公开(公告)号：EP1492356A3

公开(公告)日：2005-11-23

申请号：EP04077170.1

申请日：1999-11-12

申请人： CNH Canada Ltd.

发明人： Classen, Brian J. ,  Christoff, Jordan C.

IPC分类号： H04N9/64 ,  H04N9/73 ,  H04N5/235

CPC分类号： H04N9/735

摘要： A method of identifying pixels of a given color in a field of YUV video manipulates color difference signals (R-Y, B-Y) corresponding to defining axes (U, V) of a color space to maximize the video signal in a region of interest of the space, and minimize the signal in all other regions. Additionally, the color difference signal corresponding to one axis may be rotated toward the other axis, or the entire color space may be rotated to bring the region of interest onto or near one of the axes. The signal gains and rotations may be carried out in the signal processing circuits of a conventional color camera (12) so that only one comparator is needed to detect target color. After rotation and application of gain, the color difference signal defining the region of interest is compared with a threshold value to determine if a pixel is of the target color. A video camera may be mounted on an agricultural sprayer to detect green weeds on the brown soil, by identifying the green pixels in the image captured while the sprayer travels in the field. A spray material may be released upon the weed once the weed is detected.

公开(公告)号：EP1591994A1

公开(公告)日：2005-11-02

申请号：EP04708918.0

申请日：2004-02-06

申请人： SANYO ELECTRIC CO., LTD.

发明人： KINOSHITA, Shigeo, C/o Sanyo Electric Co., Ltd. ,  MORI, Yukio, C/o Sanyo Electric Co., Ltd. ,  YAMASHITA, Atsuhiro, C/o Sanyo Electric Co., Ltd. ,  TANASE, Susumu, C/o Sanyo Electric Co., Ltd. ,  INOUE, Masutaka, C/o Sanyo Electric Co., Ltd.

IPC分类号： G09G5/02 ,  H04N1/46 ,  H04N1/40 ,  H04N9/64

CPC分类号： G09G5/02 ,  G09G3/3208 ,  G09G2360/16 ,  H04N9/64 ,  H04N9/67

摘要： A color space correction circuit in a display apparatus comprises: means for holding optimal R, G and B correction values at chromaticity coordinate points corresponding to a white, primary colors and complementary colors, respectively, in a color reproduction region of a display on a chromaticity diagram; means for connecting the respective chromaticity coordinate points corresponding to the primary colors and the complementary colors to the chromaticity coordinate point corresponding to the white in the color reproduction region of the display on the chromaticity diagram, thereby dividing the color reproduction region of the display into a plurality of areas and judging to which area the chromaticity coordinate points corresponding to input signals belong; and means for correcting R, G and B values for the input signals based on optimal R, G and B correction values corresponding to the chromaticity coordinate points that correspond to three vertexes of the area to which the chromaticity coordinate points corresponding to the input signals are judged to belong, and based on the R, G and B values for the input signals.

公开(公告)号：EP1379079B1

公开(公告)日：2005-10-12

申请号：EP02718544.6

申请日：2002-04-11

申请人： SONY CORPORATION

发明人： SHIMAZAKI, Shingo c/o SONY CORPORATION

IPC分类号： H04N5/208 ,  H04N9/64

CPC分类号： H04N5/208 ,  H04N5/33 ,  H04N9/646 ,  H04N2209/048

摘要： A contour-emphasizing device (20) comprises a filter (51) for extracting the high-frequency component in the horizontal direction from a video signal, a rise/fall detecting section (52) for detecting the rise/fall of the horizontal component of the video signal, and a waveform balancer (53) for multiplying the gain by the extracted high-frequency component by means of the filter (51) and thereby generating an emphasizing signal for emphasizing the original video signal. The waveform balancer (53) changes the gain to a value over one if the signal part is the rise of the video signal and the high-frequency component is positive and to a value below one if the signal part is the rise of the video signal and the high-frequency component is negative. The waveform balancer (53) changes the gain to a value below one if the signal part is the fall of the video signal and the high-frequency component is positive and to a value over one if the signal part is the fall of the video signal and the high-frequency component is negative.

