公开(公告)号：US07035481B2

公开(公告)日：2006-04-25

申请号：US10237935

申请日：2002-09-10

申请人： Shin-Haeng Kim ,  Yeong-taeg Kim

发明人： Shin-Haeng Kim ,  Yeong-taeg Kim

IPC分类号： G06K9/32 ,  G06K9/36

CPC分类号： H04N7/012 ,  G06T3/403

摘要： An apparatus and method for interpolating lines of input image signal. The apparatus has a detection unit for detecting a directional characteristic and an angle with respect to a horizontal direction of a sampled edge component obtained by sampling the edge component of an upper horizontal line and a lower horizontal line in an area around a pixel to be interpolated; a judgment unit for judging whether an error is generated based on the directional characteristic and the angle detected by the detection unit and an average value of pixels corresponding to the directional characteristic and the angle; and an image signal generation unit for generating a line interpolated image signal by line interpolating an input image signal, according to a result judged by the judgment unit.

公开(公告)号：US08279340B2

公开(公告)日：2012-10-02

申请号：US12388747

申请日：2009-02-19

申请人： Shin-haeng Kim ,  Yeong-taeg Kim

发明人： Shin-haeng Kim ,  Yeong-taeg Kim

IPC分类号： H04N7/01 ,  G06K9/36

CPC分类号： H04N7/0127 ,  H04N7/014

摘要： An image signal processing unit and an image signal processing method thereof. An image signal processing unit estimates motion characteristics of an input image, and adjusts a phase of an interpolation frame according to the motion characteristics when converting a frame rate. Accordingly, linearity can be maintained according to the motion characteristics of an input image, and the frame rate can be converted without generating noise such as halo artifacts.

摘要翻译： 一种图像信号处理单元及其图像信号处理方法。 图像信号处理单元估计输入图像的运动特性，并且当转换帧速率时根据运动特性来调整内插帧的相位。 因此，可以根据输入图像的运动特性来维持线性，并且可以转换帧速率而不产生诸如晕轮假象的噪声。

公开(公告)号：US08289444B2

公开(公告)日：2012-10-16

申请号：US12436650

申请日：2009-05-06

申请人： Zhi Zhou ,  Yeong-taeg Kim

发明人： Zhi Zhou ,  Yeong-taeg Kim

IPC分类号： H04N7/11 ,  H04N11/20

CPC分类号： H04N5/145 ,  H04N7/0127 ,  H04N7/014

摘要： A system and method for video frame interpolation are disclosed. In one embodiment, the method comprises receiving first motion estimation data representing estimated motion of blocks between a first frame and a second frame, receiving second motion estimation data representing estimated motion of blocks between the second frame and a third frame, determining whether an area in an interpolated frame between the first and second frame is an occlusion area based at least in part on the first and second motion estimation data, and estimating characteristics of pixels of the area based in part on the determination.

摘要翻译： 公开了一种用于视频帧插值的系统和方法。 在一个实施例中，该方法包括接收表示在第一帧和第二帧之间的块的估计运动的第一运动估计数据，接收表示在第二帧和第三帧之间的块的估计运动的第二运动估计数据， 第一帧和第二帧之间的内插帧是至少部分地基于第一和第二运动估计数据的遮挡区域，并且部分地基于该确定来估计该区域的像素的特征。

公开(公告)号：US6011430A

公开(公告)日：2000-01-04

申请号：US842831

申请日：1997-04-17

申请人： Yeong-taeg Kim

发明人： Yeong-taeg Kim

IPC分类号： H04N5/21 ,  H04N5/213 ,  H03K5/00

CPC分类号： H04N5/213

摘要： A noise reduction method and circuit determines the presence of an impulse component in a current input sample by generating two windows of different size and detecting the impulse component in the two respective windows in order to prevent degradation of an input image signal due to an erroneous detection. If the impulse component is not detected in the sample, the sample is bypassed. However, if the impulse component is detected, the sample is trimmed by a trimmed mean filter and then output.

摘要翻译： 噪声降低方法和电路通过产生两个不同大小的窗口来确定当前输入样本中的脉冲分量的存在，并检测两个相应窗口中的脉冲分量，以便防止由于错误检测导致的输入图像信号的劣化 。 如果样品中没有检测到脉冲成分，则旁路样品。 然而，如果检测到脉冲分量，则通过修整的平均滤波器对样本进行修整，然后输出。

公开(公告)号：US6018588A

公开(公告)日：2000-01-25

申请号：US947899

申请日：1997-10-09

申请人： Yeong-taeg Kim

发明人： Yeong-taeg Kim

IPC分类号： G06T5/40 ,  H04N1/60 ,  G06K9/00 ,  G06K9/40

CPC分类号： G06T5/40 ,  G06T5/007 ,  H04N1/6027 ,  G06T2207/10024 ,  G06T2207/20021

摘要： In an image enhancement method and circuit, a luminance signal is extracted from input color signals. Histogram equalization is performed using a cumulative density function of the extracted luminance signal which is input in a screen unit. A transform function is controlled to map a mean level of the extracted luminance signal to itself, so that an adjusted luminance signal is output. The color signals are varied according to the variation of the luminance signals to output compensated color signals. Thus, image contrast is enhanced, and an undistorted color signal is provided at the same time. In order to reduce the hardware of the circuit, an interpolated cumulative density function is obtained by interpolating a quantized cumulative density function of an input luminance image and is used as a transform function. The transform function is controlled to map a mean level of the input luminance image to itself.

