公开(公告)号：US5783959A

公开(公告)日：1998-07-21

申请号：US667412

申请日：1996-06-21

申请人： Yoshio Yokoyama

发明人： Yoshio Yokoyama

IPC分类号： G01R31/28 ,  G01R31/317 ,  G01R31/3183 ,  G01R31/319 ,  H04L7/06 ,  H03K5/13

CPC分类号： G01R31/31709 ,  G01R31/31922

摘要： A clock signal generator for an IC tester has a clock control circuit provided between a jitter reduction circuit and an IC device to be tested. The clock control circuit inhibit the clock signal from reaching the IC device for a time period required for a clock signal changes to a new frequency. The clock signal generator includes: a timing generator for generating clock signals and timing signals based on a test program, a pattern generator which receives the timing signals from the timing generator for producing test pattern signals to be supplied to the IC device based on the test program, a jitter reduction circuit for receiving a clock signal from the timing generator and for reducing a jitter of the clock signal, and a clock control circuit for inhibiting the clock signal from the jitter reduction circuit from being supplied to the IC device for a inhibit period determined by the test program when a frequency of the clock signal has been changed.

摘要翻译： 用于IC测试器的时钟信号发生器具有设置在抖动降低电路和要测试的IC器件之间的时钟控制电路。 时钟控制电路在时钟信号变为新频率所需的时间周期内阻止时钟信号到达IC器件。 时钟信号发生器包括：基于测试程序产生时钟信号和定时信号的定时发生器，从定时发生器接收定时信号的模式发生器，用于根据测试产生要提供给IC器件的测试模式信号 程序，用于从定时发生器接收时钟信号并减少时钟信号的抖动的抖动降低电路，以及用于禁止抖动降低电路的时钟信号被提供给IC器件以抑制时钟控制电路的时钟控制电路 当时钟信号的频率已经改变时由测试程序确定的周期。

公开(公告)号：US5440650A

公开(公告)日：1995-08-08

申请号：US215668

申请日：1994-03-22

申请人： Takashi Hieda ,  Yoshio Yokoyama

发明人： Takashi Hieda ,  Yoshio Yokoyama

IPC分类号： B41F33/14 ,  G01J1/42 ,  G01N21/84 ,  G01N21/88 ,  G01N21/93 ,  G01N21/956 ,  G06T1/00 ,  G06T7/00 ,  H01L21/66 ,  G06K9/00

CPC分类号： G06T7/001 ,  G06T2207/30144 ,  G06T2207/30148

摘要： An image processing system for inspection of an over-printed matter having at least first and second layers different in lightness under appropriate illumination, wherein a digital image of the surface of the overprinted matter is formed, first and second reference images representing each normal image of the first and second layers are memorized, a first deviation between a first boundary of the first reference image to the second reference image and a portion of the digital image corresponding with the first boundary is measured, a second deviation between a second boundary of the second reference image to the first reference image and a portion of the digital image corresponding with the second boundary is measured, the first reference image is corrected to a first corrected reference image in such a manner as to eliminate the measured first deviation, the second reference image is corrected to a second corrected reference image in such a manner as to eliminate the measured second deviation, a finally corrected reference image is produced on a basis of logical sum of the first and second corrected reference images, and a matching process of the finally corrected reference image and the digital image is carried out for discrimination of the quality of the surface of the overprinted matter.

摘要翻译： 一种图像处理系统，用于检查在适当照明下具有至少具有不同亮度的第一和第二层的过度印刷物体，其中形成所述套印物体的表面的数字图像，表示每个正常图像的第一和第二参考图像 存储第一层和第二层，测量第一参考图像与第二参考图像的第一边界和对应于第一边界的部分数字图像之间的第一偏移，第二偏移在第二边界的第二边界之间 测量对第一参考图像的参考图像和对应于第二边界的数字图像的一部分，将第一参考图像校正为第一校正参考图像，以消除所测量的第一偏差，第二参考图像 被校正为第二校正参考图像，以便消除所测量的第二d 基于第一和第二校正参考图像的逻辑和产生最终校正的参考图像，并且执行最终校正的参考图像和数字图像的匹配处理以区分表面的质量 套印物。

公开(公告)号：US5296942A

公开(公告)日：1994-03-22

申请号：US817805

申请日：1992-01-09

申请人： Yoshio Yokoyama ,  Takashi Hieda ,  Toshihiro Asai

发明人： Yoshio Yokoyama ,  Takashi Hieda ,  Toshihiro Asai

IPC分类号： G01J1/42 ,  G06K9/64 ,  H04N1/40

CPC分类号： G06K9/6202 ,  G01J1/42 ,  G01N2021/1765

摘要： An appratus for inspecting lightness on the surface of an object having at least first and second surface portions different in lightness, wherein an image of the first and second surface portions of the object are taken under appropriate illumination, the taken image is memorized, first and second reference lightness of the first and second surface portions are defined respectively, whether or not each pixel of the taken image belongs to either one of pixel regions defining the first and second surface portions are determined in accordance with values defining preliminarily memorized pixel regions respectively, lightness difference between each pixel of the taken image corresponding to the first surface portion and the first reference lightness is calculated, lightness difference between each pixel of the taken image corresponding to the second surface portion and said second reference lightness are calculated, and quality in lightness on the surface of the object are determined on a basis of the respective lightness difference.

摘要翻译： 一种用于检查具有至少具有不同亮度的第一和第二表面部分的物体的表面上的亮度的装置，其中在适当照明下拍摄物体的第一表面部分和第二表面部分的图像，首先记录拍摄的图像， 分别定义第一和第二表面部分的第二参考亮度，根据定义预先存储的像素区域的值来确定拍摄图像的每个像素是否属于限定第一和第二表面部分的像素区域中的任一个， 计算与第一表面部分相对应的拍摄图像的每个像素与第一参考亮度之间的亮度差，计算与第二表面部分相对应的拍摄图像的每个像素与所述第二参考亮度之间的亮度差，并且明亮度 在对象的表面上确定a 基础各自的亮度差异。