公开(公告)号：US20020118349A1

公开(公告)日：2002-08-29

申请号：US10025917

申请日：2001-12-26

Applicant: Nikon Corporation

Inventor： Juping Yang ,  Toru Fujii ,  Fuyuhiko Inoue

IPC: G03B027/52 ,  G06K009/00

CPC classification number: G03F7/706 ,  G06T7/73

Abstract: Correlation values between a plurality of templates prepared beforehand and a picture-element data distribution as a pick-up result of an image are calculated, and the position of a maximum template whose correlation value is the maximum of the calculated correlation values is obtained. Subsequently, a curved surface function is calculated which fits the distribution of calculated correlation-values in positions near the maximum template's position, and the position of the picked-up image is calculated based on the curved surface function. As a result, the number of templates prepared beforehand to achieve desired accuracy in detecting a position and the number of times of calculating correlation-values can be reduced, and the image position can be quickly and accurately detected.

Abstract translation: 计算预先准备的多个模板与作为图像的拾取结果的图像元素数据分布之间的相关值，并获得相关值为所计算的相关值的最大值的最大模板的位置。 随后，计算出适合于最大模板位置附近的计算的相关值的分布的曲面函数，并且基于曲面函数来计算拍摄图像的位置。 结果，可以减少预先准备的用于实现检测位置的精确度和计算相关值的次数的模板的数量，并且可以快速和准确地检测图像位置。