Feature point reduction for blood vessel biometric system
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United States of America Patent
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Jan 24, 2012
Grant Date -
Feb 14, 2008
app pub date -
Jul 25, 2007
filing date -
Jul 28, 2006
priority date (Note) -
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Abstract
To suitably reduce data amount. For example, feature points from a branch point or an end point to the next branch point or an end point in a blood vessel line are set as a group. In the three feature points satisfying one of the condition that the absolute value of the outer product of vectors in continuous three feature points is smaller than an outer product threshold value, and the condition that a cosine in the above three feature points is smaller than a cosine threshold value, the middle one of the three feature points satisfying the other of the above conditions and being the smallest is eliminated, for every group.
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