Threshold matrix generation method, threshold matrix generation apparatus, and recording medium

    公开(公告)号:US20060152767A1

    公开(公告)日:2006-07-13

    申请号:US11326481

    申请日:2006-01-06

    IPC分类号: H04N1/40

    CPC分类号: H04N1/4051 H04N1/4055

    摘要: In a threshold matrix generation part 3 implemented by a computer, a tint image in a specified gray level is generated from temporary lighting order set in a matrix area, and a smoothing operation is performed on the tint image, to generate a grayscale evaluation image. The lighting order is modified by changing ordinal numbers in the lighting order of respective positions included in specified areas in the matrix area which correspond to areas around boundaries of halftone dot areas in the tint image on the basis of values of corresponding pixels in the evaluation image. With this operation, when the smoothing operation is performed on a tint image in the specified gray level generated in accordance with a modified lighting order, a variation among values of pixels included in the specified areas becomes smaller than a variation among values of pixels included in the specified areas in a case where the smoothing operation is performed on the tint image in the specified gray level generated in accordance with an unmodified lighting order. Then, threshold values are determined in the matrix area with reflecting the modified lighting order, to generate the threshold matrix which is possible to suppress graininess in a generated halftone dot image.

    Method of generating threshold matrix for creating halftone dot image and method and apparatus for creating halftone dot image and recording medium
    52.
    发明申请
    Method of generating threshold matrix for creating halftone dot image and method and apparatus for creating halftone dot image and recording medium 有权
    产生用于创建半色调点图像的阈值矩阵的方法和用于创建半色调点图像和记录介质的方法和装置

    公开(公告)号:US20050264834A1

    公开(公告)日:2005-12-01

    申请号:US11109728

    申请日:2005-04-20

    IPC分类号: H04N1/405 H04N1/52 H04N1/58

    摘要: To generate a threshold matrix which is compared with an original image in creating a halftone dot image for each color component, in a matrix area for one color component, dot centers are arranged almost uniformly in a random fashion at a predetermined density and in a matrix area for another color component, dot centers are arranged almost uniformly in a random fashion at a density about 0.7 times the predetermined density. Then, threshold values are set so that dots should grow around the dot centers in accordance with an increase in gray level of the original image, to generate the threshold matrix for each color component. In creating the halftone dot images by using these threshold matrixes, characteristics of spatial frequency of the halftone dot images of these color components can be represented in a frequency space as areas (75K, 75C) in a shape of concentric rings. As a result, it is possible to create a multicolor halftone dot image with less graininess, with no portions approximate to each other in the characteristics of spatial frequency of these halftone dot images.

    摘要翻译: 为了产生与原始图像进行比较以创建每个颜色分量的半色调点图像的阈值矩阵,在一个颜色分量的矩阵区域中,以预定密度和矩阵的随机方式几乎均匀地布置点中心 面积为另一种颜色分量,点中心几乎均匀地以约0.7倍于预定密度的密度随机排列。 然后,设置阈值,使得根据原始图像的灰度级的增加,点应该围绕点中心生长,以产生每个颜色分量的阈值矩阵。 在通过使用这些阈值矩阵创建半色调点图像时,这些颜色分量的半色调点图像的空间频率的特性可以在频率空间中表示为同心圆形区域(75K,75C)。 结果,可以产生具有较少颗粒度的多色半色调点图像,在这些半色调网点图像的空间频率的特性中没有彼此近似的部分。

    Optical transmitter
    53.
    发明授权
    Optical transmitter 失效
    光发射机

    公开(公告)号:US06600585B1

    公开(公告)日:2003-07-29

    申请号:US09375381

    申请日:1999-08-17

    申请人: Masayuki Nakano

    发明人: Masayuki Nakano

    IPC分类号: H04B1004

    摘要: An optical transmitter includes a light-emitting diode, a drive circuit for outputting a light signal while driving the light-emitting diode which is connected between two electrodes of an anode and a cathode of the light-emitting diode, a voltage applying terminal for a light-emitting diode which is arranged on a package on which the light-emitting diode and the drive circuit are mounted, for applying a voltage to one electrode of the light-emitting diode, and a current supplying terminal for screening a light-emitting diode and arranged on the package for applying a current to the other electrode of the light-emitting diode at a time of screening the light-emitting diode.

    摘要翻译: 光发射机包括发光二极管,用于在连接在发光二极管的阳极和阴极的两个电极之间的发光二极管的同时输出光信号的驱动电路,用于发光二极管的电压施加端子 布置在其上安装有发光二极管和驱动电路的封装上的用于向发光二极管的一个电极施加电压的发光二极管和用于屏蔽发光二极管的电流供给端子 并且布置在封装件上,以在屏蔽发光二极管时将电流施加到发光二极管的另一个电极。

    Semiconductor light emitting diode and method of producing the same
    57.
    发明授权
    Semiconductor light emitting diode and method of producing the same 有权
    半导体发光二极管及其制造方法

    公开(公告)号:US09287458B2

    公开(公告)日:2016-03-15

    申请号:US13148777

    申请日:2010-02-08

    IPC分类号: H01L33/38 H01L33/62 H01L33/00

    摘要: A semiconductor light emitting diode comprising: a support substrate; an intermediate layer including an intermediate electrode portion, a second conductive semiconductor layer, an active layer, a first conductive semiconductor layer and an upper electrode portion sequentially disposed on the upper surface side of the support substrate in this order; and a lower electrode layer provided on the lower surface side of the support substrate, wherein: the intermediate layer has at least one intermediate electrode portion extending linearly or in an island-like shape; and the upper electrode portion and the intermediate electrode portion are disposed, in a view obtained by projecting these electrode portions, on an imaginary plane in parallel with the upper surface of the support substrate, respectively, in a positional relationship that these electrode portions, are offset from each other.

    摘要翻译: 一种半导体发光二极管,包括:支撑衬底; 依次设置在支撑基板的上表面侧的中间电极部,第二导电半导体层,有源层,第一导电半导体层和上电极部分的中间层; 以及设置在所述支撑基板的下表面侧的下电极层,其中:所述中间层具有直线状或岛状形状的至少一个中间电极部, 并且上电极部分和中间电极部分分别以这些电极部分的位置关系设置在通过将这些电极部分投影在与支撑基板的上表面平行的假想平面上的视图中 彼此偏移。