公开(公告)号：US07609325B2

公开(公告)日：2009-10-27

申请号：US11274987

申请日：2005-11-15

申请人： Seok-Jun Park ,  Gwang-Sun Lee ,  Yong-In Han ,  Jung-Tae Kim

发明人： Seok-Jun Park ,  Gwang-Sun Lee ,  Yong-In Han ,  Jung-Tae Kim

IPC分类号： H04N5/46

CPC分类号： H04N5/2628 ,  H04N7/0122

摘要： A method and an apparatus for calculating source image coordinates. In an embodiment, a variation rate of the source image coordinate with respect to a converted image coordinate is calculated by a recursive computation, and variation rates are accumulated to obtain the source image coordinate. Because the converted image coordinate sequentially increases one-by-one, the variation rate may be obtained by using adding operations of previously obtained source image coordinate, rather than multiplying operations with the all of the converted image coordinates. Therefore, the source image coordinates may simply and effectively be calculated.

摘要翻译： 一种用于计算源图像坐标的方法和装置。 在一个实施例中，通过递归计算来计算相对于转换图像坐标的源图像坐标的变化率，并且累积变化率以获得源图像坐标。 由于转换的图像坐标依次逐渐增加，所以可以通过使用先前获得的源图像坐标的相加运算而不是将运算与所有转换的图像坐标相乘来获得变化率。 因此，可以简单有效地计算源图像坐标。

公开(公告)号：US20090154830A1

公开(公告)日：2009-06-18

申请号：US12331983

申请日：2008-12-10

申请人： HWE-IHN CHUNG ,  YONG-IN HAN

发明人： HWE-IHN CHUNG ,  YONG-IN HAN

IPC分类号： G06K9/40 ,  G06K9/32

CPC分类号： G06T3/403

摘要： The present invention is an interpolation device and method. According to the present invention, a plurality of pixels close to a pixel to be interpolated are sequentially set to a central pixel. When a pixel difference closest to a threshold value among pixel differences between the central pixel and a plurality of pixels around the central pixel belongs to a quasi-edge decision range, an edge interpolation and a bilinear interpolation are mixed to interpolate the pixel to be interpolated. As a result, it is possible to prevent reduction in image quality due to an edge verdict caused by unstable input image signal and perform a stable interpolation operation.

摘要翻译： 本发明是一种内插装置和方法。 根据本发明，靠近要插值的像素的多个像素被顺序地设置到中心像素。 当中心像素与中心像素周围的多个像素之间的像素差最接近阈值的像素差属于准边缘判定范围时，将边缘插值和双线性插值混合以内插待内插的像素 。 结果，可以防止由于不稳定的输入图像信号导致的边缘判定造成的图像质量的降低，并且执行稳定的插值操作。

公开(公告)号：US07268753B2

公开(公告)日：2007-09-11

申请号：US10291652

申请日：2002-11-12

申请人： Seong-deok Lee ,  Chang-yeong Kim ,  Yang-seock Seo ,  Yong-in Han

发明人： Seong-deok Lee ,  Chang-yeong Kim ,  Yang-seock Seo ,  Yong-in Han

IPC分类号： G09G3/30

CPC分类号： H04N9/77 ,  H04N9/68

摘要： Provided are an image brightness controlling apparatus and method, and an adaptive brightness controlling apparatus and method based on the brightness degree and/or brightness range of an image. The image brightness controlling apparatus includes a brightness increment arithmetic unit for outputting a brightness increment for a pixel, and an individual component brightness increment arithmetic unit for outputting the brightness increments of individual components constituting the pixel in response to the brightness increment for a pixel. The individual component brightness increment arithmetic unit multiplies the brightness increment of the pixel by each of the unit vectors of the components constituting the pixel to obtain the brightness increments of the individual components. The image brightness controlling apparatus further includes an adder for adding the components constituting the pixel to the brightness increments of the components. The image brightness controlling apparatus and the adaptive image brightness controlling apparatus can maintain the sense of color of an image (e.g., the hue or chroma of an image) while increasing the brightness degree and brightness range of an image.