公开(公告)号：US5937090A

公开(公告)日：1999-08-10

申请号：US914266

申请日：1997-08-19

申请人： Yeong-taeg Kim

发明人： Yeong-taeg Kim

IPC分类号： H04N5/20 ,  G06T5/00 ,  G06T5/40 ,  H04N19/00 ,  H04N19/102 ,  H04N19/136 ,  H04N19/196 ,  H04N19/423 ,  H04N19/426 ,  H04N19/59 ,  G06K9/00

CPC分类号： G06T5/40 ,  G06T5/009 ,  G06T2207/10044 ,  G06T2207/10048 ,  G06T2207/30004

摘要： An image enhancement circuit and a method therefor including the steps of quantizing the level of an input image signal, obtaining a cumulative density function on the basis of a gray level distribution of a screen unit with respect to the quantized image signal, outputting a cumulative density function value interpolated on the basis of the quantized cumulative density function value, calculating the mean level of the input image signal in a screen unit, and controlling a transform function to map the input image signal to a gray level and map the mean level to itself, by using the interpolated cumulative density function as the transform function. In addition, the image enhancement method includes the steps of outputting a compensated mean level by adding a corrected value depending on a predetermined correction function to the mean level, and controlling the interpolated cumulative density function as a transform function to map an input image signal to a new gray level on the basis of the interpolated cumulative density function value and to map the mean level to the compensated mean level. Thus, contrast is enhanced, and the mean brightness of a given image is continuously maintained.

摘要翻译： 一种图像增强电路及其方法，包括以下步骤：量化输入图像信号的电平，基于相对于量化图像信号的屏幕单元的灰度分布获得累积密度函数，输出累积密度 基于量化累积密度函数值内插的函数值，计算屏幕单位中的输入图像信号的平均电平，并且控制变换函数将输入图像信号映射到灰度级并将平均电平映射到其自身 ，通过使用内插的累积密度函数作为变换函数。 此外，图像增强方法包括以下步骤：通过将取决于预定校正函数的校正值与平均电平相加来输出补偿平均电平，并且将插值累加密度函数控制为变换函数，以将输入图像信号映射到 基于内插累积密度函数值的新灰度级，并将平均水平映射到补偿平均水平。 因此，增强了对比度，并且连续地保持给定图像的平均亮度。

公开(公告)号：US5923383A

公开(公告)日：1999-07-13

申请号：US883707

申请日：1997-06-27

申请人： Yeong-taeg Kim

发明人： Yeong-taeg Kim

IPC分类号： G06T5/40 ,  H04N5/20 ,  H04N5/14

CPC分类号： H04N5/20 ,  G06T5/009 ,  G06T5/40

摘要： In an image enhancement method is disclosed using a histogram equalization for an input image expressed in a predetermined number of gray levels. While calculating the probability density function of the gray levels of the input image, for use in a histogram equalization, the number of occurrences of each gray level are constrained not to exceed a predetermined value. Then a histogram equalization is performed on the input image based on the calculated probability density (or distribution) function. As a result, the mean brightness of the input image does not change significantly by the histogram equalization. Additionally, noise is prevented from being greatly amplified.

摘要翻译： 在使用用预定数量的灰度级表示的输入图像的直方图均衡的图像增强方法被公开。 在计算输入图像的灰度级的概率密度函数的同时，为了在直方图均衡中使用，每个灰度级的出现次数被限制为不超过预定值。 然后基于所计算的概率密度（或分布）函数对输入图像执行直方图均衡。 结果，输入图像的平均亮度不会由于直方图均衡而显着变化。 此外，防止噪声被大大放大。

公开(公告)号：US20100232713A1

公开(公告)日：2010-09-16

申请号：US12403182

申请日：2009-03-12

申请人： Zhi Zhou ,  Yeong-taeg Kim

发明人： Zhi Zhou ,  Yeong-taeg Kim

IPC分类号： G06K9/62

CPC分类号： G06K9/3266 ,  G06K2209/01

摘要： A vertical scrolling region detector may include a motion estimator that can generate motion vectors between blocks of two or more primary frames of a mixed-mode video sequence. The detector may also include a primary frame motion analyzer that can analyze the motion vectors to detect substantially constant vertical motion of at least some of the blocks between the two or more primary frames. The presence of substantially constant vertical motion may reflect the presence of a vertical scrolling region in the mixed-mode video sequence. Moreover, the detector may also include a consecutive frame motion analyzer that can calculate differences in pixel values between lines of two or more consecutive frames in the mixed-mode video sequence. The differences in pixel values may further reflect the presence of the vertical scrolling region in the mixed-mode video sequence.

