Method and apparatus for recognition of symbols in images of three-dimensional scenes
First Claim
1. Method for rectifying at least one target object in a captured imagery, said method comprising:
- using a processor to perform steps comprising;
locating a reference region lying in a common plane with an image of said at least one target object, said reference region representing an image of a reference object that is defined by a bounding shape having geometry and dimensions that are known to said processor, where said image of said at least one target object lies outside of said bounding shape; and
rectifying an image of said common plane in accordance with said geometry and dimensions of said bounding shape.
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Accused Products
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.
84 Citations
24 Claims
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1. Method for rectifying at least one target object in a captured imagery, said method comprising:
using a processor to perform steps comprising; locating a reference region lying in a common plane with an image of said at least one target object, said reference region representing an image of a reference object that is defined by a bounding shape having geometry and dimensions that are known to said processor, where said image of said at least one target object lies outside of said bounding shape; and rectifying an image of said common plane in accordance with said geometry and dimensions of said bounding shape. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A computer readable medium containing an executable program for rectifying at least one target object in a captured imagery, where the program performs steps of:
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locating a reference region lying in a common plane with an image of said at least one target object, said reference region representing an image of a reference object that is defined by a bounding shape having geometry and dimensions that are known to a processor, where said image of said at least one target object lies outside of said bounding shape; and rectifying an image of said common plane in accordance with said geometry and dimensions of said bounding shape. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. Apparatus for rectifying at least one target object in a captured imagery, said apparatus comprising:
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means for locating a reference region lying in a common plane with an image of said at least one target object, said reference region representing an image of a reference object that is defined by a bounding shape having geometry and dimensions that are known to said apparatus, where said image of said at least one target object lies outside of said bounding shape; and means for rectifying an image of said common plane in accordance with said geometry and dimensions of said bounding shape. - View Dependent Claims (21)
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22. Method for rectifying at least one target object in a captured imagery, said method comprising:
using a processor to perform steps comprising; locating a reference region lying in a common plane with an image of said at least one target object, said reference region representing an image of a reference object that is distinct from said image of said at least one target object and has geometry and dimensions that are known to the processor; and rectifying along three axes an image of said common plane in accordance with said geometry and dimensions. - View Dependent Claims (23, 24)
Specification