摘要翻译： 提供了一种图像亮度控制装置和方法，以及基于图像的亮度和/或亮度范围的自适应亮度控制装置和方法。 图像亮度控制装置包括用于输出像素的亮度增量的亮度增量运算单元和用于响应于像素的亮度增量而输出构成像素的各个分量的亮度增量的单独分量亮度增量运算单元。 单个分量亮度增量算术单元将构成像素的分量的每个单位向量的像素的亮度增量相乘以获得各个分量的亮度增量。 图像亮度控制装置还包括用于将构成像素的分量与分量的亮度增量相加的加法器。 图像亮度控制装置和自适应图像亮度控制装置可以在增加图像的亮度和亮度范围的同时，保持图像的颜色感（例如，图像的色相或色度）。

公开(公告)号：US07102695B2

公开(公告)日：2006-09-05

申请号：US10440679

申请日：2003-05-19

申请人： Yong-In Han ,  Chang-Yeong Kim ,  Seong-Deok Lee ,  Chang-Won Huh ,  Seok-Joon Park

发明人： Yong-In Han ,  Chang-Yeong Kim ,  Seong-Deok Lee ,  Chang-Won Huh ,  Seok-Joon Park

IPC分类号： H04N5/52 ,  H04N5/57 ,  H04N9/64 ,  G09G5/00 ,  G09G5/02 ,  G09G5/10

CPC分类号： H04N5/57 ,  H04N9/68 ,  H04N21/4318 ,  H04N21/44008

摘要： A method and apparatus for selectively enhancing contrast depending on the level of incoming video signals while preserving colors are provided. An apparatus for enhancing the contrast and brightness of a video signal displayed on a display device includes: a first luminance level transformation circuit that receives luminance and chrominance signals, reduces the level of the luminance signal in response to a first control signal, and outputs the chrominance signals and the luminance signal whose level has been reduced; an image converting circuit that receives the output signals from the first luminance level transformation circuit and converts the received signals into RGB video signals; and a second luminance level transformation circuit that receives the RGB video signals from the image converting circuit, concurrently increases the respective levels of the RGB video signals in response to a second control signal, and outputs the RGB video signals whose levels have been increased. It is desirable that the display device is a color display tube (“CDT”), a thin film transistor liquid crystal display (“TFT-LCD”), or a plasma display panel (“PDP”).

摘要翻译： 提供了一种用于在保留颜色的同时根据输入视频信号的电平有选择地增强对比度的方法和装置。 一种用于增强显示装置上显示的视频信号的对比度和亮度的装置，包括：接收亮度和色度信号的第一亮度级变换电路，响应于第一控制信号降低亮度信号的电平，并输出 色度信号和电平降低的亮度信号; 图像转换电路，接收来自第一亮度级变换电路的输出信号，并将接收的信号转换为RGB视频信号; 以及从图像转换电路接收RGB视频信号的第二亮度电平变换电路，响应于第二控制信号同时增加RGB视频信号的各个电平，并输出其电平已经增加的RGB视频信号。 期望显示装置是彩色显像管（“CDT”），薄膜晶体管液晶显示器（“TFT-LCD”）或等离子体显示面板（“PDP”）。

公开(公告)号：US20060103680A1

公开(公告)日：2006-05-18

申请号：US11274987

申请日：2005-11-15

申请人： Seok-Jun Park ,  Gwang-Sun Lee ,  Yong-In Han ,  Jung-Tae Kim

发明人： Seok-Jun Park ,  Gwang-Sun Lee ,  Yong-In Han ,  Jung-Tae Kim

IPC分类号： G09G5/00

CPC分类号： H04N5/2628 ,  H04N7/0122

摘要： A method and an apparatus for calculating source image coordinates. In an embodiment, a variation rate of the source image coordinate with respect to a converted image coordinate is calculated by a recursive computation, and variation rates are accumulated to obtain the source image coordinate. Because the converted image coordinate sequentially increases one-by-one, the variation rate may be obtained by using adding operations of previously obtained source image coordinate, rather than multiplying operations with the all of the converted image coordinates. Therefore, the source image coordinates may simply and effectively be calculated.