摘要翻译： 垂直滚动区域检测器可以包括运动估计器，其可以在混合模式视频序列的两个或多个主要帧的块之间生成运动矢量。 检测器还可以包括主帧运动分析器，其可以分析运动矢量以检测两个或更多个主帧之间的至少一些块的基本恒定的垂直运动。 基本上恒定的垂直运动的存在可以反映混合模式视频序列中垂直滚动区域的存在。 此外，检测器还可以包括可以计算混合模式视频序列中两个或更多个连续帧的行之间的像素值的差异的连续帧运动分析器。 像素值的差异可进一步反映混合模式视频序列中垂直滚动区域的存在。

公开(公告)号：US6078686A

公开(公告)日：2000-06-20

申请号：US941669

申请日：1997-09-30

申请人： Yeong-taeg Kim

发明人： Yeong-taeg Kim

IPC分类号： H04N5/21 ,  G06T1/00 ,  H04N1/58 ,  H04N5/202 ,  H04N5/66 ,  H04N9/64 ,  H04N9/77 ,  G06K9/00 ,  G06K9/40

CPC分类号： H04N9/68 ,  H04N1/58 ,  H04N9/646

摘要： According to an image quality enhancing circuit and a method therefor, an impulse for each of an input luminance and color signals is detected. A trimmed mean of a predetermined-sized window is output when the impulse is detected. Otherwise, the input signals are bypassed. Accordingly, noise-reduced luminance and color signals are output. An enhanced luminance signal is output by receiving the noise-reduced luminance signal in a picture unit and independently equalizing histograms for subimages divided on the basis of the mean value of the received luminance signal. A local contrast defined as a difference between the value of an input sample with respect to the enhanced luminance signal and each value obtained by low-pass filtering the samples in a predetermined-sized window including the input sample, and the input sample value is adaptively weighted according to the detected local contrast, so that a changed luminance signal is output. A compensated color signal is output by compensating the noise-reduced color signal according to the changed luminance signal. Thus, impulse noise is effectively removed, and an undistorted color signal is provided while enhancing the contrast of the luminance signal, so that the image quality is greatly improved.

摘要翻译： 根据图像质量增强电路及其方法，检测输入亮度和颜色信号中的每一个的脉冲。 当检测到脉冲时，输出预定大小的窗口的修整平均值。 否则，旁路输入信号。 因此，输出噪声降低的亮度和颜色信号。 通过接收图像单元中的降噪亮度信号来输出增强亮度信号，并且独立地均衡基于接收到的亮度信号的平均值划分的子图像的直方图。 定义为输入样本的值相对于增强的亮度信号和通过对包括输入样本的预定大小的窗口中的样本进行低通滤波获得的每个值之间的差的局部对比度和输入的样本值是自适应的 根据检测到的局部对比度加权，从而输出改变的亮度信号。 通过根据改变的亮度信号补偿噪声降低的颜色信号来输出补偿的彩色信号。 因此，有效地消除脉冲噪声，并且在增强亮度信号的对比度的同时提供未失真的彩色信号，从而大大提高图像质量。

公开(公告)号：US08411738B2

公开(公告)日：2013-04-02

申请号：US12403182

申请日：2009-03-12

申请人： Zhi Zhou ,  Yeong-taeg Kim

发明人： Zhi Zhou ,  Yeong-taeg Kim

IPC分类号： H04N7/12

CPC分类号： G06K9/3266 ,  G06K2209/01

摘要： A vertical scrolling region detector may include a motion estimator that can generate motion vectors between blocks of two or more primary frames of a mixed-mode video sequence. The detector may also include a primary frame motion analyzer that can analyze the motion vectors to detect substantially constant vertical motion of at least some of the blocks between the two or more primary frames. The presence of substantially constant vertical motion may reflect the presence of a vertical scrolling region in the mixed-mode video sequence. Moreover, the detector may also include a consecutive frame motion analyzer that can calculate differences in pixel values between lines of two or more consecutive frames in the mixed-mode video sequence. The differences in pixel values may further reflect the presence of the vertical scrolling region in the mixed-mode video sequence.

摘要翻译： 垂直滚动区域检测器可以包括运动估计器，其可以在混合模式视频序列的两个或多个主要帧的块之间生成运动矢量。 检测器还可以包括主帧运动分析器，其可以分析运动矢量以检测两个或更多个主帧之间的至少一些块的基本恒定的垂直运动。 基本上恒定的垂直运动的存在可以反映混合模式视频序列中垂直滚动区域的存在。 此外，检测器还可以包括可以计算混合模式视频序列中两个或更多个连续帧的行之间的像素值的差异的连续帧运动分析器。 像素值的差异可进一步反映混合模式视频序列中垂直滚动区域的存在。