Image analysis – Pattern recognition – Limited to specially coded – human-readable characters
Reexamination Certificate
2004-12-30
2010-06-15
Alavi, Amir (Department: 2624)
Image analysis
Pattern recognition
Limited to specially coded, human-readable characters
C382S105000, C382S154000
Reexamination Certificate
active
07738706
ABSTRACT:
An apparatus and a concomitant method for rectification and recognition of symbols (e.g., to correct for the effects of perspective distortion, rotation and/or scale) in images of three-dimensional scenes is provided. The present method locates a reference region lying in a common plane with a symbol to be recognized, where the reference region represents an image of a planar object having assumed (e.g., known or standard) geometry and dimensions, along with at least four easily detectable correspondence points within that geometry. An image of the common plane is then rectified in three dimensions in accordance with the assumed dimensions of the reference region in order to produce a transformed (e.g., rectified) image of the symbol, which is significantly easier to recognize than the original imaged appearance of the symbol using existing recognition methods.
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Aradhye Hrishikesh
Myers Gregory K.
Alavi Amir
SRI - International
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