公开(公告)号：EP1583371A1

公开(公告)日：2005-10-05

申请号：EP03772709.6

申请日：2003-11-12

申请人： SONY CORPORATION

发明人： ISHIGAMI, Koichiro ,  KATO, Naoya

IPC分类号： H04N9/64

CPC分类号： H04N1/6086 ,  H04N1/6027 ,  H04N9/735

摘要： A light source estimation method of this invention estimates from the sensor response the color characteristics of an unknown light source of an image-pickup scene, in order to improve white balance adjustment and other aspects of the quality of color reproduction; a projection conversion portion 6 projects sensor response values 5 into an image distribution 9 in an evaluation space not dependent on the image-pickup light source 2 using parameters obtained by operations which can be colorimetrically approximated from spectral sensitivity characteristics of image-pickup unit 4, which are known, and from spectral characteristics of an assumed test light source 1; an evaluation portion 10 evaluates the correctness of a plurality of the test light sources 1 based on the distribution state of sample values of the projected scene; and accordingly, the correct image-pickup light source 2 is estimated.

公开(公告)号：EP1578140A2

公开(公告)日：2005-09-21

申请号：EP04364022.6

申请日：2004-03-19

申请人： Thomson Licensing S.A.

发明人： Yeung, Raymond c/o Thomson

IPC分类号： H04N9/64 ,  H04N9/11

CPC分类号： H04N1/6058 ,  H04N1/6052

摘要： The invention provides a color processing system comprising an image capture device for capturing a scene and providing first color image data representative of the scene.
A color space transformer is coupled to the image capture device for transforming the first color image data to second color image data. A first display device is coupled to the color transformer. The first display device displays the scene as represented by the second color image data. The color transformer includes a processor programmed to perform a matrix operation upon the first color image data by selecting matrix elements from a look up table (LUT) comprising pre-computed values.

公开(公告)号：EP1543679A1

公开(公告)日：2005-06-22

申请号：EP03797415.1

申请日：2003-08-08

申请人： Koninklijke Philips Electronics N.V.

发明人： CORTENRAAD, Hubertus, M., R. ,  VAN DEN BIGGELAAR, Peter

IPC分类号： H04N5/14 ,  H04N9/64 ,  H04N5/68

CPC分类号： G09G1/002 ,  H04N5/141 ,  H04N5/68 ,  H04N9/645

摘要： The display apparatus comprises a picture tube (CRT) with an electron gun which generates an electron beam (EB) directed towards a display screen. The electron gun comprises a first and a second electrode (CA, G1). The electron beam (EB) originates from the first electrode (CA). The voltage between the first electrode (CA) and the second electrode (G1) controls the intensity of the electron beam (EB). A beam current (IB) flows in the first electrode (CA) in response to the electron beam (EB). A total current (ICA) in the first electrode (CA) is the sum of the beam current (IB) and a current (IC) flowing through a capacitance (CIN) between the first and the second electrode (CA, G1). A compensation circuit (COM) supplies a compensation current (ICO) to the first electrode (CA) to compensate for a capacitive current (IC) through a capacitance (CIN) between the first and the second electrode (CA, G1). A beam current measurement circuit (BMC) measures the total current (IT) which is the sum of the total current in the first electrode (ICA) and the compensation current (ICO).

公开(公告)号：EP1538849A1

公开(公告)日：2005-06-08

申请号：EP04028353.3

申请日：2004-11-30

申请人： SEIKO EPSON CORPORATION

发明人： Nashida, Yukihiro

IPC分类号： H04N9/64 ,  G09G5/00

CPC分类号： H04N9/641 ,  G09G5/006 ,  G09G5/04 ,  H04N9/3179

摘要： The procedure of the invention acquires a maximum RB value, which is a largest value of an R signal component and a B signal component, on the assumption that the signal format of an input video signal is an RGB signal, and obtains an RGB probability corresponding to a degree of largeness of the maximum RB value. The procedure also acquires a minimum color difference value, which is a smallest value of a color difference signal component, on the assumption that the signal format of the input video signal is a Y/color difference signal, and obtains a color difference probability corresponding to a degree of smallness of the minimum color difference value. The procedure compares the RGB probability with the color difference probability and thereby determines whether the signal format of the input video signal is the RGB signal or the Y/color difference signal. This arrangement effectively enhances the accuracy of discrimination between the RGB signal and the Y/color difference signal.

