤波器，其使用由滤波器系数确定单元选择的最佳滤波器抽头系数来滤波和去除输入视频信号中的噪声; 以及对由噪声抑制滤波器输出的结果执行视频信号处理的视频信号处理器。

公开(公告)号：US07280160B2

公开(公告)日：2007-10-09

申请号：US10891481

申请日：2004-07-15

申请人： Sang-soo Lee ,  Ho-nam Lee

发明人： Sang-soo Lee ,  Ho-nam Lee

IPC分类号： H04N5/21

CPC分类号： H04N5/21

摘要： An apparatus for and a method of adaptively processing video signals based on noise states. The method includes, a memory device that stores a look-up table in which optimal filter tap coefficients corresponding to a number of noise levels are registered; a noise measurement unit that obtains a noise measurement from input video signals during a predetermined period; a filter coefficient determination unit that selects optimal filter tap coefficients from the memory based on the noise measurement obtained by the noise measurement unit; a noise suppression filter that employs the optimal filter tap coefficients selected by the filter coefficient determination unit to filter and remove noise from the input video signals; and a video signal processor that performs video signal processing on the result output by the noise suppression filter.

摘要翻译： 一种基于噪声状态自适应地处理视频信号的装置和方法。 该方法包括：存储装置，存储查找表，其中登记与多个噪声电平对应的最佳滤波器抽头系数; 噪声测量单元，其在预定时段期间从输入视频信号获得噪声测量; 滤波器系数确定单元，基于由噪声测量单元获得的噪声测量值从存储器中选择最佳滤波器抽头系数; 噪声抑制滤波器，其使用由滤波器系数确定单元选择的最佳滤波器抽头系数来滤波和去除输入视频信号中的噪声; 以及对由噪声抑制滤波器输出的结果执行视频信号处理的视频信号处理器。

公开(公告)号：US20050031200A1

公开(公告)日：2005-02-10

申请号：US10830400

申请日：2004-04-23

申请人： Sang-soo Lee ,  Ho-nam Lee

发明人： Sang-soo Lee ,  Ho-nam Lee

IPC分类号： H04N5/57 ,  G06K9/00 ,  G06T5/40

CPC分类号： G06T5/40 ,  G06T5/009

摘要： A black and white stretching system and method for improving contrast of a picture is disclosed. The system includes a histogram distribution calculation unit for calculating a histogram distribution of an input signal of a specified unit, a mean calculation unit for calculating a mean level of the input image signal, a slope calculation unit for calculating black and white stretching slopes in association with the mean level, a ratio calculation unit for calculating a ratio of a picture change based on the histogram distribution of the present input image signal and the previous input image signal, a filtering unit for adjusting the black and white stretching slopes corresponding to the ratio of the picture change, and a stretching unit for stretching the input image signal by mapping the adjusted black and white stretching slopes and the input image signal.

摘要翻译： 公开了一种用于改善图像对比度的黑白拉伸系统和方法。 该系统包括用于计算指定单位的输入信号的直方图分布的直方图分布计算单元，用于计算输入图像信号的平均电平的平均计算单元，用于计算关联的黑白延伸斜率的斜率计算单元 平均等级，用于计算基于当前输入图像信号和先前输入图像信号的直方图分布的图像变化率的比率计算单元，用于调整与比率相对应的黑色和白色拉伸斜率的滤波单元 以及拉伸单元，用于通过映射所调整的黑白延伸斜率和输入图像信号来拉伸输入图像信号。

公开(公告)号：US20090153591A1

公开(公告)日：2009-06-18

申请号：US12181606

申请日：2008-07-29

申请人： Ho-chul SHIN ,  Sang-su LEE ,  Ho-nam Lee ,  Dale YIM ,  Shin-haeng KIM ,  Hak-hun CHOI

发明人： Ho-chul SHIN ,  Sang-su LEE ,  Ho-nam Lee ,  Dale YIM ,  Shin-haeng KIM ,  Hak-hun CHOI

IPC分类号： G09G5/10

CPC分类号： G09G5/10 ,  G09G3/3406 ,  G09G2320/0626 ,  G09G2320/066 ,  G09G2320/0686 ,  G09G2360/16

摘要： A control method of a display apparatus having a display panel formed with a plurality of pixels is provided. The method includes: detecting high gray level pixels having gray scale values greater than a predetermined high gray scale value; detecting a highlight zone including the detected high gray level pixels, wherein a gray scale value difference between boundary pixels of the highlight zone and adjacent pixels is greater than a predetermined reference difference; and applying a gray scale value greater than a gray scale value of the high gray level pixels to a surrounding zone adjacent to the highlight zone.

摘要翻译： 提供了具有形成有多个像素的显示面板的显示装置的控制方法。 该方法包括：检测具有大于预定高灰度值的灰度值的高灰度级像素; 检测包括检测到的高灰度级像素的高光区域，其中高亮区域和相邻像素的边界像素之间的灰度值差异大于预定的参考差值; 以及将高灰度级像素的灰度值的灰度值应用于与所述高亮区域相邻的周围区域。

公开(公告)号：US07292734B2

公开(公告)日：2007-11-06

申请号：US10830400

申请日：2004-04-23

申请人： Sang-soo Lee ,  Ho-nam Lee

发明人： Sang-soo Lee ,  Ho-nam Lee

IPC分类号： G06K9/40

CPC分类号： G06T5/40 ,  G06T5/009

摘要： A black and white stretching system and method for improving contrast of a picture is disclosed. The system includes a histogram distribution calculation unit for calculating a histogram distribution of an input signal of a specified unit, a mean calculation unit for calculating a mean level of the input image signal, a slope calculation unit for calculating black and white stretching slopes in association with the mean level, a ratio calculation unit for calculating a ratio of a picture change based on the histogram distribution of the present input image signal and the previous input image signal, a filtering unit for adjusting the black and white stretching slopes corresponding to the ratio of the picture change, and a stretching unit for stretching the input image signal by mapping the adjusted black and white stretching slopes and the input image signal.

摘要翻译： 公开了一种用于改善图像对比度的黑白拉伸系统和方法。 该系统包括用于计算指定单位的输入信号的直方图分布的直方图分布计算单元，用于计算输入图像信号的平均电平的平均计算单元，用于计算关联的黑白延伸斜率的斜率计算单元 平均等级，用于计算基于当前输入图像信号和先前输入图像信号的直方图分布的图像变化率的比率计算单元，用于调整与比率相对应的黑色和白色拉伸斜率的滤波单元 以及拉伸单元，用于通过映射所调整的黑白延伸斜率和输入图像信号来拉伸输入图像信号。