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    • 54. 发明授权
    • Method of and apparatus for discriminating sharp edge transitions
produced during optical scanning of differently reflective regions
    • 用于区分在不同反射区域的光学扫描期间产生的尖锐边缘变换的方法和装置
    • US4697088A
    • 1987-09-29
    • US747997
    • 1985-06-24
    • Robert Bishop
    • Robert Bishop
    • G06T1/00G01B11/02G01N21/88G01B11/10
    • G01N21/88G01B11/024
    • A method of and apparatus for discriminating sharp edge transitions produced during optical scanning, as by a CCD or the like, of differently reflective regions of a surface, such as copper conductors and resist background on printed circuit boards and similar applications, through delaying N successive sampling signals defining the edge transition of the desired edge transition regions slope and amplitude from unwanted reflections from other regions, subtracting each camera scan sampling signal from the previous Nth sample signal to produce a large difference signal only for the edge transitions, and adding such difference to the camera output signals to provide a distinctive boost to the edge transition signals which are then thresholded in a manner to insure rejection of signals from unwanted or spurious reflection regions into binary output signals unambiguously indentifying the edge transitions.
    • 通过延迟N个连续的方式来鉴别在诸如CCD等的光学扫描期间产生的表面的不同反射区域(例如铜导体和印刷电路板上的抗蚀背景)和类似应用的尖锐边缘转变的方法和装置 采样信号限定期望的边沿过渡区域的边缘跃迁从其他区域的不想要的反射中减去所需的边缘过渡区域的边缘转变,从前一个第N个采样信号中减去每个相机扫描采样信号,以产生仅用于边缘跃迁的较大的差分信号, 相机输出信号为边缘转换信号提供独特的提升,然后阈值化,以确保将信号从不需要的或假反射区域的信号抑制成二进制输出信号,明确地标识边缘转换。
    • 60. 发明授权
    • Automatic stripe width reader
    • 自动条带宽读码器
    • US4498779A
    • 1985-02-12
    • US72429
    • 1979-09-04
    • Peter D. SouthgateDavid W. FairbanksRichard B. DavisJohn P. Beltz
    • Peter D. SouthgateDavid W. FairbanksRichard B. DavisJohn P. Beltz
    • G01B11/02H01J9/42
    • G01B11/024
    • A system is provided for determining the widths and spacings of substantially parallel opaque stripes on a substrate, wherein the stripes are separated by openings. The system comprises a light source for illuminating the substrate and photodetecting means positioned to receive light from the illuminated substrate. Means are included for scanning the photodetecting means transverse to the stripes and for sweeping the photodetecting means in a direction substantially parallel to the stripes. The system further includes means for converting the output of the photodetecting means into a quantized signal, means for dividing the quantized signal into separate signals representing stripe widths and opening widths between stripes, and means for converting the stripe width and opening width signals into a signal representing center-to-center spacing between openings.
    • 提供了一种用于确定基板上基本上平行的不透明条纹的宽度和间距的系统,其中条纹由开口分开。 该系统包括用于照亮基板的光源和被定位成接收来自被照射的基板的光的光电检测装置。 包括用于扫描横向于条纹的光电检测装置的装置,并且用于沿基本平行于条纹的方向扫掠光电检测装置。 该系统还包括用于将光电检测装置的输出转换为量化信号的装置,用于将量化信号划分成表示条带宽度和条带之间的开口宽度的分离信号的装置,以及用于将条宽度和开口宽度信号转换成信号的装置 表示开口之间的中心间距。