Patent ID: 6888966
Filing Date: 2005-05-03
Classification: G06K,G06T

Abstract:
1. A method of identifying a target pattern in an image, said method comprising: a) establishing an inventory of characteristic pattern points within said target pattern and establishing a first record of relative distances between selected characteristic pattern points, said relative distances being recorded as the square of the actual distances between said selected characteristic pattern points; b) partitioning said image into a plurality of sub-image points; c) identifying at least two sub-image points having attributes substantially similar to a corresponding two of said characteristic pattern points; d) calculating the square of the distance between said identified two sub-image points and comparing said calculated square to the recorded relative distance of said corresponding two characteristic pattern points; e) determining that said target pattern has not been identified in response to no match being found in step (d); wherein step(a) further includes: wherein said identified sub-image points are given the identification indicator of their correspondingly matched characteristic pattern points, and further including; wherein said sub-image points forming the side-ends of said second angle are defined by X,Y coordinates of a cartesian plane having positional value relative to the sub-image point identified as the vertex of said second angle; said second angle parameter being defined as the sum of the product of the X coordinates and the product of the Y coordinates of said sub-image points at the side-ends of said second angle.