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High precision image alignment detection

机译:高精度图像对准检测

摘要

High precision image alignment detection uses an iterative part pixel shift detection algorithm to accurately determine the displacement of a received image with respect to a reference image. An alignment pattern is inserted into the original image and a portion of the alignment pattern, such as a single line, also is stored as a reference image. Using cross-correlation the received image is compared with the reference image to locate the alignment pattern, and selected portions of the received image alignment pattern are then used in conjunction with the reference image to determine the total pixel shift of the received image. An integer pixel shift is determined by cross-correlation of the received alignment pattern with the reference image. Using the integer pixel shift to identify a starting point, data is extracted from the received alignment pattern about a specific feature and a part pixel shift is measured. The received alignment pattern is then shifted by the part pixel shift, the data is again extracted and an additional part pixel shift is measured. These steps are iterated, using the sum of all prior part pixel shifts for each subsequent shift. At completion the total of the integer pixel shift value and all the part pixel shift values determines the pixel shift required for registration of the received image vis a vis the original image.
机译:高精度图像对齐检测使用迭代部分像素偏移检测算法来准确确定接收图像相对于参考图像的位移。对准图案被插入到原始图像中,并且对准图案的一部分,例如单行,也被存储为参考图像。使用互相关,将接收到的图像与参考图像进行比较以找到对准图案,然后将接收到的图像对准图案的选定部分与参考图像一起使用,以确定接收到的图像的总像素偏移。通过接收的对准图案与参考图像的互相关来确定整数像素偏移。使用整数像素偏移来识别起点,从接收到的对齐模式中提取有关特定特征的数据,并测量部分像素偏移。然后,将接收到的对准图案移位部分像素移位,再次提取数据并测量另外的部分像素移位。使用每个后续移位的所有先前部分像素移位的总和来重复这些步骤。完成时,整数像素偏移值和所有部分像素偏移值的总和确定相对于原始图像对准接收图像所需的像素偏移。

著录项

  • 公开/公告号EP0939557A3

    专利类型

  • 公开/公告日2001-01-10

    原文格式PDF

  • 申请/专利权人 TEKTRONIX INC.;

    申请/专利号EP19990300969

  • 发明设计人 KUHN ALEXANDER;

    申请日1999-02-10

  • 分类号H04N17/00;

  • 国家 EP

  • 入库时间 2022-08-22 01:16:35

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