摘要翻译： 假设输入视频信号的信号格式为RGB信号，本发明的程序获取作为R信号分量和B信号分量的最大值的最大RB值，并获得对应的RGB概率 达到最大RB值的大小。 假设输入视频信号的信号格式是Y /色差信号，该程序还获取最小色差值，其是色差信号分量的最小值，并且获得对应于 最小色差值的小程度。 该过程将RGB概率与色差概率进行比较，从而确定输入视频信号的信号格式是RGB信号还是Y /色差信号。 这种布置有效地提高了RGB信号和Y /色差信号之间的辨别精度。

公开(公告)号：EP1280126A4

公开(公告)日：2005-06-08

申请号：EP01949055

申请日：2001-02-05

申请人： NICHIA CORP

发明人： NAGAI YOSHIFUMI ,  TSUJIMOTO HIROSHI ,  NAKANO YOSHIYUKI ,  TSUJI RYUHEI

IPC分类号： H04N9/30 ,  G09G1/28 ,  G09G3/20 ,  G09G3/32 ,  G09G5/02 ,  H04N9/64

CPC分类号： G09G3/2077 ,  G09G1/285 ,  G09G3/2003 ,  G09G3/2014 ,  G09G3/32 ,  G09G3/3283 ,  G09G5/02 ,  G09G2300/06 ,  G09G2310/027 ,  G09G2310/0272 ,  G09G2320/02 ,  G09G2320/0285 ,  G09G2320/0666 ,  G09G2340/06 ,  G09G2360/145

摘要： An image display exhibiting high reproducibility by correcting variation in the chromaticity of light emitting elements and thereby uniforming the color tone of pixels, and a control method thereof. The image display comprises a display section (10) where light emitting elements of a plurality of color tones are arranged for each pixel, a drive section (50) for supplying the light emitting elements of each pixel with a drive current according to image data concerning the color tones, and a chromaticity correcting section (11) for distributing a specified part of drive current, supplied from the drive section (50) to a light emitting element corresponding to at least one of the color tones of each pixel, to a light emitting element corresponding to one or more other color tone of the pixel.

公开(公告)号：EP1531630A1

公开(公告)日：2005-05-18

申请号：EP04257055.6

申请日：2004-11-12

申请人： Fujitsu General Limited

发明人： Kiyama, Shuji ,  Bannai, Masayuki ,  Fukuchi, Masakazu ,  Onodera, Junichi

IPC分类号： H04N9/64

CPC分类号： H04N9/643 ,  H04N1/6027 ,  H04N1/6075

摘要： The present invention provides a color correction process designed for enabling all the hues in the image properly corrected without leaving any uncorrected range. The inputted image data represented by the combination of 3 color signals is divided into a plurality of ranges by the hue so that color correction can be made by the range of each hue. In the color correction processing circuit by each hue, in order for the peripheral area of the range set for color correction to be prevented from being left uncorrected, the color correction process is designed so that correction ranges peripherally overlap with one another.

摘要翻译： 本发明提供了一种颜色校正过程，其被设计用于使图像中的所有色调均正确地校正，而不会留下任何未校正的范围。 由3种颜色信号的组合表示的输入图像数据通过色调被划分为多个范围，从而可以通过每个色调的范围进行颜色校正。 在颜色校正处理电路中，通过每个色调，为了防止为颜色校正设置的范围的周边区域未被校正，颜色校正处理被设计为使得校正范围在外围彼此重叠。

公开(公告)号：EP1528793A2

公开(公告)日：2005-05-04

申请号：EP04256595.2

申请日：2004-10-26

申请人： CANON KABUSHIKI KAISHA

发明人： Masumura, Takahiro ,  Fukumoto, Toshihiro

IPC分类号： H04N1/60 ,  H04N9/64

CPC分类号： H04N5/217

摘要： An image processing apparatus capable of properly correcting an image component corresponding to non-image-forming light and generated in image data or the like obtained when an object having high luminance is taken. The image processing apparatus processes image data include a first image component corresponding to image-forming light and a second image component corresponding to non-image-forming light. The image processing apparatus comprises an image-taking section (1) which obtains the image data and a correction section (4) which performs a correction processing for the image data so as to reduce the visibility of the second image component. The correction section performs color conversion processing as the correction processing.

摘要翻译： 一种图像处理装置，其能够适当地校正对应于非成像光并且在拍摄具有高亮度的物体时获得的图像数据等中产生的图像成分。 图像处理装置处理图像数据包括对应于图像形成光的第一图像分量和对应于非图像形成光的第二图像分量。 图像处理装置包括获取图像数据的图像获取部分（1）和对图像数据执行校正处理以便降低第二图像分量的可视性的校正部分（4）。 校正部分执行颜色转换处理作为校正处理。