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    • 10. 发明授权
    • Image inspection apparatus
    • 图像检测仪
    • US08498489B2
    • 2013-07-30
    • US12920724
    • 2009-04-16
    • Yuichi AbeMitsuji IkedaYoshimichi SatoYasutaka Toyoda
    • Yuichi AbeMitsuji IkedaYoshimichi SatoYasutaka Toyoda
    • G06K9/62G06K9/00
    • G06T7/60G06K9/6203G06T7/74G06T2207/10061G06T2207/30148
    • The present invention provides a unified template matching technique which allows an adequate matching position to be provided even in an image with a distorted pattern shape and a variation in edge intensity. A correlation value contribution rate map is created for the vicinity of each of top candidate positions obtained by applying a centroid distance filter to a normalized correlation map resulting from template matching. A corrected intensity image is created from the correlation value contribution rate maps. Luminance correction is performed based on the corrected intensity image. Local matching is performed again on the vicinity of each candidate position. The candidates are then re-sorted based on candidate positions and correlation values newly obtained. Thus, even in an image with a distorted pattern shape and a variation in edge intensity, an adequate matching position can be provided in a unified manner.
    • 本发明提供了一种统一的模板匹配技术,其允许即使在具有失真的图案形状和边缘强度的变化的图像中也能够提供足够的匹配位置。 对于通过将质心距离滤波器应用于由模板匹配得到的归一化相关图而获得的每个顶候选位置的附近,创建相关值贡献率图。 从相关值贡献率图形创建校正强度图像。 基于校正强度图像进行亮度校正。 在每个候选位置附近再次执行局部匹配。 然后基于新获得的候选位置和相关值对候选者进行重新排序。 因此,即使在具有失真的图案形状和边缘强度的变化的图像中,也能够以统一的方式提供足够的匹配位置。