Traceability marks

Details Traceability marks Traceability marks

2007-03-30

2011-11-22

Bhatnagar, Anand (Department: 2624)

Image analysis

Image transformation or preprocessing

Measuring image properties

C382S103000, C382S128000, C382S145000, C382S153000, C382S190000, C382S224000, C382S276000, C348S087000, C348S135000, C235S462010

Reexamination Certificate

active

08064728

ABSTRACT:
The formation of marks on devices is described. In one embodiment, a method for marking a device includes forming a plurality of unique marks sequentially on a device. The method includes defining a virtual array having a plurality of cells extending in an x-direction and a plurality of cells extending in a y-direction, wherein the marks are each positioned in a cell in the virtual array. The method also includes capturing an image including the relative cell position of the marks within the virtual array and converting the relative position of the marks within the virtual array into a set of coordinates including an x value along the x-direction and a y value along the y-direction for each of the marks. The method also includes generating a device identification using a plurality of the x values and the y values. Other embodiments are described and claimed.

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Mehrotra and Gary, Similar-Shape Retrieval in Shape Data Management, IEEE 1995.

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