公开(公告)号：US20060244849A1

公开(公告)日：2006-11-02

申请号：US11295660

申请日：2005-12-07

Applicant: Li-ming Chen ,  Cheng-Yu Wu

Inventor： Li-ming Chen ,  Cheng-Yu Wu

IPC: H04N5/202

CPC classification number: G09G5/06 ,  G09G2320/0673 ,  H04N5/202

Abstract: A gamma correction method and system, which performs a gamma correction on an n-bit video signal to thus generate a gamma correction value. At first, a first primary index and a first sub-index are obtained by performing an index mapping on a value of the video signal. Next, a first gamma value is obtained by performing a table lookup on the first primary index and the first sub-index. Next, a second primary index and a second sub-index are obtained by performing the index mapping on the first gamma value. Next, multiple thresholds are obtained by performing the table lookup on the second primary index and the second sub-index. Finally, the value of the video signal and the multiple thresholds are compared to accordingly correct the first gamma value and generate the gamma correction value.

Abstract translation: 一种伽马校正方法和系统，其对n位视频信号执行伽马校正，从而产生伽马校正值。 首先，通过对视频信号的值执行索引映射来获得第一主索引和第一子索引。 接下来，通过对第一主索引和第一子索引执行表查找来获得第一伽马值。 接下来，通过对第一伽马值执行索引映射来获得第二主索引和第二子索引。 接下来，通过对第二主索引和第二子索引执行表查找来获得多个阈值。 最后，将视频信号的值和多个阈值进行比较，从而相应地校正第一伽马值并产生伽马校正值。

公开(公告)号：US06757079B1

公开(公告)日：2004-06-29

申请号：US09524289

申请日：2000-03-13

Applicant: Li-ming Chen

Inventor： Li-ming Chen

IPC: G06K936

CPC classification number: H04N1/40087

Abstract: A method and apparatus for forming multi-level dither images from an input digital image are disclosed. The difference between a pixel value of the input digital image and a pixel value of a dither image corresponding to the input digital image is first determined. Next, the difference is processed by an error filter to correct the pixel value of the input digital image to generate a corrected image pixel value. The corrected image pixel value is then compared to at least two threshold values, each corresponding to a pixel value of the dither image, to determine a threshold value that is nearest to the corrected image pixel value, thereby obtaining a pixel value of the dither image corresponding to said threshold value.

Abstract translation: 公开了一种用于从输入数字图像形成多级抖动图像的方法和装置。 首先确定输入数字图像的像素值与对应于输入数字图像的抖动图像的像素值之间的差异。 接下来，通过误差滤波器处理该差异，以校正输入数字图像的像素值，以生成校正图像像素值。 然后将校正后的图像像素值与至少两个阈值进行比较，每个至少两个阈值对应于抖动图像的像素值，以确定最接近校正图像像素值的阈值，从而获得抖动图像的像素值 对应于所述阈值。

公开(公告)号：US20050259737A1

公开(公告)日：2005-11-24

申请号：US11076928

申请日：2005-03-11

Applicant: Tse-an Chou ,  Li-ming Chen

Inventor： Tse-an Chou ,  Li-ming Chen

IPC: G06F3/03 ,  G06K9/30 ,  H04N5/14 ,  H04N7/12

CPC classification number: G06F3/0317 ,  H04N5/145

Abstract: An optimal correlation matching method for determining track behavior, which applies a video stream having a first image and a second image for locating a motion vector associated with a block of the first image in the second image, wherein each image has a plurality of blocks in rows and columns and each block has a plurality of pixels in rows and columns. The method divides a search window into a plurality of search subdivisions, selects one from the subdivisions as an operating search window, locates a center of a block respectively at all positions of the operating search window such that upon each position of the center located, pixels of the block of the first image in accordance with the operating search window are applied to corresponding pixels of the second image for performing match operation, thereby reducing required number for match operation.

Abstract translation: 一种用于确定轨迹行为的最佳相关匹配方法，其应用具有第一图像和第二图像的视频流，用于定位与第二图像中的第一图像的块相关联的运动矢量，其中每个图像具有多个块 行和列，并且每个块具有行和列中的多个像素。 该方法将搜索窗口划分成多个搜索子部分，从细分中选择一个作为操作搜索窗口，将块的中心分别位于操作搜索窗口的所有位置处，使得在位于中心的每个位置时，像素 根据操作搜索窗口将第一图像的块应用于第二图像的对应像素以进行匹配操作，从而减少匹配操作所需的数量。

公开(公告)号：US06697533B1

公开(公告)日：2004-02-24

申请号：US09534173

申请日：2000-03-24

Applicant: Jiann-Jong Tsai ,  Li-ming Chen

Inventor： Jiann-Jong Tsai ,  Li-ming Chen

IPC: G06K940

CPC classification number: G06T5/20

Abstract: A filtering circuit for image signal processing has a high frequency filtering circuit and a low frequency filtering circuit. The high frequency filtering circuit only includes one adder to obtain a high frequency component. The low frequency filtering circuit includes one adder and utilizes the high frequency component generated by the high frequency filtering circuit to obtain a low frequency component.

Abstract translation: 用于图像信号处理的滤波电路具有高频滤波电路和低频滤波电路。 高频滤波电路仅包括一个加法器以获得高频分量。 低频滤波电路包括一个加法器，并利用由高频滤波电路产生的高频分量来获得低频分量。