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    • 7. 发明申请
    • Pattern inspection method and its apparatus
    • 图案检验方法及其装置
    • US20090003682A1
    • 2009-01-01
    • US12230362
    • 2008-08-28
    • Kaoru SakaiShunji MaedaTakafumi Okabe
    • Kaoru SakaiShunji MaedaTakafumi Okabe
    • G06K9/00
    • G06T7/001G06T2207/30148
    • In a pattern inspection apparatus for comparing images of corresponding areas of two patterns, which are formed so as to be identical, so as to judge that a non-coincident part of the images is a defect, the influence of unevenness in brightness of patterns caused by a difference of thickness or the like is reduced, whereby highly sensitive pattern inspection is realized. In addition, high-speed pattern inspection can be carried out without changing the image comparison algorithm. For this purpose, the pattern inspection apparatus operates to perform comparison processing of images in parallel in plural areas. Further, the pattern inspection apparatus operates to convert gradation of an image signal among compared images using different plural processing units such that, even in the case in which a difference of brightness occurs in an identical pattern among images, a defect can be detected correctly.
    • 在用于比较形成为相同的两个图案的相应区域的图像的图形检查装置中,以判断图像的不重合的部分是缺陷,导致图案的亮度不均匀性的影响 通过减小厚度差等,从而实现高灵敏度图案检查。 此外,可以进行高速图案检查,而不改变图像比较算法。 为此,图案检查装置在多个区域中并行地执行图像的比较处理。 此外,图案检查装置进行操作以使用不同的多个处理单元来转换比较图像中的图像信号的灰度,使得即使在图像中以相同图案发生亮度差异的情况下,也可以正确检测缺陷。