Image analysis – Applications – Manufacturing or product inspection
Reexamination Certificate
2006-04-11
2006-04-11
Mehta, Bhavesh M. (Department: 2625)
Image analysis
Applications
Manufacturing or product inspection
C382S146000, C382S168000, C382S170000, C382S171000, C382S172000, C382S192000, C382S195000, C382S270000, C382S271000, C382S272000, C382S273000, C382S204000, C348S086000, C348S125000, C250S559470
Reexamination Certificate
active
07027637
ABSTRACT:
A method for determining a number of balls in a projection space comprises determining a projection of a portion of a ball grid array, determining at least one local maximum of the projection space for a given threshold, and determining at least a distance between adjacent maximum. The method further comprises determining an inter-peak histogram of the distances, determining an inter-ball distance for each pair of adjacent balls that has the maximum value of the inter-peak distance histogram corresponding to the pair of adjacent balls, and determining a position of a first ball and a position of a last ball. The method comprises verifying the position of the first ball and the position of the last ball based on a general inter-ball distance, and determining the number of balls.
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patent: 5936665 (1999-08-01), Vachtsevanos et al.
patent: 6614926 (2003-09-01), Fix et al.
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Fang Ming
Fang Tong
E. Chau & Associates, LLC
Mehta Bhavesh M.
Paschburg Donald B.
Siemens Corporate Research Inc.
Strege John
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