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1.发明公开IMAGE SIGNAL PROCESSING METHOD, IMAGE SIGNAL PROCESSING APPARATUS, AND IMAGE DISPLAYING APPARATUS 有权图像信号处理，图像信号处理装置及影像显示装置
公开(公告)号：EP1624678A4
公开(公告)日：2007-10-10
申请号：EP05720291
申请日：2005-03-02
发明人： YAMADA KAZUHIRO
CPC分类号： H04N9/69 , G09G3/20 , G09G2320/0613 , G09G2320/0673 , G09G2360/144 , G09G2360/16 , H04N5/20 , H04N5/202 , H04N5/58 , H04N5/70 , H04N21/42202 , H04N21/4318 , H04N2005/7466
摘要： An image signal processing method for nonlinear correcting image signals to be inputted to a display device (103), wherein the nonlinear correction characteristic is modified based on a brightness of the place where the display device (103) is located. According to this method, even when the display brightness of the display device (103) uniformly rises due to the ambient light, the characteristic of the brightness perceived by human being for image signals can be made linear.
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公开(公告)号：EP1583064A4
公开(公告)日：2007-07-04
申请号：EP04808047
申请日：2004-12-22
发明人： YAMADA KAZUHIRO
IPC分类号： G09G3/20 , G09G3/28 , G09G3/34 , H04N1/40 , H04N1/405 , H04N1/41 , G06T5/00 , G09G3/36 , G09G5/00 , H04N5/66
CPC分类号： H04N1/40087 , G09G3/2066 , G09G3/28 , G09G3/34 , H04N1/4052
摘要： A first adder circuit (101) adds an input image signal of a pixel of interest to each of values obtained by multiplying display errors of three pixels in a line immediately preceding the line of the pixel of interest by a weighting factor. Gradation candidate converting means (102) converts the gradation of the image signal as added into a plurality of usable gradations that may be used when adding the error of a left-hand adjacent pixel. A delay circuit (103) delays the image signal as added. A second adder circuit (104) adds the image signal as delayed to the value obtained by multiplying the error that has occurred at the left-hand adjacent pixel by the weighting factor. Gradation selecting means (105) selects, from among the plurality of gradation candidates, one that is the closest to the gradation of the image signal to which the error has been added, and outputs the selected one as the image signal of the pixel of interest. A difference circuit (106) calculates the display error of the pixel of interest.
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公开(公告)号：EP1557812A4
公开(公告)日：2006-04-12
申请号：EP04791958
申请日：2004-10-01
发明人： YAMADA KAZUHIRO
CPC分类号： G09G3/2062 , G09G3/2029 , G09G3/2044 , G09G3/288 , G09G2320/0266 , G09G2320/0276
摘要： The present invention provides an image display method that allows displaying a full range of gradation levels while reducing dynamic false contours. In this method, emission pattern information generation circuit (17) in image display device (1) that displays gradation by dividing a single field into a plurality of subfields and combining an emitted state and a non-emitted state for each subfield, generates plural pieces of emission pattern information so that an average emission rate becomes a given value or greater for any subfield with its brightness weight smaller than the maximum brightness weight of the subfield where its average emission rate is not zero. Further, dither generation circuit (19) in image display device (1) performs a time-averaging process and a space-averaging process for the plurality of pieces of emission pattern information.
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公开(公告)号：EP1426915A4
公开(公告)日：2008-02-13
申请号：EP03719184
申请日：2003-04-23
发明人： KAWAHARA ISAO , YAMADA KAZUHIRO
CPC分类号： G09G3/2029 , G09G3/20 , G09G3/2033 , G09G3/2803 , G09G2320/0261 , G09G2320/0266 , G09G2320/106 , H04N5/145 , H04N5/21 , H04N5/70
摘要： An image display device characterized in that an area where the gradation involves grade and which involves a motion is extracted from an image signal, predetermined gradation of the image signal is corrected to another gradation depending on the magnitude or direction of the motion of the area and on the magnitude or direction of the grade of the gradation, and intermediate OFF sub-fields causing moving picture pseudo-contour are dispersed thereby to display an image in which moving picture pseudo-contour is suppressed.
摘要翻译： 一种图像显示装置，其特征在于，从图像信号中提取灰度涉及等级并涉及运动的区域，根据区域运动的大小或方向将图像信号的预定灰度校正为另一灰度;以及 根据灰度等级的大小或方向以及导致运动图像伪轮廓的中间OFF子场被分散，从而显示其中抑制运动图像伪轮廓的图像。
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公开(公告)号：EP1583062A4
公开(公告)日：2008-08-20
申请号：EP03789637
申请日：2003-12-26
发明人： YAMADA KAZUHIRO , KAWAHARA ISAO
CPC分类号： G09G3/2059 , F02B2275/18 , G09G3/2029 , G09G3/2051 , G09G3/2803 , G09G2320/0261 , G09G2320/0266 , G09G2320/103
摘要： An image display apparatus such as a plasma display panel or the like wherein false contours of moving images can be suppressed with sufficient gray scale maintained. The image display apparatus includes a disturbance constant adding circuit (19) that generates a plurality of disturbance constants for the gray scale corresponding to an image signal and that selects and adds one of those disturbance constants to the image signal. Thus, disturbance is applied to and superimposed on each image signal, thereby scattering locations where false contours of moving images occur so as to make those false contours visually unnoticeable.
摘要翻译： 诸如等离子体显示面板等的图像显示设备可以在保持足够的灰度级的情况下抑制运动图像的错误轮廓。 该图像显示设备包括干扰常数加法电路（19），其产生对应于图像信号的灰度的多个干扰常数，并且选择这些干扰常数中的一个并将其加到图像信号上。 因此，干扰被施加并叠加在每个图像信号上，由此散射运动图像的假轮廓出现的位置，从而使这些假轮廓在视觉上不明显。
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公开(公告)号：EP1696407A4
公开(公告)日：2008-06-04
申请号：EP03782952
申请日：2003-12-26
发明人： YAMADA KAZUHIRO
CPC分类号： G09G3/2066 , G09G3/2029 , G09G3/2051 , G09G3/2055 , G09G3/2059 , G09G3/2077 , G09G2320/0261 , G09G2320/0266 , G09G2320/103
摘要： An image displaying method and an image display in which pseudo-profile of a moving image can be reduced while sustaining gradation even at a position where pseudo-profile of a moving image is significant. In the image displaying method and image display, gray level of a pixel is displayed while being converted into a display gray level in the case of a nonobjective pixel. In the case of an objective pixel, it is converted into a first gray level, i.e. an average value of n (an integer of 2 or above) gray levels selected from among the display gray levels. Pseudo-profile of a moving image is reduced while sustaining gradation by performing first diffusion process of averaging the first gray levels spatially and/or temporally using the n gray levels.
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