Adaptive threshold circuit for image processing
    1.
    发明授权
    Adaptive threshold circuit for image processing 失效
    用于图像处理的自适应阈值电路

    公开(公告)号:US4850029A

    公开(公告)日:1989-07-18

    申请号:US754685

    申请日:1985-07-15

    摘要: An adaptive threshold circuit is disclosed wherein reflectance values are measure D in each of a number of scan lines on a document on which an image is scanned, digitized at a multiplicity of points and processed to create a processed digitized image signal that is stored or transmitted and then used to recreate the document accurately without objectional light and dark variations over the recreated documents and without being affected by the background color of the original document, variations in illuminating and the black/white makeup of the image. The unprocessed digitized data is first used to calculate a mean value of the digitized reflectance values for each of a number of columns on the document. The same data is then used to calculate a mean-above-mean value for the same columns. Each digitized reflectance value is compared to the mean value and only when it exceeds the mean value is the mean-above-mean value updated. A threshold value is then calculated for each column using the updated mean above mean values for a particular column and for the two contiguous columns. At the same time the most recent threshold value for each column is compared to each unprocessed digitized reflectance value taken in the associated column and values above the threshold value are assigned a first binary value indicating the sample is white and values equal to or below are assigned the opposite binary value indicating the sample is black.

    摘要翻译: 公开了一种自适应阈值电路,其中反射率值是在其上扫描图像的文档上的多条扫描线中的每一条中测量D,并以多个点数字化并被处理以创建被存储或发送的经处理的数字化图像信号 然后用于准确地重新创建文档,而不会在重新创建的文档上产生不必要的明暗变化,并且不受原始文档的背景颜色,照明的变化和图像的黑/白化妆的影响。 未处理的数字化数据首先用于计算文档上的多个列中的每一个的数字化反射率值的平均值。 然后使用相同的数据来计算相同列的平均值。 将每个数字化反射率值与平均值进行比较,只有当超过平均值时才更新平均值。 然后使用更新的平均值高于特定列的平均值和两个连续列计算每列的阈值。 同时,将每列的最新阈值与在相关联的列中获取的每个未处理的数字化反射值进行比较,并且为阈值以上的值分配指示样本是白色的第一二进制值,并且分配等于或小于等于的值 指示样品的相反二进制值为黑色。

    Flexible deterministic state machine
    2.
    发明授权
    Flexible deterministic state machine 失效
    灵活的确定性状态机

    公开(公告)号:US5557782A

    公开(公告)日:1996-09-17

    申请号:US273763

    申请日:1994-07-12

    IPC分类号: G06F13/42 G06F12/00

    CPC分类号: G06F13/4243

    摘要: A computer system has a memory and has a processor coupled to the memory, the processor having an access control arrangement for delaying completion of a memory access until the occurrence of a control signal. A deterministic circuit coupled to the-processor and the memory has a register arrangement containing control information loaded by the processor, the deterministic circuit having a signal generation arrangement for generating the control signal. The signal generating arrangement includes a selective delay arrangement which can selectively delay generation of the control signal during an access to the memory by a time interval having a duration which is a function of the control information in the register arrangement.

    摘要翻译: 计算机系统具有存储器并且具有耦合到存储器的处理器,该处理器具有用于延迟存储器访问的完成的访问控制装置,直到出现控制信号。 耦合到处理器和存储器的确定性电路具有包含由处理器加载的控制信息的寄存器布置,确定性电路具有用于产生控制信号的信号产生装置。 信号产生装置包括选择性延迟装置,其可以在存储器访问期间选择性地延迟控制信号的产生,该时间间隔具有作为寄存器装置中的控制信息的函数的持续时间。

    System and method for detecting and reporting fabrication defects using a multi-variant image analysis
    3.
    发明授权
    System and method for detecting and reporting fabrication defects using a multi-variant image analysis 失效
    使用多变量图像分析来检测和报告制造缺陷的系统和方法

    公开(公告)号:US07463765B2

    公开(公告)日:2008-12-09

    申请号:US10785213

    申请日:2004-02-24

    IPC分类号: G06K9/00

    摘要: An inspection process and an inspection system (600) that utilize a plurality of residual defect signals 252(1), 252(2), . . . 252(n) to identify and report defects of interest in a copy (116) of a standard (112). The process includes performing a multi-variant defect extraction method (200) that includes applying a number n of pre-determined transforms to both a data file (232) containing the standard and an image file (204) containing the copy of the standard so as to create a plurality of conditioned data files (244(1), 244(2), . . . 244(n)) and a plurality of conditioned image files (216(1), 216(2), . . . 216(n)). The plurality of residual defect signals are extracted from these conditioned files. A defect analysis and reporting method (500) utilizes the residual defect signals to report defects contained in two or more of the residual defect signals.

    摘要翻译: 使用多个残余缺陷信号252(1),252(2),...的检查过程和检查系统(600)。 。 。 252(n)在标准(112)的副本(116)中识别和报告感兴趣的缺陷。 该过程包括执行多变量缺陷提取方法(200),其包括将包含标准的数据文件(232)和包含标准副本的图像文件(204)的数量n个预定变换应用于 为了创建多个条件数据文件(244(1),244(2),... 244(n))和多个调节图像文件(216(1),216(2)... 216 (n))。 从这些调节文件中提取多个残余缺陷信号。 缺陷分析和报告方法(500)利用剩余缺陷信号来报告两个或更多个残余缺陷信号中包含的缺陷。