公开(公告)号：US20050105830A1

公开(公告)日：2005-05-19

申请号：US10987615

申请日：2004-11-12

申请人： Hwe-Ihn Chung ,  Yong-In Han

发明人： Hwe-Ihn Chung ,  Yong-In Han

IPC分类号： H04N5/44 ,  G06K9/32 ,  G06K9/40

CPC分类号： G06T3/403

摘要： The present invention is an interpolation device and method. According to the present invention, a plurality of pixels close to a pixel to be interpolated are sequentially set to a central pixel. When a pixel difference closest to a threshold value among pixel differences between the central pixel and a plurality of pixels around the central pixel belongs to a quasi-edge decision range, an edge interpolation and a bilinear interpolation are mixed to interpolate the pixel to be interpolated. As a result, it is possible to prevent reduction in image quality due to an edge verdict caused by unstable input image signal and perform a stable interpolation operation.

摘要翻译： 本发明是一种内插装置和方法。 根据本发明，靠近要插值的像素的多个像素被顺序地设置到中心像素。 当中心像素与中心像素周围的多个像素之间的像素差最接近阈值的像素差属于准边缘判定范围时，将边缘插值和双线性插值混合以内插待内插的像素 。 结果，可以防止由于不稳定的输入图像信号引起的边缘判定造成的图像质量的降低，并且执行稳定的插值操作。

公开(公告)号：US06674906B1

公开(公告)日：2004-01-06

申请号：US09492589

申请日：2000-01-27

申请人： Yong In Han ,  Hwe-ihn Chung

发明人： Yong In Han ,  Hwe-ihn Chung

IPC分类号： G06K948

CPC分类号： G06T7/12 ,  G06T2207/30176

摘要： A method and apparatus for detecting edges by which the detection of the edges of a natural image from an image obtained by mixing the graphic or text and the natural image is suppressed, to thereby stably detect edges of the graphic or the text, are disclosed. In this method, the differences in pixel value between the first pixel of sequentially input images and eight pixels adjacent to the first pixel are obtained. If all of the differences between the first pixel and the eight pixels adjacent to the first pixel are greater than a maximum threshold value or less than a minimum threshold value, the first pixel is determined to be an edge pixel. Likewise, determinations are made as to whether a second pixel, positioned adjacent the first pixel along a first dimension (for example to the left of the first pixel), is an edge pixel and whether a third pixel, positioned adjacent the first pixel along a second dimension (for example above the first pixel), is an edge pixel. Next, if at least one of the first pixel and the second pixel is determined as an edge pixel and if the difference between the first pixel and the second pixel is greater than the maximum threshold value, it is determined that the left edge of the first pixel exists. Also, if at least one of the first pixel and the third pixel is an edge pixel and the difference between the first pixel and the third pixel is greater than the maximum threshold value, it is determined that the upper edge of the first pixel exists.

摘要翻译： 公开了一种用于检测边缘的方法和装置，通过该边缘检测从通过混合图形或文本和自然图像获得的图像中的自然图像的边缘的检测，从而稳定地检测图形或文本的边缘。 在该方法中，获得顺序输入图像的第一像素与与第一像素相邻的八个像素之间的像素值的差异。 如果第一像素与与第一像素相邻的八个像素之间的所有差异大于最大阈值或小于最小阈值，则将第一像素确定为边缘像素。 同样，确定沿着第一维度（例如，第一像素的左侧）定位在第一像素附近的第二像素是否为边缘像素，以及沿着第一像素沿着第一像素位于第一像素周围的第三像素 第二维度（例如高于第一像素）是边缘像素。 接下来，如果第一像素和第二像素中的至少一个被确定为边缘像素，并且如果第一像素和第二像素之间的差大于最大阈值，则确定第一像素和第二像素的左边缘 像素存在。 此外，如果第一像素和第三像素中的至少一个是边缘像素，并且第一像素和第三像素之间的差大于最大阈值，则确定存在第一像素的上边缘。